Plasma cholesterol homeostasis, HDL remodeling and function during the acute phase reaction

Francesca Zimetti, Stefano De Vuono, Monica Gomaraschi, Maria Pia Adorni, Elda Favari, Nicoletta Ronda, Maria Anastasia Ricci, Fabrizio Veglia, Laura Calabresi, Graziana Lupattelli

Research output: Contribution to journalArticlepeer-review

Abstract

Acute phase reaction (APR) is a systemic inflammation triggered by several conditions associated with lipid profile alterations. We evaluated whether APR also associates with changes in cholesterol synthesis and absorption, HDL structure, composition, and cholesterol efflux capacity (CEC). We analyzed 59 subjects with APR related to infections, oncologic causes, or autoimmune diseases and 39 controls. We detected no difference in markers of cholesterol synthesis and absorption. Conversely, a significant reduction of LpA-I- and LpAI:AII-containing HDL (-28% and -44.8%, respectively) and of medium-sized HDL (-10.5%) occurred in APR. Total HDL CEC was impaired in APR subjects (-18%). Evaluating specific CEC pathways, we found significant reductions in CEC by aqueous diffusion and by the transporters scavenger receptor B-I and ABCG1 (-25.5, -41.1 and -30.4%, respectively). ABCA1-mediated CEC was not affected. Analyses adjusted for age and gender provided similar results. In addition, correcting for HDL-cholesterol (HDL-C) levels, the differences in aqueous diffusion total and ABCG1-CEC remained significant. APR subjects displayed higher levels of HDL serum amyloid A (+20-folds;P= 0.003). In conclusion, APR does not associate with cholesterol synthesis and absorption changes but with alterations of HDL composition and a marked impairment of HDL CEC, partly independent of HDL-C serum level reduction.

Original languageEnglish
Pages (from-to)2051-2060
Number of pages10
JournalJournal of Lipid Research
Volume58
Issue number10
DOIs
Publication statusPublished - Oct 2017

Keywords

  • Journal Article

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