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Metabolic Regulation in Fatty Acid Elongation System

Research Project

Project/Area Number 01480150
Research Category

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

Allocation TypeSingle-year Grants
Research Field General medical chemistry
Research InstitutionOITA MEDICAL UNIVERSITY

Principal Investigator

TAKESHITA Masazumi  OITA MEDICAL UNIVERSITY, DEPARTMENT OF BIOCHEMISTRY,, 医学部, 教授 (50019551)

Co-Investigator(Kenkyū-buntansha) SHIRABE Komei  OITA MEDICAL UNIVERSITY, DEPARTMENT OF BIOCHEMISTRY,, 医学部, 助手 (50179058)
YOSHIDA Satoshi  OITA MEDICAL UNIVERSITY, DEPARTMENT OF BIOCHEMISTRY,, 医学部, 助教授 (50158440)
YUBISUI Toshitsugu  OITA MEDICAL UNIVERSITY, DEPARTMENT OF BIOCHEMISTRY,, 医学部, 助教授 (00019564)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥6,500,000)
Fiscal Year 1991: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1990: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥3,700,000 (Direct Cost: ¥3,700,000)
Keywordsfatty acid elongation / myelination / fatty acid condensation / monoenoic fatty acid / cytochrome b_5 reductase / site directed mutagenesis / 2-ketoacyl-CoA reductase / hypertension / NADHーシトクロムb_5還元酵素 / 2ーケトアシルCoA還元酵素 / 動脈硬化 / モノ不飽和脂肪酸 / CHAPSO / thiolesterase / 副腎白質ジストロフィ- / 白血球 / 極長鎖脂肪酸 / セレブロシド / 粗面小胞体 / 滑面小胞体 / 脂肪酸伸長 / 脂肪酸縮合 / 脂肪酸水酸化 / ブタ動脈壁細胞 / 牛血清アルブミン
Research Abstract

The microsomal fatty acid elongation system is present ubiquitously in somatic cells. In nervous system it is involved in myilination. In vascular system the system is concemed with atheroscherosis. The elongation reaction consists of four steps:condensation, the first reduction; dehydration and the second reduction. The condensation step has been thought to be a rate limiting step. The first reduction step also possible to be related to regulation. We obtained the following recults in relation to the regulation of fatty acid elongation.
1) We found an activation by SH-reagents and suppression by monoenoic fatty acids of fatty acid elongation. We also found the decrease of fatty acid synthesis in the brain of jimpy mouse and this was regulated in the condensation step.
2) Regulation mechanism of fatty acid elongation in blood vessels has been analyzed. Invouement of fatty acid in blood vessels in terms of hypertension has been shown by wing spontaneously hypertensive rats.
3) Fatty acid elongation in leukocytes and lymphocytes has been analyzed to the level of microsomes. The elongation of 20:0-CoA to 24:0 has been suggested to be distinct to the elongation to 22:0.
4) The NADH-Cytochrome b_5 reductase which is involved in the second step 2-ketoacyl-CoA reductase has been cloaned and its reaction mechanism was analyzed by the method of site directed mutagenesis.

