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Functional Analysis of Placenta-Specific Transcription Factor during Placental Development

Research Project

Project/Area Number 12671637
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Obstetrics and gynecology
Research InstitutionFujita Health University

Principal Investigator

OGAWA Hisamitsu  School of Medicine, Fujita Health University, Professor, 医学部, 教授 (80101658)

Co-Investigator(Kenkyū-buntansha) YAMADA Kazuyo  Institute for Comprehensive Medical Science, Fujita Health University, Lecturer, 総合医科学研究所, 講師 (90080217)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2000: ¥2,000,000 (Direct Cost: ¥2,000,000)
KeywordsGCM protein / Placenta / Transcription factor / Human genome / hGCMa / 1 / 遺伝子構造
Research Abstract

We isolated a 2.8 kb cDNA clone encoding a 436-amino acid protein that dictates tissue-specific expression of human aromatase from a human placenta! cDNA library using a yeast one-hybrid system with a trophoblast-specific element 2 as a reporter sequence. The protein was revealed to be identical to hGCMa, a mammalian homologue of the Drosophila GCM (glia cells missing). Drosophila GCM is a neural transcription factor that regulates glial cell fate.
Expression of hGCMa is restricted to the placenta in human. The protein expressed in Sf 21 cells also binds to PLE1 in the leptin promoter among other cis-elements reported to confer placenta-specific expression, suggesting that hGCMa is a placenta-specific transcription regulator, possibly involved in the expression of multiple placenta-specific genes (Yamada K., Ogawa H., et al. 1999 J. Biol. Chem. 274: 32279-32286).
We also determined the genomic organization, chromosomal localization, and the complete 22 kb DNA sequence of hGCMa gene. It contains six exons and five introns, encoding a 2.8 kb cDNA. Overall genomic organization is similar for the human and mouse. Several potential binding sites for transcription factors like GATA, Oct-1, and βHLH proteins were found in the 5'-flanking region of the human gene. A DNA motif for GCM protein binding exists in the 5'-flanking region that is highly homologous with that of the mouse gene. The location of this gene was mapped to chromosome 6 using fluorescence in situ hybridization (Yamada K., Ogawa H., et al. 2000 Biochem. Biophys. Res. Commun. 278: 134-139).
We prepared anti-hGCMa antibody in rabbits. In preliminary experiments, it reacted with also several human blood cells besides the placenta. Now we are going to prepare more specific antibody against hGCMa.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] Yamada, K. et al.: "A GCM motif protein is impolitic in placenta-specific expression of human aromatase gene"J.Biol.Chem.. 274(45). 32279-32286 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamada, K. et al.: "Genomic organization, chromosomal localization, and the complete 22kb DNA Sequence of the human GCMa/GCM1, a placenta-specific transcription factor gene"Biochem.Biophys.Res.Commun.. 278(1). 134-139 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamada K., Ogawa H., Honda, S., Harada, N., and Okazaki T.: "A GCM motif protein is involved in placenta-specific expression of human aromatase gene."J. Biol. Chem.. 274 (45). 32279 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamada K., Ogawa H., Tamiya G., Ikeno M., Morita M., Asakawa S., Shimizu N., and Okazaki T.: "Genomic organization, chromosomal localization, and the complete 22 kb DNA sequence of the human GCMa/GCMl , a placenta-specific transcription factor gene."Biochem. Biophys. Res. Commun.. 278 (1). 134 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yamda,K.,Ogawa,H., et al.: "Genomic organization, chromosomal localization and the complete 22kb sequence of the human GCMa/1, a placeuta specific transcription foctor gene."Biochem.Biophys.Res.Commun.. 278(1). 134-139 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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