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- W2099012288 abstract "In order to determine whether the benign prostatic hypertrophy (BPH) adenoma is responsible for low serum LH levels in patients with this disease, we measured FSH, LH and prolactin in sera collected from patients before and 0.8–2.2 years after retro-pubic prostatectomy, but found no change in their levels. Pituitary stimulation tests were therefore conducted to evaluate the pituitary hormone reserve in normal elderly men, and BPH patients before and after removal of the BPH adenoma. Blood was drawn 20 min before and during the administration of 100 μg LHRH and 200 μg TRH, as a single intravenous injection, and after 20, 60 and 120 min. Serum FSH, LH, TSH and prolactin were estimated by radioimmunoassays. Prior to prostatectomy, patients with BPH had significantly lower levels of serum LH, but not FSH, TSH or prolactin, as compared to normal men 20 min before the test. Serum LH in the BPH group after prostatectomy (1–2.75 years) was not statistically different from that of normal age-matched men, but the mean level more closely resembled that of the untreated BPH group. Although there were no significant differences in serum levels of FSH or prolactin between subject groups during stimulation, levels of LH and TSH in untreated BPH patients' serum were significantly lower than those of normal men. The BPH patients after prostatectomy resembled the normal men under these circumstances, and the serum levels of TSH in these ex-BPH patients were significantly higher than in untreated BPH patients. Similarly, the maximum LH and TSH responses to the hypothalamic releasing hormones were also significantly lower in the BPH patients as compared to normal age-matched men, and evidently return to normal 1–2.75 years after prostatectomy. No statistically significant differences were observed in the FSH and prolactin responses to LHRH and TRH between groups. The results suggest that a factor originating from the BPH adenoma, such as 5α-dihydrotestosterone, may be responsible for the suppression of pituitary LH and TSH responses to LHRH and TRH, respectively. It also appears that the pituitary of BPH patients does not regain its full secretory potential after the BPH adenoma has been removed, or that an additional factor may regulate pituitary LH secretion in the untreated and ex-BPH patients at the hypothalamic level." @default.
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- W2099012288 date "1979-06-01" @default.
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- W2099012288 title "THE HORMONAL STATUS OF PATIENTS WITH BENIGN PROSTATIC HYPERTROPHY: FSH, LH, TSH AND PROLACTIN RESPONSES TO RELEASING HORMONES" @default.
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- W2099012288 doi "https://doi.org/10.1111/j.1365-2265.1979.tb02113.x" @default.
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