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Liver sinusoidal endothelial cells (LSECs) possess fenestrae arranged in sieve plates. Hepatic endothelial fenestrae are open pores approximately 100 to 200 nm in diameter. Alterations in their number or diameter by hormones, xenobiotics, and diseases have important implications for hepatic microcirculation and function. Numerous reports of hepatotoxin-induced defenestration suggest that the cytoskeleton...
Age-related impairment of drug metabolism by the liver is consistent with hepatocyte hypoxia, suggestive of the development of a diffusional barrier to oxygen supply. Because the effects of aging on the diffusional pathway (sinusoidal endothelium and space of Disse) have not been described, we performed comparative studies on the livers of Fischer F344 rats aged 4 to 7, 12 to 15, and 24 to 27 months...
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