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  • Title: Glucose metabolism in insulin administered euthyroid, hypothyroid and hyperthyroid rats.
    Author: Chandra AK, Mukherjee AK.
    Journal: Endocrinol Jpn; 1985 Aug; 32(4):447-53. PubMed ID: 3910410.
    Abstract:
    Glucose metabolism was studied as evidenced by the sugar and pyruvic acid levels in blood and glycogen and pyruvic acid content of tissues in euthyroid, hypothyroid and hyperthyroid rats by giving insulin. Results show that in a normal thyroxine-excess insulin state, the rise in blood sugar was less, glycogenesis was much enhanced and glycolysis was reduced in comparison to these data in the euthyroid state. When tyroxine deficiency was associated with excess insulin, glycogenesis was enhanced further and an almost complete inhibition of glycolysis was observed. In excess thyroxine-excess insulin state glycogenesis was increased at the expense of glycolysis in comparison to the finding in the hyperthyroid state. Thus exogenous insulin in the euthyroid state altered the pattern of carbohydrate metabolism enhancing glycogenesis and inhibiting glycolysis. In a low thyroxine-excess insulin state, further enhancement of glycogenesis and inhibition of glycolysis were observed. But in an excess thyroxine-excess insulin state, the higher thyroxine activity was somewhat neutralized by higher insulin action allowing glycogenesis with glucose to proceed to some extent.
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