THERAPEUTIC CLASS
Natural Antibodies Bridge Innate and Adaptive Immunity
Natural Abs, belonging to isotypes IgM, IgG3, and IgA, were discovered nearly half a century ago. Despite knowledge about the role of the polyreactive natural IgM in pathogen elimination, B cell survival and homeostasis, inflammatory diseases, and autoimmunity, there is a lack of clarity about the physiological role of natural IgG and natural IgA because they appear
incapable of recognizing Ags on their own and are perceived as nonreactive
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