424 results about "Melanocyte" patented technology

α-MSH and other amino acid sequences derived from α-MSH were determined to have antimicrobial influences, including against two major and representative cutaneous and mucosal pathogens; Staphylococcus aureus and Candida albicans, Pharmaceutical compositions useful as antimicrobial agents, including for use in reducing the viability of microbes, reducing the germination of yeasts, killing microbes without reducing the killing of microbes by human neutrophils, for treating inflammation in which there is microbial infection without reducing microbial killing, and for increasing the accumulation of cAMP in microbes are disclosed. The antimicrobial agent is selected from the group consisting of one or more peptides including the amino acid sequence KPV, one or more peptides including the amino acid sequence MEHFRWG, or a biologically functional equivalent of any of the foregoing. The most effective of the peprides were those bearing the C-terminal amino acid sequence of α-MSH. i.e., α-MSH (1-13), (6-13), and (11-13).

The invention discloses a whitening composition and a skin care product with the same. The whitening composition and the skin care product contain glycyrrhiza glabra extracts, arbutin and 3-o-ethyl ascorbic acid, and preferably contain nonapeptide-1, nicotinamide, ethylhexyl methoxycinnamate or composition of the nonapeptide-1, the nicotinamide and the ethylhexyl methoxycinnamate. Through mechanism analysis, the composition has the advantages that possibly due to the mutual action and influence among various ingredients, the generation of melanin is inhibited through inhibiting the activity of tyrosinase; the migration of melanocytes to the skin is retarded; in addition, the plant and microbial peptide sourced whitening ingredients and various antiallergic ingredients are selected to be combined to obtain the safe and mild whitening effect.

Methods for selection of compounds for treatment of obesity, compounds selected by the disclosed methods, and methods of treatment of obesity, wherein a selective melanocortin-4 receptor compound is identified, which compound is further characterized in that it attenuates the binding of both an agonist, including alpha-melanocyte stimulating hormone, and an inverse agonist, including agouti-related protein, to a melanocortin receptor, including melanocortin-4 receptor.

The invention describes peptide analogues of a-melanocyte-stimulating hormone (a-MSH), which posses an increased efficacy compared to the native α-MSH peptide. The α-MSH analogues exhibit increased anti-inflammatory effects and increased capability to prevent ischemic conditions compared to α-MSH. The invention further discloses use of the peptides for the manufacture of pharmaceutical compositions for the treatment or prophylaxis of a condition in the tissue of one or more organs of a mammal, and moreover pharmaceutical compositions.

The invention discloses a compound traditional Chinese medicine extract and application thereof to a whitening, moisturizing and anti-aging skin care product. The compound traditional Chinese medicine extract is prepared from the following raw material medicines in parts by mass: 10-50 parts of selaginella, 10-50 parts of peach blossom, 10-50 parts of bletilla and 10-50 parts of pseudo-ginseng. The compound traditional Chinese medicine extract which is prepared from the raw materials has an effect of suppressing tyrosinase and proliferation of melanocyte, has a superior whitening effect, has an effect of proliferating and promoting fibroblast and has an excellent effect of promoting generation of ceramide. The whitening, moisturizing and anti-aging skin care product which is obtained by applying the compound traditional Chinese medicine extract to preparing the whitening, moisturizing and anti-aging skin care product has a durable natural whitening effect and can be used for improvingmetabolism and moisturizing effects of skin.

The invention relates to a method for cosmetically treating dark spots on the skin, wherein said method is intended for eliminating at least one of said dark spots located in a region of the hand, the face, the limbs or the chest area of a person suffering from such skin hyperpigmentation, characterised in that said method includes a step of applying a spray of cryogenic fluid to said region, which brings the skin temperature to a temperature of between −4° C. and −15° C. for a consecutive application period of from 2 to 10 seconds, in order to selectively act on the melanocytes, and to a device for carrying out said method.

This invention relates to monoclonal antibodies that recognize an antigen specific to melanocytic lesions. These antibodies are useful in methods of isolating melanoma cells and diagnosing melanocytic lesions. These antibodies are also useful for immunotherapy against melanoma.

Methods and formulations are provided to reduce pigmentation in skin, using an array of compounds selected from benzimidazoles, phenylthioureas, phenyltiols, phenylamines, bi- and multicyclic phenols, thiopheneamines, and benzothiamides. The compounds preferably inhibit pigment systhesis in melanocytes through the tyrosinase pathway. The methods can be used for lightening skin, and for treating uneven skin complexions which result from hyperpigmentation-related medical conditions such as melasma, age spots, freckles, ochronosis, and lentigo. The compounds can be used medically or cosmetically.

