Ethanol modulates coronary permeability to macromolecules in murine AIDS.
OBJECTIVE
The cardiovascular complications of AIDS are serious. However, the underlying mechanisms are unclear. Less is known about how ethanol affects the coronary microcirculation in individuals with AIDS. The aim of this study was to assess the integrity of the coronary microcirculation in murine AIDS mice in the presence or absence of chronic ethanol consumption.


METHODS
Four groups were studied: control, murine AIDS, ethanol and ethanol plus murine AIDS. Mouse hearts were prepared for direct visualization of the coronary microcirculation and quantification of trans-coronary macromolecular leakage. Hearts were isolated and perfused with diluted rat blood containing fluorescein isothiocyanate-albumin (FITC-BSA). Coronary vessels were observed using intravital fluorescence microscopy after 5, 15 and 25 min of perfusion. The mean luminosity of outside/inside coronary vessels (O/I ratio) was used to quantify FITC-BSA leakage.


RESULTS
We found that the mean O/I ratio for the murine AIDS group was significantly greater than in the control group and also significantly increased during the perfusion period. Chronic ethanol consumption did not alter coronary permeability to macromolecules, but improved the coronary haemodynamics in murine AIDS.


CONCLUSIONS
These findings suggest that murine AIDS impairs the structural and functional coronary endothelium, and moderate ethanol consumption modulates the function of the coronary microcirculation.
Chen
Yinhong
Y
Divison of Health Prevention Science, College of Public Health, School of Medicine, University of Arizona, Tucson, AZ 85724, USA.
Davis-Gorman
Grace
G
Watson
Ronald R
RR
McDonagh
Paul F
PF
D000163:Acquired Immunodeficiency Syndrome / Q000503:physiopathology*; D000704:Analysis of Variance; D000818:Animals; D002492:Central Nervous System Depressants / Q000494:pharmacology*; D003326:Coronary Circulation / Q000187:drug effects* / Q000502:physiology; D000431:Ethanol / Q000494:pharmacology*; D005260:Female; D046911:Macromolecular Substances; D051379:Mice; D008810:Mice, Inbred C57BL; D008833:Microcirculation / Q000187:drug effects* / Q000502:physiology; D008856:Microscopy, Fluorescence; D010539:Permeability
D002492:Central Nervous System Depressants; D046911:Macromolecular Substances; D000431:Ethanol