Abstract:
PURPOSE: A composition containing medicinal herb extract for skin care or plasty is provided to promote differentiation of mesenchymal stem cells to adipocytes. CONSTITUTION: A composition for promoting adipocyte differentiation contains Linderae Radix extract as an active ingredient. The composition increases fat tissue and promotes differentiation of mesenchymal stem cells to adipocytes. The mesenchymal stem cells are derived from human bone marrow.
Abstract:
PURPOSE: A method for screening a material which relieves skin irritation by environmental harmful factor is provided to manufacture an external use formulation and to detoxify. CONSTITUTION: A method for screening a material which relieves skin irritation by environmental harmful factor comprises: a step of treating candidates which regulates intracellular factor in vitro; a step of treating the environmental harmful factor to test cells to induce overexpression of the factor; and a step of measuring expression level. The test cells are keratinocytes. The environmental harmful factor is pollen or yellow sand. The overexpressed factor is interleukin 6 or 8, GSTT1, NQ01, or hBD3. The screened material is Melia azedarach L. var. japonica Makino or Tussilago farfara L. extract.
Abstract:
PURPOSE: A method for screening a material which induces skin irritation by yellow dust is provided to reduce skin irritative factor expression and to reduce skin irritation by yellow dust. CONSTITUTION: A method for screening a material which induces skin irritation by yellow dust comprises: a step of treating yellow dust to keratinocytes; and a step of screening a gene of which expression level is significantly changed comparing with the expression of normal keratinocytes through RT-PCR. The material which induces skin irritation by yellow dust is AhR or CYP. A method for screening a material which relieves skin irritation by yellow dust comprises: a step of treating yellow dust to test cells to induce overexpression of an irritative factor; a step of treating a candidate material to the overexpressed cells; a step of measuring expression level of the irritative factor by RT-PCR. The material which relieves skin irritation by yellow dust is Trichosanthis semen. An external use skin composition for relieving skin irritation contains 0.001-1 weight% of Trichosanthis semen.
Abstract:
PURPOSE: A method for screening dynamic stimulation for improving skin function is provided to measure biochemical change against external stimulation and screen kind, form, size, intensity, and time of dynamic stimulation. CONSTITUTION: A method for screening dynamic stimulation for improving skin function comprises: a first step of performing repeatitive dynamic stimulation to skin; a second step of measuring biochemical change of skin by dynamic stimulation; and a third step of selecting useful dynamic stimulation based on biochemical change. The measurement is performed by measuring mRNA expression level of fibroblast-derived gene. In the third step, nerve growth factor, neurotrophin 3, TIMP 1, TrkA, TrkC, TGF alpha, TGF beta1, TGF beta2 or TGF beta3 gene is selected as dynamic stimulation.
Abstract:
A method for inducing itch and a method for screening an itch inhibiting material using glucosylsphingosine are provided to be useful for studying and understanding the itch, thereby being very usefully used for developing a therapeutic agent for the itch and evaluating the effect of a medicine. A method for inducing itch comprises a step of administering at least one compound selected from the group consisting of glucosylsphingosine and a derivative thereof into an animal except human. A method for screening an itch inhibiting material comprises the steps of: (a) administering an itch inhibition candidate material to an animal where the itch is induced by administering at least one compound selected from the group consisting of the glucosylsphingosine and the derivative thereof; and (b) counting a number when the animal scratches. A method for evaluating the itch inhibition effect comprises the steps of: (a) administering an itch inhibition material to an animal where the itch is induced by administering at least one compound selected from the group consisting of the glucosylsphingosine and the derivative thereof; and (b) counting a number when the animal scratches. A composition for inducing itch comprises at least one compound selected from the group consisting of the glucosylsphingosine and the derivative thereof as an effective ingredient.