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. 2010 Sep;44(12):795-8.
doi: 10.1016/j.jpsychires.2010.01.012. Epub 2010 Feb 24.

Evidence of Association of KIBRA Genotype With Episodic Memory in Families of Psychotic Patients and Controls

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Evidence of Association of KIBRA Genotype With Episodic Memory in Families of Psychotic Patients and Controls

Evangelos Vassos et al. J Psychiatr Res. .

Abstract

The first genome-wide association study of human memory identified an association between a common T/C polymorphism of the KIBRA gene (rs17070145) and episodic memory performance in normal individuals; subsequent studies have implicated the same polymorphism in Alzheimer's disease. Since impaired neurocognitive performance, including memory, may be both a core feature of schizophrenia and a candidate endophenotype, we attempted to replicate this association in a total sample of 544 subjects (including patients with psychosis, their unaffected relatives as well as normal individuals). In the combined sample there was a significant association between the KIBRA T allele and better performance in the single principle component of the memory measures, which included immediate and delayed logical and visual memory from the Wechsler Memory Scale (p=0.019). In the unaffected individuals (patients' relatives and healthy controls) we observed an association of KIBRA with immediate and delayed logical memory (p=0.020 and 0.025, respectively), while in patients with psychosis with delayed visual memory (p=0.05). This study replicates the association between the KIBRA gene and episodic memory and suggests a possibly differential effect of the polymorphism in psychotic and non-psychotic individuals.

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