GSBS Student Publications

Title

Rat estrogen receptor-alpha and -beta, and progesterone receptor mRNA expression in various prostatic lobes and microdissected normal and dysplastic epithelial tissues of the Noble rats

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Pathology; Department of Surgery, Division of Urology

Date

1-8-1998

Document Type

Article

Medical Subject Headings

Animals; Dissection; Estradiol; Gene Expression Regulation; Male; Prostate; RNA, Messenger; Rats; Receptors, Estrogen; Receptors, Progesterone; Testosterone

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Semiquantitative RT-PCR was used to determine if transcripts of the two estrogen receptor (ER) subtypes, ER alpha and ER beta, and the progesterone receptor (PR) are differentially expressed and/or regulated in the various normal lobes of the Noble (NBL) rat prostate. We found that ER beta mRNA was present at comparable, high levels in all three major prostatic lobes: dorsal (DP), lateral (LP) and ventral (VP) prostate. ER alpha mRNA was, however, expressed at low levels among the various lobes in the following descending order of abundance: LP>DP>VP. Expression of PR transcript was low and paralleled the expression pattern of ER alpha mRNA. Treatments of rats with testosterone (T) plus estradiol-17beta (E2) (T+E2) or T alone induced no discernible alterations in ER alpha, ER beta, and PR mRNA levels in the VP, DP and LP, while those with E2 caused a general decline in the expression of all three transcripts. We then studied the expression of the three receptors in the normal and dysplastic epithelium of the dorsolateral prostates (DLPs) of rats treated with T+E2. Comparable levels of ER beta mRNA were found in microdissected dysplastic and normal epithelia. In contrast, significantly higher levels of PR mRNA were present in epithelial samples from dysplastic acini. ER alpha mRNA was not detected in any of the microdissected epithelial samples. Results from this study suggest that upregulation of PR mRNA expression, likely mediated via ER beta action, is involved in the genesis of T+E2-induced dysplasia in this animal model.

Rights and Permissions

Citation: Endocrinology. 1998 Jan;139(1):424-7.

Related Resources

Link to article in PubMed

Journal Title

Endocrinology

PubMed ID

9421443