U.S. patent application number 10/771735 was filed with the patent office on 2004-08-12 for skin conditioner.
This patent application is currently assigned to Kabushiki Kaisha Soken. Invention is credited to Jo, Megumi, Tokuyama, Takashi.
Application Number | 20040156877 10/771735 |
Document ID | / |
Family ID | 32044520 |
Filed Date | 2004-08-12 |
United States Patent
Application |
20040156877 |
Kind Code |
A1 |
Tokuyama, Takashi ; et
al. |
August 12, 2004 |
Skin conditioner
Abstract
Moisture retention ability of skin is improved and/or skin is
protected or treated for another purpose by applying thereto a
composition containing at least one of the following compounds:
ethanolamine, 2-methoxyethylamine, O-phosphorylethanolamine,
2-ethylaminoethanol, diethanolamine, 2-dimethylaminoethanol,
choline, 2-amino-2-hydroxymethyl-- 1,3-propanediol, noradrenalin,
phenethylamine, ethylenediamine, taurine, phosphatidylethanolamine,
N-(2-hydroxyethyl)acetoamide, 2-(methylamino)ethanol,
2-anilinoethanol, 2-(benzylamino)ethanol, 3-amino-1-propanol,
2-amino-1-butanol, putrescine, DL-pyroglutamic acid and
triethanolamine.
Inventors: |
Tokuyama, Takashi;
(Ayauta-gun, JP) ; Jo, Megumi; (Ayauta-gun,
JP) |
Correspondence
Address: |
JORDAN AND HAMBURG LLP
122 EAST 42ND STREET
SUITE 4000
NEW YORK
NY
10168
US
|
Assignee: |
Kabushiki Kaisha Soken
Ayauta-gun
JP
|
Family ID: |
32044520 |
Appl. No.: |
10/771735 |
Filed: |
February 4, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10771735 |
Feb 4, 2004 |
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10680331 |
Oct 7, 2003 |
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10680331 |
Oct 7, 2003 |
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09623968 |
Sep 11, 2000 |
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09623968 |
Sep 11, 2000 |
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PCT/JP99/01161 |
Mar 10, 1999 |
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Current U.S.
Class: |
424/401 ;
424/750; 514/553; 514/565; 514/78 |
Current CPC
Class: |
A61K 8/44 20130101; A61Q
19/00 20130101; A61P 17/00 20180101; A61K 8/41 20130101; A61P 17/16
20180101 |
Class at
Publication: |
424/401 ;
424/750; 514/565; 514/078; 514/553 |
International
Class: |
A61K 031/685; A61K
007/00; A61K 031/185; A61K 035/78 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 11, 1998 |
JP |
103280/1998 |
Claims
1. A method of improving moisture retention ability of skin and/or
treating or protecting skin for another purpose, comprising
applying to skin a composition comprising a compound selected from
the group consisting of ethanolamine, 2-methoxyethylamine,
o-phosphorylethanolamine- , 2-ethylaminoethanol, diethanolamine,
2-dimethylaminoethanol, choline,
2-amino-2-hydroxymethyl-1,3-propanediol, noradrenalin,
phenethylamine, ethylenediamine, taurine, phosphatidylethanolamine,
N-(2-hydroxyethyl)acetoamide, 2-(methylamino)ethanol,
2-anilinoethanol, 2-(benzylamino)ethanol, 3-amino-1-propanol,
2-amino-1-butanol, putrescine, DL-pyroglutamic acid and
triethanolamine.
2. The method according to claim 1, wherein the composition further
comprises L-arginine.
3. The method according to claim 2, wherein the compound and/or
L-arginine originate in a rice preparation.
4. The method according to claim 2, wherein the compound originates
in a rice preparation.
5. The method according to claim 1, wherein the composition further
comprises a rice preparation in admixture with the compound.
6. The method according to claim 2, wherein the composition further
comprises L-arginine and/or a rice preparation in admixture with
the compound.
7. The method according to any one of claims 3-6, wherein the rice
preparation is produced by hydrating rice or crushed rice, adding
amylase or protease and allowing to react, and adding yeast
following completion of the reaction to perform saccharification
and fermentation.
8. The method according to any one of claims 3-6, wherein the rice
preparation is produced by hydrating rice or crushed rice, adding
one, two or all of amylase, protease and lipase, heating, and
extracting by heating or repeating these reactions at least
once.
9. The method according to claim 1, wherein the compound originates
in an animal, plant or microbial preparation.
10. The method according to claim 2, wherein the compound and/or
L-arginine originate in an animal, plant or microbial
preparation.
11. The method according to claim 1, wherein the composition
further comprises an animal, plant or microbial preparation in
admixture with the compound.
12. The method according to claim 2, wherein the composition
further comprises L-arginine and/or an animal, plant or microbial
preparation in admixture with the compound.
13. The method according to any one of claims 9-12, wherein the
animal, plant or microbial preparation is produced by fermenting an
animal, plant or microbial substance, or adding a fermenting sugar,
followed by fermentation.
14. The method according to any one of claims 9-12, wherein the
animal, plant or microbial preparation is produced by adding water,
as necessary, to the animal, plant or microbial material, adding
one, two or all of amylase, protease and lipase, heating, and
extracting by heating or further repeating these reactions at least
once.
15. The method according to claim 1, wherein the skin to which the
composition is applied requires prevention, prevention of
exacerbation or treatment of atopic dermatitis.
16. The method according to claim 1, wherein the skin to which the
composition is applied requires moisturization.
17. The method according to claim 1, wherein the skin to which the
composition is applied requires restoration of the barrier
mechanism and function thereof.
18. The method according to claim 1, wherein the skin to which the
composition is applied requires conditioning of corneal layer
thereof.
19. The method according to claim 1, wherein the skin to which the
composition is applied requires conditioning of epidermal
keratocytes thereof.
20. The method according to claim 1, wherein the skin to which the
composition is applied requires conditioning epidermis thereof.
21. The method according to claim 1, wherein the compound is
applied to the skin in the form of a combination of the compound
and a moisture retention agent.
22. The method according to claim 21, wherein the moisture
retention agent comprises one or more substances selected from the
group consisting of polyvalent alcohols selected from the group
consisting of glycerin, dipropyleneglycol and 1,3-butyleneglycol;
sugars selected from the group consisting of sorbitol, maltitol,
dextrin, hyaluronic acid and chitosan; mucopolysaccharides and
sugar derivatives; alcohols selected from the group consisting of
glycerin, dipropyleneglycol and 1,3-butyleneglycol; sugars selected
from the group consisting of sorbitol, maltitol, dextrin,
hyaluronic acid and chitosan; mucopolysaccharides and sugar
derivatives; polypeptides selected from the group consisting of
elastin and collagen; organic acids and their salts selected from
the group consisting of pyrrolidone carboxylic acid, citric acid,
lactic acid and salts thereof; biopharmaceutical and natural
moisture retention agents selected from the group consisting of
refined rice wine, rice bran, aloe, licorice and chamomile;
bio-component moisture retention agents selected from the group
consisting of vitamins, placental extract, urea, lecithins,
phospholipids, ceramides, cholesterols and sphingolipids; and
vegetable extracts, fruit extracts, kelp extracts, enzymes and
inorganic salts; and further comprises one or more substances
selected from the group consisting of animal oils, vegetable oils,
hydrocarbons, higher alcohols and esters.
23. The method according to claim 1, wherein the composition
further comprises a drug and/or base that can be used in externally
applied skin preparations as pharmaceuticals, quasi-drugs and
cosmetics.
24. The method according to claim 23, wherein the drug comprises
one or more kinds of substances selected from the group consisting
of bactericidal drugs, wound protective agents, wound healing
agents, drugs for suppurative diseases, analgesic, anti-itching,
astringent and antiphlogistic agents, immunosuppresants, drugs for
parasitic skin diseases, skin softeners, hair agents, vitamin
agents and biopharmaceuticals, and the base comprises one or more
kinds of substances selected from the group consisting of moisture
retention agents, astringents, refrigerants, antioxidants,
ultraviolet absorbers, infrared dispersants, preservatives,
antibiotics, chelating agents, surfactants, foaming agents,
stabilizers, penetrants, assistants, pH adjusters, buffers,
emulsifiers, opacifiers, fragrances and pigments.
25. The method according to claim 1, wherein the skin to which the
composition is applied requires prevention or treatment of skin
disease selected from the group consisting of atopic dermatitis,
dry skin symptoms, pruritis, frostbite, cracking, chapped skin,
skin aging symptoms, skin damage caused by ultraviolet rays,
darkening, blackening, skin disorders arising in the epidermis,
physicochemical skin disorders, skin symptoms caused by the use of
water, soap, detergents, surfactants or solvents, adverse side
effects of externally applied skin preparations, biological skin
disorders, dermatitis and eczema.
26. The method according to claim 25, wherein dry skin symptoms are
symptoms selected from atopic skin, dry or rough skin, aged skin,
ichthyosis, dry skin, chapped skin, asteatosis, xeroderma, dry
eczema, facial dry eczema and progressive volar keratoderma, and/or
selected from erythema, sclerosis and cornification, cracking,
scaling, wrinkles, itching and dry marks, while skin aging symptoms
are selected from wrinkles and decreased skin tightness and
elasticity, skin damage caused by ultraviolet rays is selected from
spots and freckles, skin disorders arising from the epidermis are
selected from turnover abnormalities, fineness and moistness,
physicochemical skin disorders are selected from cuts, burns and
floor burns, biological skin disorders are selected from athlete's
foot and skin infections, and inflammatory cornification disorders
are selected from the group consisting to dermatitis and
eczema.
27. The method according to claim 25, wherein the skin disease is
skin aging symptoms.
