Function and distribution of a steroidogenic cell-specific transcription factor, Ad4BP

Ken-Ichirou Morohashi, O. Hatano, Masatoshi Nomura, K. Takayama, M. Hara, H. Yoshii, A. Takakusu, T. Omura

Research output: Contribution to journalArticle

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Abstract

Ad4BP was identified as an essential transcription factor regulating steroidogenic cell-specific and cAMP-dependent transcription of the genes of steroidogenic P450s. The Ad4BP transcript was detected in steroidogenic tissues such as adrenal gland, testis, ovary, placenta and brain by RT-PCR, and showed good correlation with the expression of steroidogenic P450s. The genes of steroidogenic P450s, which are transcribed only in steroidogenic cells, were transcribed in non-steroidogenic cells when an Ad4BP expression vector was introduced into the cells. To study the function of Ad4BP in the differentiation of the steroidogenic tissues, immunochemical and immunohistochemical studies were performed with the tissues prepared from various developmental stages of rats. Adrenal cortex expressed Ad4BP since the tissue was detected in the dorsal wall of the fetus. Gonadal tissues expressed Ad4BP in a sex-dependent manner. High levels of Ad4BP expression were detected in fetal and prepubertal testes and in prepubertal and adult ovaries, whereas low level expressions were observed in the adult testes and in the fetal ovaries. The expression of Ad4BP in the gonads correlates well with the expression of the Müllerian inhibiting substance gene as well as the steroidogenic P450 gene for both sexes. These observations indicate that Ad4BP plays an important role in the development and differentiation of the steroidogenic tissues including sexual differentiation of the gonadal tissues through activation of the transcription of its target genes.

Original languageEnglish
Pages (from-to)81-88
Number of pages8
JournalJournal of Steroid Biochemistry and Molecular Biology
Volume53
Issue number1-6
DOIs
Publication statusPublished - Jan 1 1995

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Transcription Factors
Tissue
Genes
Testis
Ovary
Transcription
Sex Differentiation
Adrenal Cortex
Gonads
Adrenal Glands
Placenta
Transcriptional Activation
Rats
Brain
Fetus
Chemical activation
Polymerase Chain Reaction

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Cell Biology
  • Clinical Biochemistry
  • Endocrinology
  • Molecular Biology
  • Molecular Medicine
  • Endocrinology, Diabetes and Metabolism

Cite this

Function and distribution of a steroidogenic cell-specific transcription factor, Ad4BP. / Morohashi, Ken-Ichirou; Hatano, O.; Nomura, Masatoshi; Takayama, K.; Hara, M.; Yoshii, H.; Takakusu, A.; Omura, T.

In: Journal of Steroid Biochemistry and Molecular Biology, Vol. 53, No. 1-6, 01.01.1995, p. 81-88.

Research output: Contribution to journalArticle

Morohashi, Ken-Ichirou ; Hatano, O. ; Nomura, Masatoshi ; Takayama, K. ; Hara, M. ; Yoshii, H. ; Takakusu, A. ; Omura, T. / Function and distribution of a steroidogenic cell-specific transcription factor, Ad4BP. In: Journal of Steroid Biochemistry and Molecular Biology. 1995 ; Vol. 53, No. 1-6. pp. 81-88.
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