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Perfusing a rat liver with digitonin in the concentration range 2-20 mg/ml results in complete decolorization of the organ within 45-250 s. Decolorization progresses with time in the direction of flow, and it is therefore possible, by collecting the eluate, to obtain material from specific intracellular compartments of hepatocytes in different zones in the microcirculatory unit of the liver. The results demonstrate that cytoplasmic marker enzymes from periportal or perivenous hepatocytes can be collected with as little contamination from the other compartment as is obtained in micro-dissection studies. Furthermore, a fraction enriched in mitochondrial marker enzymes can be achieved with only 10-20% contamination by cytoplasmic material.

Digitonin perfusion of rat liver. A new approach in the study of intra-acinar and intracellular compartmentation in the liver