28. The method according to claim 25, wherein the skin disease is
selected from the group consisting of darkening, wrinkles and
decreased skin tightness and elasticity, and spots.
29. The method according to claim 1, wherein the composition
comprises cosmetic, quasi-drug or pharmaceutical.
Description
TECHNICAL FIELD
[0001] The present invention relates to a skin conditioner that can
be used in a broad range of fields including cosmetics, quasi-drugs
and pharmaceuticals.
BACKGROUND ART
[0002] In addition to that resulting from aging, human skin and
scalp have recently become constantly exposed to risks from
external factors such as ultraviolet rays, drying,
air-conditioning, air pollution, other irritants and
microorganisms, and from internal factors such as contamination by
food, water or agricultural chemicals and additives through them,
as well as sleep, fatigue and stress.
[0003] As a result of these risks, there are many persons with
unhealthy skin or persons having skin that at first appears
healthy, but is actually in a functionally or structurally
unhealthy state. Even persons of an age who ought to inherently
have healthy skin have skin that requires the use of cosmetics.
However, typical moisture retention agents and oils used in current
cosmetics are known to only reach the surface of the skin, and only
function as a moisture covering or oil covering without actually
acting on the skin.
[0004] On the other hand, although oils such as Vaseline have long
been used for treatment of symptoms and diseases caused by drying
of the skin, these are also merely carried on the surface of the
skin, thereby forcing the affected person to wait for the symptoms
or disease to heal naturally. In addition, since the effects of
typical drugs only act on the particular symptom and do not promote
the health of the skin itself, in environments like those found at
present, if confronted with the same cause after use is
discontinued, there are many cases in which the symptom or disease
recurs. In addition, drugs also constantly present the risk of
being accompanied by adverse side effects.
DISCLOSURE OF THE INVENTION
[0005] Currently in the field of dermatology, it has become an
established theory around the world that the corneal layer of the
epidermis (stratum corneum epidermidis) is responsible for the
barrier mechanism that protects the body from the outside world.
Therefore, we felt that restoring the skin to its inherently
healthy state is the basis of beauty as well as the basic measure
for protecting the body from all types of diseases of the skin. In
order to accomplish this, the object of the present invention is to
condition the corneal layer, condition the entire epidermis and
finally condition all skin tissue including the dermis.
[0006] In order to accomplish the above object of the present
invention, the invention of claim 1 provides a skin conditioner
containing one kind or two or more kinds of a compound represented
by the following general formula (1): 1
[0007] (wherein, R.sub.1 represents a hydroxyl group, a lower
alkoxy group that may optionally have a substituent, a
phosphoryloxy group, an aryl group, an amino group, a sulfonic acid
group, a phosphatidyloxy group, a lower alkyl group substituted
with a hydroxyl group or an amino group or a lower alkyl group
substituted with a guanidino group;
[0008] R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each independently
represent a hydrogen atom, a lower alkyl group that may optionally
be substituted with a hydroxyl group, an aryl group that may
optionally be substituted with a hydroxyl group, a carboxyl group,
or R.sub.4 and R.sub.5, together with an adjacent carbon atom, form
a carbonyl group;
[0009] R.sub.6 and R.sub.7 each independently represent a hydrogen
atom, a lower alkyl group that may optionally be substituted with a
hydroxyl group, a lower alkylcarbonyl group, an aryl group, an
aralkyl group, or R.sub.6 and R.sub.2 represent alkylene groups,
which may optionally have a substituent, that together form a
5-membered ring with an adjacent atom; and, nitrogen atoms in the
formula may be in a quaternary form with a lower alkyl group).
[0010] Lower alkyl groups in the present invention are straight or
branched alkyl groups having 1 to 10 carbon atoms, and preferably 1
to 5 carbon atoms, examples of which include a methyl group and an
ethyl group. Lower alkoxy groups are those which are derived from
the above-mentioned lower alkyl groups, examples of which include a
methoxy group and ethoxy group. Aryl groups having 6 to 18 carbon
atoms, and preferably 6 to 10 carbon atoms, examples of which
include a phenyl group and a naphthyl group. Aralkyl groups are
those in which an aryl group is substituted for the above-mentioned
lower alkyl group, examples of which include a benzyl group and
phenythyl group.
[0011] In addition, these groups may optionally be substituted with
a substituent, while preferable examples of substituent include a
hydroxyl group, amino group and carboxyl group.
[0012] The invention of claim 2 provides a skin conditioner wherein
the compound represented by general formula (1) is L-arginine.
[0013] The invention of claim 3 provides a skin conditioner wherein
the compound represented by general formula (1) is
ethanolamine.
[0014] The invention of claim 4 provides a skin conditioner wherein
the compound represented by general formula (1) is a compound
selected from the group consisting of 2-methoxyethylamine,
O-phosphorylethanolamine, 2-ethylaminoethanol, diethanolamine,
2-dimethylaminoethanol, choline,
2-amino-2-hydroxymethyl-1,3-propanediol, noradrenalin,
phenethylamine, ethylenediamine, taurine, phosphatidylethanolamine,
N-(2-hydroxyethyl)acetamide, 2-(methylamino)ethanol,
2-anilinoethanol, 2-(benzylamino)ethanol, 3-amino-1-propanol,
2-amino-1-butanol, putrescine, DL-pyroglutamic acid and
triethanolamine.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 shows the results of performing a collagen production
recovery test on damaged fibroblasts for Examples of the present
invention.
[0016] FIG. 2 shows the results of a moisture retention duration
test on Examples of the present invention.
[0017] FIG. 3 shows the results of a moisture retention duration
test on an Example of the present invention.
[0018] FIG. 4 shows the results of performing a moisture retention
ability test on Examples of the present invention.
[0019] FIG. 5 shows the results of performing a moisture retention
ability test on Examples of the present invention.
[0020] FIG. 6 shows the results of a 2-hour moisture retention
duration test according to Examples of the present invention.
[0021] FIG. 7 shows the results of a 2-hour moisture retention
duration test according to Examples of the present invention.
[0022] FIG. 8 shows the results of a chapped skin recovery test
according to Examples of the present invention.
[0023] FIG. 9 shows the overall improvement (usefulness) of using
Examples of the present invention in dry eczema, xeroderma and
facial dry eczema patients.
[0024] FIG. 10 shows improvement of itchiness, sclerosis and
cornification by Examples of the present invention.
[0025] FIG. 11 shows improvement of scaling and cracking by
Examples of the present invention.
[0026] FIG. 12 shows improvement of erythema, dryness and wrinkles
by Examples of the present invention.
[0027] FIG. 13 shows overall improvement (usefulness) of using
Examples of the present invention in asteatosis, xeroderma, facial
dry eczema and progressive volar keratoderma (keratodermia tylodes
palmaris progressive) patients.
[0028] FIG. 14 shows improvement of itchiness, sclerosis and
cornification by Examples of the present invention.
[0029] FIG. 15 shows improvement of scaling and cracking by
Examples of the present invention.
[0030] FIG. 16 shows improvement of erythema, dryness and wrinkles
by Examples of the present invention.
[0031] FIG. 17 shows changes in the severity score of vasodilation
by Examples of the present invention.
[0032] FIG. 18 shows changes in the severity score of cellular
infiltration by Examples of the present invention.
[0033] FIG. 19 shows changes in the severity score of keratin
hyperplasia by Examples of the present invention.
[0034] FIG. 20 shows changes in the severity score of parakeratosis
by Examples of the present invention.
[0035] FIGS. 21 to 31 show the results of a moisture retention
duration test performed on atopic skin according to Examples of the
present invention.
[0036] FIGS. 32 to 34 show the results of a moisture retention
ability test performed on atopic skin according to Examples of the
present invention.
[0037] FIGS. 35 to 37 show the results of a test of transepidermal
moisture evaporation volume performed on atopic skin according to
Examples of the present invention.
[0038] FIG. 38 shows the results of an allergic reaction inhibition
test according to Examples of the present invention.
[0039] FIGS. 39 to 50 show changes in the severity score performed
on atopic skin according to Examples. of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION
TEST EXAMPLE 1
[0040] A collagen production recovery test was conducted on damaged
fibroblasts.
[0041] Fibroblasts are cells that compose the dermis which is on
the inside of the skin epidermis. Collagen produced by fibroblasts
accounts for approximately 70% of the weight of the dermis, and
gives the skin tightness, elasticity and flexibility. In addition,
when the skin becomes injured and so forth, it also fulfills the
role of the regenerative function of the skin. As the skin ages,
the amount of collagen decreases dramatically. Consequently, the
skin loses its tightness and elasticity, and wounds are known to
heal more slowly. In addition, even in the absence of aging of the
skin, the ability to produce collagen decreases due to various
causes such as routine exposure to ultraviolet rays and radiation,
and the generation of active oxygen.
[0042] Samples:
[0043] Example 1
[0044] 1% aqueous solution of L-arginine (Nakarai Tesuku)
[0045] Example 2
[0046] 1% aqueous solution of ethanolamine (Nakarai Tesuku)
[0047] Example 3
[0048] After crushing 1 kg of rice with a crusher, 250 g of water
were mixed in well while spraying followed by allowing to stand for
30 minutes. Next, the rice was boiled for 60 minutes followed by
the addition of 2000 mL of water. Moreover, after adding 7.5 g each
of .alpha.-amylase and .beta.-amylase, the mixture was allowed to
stand for 10 hours at 55.degree. C. Next, after gradually raising
the temperature and boiling for 5 minutes, the mixture was cooled
to 50.degree. C. followed by the addition of 30 g of citric acid, 8
g of acidic protease and 8 g of acidic carboxypeptidase and
allowing to react for 24 hours. After completion of the reaction,
the mixture was cooled to 20.degree. C. followed by the addition of
200 g of malted rice (Aspergillus oryzae) and pre-cultured
Saccharomyces cereviciae culture broth, and fermenting at
20-25.degree. C. for 20 days.
