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Study of oviductal spontaneous contraction in relation to reciprocal controlling mechanism between fallopian tube and gamete or embryo.

Research Project

Project/Area Number 03670791
Research Category

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

Allocation TypeSingle-year Grants
Research Field Obstetrics and gynecology
Research InstitutionKyusyu University

Principal Investigator

NOZAKI Masahiro  Kyusyu University, Obstetrics & Gynecology, research associate, 医学部, 助手 (60228319)

Co-Investigator(Kenkyū-buntansha) SAITO Toshiaki  Kyusyu University, Obstetrics & Gynecology, assistant professor, 医学部, 講師 (80162212)
SANO Masatoshi  Kyusyu University, Obstetrics & Gynecology, assistant professor, 医学部, 講師 (60206000)
中村 元一  九州大学, 医学部, 講師 (90128059)
Project Period (FY) 1991 – 1993
Project Status Completed (Fiscal Year 1993)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1993: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1992: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1991: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsPhospholipase A_2 activity / Rabbit oviducts / Epithelial cells / Estrogens / Progesterone / プロゲステロン / 家兎卵管 / ホスホリパ-ゼA_2活性
Research Abstract

Phospholipase A_2 (EC 3.1.1.4) activity of the epithelium from rabbit oviducts was compared in the existence of various, ovarian steroids to assess how they could modulate prostaglandins (PG_S) biosynthesis in the oviduct. At least four kinds of phospholipass A_2 (PLA_2) activities with respect to calcium dependency and pH requirement were observed. These were two calcium-depredent, pH optima of 7.5 and 8.5 activities, and two calcium-independent, pH optima of 4.0 and 8.0 activities. One of those activities, a calcium-dependent and alkaline active PLA_2 activity of the epithelial cells was then compared between the ampullary portion and the isthmic portion of the oviducts. The activity was significantly higher in the ampullary epithelium the in the isthmic epithelium (223.2 (〕SY.+-.〔) 57.2 ir 103.8 (〕SY.+-.〔) 32.3 pmol/min/mg. p<0.05). Therefore PLA_2 activity of the ampullary epithelium from rabbit oviducts was compared in the existence of various ovarian steroids. The PLA_2 activity of the cells from ovariectomized rabbits (control) was 190.8 (〕SY.+-.〔) 9.8 pmol/min/mg. The PLA_2 activity of the cells from progesterone-treated rabbits was 156.0 (〕SY.+-.〔) 41.8 pmol/min/mg and was not significant compared to the control activity. However, the PLA_2 activity of the cells from the estrogen-treated rabbits was 233.5 (〕SY.+-.〔) 29.0 pmol/min/mg. which was significantly higher than the control activity (p<0.05). On the other hand, the PLA_2 activity of the cells from progesterone-treated rabbits after being primed with estrogen was 116.3 (〕SY.+-.〔) 25.9 pmol/min/mg. which was significantly lower than the control activity (p<0.01). These results suggest that the changes in PLA_2 activity by ovarian steroids could regulate the local production of PG_S which plays a role in both smooth muscle contractility and celiray activity.

Report

(4 results)
  • 1993 Annual Research Report   Final Research Report Summary
  • 1992 Annual Research Report
  • 1991 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] T.Morishita: "Regional differences of phospholipase A_2 activity in the rabbit oviductal epithelium." Prostaglandins Leukotrienes and Essential Fatty Acids. 47. 199-202 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Morishita: "Changes in phospholipase A_2 activity of the rabbit ampullary epithelium by ovarian steroids." Prostaglandins Leukotrienes and Essential Fatty Acids. 48. 315-318 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Morishita: "Regional differences of phospholipase A_2 activity in the rabbit oviductal epithelium." Prostaglandins Leukotrienes and Essendial Fatty Acids. 47. 199-202 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Morishita: "Change in phospholipase A_2 activity of the rabbit ampullary epithelim by ovarian steroids." Prostaglandins Leukotrienes and Essendial Fatty Acids. 48. 315-318 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1993 Final Research Report Summary
  • [Publications] T.Morishita: "Regional differences of phospholipase A_2 activity in the rabbit oviductai epithelium." Prostaglandins Leukotrienes andEssential Fatty Acids. 47. 199-202 (1992)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Morishita: "Changes in phospholipase A_2 activity of the rabbit ampullary epithelium by ovarian steroids." Prostaglandins Leukotrienes and Essential Fatty Acids. 48. 315-318 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Morishita,M.Nozaki,M.Sano,M.Yokoyama,G.Nakamura,H.Nakano: "Regional Differrences of Phosphilipase A_2 Activity in the Rabbit Oviductal Epitheliam." Prostaglandins Loukotriens and Essential Fatly Acids. 47. 199-202 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] T.Morishita,M.Nozaki,M.Sano,M.Yokoyama,G.Nakamura,H.Nakano: "Changes in Phospholipase A_2 Activity of the Rabbit Ampullany Epithelium by Ovarian Steroids." Prostaglandins Loukotriens and Fssential Fatty Acids. 48. (1993)

    • Related Report
      1992 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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