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- W1975829294 abstract "Procedures for the isolation and enrichment of cell populations from suspensions of rat kidney cortical cells were developed. Using Percoll density-gradient centrifugation, two populations of cells were obtained; marker enzymes [alkaline phosphatase and gamma-glutamyltransferase for proximal tubular (PT) cells and hexokinase for distal tubular (DT) cells] and functional responses (stimulation of PT cell oxygen consumption by succinate and inhibition of DT cell oxygen consumption by amiloride) were then employed to identify and assess the purity of the two fractions. The PT cell fraction was estimated to contain 97% PT cells and the DT cell fraction was estimated to contain 88% DT cells. Staining with toluidine blue and light microscopy showed that PT cells contained a brush border, were larger than DT cells, and had more intensely staining nuclei than DT cells. To demonstrate the usefulness of these cell preparations in the study of biochemical mechanisms of renal cell injury, time- and concentration-dependent effects of the PT cell-specific nephrotoxin cephaloridine (CPH) on PT and DT cell trypan blue exclusion were examined. CPH was toxic in PT cells but not in DT cells; viability of PT cells incubated with 0.1 or 1 mM CPH for 2 h was 57 or 34%, respectively, compared to 81% for control cells; viability of DT cells incubated with 0.1 or 1 mM CPH for 2 h was 74 or 71%, respectively, compared to 74% for control cells. This method thus provides highly enriched preparations of freshly isolated PT and DT cells that retain their unique properties and are suitable for studies of biochemical mechanisms of chemical toxicity and nephron heterogeneity." @default.
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- W1975829294 date "1989-11-01" @default.
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- W1975829294 title "Isolation of two distinct populations of cells from fat kidney cortex and their use in the study of chemical-induced toxicity" @default.
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- W1975829294 doi "https://doi.org/10.1016/0003-2697(89)90593-9" @default.
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