Systemic plasma levels of nitrite/nitrate (NOx) reflect brachial flow-mediated dilation responses in young men and women.

Abstract:

:1. The aim of the present study was to determine the relationship between plasma levels of nitrite/nitrite (NO(x)) and brachial flow-mediated dilation (FMD) in healthy young men and women. 2. Brachial artery FMD was assessed non-invasively using high-resolution ultrasound in 36 young men and women (21 +/- 3 years; 18 men and 18 women). Blood samples for NO(x) assays were collected from an indwelling venous catheter in the forearm following an overnight fast and a 36 h low-nitrate diet. 3. Plasma levels of NO(x) were related to peak brachial FMD% (r = 0.53; P = 0.001). The relationship was maintained when the brachial dilation was expressed as absolute diameter change (Deltamm; r = 0.51; P = 0.002) and when it was normalized (/s) to the mean shear rate (r = 0.50; P = 0.002). 4. The present study demonstrates a relationship between peak FMD in the brachial artery and plasma levels of NO(x) in young men and women. This relationship suggests that brachial FMD and/or plasma NO(x) may be used as markers of peripheral endothelial function.

authors

Casey DP,Beck DT,Braith RW

doi

10.1111/j.1440-1681.2007.04715.x

subject

Has Abstract

pub_date

2007-12-01 00:00:00

pages

1291-3

issue

12

eissn

0305-1870

issn

1440-1681

pii

CEP4715

journal_volume

34

pub_type

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