The present invention is directed to methods for readily propagating somatic hair follicle stem cells or melanocyte stem cells. The methods comprise enhancing guanine nucleotide (GNP) biosynthesis, thereby expanding guanine nucleotide pools. This in turn conditionally suppresses asymmetric cell kinetics in the explanted cells. The methods of the invention include pharmacological methods and genetic methods. For example, the resulting cultured somatic hair follicle stem cells can be used for a variety of applications including cell replacement therapies such as hair transplants, gene therapies, and tissue engineering applications, such as the generation of artificial skin and skin regeneration strategies including skin grafts.

The invention belongs to the biotechnology filed and relates to a pigmented skin equivalent used for screening decolorizing agents and a constructing method thereof. A dermic skin equivalent layer is constructed by skin fibroblasts that are cultured in vitro and collagen, and the equivalent is constructed after inoculating keratinocyte and melanocyte on the skin equivalent layer by using gas-liquid plane three-dimensional culture technology. The obtained pigmented skin equivalent that is similar to the structure of skin can imitate the transportation process of melanin bodies, be used for screening the decolorizing agents and provide a more scientific model for the study of melanocyte in vitro biology and the screening of decolorizing agents and whitening cosmetics.

A method for inducing melanogenesis in a human subject having a melanocortin 1 receptor (MC1R) variant allele associated with loss of or diminished receptor function comprises administering to said subject an amount of an α-melanocyte stimulating hormone (α-MSH) analogue effective to induce melanogenesis by the melanocytes in the skin or other epidermal tissue of the subject.

The invention discloses a composition with effects of whitening and removing freckles and a cosmetic. The composition with effects of whitening and removing freckles comprises the following components in parts by weight: 0.01-15 parts of a main whitening and freckle-removing component, 0.1-15 parts of a primary auxiliary whitening and freckle-removing component, 0.01-10 parts of a secondary auxiliary whitening and freckle-removing component and 0.1-8 parts of an assistant component, wherein the main whitening and freckle-removing component is a raw material capable of inhibiting the tyrosinase activity or changing eumelanin into light melanin; the primary auxiliary whitening and freckle-removing component is a raw material capable of inhibiting tyrosinase expression; the secondary auxiliary whitening and freckle-removing component is a raw material capable of increasing melanocyte-stimulating hormone receptor promoting activity of melanocyte; and the assistant component is a liquid crystal emulsifier. The composition with effects of whitening and removing freckles disclosed by the invention fully achieves the synergistic effects of various components, can achieve the effects of effectively improving dull skin and brightening the skin color and has obvious effects of whitening and removing freckles. Moreover, the irritation of the product can be effectively reduced, so that the product is safe.

The invention provides a stem cell exosome capable of repairing skin as well as a preparation method and application thereof. The preparation method comprises the following step: transducing decapeptide-12 into mesenchymal stem cell exosome, thereby obtaining the stem cell exosome capable of repairing skin. According to the stem cell exosome capable of repairing skin prepared by the method disclosed by the invention, the invention first discovers that, by binding the mesenchymal stem cell exosome and decapeptide-12 and by utilizing loading capacity and low immunogenicity of exosome cells, thedecapeptide-12 can reach melanocyte so as to further inhibit tyrosinase activity, the inflammatory response can be regulated, and skin related cell regeneration is promoted. The stem cell exosome capable of repairing skin prepared by the invention can achieve effects of eliminating erythema and edema when applied to sun-burned skin, can reduce melanogenesis and further reduce pigmentation and formation of black spots after sunburn, can be applied to the fields of cosmetics, medicines for treating skin diseases and the like, and has obvious effects and important application value.

A method of stimulating the production of melanin by the pigment-producing cells (keratinocytes and/or melanocytes) of the skin, in particular for the induction of skin tanning in humans, comprises administering alpha-MSH or an alpha-MSH analogue and exposing the skin to ultraviolet irradiation.

The present invention relates to a functional pigmented skin equivalent. The invention relates to an in vivo skin equivalent which is characterized by comprising at least one epidermis equivalent and at least one dermis equivalent. The in vivo skin equivalent further comprises melanocytes constitutively producing melanin and fibroblasts. The invention also relates to a method for preparing the skin equivalent.

