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Originally Posted by
Swifto
I've said this a million times, but becuase on how prolactin is regulated (by estrogen) if you control estrogen, you will control prolactin. Its called the Long Feedback Mechanism.
Here is some data supporting my theory:
Clin Endocrinol (Oxf) 1982 Nov;17(5):495-9 Related Articles, Links
Hydrotestolactone lowers serum oestradiol and PRL levels in normal men: evidence of a role of oestradiol in prl secretion.
D'Agata R, Aliffi A, Maugeri G, Mongioi A, Vicari E, Gulizia S, Polosa P.
The effect on serum PRL levels of lowering serum oestradiol (E2) concentration by short-term administration of an aromatase activity inhibitor, hydrotestolactone (HT), was studied in six healthy male subjects. After HT administration serum E2 levels decreased from 68 +/- 5.8 to 26 +/- 2.5 pmol/l (mean +/- SE, P less than 0.05). These E2 changes were accompanied by a significant decrease in mean 2-h PRL levels from 11.2 +/- 2.1 to 6.5 +/- 1.6 ng/ml mean +/- SE, P less than 0.05) . The evaluation of individual percentage change from basal concentrations showed a varying decrease in all subjects. These findings suggest that under physiological conditions E2 may be one of the factors which control blood PRL concentrations in men.
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Acta Endocrinol (Copenh) 1984 Feb;105(2):167-72
Testosterone-induced hyperprolactinaemia in a patient with a disturbance of hypothalamo-pituitary regulation.
Nicoletti I, Filipponi P, Fedeli L, Ambrosi F, Gregorini G, Santeusanio F.
A case of a patient with hypopituitarism due to a disturbance of hypothalamo-pituitary regulation is presented, who developed high-grade hyperprolactinaemia after the initiation of substitutive therapy with testosterone esthers.The increase in serum Prl was strictly related to testosterone aromatization to oestradiol, since anti-oestrogen compounds were effective in reducing (clomiphene) or abolishing (tamoxifen) the enhanced Prl secretion. The oestrogen effect in raising Prl release was not attributable to a reduction in the dopamine inhibition of Prl-secreting cells, as the dopamine-antagonist domperidone failed to increase Prl serum levels in the same patient. This suggests that, in man, the oestrogen effect in enhancing Prl release is mainly enacted directly on the pituitary lactotrophs rather than exerted through a reduction in the hypothalamic dopamine activity
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Effect of androgenic anabolic steroids on sperm quality and serum hormone levels in adult male bodybuilders.
Torres-Calleja J, Gonzalez-Unzaga M, DeCelis-Carrillo R, Calzada-Sanchez L, Pedron N.
Unidad de Investigacion Medica en Biologia de la Reproduccion, Instituto Mexicano del Seguro Social, Mexico, DF.
The purpose of this study was to assess the influence of the administration of high doses of androgenic anabolic steroids (AAS) on endocrine and semen parameters. Thirty volunteering bodybuilders were studied (ages ranging between 26.6 +/- 4.1 years). A history of anabolic steroid administration was recorded for fifteen subjects, and results of semen analysis and endocrine parameters were compared with data from fifteen bodybuilders not using steroids. In those subjects using AAS, eight had sperm counts under the lower normal limit (20 x 10(6) sperm/ml), three had azoospermia, two polyzoospermia, and two had normal sperm counts. The percentage of morphologically normal sperm was significantly reduced, only 17.7% had normal spermatozoa. In the control group, only one subject had oligozoospermia.The hormonal parameters revealed reduced FSH (1.5 +/- 3.2 vs 5.0 +/- 1.6, p < 0.001) and PRL (5.1 +/- 4.9 vs 9.2 +/- 4.4, p < 0.01) levels. LH, T, E2 and DHEA levels did not vary.