Analysis of Serum Cholesterol Efflux Capacity in a Minipig Model of Nonischemic Heart Failure

作者：Bigazzi Federico; Adorni Maria Pia; Puntoni Mariarita; Sbrana Francesco^*; Lionetti Vincenzo; Dal Pino Beatrice; Favari Elda; Recchia Fabio A; Bernini Franco; Sampietro Tiziana

来源：Journal of Atherosclerosis and Thrombosis, 2017, 24(8): 853-862.

DOI：10.5551/jat.37101

• Cholesterol efflux
• HDL
• Minipig
• Non-ischemic heart failure

Aim: Circulating levels of high-density lipoprotein cholesterol (HDL-C) are decreased in patients with heart failure (HF). We tested whether HDL-C serum levels are associated with cardiac contractile dysfunction in a minipig HF model.
Methods: Blood samples were collected from 13 adult male minipigs: 1) before pacemaker implantation, 2) 10 days after surgery, and 3) 3 weeks after high-rate LV pacing. Serum cholesterol efflux capacity (CEC), an index of HDL functionality, was assessed through four mechanisms: ATP Binding Cassette transporter A1 (ABCA1), ATP Binding Cassette transporter G1 (ABCG1), Scavenger Receptor-Class B Type I (SR-BI) and Passive Diffusion (PD).
Results: HDL-C serum levels significantly decrease in minipigs with HF compared with baseline (p < 0.0001). Serum CEC mediated by PD and SR-BI, but not ABCA1 or ABCG1, significantly decrease in animals with HF (p < 0.05 and p < 0.005, respectively).
Discussion: HDL-C serum levels and partial serum CEC reduction may play a pathophysiological role in the cardiac function decay sustained by high-rate LV pacing, opening new avenues to understand of the pathogenesis of nonischemic myocardial remodeling.

• 出版日期2017