Peptide antagonists of alpha-melanocyte stimulating hormone are disclosed, together with methods of inhibiting the effects of alpha-melanocyte stimulating hormone on cells or tissues sensitive to that hormone. In particular, methods for lightening the pigmentation of skin and for treating malignant melanoma, as well as kits for practicing the invention are also disclosed.

The invention discloses a tissue engineering material-based culture method and applications of melanophore. In the method of the invention, the tissue engineering technology is used to build carrier material with good biocompatibility and perform culture (co-culture) and transfer of melanophore or melanophore, fibroblast and keratinocyte and the method can be used in depigmentation diseases such as vitiligo and for the regulation of skin color. The invention relates to the preparation of the carrier material with biocompatibility and the building and transplanting of the cell-carrier composite material. The carrier material can be used to provide good carrier for cell culture, maintain cellular activity and solve the problem that the cell suspension is easy to lose in the cellular transplantation process; the inoculum density and culture time of cells can be regulated at the same time, the regulation to the skin colors of different individuals can be realized; and the carrier materialhas good performances such as damage resistance, tear resistance and easy transfer, has good function of promoting wound healing, and satisfies the use requirements of the large-area depigmentation disease and the regulation of skin color.

Embodiments of methods and apparatus use electron paramagnetic resonance spectroscopy to provide a signal from melanin to image a melanoma. Embodiments of methods and apparatus use electron paramagnetic resonance spectroscopy to provide a signal from melanin to detect metastatic melanoma in a sentinel lymph node. Embodiments of methods and apparatus use electron paramagnetic resonance spectroscopy to provide a signal from melanin to measure light penetration in melanocytes in skin.

The invention relates to a method for in-vitro directional differentiation inducing of a mesenchymal stem cell towards melanocyte, particularly relates to a method for in-vitro directional differentiation inducing of the mesenchymal stem cell with an umbilical cord source towards the melanocyte, and belongs to the technical field of biology. The mesenchymal stem cell with the umbilical cord source is cultivated by adopting an explants method, and then the mesenchymal stem cell with the umbilical cord source is identified, so as to determine the characteristics of the mesenchymal stem cell; a culture medium is induced to carry out in-vitro inducing differentiation to form the melanocyte by using improved melanine; and finally the cultivated melanocyte is identified. An ES cell source and a marrow or adipose tissue-derived stromal cell source are limited or not easy to obtain while the stem cell can be easily obtained from the umbilical cord, the immunogenicity is very low, and an individual difference is not easily generated, so that the method is suitable for large-scale clinical application, and the induced melanocyte can be applied to epichrosis leucasmus therapy.

A tissue-engineered artificial skin able to regulate the pigment secretion is configured through externally culturing the ceratin cells, fibroblasts and melanocyte of skin, proportionally mixing by tissue engineering method, and forming artificial skin.

The invention provides a marine bio-moisturizing and anti-aging cosmetic composition. The composition uses jellyfish extract and fucus extract as active ingredients and comprises 5 to 15% by weight ofjellyfish extract and 5 to 15% by weight of fucus extract. Through combination of jellyfish extract and fucus extract as active ingredients and other extract and a cosmetic matrix, the production offree radicals is reduced through supplementing antioxidant substances. Collagen or enzymes are supplied so that the DPPH free radicals are effectively eliminated, the tyrosinase activity is greatly inhibited, the biosynthesis of melanin in melanocytes is reduced and anti-aging effects are obtained. The marine bio-moisturizing and anti-aging cosmetic composition is natural and environmentally friendly and can well protect the skin.

The invention discloses a traditional Chinese medicine composition with whitening and anti-aging effects and a preparation method and application of an extract thereof. The traditional Chinese medicine composition disclosed by the invention is prepared from the following ingredients in percentage by weight: 1-30% of radix asparagi, 1-30% of evening primrose, 3-50% of chaenomeles lagenaria, 3-50% of pomegranate peel, 1-30% of giant knotweed rhizome, 3-40% of herba selaginellae, 2-30% of cynomorium songaricum and 2-40% of oldenlandia diffusa. The extract of the traditional Chinese medicine composition disclosed by the invention plays roles in inhibiting melanocytes, inhibiting tyrosinase and resisting free radicals and ultraviolet rays, can be used for effectively inhibiting the generation of skin melanin, and has excellent whitening and anti-aging effects. The composition does not contain chemically-synthesized substances, is free from toxic or side effects, is low in skin irritation and stable in nature, and is safe and reliable.