Abstract
Cholinergic dysfunction is one of the hypotheses for the cognitive deficits of schizophrenia. Neurocognitive deficits, which are well-described clinical features of schizophrenia, may be remediated by nicotine; therefore investigations of nicotinic receptor subtypes is of considerable clinical interest. We typed polymorphisms in CHRNA4 and CHRNB2 genes controlling the expression of neuronal high-affinity nicotinic receptors in 117 Canadian families having at least one schizophrenic patient. Using a family-based association strategy, we performed allele, haplotype and interaction analysis of these two loci. In the families tested, the two cholinergic genes interact to affect schizophrenia in combination (P=0.010), while neither was sufficient alone to confer susceptibility. Our present study provided the first line of direct evidence suggesting that the CHRNA4 gene combined with CHRNB2 receptor gene may be linked to schizophrenia.
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This work was funded by the Ontario Mental Health Foundation and Canadian Institute Health Research (CIHR) grant # MOP-15007 CIHR.
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Vincenzo De Luca and Sophocles Voineskos have contributed equally to this work
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De Luca, V., Voineskos, S., Wong, G. et al. Genetic interaction between α4 and β2 subunits of high affinity nicotinic receptor: analysis in schizophrenia. Exp Brain Res 174, 292–296 (2006). https://doi.org/10.1007/s00221-006-0458-y
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DOI: https://doi.org/10.1007/s00221-006-0458-y