Hepatic Function Measured by Amino Acid Utility Index (AAUI) and Surgical Stress

Takesada Goto, Takehide Asano, Kazuo Watanabe, Toshio Nakagohri, Takashi Kenmochi, Takeshi Uematsu, Kazuo Enomoto, Kaoru Sakamoto, Takenori Ochiai, Kaichi Isono

Research output: Contribution to journalArticle

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. For clinical measurement of this function, we developed a new indicator, the amino acid utility index (AAUI), by using the rate of muscle release of amino acid (m-RR) and the rate of central plasma clearance of amino acids (CPCR-AA) reported by Clowes et al in 1984. They are the indexes of muscle proteolysis and whole body protein turnover, and AAUI is expressed by the formula. AAUI (ml/µmol)=CPCR-AA/m-RR Thirty patients were studied before and after recovery from surgical stress and were divided into four groups. In group 1, the control, seven patients with normal liver function had received esophagectomy. In group 2, nine patients had received hepatectomy of one segmentectomy or smaller resection. In group 3, ten patients had received hepatectomy of 2 or 3 segmentecotmies. In group 4, four patients had died of liver failure after hepatecotmy. According to the degree of surgical stress, the values of m-RR as well as CPCR-AA were increased in each group on the 2nd post-operative day. But the values of AAUI were 7.8 ± 0.9 (group 1), 8.2 ± 2.1 (group 2), 4.7 ± 2.1 (group 3) and in group 4 marked decrease below 3.0 was noted during the immediate postoperative period. This finding suggests that AAUI can be a clinical prognostic index for estimating hepatic function without the influence of surgical stress.

Original languageEnglish
Pages (from-to)38-44
Number of pages7
JournalThe Japanese Journal Of Gastroenterological Surgery
Volume24
Issue number1
DOIs
Publication statusPublished - 01-02-1991

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Amino Acids
Liver
Hepatectomy
Immunocompetence
Muscles
Esophagectomy
Segmental Mastectomy
Intraoperative Complications
Liver Failure
Postoperative Period
Wound Healing
Proteolysis
Skeletal Muscle
Proteins
Maintenance
Control Groups

All Science Journal Classification (ASJC) codes

  • Surgery
  • Gastroenterology

Cite this

Goto, Takesada ; Asano, Takehide ; Watanabe, Kazuo ; Nakagohri, Toshio ; Kenmochi, Takashi ; Uematsu, Takeshi ; Enomoto, Kazuo ; Sakamoto, Kaoru ; Ochiai, Takenori ; Isono, Kaichi. / Hepatic Function Measured by Amino Acid Utility Index (AAUI) and Surgical Stress. In: The Japanese Journal Of Gastroenterological Surgery. 1991 ; Vol. 24, No. 1. pp. 38-44.
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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. For clinical measurement of this function, we developed a new indicator, the amino acid utility index (AAUI), by using the rate of muscle release of amino acid (m-RR) and the rate of central plasma clearance of amino acids (CPCR-AA) reported by Clowes et al in 1984. They are the indexes of muscle proteolysis and whole body protein turnover, and AAUI is expressed by the formula. AAUI (ml/µmol)=CPCR-AA/m-RR Thirty patients were studied before and after recovery from surgical stress and were divided into four groups. In group 1, the control, seven patients with normal liver function had received esophagectomy. In group 2, nine patients had received hepatectomy of one segmentectomy or smaller resection. In group 3, ten patients had received hepatectomy of 2 or 3 segmentecotmies. In group 4, four patients had died of liver failure after hepatecotmy. According to the degree of surgical stress, the values of m-RR as well as CPCR-AA were increased in each group on the 2nd post-operative day. But the values of AAUI were 7.8 ± 0.9 (group 1), 8.2 ± 2.1 (group 2), 4.7 ± 2.1 (group 3) and in group 4 marked decrease below 3.0 was noted during the immediate postoperative period. This finding suggests that AAUI can be a clinical prognostic index for estimating hepatic function without the influence of surgical stress.",
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Goto, T, Asano, T, Watanabe, K, Nakagohri, T, Kenmochi, T, Uematsu, T, Enomoto, K, Sakamoto, K, Ochiai, T & Isono, K 1991, 'Hepatic Function Measured by Amino Acid Utility Index (AAUI) and Surgical Stress', The Japanese Journal Of Gastroenterological Surgery, vol. 24, no. 1, pp. 38-44. https://doi.org/10.5833/jjgs.24.38

Hepatic Function Measured by Amino Acid Utility Index (AAUI) and Surgical Stress. / Goto, Takesada; Asano, Takehide; Watanabe, Kazuo; Nakagohri, Toshio; Kenmochi, Takashi; Uematsu, Takeshi; Enomoto, Kazuo; Sakamoto, Kaoru; Ochiai, Takenori; Isono, Kaichi.

In: The Japanese Journal Of Gastroenterological Surgery, Vol. 24, No. 1, 01.02.1991, p. 38-44.

Research output: Contribution to journalArticle

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AU - Kenmochi, Takashi

AU - Uematsu, Takeshi

AU - Enomoto, Kazuo

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AU - Isono, Kaichi

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