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Parvovirus B19 and immune disorders.
Agostino Pugliese1, Tiziana Beltramo, Donato Torre
1Department of Medical and Surgical Sciences, Clinical Microbiology University of Turin, Amedeo di Savoia Hospital, Turin, Italy. agostino.pugliese@unito.it
Cell Biochemistry and Function
|August 19, 2006
Summary
Parvovirus B19 (PVB19) infection is linked to autoimmune diseases like Systemic Lupus Erythematosus (SLE). Researchers found higher PVB19 seroprevalence in SLE patients compared to healthy controls, suggesting a potential correlation.
Area of Science:
- Immunology
- Virology
- Rheumatology
Background:
- Parvovirus B19 (PVB19) causes erythema infectiosum and can lead to severe complications, including fetal hydrops and hematological issues.
- Emerging evidence suggests a potential role for PVB19 infection in the development of certain autoimmune diseases.
- Understanding the seroprevalence of PVB19 in autoimmune conditions is crucial for elucidating potential etiological links.
Purpose of the Study:
- To investigate the seroprevalence of Parvovirus B19 (PVB19) in patients with autoimmune and dysreactive pathologies.
- To evaluate the correlation between PVB19 infection and Systemic Lupus Erythematosus (SLE), cryoglobulinemia, ANCA-associated vasculitis, and rheumatoid arthritis (RA).
- To compare PVB19 seropositivity rates and IgG antibody titers between patient groups and healthy blood donors.
Main Methods:
- Serological testing for PVB19 IgG antibodies was performed on patients diagnosed with SLE, cryoglobulinemia, vasculitis, and RA.
- Control groups of healthy blood donors were included for comparative analysis of seroprevalence.
- Statistical analysis, including comparison of percentages and mean antibody titers (Units Index - UI), was conducted to determine significant differences (p-values).
Main Results:
- A significantly higher seroprevalence of PVB19 was observed in SLE patients (73.8%) compared to controls (50%, p < 0.05).
- Mean IgG antibody titers against PVB19 were significantly higher in SLE patients than in controls (p < 0.001).
- While seropositivity rates for cryoglobulinemia (64.9%) and vasculitis (52.9%) were not significantly different from controls (50%), mean antibody titers in cryoglobulinemia patients showed a significant difference (p = 0.019).
Conclusions:
- The findings support a potential correlation between prior Parvovirus B19 infection and the development of Systemic Lupus Erythematosus (SLE).
- The study suggests possible implications of PVB19 in cryoglobulinemia, particularly in HCV-positive patients with systemic or nephropathic forms.
- Further research into the role of infectious cofactors, like PVB19, in the pathogenesis of autoimmune diseases is warranted.