T-helper type 2 responses have been presumed to be pathogenic in this disease, and a high proportion of patients with IgG4-RD are reported to have longstanding allergies, peripheral blood eosinophilia, and serum IgE elevation. It has therefore been proposed that allergic mechanisms drive IgG4-RD...
T follicular helper cells, which are the directors and limiters of this process, furnish supporting signals to B cells, which internalize, process, and present cognate antigens in accordance with their B cell receptor's (BCR) binding strength. According to this model, the B-cell receptor (BCR...