ALK4-SMAD3/4 mediates the effects of activin A on the upregulation of PAI-1 in human granulosa lutein cells

被引:8
作者
Chen, Beili [1 ,2 ]
Chang, Hsun-Ming [2 ]
Zhang, Zhiguo [1 ,3 ,4 ]
Cao, Yunxia [1 ,3 ,4 ]
Leung, Peter C. K. [2 ]
机构
[1] Anhui Med Univ, Affiliated Hosp 1, Dept Obstet & Gynecol, Reprod Med Ctr, 218 Jixi Rd, Hefei 230022, Anhui, Peoples R China
[2] Univ British Columbia, BC Childrens Hosp Res Inst, Dept Obstet & Gynaecol, Vancouver, BC, Canada
[3] Anhui Med Univ, NHC Key Lab Study Abnormal Gametes & Reprod Tract, 81 Meishan Rd, Hefei 230032, Anhui, Peoples R China
[4] Anhui Med Univ, Minist Educ Peoples Republ China, Key Lab Populat Hlth Life Cycle, 81 Meishan Rd, Hefei 230032, Anhui, Peoples R China
关键词
Activin a; PAI-1; ALK4; SMAD signaling; Human granulosa cells; PLASMINOGEN-ACTIVATOR INHIBITOR-1; GROWTH-FACTOR-BETA; MESSENGER-RIBONUCLEIC-ACID; PENTRAXIN; EXPRESSION; PROGESTERONE PRODUCTION; CORPUS-LUTEUM; CONNEXIN43; DOWN-REGULATION; PGE2; PRODUCTION; ANTI-ACTIVATOR;
D O I
10.1016/j.mce.2020.110731
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
In the mammalian ovary, the proteolysis of the extracellular matrix is dynamically regulated by plasminogen activator and plasminogen activator inhibitor (PAI), and it is a critical event that influences various physiological and pathological processes. Activin A is a member of the transforming growth factor-beta superfamily and is expressed at a high level in human luteal cells that play an essential role in the regulation of the luteal function. At present, it is not known whether activin A can regulate the expression and production of PAI in human granulosa lutein (hGL) cells. The present study aimed to examine the effects of activin A on the expression and production of intraovarian PAI-1 and the underlying molecular mechanisms. Using primary and immortalized hGL cells as the cell model, we demonstrated that activin A upregulated the expression of PAI-1 and increased the production of PAI-1 in an autocrine/paracrine manner. Additionally, using a dual inhibition approach (molecular inhibitors and siRNA-mediated knockdown), we showed that this biological function is mediated by the ALK4-mediated SMAD3-SMAD4-dependent signaling pathway. Our findings suggest that activin A may be involved in the regulation of luteal function via the induction of PAI-1 expression and an increase in PAI-1 production.
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页数:10
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