[0049] Following completion of fermentation, the mixture was
press-filtered to obtain 2700 mL of filtrate. Next, 500 mL of
activated charcoal were packed into a column and the filtrate was
passed through the column. The resulting effluent was collected to
obtain 2700 mL of product containing 1934 mg/L of L-arginine and
162 mg/L of ethanolamine. (The concentration of L-arginine was
approximately 0.2%, and that of ethanolamine was approximately
0.02%.)
[0050] Mixture of samples of Example 1 and Example 2:
[0051] Mixture of samples of Example 1 and 2 with the product of
Example 3:
[0052] Test Method:
[0053] Six to eight subcultures of normal human skin fibroblasts
(Physicochemical Research Institute, Cell Development Bank NBIRGB)
were used in the test.
[0054] Hypoxanthine at a final concentration of 50 .mu.M and 34.5
mU/dish of xanthine oxidase were added to the culture broth to
generate active oxygen and lower the collagen production ability of
the cells.
[0055] Measurement of collagen production ability of a confluent in
the steady state was performed according to the method of Webster
et al. based on the uptake of .sup.3H-proline into the produced
collagen. Furthermore, the samples were mixed with the cells to a
final concentration of 3.3% (taking 1% to be 100% for a 1% aqueous
solution) and after incubating at 37.degree. C. for 24 hours and 5%
CO.sub.2, the .sup.3H activity taken up into the collagen in the
cells was measured.
[0056] Reference: Principle of Measurement of Collagen Production
Ability
[0057] Since proline is a main component of the amino acids that
compose collagen, fibroblasts are cultured in a medium containing
.sup.3H-proline, and the .sup.3H activity taken up into collagen in
the cells is measured. Units are in d.p.m., and represent the
number of daltons of radioactivity released per minute.
[0058] Test Results:
[0059] As shown in FIG. 1, according to the results of a collagen
production recovery test, the collagen production ability of
fibroblasts damaged by active oxygen was determined to be
significantly improved by L-arginine and ethanolamine. Although
L-arginine and ethanolamine are contained in the product of Example
3, since the amounts are excessively small, production was nearly
equal to Example 1. When 1% L-arginine and 1% ethanolamine were
further added to the product of Example 3, production nearly
completely recovered.
[0060] Namely, although remarkable recovery is observed with
L-arginine or ethanolamine alone, if both L-arginine and
ethanolamine are present and their amounts are increased, the
collagen production ability of damaged fibroblasts can be nearly
completely restored to its original normal level.
TEST EXAMPLE 2
[0061] A moisture retention duration test was conducted.
[0062] Moisture retention refers to the peak of the amount of skin
moisture (skin electrical conductivity) 15 minutes after
application, while moisture retention duration refers to the
integral value of a curve indicated by the amount of skin moisture
(skin electrical conductivity) from 30 minutes to 120 minutes after
application.
[0063] Samples:
[0064] Example 4 (1% L-arginine simple preparation)
1 L-arginine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0065] Make up a final amount of 100.00 g by addition of purified
water.
[0066] Example 5 (1% Ethanolamine simple preparation)
2 Ethanolamine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0067] Make up a final amount of 100.00 g by addition of purified
water.
[0068] Example 6 (0.2% L-arginine+0.02% Ethanolamine+simple
preparation)
3 Example 3 90.00 mL 95% Ethanol 2.00 mL Parabene 0.18 g Purified
soy bean lecithin 0.05 g
[0069] Make up a final amount of 100.00 g by addition of purified
water.
[0070] Comparative Example 1 (simple preparation)
4 95% Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin
0.05 g
[0071] Make up a final amount of 100.00 g by addition of purified
water.
[0072] Comparative Example 2 (Hyaluronic acid+simple
preparation)
5 Sodium hyaluronate (2) 1.00 g 95% Ethanol 2.00 mL Parabene 0.18 g
Purified soy bean lecithin 0.05 g
[0073] Make up a final amount of 100.00 g by addition of purified
water.
[0074] Panelists: 5 healthy volunteers
[0075] Test Method: Each sample was applied to the side of the
forearm of the panelists (4.times.4 cm.sup.2) followed by
measurement of epidermal keratin moisture content at 15, 30, 60, 90
and 120 minutes after application.
[0076] Keratin contains salts, amino acids and other electrolytes
in addition to moisture. Consequently, although current does not
flow through pure water, since electrolytes are contained in
keratin in the skin, current flows corresponding to the amount of
moisture present if moisture is present. The parameter that is
actually measured is electrical conductivity, which is the inverse
of the resistance that composes impedance.
[0077] Measurement Method:
[0078] (1) The test site is washed with soap.
[0079] (2) The test site is exposed in a constant temperature and
constant humidity room at a temperature of 20.degree. C. and
humidity of 50%, and the skin is allowed to reach a steady state by
allowing the panelists to rest quietly starting 60 minutes before
measurement.
[0080] (3) The moisture content of keratin at the test site is.
measured and used as the value before application.
[0081] (4) After uniformly applying 0.03 mL aliquots of sample to
the test site four times, the sample is gently wiped off with
gauze.
[0082] (5) The moisture content of the keratin at the test site 15,
30, 60, 90 and 120 minutes after application, and that of keratin
at a site at which sample is not applied as a control, were
measured.
[0083] Numerical values obtained by subtracting the value before
application and value of the site where sample was not applied from
the keratin moisture content for each measurement time were taken
to represent skin moisture content.
[0084] Test Apparatus:
[0085] SKICON-200 (IBS Epidermal Keratin Moisture Measuring System
(3.5 MHz high-frequency conductivity measuring system))
[0086] Test Results:
[0087] The results of the moisture retention duration test are as
shown in FIGS. 2 and 3.
[0088] Although peak values rose even at 15 minutes after
application and moisture retention effects were remarkable for
Examples 4, 5 and 6, moisture retention continued beyond 30 minutes
and lasted for 2 hours. Although continuation of moisture retention
was observed with either L-arginine or ethanolamine alone, when
both substances were present, moisture retention duration was
enhanced more than when either substance was used alone even at
lower concentrations.
[0089] On the other hand, although peaks were observed after 15
minutes in the case of Comparative Examples 1 and 2, moisture
content returned to its original level after 30 minutes, and
continuation of moisture retention was not observed at all.
TEST EXAMPLE 3
[0090] A moisture retention ability test was conducted as an
indicator of the state of skin health.
[0091] Samples:
[0092] Example 4 (L-arginine+simple preparation)
[0093] Example 5 (Ethanolamine+simple preparation)
[0094] Example 6 (L-arginine+ethanolamine+simple preparation)
[0095] Example 7 (L-arginine+ethanolamine+body soap
preparation)
6 Example 3 20.00 mL Lauric acid 2.50 g Myristic acid 7.50 g
Palmitic acid 2.50 g Oleic acid 2.50 g Lauroyldiethanolamide 5.00 g
Glycerin 20.00 g Parabene 0.20 g Caustic potash 3.60 g Edetate 0.20
g Fragrance q.s.
[0096] Make up a final amount of 100.00 g by addition of purified
water.
[0097] Comparative Example 1 (simple preparation)
[0098] Comparative Example 3
7 Lauric acid 2.50 g Myristic acid 7.50 g Palmitic acid 2.50 g
Oleic acid 2.50 g Lauroyldiethanolamide 5.00 g Glycerin 20.00 g
Parabene 0.20 g Caustic potash 3.60 g Edetate 0.20 g Fragrance
q.s.
[0099] Make up a final amount of 100.00 g by addition of purified
water.
[0100] Subjects: 4 healthy volunteers
[0101] Measurement Method:
[0102] (1) The test site is washed with soap.
[0103] (2) The test site is exposed in a constant temperature and
constant humidity room at a temperature of 20.degree. C. and
humidity of 50%, and the skin is allowed to reach a steady state by
allowing the subjects to rest quietly starting 60 minutes before
measurement.
[0104] (3) The moisture content of keratin at the test site is
measured.
[0105] (4) 0.03 mL of distilled water is placed over the test site
and wiped off with gauze 10 seconds later followed by measurement
of keratin moisture content at the test site immediately, 30, 60,
90 and 120 seconds after wiping off.
[0106] (5) 0.03 mL aliquots of sample are applied to the test site
three times and allowed to stand for 15 minutes.
[0107] (6) The test site is washed well.
[0108] (7) After 120 minutes, keratin moisture content is measured
after 120 seconds by performing the same procedure as in step
(4).
[0109] Moisture retention ability is determined in the manner
indicated below.
Moisture retention ability (%)=[Keratin moisture content 30-120
seconds after moisture loading/Keratin moisture content immediately
after moisture loading].times.100
[0110] It should be noted that, moisture retention ability (ratio)
was expressed as the ratio obtained when the moisture retention
ability before washing (%) is given a value of 1.
[0111] Test Apparatus: Same as Test Example 2.
[0112] Test Results:
[0113] The results of the moisture retention ability test are as
shown in FIGS. 4 and 5.
[0114] Although there was no increase whatsoever in moisture
retention ability, which represents the health of the skin,
observed for Comparative Example 1, the moisture retention ability
2 hours after application in Examples 4, 5 and 6 increased
considerably as compared with the moisture retention ability before
application. When the moisture retention ability before application
is taken to have a value of 1, although that of Examples 4and 5 is
nearly two times greater, in Example 6, the moisture retention
ability increased to nearly three times greater.
[0115] In the case of washing with the product of Comparative
Example 3, although moisture retention ability decreases as
compared with that before washing, washing with Example 7 resulted
in an increase in moisture retention ability as compared with
before washing.
TEST EXAMPLE 4
[0116] A moisture retention duration test was conducted on persons
with chapped skin.
