ALK2/ALK3-BMPR2/ACVR2A Mediate BMP2-induced downregulation of pentraxin 3 expression in human granulosa-lutein cells
Endocrinology, ISSN: 1945-7170, Vol: 158, Issue: 10, Page: 3501-3511
2017
- 28Citations
- 16Captures
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Metrics Details
- Citations28
- Citation Indexes28
- 28
- CrossRef21
- Captures16
- Readers16
- 16
Article Description
Bone morphogenetic protein 2 (BMP2) belongs to the transforming growth factor-b superfamily and plays a critical role in regulating ovarian follicle function. Currently, the role of BMP2 during cumulus expansion remains to be determined. The aim of this study was to investigate the effect of BMP2 on the regulation of pentraxin 3 (PTX3) expression (the major component of cumulus expansion) and the underlying mechanisms in human granulosa-lutein (hGL) cells. Both primary and immortalized hGL cells were used as research models. Our results showed that treatment with BMP2 significantly suppressed the basal and luteinizing hormone-induced upregulation of PTX3. In addition, BMP2 stimulated the phosphorylation of SMAD1/5/8, and this effect was abolished by the addition of BMP type I receptor inhibitors, dorsomorphin homolog 1, and dorsomorphin but not SB431542. Moreover, the knockdown of activin receptorlike kinase 2/3 or BMP receptor type II/ activin receptor type IIB receptors completely reversed the BMP2-induced phosphorylation of SMAD1/5/8 and restored PTX3 expression. Similarly, the knockdown of SMAD4 completely reversed the suppressive effect of BMP2 on the expression of PTX3. These results improve our understanding of themolecular mechanisms of BMP2 signaling. Our findings suggest that BMP2 may be involved in the regulation of cumulus expansion during the periovulatory stage. (Endocrinology 158: 3501-3511, 2017).
Bibliographic Details
The Endocrine Society
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