scholarly journals EFFECT OF COPULATION ON POTENTIALLY PRECANCEROUS PROSTATE LESIONS, SERUM TESTOSTERONE AND PROLACTIN LEVELS IN RATS

2016 ◽  
Vol 38 (2) ◽  
pp. 73-79 ◽  
Author(s):  
D Herrera-Covarrubias ◽  
M B Tecamachaltzi-Silvaran ◽  
M Barradas-Moctezuma ◽  
J B Rosales-Raya ◽  
J Manzo ◽  
...  
Keyword(s):  
Testosterone Propionate ◽  
Precancerous Lesions ◽  
Serum Testosterone ◽  
Physical Contact ◽  
Ventral Prostate ◽  
Group Control ◽  
Reproductive Gland ◽  
Hormone Analysis ◽  
Subcutaneous Implant ◽  
10Th Trial

The prostate is an exocrine reproductive gland that participates in ejaculation and it is prone to diseases, including cancer. Aim: In the present study, we assessed the long­term effects of copulation on the development of precancerous lesions in rats, and compared them with testosterone­induced prostatic lesions. Materials and Methods: One group of Wistar males was given 10 copulatory sessions to one ejaculation with ovariectomized, hormone­primed females. Sessions occurred twice per week for a total of ten trials. A second group was exposed to females during the same trials, but physical contact was prevented. In addition, each group received a subcutaneous implant in the back either filled with testosterone propionate (T, 100 mg/kg) or empty. This resulted in four subgroups: 1) Control + No sex, 2) Control + Sex, 3) T + No sex and 4) T + Sex. Two days after the 10th trial all the males were sacrificed for prostate histo logy (H&E) and hormone analysis (testosterone and prolactin). Results: Males from the group Control + No sex expressed normal histo logy. However, those in the groups Control + Sex and T + No sex expressed metaplasia and dysplasia in both the dorsolateral and ventral portions of the prostate, respectively. Interestingly, males from the group T + Sex expressed dysplasia in the dorsolateral prostate only, but not in the ventral prostate. Conclusions: These results indicate that constant copulation may facilitate the development of prostatic lesions in males with normal levels of testosterone. However, copulation induces less lesions in the ventral prostate of males treated with testosterone.

scholarly journals Altered sexual differentiation of hepatic uridine diphosphate glucuronyltransferase by neonatal hormone treatment in rats

1979 ◽  
Vol 180 (2) ◽  
pp. 313-318 ◽  
Author(s):  
Coral A. Lamartiniere ◽  
Cindy S. Dieringer ◽  
Etsuko Kita ◽  
George W. Lucier
Keyword(s):  
Enzyme Activity ◽  
Adult Male ◽  
Sexual Differentiation ◽  
Reproductive Tract ◽  
Testosterone Propionate ◽  
Hormone Treatment ◽  
Male Rats ◽  
Ventral Prostate ◽  
Uridine Diphosphate ◽  
Neonatal Administration

The hepatic microsomal enzyme UDP-glucuronyltransferase undergoes a complex developmental pattern in which enzyme activity is first detectable on the 18th day of gestation in rats. Prepubertal activities are similar for males and females. However, postpubertal sexual differentiation of enzyme activity occurs in which male activities are twice those of females. Neonatal administration of testosterone propionate or diethylstilboestrol to intact animals resulted in lowered UDP-glucuronyltransferase activity in liver microsomal fractions of adult male rats, whereas no changes were observed in the adult females and prepubertal male and female animals. Neonatal administration of testosterone propionate and diethylstilboestrol adversely affected male reproductive-tract development as evidenced by decreased weights of testes, seminal vesicles and ventral prostate. Diethylstilboestrol also markedly decreased spermatogenesis. Hypophysectomy of adult male rats resulted in negative modulation of microsomal UDP-glucuronyltransferase and prevented the sexual differentiation of enzyme activity. In contrast hypophysectomy had no effect on female UDP-glucuronyltransferase activity. A pituitary transplant under the kidney capsule was not capable of reversing the enzyme effects of hypophysectomy, therefore suggesting that the male pituitary factor(s) responsible for positive modulation of UDP-glucuronyltransferase might be under hypothalamic control in the form of a releasing factor. Neonatal testosterone propionate and diethylstilboestrol administration apparently interfered with the normal sequence of postpubertal UDP-glucuronyltransferase sexual differentiation.

scholarly journals Ovarian intratumoral 21-hydroxylase deficiency in a postmenopausal hirsute woman

2012 ◽  
Vol 56 (9) ◽  
pp. 672-676 ◽  
Author(s):  
Selma B. Souto ◽  
Pedro V. Baptista ◽  
Filomena Barreto ◽  
Pedro F. Sousa ◽  
Daniel C. Braga ◽  
...  
Keyword(s):  
Histopathological Examination ◽  
Serum Testosterone ◽  
Serum Levels ◽  
Left Ovary ◽  
Serum Testosterone Level ◽  
Hydroxylase Deficiency ◽  
Postoperative Serum ◽  
17 Hydroxyprogesterone ◽  
21 Hydroxylase Deficiency ◽  
Hormone Analysis

