PMID: 2113283Jul 1, 1990Paper

Hepatic catabolism of serum amyloid A during an acute phase response and chronic inflammation

Proceedings of the Society for Experimental Biology and Medicine
C J Gollaher, L L Bausserman

Abstract

Degradation of serum amyloid A (SAA) was studied in isolated perfused livers of mice treated with either a single injection of casein to induce an acute phase response or with 14 daily casein injections to maintain chronic inflammation. Littermates administered sterile saline served as controls. Radioiodinated SAA and apolipoprotein A-I, reconstituted with high-density lipoproteins in vivo, were studied in parallel. Degradation was monitored by appearance of acid-soluble radioactivity in the perfusate. Induction of an acute phase response reduced hepatic catabolism of SAA by 14% (from 8.6 +/- 1.2% to 7.4 +/- 1.1%/g liver in 3 hr, P less than 0.05, n = 16). The acute phase response had no effect on apolipoprotein A-I degradation or bile production. Livers from animals receiving 14 daily injections of casein were 31% less active than control livers at degrading SAA (8.1 +/- 1.6%/g/3 hr for treated group vs. 11.7 +/- 2.3%/g/3 hr for control group, P less than 0.025). Apolipoprotein A-I degradation was decreased but differences were not statistically significant and bile production was the same in both treatment groups. However, livers from treated animals were larger (mean weight 1.8 g) than those from controls (1.5 g) (P less tha...Continue Reading

Citations

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