An<unk>  is an antibody (a type of protein) manufactured by the immune system that is directed against one or more of the individual's own proteins.
Many autoimmune diseases in humans, most notably lupus erythematosus, are caused by such<unk> es.
Autoantibody
Antibodies
Immune complex
Medication
Autoimmunity
Immunosuppressive drug
Inflammation
Neurotoxin