PMID: 6539290May 1, 1984Paper

Alterations in endothelial fenestrations in liver sinusoids of baboons fed alcohol: a scanning electron microscopic study

Hepatology : Official Journal of the American Association for the Study of Liver Diseases
K M Mak, C S Lieber

Abstract

The effects of chronic alcohol consumption on the ultrastructure of endothelial fenestrations in liver sinusoids were studied by scanning electron microscopy in surgical liver biopsies of 16 baboons pair-fed with nutritionally adequate diets containing alcohol or isocaloric carbohydrate for up to 112 months. Alcohol consumption for 4 to 24 months resulted in a decreased number of fenestrations (1.4 per micron 2 of the endothelial surface vs. 3.3 in pair-fed controls; p less than 0.01) and an increase in their geometric mean diameter (115.6 vs. 82.3 nm in controls; p less than 0.001). After 61 to 112 months of alcohol feeding, the number of fenestrations was 1.9 (vs. 4.6 in controls; p less than 0.005) and the fenestration diameter was 91.8 nm (vs. 76.7 nm in controls; p less than 0.01). The fractional areas occupied by the fenestrations on the endothelial surface of the sinusoids in baboons fed alcohol for 4 to 24 and 61 to 112 months were calculated to be 84 and 58% of their respective controls. The alterations in the sinusoidal endothelium revealed in this study are most likely associated with a disturbance in the exchanges between the sinusoidal blood stream and the liver parenchyma and may thereby contribute to alcohol-indu...Continue Reading

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