Gluconeogenesis in goat hepatocytes is affected by calcium, ammonia and other key metabolites but not primarily through cytosolic redox state.
1. Gluconeogenesis from propionate and lactate was studied in caprine hepatocytes. 2. Reducing cytosol with additions of ETOH, ammonium, or lactate decreased [2-14C]propionate conversion to glucose. 3. Calcium oxidized the cytosol and increased gluconeogenesis from propionate by 198% and from lactate by 220%. 4. Cells isolated from lactating does and wethers differed quantitatively in propionate conversion to glucose and response to calcium. 5. Acetoacetate decreased and 3-OH-butyrate slightly increased glucose production from propionate. 6. Neither ketone body had any significant effect on gluconeogenesis from lactate. 7. Results reported herein suggest gluconeogenesis from propionate is not limited by lack of cytosolic reducing equivalents.
D000625:Aminooxyacetic Acid / Q000494:pharmacology; D000643:Ammonium Chloride / Q000494:pharmacology*; D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D003600:Cytosol / Q000378:metabolism; D000431:Ethanol / Q000494:pharmacology; D005943:Gluconeogenesis / Q000187:drug effects*; D006041:Goats / Q000378:metabolism*; D007773:Lactates / Q000378:metabolism; D019344:Lactic Acid; D008099:Liver / Q000187:drug effects / Q000378:metabolism*; D010084:Oxidation-Reduction; D011422:Propionates / Q000378:metabolism; D017378:Quinolinic Acid; D011805:Quinolinic Acids / Q000494:pharmacology
D007773:Lactates; D011422:Propionates; D011805:Quinolinic Acids; D000643:Ammonium Chloride; D000625:Aminooxyacetic Acid; D019344:Lactic Acid; D000431:Ethanol; D017378:Quinolinic Acid; D002118:Calcium