J Periodontal Res:gingipain通过整合素β1破坏f-actin并导致成骨细胞凋亡

2018-10-01 MedSci MedSci原创

本实验旨在研究gingipain引起的成骨细胞细胞形态和细胞凋亡变化的细胞机制。

本实验旨在研究gingipain引起的成骨细胞细胞形态和细胞凋亡变化的细胞机制。

方法:用牙龈卟啉单胞菌W83的gingipain提取物处理人颅骨成骨细胞和小鼠成骨细胞MC3T3-E1。用膜联蛋白V和碘化丙啶流式细胞术分析或末端脱氧核苷酸转移酶介导的dUTP缺口末端标记染色检测细胞凋亡。通过免疫染色测定F-肌动蛋白。 用Western印迹检测蛋白质表达。用敲除和过表达的方法确定整合素β1的作用。

结果:暴露于gingipain提取物的成骨细胞显示出细胞凋亡增加,伴随着F-肌动蛋白完整性和细胞收缩的丧失。半胱氨酸蛋白酶抑制剂N-甲苯磺酰基-1-赖氨酰氯甲基酮消除了gingipain提取物的作用。值得注意的是,gingipain提取物导致整联蛋白β1减少,伴随活性RhoA减少,而对总RhoA没有影响。整合素β1的敲除类似于gingipain处理后的成骨细胞。相反,通过整合素β1的过表达或RhoA激动剂CN03消除了gingipain提取物的作用。

Gingipain诱导的F-肌动蛋白破坏和凋亡是由整合素β1的降解和RhoA活性的抑制介导的,这是成骨细胞凋亡的原因。

原始出处:

Q. Qiu, et al.Gingipains disrupt F‐actin and cause osteoblast apoptosis via integrin β1. Journal of  Periodontal Research. 2018 October. Doi:10.1111/jre.12563

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    2019-05-19 feather89
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    2018-10-03 wxl882001

    学习一下

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    2018-10-03 zhaojie88
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