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Abstract
Lymphatic filariasis, a chronic disfiguring disease exhibits complex pathology. Based on different clinical manifestations, infected individuals are categorized into asymptomatic-carriers and chronic-patients. The mechanism behind differential clinical outcomes remains unclear. Roles of filaria-specific B cell responses in filariasis have been documented, whereas the contribution of B1 cell response and poly-specific IgG and IgA in the context of clinical filariasis is not deciphered. In this study, we measured the poly-specific IgG and IgA levels in different clinical categories of filariasis. Asymptomatic-carriers exhibited increased IgG4 antibodies against both filarial-antigens as well as auto-antigens compared to other clinical categories, although IgG against these auto-antigens remained lower. IgA levels against both filarial and auto-antigens were decreased in asymptomatic-carriers. A positive correlation between anti-filarial IgG4 and IgG4 against auto-antigens were observed, suggesting the synergistic role of poly-specific natural IgG4 with anti-filarial IgG4 in blocking the pathogenesis in asymptomatic microfilarial cases.
Published Version
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