Differential vascular cell adhesion molecule-1 expression and superoxide production in simulated microgravity rat vasculature.

Abstract:

:Exposure to microgravity leads to orthostatic intolerance in astronauts and differential vascular structural and functional adaptations have been implicated in its occurrence. The present study tended to clarify the characteristics of vascular inflammation and oxidative stress in hindlimb unweighting (HU) rat vasculature. Male Sprague-Dawley rats were randomly divided into control (CON) and hindlimb unweighting (HU) groups. Three weeks later, immunohistochemistry was used to localize the expression of vascular cell adhesion molecule-1 (VCAM-1) and laser scanning confocal microscope were used to detect superoxide production. Immunohistochemical results revealed positive staining of VCAM-1 on endothelial cells in HU rat basilar and carotid arteries compared with CON, but not in abdominal aorta and femoral arteries. Meanwhile, HU increased O2·- levels in all the layers of basilar and carotid arteries from HU rat but not in abdominal aorta and femoral arteries from HU rat. These data suggested that differential expression of VCAM-1 and O2·- production were concomitant with the vascular adaptations to simulated microgravity and whether they participate in vascular structure and function remodeling merits further investigation.

journal_name

EXCLI J

journal_title

EXCLI journal

authors

Zhang R,Ran HH,Gao YL,Ma J,Huang Y,Bai YG,Lin LJ

subject

Has Abstract

pub_date

2010-12-23 00:00:00

pages

195-204

issn

1611-2156

journal_volume

9

pub_type

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