WO2023068090A1 - たるみ毛穴改善剤 - Google Patents
たるみ毛穴改善剤 Download PDFInfo
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- WO2023068090A1 WO2023068090A1 PCT/JP2022/037698 JP2022037698W WO2023068090A1 WO 2023068090 A1 WO2023068090 A1 WO 2023068090A1 JP 2022037698 W JP2022037698 W JP 2022037698W WO 2023068090 A1 WO2023068090 A1 WO 2023068090A1
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- sagging
- pore
- pores
- skin
- retinol
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/64—Proteins; Peptides; Derivatives or degradation products thereof
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/67—Vitamins
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
- A61K8/67—Vitamins
- A61K8/671—Vitamin A; Derivatives thereof, e.g. ester of vitamin A acid, ester of retinol, retinol, retinal
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/007—Preparations for dry skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
- A61Q19/08—Anti-ageing preparations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/40—Chemical, physico-chemical or functional or structural properties of particular ingredients
- A61K2800/59—Mixtures
- A61K2800/592—Mixtures of compounds complementing their respective functions
Definitions
- the present disclosure relates to a sagging pore improving agent, more specifically, a sagging pore improving agent containing glycylglycine and retinol, and a cosmetic method using the same.
- astringent lotions are intended to tighten the skin, and alcohol temporarily lowers the skin surface temperature, and organic acids and the like act to coagulate proteins. Therefore, since it temporarily tightens the skin, the load on the skin is large, and it is not a fundamental solution to conspicuous pores, and the effect is not sufficient.
- Patent Document 1 discloses glycine derivatives, aminodicarboxylic acid derivatives, acylaminodicarboxylic acid derivatives, pyrrolidinecarboxylic acid derivatives, piperidinecarboxylic acid derivatives, and hexamethyleneiminecarboxylic acid.
- Parakeratosis inhibitors and pore shrinking agents comprising one or more compounds selected from the group consisting of derivatives, ⁇ -alanine derivatives and salts of the above derivatives are disclosed.
- One object of the present disclosure is to provide a sagging pore improving agent, more specifically, a sagging pore improving agent containing glycylglycine and retinol, and to provide a cosmetic method using the same. .
- the present inventors conducted extensive research to identify ingredients that improve sagging pores, and found for the first time that a combination of glycylglycine and retinol is particularly effective in improving sagging pores. Then, a sagging pore improving agent and a cosmetic or non-therapeutic method for improving sagging pores, characterized by containing glycylglycine and retinol, were developed.
- a sagging pore improving agent containing glycylglycine and retinol A sagging pore improving agent containing glycylglycine and retinol.
- Aspect 2 The agent for improving sagging pores according to Aspect 1, containing 0.5% or more and 2.0% or less of glycylglycine.
- Aspect 3 The sagging pore improving agent according to Aspect 1 or 2, which contains 0.3 ⁇ 10 2 IU/g or more and 1.0 ⁇ 10 5 IU/g or less of retinol.
- Aspect 4 The sagging pore improving agent according to any one of aspects 1 to 3, which improves the aspect ratio of the pore shape.
- a cosmetic method comprising the step of applying the agent for improving sagging pores according to any one of aspects 1 to 8 or the external preparation for skin according to aspect 9 to the skin of a subject.
- a wrinkle reducing agent comprising glycylglycine and retinol.
- a skin elasticity improving agent containing glycylglycine and retinol.
- a skin moisturizing agent containing glycylglycine and retinol.
- sagging pores and the like can be improved by applying a composition containing a combination of glycylglycine and retinol as active ingredients to the skin.
- FIG. 1 is a graph showing changes in pore aspect ratio caused by application of the test formulations over a period of 12 weeks.
- FIG. 2 is a graph showing the change in pore area (total pore area) caused by application of the test formulation over 12 weeks.
- FIG. 3 is a graph showing the change in pore score caused by application of the test formulation over 12 weeks.
- FIG. 4 is a graph showing changes in water content (corneometer readings) caused by application of the test formulations over a period of 12 weeks.
- FIG. 5 is a graph showing the change in softness (R0: Uf (maximum suction height)) produced by application of the test formulation over a period of 12 weeks.
