PMID: 9165109Apr 25, 1997Paper

Acute inflammation, acute phase serum amyloid A and cholesterol metabolism in the mouse

Biochimica Et Biophysica Acta
E LindhorstR Kisilevsky

Abstract

Acute inflammation results in a profound change in the apolipoprotein composition of high density lipoprotein (HDL). Several isoforms of the serum amyloid A (SAA) family, SAA1 and SAA2, become major components of HDL. This structural relationship has suggested that acute phase SAA plays some as yet unidentified role in HDL function, possibly related to cholesterol transport, during the course of acute inflammation. Using subcutaneous AgNO3 to induce a sterile abscess changes in plasma cholesterol and SAA were monitored over the subsequent 144 h. Total plasma cholesterol began to increase within 12 h of the induction of inflammation and reached a peak in 24 h. Thereafter its plasma levels fell returning to normal values by 96-120 h. The bulk of the increase in plasma cholesterol was found in the free cholesterol fraction of HDL. This pattern of cholesterol increase corresponds to the established temporal changes for acute phase SAA (AP-SAA). AP-SAA levels increased within 8 h of the induction of inflammation and reached a peak at 24 h. They began to decrease by 48 h with small quantites still present 120 h later. In concert, but inversely, with the changes in AP-SAA the apoA-I, apoA-II, and apo-E, content of HDL decreased during...Continue Reading

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