• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2002 Fiscal Year Final Research Report Summary

Analysis of transcriptional regulation of the human ABO genes during differentiation of erythroid lineage

Research Project

Project/Area Number 13670418
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Legal medicine
Research InstitutionTOYAMA MEDICAL AND PHARMACEUTICAL UNIVERSITY

Principal Investigator

KOMINATO Yoshihiko  Toyama Medeical and Pharmaceutical University, Faculty of Medicine, Assistant Professor, 医学部, 講師 (30205512)

Co-Investigator(Kenkyū-buntansha) HATA Yukiko  Toyama Medeical and Pharmaceutical University, Faculty of Medicine, Assistant, 医学部, 教務職員(研究職) (30311674)
Project Period (FY) 2001 – 2002
Keywordsthe human ABO blood group genes / transcription / promoter assay / alternative promoter usage / DNA methylation / LINE / ABO antigens / Alu
Research Abstract

We have studied the expression of the human histo-blood group ABO genes during erythroid differentiation using the ex vivo culture of AC133^-CD34^+ cells obtained from peripheral blood. The AC133^-CD34^+ cells are rich in erythroid-committed progenitors, and more than 90 % of the colonies produced from those cells are pure erythroid colonies. The AC133^-CD34^+ cells were primarily cultured in serum-free medium supplemented with TPO, FL and SCF for 7 days, followed by the secondary culture with the addition of EPO for the next 7 days. The ABO genes were expressed in the cells at day 7. The 5'-RACE analysis of RNA from those cells has revealed a novel transcription start site, which appeared to mark an alternative starting exon (1a) comprising 27 base pairs at the 5' end of a CpG island which contains a constitutive promoter of exon 1 in the ABO genes. The results from the RT-PCR specific to exon 1a indicated that the cells of both erythroid and epithelial lineages utilize this exon as the transcription starting exon. The transient transfection experiments showed that the region just upstream of the transcription start site possesses the promoter activity in a cell type-specific manner, when placed 5' adjacent to the reporter luciferase gene. The results from bisulfite genomic sequencing and RT-PCR analysis indicated that hypermethylation of the distal promoter region correlated with the absence of the transcripts containing exon 1a, whereas hypermethylation in the interspersed repeats 5' adjacent to the distal promoter was commonly observed in all the cell lines examined. These results suggest that a functional alternative cell-type specific promoter is located between the hypermethylated region of repetitive elements such as Alu and LINE and the CpG island containing a constitutive promoter of exon 1 in the ABO genes.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Yamamoto M., Kominato Y., Hata Y., et al.: "Murine equivalent of the human histo-blood group ABO genes is a cis-AB gene and encodes a glycosyltransferase with A and B transferase activity"Journal of Biological Chemistry. 276. 13701-13708 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Kominato Y., Hata Y., et al.: "Alternative promoter identified between a hypermethylated upstream region of repetitive elements and a CpG island in human histo-blood group ABO genes"The Journal of Biological Chemistry. 277. 37936-37948 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hata Y., Kominato Y., et al.: "Characterization of the human ABO gene promoter in erythroid cell lineage"Vox Sanguinis. 82. 39-46 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hata Y., Kominato Y., Takizawa H., et al.: "Transcription starting from an alternative promoter leads to the expression of the human ABO histo-blood group antigen"Transfusion. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yamamoto M., Lin X-H., Kominato Y., Hata Y., Noda R., Saitou N., Yamamoto F.: "Murine Equivalent of the human histo-blood group ABO genes is a cis-AB gene and encodes a glycosyltransferase with A and B transferase activity."Journal of Biological Chemistry. 276. 13701-13708 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kominato Y., Hata Y., Takizawa H., Matsumoto K., Yasui, K., Tsukada J. and Yamamoto F.: "Alternative promoter identified between a hypermethylated upstream region of repetitive elements and a CpG island in human histo-blood group ABO genes."Journal of Biological Chemistry. 277. 37936-37948 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hata Y., Kominato Y., and Takizawa H.: "Characterization of the human ABO gene promoter in erythroid cell lineage."Vox Sanguinis. 82. 39-46 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Hata Y., Kominato Y., Takizawa H., et al.: "Transcription starting from an alternative promoter leads to the expression of the human ABO histo-blood group antigen (in press)."Transfusion. in press

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2004-04-14  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi