Tissue-specific, hormonal, and developmental regulation of SCC-LacZ expression in transgenic mice leads to adrenocortical zone characterization

Meng Chun Hu, Shen Ju Chou, Yu Yao Huang, Nai Chi Hsu, Hung Li, Bon Chu Chung

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49 Citations (Scopus)


We report here the study of the human CYP11A1 promoter in driving tissue-specific, developmentally and hormonally regulated reporter gene expression. A 4.4-kb fragment containing all known regulatory elements is more efficient than a short basal promoter fused to an upstream adrenal enhancer in driving reporter LacZ gene expression both in cell culture and in transgenic mice. The LacZ gene controlled by the 4.4- and 2.3-kb promoters was expressed in the adrenal cortex, testicular Leydig cells, ovarian corpora lutea, and granulosa cells. Transgene expression in the adrenals was stimulated by ACTH, indicating the presence of ACTH-responsive sequence. β-Galactosidase activity was first detected in the adrenal primordia at 11.5 days postcoitum. Its expression continued throughout all stages of adrenal development in a pattern similar to that of the endogenous CYP11A1, which was expressed in all zones of the adrenal cortex, but was strongest in the X zone. The X zone grew before puberty but regressed afterward, as did the levels of CYP11A1 and LacZ gene expression in the X zone. Our study of the CYP11A1 promoter in transgenic mice led to characterization of the adrenocortical zones.

Original languageEnglish
Pages (from-to)5609-5618
Number of pages10
Issue number12
Publication statusPublished - Jan 1 1999


All Science Journal Classification (ASJC) codes

  • Endocrinology

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