- R0 Uf (maximum suction height
- FIG. 6 is a graph showing changes in elasticity (R5: Ur/Ue (instantaneous return after release of negative pressure/instantaneous deformation upon suction)) produced by application of the test formulation over a 12-week period.
- FIG. 7 is a graph showing changes in questionnaire results caused by application of the test formulation over 12 weeks.
- the sagging pore improving agent contains glycylglycine and retinol as active ingredients.
- one embodiment of the present disclosure relates to a composition for improving sagging pores, which contains glycylglycine and retinol as active ingredients.
- one aspect of the present disclosure relates to the use of a combination of glycylglycine and retinol in the manufacture of a pharmaceutical or cosmetic product for use in improving sagging pores.
- sagging pores refers to pores that are oval in shape. Sagging pores are tears-shaped (elliptical) pores due to sagging (decreased elasticity) of the cheeks and face line, which mainly occurs after the age of 40. In sagging pores, minor/major axis values of less than 1, especially less than 0.6, appear sagging. In addition, sagging pores are conspicuously seen on both cheeks in human facial skin.
- Glycylglycine is a glycine dipeptide represented by the chemical formula NH 2 CH 2 CONHCH 2 COOH, and is one of peptides with a simple structure. Glycylglycine is commercially available in high purity and readily available.
- the agent for improving sagging pores preferably contains 0.05% or more and 3.0% or less, more preferably 0.5% or more and 2.0% or less, of glycylglycine.
- the percentage (%) in this specification refers to % by mass unless otherwise specified.
- Retinol is one of the fat-soluble vitamins represented by the chemical formula C20H30O , and is also known as vitamin A1. High-purity products are commercially available and readily available.
- the sagging pore improvement agent preferably contains retinol in an amount of 1.0 IU/g or more and 5 ⁇ 10 5 IU/g or less, and 0.3 ⁇ 10 2 IU/g or more and 1.0 ⁇ 10 5 IU/g.
- IU stands for international unit.
- the sagging pore improver according to the present disclosure is used as a composition to improve the aspect ratio of pore shape.
- the aspect ratio is defined as "minor axis/major axis", and when the value increases and approaches 1 (e.g., when the aspect ratio value changes from 0.6 to 0.7 ), and the aspect ratio is evaluated as improved.
- improvement of sagging pores means that the shape of the pores becomes closer to a perfect circle.
- the shape and size of pores can be evaluated, for example, by a three-dimensional measurement method for pores as described in Japanese Patent No. 4286724.
- the sagging pore improver according to the present disclosure is used as a composition for reducing pore size.
- a composition for reducing pore size For example, when the length of the slack pore in the longitudinal direction is reduced, the size of the pore is reduced and the aspect ratio of the pore is improved.
- the pore size can also be evaluated, for example, by image analysis using a skin image diagnostic device (eg, Visia Evolution manufactured by Canfield Scientific).
- Pores can be evaluated, as described above, by a three-dimensional measurement method for pores that enables precise measurement of the three-dimensional shape of pores, for example, as described in Japanese Patent No. 4286724. Briefly, first, a replica of the skin surface condition is collected and measured using a confocal microscope to obtain three-dimensional shape measurement data of the replica. Next, correction processing such as noise removal is performed, and then processing for extracting pores from the noise-removed data is performed. Next, processing may be performed to remove information about the texture of the skin in the pore portion from the extracted pore data. Then, pore evaluation can be performed based on the pore 3D analysis data obtained as described above.
- Pores can also be evaluated by image analysis using a skin image diagnostic device (eg, Visia Evolution manufactured by Canfield Scientific, etc.), as described above.
- a skin image diagnostic device eg, Visia Evolution manufactured by Canfield Scientific, etc.
- the sagging pore improver according to the present disclosure is used as a composition for improving wrinkles.
- a composition for use in improving wrinkles comprising glycylglycine and retinol as active ingredients.
- one aspect of the present disclosure also relates to anti-wrinkle agents comprising glycylglycine and retinol.
- one aspect of the present disclosure relates to the use of a combination of glycylglycine and retinol in the manufacture of a medicament or cosmetic for use in improving wrinkles.