Virilising ovarian tumours are a rare cause of hyperandrogenism in women, accounting for less than 5% of all ovarian neoplasms. It occurs most often in - and postmenopausal women. We report a case of a 64 year-old woman with signs of virilisation that had started 3 years before. Blood hormone analysis revealed increased levels of testosterone, and 17-hydroxyprogesterone. The tetracosactin test revealed 21-hydroxylase deficiency. Radiological imaging demonstrated a nodule in her left ovary. The patient was submitted to bilateral laparoscopic oophorectomy, and histopathological examination revealed a luteoma of the left ovary. Postoperative serum testosterone level and 17-hydroxyprogesterone returned to normal levels in one month. Virilism regressed within six months. Our patient also showed an elevation in 17-OHP serum levels. Normalization of 17-OHP after oophorectomy suggests a case of intratumoral 21-hydroxylase deficiency. To our knowledge, this is the first description of ovarian intratumoral 21-hydroxylase deficiency in a postmenopausal woman. Arq Bras Endocrinol Metab. 2012;56(9):672-6

INHIBITORY ACTION OF CORTISONE ON TESTOSTERONE-INDUCED GROWTH OF THE VENTRAL PROSTATE, THE DORSOLATERAL PROSTATE, THE COAGULATING GLANDS AND THE SEMINAL VESICLES IN CASTRATED ADRENALECTOMIZED RATS

1972 ◽  
Vol 69 (2) ◽  
pp. 359-368 ◽  
Author(s):  
Lars-Eric Tisell
Keyword(s):  
Inhibitory Action ◽  
Testosterone Propionate ◽  
Reproductive Organs ◽  
Inhibitory Effect ◽  
Seminal Vesicles ◽  
Male Rats ◽  
Ventral Prostate ◽  
Adrenal Steroids ◽  
Androgenic Effect ◽  
Adrenalectomized Rats

ABSTRACT The weight and histology of the ventral and dorsolateral prostate, the coagulating glands and the seminal vesicles were studied in castrated non-adrenalectomized male rats after sixteen days of daily injections of testosterone propionate and in castrated adrenalectomized rats after daily injections of testosterone propionate alone or in combination with cortisone. Testosterone propionate was given in daily doses of 0.020 mg and cortisone in daily doses of 1 mg, 3 mg or 9 mg. Testosterone alone induced a less pronounced growth of the dorsolateral prostate, the coagulating glands and the seminal vesicles in castrated non-adrenalectomized than in castrated adrenalectomized rats, suggesting an inhibitory effect of adrenal steroids on the action of testosterone. Cortisone which has a weak androgenic effect when given alone, partially counteracted the testosterone induced growth of the accessory reproductive organs in castrated adrenalectomized rats.

Effect of diazepam on serum testosterone and the ventral prostate gland in male rats

1979 ◽  
Vol 3 (1) ◽  
pp. 31-35 ◽  
Author(s):  
P. S. Cook ◽  
M. Notelovitz ◽  
P. S. Kalra ◽  
S. P. Kalra
Keyword(s):  
Prostate Gland ◽  
Serum Testosterone ◽  
Male Rats ◽  
Ventral Prostate

HYPOTHALAMIC-PITUITARY-TESTICULAR SYSTEM FOLLOWING TESTICULAR X-IRRADIATION

1976 ◽  
Vol 83 (1) ◽  
pp. 190-200 ◽  
Author(s):  
H. L. Verjans ◽  
K. B. Eik-Nes
Keyword(s):  
Interstitial Cell ◽  
Serum Testosterone ◽  
Male Rats ◽  
Ventral Prostate ◽  
Testis Weight ◽  
X Ray ◽  
Serum Lh ◽  
Testicular Weight ◽  
Unknown Factor ◽  
X Irradiation

ABSTRACT Testes of adult, male rats were exposed to a total dose of 1500 R of X-irradiation. Testicular weight decreased from day 8 after X-ray treatment. This decrease was, however, preceded by an increment of the testis weight on day 4 following treatment. X-ray treatment of testes was associated with significant increases in serum FSH. Testicular irradiation had, however, no effect on ventral prostate and seminal vesicles weights. Serum testosterone increased only on day 1, 2 and 4 after irradiation, while serum LH levels tended to increase from day 8 post-irradiation. These changes were not significant, however, when compared with non-irradiated controls. At 7, 13 and 20 days following 1500 R of bilateral, testicular X-irradiation, the hypothalamic-pituitary unit was still capable of responding to exogenous gonadotrophin releasing factor. Serum FSH may in male rats be regulated at least partly by circulating steroids of testicular origin and partly by an unknown factor of non-interstitial cell nature.