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] Nagai,T.: "Analysis of Mutant NADH-cytochrome b_5 Reductase:Apparent “Type III“Methemoglobinemia can be Explained as Type I with an Unstable Reductase" Blood.(1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ogata,K.: "Spermine Down-regulates Superoxide Generation Induced by fMet-Leu-Phe in Electropermeabilized Human Neutrophils" Biochem.Biophys.Res.Commun.182. 20-26 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Takeshita,M.: "自然発症高血圧ラット循環系におけるホスホリパーゼ活性について" 日本疾患モデル学会記録. 8. 51- (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Shirabe,K.: "Role of Cysteine Residues in Human NADH-Cytochrome b_5 Reductase Studied by Site-directed Mutagenesis" J.Biol.Chem.266(12). 7531-7536 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Takeshita,M.: "Activation of Fatty Acid Condensation in Rat Brain Microsomes" Neurochem.Res.6(2). 174- (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yubisui,T.: "Structural Role of Serine 127 in the NADH-binding Site of Human NADH-Cytochrome b_5 Reductase" J.Biol.Chem.266(10). 66-70 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nagai,T.: "Analysis of Mutant NADH-cytochrome b_5 Reductase : Apparent "Type III" Methemoglobinemia can be Explained as Type I with an Unstable Reductase" Blood. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Ogata,K.: "Spermine Down-regulates Superoxide Generation Induced by fMet-Leu-Phe in Electropermeabilized Human Neutrophils" Biochem.Biophys.Res.Commun.182. 20-26 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Shirabe,K: "Role of Cysteine Residues in Human NADH-Cytochrome b_5 Reductase Studied by Site*ected Mutagenesis" J.Biol.Chem. 266(12). 7531-7536 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Takeshita,M.: "Activation of Fatty Acid Condensation in Rat Brain Microsomes" Neurochem.Res. 16(2). 174 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yubisui,T.: "Structural Role of Serine 127 in the NADH-binding Site of Human NADH-Cytochrome b_5 Reductase" J.Biol.Chem.266(10). 66-70 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Yybisui Toshitugu: "Structural Role of Serine 127 in the NADHーBinding Site of Human NADHーCytochrome b_5 Reductase." Journal of Biological Chemistry. 266. 60-70 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Takeshita Masazumi: "Activation of Fatty Acid Condensation in Rat Brain Microsomes." Neurochemical Research. 16. 174 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Tamura Minoru: "Stabilization of Human Neutrophil NADPHーoxidase Activated in a Cellーfree System by Crosslinking" FASEB Journal. 5. A636 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ogata Kenichi: "Spermine Downーregulates Superoxide Generation Induced by fMetーLeuーPhe in Electropermeabilized Human Neutrophils" Biochemical and Biophysical Research Communications. 182. 20-26 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Yoshida Satoshi: "Change of Conformational Disorder in Membrane Lipids in Pulmonary Artery of Monocrotalineーinjected Rats Detected in situ by Fourier Transform Infrared Spectroscopy" Vibrational Spectroscopy. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kugi Mari: "Characterization of Fatty Acid Elongation System in Porcine Neutrophil Microsomes" Biochimica et Biophysica Acta. 1043. 83-90 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshida Satoshi: "Effect of Anoxia on Carotid of Spontaneously Hypertensive RatーーーStudies by Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy" Journal of Clinical Biochemistry and Nutrition. 8. 41-50 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshida Satoshi: "Specific Inhibition of RedoxーLinked Proton Pump Activity of Cytochrome Oxidase by oleate Hydroperoxide and Involvement of Ferrocytochrome C in the Catabolism of Hydroperoxide" Biochemistry International. 21. 33-40 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Murakami Kazunari: "Effect of FattyーacylーCoAs on the Elongation of Saturated Fatty Acid in Porcine Aorta Microsomes" Biochemistry International. 21. 297-304 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yubisui Toshitsugu: "Rapid Reduction of Methemoglobin in Rat Bone Marrow Erythroid Cells" American Journal of Hematology. 34. 5-7 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yubisui Toshitsugu: "Structural Role of Serine 127 in the NADHーbinding Site of Human NADHーCytochrome b_5 Reductase" The Journal of Biological Chemistry. 266. 66-70 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshida Satoshi: "Effect of Phospholipase A_2 and Free Fatty Acids on Lipid-Protein Interactions in Long-and Very-Long-Chain Fatty Acyl-CoA Elongation Enzyme Systems of Brain Microsomes" Biochimica et Biophysica Acta. 1004. 239-244 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Shirabe Komei: "Expression of Human Erythrocyte NADH-Cytochrome b_5 Reductase as an αーThrombin-Cleavable Fused Protein in Escherichia coli" Biochimica et Biophysica Acta. 1008. 189-192 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Takeshita Masazumi: "Concomitant Decrease in the Elongation and Condensation Activities of Very-Long Chain Fatty Acyl-CoA in Jimpy Mouse" Neurochemistry International. 15. 497-502 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Kugi Mari: "Characterization of Fatty Acid Elongation System in Porcine Neutrophil Microsomes" Biochimica et Biophysica Acta. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yoshida Satoshi: "Effect of Anoxia on Carotid of Spontaneously Hypertensive Rat---Studies by Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy" Journal of Clinical Biochemistry and Nutrition. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yoshida Satoshi: "Specific Inhibition of Redox-Linked Proton Pump Activity of Cytochrome Oxidase by Oleate Hydroperoxide and Involvement of Ferrocytochrome C in Catabolism of the Hydroperoxide" Biochemistry International. (1990)

    • Related Report
      1989 Annual Research Report
  • [Publications] Yubisui Toshitsugu: "Progress in Clinical and Biological Research,Vol.319,The Red Cell" Alan R.Liss,Inc., 686 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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