[0117] Samples:
[0118] Example 4 (L-arginine+simple preparation)
[0119] Example 5 (ethanolamine+simple preparation)
[0120] Example 6 (L-arginine+ethanolamine+simple p reparation)
[0121] Comparative Example 1
[0122] Comparative Example 2
[0123] Panelists: 6 volunteers with chapped skin
[0124] Test Method:
[0125] Each sample was applied to the side of the forearm of the
panelists (4.times.4 cm.sup.2) followed by measurement of epidermal
keratin moisture content at 15, 30, 60 and 120 minutes after
application.
[0126] Measurement Method: Same as measurement method of Test
Example 2.
[0127] Determination of Skin Moisture Content: Same as Test Example
2.
[0128] Test Apparatus: Same as Test Example 2.
[0129] Test Results:
[0130] As shown in FIGS. 6 and 7, although the peaks increased and
moisture retention effects were remarkable after 15 minutes for
Examples 4, 5 and 6, moisture retention continued beyond 30 minutes
and lasted for 2 hours. Although this continuation of moisture
retention was also observed in Examples 4 and 5, the duration of
moisture retention was even greater in Example 6 that contained
both L-arginine and ethanolamine.
[0131] In Comparative Example 2, although a peak was observed after
15 minutes and moisture retention effects were observed, moisture
content returned to its original level after 30 minutes., and
continuation of moisture retention with respect to chapped skin was
not observed at all.
TEST EXAMPLE 5
[0132] Chapped skin was induced artificially and a recovery test
was conducted to observe the effects against damaged skin (skin
susceptible to both external and internal irritation).
[0133] Samples:
[0134] Example 6 (L-arginine+ethanolamine+simple preparation)
[0135] Example 8 (L-arginine+ethanolamine+cream preparation)
8 Example 3 40.00 mL 1,3-butyleneglycol 6.00 g Concentrated
glycerin 6.00 g Methylpolysiloxane 6.00 g Stearic acid 3.00 g
Cetanol 3.00 g Cetyl 2-ethylhexanoate 6.00 g Squalene 6.00 g
Sucrose fatty acid ester 3.00 g Natural vitamin E 0.30 g Sodium
casein 1.50 g Disodium edetate 0.03 g Parabene 0.30 g
[0136] Make up a final amount of 100.00 g by addition of purified
water.
[0137] Comparative Example 1
[0138] Comparative Example 2
[0139] Comparative Example 4 (cream preparation)
9 1,3-butyleneglycol 6.00 g Concentrated glycerin 6.00 g
Methylpolysiloxane 6.00 g Stearic acid 3.00 g Cetanol 3.00 g Cetyl
2-ethylhexanoate 6.00 g Squalene 6.00 g Sucrose fatty acid ester
3.00 g Natural vitamin E 0.30 g Sodium casein 1.50 g Disodium
edetate 0.03 g Parabene 0.30 g
[0140] Make up a final amount of 100.00 g by addition of purified
water.
[0141] Panelists: 4 healthy volunteers
[0142] Test Method: After inducing chapped skin by treating a
healthy site of the skin for 30 minutes with 5% SDS, each sample
was applied twice per day, and the instantaneous moisture retention
ability before application and from 1 day to 2 weeks after
application was measured according to the same method as Test
Example 3.
[0143] Chapped Skin Induction Method: A glass cylinder was placed
on the test site and fixed in position with tape. Next, 10 mL of 5%
SDS (sodium lauryl sulfate) was poured into the glass cylinder to
perform chapped skin treatment for 30 minutes while stirring
occasionally. Finally, the SDS was suctioned out of the glass
cylinder and the glass cylinder was removed.
[0144] Test Apparatus: Same as Test Example 2.
[0145] Test Results:
[0146] According to the results of the chapped skin recovery test
(FIG. 8), only natural recovery of the skin was observed with the
simple preparation form, the typical moisture retention agent,
hyaluronic acid, and a typical cream preparation not containing
L-arginine or ethanolamine, and chapped skin improvement effects
were not observed. On the other hand, in the case of Examples 6 and
8, moisture retention ability increased significantly in comparison
with the control group at 3, 5 and 7 days after the start of
application, and moisture retention ability was higher than the
untreated site (healthy site) starting at 5 days after the start of
application.
[0147] In this manner, Examples 6 and 8 were clearly demonstrated
to rapidly restore damaged skin and improve the skin to healthy
skin to a greater extent than the untreated site.
[0148] The present invention was proven to rapidly restore damaged
skin in a short period of time, enable the skin to reach a state
that is healthier than its original state, and have effects that
improve the skin to its healthiest state. On the basis of these
findings, the present invention was proven to act on chapped skin
itself and condition it, be able to prevent skin diseases caused by
chapped skin, and demonstrate chapped skin therapeutic effects.
TEST EXAMPLE 6
[0149] A clinical test was conducted on dry eczema, xeroderma and
facial dry eczema patients to observe the therapeutic effects on
skin diseases produced by skin conditioning, and those effects were
evaluated in terms of the severity score of itchiness, sclerosis,
cornification, scaling, cracking, erythema, dryness and wrinkles,
as well as overall improvement (usefulness) with respect to each
disease.
[0150] Samples:
[0151] Example 9 (L-arginine+milky liquid preparation)
10 L-arginine (Nakarai Tesuku) 0.10 g 1,3-butyleneglycol 10.00 g
Concentrated glycerin 1.00 g Stearic acid 0.50 g Myristic acid 0.50
g Bleached beeswax 0.50 g Tri-2-ethylhexanoate glycerin 4.80 g
Octyldodecylmyristic acid 2.00 g Squalene 1.00 g Sucrose fatty acid
ester 0.60 g Xanthane rubber 0.10 g Natural vitamin E 0.10 g Sodium
casein 0.30 g Citric acid q.s. Disodium edetate 0.02 g Parabene
0.20 g
[0152] Make up a final amount of 100.00 g by addition of soft
water.
[0153] Panelists: 3 patients with dry eczema
[0154] 2 patients with xeroderma
[0155] 2 patients with facial dry eczema
[0156] Test Sites:
[0157] Sites having symptoms suitable for evaluation and sites that
can be compared to the left or right or above or below (comparison
with non-application).
[0158] External Application Method: Simple application twice per
day (morning and evening).
[0159] Application Period: 3 weeks
[0160] Evaluation Items:
[0161] Evaluation items consisted of:
[0162] (1) Itchiness
[0163] (2) Sclerosis/cornification
[0164] (3) Scaling
[0165] (4) Cracking
[0166] (5) Erythema
[0167] (6) Dryness
[0168] (7) Wrinkles
[0169] Evaluation Method:
[0170] The evaluation items were evaluated according to the
following four levels of a severity score as determined by visual
examination.
[0171] 3: Advanced symptoms
[0172] 2: Moderate symptoms
[0173] 1: Mild symptoms
[0174] 0: No symptoms or symptoms disappeared
[0175] In addition, overall improvement (usefulness) was evaluated
according to the following four levels:
[0176] Extremely useful
[0177] Useful
[0178] Somewhat useful
[0179] Not useful
[0180] Test Results:
[0181] The results for overall improvement (usefulness) are as
shown in FIG. 9. When Example 9 product was used in patients with
dry eczema, xeroderma and facial dry eczema, the results
demonstrated overall improvement of 100%, a high degree of
usefulness was obtained, and Example 9 was recognized to be
extremely useful against these diseases.
[0182] FIG. 10 shows the changes in severity scores for itchiness,
sclerosis and cornification. FIG. 11. shows the changes in severity
scores for scaling and cracking. FIG. 12 shows the changes in
severity scores for erythema, dryness and wrinkles. All effects
appeared rapidly, and all symptoms were alleviated considerably
after 1 week of use. Favorable improvement effects were also
observed after 1 week, and nearly all symptoms had either been
alleviated or disappeared after 3 weeks. It should be noted that,
there were no adverse side effects observed at all, there were no
cases of relapse after use was discontinued, and the patients were
completely healed.
[0183] In this manner, the present invention is able to improve
symptoms observed in skin diseases such as itchiness, sclerosis,
cornification, scaling, cracking, erythema, dryness and wrinkles
through conditioning of the skin.
TEST EXAMPLE 7
[0184] A clinical test was conducted on asteatosis, xeroderma,
facial dry eczema and progressive volar keratoderma patients to
observe the therapeutic effects on skin diseases produced by skin
conditioning, and those effects were evaluated in terms of the
severity score of itchiness, sclerosis, cornification, scaling,
cracking, erythema, dryness and wrinkles, as well as overall
improvement (usefulness) with respect to each disease.
[0185] Samples:
[0186] Example 10 (L-arginine+ethanolamine+milky liquid
preparation)
11 Example 3 35.00 mL 1,3-butyleneglycol 10.00 g Concentrated
glycerin 1.00 g Stearic acid 0.50 g Myristic acid 0.50 g Bleached
beeswax 0.50 g Tri-2-ethylhexanoate glycerin 4.80 g
Octyldodecylmyristic acid 2.00 g Squalene 1.00 g Sucrose fatty acid
ester 0.60 g Xanthane rubber 0.10 g Natural vitamin E 0.10 g Sodium
casein 0.30 g Citric acid q.s. Disodium edetate 0.02 g Parabene
0.20 g
[0187] Make up a final amount of 100.00 g by addition of soft
water.
12 Panelists: Asteatosis patients 6 Xeroderma patients 4 Facial dry
eczema patients 4 Progressive volar keratoderma 5 patients
[0188] Test Sites:
[0189] Sites having symptoms suitable for evaluation and sites that
can be compared to the left or right or above or below (comparison
with non-application).
[0190] External Application Method: Simple application once per day
(morning and evening).