MODIFICATION OF MALE RAT REPRODUCTIVE TRACT DEVELOPMENT BY A SINGLE INJECTION OF TESTOSTERONE PROPIONATE SHORTLY AFTER BIRTH

1965 ◽  
Vol 50 (2) ◽  
pp. 310-316 ◽  
Author(s):  
H. E. Swanson ◽  
J. J. van der Werff ten Bosch
Keyword(s):  
Reproductive Tract ◽  
Testosterone Propionate ◽  
Pubertal Development ◽  
Testicular Tissue ◽  
Male Rats ◽  
Ventral Prostate ◽  
Male Rat ◽  
Androgenic Activity ◽  
Reduced Rate ◽  
And Control

ABSTRACT Administration of 500 μg testosterone propionate (TP) to male rats within a few days of birth was followed by a reduced rate of growth of the testes and, after initial stimulation, of the seminal vesicles and ventral prostate. While the testes and accessory organs remained permanently smaller in TP-treated rats than in controls, their growth rates showed pubertal accelerations which coincided with those in the controls. On the basis of these criteria, as well as the criterion of spermatogenesis, the time of puberty was not altered by early TP-administration. The weights of the accessory organs considered in relation to the weights of the testes were identical in TP-treated and control rats; testis tubule diameters in TP-treated rats were normal for the age. It is concluded that early TP-administration caused a reduction in the volume of testicular tissue, which involved both tubules and Leydig cells. There were no indications that TP had caused any qualitative changes in the testes: the timing and the pattern of pubertal development (spermatogenesis and androgenic activity) appeared to be normal.

ICI 176,334: A NOVEL NON–STEROIDAL, PERIPHERALLY SELECTIVE ANTIANDROGEN

1987 ◽  
Vol 113 (3) ◽  
pp. R7-R9 ◽  
Author(s):  
B.J.A. Furr ◽  
B. Valcaccia ◽  
B. Curry ◽  
J.R. Woodburn ◽  
G. Chesterson ◽  
...  
Keyword(s):  
Testosterone Propionate ◽  
Prostate Gland ◽  
Ventral Prostate ◽  
Adult Rats ◽  
Androgen Action ◽  
Serum Lh ◽  
Accessory Sex Organs ◽  
Hypothalamic Pituitary Axis ◽  
Rat Prostate ◽  
Higher Doses

ABSTRACT Pure antiandrogens, like flutamide, antagonize androgen action both peripherally and centrally at the hypothalamic–pituitary axis, which leads to an increase in LH and testosterone secretion. A new non–steroidal antiandrogen ICI 176,334 ((2RS)4′-cyano-3-(4-fluorophenylsulphonyl)-2-hydroxy-2-methyl-3′-trifluoromethyl)propion-anilide) has now been discovered which causes regression of the accessory sex organs but does not increase serum concentrations of LH and androgens. ICI 176,334 binds to rat prostate androgen receptors with an affinity around fourfold that of hydroxyflutamide. When administered s.c. concurrently with testosterone propionate (200μg/kg) for 7 days to immature castrated rats, ICI 176,334 (10mg/kg) significantly (P<0.001) inhibited growth of the seminal vesicles and ventral prostate gland. Oral administration of ICI 176,334 at doses of 1, 5 and 25mg/kg for 14 days to adult rats caused a dose–related reduction in accessory sex organ weights but had no effect on the testes. None of these doses caused a significant increase in serum LH and testosterone. Flutamide was around fourfold less potent and significantly increased serum LH and testosterone at the higher doses. ICI 176,334 was well tolerated. ICI 176,334 should, therefore, prove useful for the treatment of androgen–responsive benign and malignant diseases.

scholarly journals Influence of dietary soy isoflavones on immature hamster uterotrophic and Hershberger assays

2013 ◽  
Vol 57 (4) ◽  
pp. 579-585 ◽  
Author(s):  
Maria Minta ◽  
Lidia Radko ◽  
Sylwia Stypuła-Trębas ◽  
Barbara Woźniak ◽  
Jan Żmudzki
Keyword(s):  
Enhanced Green Fluorescent Protein ◽  
Fluorescent Protein ◽  
Testosterone Propionate ◽  
Levator Ani ◽  
Ventral Prostate ◽  
Protein Assay ◽  
Green Fluorescent ◽  
High Degree ◽  
The Impact

Abstract To select appropriate diet for hamsters used in the uterotrophic and Hershberger assays two rodent diets were compared: Murigran (Agropol, Poland) and Altromin 7010 (Altromin Spezialfutter GmbH&Co., Germany). The contents of bioactive compounds in feeds were evaluated by liquid chromatography, and their oestrogenic activity by yeast enhanced green fluorescent protein assay. In opposition to Altromin, Murigran contained high amounts (μg/kg) of genistein (765 600) and daidzein (132 000), and the oestrogenic activity of these compounds, expressed as 17β-oestradiol equivalent concentration (EEQ), was found to be 9.54 μg EEQ/kg. In in vivo study, Murigran induced a high degree of oestrogenisation in immature hamsters, and females failed to exhibit a normal uterine response to recommended dose of a model oestrogen agonist 17α-ethinyloestradiol. There was no influence of the diet on the weight of five accessory sex organs (ASO): ventral prostate, seminal vesicles with coagulating glands, levator ani bulbocavernosus muscles, Cowper`s glands, and glans penis of control males. However, the impact on ASO response to model androgen agonist, testosterone propionate was observed. The obtained results provide the evidence that phytooestrogen-rich feed modulates the oestrogenic and androgenic response to chemicals.

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