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Autoantibody to apolipoprotein A-1 in hepatitis C virus infection: a role in atherosclerosis?

Lookup NU author(s): Dr Simon Bridge, Emeritus Professor Margaret Bassendine

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

© 2018 The Author(s) Background/purpose: One to three per cent of the world’s population has hepatitis C virus (HCV) infection, which is not only a major cause of liver disease and cancer but also associated with an increased risk of atherosclerosis, despite an ostensibly favourable lipid profile. Autoantibodies are frequent in HCV infection and emerging evidence shows that autoantibodies could be valuable for cardiovascular disease (CVD) risk stratification. This study investigated a novel independent biomarker of CVD, autoantibodies to apolipoprotein A-1 (anti-apoA-1 IgG) and lipids in patients with chronic HCV before, during and after direct-acting anti-viral (DAA) therapy. Methods: Eighty-nine blinded serum samples from 27 patients with advanced chronic HCV were assayed for lipids and anti-apoA-1 IgG by ELISA. Results: Pre-treatment HCV viral load correlated with high-density lipoprotein cholesterol (HDL-C, r = 0.417; p = 0.042) and negatively with apolipoprotein (apo)B (r = − 0.497; p = 0.013) and markers of CVD risk, the apoB/apoA-1 ratio (r = − 0.490; p = 0.015) and triglyceride level (TG)/HDL-C ratio (r = − 0.450; p = 0.031). Fourteen (52%) of 27 patients had detectable anti-apoA-1 IgG autoantibodies pre-treatment; only two became undetectable with virological cure. Autoantibody-positive sera had lower apoA-1 (p = 0.012), HDL-C (p = 0.009) and total cholesterol (p = 0.006) levels. Conclusions: This is the first report of the presence of an emerging biomarker for atherosclerosis, anti-apoA-1 IgG, in some patients with HCV infection. It may be induced by apoA-1 on the surface of HCV lipoviral particles. The autoantibodies inversely correlate with apoA-1 and HDL levels and may render HDL dysfunctional. Whether these hypothesis-generating findings have clinical implications in HCV patients requires further study.


Publication metadata

Author(s): Bridge SH, Pagano S, Jones M, Foster GR, Neely D, Vuilleumier N, Bassendine MF

Publication type: Article

Publication status: Published

Journal: Hepatology International

Year: 2018

Volume: 12

Issue: 1

Pages: 17-25

Print publication date: 31/01/2018

Online publication date: 08/02/2018

Acceptance date: 08/01/2018

Date deposited: 22/02/2018

ISSN (print): 1936-0533

ISSN (electronic): 1936-0541

Publisher: Springer India

URL: https://doi.org/10.1007/s12072-018-9842-5

DOI: 10.1007/s12072-018-9842-5


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