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J Periodontal Res:肽精氨酸脱亚胺酶在维持大鼠口腔粘膜角质化中的作用

2018-10-01 MedSci MedSci原创

不同来源上皮细胞的分化能力有显着差异,允许它们提供合适的保护屏障。本研究旨在阐明肽基精氨酸脱亚胺酶(PAD)在大鼠腭和颊粘膜分层过程中修饰关键表皮蛋白聚丝蛋白(FLG)和角蛋白1(K1)的作用。

不同来源上皮细胞的分化能力有显着差异,允许它们提供合适的保护屏障。本研究旨在阐明肽基精氨酸脱亚胺酶(PAD)在大鼠腭和颊粘膜分层过程中修饰关键表皮蛋白聚丝蛋白(FLG)和角蛋白1(K1)的作用。

研究进行了免疫荧光,免疫印迹,PAD活性测定和双向电泳,并开发了器官型培养模型。

结果:PAD1在腭中表达最高,而PAD2,PAD3和PAD4表达在皮肤中最高,表明PAD同工酶的组织特异性表达导致钙依赖性的差异。免疫印迹显示FLG单体及其降解产物和前体(proFLG)在皮肤中表达最丰富,但在腭中低表达,而在颊粘膜中仅检测到微弱的proFLG表达。 FLG和K1与PAD1共定位,并且可能在皮肤的角质化层中被瓜氨酸化;在腭表面未检测到这种共定位,并且在腭的颗粒中发现可能是瓜氨酸化和PAD1的pFL1点状存在。源自大鼠腭的器官型模型显示,PAD抑制降低了FLG的分解,增加了其与K1的结合以及上皮致密性,并且在染料渗透性测定中发现其降低了渗透性。相反,PAD刺激具有相反的效果。

瓜氨酸化可能是蛋白质修饰,其以与皮肤明显不同的方式,在维持口腔角质化粘膜的结构和功能中起重要作用。

原始出处:

S. Arita, et al.Peptidylarginine deiminase is involved in maintaining the cornified oral mucosa of rats. Journal of  Periodontal Research. 2018 October. Doi:10.1111/jre.12561

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    2019-01-25 feather89
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    2018-11-19 guoyibin
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    2018-10-05 wxl882001

    学习一下

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