Waardenburg综合征(Waardenburg syndrome,WS)是一种常染色体显形遗传疾病,以毛发、皮肤、眼睛色素异常以及感音神经性听力障碍为特征。本文报告1例8月龄男患儿,表现为先天性耳聋伴双侧虹膜灰蓝色、毛发颜色偏黄、内眦外移。患儿及其家...Waardenburg综合征(Waardenburg syndrome,WS)是一种常染色体显形遗传疾病,以毛发、皮肤、眼睛色素异常以及感音神经性听力障碍为特征。本文报告1例8月龄男患儿,表现为先天性耳聋伴双侧虹膜灰蓝色、毛发颜色偏黄、内眦外移。患儿及其家系成员均进行基因测序分析。基因检测结果表明患儿存在MITF基因的c.970_972del(p.R324del)杂合变异,为新生变异;患儿父母该位点均无变异。根据美国医学遗传学与基因组学学会(American College of Medical Genetics and Genomics,ACMG)指南判读该变异为致病变异。MITF基因c.970_972del(p.R324del)在WS2A型中为一新发突变位点,是导致该患儿患病的致病基因。展开更多
Glabridin is the main ingredient of hydrophobic fraction in licorice extract and has been shown to have anti-melanogenesis activity in skins.However,the underlying mechanism(s)remain not completely understood.The aim ...Glabridin is the main ingredient of hydrophobic fraction in licorice extract and has been shown to have anti-melanogenesis activity in skins.However,the underlying mechanism(s)remain not completely understood.The aim of this study is thus to elucidate the possible mechanisms related to the melanogenesis suppression by glabridin in cultured B16 murine melanoma cells and in UVA radiation induced hyperpigmentation model of BALB/c mice as well.Molecular docking simulations revealed that between catalytic core residues and the compound.The treatment by glabridin significantly downregulated both transcriptional and/or protein expression of melanogenesis-related factors including melanocyte stimulating hormone receptor(MC1R),microphthalmia-associated transcription factor(MITF),tyrosinase(TYR),TYR-related protein-1(TRP-1)and TRP-2 in B16 cells.Both PKA/MITF and MAPK/MITF signaling pathways were found to be involved in the suppression of melanogenesis by glabridin in B16 cells.Also in vivo glabridin therapy significantly reduced hyperpigmentation,epidermal thickening,roughness and inflammation induced by frequent UVA exposure in mice skins,thus beneficial for skin healthcare.These data further look insights into the molecular mechanisms of melanogenesis suppression by glabridin,rationalizing the application of the natural compound for skin healthcare.展开更多
文摘Waardenburg综合征(Waardenburg syndrome,WS)是一种常染色体显形遗传疾病,以毛发、皮肤、眼睛色素异常以及感音神经性听力障碍为特征。本文报告1例8月龄男患儿,表现为先天性耳聋伴双侧虹膜灰蓝色、毛发颜色偏黄、内眦外移。患儿及其家系成员均进行基因测序分析。基因检测结果表明患儿存在MITF基因的c.970_972del(p.R324del)杂合变异,为新生变异;患儿父母该位点均无变异。根据美国医学遗传学与基因组学学会(American College of Medical Genetics and Genomics,ACMG)指南判读该变异为致病变异。MITF基因c.970_972del(p.R324del)在WS2A型中为一新发突变位点,是导致该患儿患病的致病基因。
基金supported by the Inner Mongolia Autonomous Region Science and Technology Revitalization Foundation (2021CG0029)the National Natural Science Foundation of China (22178070)
文摘Glabridin is the main ingredient of hydrophobic fraction in licorice extract and has been shown to have anti-melanogenesis activity in skins.However,the underlying mechanism(s)remain not completely understood.The aim of this study is thus to elucidate the possible mechanisms related to the melanogenesis suppression by glabridin in cultured B16 murine melanoma cells and in UVA radiation induced hyperpigmentation model of BALB/c mice as well.Molecular docking simulations revealed that between catalytic core residues and the compound.The treatment by glabridin significantly downregulated both transcriptional and/or protein expression of melanogenesis-related factors including melanocyte stimulating hormone receptor(MC1R),microphthalmia-associated transcription factor(MITF),tyrosinase(TYR),TYR-related protein-1(TRP-1)and TRP-2 in B16 cells.Both PKA/MITF and MAPK/MITF signaling pathways were found to be involved in the suppression of melanogenesis by glabridin in B16 cells.Also in vivo glabridin therapy significantly reduced hyperpigmentation,epidermal thickening,roughness and inflammation induced by frequent UVA exposure in mice skins,thus beneficial for skin healthcare.These data further look insights into the molecular mechanisms of melanogenesis suppression by glabridin,rationalizing the application of the natural compound for skin healthcare.
