Dong F, Zhang J. Carboxyl terminus of Hsc70-interacting protein (CHIP) promotes pulmonary artery smooth muscle cell (PASMC) proliferation
via enhancement of intracellular Ca
2+ concentration ([Ca
2+]
i).
Exp Lung Res 2020;
46:332-340. [PMID:
32873086 DOI:
10.1080/01902148.2020.1781296]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
AIMS OF THE STUDY
To investigate the effect of carboxyl terminus of Hsc70-interacting protein (CHIP) on pulmonary arterial smooth muscle cell (PASMC) proliferation and the underlying mechanism. Materials and Methods: PASMCs were harvested from distal PAs isolated from SD rat lungs and cultured. After CHIP overexpression, PASMCs were exposed to normoxia or hypoxia for 60 h. Then, PASMC proliferation, store-operated Ca2+ entry (SOCE), [Ca2+]i and the expression of TRPC1, TRPC4, and TRPC6 in PASMCs were measured. Results: CHIP overexpression promoted PASMC proliferation, SOCE, [Ca2+]i and the expression of TRPC1, TRPC4, and TRPC6. Conclusions: CHIP stimulates PASMC proliferation likely by targeting the TRPC1,4,6-SOCE-[Ca2+]i signaling pathway.
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