LAG-3 Inhibitory Receptor Expression Identifies Immunosuppressive Natural Regulatory Plasma Cells

Plasma cells secrete antibodies and play a key role in host defense against infection. Lino et al. identify a novel subset of natural regulatory plasma cells characterized by the expression of LAG-3 that develops at steady state independently of microbiota, and respond to innate stimulation by producing immunosuppressive IL-10.

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