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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Acinar distribution of glutathione-dependent detoxifying enzymes. Low glutathione peroxidase activity in perivenous hepatocytes.

The acinar distribution of glutathione S-transferase (GST), glutathione peroxidase (GPx), glutathione reductase (GR), and glucose-6-phosphate dehydrogenase (G-6-PDH) was examined by analyzing periportal (p.p.) and perivenous (p.v.) rat hepatocytes selectively isolated by the digitonin-collagenase perfusion. The cytosolic GST activity was higher in p.v. cells, but the microsomal GST and cytosolic GR were found to be evenly distributed in the acinus. In contrast, the activity of both the Se-dependent GPx and the microsomal (Se-independent) GPx, as well as G-6-PDH, was much lower in the p.v. than in the p.p. cells. The heterogeneous distribution of GST, GPx and G-6-PDH was confirmed by analyzing liver perfusion effluents collected after ante- or retrograde digitonin infusion. The relatively low activities of GPx and G-6-PDH in the p.v. cells could partly explain the susceptibility of this region to chemical injury.[1]

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