- the evaluation of wrinkles can be performed, for example, by image analysis using a skin image diagnostic device (eg, Visia Evolution manufactured by Canfield Scientific), observation by a skilled person, and visual judgment.
- the sagging pore improver according to the present disclosure is used as a composition for improving skin elasticity.
- a composition for use in improving firmness comprising glycylglycine and retinol as active ingredients. That is, one aspect of the present disclosure also relates to a skin elasticity improving agent containing glycylglycine and retinol. From another aspect, one aspect of the present disclosure relates to the use of a combination of glycylglycine and retinol in the manufacture of a pharmaceutical or cosmetic product for use in improving firmness.
- the elasticity of the skin can be evaluated, for example, by measuring the viscoelasticity of the skin using a commercially available device (for example, Cutometer manufactured by Courage+Khazaka).
- the sagging pore improver according to the present disclosure is used as a composition for improving skin moisturization.
- a composition for use in improving skin moisturization comprising glycylglycine and retinol as active ingredients. That is, one aspect of the present disclosure also relates to a skin moisturizing agent containing glycylglycine and retinol. From another aspect, one aspect of the present disclosure relates to the use of a combination of glycylglycine and retinol in the manufacture of a medicament or cosmetic for use in improving skin moisturization.
- the moisturizing property of the skin can be evaluated, for example, by measuring the moisture content of the stratum corneum using a commercially available device (eg, Corneometer manufactured by Courage+Khazaka).
- the present invention relates to an external skin preparation comprising a sagging pore improving agent according to the present disclosure.
- the topical skin preparation can be prepared as a cosmetic, quasi-drug, or pharmaceutical.
- Cosmetics can be sunscreens, lotions, serums, beauty creams, aftercare lotions, sun oils, etc., but can be any cosmetics as long as they are applied to the skin.
- external skin preparations include external solids, external powders, external liquids, liniments, sprays, external aerosols, pump sprays, ointments, creams, gels, patches, tapes, poultices, etc. It can be prepared in any form.
- the sagging pore improving agent or skin preparation for external use according to the present disclosure can be appropriately blended with arbitrary compounding ingredients used in cosmetics, pharmaceuticals, etc., as necessary, as long as the effects are not impaired.
- the optional ingredients include oils, surfactants, powders, colorants, water, alcohols, thickeners, chelating agents, silicones, antioxidants, UV absorbers, moisturizers, fragrances, and various medicinal effects.
- Other ingredients may include, for example, other anti-inflammatory ingredients, whitening ingredients, and the like.
- creams contain, in addition to glycylglycine and retinol, water, alcohol, humectants, thickeners, film-forming agents, activators, oils, stabilizers, percutaneous absorption inhibitors, coloring agents, chelating agents, Buffers, preservatives, flavoring agents and the like may be included.
- the present invention relates to a cosmetic or non-therapeutic method comprising applying a sagging pore improving agent according to the present disclosure, a topical skin preparation according to the present disclosure to the skin of a subject.
- the subject can be a mammal, but is preferably human.
- the sagging pore improving agent or skin external preparation disclosed herein improves sagging pores, improves the aspect ratio of the pore shape, reduces the pore size, improves wrinkles, It can be used in cosmetic or non-therapeutic methods to improve skin elasticity or to improve skin moisturization.
- the external preparation for skin is applied to the site where the desired effect is desired, such as the face, neck, hands, arms, legs, and the like.
- Application can be in any manner, including application by hand, applicator, and the like.
- the number, frequency, amount, etc., of application are appropriately set according to the desired effect and the like.
- the cosmetic or non-therapeutic method according to the present disclosure does not include so-called medical practice.
- one aspect of the present disclosure is to improve sagging pores, improve aspect ratio of pore shape, reduce pore size, improve wrinkles, improve skin elasticity. , or the use of a combination of glycylglycine and retinol to improve skin moisturization.
- the data disclosed herein demonstrate that application of a composition comprising a combination of glycylglycine and retinol to the skin improves sagging pores leading to improved skin elasticity, moisture retention and wrinkles. showing.
- compositions containing a combination of glycylglycine and retinol can be used to prepare topical skin preparations and other compositions for use in improving sagging pores and the like.
