Metal-induced autoimmunity is a well established but poorly understood
phenomenon. Recent work has begun to elucidate the molecular interact
ions of metal ions with immune cells and self-proteins. Metal-induced
presentation of cryptic self-peptides emerges as a possible mechanism
for activation of 'metal-specific' T cells, challenging the hypothesis
of a random polyclonal activation of T and B cells by metals. A prefe
rential T-helper cell type 2 response is involved in metal ion induced
systemic autoimmune disease.