NDLI: Effect of chronic oestrogen administration on androgen receptor expression in reproductive organs and pituitary of adult male rat.

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Effect of chronic oestrogen administration on androgen receptor expression in reproductive organs and pituitary of adult male rat.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Kaushik, M. C. Misro, M. M. Sehgal, N. Nandan, D.
Description	Country affiliation: India Author Affiliation: Kaushik MC ( Department of Reproductive Biomedicine, National Institute of Health and Family Welfare, Munirka, New Delhi, India.)
Abstract	Following chronic (15 or 30 days) treatment with oestradiol 3-benzoate (75 microg rat(-1) day(-1) in 100 microl of olive oil) to adult rats, androgen receptor (AR) expression was analysed simultaneously in testis, epididymis, seminal vesicle, prostate and pituitary utilising three independent tools i.e. immunohistochemistry, Western blotting and RT-PCR. All the five organs showed higher AR transcriptional activity gradually increasing from 15 to 30 days of oestrogen treatment. However, the AR protein expression either through immunostaining or Western blotting demonstrated a significant decline in all the reproductive organs. In the pituitary, on the other hand, the decline coincided with a distinct breakdown of the AR protein into two bands with increasing duration of treatment. Serum and intra-testicular testosterone levels were found significantly lowered. Spermatogenesis was adversely affected with concurrent decrease in weights of testis and accessory sex organs. Decrease in testis weight was consistent with the reduction in the number of maturing germ cells per tubule. Despite the decrease in weight, accessory sex organs like epididymis, seminal vesicle and prostate were completely devoid of any apoptotic cells which were characterised only in testis and pituitary. Seminiferous epithelium demonstrated a marked increase in the number of germ cells undergoing apoptosis. However, the rate of cell apoptosis was much higher in the pituitary than in the testis at the end of 30 days treatment. It is therefore concluded that degradation of AR protein expression after oestrogen treatment is probably directly linked to an increase in cell apoptosis both in testis and pituitary.
File Format	HTM / HTML
ISSN	03034569
Issue Number	3
Volume Number	42
e-ISSN	14390272
Journal	Andrologia
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2010-06-01
Publisher Place	Germany
Access Restriction	Subscribed
Subject Keyword	Discipline Urology Discipline Reproductive Medicine Contraceptive Agents Pharmacology Estradiol Analogs & Derivatives Genitalia, Male Drug Effects Pituitary Gland Receptors, Androgen Metabolism Animals Blotting, Western Immunohistochemistry Male Rats Rats, Sprague-dawley Reverse Transcriptase Polymerase Chain Reaction Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Urology Endocrinology

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