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The impact of hyper-and hypothyroidism on prostatic glycosidases was investigated. Hyper-thyroidism was induced by administering L-thyroxine (25 lg/100 g body weight/day) for 60 days and hypothyroidism was induced by total thyroidectomy. To test the direct in¯uence of thyroid hormones, prostatic lobes were incubated with different concentrations (10, 25 and 50 ng/mL) of T 3 and b-N-acetylglucosaminidase and b-N-acetylgalactosaminidase were assayed. Serum levels of thyroid hormones, oestradiol and testosterone increased in hyperthyroid, and decreased in hypothyroid rats. TSH decreased in hyperthyroid, and an opposite trend was seen in thyroidectomized, rats. Prostatic [anterior (coagulating glands), dorsolateral and ventral prostates] bglucosidase, b-galactosidase, b-N-acetylglucosaminidase and b-N-acetylgalactosaminidase activities increased uniformly in hyperthyroid, and decreased in thyroidectomized, rats. In vitro studies showed a dose-dependent stimulatory effect of T 3 on b-N-acetylglucosaminidase and b-N-acetylgalactosaminidase in all three lobes of the prostate. From the present study, it is concluded that hyperthyroidism augments and hypothyroidism inhibits prostatic glycosidases and T 3 has a direct stimulatory effect on these enzymes.

The impact of hyper- and hypothyroidism on prostatic glycosidases was investigated. Hyper-thyroidism was induced by administering L-thyroxine (25 micrograms/100 g body weight/day) for 60 days and hypothyroidism was induced by total thyroidectomy. To test the direct influence of thyroid hormones, prostatic lobes were incubated with different concentrations (10, 25 and 50 ng/mL) of T3 and beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase were assayed. Serum levels of thyroid hormones, oestradiol and testosterone increased in hyperthyroid, and decreased in hypothyroid rats. TSH decreased in hyperthyroid, and an opposite trend was seen in thyroidectomized, rats. Prostatic [anterior (coagulating glands), dorsolateral and ventral prostates] beta-glucosidase, beta-galactosidase, beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase activities increased uniformly in hyperthyroid, and decreased in thyroidectomized, rats. In vitro studies showed a dose-dependent stimulatory effect of T3 on beta-N-acetylglucosaminidase and beta-N-acetylgalactosaminidase in all three lobes of the prostate. From the present study, it is concluded that hyperthyroidism augments and hypothyroidism inhibits prostatic glycosidases and T3 has a direct stimulatory effect on these enzymes.

No abstract