Apolipoprotein E genotype and late paraphrenia

Abstract

Patients with late paraphrenia or late onset schizophrenia frequently have associated cognitive impairment which may in some cases progress to a recognized dementia. The frequency of the apoE ε4 allele is high in individuals who develop Alzheimer's disease. Twenty-three patients with late paraphrenia were genotyped for ApoE. The frequency of the ε4 allele was comparable with that found in a large group of centenarians, but lower than previously reported from populations of normal controls and Alzheimer's disease patients. Two out of three male patients tested had the rare ε2/ε2 genotype, which was not found in any of the females.