Lethal (2) giant larvae regulates pleural mesothelial cell polarity in pleural fibrosis.

Lethal (2) giant larvae regulates pleural mesothelial cell polarity in pleural fibrosis.
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致死(2)巨型幼虫调节胸膜纤维化中的胸膜间皮细胞极性。

DOI:
10.1016/j.bbamcr.2018.05.013
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发表时间:
2018-09
期刊:
Biochim Biophys Acta
影响因子:
--
通讯作者:
Ma Wan-Li
Ma Wan-Li
中科院分区:
其他
文献类型:
--
作者:
Song Lin-Jie;Zhou Li-Ling;Wang Meng;Liu Fei;Xiong Liang;Xiang Fei;Yu Fan;He Xin-Liang;Xu Juan-Juan;Shi Huan-Zhong;Xin Jian-Bao;Ye Hong;Ma Wan-Li

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胸膜纤维化几乎不可逆转,其潜在机制尚不清楚。具有顶端-基底极性的胸膜间皮细胞(PMC)在胸膜纤维化中发挥关键作用。细胞极性的丧失与纤维化疾病的发展有关。分区缺陷蛋白(PAR)复合物是细胞极性的关键调节因子。然而,胸膜纤维化过程中PMC极性和PAR复合体的变化仍不清楚。在这项研究中,我们观察到纤维化胸膜中 PMC 极性丢失。接下来,我们发现与 PAR 复合物中的 PAR-3A 竞争的 aPKC 和 PAR-6B 结合的致命 (2) 巨型幼虫 (Lgl) 增加,导致细胞极性丧失。然后我们证明,Lgl1 siRNA 可防止 PMC 中的细胞极性丧失,而 Lgl1 条件性敲除 (ER-Cre+/-Lgl1flox/flox) 可减轻小鼠模型中的胸膜纤维化。我们的数据表明,Lgl1 调节 PMC 的细胞极性,抑制 Lgl1 并维持 PMC 中的细胞极性可能是胸膜纤维化的潜在治疗方法。
Pleural fibrosis is barely reversible and the underlying mechanisms are poorly understood. Pleural mesothelial cells (PMCs) which have apical-basal polarity play a key role in pleural fibrosis. Loss of cell polarity is involved in the development of fibrotic diseases. Partition defective protein (PAR) complex is a key regulator of cell polarity. However, changes of PMC polarity and PAR complex in pleural fibrosis are still unknown. In this study, we observed that PMC polarity was lost in fibrotic pleura. Next we found increased Lethal (2) giant larvae (Lgl) bound with aPKC and PAR-6B competing against PAR-3A in PAR complex, which led to cell polarity loss. Then we demonstrated that Lgl1 siRNA prevented cell polarity loss in PMCs, andLgl1conditional knockout (ER-Cre+/−Lgl1flox/flox) attenuated pleural fibrosis in a mouse model. Our data indicated that Lgl1 regulates cell polarity of PMCs, inhibition of Lgl1 and maintenance of cell polarity in PMCs could be a potential therapeutic treatment approach for pleural fibrosis.
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