Identification of a novel population of adrenal-like cells in the mammalian testis

被引:76
作者
Val, Pierre [1 ]
Jeays-Ward, Katherine [1 ]
Swain, Amanda [1 ]
机构
[1] Inst Canc Res, Sect Gene Funct & Regulat, London SW3 6JB, England
基金
英国医学研究理事会;
关键词
gonad development; adrenal development; adrenal rests; steroidogenesis; cell migration; INDUCED ADRENOCORTICAL-NEOPLASIA; DEVELOPING GONAD; DAX1; EXPRESSION; LEYDIG-CELLS; ADULT MALES; REST TUMORS; HYPERPLASIA; MOUSE; MICE; DEFICIENCY;
D O I
10.1016/j.ydbio.2006.07.030
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Steroidogenic cells of the adrenal and gonad are thought to be derived from a common primordium that divides into separate tissues during embryogenesis. In this paper, we show that cells with mixed adrenal and Leydig cell properties are found dispersed in the insterstitium of the embryonic and adult mouse testis. They express the adrenal markers Cyb11b1 and Cyp21 and respond to ACTH. Consistent with these properties, we show that the embryonic testis produces the adrenal steroid corticosterone. These cells also express Cyp17 and respond to hCG stimulation but do not express the Leydig specific marker InsI3 showing that they are a population of steroidogenic cells distinct from Leydig cells. Based on their properties, we refer to these cells as adrenal-like cells of the testis and propose that they are the mouse equivalent of the precursors of human adrenal rests, tumors found primarily in male patients with congenital adrenal hyperplasia. Organ culture studies show that ACTH-responsive cells are present at the gonad/mesonephros border and seem to migrate into the XY but not the XX gonad during development. Consistent with this, using transgenic Cyp11a1 reporter mice, we definitively show that steroidogenic cells can migrate from the mesonephros into the XY gonad. We also show that the region between the mesonephros and the gonad harbors steroidogenic cell precursors that are repressed by the presence of the mesonephros. We propose that this region is the source of the adrenal-like cells that migrate into the testis as it develops and are activated when Leydig cells differentiate. These studies reveal the complex nature of steroidogenic cell differentiation during urogenital development. (c) 2006 Elsevier Inc. All rights reserved.
引用
收藏
页码:250 / 256
页数:7
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