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Polymyositis/dermatomyositis and nasopharyngeal carcinoma: the Epstein-Barr virus connection?
MedLine Citation:
PMID:  20934910     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
BACKGROUND: Polymyositis (PM) and dermatomyositis (DM) are associated with high risk of nasopharyngeal carcinoma (NPC) in Asian countries. Epstein-Barr virus (EBV) might induce autoimmunity and malignancies in susceptible individuals.
OBJECTIVES: To investigate the association of EBV with PM/DM and NPC in PM/DM patients.
STUDY DESIGN: Serum levels of anti-EBV viral capsid antigens (VCA) and anti-EBV-coded nuclear antigens-1 (EBNA-1) antibodies were measured by ELISA, and EBV DNA loads were determined using real-time PCR for 98 PM/DM patients, 94 systemic lupus erythematosus (SLE) patients and 370 healthy controls (HC). Anti-transfer-RNA synthetase antibodies (ASA) were determined by radioimmunoprecipitation for PM/DM patients.
RESULTS: Thirteen (13.3%) of PM/DM patients vs. none of SLE patients had detectable NPC. ASA were detectable in 31.7% of PM/DM without malignancy, while lack of ASA in any PM/DM patient with NPC. IgA anti-EBNA-1 were detectable in 30.6% of PM/DM patients and 31.9% of SLE patients, but only in 4.1% of HC (odds ratio [OR] 10.44 and 11.12 respectively, both p<0.001). Significantly higher positivity for IgA anti-EBNA-1 were observed in PM/DM with NPC than in those without malignancy (OR 44.7, p<0.01). Significantly higher positivity for EBV genome were observed in PM/DM with NPC than in those without malignancy (OR 43.9, p<0.01), in SLE patients (OR 13.2, p<0.05) and in HC (OR 99.4, p<0.001). EBV DNA loads were significantly higher in PM/DM with NPC compared with those without malignancy and HC.
CONCLUSIONS: Our results showed a positive association of EBV with PM/DM and NPC. PM/DM patients who have IgA anti-EBNA-1 or increased EBV DNA loads should be highly suspected to have occult NPC.
Authors:
Der-Yuan Chen; Yi-Ming Chen; Joung-Liang Lan; Hsin-Hua Chen; Chia-Wei Hsieh; Shiow-Jiuan Wey; John Jenn-Yenn Lu
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-08
Journal Detail:
Title:  Journal of clinical virology : the official publication of the Pan American Society for Clinical Virology     Volume:  49     ISSN:  1873-5967     ISO Abbreviation:  J. Clin. Virol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9815671     Medline TA:  J Clin Virol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  290-5     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Affiliation:
Division of Allergy, Immunology and Rheumatology, Taichung Veterans General Hospital, Taichung, Taiwan.
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