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Synergistic association of mitochondrial uncoupling protein (UCP) genes with schizophrenia.

Authors: Yasuno, K  Ando, S  Misumi, S  Makino, S  Kulski, JK  Muratake, T  Kaneko, N  Amagane, H  Someya, T  Inoko, H  Suga, H  Kanemoto, K  Tamiya, G 
Citation: Yasuno K, etal., Am J Med Genet B Neuropsychiatr Genet. 2007 Mar 5;144B(2):250-3.
Pubmed: (View Article at PubMed) PMID:17066476
DOI: Full-text: DOI:10.1002/ajmg.b.30443

Many studies suggest that mitochondrial dysfunction is involved in the pathophysiology of schizophrenia. We performed a case-control study using tag SNPs in the mitochondrial uncoupling protein genes, UCP2, UCP4, and BMCP1/UCP5, to investigate their association with schizophrenia. These neuronal UCPs are expressed in various brain tissues and may exert a neuroprotective effect against increased oxidative stress. We found modest associations between schizophrenia and the four tag SNPs, rs660339 (odds ratio (OR) = 1.330; P = 0.0043) and rs649446 (OR = 0.739; P = 0.0069) in UCP2, and rs10807344 (OR = 0.622; P = 0.0029) and rs2270450 (OR = 0.704; P = 0.0043) in UCP4, all of which were statistically significant even after correcting for multiple comparisons. Moreover, we found a statistically significant synergistic interaction between UCP2 and UCP4 by using the multifactor dimensionality reduction (MDR) method. The synergistic interaction was also confirmed by the logistic regression analysis, where the maximal OR was obtained when the risk alleles at rs660339 and rs10807344 were simultaneously homozygous. Individuals possessing homozygous risk alleles at these two loci have a 7.6-fold risk of developing schizophrenia compared with those of minimal OR. Our findings suggest that UCP2 and UCP4 have a modest but important involvement in the genetic etiology of schizophrenia. This is the first report of the association between schizophrenia and neuronal UCPs.

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RGD Object Information
RGD ID: 6482844
Created: 2012-05-07
Species: All species
Last Modified: 2012-05-07
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.