No evidence for association between polymorphisms in GRM3 and schizophrenia

Norton, Nadine; Williams, Hywel J.; Dwyer, Sarah; Ivanov, Dobril; Preece, Anna C.; Gerrish, Amy; Williams, Nigel M.; Yerassimou, Pamela; Zammit, Stanley; O'Donovan, Michael C.; Owen, Michael J.
January 2005
BMC Psychiatry;2005, Vol. 5, p1
Academic Journal
Background: Three studies have previously reported data that were interpreted by the authors as supportive of association between schizophrenia and polymorphisms in the gene encoding the metabotropic glutamate receptor GRM3. Methods: In a bid to examine this hypothesis, we examined seven SNPs spanning GRM3 in a UK case-control sample (schizophrenic cases n = 674, controls n = 716). These included all SNPs previously reported to be associated, alone or in haplotypes, with schizophrenia in European or European American samples. Results: Our data showed no evidence for association with single markers, or 2, 3, 4 and 5 marker haplotypes, nor did any specific haplotypes show evidence for association according to previously observed patterns. Conclusion: Examination of our own data and those of other groups leads us to conclude that at present, GRM3 should not be viewed as a gene for which there is replicated evidence for association with schizophrenia.


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