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Moleculer Mechanism of (functional) genomic imprinting in humans.

Research Project

Project/Area Number 08457630
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Human genetics
Research InstitutionNagasaki University

Principal Investigator

JINNO Yoshihiro  Nagasaki University, School of Medicine, Associate Professor., 医学部, 助教授 (20179097)

Co-Investigator(Kenkyū-buntansha) ISHIMARU Tadayuki  Nagasaki University, School of Medicine, Professor., 医学部, 教授 (20039580)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1997: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 1996: ¥3,300,000 (Direct Cost: ¥3,300,000)
Keywordsgenomic imprinting / H19 gene / cis-acting factor / repetitive sequence / PEN11B gene / atypical imprinted gene / 非定形的刷り込み遺伝子 / インプンリティング
Research Abstract

Molecular analeses of a novel gene which was isolated in the first year were a main subject in the current year.
(1) Identification of cis-acting factors
i) A repetitive sequence consisting of tandem repeats of pentanucleotides, which showed homology to the H19 downstream pentamer repeats, was found at 3.2 kb upstream of the first exon in the novel gene. Pentanucleotode of CCCAG was reiterated 30 times and CTCAG 9 times in the repetitious 375 bp sequence. It was more degenerate compared to the 280 bp H19 repeat in which pentanucleotides of CCCAG and CCCTG were repeated 24 times and 20 times, respectively.
ii) A BstUI/HhaI RFLP was identified in the 3' UTR.Allele-specificity in expression of this gene was analyzed by taking advantage of this RFLP.
iii) While it was equally expressed from both alleles in the brain, liver and kidney, two-fold allelic difference in expression was found in the placenta. Parental origin of preferrentially expressed allele could be ascertained in 5 cases among nine examined, and it was consistently maternal. Thus, we considered it to indicate an atypical imprinted gene.
iv) So far, differential methylation has not yet identified in the 5' upstream region and second intron in which another kind of repetitive sequence was present.
v) We collected 7 triplets placentae and 2 quadruplets placentae in order to identify sequences responsible for polymorphic imprinting. But, preliminary experiments suggested insuitability of using placentae for this pourpose, and therefore we abandoned this subproject.
(2) Isolation and identification of trans-acting factors
Being late in starting this subproject because of unexpectedly taking time in the above work, we are now trying to find the best condition of subtractive PCR.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Toshinobu Miyamoto et al.: "A SacII polymorphism in thehuman ASCL2(HASH2)gene region" J Hum Genet. 43 in (press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kankatsu Yun et al.: "Promoter-specific insulin- like growth factor 2 gene imprinting in human fetal liver and hepatoblastoma" J Pathol. 183 (in press). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kohzoh Mitsuya et al.: "Paternal expression of WT1 in human fibroblasts and lymphocytes" Hum Mol Genet. 6・13. 2243-2246 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kankatsu Yun et al.: "Monoallelic expression of the insulin-like growth factor-2 gene in ovarian cancer" Am J Pathol. 148・4. 1081-1087 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yuichiro Ikeda et al.: "A partial hydatidiform mole with 2N/3N mosaicism identified by molecular analysis" J Assist Reprod Genet. 13・9. 739-744 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Miyamoto T., Jinno Y., Miura K., Sengoku K., Soejima H., Yun K., Yaginuma Y., Niikawa N., and Ishikawa M.: "A Sac II polymorphism in the human ASC L2 (HASH2) gene region." J Hum.Genet.43. 69-70 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yun K., Jinno Y., Sohda T., Niikawa N., and Ikeda T.: "Promoter-specific insulin-like growth factor 2 gene imprinting in human fetal liver and hepatoblastoma." J.Patol. 183 : (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Kohzoh M., Sui H., Meguro M., Kugoh H., Jinno Y., Niikawa N., and Oshimura M.: "Paternal expression of WT1 in human fibroblasts and lymphocytes." Hum.Mol.Genet.13. 2243-2246 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yun K., Fukumoto M., and Jinno Y.: "Monoallelic expression of the insulin-like growth factor-2 gene in ovarian cancer." Am.J.Pathol.148. 1081-1087 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yuichiro Ikeda et al.: "A partial hydatidiform mole with 2N/3N mosaicism identified by molecular analysis." J Assist Reprod Genet.13・9. 739-744 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toshinobu Miyamoto et al.: "A SacII polymorphism in the human ASCL2(HASH2)gene region" J Hum Genet. 43(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kankatsu Yun et al.: "Promoter-specific insulin-like growth factor 2 gene imprinting in human fetal liver and hepatoblastoma" J Pathol. 183(in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kohzoh Mitsuya et al.: "Paternal expression of WT1 in human fibroblasts and lymphocytes" Hum Mol Genet. 6・13. 2243-2246 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yoshihiro Jinno: "Mouse/human sequence divergence in a region with a paternal-specific methylationimprint a tthe human H19 locus" Human Molecular Genetics. 5(8). 1155-1161 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Satoko Miyatake: "Two polymorphic AvaI and HhaI sites in a differentially methylated region of the human H19 gene" Japanese Journal of Human Genetics. 41. 253-255 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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