Interleukin-10 released by CD4(+)CD25(+) natural regulatory T cells improves microvascular endothelial function through inhibition of NADPH oxidase activity in hypertensive mice.

ABSTRACT:

Objective

We previously demonstrated that a reduced number of CD(4+)CD(25+)-regulatory T cells (Tregs) was associated with microvascular dysfunction in hypertension. However, the underlying mechanism by which Tregs regulate vascular endothelial function remains unknown.

Methods and results

Control and interleukin (IL)-10(-/-) knockout mice were infused with angiotensin II (400 ng/kg/min) for 2 weeks (hypertensive [HT] and HT-IL-10(-/-)). Endothelium-dependent relaxation (EDR) in response to acetylcholine was significantly reduced in mesenteric resistance artery (MRA) from HT and HT-IL-10(-/-) compared with control and IL-10(-/-) mice. Importantly, the incubation of MRA from HT mice with the conditioned media of cultured Tregs, isolated from control mice, reduced NADPH oxidas

SUBMITTER: Kassan M 

PROVIDER: S-EPMC3571694 | biostudies-literature | 2011 Nov

REPOSITORIES: biostudies-literature