Abstract
Although a considerable amount of work has addressed the short-term consequences of sucrose ingestion on a variety of morphological, physiological and hematological measures, relatively few studies have investigated these parameters following long-term sucrose intake. Results of the present experiments indicated that female rats given ad libitum access to a 10% sucrose solution for 9 months were conspicuously larger and had significantly heavier thyroid and spleen weights compared to rats offered either a restricted (20 min) daily sucrose option or control rats given only water. Rats given free access to sucrose also displayed abnormal serum levels of creatinine, sodium, phosphorus, alkaline phosphatase, alanine aminotransferase, uric acid and cholesterol which could indicate dysfunction in many organs including the kidney and liver. In the brain, however, chronic sucrose access was not associated with any discernable changes in neuronal or glial cell density within selected brain regions, but brain weight was found to be highly negatively correlated (r = −0.97) with total sucrose intake. Finally, we report that high doses of estradiol can significantly attenuate the intake of sucrose in female rats. Together these findings demonstrate that free access to a sucrose solution for long periods can induce profound effects on rat physiology and may have important implications for the management of diet in humans.
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