- one aspect of the present disclosure is to improve sagging pores, to improve the aspect ratio of the shape of pores, to reduce the size of pores, to improve wrinkles, to improve skin elasticity. , or the use of a combination of glycylglycine and retinol in the preparation of a topical skin preparation for improving skin moisturization.
- Example 1 Outline of continuous use effect test of cream containing glycylglycine + retinol (purpose) For the purpose of "improving sagging pores", for which no active ingredients existed so far, we conducted a continuous use effect test of a cream containing glycylglycine and retinol. (Method) A glycylglycine + retinol combination cream expected to be effective for sagging pores was applied to 19 subjects for 12 weeks, and pore shape and skin parameters were evaluated. The cream used contained 1.6% glycylglycine and 0.2 ⁇ 10 4 IU/g retinol.
- the amount to be used at one time was 0.2 g (0.1 g for each of the left and right cheeks), and was used once in the morning and once at night. (result)
- VISIA cheek replicas and skin imaging diagnostic equipment
- the application of the test formulation significantly improved the degree of sagging of pores (aspect ratio) and significantly reduced the area of some pores.
- the moisture content of the stratum corneum increased, the elasticity increased, and the skin condition improved.
- Example 2 Test Protocol (Subjects) A test was conducted on 19 males and females (14 females, 5 males, 51.1 ⁇ 5.7 years old) (mean ⁇ SD) suffering from sagging pores in their 40s and above. (Continuous use period) A cream formulation containing 1.6% glycylglycine and 0.2 ⁇ 10 4 IU/g retinol was continuously applied to both cheeks for 12 weeks (measurements were taken after 0, 4, 8 and 12 weeks). (Measurement item) Measurement items included the degree and size of pore sagging (replica), stratum corneum water content, viscoelasticity (elasticity, softness), appearance image, and the like. In the evaluation of pores using a replica, as described in Japanese Patent No.
- a replica of the skin surface condition is collected and measured using a confocal microscope to obtain three-dimensional shape measurement data of the replica.
- SILFLO Amic Group
- the moisture content and viscoelasticity (elasticity, softness) of the stratum corneum can be measured by commercially available instruments such as Corneometer (CM825) and Cutometer (MPA580). ,It was measured).
- Commercially available equipment such as VISIA Evolution can be used to analyze appearance images.
- the significance test of the measured values was performed using the paired t-test when the measured values followed the normal distribution, and using the Wilcoxon signed rank test when the measured values did not follow the normal distribution. 05.
- Example 4 Results of Analysis from VISIA Images As a result of analysis of appearance images obtained with VISIA, as shown in Table 1 and FIG. . These results demonstrate that a composition comprising glycylglycine and retinol can be used for pore size reduction and wrinkle improvement.
- Example 5 Results of Analysis of Measuring Instrument Data
- Table 2 results of analysis of stratum corneum moisture content, softness, and elasticity obtained with the measuring instrument are shown in Table 2 below and FIGS. , there was a significant improvement or trend towards improvement in resilience ( * represents p ⁇ 0.05, ** p ⁇ 0.01, *** represents p ⁇ 0.001 significance level).
- Example 6 Results of Questionnaire to Subjects As shown in FIG. 7, the results of a questionnaire to the subjects also showed that the pores tended to improve.
- the stacked graph on the left side of FIG. 7 shows that the total of the responses to the questionnaire item “Pores are less noticeable” exceeds 80% after 12 weeks, with the total of “I think so” and “I think so”. there is
- the graph on the right shows the results of quantifying the responses and analyzing the averages. From this graph as well, it can be seen that the feeling that pores have become less noticeable has increased significantly.
