Dorsolateral prostatic phosphomonoesterases and adenosine triphosphatases in hypo- and hyperthyroid rats.

Specific activities of phosphomonoesterases (acid and alkaline phosphatases) and adenosine triphosphatases (Mg2+, Ca2+ and Na+/K+ dependent ATPases) of dorsolateral prostate were studied in albino rats, under altered thyroid hormone status. Thyroidectomy induced hypothyroidism and thyroxine administered hyperthyroidism (25 micrograms/100 g body wt/day for 60 days, im) showed no impact on the activity of acid phosphatase. Three fold decrease in the activity of alkaline phosphatase was observed in hyperthyroid group. Ca2+ and Mg2+ dependent ATPases were significantly decreased in hypo- and hyperthyroid status whereas Na+/K+ ATPase was decreased in hyperthyroidism and showed an opposite trend in hypothyroid group.

Influence of thyroidectomy on seminal vesicular glycosidases of young albino rats.

Impact of thyroidectomy (hypothyroidism) on few glycosidases was studied in the seminal vesicles of young albino rats. Thyroidectomy was performed at 30 days post partum. Seminal vesicular beta-D-glucosidase, beta-D-galactosidase, and N-acetyl-beta-D-galactosaminidase exhibited a similar response of decreased activities under short- (30 days) and long-term (60 days) hypothyroid conditions. On the other hand, N-acetyl-beta-D-glucosaminidase registered a temporal biphasic response of increased and decreased activities in the seminal vesicles of rats subjected to short- and long-term hypothyroidism, respectively. The data obtained in the present study suggest that thyroid hormones have specific influences on different glycosidases in the seminal vesicles of rats and euthyroid status is essential for the maintenance of normal activities of these enzymes.

Impact of hyperprolactinaemia on testicular neutral lipids and phospholipids in mature bonnet monkeys, Macaca radiata (Geoffroy).

Impact of hyperprolactinaemia, induced by daily injection of ovine prolactin (250 micrograms/kg body weight, ip for 30 days) on testicular lipids was studied in M. radiata. Wet weights of testis and accessory sex organs decreased in hyperprolactinaemic monkeys. Even though total lipids in the testis did not show any significant change, total cholesterol and total glyceride glycerol decreased. While all fractions of testicular neutral lipids showed a perceptible decrease, phosphatidic acid, phosphatidyl ethanolamine and phosphatidyl choline increased in hyperprolactinaemic monkeys. Hyperprolactinaemia appears to influence male fertility by altering the composition of testicular neutral lipids and phospholipids.