Dissociation between sleep-related and TRH-induced prolactin secretion in seminiferous tubule failure

I. M. Spitz*, P. Lavie, N. Calderon, C. R. Gordon, A. Oksenberg, M. Ron, N. Laufer, Y. Livshin, J. Schenker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Prolactin (PRL) secretion has been measured during sleep and following TRH administration in 8 patients aged 24-39 yr with seminiferous tubule failure and 36 controls. Basal LH levels were 25.7 ± 14.7 mIU/ml in the patients compared to 11.5 ± 4.2 mlU/ml in the controls (p < 0.01). Corresponding FSH levels were 26.2 ± 10.7 mIU/ml and 5.9 ± 2.1 mIU/ml (p < 0.001). Mean estradiol 17B and testosterone levels were similar in the 2 groups. The mean PRL secretion during sleep was 16.5 ± 11.7 ng/ml in the patients and not different in 11 of the controls (12.4 ± 3.2 ng/ml). One patient had a mean nocturnal PRL concentration of 44.1 ng/ml. In both groups, the mean sleep related PRL concentration was greater than that during waking hours. The average number of peaks in the 2 groups was similar. In the same patients, the peak PRL response to TRH (200 ug IV) was 81.9 ± 18.8 ng/ml as compared to 32.1 ± 10.7 ng/ml in the controls (p < 0.001). It is concluded that PRL concentrations following pharmacological stimulation are increased in seminiferous tubule failure, whereas levels are normal in relation to the physiological stimulus of sleep.

Original languageEnglish
Pages (from-to)10-13
Number of pages4
JournalMetabolism: Clinical and Experimental
Volume31
Issue number1
DOIs
StatePublished - Jan 1982
Externally publishedYes

Funding

FundersFunder number
Wolinsky Bessin Research Fund
Ministry of Health, State of Israel

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