alexa Anti-human parvovirus B19 nonstructural protein antibodies in patients with rheumatoid arthritis.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Tzang BS, Tsai CC, Tsay GJ, Wang M, Sun YS,

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Abstract BACKGROUND: Previous studies have reported the association between the development of NS1-specific IgG and arthropathy after the infection of human parvovirus B19 (B19). However, the role of anti-B19-NS1 IgG in RA is still unclear. This study investigated the role of anti-B19-NS1 antibody in patients with rheumatoid arthritis (RA). METHODS: B19-VP IgM and IgG antibodies, nested PCR, B19-NS1 IgM and IgG antibodies, and anti-cyclic citrullinated peptide (CCP) antibodies were assessed by ELISA and Western blot in this study. RESULTS: Significantly higher prevalence of B19-NS1 IgM and IgG antibodies in patients with recent B19 infection was observed as well as the higher prevalence of B19-NS1 IgM and IgG antibodies in RA patients with seronegative diagnostic patterns. However, no significant variation of both B19-NS1 IgM and IgG was detected in RA patients with different B19 diagnostic patterns. Additionally, significantly higher presence of anti-CCP IgG was observed in RA patients with B19-NS1 IgM. CONCLUSIONS: This study suggests the possibility of anti-B19-NS1 IgM as an indicator for RA diagnosis and indicates the suspense of the higher prevalence of anti-B19-NS1 antibody in RA patients with seronegative B19 diagnostic patterns. However, these results provide clues in understanding the association of anti-B19-NS1 antibody in RA patients. This article was published in Clin Chim Acta and referenced in Journal of Clinical & Cellular Immunology

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