Shiseido Company, Limited

Yosuke Tojo

Masashi Mita

Chieko Mizumoto

Yutaka Ashida

Yuzo Yoshida

Masato Iino

Wolfgang Lindner

Hisashi Mori

Shoichiro Shimada

Kayo Matsumoto

Yuko Matsuura

Jun-ichi Hosoi

Hanayo Matsumoto

Jun-Ichi Hosoi

The purpose of the present invention is to develop a method for screening drugs having the effect of increasing skin barrier function in in vitro studies and to evaluate barrier function in the skin. Candidate drugs can be screened by using the activity and/or expression level of serine racemase as an indicator.

Method for screening agents promoting skin barrier function and method for evaluating skin barrier function taking epidermal serine racemase and/or D-serine level as indicator

The present invention addresses the problem of providing a novel method for the pretreatment of a biological sample containing lenalidomide enantiomer and thereby establishing a simple and accurate method for the quantitative analysis of lenalidomide enantiomer. In the present invention, the racemization and decomposition of lenalidomide enantiomer in a biological sample can be prevented by the deproteinization under acidic conditions of the biological sample containing lenalidomide enantiomer, and the lenalidomide enantiomer can be simply and accurately quantitatively analyzed by subjecting to HPLC the biological sample that has been pretreated in such a way.

Method for pretreatment and method for analysis of lenalidomide in biological sample

The problem addressed by the present invention is to provide a novel method for separating and purifying pure enantiomer of lenalidomide. Pure enantiomer of lenalidomide can be separated and purified by using, as the mobile phase, an organic solvent selected from the group consisting of aprotic solvents, secondary alcohols, and mixtures thereof.

Optical resolution method of lenalidomide

Disclosed is a stable and safe antioxidant composition which can be used routinely. Specifically disclosed is an antioxidant composition which contains one or more compounds selected from the group consisting of D-aspartic acid, derivatives and/or salts thereof. The composition may be used for the purpose of suppressing and/or improving skin conditions. The skin conditions may include, but is not limited to, fine wrinkles, a rough skin, a dry skin, a skin cancer, a skin allergy, an inflammation of the skin and a photosensitive dermatosis. The composition may be used for an external preparation for the skin, a food, and a pharmaceutical product for cataract.

Antioxidant composition

Disclosed are: a composition for alleviating ultraviolet irradiation-induced damage, which can be used on a daily based and is stable and safe; and a pharmaceutical preparation, a cosmetic and a food composition, each of which comprises the composition. The composition for alleviating ultraviolet irradiation-induced damage contains one or more compounds selected from the group consisting of D-glutamic acid, L-glutamic acid, D-proline, D-cystine, L-cystine, and derivatives and/or salts of the aforementioned compounds. The composition can be used as an external formulation for the skin, a cosmetic composition, an anti-wrinkle agent, a sunscreen agent, a pharmaceutical composition for treating and/or preventing skin diseases, a food composition, or a pharmaceutical composition for preventing or treating cataract.

Composition for alleviating ultraviolet radiation-induced damage

Disclosed is a novel composition which has an effect on promoting production of collagen. The composition has high photostability and is free from side effects such as those of retinoids. Specifically disclosed is a composition for promoting collagen production which contains one or more compounds selected from the group consisting of D-aspartic acid, D-alanine, derivatives and/or salts thereof. The composition may be used for the purpose of suppressing and/or improving skin a condition. The skin condition may include but is not limited to photoaging and/or wrinkles. The composition may be used for an external preparation for the skin or food. The composition may be a composition for promoting type I collagen production.

Composition for promoting collagen production

Disclosed is a novel composition which has a function of stimulating production of laminin-332. The composition is stable and safe, and can be used routinely. Specifically disclosed is a laminin-332 production stimulating composition which contains one or more compounds selected from the group consisting of D-alanine, D-hydroxyproline, derivatives and/or salts thereof. The composition may be used for the purpose of suppressing and/or improving a skin condition. The skin condition may include, but is not limited to a photoaging, wrinkles, a rough skin, fine wrinkles and a dry skin. The composition may be used for an external preparation for the skin or a food.

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Yokohama, Japan

Yosuke Tojo