Plasma amino acid patterns in experimental acute hepatic failure: comparison between hepatectomy and liver devascularization in pigs.

Abstract:

:To clarify the physiopathologic mechanism leading to a marked increase in aromatic amino acids (AAA) in acute hepatic failure (AHF), we compared two experimental models of AHF. Ten pigs were submitted to one-stage hepatic devascularization (group A); in eight other pigs total hepatectomy was performed (group B). The animals were maintained under constant glucose infusion. The mean survival time in group A was 23 +/- 2 hours; after hepatectomy it was 30 +/- 4 hours. Hepatic coma progressively deepened from 8 +/- 3 hours in Group A animals and was delayed until 17 +/- 5 hours in the anhepatic pigs. AAA, methionine, and tryptophan immediately increased markedly in pigs with liver ischemia. In group B animals, AAA showed a slight increase only 18 hours after hepatectomy, whereas there were no significant differences in methionine and tryptophan. The different amino acid patterns in the two groups of animals demonstrate that hepatocyte necrosis is a major source of plasma amino acids after liver devascularization. The slight increase in AAA after total hepatectomy suggests that a release mechanism from muscular mass is involved in the later stages of the experiment. The onset of coma is related to the increase in AAA rather than to alterations in blood ammonia that did not differ in either group of animals.

journal_name

Surgery

journal_title

Surgery

authors

Mazziotti A,Bernardi M,Antonini L,Dioguardi FS,Bellusci R,Papa V,Tacconi C,Gasbarrini G,Cavallari A,Possati L

subject

Has Abstract

pub_date

1981-09-01 00:00:00

pages

527-34

issue

3

eissn

0039-6060

issn

1532-7361

journal_volume

90

pub_type

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