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Early appearance of neutralizing immunoglobulin G3 antibodies is associated with chikungunya virus clearance and long-term clinical protection



Early appearance of neutralizing immunoglobulin G3 antibodies is associated with chikungunya virus clearance and long-term clinical protection



Journal of Infectious Diseases 205(7): 1147-1154



Chikungunya virus (CHIKV) and related arboviruses have been responsible for large epidemic outbreaks with serious economic and social impact. Although infected individuals clear the virus from the blood, some develop debilitating and prolonged arthralgia. We investigated specificity and strength of antibody responses in a longitudinal study on CHIKV-infected patients and analyzed their association with viral load, cytokine profile, and severity. We found that CHIKV-specific response is dominated by immunoglobulin G3 (IgG3) antibodies. The antibodies were neutralizing, and patients with high viremia rapidly developed high levels of anti-CHIKV antibodies of this specific isotype. Although these patients endured a more severe disease progression during the acute viremic phase, they cleared the virus faster and did not experience persistent arthralgia. However, significant persistent arthralgia was observed in patients with low viremia who developed IgG3 at a later stage. Absence of early CHIKV-specific IgG3 may therefore serve as a specific marker of patients with increased risk of disease.

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Accession: 052755209

Download citation: RISBibTeXText

PMID: 22389226

DOI: 10.1093/infdis/jis033


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