Effects of Luteinizing Hormone and Androgen on the Development of Rat Progenitor Leydig Cells in Vitro and in Vivo

Overview

Journal Asian J Androl

Specialty Urology

Date 2013 Jun 25

PMID 23792342

Citations 6

Authors

Jing-Jing Guo

Xue Ma

Claire Q F Wang

Yu-Fei Ge

Qing-Quan Lian

Dianne O Hardy

Yu-Fei Zhang

Qiang Dong

Yun-Fei Xu

Ren-Shan Ge

Affiliations

Soon will be listed here.

Abstract

Progenitor Leydig cells are derived from stem cells. The proliferation and differentiation of progenitor Leydig cells significantly contributes to Leydig cell number during puberty. However, the regulation of these processes remains unclear. The objective of the present study was to determine whether luteinizing hormone (LH) or androgen contributes to the proliferation and differentiation of progenitor Leydig cells. Fourteen-day-old male Sprague-Dawley rats were treated for 7 days with NalGlu, which is a gonadotropin-releasing hormone antagonist, to reduce the secretion of LH in the pituitary and thus, androgen in the testis. Rats were co-administered with LH or 7α-methyl-nortestosterone (MENT), which is an androgen resistant to metabolism by 5α-reductase 1 in progenitor Leydig cells, and the subsequent effects of LH or androgen were measured. (3)H-Thymidine was also intravenously injected into rats to study thymidine incorporation in progenitor Leydig cells. Progenitor Leydig cells were examined. NalGlu administration reduced progenitor Leydig cell proliferation by 83%. In addition, LH or MENT treatment restored Leydig cell proliferative capacity to 73% or 50% of control, respectively. The messenger RNA levels of proliferation-related genes were measured using real-time PCR. The expression levels of Igf1, Lifr, Pdgfra, Bcl2, Ccnd3 and Pcna were upregulated by MENT, and those of Pdgfra, Ccnd3 and Pcna were upregulated by LH. Both LH and MENT stimulated the differentiation of progenitor Leydig cells in vitro. We concluded that both LH and MENT were involved in regulating the development of progenitor Leydig cells.

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