Pharmacologic inhibition of transient receptor channel vanilloid 4 attenuates abdominal aortic aneurysm formation.
Pharmacologic inhibition of transient receptor channel vanilloid 4 attenuates abdominal aortic aneurysm formation.
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DOI：
10.1096/fj.202000251r
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发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
Sharma AK
中科院分区：
文献类型：
--
作者：
Shannon AH;Elder CT;Lu G;Su G;Mast A;Salmon MD;Montgomery WG;Spinosa MD;Upchurch GR Jr;Sharma AK
Abdominal aortic aneurysm (AAA) formation is characterized by inflammation, leukocyte infiltration and vascular remodeling. This study investigates the role of TRPV4 channels, which are transmembrane calcium channels that can regulate vascular tone, in modulating AAA formation. The elastase-treatment model of AAA in C57BL6 (WT) mice and Angiotensin II treatment model in ApoE−/− mice were used to confirm our hypotheses. Administration of a specific TRPV4 antagonist, GSK2193874, in elastase-treated WT mice and in AngII-treated ApoE−/− mice caused a significant attenuation of aortic diameter, decrease in pro-inflammatory cytokines (IL-1β, IL-6, IL-17, MCP-1, MIP-1α, MIP-2, RANTES, and TNF-α), inflammatory cell infiltration (CD3+ T cells, macrophages and neutrophils), elastic fiber disruption and an increase in smooth muscle cell α-actin expression compared to untreated mice. Similarly, elastase-treated TRPV4−/− mice had a significant decrease in AAA formation, aortic inflammation and vascular remodeling compared to elastase-treated WT mice on day 14. In vitro studies demonstrated that inhibition of TRPV4 channels mitigates aortic smooth muscle cell-dependent inflammatory cytokine production as well as decreases neutrophil transmigration through aortic endothelial cells. Therefore, our results suggest that TRPV4 antagonism can attenuate aortic inflammation and remodeling via decreased smooth muscle cell activation and neutrophil transendothelial migration during AAA formation.
