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Rituximab reduced the local Th17 response in RA patients, whereas it did not influence Th1 cell, Treg cell, or TNFα responses. The decreased Th17 response was associated with reduced inflammation and better clinical outcome. Moreover, inhibition of the Th17 response by rituximab was lost in the absence of B cells, providing evidence that the effects of rituximab are due to B cell depletion. These data demonstrate an unexpected role of B cells in the development of Th17 responses, which could possibly lead to B cell-based strategies for the treatment of Th17-related autoimmune diseases.
Veerdonk et al. (Fri,) studied this question.
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