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Abstract
Description
[態様1]グリシルグリシンとレチノールを含む、たるみ毛穴改善剤。
[態様2]グリシルグリシンを0.5%以上2.0%以下含む、態様1記載のたるみ毛穴改善剤。
[態様3]レチノールを0.3×102IU/g以上1.0×105IU/g以下含む、態様1または2記載のたるみ毛穴改善剤。
[態様4]毛穴の形状の縦横比を改善する、態様1~3のいずれか一項記載のたるみ毛穴改善剤。
[態様5]毛穴の大きさを縮小させる、態様1~4のいずれか一項記載のたるみ毛穴改善剤。
[態様6]シワを改善する、態様1~5のいずれか一項記載のたるみ毛穴改善剤。
[態様7]肌の弾力を改善する、態様1~6のいずれか一項記載のたるみ毛穴改善剤。
[態様8]肌の保湿性を改善する、態様1~7のいずれか一項記載のたるみ毛穴改善剤。
[態様9]態様1~8のいずれか一項記載のたるみ毛穴改善剤を含む皮膚外用剤。
[態様10]態様1~8のいずれか一項記載のたるみ毛穴改善剤または態様9記載の皮膚外用剤を対象の皮膚に適用する工程を含む、美容方法。
[態様11]
グリシルグリシンとレチノールを含む、シワ改善剤。
[態様12]
グリシルグリシンとレチノールを含む、肌弾力改善剤。
[態様13]
グリシルグリシンとレチノールを含む、肌保湿性改善剤。
本開示の一つの態様において、本開示に従うたるみ毛穴改善剤は、グリシルグリシンとレチノールを有効成分として含む。別の観点からは、本開示の一つの態様は、グリシルグリシンとレチノールを有効成分として含む、たるみ毛穴の改善に用いるための組成物に関する。さらに別の観点からは、本開示の一つの態様は、たるみ毛穴の改善に用いるための薬剤または化粧品の製造における、グリシルグリシンとレチノールの組み合わせの使用に関する。
グリシルグリシン(Glycylglycine)は、化学式NH2CH2CONHCH2COOHで表されるグリシンのジペプチドであり、単純な構造のペプチドの一つである。グリシルグリシンは、高純度のものが市販されており、容易に入手可能である。
レチノールは、化学式 C20H30Oで表される脂溶性ビタミンの一つで、ビタミンA1としても知られる。高純度のものが市販されており、容易に入手可能である。
一つの態様において、本開示に従うたるみ毛穴改善剤は、毛穴の形状の縦横比を改善するための組成物として使用される。本開示の文脈において、縦横比は「短軸/長軸」として定義され、値が増加して1に近づく場合(例えば、縦横比の値が0.6から0.7に変化したような場合)、縦横比が改善したと評価される。つまり、たるみ毛穴が改善されるとは、毛穴の形状が、より正円に近づくことを言う。なお、毛穴の形状や大きさは、例えば、特許第4286724号に記載されるような、毛穴の三次元測定方法により評価することができる。
一つの態様において、本開示に従うたるみ毛穴改善剤は、シワを改善するための組成物として使用される。よって、本開示の一つの態様は、グリシルグリシンとレチノールを有効成分として含む、シワの改善に用いるための組成物に関する。すなわち、本開示の一つの態様は、グリシルグリシンとレチノールを含む、シワ改善剤にも関する。また、別の観点からは、本開示の一つの態様は、シワの改善に用いるための薬剤または化粧品の製造における、グリシルグリシンとレチノールの組み合わせの使用に関する。なお、シワの評価は、例えば、肌画像診断装置(例えば、Canfield Scientific社製Visia Evolutionなど)を用いた画像解析や、熟練者による観察、視覚判定により行うことができる。
一つの態様において、本開示に従うたるみ毛穴改善剤は、肌の弾力(ハリ)を改善するための組成物として使用される。よって、本開示の一つの態様は、グリシルグリシンとレチノールを有効成分として含む、弾力(ハリ)の改善に用いるための組成物に関する。すなわち、本開示の一つの態様は、グリシルグリシンとレチノールを含む、肌弾力改善剤にも関する。また、別の観点からは、本開示の一つの態様は、弾力(ハリ)の改善に用いるための薬剤または化粧品の製造における、グリシルグリシンとレチノールの組み合わせの使用に関する。なお、肌の弾力は、例えば、市販の機器(例えば、Courage+Khazaka社製 Cutometerなど)を用いて皮膚の粘弾性測定を測定することにより評価することができる。
