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Lactate consumption by hepatocytes in mono layer culture

, : Lactate consumption by hepatocytes in mono layer culture. Proceedings of the Society for Experimental Biology & Medicine 166(3): 413-417

Hepatic lactate metabolism was studied in confluent primary hepatocyte monolayer cultures from fasted rats. The cultures were maintained in Krebs-Henseleit buffer containing 1% gelatin and 50 mM of Tricine and Hepes. Under standard conditions of pH 7.4, PO2 > 280 mm Hg and PCO2 of 22-27 mm Hg, little glucose or lactate was produced unless the media was made 10 mM with either fructose, dehydroxyacetone or pyruvate. While the addition of glucose did not lead to lactate production, added lactate was converted to glucose. Lactate use was unaffected by lowering the PO2 to 100 mm Hg but between 100-20 mm Hg lactate consumption was increasingly inhibited. At 20 mm Hg no lactate was consumed. At low pH, below 7.0, lactate use was inhibited. The effects of low pH and anoxia, separately and together, were readily reversed by returning the cultures to standard conditions. Varying the PCO2 from 4.4-101 mm Hg had no effect on lactate consumption.


PMID: 6782571

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