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Prostaglandin production in the plerocercoid of Spirometra erinaceieuropaei and its function in larva migrans

Research Project

Project/Area Number 09670260
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 寄生虫学(含医用動物学)
Research InstitutionShimane Medical University

Principal Investigator

FUKUSHIMA Tetsuhito  Shimane Medical University Environmental Medicine Assistant Professor, 医学部, 助手 (90208942)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsSpirometra erinaceieuropaei / plerocercoid / prostaglandin / arachidonic acid / arachidonic acid cascade / larva migrans / host-parasite relationship / Spirometra erinaceieuropae / larve migrans
Research Abstract

The effects of temperature, pH, and host fatty acids on the fatty acid contents of Spirometra erinaceieuropaei plerocercoids were investigated. After 24 hr incubation at 18゚C in host snake serum, omega 6 series fatty acids, especially arachidonic acid, in the phospholipid fraction of the plerocercoids, increased compared with those incubated at 37゚C.The change in the ratio of polyunsaturated to saturated fatty acids in the triglyceride fraction was opposite to that observed for the phospholipid fraction after incubation in physiological saline for 6 hr. At 37゚C, arachidonic acid in the free fatty acid fraction decreased for the first 3 hr, and increased, at 10゚C, however, arachidonic acid in the free fatty acid fraction decreased for the first 1 hr. and increased until 3 hr, and decreased again. The changes of the fatty acid composition of phospholipid and triglyceride fractions in Spirometra eninaceieuropaei plerocercoid were investigated after 0, 0.5, 1, 3, 6 hr with 5 mM arachidonic acid. At 37゚C, arachidonic acid was absorbed and incorporated rapidly in triglyceride fraction and decreased after 2-3 hr, but growth slowly at 10゚C.In the dose-dependent course, PGD_2 was detected in the plerocercoids incubated with 0.5, 1, 2 and 5 mM arachidonic acid and PGE_2 was detected with 2 and 5 mM arachidonic acid. Total amounts of PGD_2 and PGE_2 increased with increased concentrations of arachidonic acid, and PGF_<2 alpha> and 6-keto-PGF_1 alpha were not detected. In the time-dependent course, PGF_1 alpha was first detected at 15 min, thereafter, 6-keto-PGF_1 alpha a was detected at 30 min and PGD_2 and PGE_2 were detected at 1 hr. Thromboxane B_2 was not detected in either the dose-dependent or time-dependent course, and only PGE_2 were detected in the incubation medium with 5mM arachidonic acid at 1 hr.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Gao T.: "Arachidonic acid metabolism to prostaglandin E_2, D_2, F_<2α>, and I_2 in the plerocercoid of Spirometra erinaceieuropaei." Journal of Parasitology. 84. 1107-1111 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fukushima T.: "How does sparganpsis occurr?" Parasitology Today. 15. 124 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Gao T.: "Arachidonic acid metabolism to prostaglandin E_2, D_2, F_<2alpha>, and I_2 in the plerocercoid of Spirometra erinaceieuropaei." J.Parasitol.84. 1107-1111 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Fukushima T.: "How does sparganpsis occurr?" Parasitol.Today. 15. 124 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Gao T.: "Arachidonic acid metabolism to prostaglandin E_2,D_2,F_<2a>,and I_2 in the plerocercoid of Spirometra erinaceieuropaei." Journal of Parasitology. 84. 1107-1111 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fukushima T.: "How does sparganpsis occurr?" Parasitology Today. 15. 124 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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