[0191] Application Period: 3 weeks
[0192] Evaluation Items:
[0193] Evaluation items consisted of:
[0194] (1) Itchiness
[0195] (2) Sclerosis/cornification
[0196] (3) Scaling
[0197] (4) Cracking
[0198] (5) Erythema
[0199] (6) Dryness
[0200] (7) Wrinkles
[0201] Evaluation Method:
[0202] The evaluation items were evaluated according to the
following four levels of a severity score as determined by visual
examination.
[0203] 3: Advanced symptoms
[0204] 2: Moderate symptoms
[0205] 1: Mild symptoms
[0206] 0: No symptoms or symptoms disappeared
[0207] In addition, overall improvement (usefulness) was evaluated
according to the following four levels:
[0208] Extremely useful
[0209] Useful
[0210] Somewhat useful
[0211] Not useful
[0212] Test Results:
[0213] Overall improvement (usefulness) was as shown in FIG.
13.
[0214] When Example 10 was used in asteatosis, xeroderma, facial
dry eczema and progressive volar keratoderma patients, it
demonstrated overall improvement of 94.74%, a high degree of
usefulness was obtained, and Example 10 was observed to be
extremely useful against these diseases.
[0215] FIG. 14 shows the changes in severity scores for itchiness,
sclerosis and cornification, FIG. 15 shows the changes in severity
scores for scaling and cracking, and FIG. 16 shows the changes in
severity scores for erythema, dryness and wrinkles. All effects
appeared rapidly, and all symptoms were alleviated considerably
after 1 week of use. Favorable improvement effects were also
observed after 1 week, and nearly all symptoms had either been
alleviated or disappeared after 3 weeks. Furthermore, there were no
adverse side effects observed at all, there were no cases of
relapse after use was discontinued, and the patients were
completely healed.
[0216] In this manner, the present invention is able to improve
symptoms observed in skin diseases such as itchiness, sclerosis,
cornification, scaling, cracking, erythema, dryness and wrinkles
through conditioning of the skin.
TEST EXAMPLE 8
[0217] Guinea pigs were irradiated with ultraviolet light, a
phlogogenic factor, followed by histological examination of the
degree of inflammatory changes in epidermal tissue and dermal
tissue to observe the preventive and therapeutic effects on
inflammation and photoinflammation.
[0218] Samples:
[0219] Example 6 (L-arginine+ethanolamine+simple preparation)
[0220] Comparative Example 1 (simple preparation)
[0221] Experimental Animals: Guinea pigs, 5
[0222] Test Site:
[0223] Shaved back of guinea pigs (comparison with simple
preparation)
[0224] Test Method:
[0225] The backs of the experimental animals were shaved and hair
was removed with a depilatory cream three days before irradiation
with ultraviolet light.
[0226] The test site was irradiated with ultraviolet light, and
application of samples was started immediately after
irradiation.
[0227] In order to make a histological evaluation of inflammation
caused by irradiation with ultraviolet light, biopsies were
performed with a 6 mm disposable punch on days 7 and 14 after
irradiation, the specimens were immersed in 10% neutral formalin
solution and fixed followed by preparing tissue sections.
[0228] Application Method: Simple application twice a day after
irradiation (morning and evening)
[0229] Application Period: 2 weeks
[0230] Evaluation Method:
[0231] Using keratin hyperplasia and parakeratosis as indicators of
inflammatory changes of epidermal tissue, and cellular infiltration
and vasodilation as indicators of inflammatory changes in dermal
tissue, the tissue sections were observed and evaluations were made
according to the following five levels of a severity score
(inflammation intensity).
[0232] Severity Score
[0233] 4: Advanced symptoms
[0234] 3: Moderate symptoms
[0235] 2: Mild symptoms
[0236] 1: Slight symptoms
[0237] 0: No symptoms or symptoms disappeared
[0238] Test Results:
[0239] The test results are as shown in FIGS. 17, 18, 19 and
20.
[0240] Example 6 of the present invention was clearly demonstrated
to have an effect that heals vasodilation in the early stage of the
occurrence of inflammation in dermal tissue, and was also observed
to not only have a therapeutic effect in the early stage, but also
a preventive effect that prevents full-scale onset of inflammation.
In addition, it was also clearly shown to rapidly heal cellular
infiltration, which is a symptom of inflammation in the dermis.
Furthermore, keratin hyperplasia and parakeratosis, which are
abnormalities in the epidermis accompanying inflammation, were also
observed to be alleviated.
[0241] On the basis of these findings, inflammation and
photoinflammation were clearly demonstrated to be prevented and
healed by skin conditioning.
TEST EXAMPLE 9
[0242] A 2-hour moisture retention duration test was performed on
atopic skin.
[0243] Panelists: 7 persons with atopic skin
[0244] Test Method: Same as Test Example 2 .
[0245] Measurement Method: Same as Text Example 2
[0246] Test Apparatus: Same as Test Example 2
[0247] The samples were as shown below.
[0248] Example 4 (1% L-arginine simple preparation)
13 L-arginine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0249] Make up a final amount of 100.00 g by addition of purified
water.
[0250] Example 5 (1% ethanolamine simple preparation)
14 Ethanolamine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0251] Make up a final amount of 100.00 g by addition of purified
water.
[0252] Example 6 (0.2% L-arginine +0.02% ethanolamine+simple
preparation)
15 Example 3 90.00 mL 95% Ethanol 2.00 mL Parabene 0.18 g Purified
soy bean lecithin 0.05 g
[0253] Make up a final amount of 100.00 g by addition of purified
water.
[0254] Example 11 (1% 2-methoxyethylamine simple preparation)
16 2-methoxyethylamine (Tokyo Kasei Kogyo) 1.00 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0255] Make up a final amount of 100.00 g by addition of purified
water.
[0256] Example 12 (1% O-Phosphorylethanolamine simple
preparation)
17 O-Phosphorylethanolamine (Tokyo Kasei Kogyo) 1.00 g 95% Ethanol
2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0257] Make up a final amount of 100.00 g by addition of purified
water.
[0258] Example 13 (1% 2-Ethylaminoethanol simple preparation)
18 2-Ethylaminoethanol (Tokyo Kasei Kogyo Co., Ltd) 1.00 g 95%
Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05
g
[0259] Make up a final amount of 100.00 g by addition of purified
water.
[0260] Example 14 (1% Diethanolamine simple preparation)
19 Diethanolamine (Mitsui Toatsu Chemicals) 1.00 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0261] Make up a final amount of 100.00 g by addition of purified
water.
[0262] Example 15 (1% 2-Dimethylaminoethanol simple
preparation)
20 2-Dimethylaminoethanol (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0263] Make up a final amount of 100.00 g by addition of purified
water.
[0264] Example 16 (1% Choline simple preparation)
21 Choline (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0265] Make up a final amount of 100.00 g by addition of purified
water.
[0266] Example 17 (1% 2-Amino-hydroxymethyl-1,3-propanediol simple
preparation)
22 2-Amino-hydroxymethyl-1,3-propanediol 1.00 g (Kanto Kagaku) 95%
Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05
g
[0267] Make up a final amount of 100.00 g by addition of purified
water.
[0268] Example 18 (1% Noradrenaline simple preparation)
23 Noradrenaline (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0269] Make up a final amount of 100.00 g by addition of purified
water.
[0270] Example 19 (1% Phenethylamine simple preparation)
24 Phenethylamine (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0271] Make up a final amount of 100.00 g by addition of purified
water.
[0272] Example 20 (1% Ethylenediamine simple preparation)
25 Ethylenediamine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0273] Make up a final amount of 100.00 g by addition of purified
water.
[0274] Example 21 (1% Taurine simple preparation)
26 Taurine (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0275] Make up a final amount of 100.00 g by addition of purified
water.
[0276] Example 22 (1% Phosphatidylethanolamine simple
preparation)
27 Phosphatidylethanolamine (Kanto Kagaku) 1.00 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0277] Make up a final amount of 100.00 g by addition of purified
water.
[0278] Example 23 (1% N-(2-Hydroxyethyl)acetamide simple
Preparation)
28 N-(2-Hydroxyethyl)acetamide 1.00 g (Kanto Kagaku) 95% Ethanol
2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0279] Make up a final amount of 100.00 g by addition of purified
water.
[0280] Example 24 (1% 2-(Metylamino)ethanol simple preparation)
29 2-(Metylamino)ethanol (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0281] Make up a final amount of 100.00 g by addition of purified
water.
[0282] Example 25 (1% 2-Anilinoethanol simple preparation)
30 2-Anilinoethanol (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0283] Make up a final amount of 100.00 g by addition of purified
water.
[0284] Example 26 (1% 2-(Benzylamino)ethanol simple
preparation)
31 2-(Benzylamino)ethanol (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0285] Make up a final amount of 100.00 g by addition of purified
water.
[0286] Example 27 (1% 3-Amino-1-propanol simple preparation)
32 3-Amino-1-propanol (Kanto Kagaku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0287] Make up a final amount of 100.00 g by addition of purified
water.
[0288] Example 28 (1% 2-Amino-1-butanol simple preparation)
33 2-Amino-1-butanol (Nakarai Tesuku) 1.00 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0289] Make up a final amount of 100.00 g by addition of purified
water.
[0290] Example 29 (1% Putrescine simple preparation)
34 Putrescine (Sigma Chemical) 1.00 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0291] Make up a final amount of 100.00 g by addition of purified
water.
[0292] Example 30 (1% DL-Pyroglutamic acid simple preparation)
35 DL-Pyroglutamic acid (Tokyo Kasei Kogyo) 1.00 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0293] Make up a final amount of 100.00 g by addition of purified
water.
[0294] Example 31 (1% Triethanolamine simple preparation)
36 Triethanolamine (Mitsui Toatsu Chemicals) 1.00 g 95% Ethanol
2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0295] Make up a final amount of 100.00 g by addition of purified
water.
