The article you requested is

Voltage-Gated Potassium Channel/LGI1 Antibody–Associated Encephalopathy May Cause Brief Psychotic Disorder

J Clin Psychiatry 2011;72(5):722-723 [letter]

Letter to the Editor

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Voltage-gated potassium channel (VGKC) antibody–associated encephalopathy has been identified as a potentially immunotherapy-responsive form of limbic encephalitis. A recent study showed that the target antigen in this condition is in fact LGI1, a secreted neural protein that functions as a ligand for 2 epilepsy-related proteins, ADAM22 and ADAM23. Limbic encephalitis is typically a paraneoplastic syndrome with a poor prognosis.