Myocarditis, or inflammation of the heart, is a potentially devastating disease that can result from both viral infection and autoimmune attack of self antigens in the heart. In the current issue of the JCI, Lv and colleagues use a genetically susceptible mouse model to show that myocarditis is a T cell–mediated autoimmune disease that occurs due to insufficient thymic negative selection of α-myosin–reactive T cells.
Todd C. Metzger, Mark S. Anderson
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