The mechanism of OC-STAMP overexpression induced actin cytoskeleton remodeling in promoting epithelial-mesenchymal transition in the alveolar type Ⅱ epithelial cell
10.3760/cma.j.cn121094-20221009-00479
- VernacularTitle:肺泡Ⅱ型上皮细胞过表达OC-STAMP诱导肌动蛋白细胞骨架重塑促进上皮-间质转化的机制
- Author:
Fei GENG
1
;
Yuhao CAI
;
Ying ZHAO
;
Zhongqiu WEI
;
Hong XU
;
Fang YANG
Author Information
1. 华北理工大学公共卫生学院医学实验技术系，河北省器官纤维化重点实验室，唐山 063000
- Keywords:
Actin;
Epithelial-mesenchymal transition;
Osteoclast stimulatory transmembrane protein;
Silicosis
- From:
Chinese Journal of Industrial Hygiene and Occupational Diseases
2023;41(11):801-807
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the mechanism of osteoclast stimulatory transmembrane protein (OC-STAMP) overexpression on epithelial-mesenchymal transition (EMT) .Methods:In April 2021, mice alveolar type Ⅱ epithelial cells MLE-12 were divided into five groups: overexpression control group (NC group), Ocstamp overexpression group (over- Ocstamp group), Fasudil intervention group (over- Ocstamp+Fasudil group), silence control group (si-NC group), Ocstamp silence group (si- Ocstamp group). The protein expressions of OC-STAMP, epithelial marker protein-E-cadherin (E-cad), interstitial marker protein-α-smooth muscle actin (α-SMA), Ras homolog gene family member A (RhoA), Rho GDP dissociation inhibitor α (Rho GDIα), Rho-associated protein kinase (ROCK), phosphate myosin phosphatase (p-MYPT) were examined by Western blotting and Immunocytochemical staining. The filamentous actin (F-actin) was detected by Phalloidin method. t test was used to compare the relative expression of each protein between the two groups. Results:Western blotting and Immunocytochemical staining showed that compared with the NC group, the expression level of E-cad was down-regulated, while the expression levels of α-SMA, Rho GDIα, RhoA, ROCK, p-MYPT were increased, and F-actin expression was enhanced in the over- Ocstamp group. The differences were statistically significant ( P<0.05). There were no significant differences in E-cad and α-SMA protein expression in si- Ocstamp group compared with si-NC group ( P>0.05). Compared with over- Ocstamp group, the expression level of E-cad protein in over- Ocstamp+Fasudil group was up-regulated, the expression levels of α-SMA, Rho GDIα, RhoA, ROCK and p-MYPT protein were decreased, and F-actin expression was weakened, with statistical significance ( P<0.05) . Conclusion:OC-STAMP overexpression in alveolar type Ⅱ epithelial cells may induce actin cytoskeleton remodeling through activation of Rho GDIα/RhoA/ROCK signaling pathway, thus promoting EMT.
