Abstract
Current B cell-directed therapies for multiple sclerosis impact multiple B cell functions. CD98hc enables B cell clonal expansion and antibody production. I probed the relative importance of autoantibody secretion vs. other B cell functions in MS and targeted CD98hc as a possible therapeutic strategy. I report that the loss of CD98hc function in B cells largely prevents autoantibody production while preserving antigen-presenting and T cell-directing capacities. Mice lacking CD98hc in B cells are protected from EAE; importantly this is overcome with autoantibody-containing plasma. Thus CD98hc blockade is a possible avenue to treat MS by inhibiting clonal expansion and autoantibody.
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