Abstract
Diabetes was induced in male Sprague-Dawley (S-D) rats by streptozotocin (STZ) administration. Following STZ injection, plasma glucose levels in the treated rats were significantly elevated from values of untreated controls. Over the experimental period (140 days) plasma testosterone (T) levels, prostatic nuclear androgen receptor (AR) contents and prostatic weights declined with increasing age in the rats. The declines in both STZ-treated and untreated rats were similar in manner and no notable differences were discerned in the data obtained from the two groups. On the contrary, prostatic cytosolic AR contents in untreated rats remained unchanged with advancing age, but was reduced to 50% of normal control values in diabetic rats following STZ treatment. Correlation analyses revealed that prostatic nuclear AR contents correlated positively with plasma T levels while prostatic cytosolic AR contents correlated negatively with plasma glucose levels. These data support former claims that prostatic nuclear AR content is dependent on circulating T level and suggest a possible link between prostatic cytosolic AR content and plasma glucose concentrations.
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