一つの態様において、本開示に従うたるみ毛穴改善剤は、肌の保湿性を改善するための組成物として使用される。よって、本開示の一つの態様は、グリシルグリシンとレチノールを有効成分として含む、肌の保湿性の改善に用いるための組成物に関する。すなわち、本開示の一つの態様は、グリシルグリシンとレチノールを含む、肌保湿性改善剤にも関する。また、別の観点からは、本開示の一つの態様は、肌の保湿性の改善に用いるための薬剤または化粧品の製造における、グリシルグリシンとレチノールの組み合わせの使用に関する。なお、肌の保湿性は、例えば、市販の機器(例えば、Courage+Khazaka社製Corneometerなど)を用いて角層水分量を測定することにより評価することができる。
一つの態様において、本発明は、本開示に従うたるみ毛穴改善剤を含む皮膚外用剤に関する。一部の態様において、皮膚外用剤は、化粧品、医薬部外品、または医薬品として調製されうる。化粧品は、日焼け止め、化粧水、美容液、美容クリーム、アフターケアローション、サンオイルなどでありうるが、皮膚に適用されるものであれば任意の化粧品でありうる。
一つの態様において、本発明は、本開示に従うたるみ毛穴改善剤、本開示に従う皮膚外用剤を対象の皮膚に適用する工程を含む、美容方法または非治療的方法に関する。対象は、哺乳動物でありうるが、好適にはヒトである。
さらに、本開示の一つの態様は、たるみ毛穴を改善するため、毛穴の形状の縦横比を改善するため、毛穴の大きさを縮小させるため、シワを改善するため、肌の弾力を改善するため、または肌の保湿性を改善するための、グリシルグリシンとレチノールの組み合わせの使用に関する。本明細書に開示のデータは、グリシルグリシンとレチノールの組み合わせを含む組成物を肌に適用することによって、たるみ毛穴が改善され、肌の弾力性、保湿性、シワの改善が導かれることを示している。よって、グリシルグリシンとレチノールの組み合わせを含む組成物を用いて、たるみ毛穴改善等に使用するための皮膚外用剤や他の組成物を調製することができる。すなわち、本開示の一つの態様は、たるみ毛穴を改善するため、毛穴の形状の縦横比を改善するため、毛穴の大きさを縮小させるため、シワを改善するため、肌の弾力を改善するため、または肌の保湿性を改善するための皮膚外用剤の製造におけるグリシルグリシンとレチノールの組み合わせの使用にも関する。
(目的)
これまで有効成分が存在しない「たるみ毛穴の改善」を目的として、グリシルグリシン+レチノール配合クリームによる連用効果試験を行った。
(方法)
19名の被験者を対象に、たるみ毛穴への効果が期待されるグリシルグリシン+レチノール配合クリームを12週間塗布し、毛穴形状ならびに肌パラメータを評価した。使用したクリームには、1.6%グリシルグリシンと0.2×104IU/gレチノールが含まれていた。1回の使用量は0.2g(左右の頬に0.1gずつ)とし、朝晩1回ずつの使用とした。
(結果)
頬部レプリカや肌画像診断装置(VISIA)を用いた解析の結果、試験製剤の適用により、毛穴のたるみ度(縦横比)は有意に改善し、毛穴面積も一部有意に縮小した。また、角層水分量は上昇、弾力も上昇し肌状態も良好になった。
(被験者)
40代以降のたるみ毛穴に悩んでいる男女19名(女性14名、男性5名、51.1±5.7歳)(平均±SD)を対象に試験を行った。
(連用期間)
1.6%グリシルグリシンと0.2×104IU/gレチノールを配合したクリーム製剤を両頬部に12週間連用した(0、4、8、12週間後に測定を実施)。
(測定項目)
毛穴のたるみ度と大きさ(レプリカ)、角層水分量、粘弾性(弾力、柔らかさ)、外観画像等を測定項目とした。なお、レプリカを用いた毛穴の評価は、特許第4286724号に記載のように、皮膚表面状態を採取したレプリカを採取し、共焦点顕微鏡を用いて計測することによりレプリカの三次元形状計測データを求めることができる。レプリカの基材にはSILFLO(アミックグループ)を使用することができる。角層水分量と粘弾性(弾力、柔らかさ)はCorneometer(CM825)、Cutometer(MPA580)などの市販の機器により測定することができる(Cutometerはプローブ径が2mmのものを用い、400mbarで吸引し、測定した)。外観画像の解析にはVISIA Evolutionなどの市販の機器を使用することができる。なお、測定値の有意差検定は、測定値が正規分布に従う場合は対応あるt検定を、従わない場合はウィルコクソン順位和符号付検定(Wilcoxon signed rank test)を用いて行い、有意水準は0.05とした。
