Increased cardiac injury in NZB/W F1 mice received antibody against human parvovirus B19 VP1 unique region protein
- PMID: 21555155
- DOI: 10.1016/j.molimm.2011.04.013
Increased cardiac injury in NZB/W F1 mice received antibody against human parvovirus B19 VP1 unique region protein
Abstract
Human parvovirus B19 (B19) infection has been postulated to both myocardial injury and development of systemic lupus erythematosus (SLE). However, the influence of anti-B19-VP1u antibodies on cardiac disorders in SLE is still obscure. To elucidate the effects of anti-B19-VP1u IgG in SLE, passive transfer of PBS, normal rabbit IgG or rabbit anti-B19-VP1u IgG was injected intravenously into NZB/W F1 mice, respectively. Significant expression of IL-1β, IL-6 and TNF-α were detected in NZB/W F1 mice receiving rabbit anti-B19-VP1u IgG. Markedly cardiomyocyte disarray and lymphocyte infiltration were observed in left ventricle of hearts from NZB/W F1 mice receiving rabbit anti-B19-VP1u IgG. Additionally, significant increases of matrix metalloproteinase-9 (MMP9) activity and protein expression were detected in left ventricle of hearts from NZB/W F1 mice receiving B19-VP1u IgG. Accordingly, significant increase of phosphorylated p-38 and NF-κB proteins were observed in left ventricle of hearts from NZB/W F1 mice receiving B19-VP1u IgG. However, no significant variation of cardiac atrial natriuretic peptide (ANP), brain natriuretic peptide (BNP), heart-type fatty acid-binding protein (h-FABP) and creatine kinase MB (CK-MB) were detected among all experimental groups. These findings firstly demonstrated the aggravated effects of anti-B19 VP1u IgG on cardiac injury by induction of inflammatory but not myocardial infarction-associated proteins through activation of phosphorylated p-38 and NF-κB signaling.
Copyright © 2011 Elsevier Ltd. All rights reserved.
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