目的观察大翅蓟属植物提取物对皮肤屏障相关蛋白的表达的影响,探讨其屏障修复作用。方法通过使用胶带黏贴的方法,对离体培养的皮肤造成皮肤屏障功能损伤模型,每隔2 d涂抹大翅蓟属植物提取物,7 d后评估损伤皮肤的淋巴上皮Kazal型相关抑...目的观察大翅蓟属植物提取物对皮肤屏障相关蛋白的表达的影响,探讨其屏障修复作用。方法通过使用胶带黏贴的方法,对离体培养的皮肤造成皮肤屏障功能损伤模型,每隔2 d涂抹大翅蓟属植物提取物,7 d后评估损伤皮肤的淋巴上皮Kazal型相关抑制因子(Lympho-epithelial Kazal type related inhibitor,LEKTI),兜甲蛋白(Loricrin,LOR),内披蛋白(Involucrin,INV)丝聚合蛋白(Filaggrin,FLG)的表达情况。结果正常皮肤和受损皮肤的LEKTI,LOR,INV,FLG染色均有增强,受损皮肤增强更为明显。结论大翅蓟属植物提取物可以提高皮肤FLG、LOR、INV、LEKTI的表达,进而提高皮肤屏障功能。展开更多
Background： Atopic dermatitis （AD） is characterized by defective skin barrier and imbalance in T helper 1/T helper 2 （Th 1/Th2） cytokine expression.Filaggrin （FLG） is the key protein to maintaining skin barrier...Background： Atopic dermatitis （AD） is characterized by defective skin barrier and imbalance in T helper 1/T helper 2 （Th 1/Th2） cytokine expression.Filaggrin （FLG） is the key protein to maintaining skin barrier function.Recent studies indicated that Th1/Th2 cytokines influence FLG expression in keratinocytes.However, the role ofThl/Th2 cytokines on FLG processing is not substantially documented.Our aim was to investigate the impact ofThl/Th2 cytokines on FLG processing.Methods： HaCaT cells and normal human keratinocytes were cultured in low and high calcium media and stimulated by either interleukin （IL）-4, 13 or interferon-γ（IFN-γ）.FLG, its major processing proteases and key protease inhibitor lymphoepithelial Kazal-type-related inhibitor （LEKTI） were measured by both real-time quantitative polymerase chain reaction and Western blotting.Their expression was also evaluated in acute and chronic AD lesions by immunohistochemistry.Results： IL-4/13 significantly reduced, while IFN-γsignificantly up-regulated FLG expression.IL-4/13 significantly increased, whereas IFN-γsignificantly decreased the expression ofkallikreins 5 and 7, matriptase and channel-activating serine protease 1.On the contrary, IL-4/13 significantly decreased, while IFN-γincreased the expression of LEKTI and caspase-14.Similar trends were observed in AD lesions.Conclusions： Our results suggested that Th1/Th2 cytokines differentially regulated the expression of major FLG processing enzymes.The imbalance between Th1 and Th2 polarized immune response seems to extend to FLG homeostasis, through the network of FLG processing enzymes.展开更多
文摘目的观察大翅蓟属植物提取物对皮肤屏障相关蛋白的表达的影响,探讨其屏障修复作用。方法通过使用胶带黏贴的方法,对离体培养的皮肤造成皮肤屏障功能损伤模型,每隔2 d涂抹大翅蓟属植物提取物,7 d后评估损伤皮肤的淋巴上皮Kazal型相关抑制因子(Lympho-epithelial Kazal type related inhibitor,LEKTI),兜甲蛋白(Loricrin,LOR),内披蛋白(Involucrin,INV)丝聚合蛋白(Filaggrin,FLG)的表达情况。结果正常皮肤和受损皮肤的LEKTI,LOR,INV,FLG染色均有增强,受损皮肤增强更为明显。结论大翅蓟属植物提取物可以提高皮肤FLG、LOR、INV、LEKTI的表达,进而提高皮肤屏障功能。
文摘Background： Atopic dermatitis （AD） is characterized by defective skin barrier and imbalance in T helper 1/T helper 2 （Th 1/Th2） cytokine expression.Filaggrin （FLG） is the key protein to maintaining skin barrier function.Recent studies indicated that Th1/Th2 cytokines influence FLG expression in keratinocytes.However, the role ofThl/Th2 cytokines on FLG processing is not substantially documented.Our aim was to investigate the impact ofThl/Th2 cytokines on FLG processing.Methods： HaCaT cells and normal human keratinocytes were cultured in low and high calcium media and stimulated by either interleukin （IL）-4, 13 or interferon-γ（IFN-γ）.FLG, its major processing proteases and key protease inhibitor lymphoepithelial Kazal-type-related inhibitor （LEKTI） were measured by both real-time quantitative polymerase chain reaction and Western blotting.Their expression was also evaluated in acute and chronic AD lesions by immunohistochemistry.Results： IL-4/13 significantly reduced, while IFN-γsignificantly up-regulated FLG expression.IL-4/13 significantly increased, whereas IFN-γsignificantly decreased the expression ofkallikreins 5 and 7, matriptase and channel-activating serine protease 1.On the contrary, IL-4/13 significantly decreased, while IFN-γincreased the expression of LEKTI and caspase-14.Similar trends were observed in AD lesions.Conclusions： Our results suggested that Th1/Th2 cytokines differentially regulated the expression of major FLG processing enzymes.The imbalance between Th1 and Th2 polarized immune response seems to extend to FLG homeostasis, through the network of FLG processing enzymes.
