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  • Title: Glutathione S-transferase K1 genotype and overweight status in schizophrenia patients: A pilot study.
    Author: Oniki K, Kamihashi R, Tomita T, Ishioka M, Yoshimori Y, Osaki N, Tsuchimine S, Sugawara N, Kajiwara A, Morita K, Miyata K, Otake K, Nakagawa K, Ogata Y, Saruwatari J, Yasui-Furukori N.
    Journal: Psychiatry Res; 2016 May 30; 239():190-5. PubMed ID: 27010189.
    Abstract:
    Elevated oxidative stress in mitochondria and mitochondrial dysfunction are associated with weight gain in schizophrenia (SCZ) patients. Glutathione S-transferase kappa 1 (GSTK1) protects cells against exogenous and endogenous oxidative stress in the mitochondria. This exploratory study investigated the possible effects of a common GSTK1 polymorphism (rs1917760, G-1308T) on the risk for overweight status among 329 SCZ patients and 305 age- and gender-matched controls and on the GSTK1 mRNA level in peripheral blood mononuclear cells among 14 SCZ patients. The GSTK1 T/T genotype was associated with having a higher BMI value among SCZ male patients, whereas this genotype tended to be associated with a lower BMI value among female patients. Conversely, these associations were not observed among the controls. The GSTK1 T/T genotype was associated with decreased GSTK1 mRNA level among SCZ patients. The GSTK1 T/T genotype may be a novel risk factor for the prediction of overweight status in SCZ male patients, although the results of this pilot study should be verified by a larger study.
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