Sodium tanshinone IIA sulfonate inhibits hypoxia-induced enhancement of SOCE in pulmonary arterial smooth muscle cells via the PKG-PPAR-γ signaling axis

Copyright © 2016 the American Physiological Society..

Our laboratory previously showed that sodium tanshinone IIA sulfonate (STS) inhibited store-operated Ca(2+) entry (SOCE) through store-operated Ca(2+) channels (SOCC) via downregulating the expression of transient receptor potential canonical proteins (TRPC), which contribute to the formation of SOCC (Wang J, Jiang Q, Wan L, Yang K, Zhang Y, Chen Y, Wang E, Lai N, Zhao L, Jiang H, Sun Y, Zhong N, Ran P, Lu W. Am J Respir Cell Mol Biol 48: 125-134, 2013). The detailed molecular mechanisms by which STS inhibits SOCE and downregulates TRPC, however, remain largely unknown. We have previously shown that, under hypoxic conditions, inhibition of protein kinase G (PKG) and peroxisome proliferator-activated receptor-γ (PPAR-γ) signaling axis results in the upregulation of TRPC (Wang J, Yang K, Xu L, Zhang Y, Lai N, Jiang H, Zhang Y, Zhong N, Ran P, Lu W. Am J Respir Cell Mol Biol 49: 231-240, 2013). This suggests that strategies targeting the restoration of this signaling pathway may be an effective treatment strategy for pulmonary hypertension. In this study, our results demonstrated that STS treatment can effectively prevent the hypoxia-mediated inhibition of the PKG-PPAR-γ signaling axis in rat distal pulmonary arterial smooth muscle cells (PASMCs) and distal pulmonary arteries. These effects of STS treatment were blocked by pharmacological inhibition or specific small interfering RNA knockdown of either PKG or PPAR-γ. Moreover, targeted PPAR-γ agonist markedly enhanced the beneficial effects of STS. These results comprehensively suggest that STS treatment can prevent hypoxia-mediated increases in intracellular calcium homeostasis and cell proliferation, by targeting and restoring the hypoxia-inhibited PKG-PPAR-γ signaling pathway in PASMCs.

Medienart:

E-Artikel

Erscheinungsjahr:

2016

Erschienen:

2016

Enthalten in:

Zur Gesamtaufnahme - volume:311

Enthalten in:

American journal of physiology. Cell physiology - 311(2016), 1 vom: 01. Juli, Seite C136-49

Sprache:

Englisch

Beteiligte Personen:

Jiang, Qian [VerfasserIn]
Lu, Wenju [VerfasserIn]
Yang, Kai [VerfasserIn]
Hadadi, Cyrus [VerfasserIn]
Fu, Xin [VerfasserIn]
Chen, Yuqin [VerfasserIn]
Yun, Xin [VerfasserIn]
Zhang, Jie [VerfasserIn]
Li, Meichan [VerfasserIn]
Xu, Lei [VerfasserIn]
Tang, Haiyang [VerfasserIn]
Yuan, Jason X-J [VerfasserIn]
Wang, Jian [VerfasserIn]
Sun, Dejun [VerfasserIn]

Links:

Volltext

Themen:

69659-80-9
Cyclic GMP-Dependent Protein Kinases
EC 2.7.11.12
Journal Article
PKG
PPAR gamma
PPAR gamma, rat
PPAR-γ
Phenanthrenes
Protein Kinase Inhibitors
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
SOCE
STS
TRPC
TRPC Cation Channels
Tanshinone II A sodium sulfonate
Transient receptor potential cation channel, subfamily C, member 1
Trpc6 protein, rat

Anmerkungen:

Date Completed 01.06.2017

Date Revised 24.07.2023

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1152/ajpcell.00252.2015

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM260489921