Arterial structure and function during and after long-duration spaceflight.

Journal of Applied Physiology
Stuart M C LeeMichael B Stenger

Abstract

Spaceflight missions expose astronauts to increased risk of oxidative stress and inflammatory damage that might accelerate the development of asymptomatic cardiovascular disease. The purpose of this investigation was to determine whether long-duration spaceflight (>4 mo) results in structural and functional changes in the carotid and brachial arteries. Common carotid artery (CCA) intima-media thickness (cIMT), CCA distensibility and stiffness, and brachial artery endothelium-dependent and -independent vasodilation were measured in 13 astronauts (10 men, 3 women) ~180 and 60 days before launch, during the mission on ~15, 60, and 160 days of spaceflight, and within 1 wk after landing. Biomarkers of oxidative stress and inflammation were measured at corresponding times in fasting blood samples and urine samples from 24- or 48-h pools. Biomarkers of oxidative stress and inflammation increased during spaceflight, but most returned to preflight levels within 1 wk of landing. Mean cIMT, CCA stiffness, and distensibility were not significantly different from preflight at any time. As a group, neither mean endothelium-dependent nor -independent vasodilation changed from preflight to postflight, but changes within individuals in endothel...Continue Reading

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Citations

Sep 26, 2020·Frontiers in Physiology·Nastassia NavasiolavaMarc-Antoine Custaud
Nov 17, 2020·Journal of Applied Physiology·Danielle K GreavesRichard L Hughson
Nov 17, 2020·Journal of Applied Physiology·Stuart M C LeeMichael B Stenger
Apr 28, 2021·Journal of Environmental Science and Health. Part C, Toxicology and Carcinogenesis·Jeffrey S WilleyXiao Wen Mao
Aug 26, 2021·Physiology·Scott M Smith, Sara R Zwart

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Methods Mentioned

BETA
ISS
urine collections
ELISA
ELISAs
urine collection
blood
urine sample collections

Software Mentioned

CHARM
Stata
ISS FIT
MATLAB
Astro

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