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The endocannabinoid 2-arachidonoylglycerol inhibits endothelial function and repair.

Abstract：

BACKGROUND:Endothelial dysfunction promotes atherogenesis, vascular inflammation, and thrombus formation. Reendothelialization after angioplasty is required in order to prevent stent failure. Previous studies have highlighted the role of 2-arachidonoylglycerol (2-AG) in murine experimental atherogenesis and in human coronary artery disease. However, the impact of 2-AG on endothelial repair and leukocyte-endothelial cell adhesion is still unknown. METHODS:Endothelial repair was studied in two treatment groups of wildtype mice following electrical injury of the common carotid artery. One group received the monoacylglycerol lipase (MAGL)-inhibitor JZL184, which impairs 2-AG degradation and thus causes elevated 2-AG levels, the other group received DMSO (vehicle). The effect of 2-AG on human coronary artery endothelial cell (HCAEC) viability, leukocyte-endothelial cell adhesion, surface expression of adhesion molecules, and expression of endothelial NO synthase (NOS3) was studied in vitro. RESULTS:Elevated 2-AG levels significantly impaired reendothelialization in wildtype mice following electrical injury of the common carotid artery. In vitro, 2-AG significantly reduced viability of HCAEC. Additionally, 2-AG promoted adhesion of THP-1 monocytes to HCAEC following pre-treatment of the HCAEC with 2-AG. Adhesion molecules (E-selectin, ICAM-1 and VCAM-1) remained unchanged in arterial endothelial cells, whereas 2-AG suppressed the expression of NOS3 in HCAEC. CONCLUSION AND TRANSLATIONAL ASPECT:Elevated 2-AG levels hamper endothelial repair and HCAEC proliferation, while simultaneously facilitating leukocyte-endothelial cell adhesion. Given that 2-AG is elevated in patients with coronary artery disease and non-ST-segment elevation myocardial infarction, 2-AG might decrease reendothelialization after angioplasty and thus impact the clinical outcomes.

journal_name

Int J Cardiol

journal_title

International journal of cardiology

authors

Jehle J,Eich L,Danisch M,Bagheri S,Avraamidou E,Pfeifer P,Tiyerili V,Bindila L,Lutz B,Nickenig G

doi

10.1016/j.ijcard.2020.08.042

subject

Has Abstract

pub_date

2021-01-15 00:00:00

pages

243-250

eissn

0167-5273

issn

1874-1754

pii

S0167-5273(20)33569-5

journal_volume

323

pub_type

杂志文章

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