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Sperm factor caused a transient increase in intracellular calcium concentration of sea urchin eggs.

Research Project

Project/Area Number 05640764
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 動物生理・代謝
Research InstitutionToyama University

Principal Investigator

KURODA Hideyo  Toyama University, Faculty of Science Professor, 理学部, 教授 (50064845)

Co-Investigator(Kenkyū-buntansha) KIKUCH Tohru  Toyama Med.& Pharmaceu.Univ.Professor, 和漢薬研究所, 教授 (40025680)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
Keywordssea urchin / egg / calcium ion / sperm / inositol 1,4,5-trisphosphate / cGMP / Inositol 1,4,5-Trisphosphate / cGMP
Research Abstract

RESEACH PLAN
We have shown that the application of soluble sperm extract elicits a Ca^<2+>-transient in fertilized, denuded eggs of sea urchin. In this project, we will try to purify this sperm factor and to elucidate how the factor causes the transient.
RESULTS
A sperm factor was partially purified using column chromatography of cation exchanger-anion exchanger-amido 80. The activity was stable in acid, alkali and protease. But we could not succeed further purification. The activity did not probably depend on a single factor.
The Ca^<2+>-transient by sperm extract was inhibited by heparine or GDP-betaS unlike one during fertilization. Furthermore, sperm extract caused a transient increase in IP_3 mass but not in cGMP mass. These results show that sperm extract caused IICR in fertilized eggs but not stimulate CICR.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] M.Osawa: "Sperm and its soluble extract cause transient incr eases in intracellular calcium concertration and inmembr ane pot ential of sea ur chinzygotes." Dev.Biol.166. 268-276 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa: "Solude sperm extrace trrigers inositol-1,4,5-trisphosphate induced Ca^<2+> release in the oocyter of the seaurchin,Anthocidar is cr assispina" Cell Struct.Funct.19. 73-80 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa: "Sudies on the mecharism for Ca-transient in sea ur chin zygotes caused by refertilization and ezternal application of sper mextrace." Exptl.Cell Res. (投稿中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa, K.Takemoto, M.Kikuyama, H.Uchiyama, Y.Hiramoto and H.Kuroda: "Sperm and its soluble extract c ause transient increases in intracellu lar calcium concentration and in membrane potential of sea urchin zygotes" Dev.Biol.166. 268-276 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa: "Soluble sperm extract trrigers inositol 1,4,5-trisphosphate-induced Ca^<2+> release in the oocyter of the sea urchin, Anthocidaris crassispina" Cell Struct.Funct.19. 73-80 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa, N.Kaneko, A.Terakawa, T.Kitani, R.Kuroda and H.Kuroda: "Studies on the mechanism for Ca_i-transient in sea urchin zygotes caused by refertilization and external application of sperm extract" Exptl.Cell Res.(submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] M.Osawa: "Soluble sperm extract triggers inositol 1,4,5-Trisphosphate-induced Ca^<2+> release in the oocytes of the sea urchin,Anthocidaris crassispina" Cell Struct.Funct.19. 73-80 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] M.Osawa: "Sperm and its soluble extract cause Transient increases in intacellular calcium concentration and in membrane potential of sea urchin zygotes" Dev.Biol.166. 268-276 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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