The transient receptor potential vanilloid-3 regulates hypoxia-mediated pulmonary artery smooth muscle cells proliferation via PI3K/AKT signaling pathway

被引:45
|
作者
Zhang, Qianlong [1 ]
Cao, Yonggang [2 ]
Luo, Qian [1 ]
Wang, Peng [1 ]
Shi, Pilong [2 ]
Song, Chao [2 ]
E, Mingyao [2 ]
Ren, Jing [2 ]
Fu, Bowen [2 ]
Sun, Hongli [2 ]
机构
[1] Harbin Med Univ Daqing, Dept Physiol, Daqing, Peoples R China
[2] Harbin Med Univ Daqing, Dept Pharmacol, Daqing, Peoples R China
关键词
15-HYDROXYEICOSATETRAENOIC ACID; APOPTOSIS IMBALANCE; UP-REGULATION; TRPV3; EXPRESSION; CHANNELS; HYPERTENSION; ACTIVATION; INHIBITION; MIGRATION;
D O I
10.1111/cpr.12436
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
ObjectvesTransient receptor potential vanilloid 3 (TRPV3) is a member of the TRP channels family of Ca2+-permeant cation channels. In this study, we aim to investigate the role of TRPV3 in pulmonary vascular remodeling and PASMCs proliferation under hypoxia. Materials and methodsThe expression of TRPV3 was evaluated in patients with pulmonary arterial hypertension (PAH) and hypoxic rats, using hematoxylin and eosin (H&E) and immunohistochemistry. In vitro, MTT assay, flow cytometry, Western blotting and immunofluorescence were performed to investigate the effects of TRPV3 on proliferation of PASMCs. ResultsWe found that, in vivo, the expression of TRPV3 was increased in patients with PAH and hypoxic rats. Right ventricular hypertrophy measurements and pulmonary pathomorphology data show that the ratio of the heart weight/tibia length (HW/TL), the right ventricle/left ventricle plus septum (RV/LV+S) and the medial width of the pulmonary artery were increased in chronic hypoxic rats. Moreover, the expression of proliferating cell nuclear antigen (PCNA), Cyclin D, Cyclin E and Cyclin A, phospho-CaMKII (p-CaMKII) were induced by hypoxia. In vitro, we revealed that hypoxia promoted PASMCs viability, increased the expression of PCNA, Cyclin D, Cyclin E, Cyclin A p-CaMKII, made more cells from G(0)/G(1) phase to G(2)/M+S phase, enhanced the microtubule formation, and increased [Ca2+](i), which could be suppressed by Ruthenium Red, an inhibitor of TRPV3, and TRPV3 silencing has similar effects. Furthermore, the up-regulated expression of PCNA, Cyclin D, Cyclin E and Cyclin A, the increased number of cells in G(2)/M and S phase, and the enhanced activation and expression of PI3K and AKT proteins induced by hypoxia and in presence of carvacrol (an agonist of TRPV3), was significantly attenuated by incubation of LY 294002, a specific inhibitor for PI3K/AKT. ConclusionsThese findings suggest that TRPV3 is involved in hypoxia-induced pulmonary vascular remodeling and promotes proliferation of PASMCs and the effect is, at least in part, mediated via the PI3K/AKT pathway.
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页数:13
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