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PubMed1981

Long-term estrogenization in mammals. IV. Body, adrenal, and testes weights; polydipsia; food intake; vasopressin administration; and serum corticosterone levels in estrogenized male Evans rats.

In three experiments, the initial body weight losses after estrogenization were maintained or lagged the weight gains of the controls by the same amount over 61, 138, and 336 days, respectively. The mean serum corticosterone level of the controls was 56% that of the estrogenized rats 341 days after estrogenization. Water consumption (mg/kg b.w.) approximated 150% that of the controls several weeks following estrogenization, remaining elevated until the end of the experiment. Estrogen treatment produced a higher level of water intake in a few rats similar to that previously observed for mice. During the experimental period for water measurement, food consumption (g/kg b.w.) approximated 115% that of the controls. Gnawing and food-spilling behavior was observed in some of the estrogenized rats. Following vasopressin administration, food intake was lowered the first and second days in one estrogenized group; water intake was lowered the first day in the three control and estrogenized groups. In contrast to studies with Marsh mice, estrogenization did not produce bladder damage in Evans rats, but two showed tubular calcification in the kidneys.

Adrenal Glands↗