目的:雌激素(E)和孕激素(P)是主要的雌性激素,在整个月经周期中随着浓度比的变化而分泌。这些激素已经单独研究了它们在皮肤中的生理功能,但其浓度比(E/P)及其对皮肤的影响尚未被研究。这项研究的目的是阐明E/P比率对皮肤屏障功能的影响。月经周期分为月经,卵泡,排卵,和黄体期。
方法:将与每个阶段对应的E/P浓度比添加到三维表皮模型或正常人表皮角质形成细胞中5天。几种细胞分化标志物的基因和蛋白表达水平,包括菊酯(LOR)和转谷氨酰胺酶(TGase),通过实时PCR和蛋白质印迹进行定量,分别。测量三维表皮模型的经表皮失水(TEWL),和神经酰胺含量通过薄层色谱法定量。
结果:表皮分化标记的基因表达,LOR和TGase,当应用与月经期和黄体期相关的E/P浓度比时增加。LOR蛋白水平从月经期到黄体期降低,从月经期到黄体期,TGase蛋白水平增加。在同一阶段,神经酰胺NS增加,TEWL降低。
结论:以特定的E/P浓度比培养细胞可改善皮肤屏障功能,这将,因此,被认为对女性皮肤有益。这表明失调的E/P浓度比可能是某些皮肤问题的原因。
OBJECTIVE: Estrogen (E) and progesterone (P) are the major female hormones and are secreted with changing concentration ratios throughout the menstrual cycle. These hormones have been studied individually regarding their physiological function in the skin, but their concentration ratio (E/P) and its effect on the skin has not yet been investigated. The purpose of this study was to clarify the effect of the E/P ratio on skin barrier function. The menstrual cycle was divided into the menstrual, follicular, ovulation, and luteal phases.
METHODS: The E/P concentration ratios corresponding with each phase were added to a three-dimensional epidermal model or normal human epidermal keratinocytes for 5 days. Gene and protein expression levels of several markers of cell differentiation, including loricrin (LOR) and transglutaminase (TGase), were quantified by real-time PCR and western blotting, respectively. Transepidermal water loss (TEWL) of the three-dimensional epidermal model was measured, and ceramide content was quantified by thin-layer chromatography.
RESULTS: Gene expression of the epidermal differentiation markers, LOR and TGase, increased when applying the concentration ratio of E/P associated with the menstrual and luteal phases. The LOR protein level decreased from menstrual to luteal phases, and the TGase protein level increased from menstrual to luteal phases. During the same phases, ceramide NS increased and TEWL decreased.
CONCLUSIONS: Skin barrier function was improved by culturing cells at specific E/P concentration ratios, which would, therefore, be considered beneficial for female skin. This suggests that dysregulated E/P concentration ratios may be the cause of certain skin problems.