相关实验视频
Updated: Jun 23, 2025

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Purification of the Dendritic Filopodia-rich Fraction
Published on: May 2, 2019
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普罗利尔内多酶参与了 Filaggrinolysis 和角化过程
Julie Briot1, Carole Pons1, Aude Foucher2
1Toulouse Institute for Infectious and Inflammatory Diseases (INFINITy), University of Toulouse, INSERM UMR1291 - CNRS UMR5051, Toulouse, France.
The Journal of investigative dermatology
|June 15, 2024
概括
普罗利尔内酶 (PREP) 被确定为 filaggrinolysis 中的一个关键酶,对皮肤屏障功能至关重要. 抑制PREP会扰乱费拉格林的处理和角质细胞的分化,影响皮肤的水分和完整性.
科学领域:
- 生物化学 生化学
- 皮肤病学 皮肤病学
- 分子生物学分子生物学
背景情况:
- 费拉格林 (FLG) 蛋白质溶解,或费拉格林溶解,产生天然的保湿因子,对于皮肤水化至关重要.
- filaggrinolysis 的完整的酶途径涉及几个蛋白酶/酶,其中一些仍然未被识别.
- FLG是亚托皮性皮炎和皮肤干燥的关键生物标志物.
研究的目的:
- 为了确定参与 filaggrinolysis 的新型酶候选者.
- 为了研究prolyl endopeptidase (PREP) 在FLG代谢和角质细胞分化中的作用.
主要方法:
- 对16个欧米克数据集的生物信息分析,以确定候选酶.
- 免疫光和共聚焦显微镜以确定与FLG相对PREP局部.
- 协同测量质谱和活性测试,以评估PREP在FLG衍生上的酶活性.
- 在重建的人类表皮中进行抑制和RNA干扰研究,以评估PREP的功能影响.
- 定量蛋白质组学,西部涂抹和RT-qPCR用于分析蛋白质和基因表达变化.
- 测量皮肤间电阻 (TEER) 以评估皮肤屏障功能.
主要成果:
- 确定了PREP作为候选酶,并局部化到颗粒状和深层角状层,与FLG.同局化.
- PREP表现出酶活性,在proline残留的碳素侧分裂FLG衍生,在减弱后提高效率.
- 特别抑制或降低PREP的调节导致FLG单体积累,并减少了其他角化标记物的表达,包括白胺酸和洛里克林.
- 功能性测试显示,在PREP调节后,皮肤间电阻显著降低,表明皮肤屏障功能受损.
结论:
- 预备剂在 filaggrinolysis 和 keratinocyte 分化中起着重要的作用.
- PREP的活动对于适当的FLG处理和保持皮肤屏障完整性至关重要.
- 向PREP可能为与皮肤屏障功能受损相关的疾病提供一种新的治疗策略,例如亚托邦性皮炎.
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