[0296] Example 32 (Rice preparation containing 0.03%
L-arginine)
[0297] 1 kg of unpolished rice was crushed with a crusher. After
adding 3000 mL of water, 7.5 g of .alpha.-amylase, 8 g of protease
and 8 g of peptidase and heating to 55.degree. C., the mixture was
allowed to stand for 10 hours while holding at that temperature.
Next, the temperature was gradually raised and extraction was
performed by boiling for 5 minutes. After cooling to 20.degree. C.,
the mixture was press-filtered and the pH of the filtrate was
lowered to 3.3 by addition of citric acid. 8 g of acidic protease
and 8 g of acidic carboxypeptidase were added followed by allowing
to react for 10 hours at 55.degree. C.
[0298] Next, the mixture was heated to 70.degree. C. and then
filtered after cooling to obtain 2700 mL of product containing 354
mg/L of L-arginine.
[0299] Example 33 (Rice preparation containing 0.03%
L-arginine+simple preparation)
37 Example 32 (containing 90.00 mL 0.03% L-arginine from rice) 95%
Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05
g
[0300] Make up a final amount of 100.00 g by addition of purified
water.
[0301] Example 34 (1% 2-Methoxyethylamine+rice preparation
containing 0.03% L-arginine+simple preparation)
38 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Methoxyethylamine (Tokyo Kasei Kogyo) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0302] Make up a final amount of 100.00 g by addition of purified
water.
[0303] Example 35 (1% O-Phosphorylethanolamine+rice preparation
containing 0.03% L-arginine+simple preparation)
39 Example 32 (containing 90.00 mL 0.03% L-arginine from rice)
O-Phosphorylethanolamine 0.90 g (Tokyo Kasei Kogyo) 95% Ethanol
2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0304] Make up a final amount of 100.00 g by addition of purified
water.
[0305] Example 36 (1% 2-Ethylaminoethanol+rice preparation
containing 0.03% L-arginine+simple preparation)
40 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Ethylaminoethanol (Tokyo Kasei Kogyo) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0306] Make up a final amount of 100.00 g by addition of purified
water.
[0307] Example 37 (1% Diethanolamine+rice preparation containing
0.03% L-arginine+simple preparation)
41 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Diethanolamine (Mitsui Toatsu Chemicals) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0308] Make up a final amount of 100.00 g by addition of purified
water.
[0309] Example 38 (1% 2-Dimethylaminoethanol+rice preparation
containing 0.03% L-arginine+simple preparation)
42 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Dimethylaminoethanol (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0310] Make up a final amount of 100.00 g by addition of purified
water.
[0311] Example 39 (1% Choline+rice preparation containing 0.03%
L-arginine +simple preparation)
43 Example 32 (containing 90.00 mL 0.03% L-arginine from rice)
Choline (Nakarai Tesuku) 0.90 g 95% Ethanol 2.00 mL Parabene 0.18 g
Purified soy bean lecithin 0.05 g
[0312] Make up a final amount of 100.00 g by addition of purified
water.
[0313] Example 40 (1% 2-Amino-2-hydroxymethyl-1,3-propanediol+rice
preparation containing 0.03% L-arginine+simple preparation)
44 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Amino-2-hydroxymethyl-1,3-propanediol 0.90 g (Kanto Kagaku) 95%
Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin 0.05
g
[0314] Make up a final amount of 100.00 g by addition of purified
water.
[0315] Example 41 (1% Noradrenaline+rice preparation containing
0.03% L-arginine+simple preparation)
45 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Noradrenaline (Nakarai Tesuku) 0.90 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0316] Make up a final amount of 100.00 g by addition of purified
water.
[0317] Example 42 (1% Phenethylamine+rice preparation containing
0.03% L-arginine+simple preparation)
46 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Phenethylamine (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0318] Make up a final amount of 100.00 g by addition of purified
water.
[0319] Example 43 (1% Ethylenediamine+rice preparation containing
0.03% L-arginine+Simple Preparation)
47 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Ethylenediamine (Nakarai Tesuku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0320] Make up a final amount of 100.00 g by addition of purified
water.
[0321] Example 44 (1% Taurine+rice preparation containing 0.03%
L-arginine+simple preparation)
48 Example 32 (containing 90.00 mL 0.03% L-arginine from rice)
Taurine (Nakarai Tesuku) 0.90 g 95% Ethanol 2.00 mL Parabene 0.18 g
Purified soy bean lecithin 0.05 g
[0322] Make up a final amount of 100.00 g by addition of purified
water.
[0323] Example 45 (1% Phosphatidylethanolamine+rice preparation
containing 0.03% L-arginine+simple preparation)
49 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Phosphatidylethanolamine (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0324] Make up a final amount of 100.00 g by addition of purified
water.
[0325] Example 46 (1% N-(2-Hydroxyethyl)acetamide+rice preparation
containing 0.03% L-arginine+simple preparation)
50 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
N-(2-Hydroxyethyl) acetamide 0.90 g (Kanto Kagaku) 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0326] Make up a final amount of 100.00 g by addition of purified
water.
[0327] Example 47 (1% 2-(Methylamino)ethanol+rice preparation
containing 0.03% L-arginine+simple preparation)
51 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-(Methylamino) ethanol (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0328] Make up a final amount of 100.00 g by addition of purified
water.
[0329] Example 48 (1% 2-Anilinoethanol+rice preparation containing
0.03% L-arginine+simple preparation)
52 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Anilinoethanol (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0330] Make up a final amount of 100.00 g by addition of purified
water.
[0331] Example 49 (1% 2-(Benzylamino)ethanol+rice preparation
containing 0.03% L-arginine+simple preparation)
53 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-(Benzylamino)ethanol (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0332] Make up a final amount of 100.00 g by addition of purified
water.
[0333] Example 50 (1% 3-Amino-1-propanol+rice preparation
containing 0.03% L-arginine+simple preparation)
54 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
3-Amino-1-propanol (Kanto Kagaku) 0.90 g 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0334] Make up a final amount of 100.00 g by addition of purified
water.
[0335] Example 51 (1% 2-Amino-1-butanol+rice preparation containing
0.03% L-arginine+simple preparation)
55 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
2-Amino-1-butanol 0.90 g (Nakarai Tesuku) 95% Ethanol 2.00 mL
Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0336] Make up a final amount of 100.00 g by addition of purified
water.
[0337] Example 52 (1% Putrescine+rice preparation containing 0.03%
L-arginine+simple preparation)
56 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Putrescine (Sigma Chemical) 0.90 g 95% Ethanol 2.00 mL Parabene
0.18 g Purified soy bean lecithin 0.05 g
[0338] Make up a final amount of 100.00 g by addition of purified
water.
[0339] Example 53 (1% DL-Pyroglutamine acid+rice preparation
containing 0.03% L-arginine+simple preparation)
57 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
DL-Pyroglutamine acid (Tokyo Kasei Kogyo) 0.90 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0340] Make up a final amount of 100.00 g by addition of purified
water.
[0341] Example 54 (1% Triethanolamine+rice preparation containing
0.03% L-arginine+Simple Preparation)
58 Example 32 (containing 0.03% 90.00 mL L-arginine from rice)
Triethanolamine (Mitsui Toatsu Chemicals) 0.90 g 95% Ethanol 2.00
mL Parabene 0.18 g Purified soy bean lecithin 0.05 g
[0342] Make up a final amount of 100.00 g by addition of purified
water.
[0343] Comparative Example 1 (simple preparation)
59 95% Ethanol 2.00 mL Parabene 0.18 g Purified soy bean lecithin
0.05 g
[0344] Make up a final amount of 100.00 g by addition of purified
water.
[0345] Comparative Example 2 (Hyaluronic acid+simple
preparation)
60 Sodium hyaluronate 1.00 g 95% Ethanol 2.00 mL Parabene 0.18 g
Purified soy bean lecithin 0.05 g
[0346] Make up a final amount of 100.00 g by addition of purified
water.
[0347] The results of the moisture retention duration test are as
shown in FIGS. 21 through 31. With respect to atopic skin, moisture
retention effects were remarkable 15 minutes after application, and
moisture retention continued beyond 30 minutes for 2 hours.
Although continuation of moisture retention was observed with
either L-arginine or ethanolamine alone, when two kinds of
substances were present, moisture retention duration was enhanced
more than when either substance was used alone even at lower
concentrations (see Example 6 in FIG. 21).
[0348] Although Examples 34 through 54 (referred to as the
"former") are mixtures containing 0.03% L-arginine in Examples 11
through 31 (referred to as the "latter"), respectively, the former
demonstrated higher moisture retention duration than the latter
(see FIGS. 27 through 31).
TEST EXAMPLE 10
[0349] A moisture retention ability test was performed on atopic
skin.
[0350] Panelists: 4 persons with atopic skin
[0351] Measurement Method: Same as measurement method of Test
Example 3
[0352] Test Apparatus: Same as test apparatus of Test Example 2
[0353] The samples were as shown below.
[0354] Example 4 (1% L-arginine simple preparation)
[0355] Example 5 (1% Ethanolamine simple preparation)
[0356] Example 6 (0.2% L-arginine+0.02% ethanolamine+simple
preparation)
[0357] Example 11 (1% 2-Methoxyethylamine+simple preparation)
[0358] Example 14 (1% Diethanolamine simple preparation)
[0359] Example 16 (1% Choline simple preparation)
[0360] Example 17 (1% 2-Amino-2-hydroxymethyl-1,3-propanediol
simple preparation)
[0361] Example 18 (1% Noradrenaline simple preparation)
[0362] Example 34 (2-Methoxyethylamine+rice preparation containing
0.03% L-arginine +simple preparation)
[0363] Example 37 (1% Diethanolamine+rice preparation containing
0.03% L-arginine+simple preparation)
[0364] Example 39 (1% Choline+rice preparation containing 0.03%
L-arginine+simple preparation)
[0365] Example 40 (1% 2-Amino-2-hydroxymethyl-1,3-propanediol+rice
preparation containing 0.03% L-arginine+simple preparation)
[0366] Example 41 (1% Noradrenaline+rice preparation containing
0.03% L-arginine+simple preparation)
[0367] Comparative Example 1 (simple preparation)
[0368] The results of the moisture retention ability test are as
shown in FIGS. 32 through 34.
