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A study of real time liver function assay -Amino acid utility index and protein synthetic rate-

Research Project

Project/Area Number 01570737
Research Category

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

Allocation TypeSingle-year Grants
Research Field Digestive surgery
Research InstitutionChiba University School of Medicine Department of Surgery (II)

Principal Investigator

ASANO Takehide  Chiba University School of Medicine Department of Surgery Assistant, 医学部附属病院二外科, 助手 (80143311)

Co-Investigator(Kenkyū-buntansha) ISONO Kaichi  Professor, 医学部附属病院二外科, 教授 (70009489)
OCHIAI Takenori  Assistant Professor, 医学部附属病院二外科, 講師 (80114255)
ENOMOTO Kazuo  Assistant, 医学部附属病院二外科, 助手 (70223659)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1990: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1989: ¥800,000 (Direct Cost: ¥800,000)
Keywordsliver function test / surgical impairment / amino acids / hepatic amino acid utility rate / hepatic protein synthesis / central plasma clearance rate of amino acids / needle biopsied liver / 肝アミノ酸クリアランス / 肝移植 / 肝切除 / アミノ酸クリアランス / 虚血障害肝 / 筋アミノ酸放出
Research Abstract

Surgical tissue injury accelerates the transfer of amino acids from skeletal muscle to the liver for protein synthesis required for the maintenance of immunocompetence and wound healing. From the experimental studies, hepatic amino acids clearance rate, which was expressed by measuring amino acid concentration in pre and post hepatic blood flow, was concluded as a reliable index of the severity of acute ischemic liver injury. For clinical measurement of this function, we developed a new indicator, the amino acids utility index (AAUI) , by using the rate of muscle release of amino acids (m-RR) and the rate of central plasma clearance of amino acids (CPCR-AA). They are the indices of muscle proteolysis and whole body protein turnover, and AAUI is expressed by the formula. AAUI (ml/micromol)=CPCR-AA/m-RR The value of m-RR as well as CPCR-AA were increased in surgical patients on the 2nd post operative day. The value of AAUI was correlated well with the size of hepatectomy. And it might be a good index for the real time liver function. In the cases of post hepatic liver disorder, AAUI decreased promptly with liver functional damages even in the period of normal data of other liver function indices including arterial ketone body ratio. Hepatic protein synthesis rate (HPS), which was directly measured on needle biopsied liver, was also assessed in hepatectomy patients. It suggested that hepatic functional reserve could be supposed by the value of HPS, since the HPS of liver unit has a upper limit even in the situation of increasing whole body protein requirement such as post hepatectomy. For instances, HPS of cirrhotic changed livers are already accelerated at pre operation due to severity of cirrhosis it and meant these livers have poor functional reserve. Measuring HPS might be a good method to evaluate hepatic functional reserve.

Report

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

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Takesada Goto: "Experimental Studies of Hepatic Clearance Rates of Amino Acids as an Initial Function Test of the Liver Graft." Transplantation Proceedings. 21(1). 2305-2307 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takesada Goto: "Measurement of Protein Synthetic Rate in NeedleーBiopsied Liver." Surgical Research. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takeo Nakagohri: "Use of Hepatic Protein Synthesis Rate in Rate Acute Ischemic Liver to Assess Degrees of Ischemic Injury." Transplantation Proceedings. 21(1). 2292-2293 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 後藤 剛貞: "肝アミノ酸利用率測定による移植肝機能評価" 移植. 25(3). 273-278 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 後藤 剛貞: "アミノ酸利用指数amino acid utility indexによる肝機能評価と手術侵襲" 日本消化器外科学会雑誌. 24(1). 38-44 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 中郡 聡夫: "針生検による肝蛋白合成率(IIPS)測定と肝機能予備力評価への応用" 日本消化器病学会雑誌. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Goto, T. Asano, T. Morita, K. Sakamoto, T. Kenmochi, T. Nakagohri, T. Ochiai and K. Isono: "Experimental Studies of Hepatic Clearance Rates of Amino Acids as an Initial Function Test of the Liver Graft." Transplantation Proceedings. 21(1). 2305-2307 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Goto, T. Asano and T. Morita: "Measurement of Protein Synthetic Rate in Needle-Biopsied Liver" Surgical Research. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Nakagohri, T. Asano, T. Goto, T. Kenmochi K. Sakamoto, T. Ochiai and K. Isono: "Use of Hepatic Protein Synthesis Rate in Rate Acute Ischemic Liver to Assess Degrees of Ischemic Injury" Transplantation Proceedings. 21(1). 2292-2293 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Takesada Goto: "Experimental Studies of Hepatic Clearance Rates of Amino Acids as an Initial Function Test of the Liver Graft." Transplantation Proceedings,. 21(1). 2305-2307 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Takesada Goto: "Measurement of Protein Synthetic Rate in NeedleーBiopsied Liver." Surgical Research. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Takeo Nakagohri: "Use of Hepatic Protein Synthesis Rate in Rate Acute Ischemic Liver to Assess Degrees of Ischemic Injury." Transplantation Proceedings. 21(1). 2292-2293 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 後藤 剛貞: "肝アミノ酸利用率測定による移植肝機能評価" 移植. 25(3). 273-278 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 後藤 剛貞: "アミノ酸利用指数amino acids utility indexによる肝機能評価と手術侵襲" 日本消化器外科学会雑誌. 24(1). 38-44 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 中郡 聡夫: "針生検による肝蛋白合成率(IIPS)測定と肝機能予備力評価への応用" 日本消化器病学会雑誌. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] T.Goto,T.Asano,et al: "Experimental studies of hepatic clearance rate of amino acids as an initial function test of the liver graft." Transpl.Proc. 21(1). 2305-2307 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] T.Nakagohri,T.Asano,et al: "Use of hepatic Protein synthesis rate in acute ischemic liver to assess degrees of ischemic injury." Transpl.Proc.21(1). 2292-2293 (1989)

    • Related Report
      1989 Annual Research Report

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

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