ASIC1-mediated calcium entry stimulates NFATc3 nuclear translocation via PICK1 coupling in pulmonary arterial smooth muscle cells

被引:21
作者
Bosc, Laura V. Gonzalez [1 ]
Plomaritas, Danielle R. [1 ]
Herbert, Lindsay M. [1 ]
Giermakowska, Wieslawa [1 ]
Browning, Carly [1 ]
Jernigan, Nikki L. [1 ]
机构
[1] Univ New Mexico, Hlth Sci Ctr, Dept Cell Biol & Physiol, Vasc Physiol Grp, Albuquerque, NM 87131 USA
关键词
calcineurin; pulmonary hypertension; hypoxia; store-operated calcium; endothelin-1; DOMAIN PROTEIN PICK1; CHRONIC HYPOXIA; CA2+ ENTRY; REGULATING ACTIVATION; INTRACELLULAR CA2+; CHANNELS; CALCINEURIN; INHIBITION; ENDOTHELIN-1; HYPERTENSION;
D O I
10.1152/ajplung.00040.2016
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
ASIC1-mediated calcium entry stimulates NFATc3 nuclear translocation via PICK1 coupling in pulmonary arterial smooth muscle cells. Am J Physiol Lung Cell Mol Physiol 311:L48-L58, 2016. First published May 17, 2016; doi:10.1152/ajplung.00040.2016.-The development of chronic hypoxia (CH)-induced pulmonary hypertension is associated with increased pulmonary arterial smooth muscle cell (PASMC) Ca2+ influx through acid-sensing ion channel-1 (ASIC1) and activation of the Ca2+/calcineurin-dependent transcription factor known as nuclear factor of activated T-cells isoform c3 (NFATc3). Whether Ca2+ influx through ASIC1 contributes to NFATc3 activation in the pulmonary vasculature is unknown. Furthermore, both ASIC1 and calcineurin have been shown to interact with the scaffolding protein known as protein interacting with C kinase-1 (PICK1). In the present study, we tested the hypothesis that ASIC1 contributes to NFATc3 nuclear translocation in PASMC in a PICK1-dependent manner. Using both ASIC1 knockout (ASIC1(-/-)) mice and pharmacological inhibition of ASIC1, we demonstrate that ASIC1 contributes to CH-induced (1 wk at 380 mmHg) and endothelin-1 (ET-1)-induced (10(-7) M) Ca2+ responses and NFATc3 nuclear import in PASMC. The interaction between ASIC1/PICK1/calcineurin was shown using a Duolink in situ Proximity Ligation Assay. Inhibition of PICK1 by using FSC231 abolished ET-1-induced and ionomycin-induced NFATc3 nuclear import, but it did not alter ET-1-mediated Ca2+ responses, suggesting that PICK1 acts downstream of Ca2+ influx. The key findings of the present work are that 1) Ca2+ influx through ASIC1 mediates CH- and ET-1-induced NFATc3 nuclear import and 2) the scaffolding protein PICK1 is necessary for NFATc3 nuclear import. Together, these data provide an essential link between CH-induced ASIC1-mediated Ca2+ influx and activation of the NFATc3 transcription factor. Identification of this ASIC1/PICK1/NFATc3 signaling complex increases our understanding of the mechanisms contributing to the vascular remodeling and increased vascular contractility that are associated with CH-induced pulmonary hypertension.
引用
收藏
页码:L48 / L58
页数:11
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