[0369] Although effects that increased moisture retention ability
for atopic skin were not observed at all for Comparative Example 1,
the moisture retention ability 2 hours after applying the samples
of the above-mentioned Examples of the present invention increase
significantly as compared with before application.
[0370] In FIG. 32, although moisture retention ability increased
with either L-arginine alone (Example 4) or ethanolamine alone
(Example 5), in the case both substances were present (Example 6),
moisture retention ability was increased more than when either
substance was used alone even at lower concentrations.
[0371] Although Examples 34 through 41 (referred to as the
"former") are mixtures of rice preparations containing 0.03%
L-arginine with Examples 11 through 18 (referred to as the
"latter"), respectively, the former demonstrated higher moisture
retention ability than the latter (FIG. 34).
[0372] In this manner, the samples of the present invention
increased the skin's barrier function by acting on the corneal
layer, and acted on epidermal keratocytes not present in the
corneal layer to produce a corneal layer having a high barrier
function.
TEST EXAMPLE 11
[0373] The amount of moisture loss from the skin (transepidermal
moisture evaporation volume) was measured to confirm barrier
function improvement effects.
[0374] Panelists: 4 persons with atopic skin
[0375] Test Method: Each sample was applied to the side of the
forearm of the panelists (approx. 0.3.times.0.3 cm) followed by
measurement of transepidermal moisture evaporation volume at 60 and
120 minutes after application.
[0376] Measurement Method:
[0377] (1) The test site is washed with soap.
[0378] (2) The test site is exposed in a constant temperature and
constant humidity room at a temperature of 20.degree. C. and
humidity of 50%, and the skin is allowed to reach a steady state by
allowing the panelists to rest quietly starting 60 minutes before
measurement.
[0379] (3) Transepidermal water loss (TEWL) at the test site is
measured for about 1 minute (the rate of moisture evaporation at
the test site is measured as TEWL (g/m.sup.2 h) automatically by
software computation by contacting a cylindrical probe of the
TEWAMETER TM210 perpendicular to the test site).
[0380] Test Apparatus:
[0381] TEWAMETER TM210 (Nippon Eurotech)
[0382] TEWAMETER Software Ver. 1.1 (Nippon Eurotech)
[0383] Samples: Same as the samples used in Test Example 10
[0384] The test results for transepidermal moisture evaporation
volume are as shown in FIGS. 35 through 37.
[0385] The amount of moisture loss is greater in atopic skin prior
to application of the samples of the present invention as compared
with healthy skin due to a decrease in the skin's barrier function.
The amount of moisture loss was decreased nearly to the level of
healthy skin following application of the samples of the present
invention to atopic skin for 4 weeks, and the skin's barrier
mechanism and function were determined to have been improved.
[0386] Although Examples 34 through 41 (referred to as the
"former") are mixtures of rice preparations containing 0.03%
L-arginine with Examples 11 through 18 (referred to as the
"latter"), respectively, the former demonstrated greater effects
that reduced the amount of moisture loss than the latter (FIG.
37).
[0387] In this manner, impairment of the skin's barrier mechanism
and function was improved, and internal moisture loss was inhibited
by applying the samples of the present invention to atopic
skin.
TEST EXAMPLE 12
[0388] An allergic reaction inhibition test was conducted in house
dust-sensitized model animals (guinea pigs).
[0389] Experimental Animals: Guinea pigs, 6
[0390] Test Method:
[0391] (1) House dust extract and adjuvant were mixed and injected
subcutaneously into the guinea pigs to sensitize.
[0392] (2) After sensitization was established, the abdomens of the
guinea pigs were shaved to produce chapped skin.
[0393] (3) The samples were applied to the site where chapped skin
was produced.
[0394] (4) House dust extract was applied to the sample application
site.
[0395] (5) Skin reaction was evaluated for 1-5 days after step
(4).
[0396] Evaluation of the induced skin reaction (dermatitis) was
scored based on the following-standards.
[0397] 0: No reaction
[0398] 1: Mild erythema
[0399] 2: Moderate erythema
[0400] 3: Serious erythema
[0401] 4: Serious erythema accompanied by edema
[0402] The samples were as shown below
[0403] Example 55 (simple preparation containing 40% Example 3)
61 Example 32 (containing 0.2% 40.00 mL L-arginine and 0.02%
ethanolamine from rice) 95% Ethanol 2.00 mL Parabene 0.18 g
Purified soy bean lecithin 0.05 g
[0404] Make up a total amount of 100.00 g by addition of purified
water.
[0405] Comparative Example 1 (simple preparation)
[0406] The results of the allergic reaction inhibition test in
house dust-sensitized model animals (guinea pigs) are shown in FIG.
38.
[0407] When a sample of the present invention was applied to house
dust-sensitized guinea pig skin in which chapped skin had been
produced artificially followed by reapplication of house dust, the
degree of house dust extract-induced dermatitis was inhibited over
the course of 5 days after application.
[0408] In this manner, skin in which impairment of the skin's
barrier mechanism and function was improved by application of a
sample of the present invention was able to prevent infiltration of
antigen from the outside and inhibit dermatitis.
TEST EXAMPLE 13
[0409] A clinical test was conducted on atopic skin of patients
with atopic dermatitis.
[0410] Panelists: 12 patients with atopic dermatitis
[0411] Test Sites:
[0412] The test sites consisted of sites having symptoms suitable
for evaluation that enabled comparison of a site using Example 8
and a site using Comparative Example 5 either to the, left and
right or above and below.
[0413] External Application Method:
[0414] Simple application at each site separately for Example 8 and
Comparative Example 5 twice per day (morning and evening).
[0415] Application Period: 4 weeks
[0416] Evaluation Items:
[0417] Evaluation items consisted of the main symptoms of atopic
skin.
[0418] (1) Skin dryness
[0419] (2) Scaling
[0420] (3) Itchiness
[0421] Evaluation Method:
[0422] The results of the site where Example 8 was applied were
evaluated for the evaluation items according to the following four
levels of a severity score as determined by visual examination.
[0423] 3: Advanced symptoms
[0424] 2: Moderate symptoms
[0425] 1: Mild symptoms
[0426] 0: No symptoms or symptoms disappeared
[0427] In addition, improvement (usefulness) of effects as compared
with Comparative Example 5 was evaluated each week according to the
following four levels:
[0428] Extremely useful
[0429] Useful
[0430] Somewhat useful
[0431] Not useful
[0432] Finally, the usefulness of the present invention was
evaluated in terms of the overall usefulness throughout the usage
period.
[0433] The samples were as shown below.
[0434] Example 8 (Example 3+cream preparation)
62 Example 3 (containing 0.2% L-arginine and 0.02% 40.00 mL
ethanolamine from rice) Dipotassium glycyrrhetinate 0.10 g
1,3-Butyleneglycol 6.00 g Concentrated glycerin 6.00 g
Methylpolysiloxane 6.00 g Stearic acid 3.00 g Cetanol 3.00 g Cetyl
2-Ethylhexanoate 6.00 g Squalene 6.00 g Sucrose fatty acid ester
3.00 g dl-.alpha.-Tocopherol acetate 0.30 g Sodium casein 1.50 g
Disodium edetate 0.03 g Parabene 0.30 g
[0435] Make up a final amount of 100.00 g by addition of purified
water.
[0436] Comparative Example 5 (cream preparation)
63 Dipotassium glycyrrhetinate 0.10 g 1,3-Butyleneglycol 6.00 g
Concentrated glycerin 6.00 g Methylpolysiloxane 6.00 g Stearic acid
3.00 g Cetanol 3.00 g Cetyl 2-ethylhexanoate 6.00 g Squalene 6.00 g
Sucrose fatty acid ester 3.00 g dl-.alpha.-Tocopherol acetate 0.30
g Sodium casein 1.50 g Disodium edetate 0.03 g Parabene 0.30 g
[0437] Make up a final amount of 100.00 g by addition of purified
water.
[0438] Test Results:
[0439] When a sample of the present invention and Comparative
Example 5 were respectively used on skin susceptible to the
induction of dermatitis (atopic skin) located near to the affected
area of atopic dermatitis patients, in contrast to Comparative
Example 5 being completely ineffective, the present invention
demonstrated a high degree of usefulness.
[0440] FIGS. 39 through 42 show the changes in severity scores of
skin dryness, scaling and itchiness. According to these results,
the present invention alleviated skin symptoms such as skin
dryness, scaling and itchiness associated with atopic dermatitis,
and was observed to demonstrate a high degree of usefulness against
each of these symptoms. There were no adverse side effects observed
and a high degree of safety was observed.
[0441] Since the present invention has remarkable effects against
itchiness, the vicious circle of itchiness leading to scratching,
scratching leading to increased itchiness, and further scratching
leading to exacerbation of atopic dermatitis can be terminated,
thereby making it possible to prevent the onset and exacerbation of
atopic dermatitis. In addition, as a result of being freed from
itchiness, the present invention also has effects on the mental
state of atopic dermatitis patients.