試験製剤適用開始から0、4、8、12週間後に取得した毛穴レプリカの3D解析を行い、統計的に解析した結果、毛穴縦横比(平均値)に有意な改善(8週間後ではp<0.001)が見られることが判明した(図1)。また、毛穴面積(平均値)も、有意ではないものの(p=0.11)、毛穴の面積に縮小の傾向が見られた(図2)。これらの結果は、たるみ毛穴の改善、毛穴の形状の縦横比の改善、および毛穴の大きさの縮小のために、グリシルグリシンとレチノールとを含む組成物を使用できることを実証している。
VISIAで取得した外観画像の解析の結果、以下の表1および図3に示すように、毛穴スコアとしわスコアに有意な減少または減少の傾向が見られた。これらの結果は、毛穴の大きさの縮小とシワの改善のために、グリシルグリシンとレチノールとを含む組成物を使用できることを実証している。
測定機器で取得した角層水分量および柔らかさ、弾力の解析の結果、以下の表2および図4~6に示すように、角層水分量および柔らかさ、弾力に有意な改善または改善の傾向が見られた(*はp<0.05、**はp<0.01、***はp<0.001の有意水準を表す)。これらの結果は、肌の保湿性および弾力(ハリ)の改善のために、グリシルグリシンとレチノールとを含む組成物を使用できることを実証している。
図7に示されるように、被験者に対してアンケートを行った結果でも、毛穴の改善傾向の実感が認められた。図7の左の積み上げグラフは、「毛穴が目立たなくなった」というアンケート項目の回答が12週間後では「やや思う」と「そう思う」の合計で80%を超える結果となったことを示している。右側のグラフは回答を数値化して平均を分析した結果であり、このグラフからも、毛穴が目立たなくなったとの実感が有意に増していることが見て取れる。
Claims (13)
- グリシルグリシンとレチノールを含む、たるみ毛穴改善剤。
- グリシルグリシンを0.5%以上2.0%以下含む、請求項1記載のたるみ毛穴改善剤。
- レチノールを0.3×102IU/g以上1.0×105IU/g以下含む、請求項1または2記載のたるみ毛穴改善剤。
- 毛穴の形状の縦横比を改善する、請求項1~3のいずれか一項記載のたるみ毛穴改善剤。
- 毛穴の大きさを縮小させる、請求項1~4のいずれか一項記載のたるみ毛穴改善剤。
- シワを改善する、請求項1~5のいずれか一項記載のたるみ毛穴改善剤。
- 肌の弾力を改善する、請求項1~6のいずれか一項記載のたるみ毛穴改善剤。
- 肌の保湿性を改善する、請求項1~7のいずれか一項記載のたるみ毛穴改善剤。
- 請求項1~8のいずれか一項記載のたるみ毛穴改善剤を含む皮膚外用剤。
- 請求項1~8のいずれか一項記載のたるみ毛穴改善剤または請求項9記載の皮膚外用剤を対象の皮膚に適用する工程を含む、美容方法。
- グリシルグリシンとレチノールを含む、シワ改善剤。
- グリシルグリシンとレチノールを含む、肌弾力改善剤。
- グリシルグリシンとレチノールを含む、肌保湿性改善剤。
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| KR1020247009682A KR20240087727A (ko) | 2021-10-22 | 2022-10-07 | 늘어진 모공 개선제 |
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| WO2007013662A1 (ja) * | 2005-07-26 | 2007-02-01 | Shiseido Company, Ltd. | しわ防止・改善剤 |
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| WO2007013662A1 (ja) * | 2005-07-26 | 2007-02-01 | Shiseido Company, Ltd. | しわ防止・改善剤 |
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| DATABASE GNPD MINTEL; "Wrinkle Correcting Concentrate", XP093057820, Database accession no. 1854352 * |
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