Metabolic Effects and Fate of Succinic Acid Methyl Esters in Rat Hepatocytes
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1994
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Abstract
The metabolic fate and metabolic effects of succinic acid methyl esters were examined in rat isolated hepatocytes. Both the monomethyl ester (SAM) and dimethyl ester (SAD) of succinic acid inhibited D-glucose metabolism. Such an inhibition affected, in order of increasing severity, the direct incorporation of D-glucose into glycogen and futile cycling between the hexose and its 6-phosphate ester, the phosphorylation of D-glucose, the generation of triose phosphates from the hexose, and the production of 14C-labeled lactate, pyruvate, and amino acids from D-[U-14C]glucose and its oxidation. The dimethyl ester of [1,4-14C]succinic acid ([1,4-14C]SAD) or [2,3-14C]succinic acid ([2,3-14C]SAD) was efficiently converted to acidic metabolites. The oxidation of [1,4-14C]SAD largely exceeded that of [2,3-14C]SAD. Inversely the generation of newly formed radioactive D-glucose and glycogen appeared higher in cells exposed to [2,3-14C]SAD, rather than [1,4-14C]SAD. It is proposed that SAM and SAD are suitable nutrients both to cover the energy need of hepatocytes and to act as gluconeogenic precursors.
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malaisse1994archivesmetabolic
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| Authors | T.M. Zhang,A. Sener,W.J. Malaisse;T.M. Zhang;A. Sener;W.J. Malaisse; |
| Journal | archives of biochemistry and biophysics |
| Year | 1994 |
| DOI |
10.1006/abbi.1994.1428
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