[0442] In this manner, the present invention is able to improve
skin symptoms of skin dryness, scaling and itchiness observed in
atopic skin, thereby being able to prevent the onset and
exacerbation of atopic dermatitis, by restoring the skin's barrier
mechanism and function through. conditioning of the skin. TEST
EXAMPLE 14
[0443] A clinical test was conducted on the affected skin of atopic
dermatitis patients to observe the therapeutic effects on atopic
dermatitis as a result of skin conditioning and restoration of the
skin's barrier mechanism and function.
[0444] Panelists: 7 patients with atopic dermatitis
[0445] Samples: Sample as in the case of Test Example 13.
[0446] Example 8 (Example 3+cream preparation)
[0447] Comparative Example 5 (cream preparation)
[0448] Test Sites:
[0449] The test sites consisted of sites having symptoms suitable
for evaluation that enabled comparison of a site using Example 8
and a site using Comparative Example 5 either to the left and right
or above and below.
[0450] External Application Method:
[0451] Simple application at each site separately for Example 8 and
Comparative Example 5 twice per day (morning and evening).
[0452] Application Period: 4 weeks
[0453] Evaluation Items:
[0454] Evaluation items consisted of the following:
[0455] (1) Itchiness
[0456] (2) Dry marks
[0457] (3) Erythema
[0458] (4) Lichenification
[0459] Evaluation Method:
[0460] The results of the site where Example 8 was applied were
evaluated for the evaluation items according to the following four
levels of a severity score as determined by visual examination.
[0461] 3: Advanced symptoms
[0462] 2: Moderate symptoms
[0463] 1: Mild symptoms
[0464] 0: No symptoms or symptoms disappeared
[0465] In addition, improvement (usefulness) of effects as compared
with Comparative Example 5 was evaluated each week according to the
following four levels:
[0466] Extremely useful
[0467] Useful
[0468] Somewhat useful
[0469] Not useful
[0470] Finally, the usefulness of the present invention was
evaluated in terms of the overall usefulness throughout the usage
period.
[0471] Test Results:
[0472] When a sample of the present invention and Comparative
Example 5 were respectively used on atopic dermatitis patients, in
contrast to Comparative Example 5 being completely ineffective, the
present invention demonstrated a high degree of usefulness as shown
in FIGS. 43 through 46.
[0473] FIGS. 43 through 46 show the changes in severity scores of
itchiness, dry marks, erythema and lichenification at the site of
use of Example 8 of the present invention. According to these
results, the present invention alleviated skin symptoms such as
itchiness, dry marks, erythema and lichenification associated with
atopic dermatitis, and was observed to demonstrate a high degree of
usefulness against each of these symptoms. There were no adverse
side effects, rebound phenomena were not observed following
discontinuation of use, and there were no cases of recurrence.
[0474] Since the present invention has remarkable effects against
itchiness, the vicious circle of itchiness leading to scratching
and scratching leading to exacerbation of atopic dermatitis can be
terminated, and it is possible to prevent the onset and
exacerbation of atopic dermatitis. In addition, as a result of
being freed from itchiness, the present invention also has effects
on the mental state of atopic dermatitis patients.
[0475] In this manner, the present invention is able to improve
skin symptoms of itchiness, dry marks, erythema and lichenification
observed in atopic dermatitis, thereby being able to heal this
disease, through conditioning of the skin.
TEST EXAMPLE 15
[0476] A clinical test was conducted on the affected skin of atopic
dermatitis patients to observe the therapeutic effects on atopic
dermatitis as a result of skin conditioning and restoration of the
skin's barrier mechanism and function.
[0477] Panelists: 5 patients with atopic dermatitis
[0478] Samples:
[0479] Example 56 (1% Ethanolamine+cream preparation)
64 Ethanolamine (Nakarai Tesuku) 1.00 g Dipotassium glycyrrhetinate
0.10 g 1,3-Butyleneglycol 6.00 g Concentrated glycerin 6.00 g
Methylpolysiloxane 6.00 g Stearic acid 3.00 g Cetanol 3.00 g Cetyl
2-ethylhexanoate 6.00 g Squalene 6.00 g Sucrose fatty acid ester
3.00 g dl-.alpha.-Tocopherol acetate 0.30 g Sodium casein 1.50 g
Disodium edetate 0.03 g Parabene 0.30 g
[0480] Make up a final amount of 100.00 g by addition of purified
water.
[0481] Comparative Example 5 (cream preparation)
[0482] Test Sites:
[0483] The test sites consisted of sites having symptoms suitable
for evaluation that enabled comparison of a site using Example 56
and a site using Comparative Example 5 either to the left and right
or above and below.
[0484] External Application Method:
[0485] Simple application at each site separately for Example 56
and Comparative Example 5 twice per day (morning and evening).
[0486] Application Period: 4 weeks
[0487] Evaluation Items: Same as Test Example 13.
[0488] Evaluation Method: Same as Test Example 13.
[0489] Test Results:
[0490] When Example 56 of the present invention and Comparative
Example 5 were respectively used on atopic dermatitis patients, in
contrast to Comparative Example 5 being completely ineffective,
Example 56 of the present invention demonstrated a high degree of
usefulness as shown in FIGS. 47 through 50.
[0491] FIGS. 47 through 50 show the changes in severity scores of
itchiness, dry marks, erythema and lichenification at the site of
use of Example 56 of the present invention. According to these
results, Example 56 of the present invention alleviated skin
symptoms such as itchiness, dry marks, erythema and lichenification
associated with atopic dermatitis, and was observed to demonstrate
a high degree of usefulness against each of these symptoms. There
were no adverse side effects, rebound phenomena were not observed
following discontinuation of use, and there were no cases of
recurrence.
[0492] Since the present invention has remarkable effects against
itchiness, the vicious circle of itchiness leading to scratching
and scratching leading to exacerbation of atopic dermatitis can be
terminated, and it is possible to prevent the onset and
exacerbation of atopic dermatitis. In addition, as a result of
being freed from itchiness, the present invention also has effects
on the mental state of atopic dermatitis patients.
[0493] In this manner, the present invention is able to improve
skin symptoms of itchiness, dry marks, erythema and lichenification
observed in atopic dermatitis, thereby being able to heal this
disease, through conditioning of the skin.
[0494] The moisture retention agent used in the present invention
contains one or more kinds of substances selected from the group
consisting of polyvalent alcohols represented by glycerin,
dipropyleneglycol and 1,3-butyleneglycol; sugars represented by
sorbitol, maltitol, dextrin, hyaluronic acid and chitosan;
mucopolysaccharides and sugar derivatives; polypeptides represented
by elastin and collagen; organic acids and their salts represented
by pyrrolidone carboxylic acid, citric acid and lactic acid;
biopharmaceutical and natural moisture retention agents represented
by refined rice wine, rice bran, aloe, glycyrrhizac radix and
chamomile; bio-component moisture retention agents represented by
vitamins, placental extract, urea, lecithins, phospholipids,
ceramides, cholesterols and sphingolipids; and, vegetable extracts,
fruit extracts, kelp extracts, enzymes and inorganic salts; and, is
one or more substances selected from the group consisting of animal
oils, vegetable oils, hydrocarbons, higher alcohols and esters.
[0495] Drugs that can be used in pharmaceuticals, quasi-drugs and
cosmetics which are externally applied skin preparations as claimed
in the present invention are one or more kinds of substances
selected from the group consisting of bactericidal drugs, wound
protective agents, wound healing agents, drugs for suppurative
diseases, analgesic, anti-itching, astringent and antiphlogistic
agents, immunosuppresants, drugs for parasitic skin diseases, skin
softeners, hair agents, vitamin agents and biopharmaceuticals,
while the bases are one or more kinds of substances selected from
the group consisting of moisture retention agents, astringents,
refrigerants, antioxidants, ultraviolet absorbers, infrared
dispersants, preservatives, antibiotics, chelating agents,
surfactants, foaming agents, stabilizers, penetrants, assistants,
pH adjusters, buffers, emulsifiers, opacefiers, fragrances and
pigments.
[0496] The dry skin symptoms which are targets of the present
invention are symptoms selected from atopic skin, dry or rough
skin, aged skin, ichthyosis, dry skin, chapped skin, asteatosis,
xeroderma, dry eczema, facial dry eczema and progressive volar
keratoderma, and/or selected from erythema, sclerosis and
cornification, cracking, scaling, wrinkles, itching and dry marks,
while skin aging symptoms are selected from wrinkles and decreased
skin tightness and elasticity, skin damage caused by ultraviolet
rays is selected from spots and freckles, skin disorders arising
from the epidermis are selected from turnover abnormalities,
fineness and moistness, physicochemical skin disorders are selected
from cuts, burns and floor burns, biological skin disorders are
selected from athlete's foot and skin infections, while dermatitis
and eczema are inflammatory cornification disorders
(psoriasis).
[0497] The present invention demonstrates remarkable effectiveness
in the prevention and treatment of skin diseases such as atopic
dermatitis, dry skin symptoms, pruritis, frostbite, cracking,
chapped skin, skin aging symptoms, skin damage caused by
ultraviolet rays, darkening, blackening, skin disorders arising in
the epidermis, physicochemical skin disorders, skin symptoms caused
by the use of water, soap, detergents, surfactants or solvents,
adverse side effects of externally applied skin preparations,
biological skin disorders, dermatitis, eczema and other skin
diseases.
[0498] Industrial Applicability
[0499] The present invention relates to a skin conditioner
comprising the compound represented by the general formula: 2
[0500] (wherein, the symbols are the same as those defined in the
text). Examples of active ingredients of the present invention
include L-arginine and ethanolamine. These active ingredients can
be acquired as chemical synthesis products, or they may also be
acquired in the form of natural substances. Preferable Examples of
natural substances include substances containing L-arginine and/or
ethanolamine obtained from rice. The skin conditioner as claimed in
the present invention demonstrates remarkable effectiveness as an
agent for the prevention and treatment of atopic dermatitis and as
a skin moisture retention agent.
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