Impact of interacting functional variants in COMT on regional gray matter volume in human brain.

Impact of interacting functional variants in COMT on regional gray matter volume in human brain.
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DOI:
10.1016/j.neuroimage.2008.10.064
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发表时间:
2009-03-01
期刊:
影响因子:
5.7
通讯作者:
Meyer-Lindenberg A
Meyer-Lindenberg A
中科院分区:
医学1区
文献类型:
--
作者:
Honea R;Verchinski BA;Pezawas L;Kolachana BS;Callicott JH;Mattay VS;Weinberger DR;Meyer-Lindenberg A

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儿茶酚-O-甲基转移酶(COMT)基因的功能变体已被证明会影响认知功能,皮质生理学和精神分裂症的风险。最近的一项研究表明,先前报道的功能性val 158 met SNP(rs 4680)对脑功能的影响被该基因中的其他功能性SNP和单倍型修饰,尽管尚不清楚这些影响是否也见于大脑结构。我们使用基于体素的形态测量法,在CBDB/NIMH精神分裂症遗传研究的151名健康志愿者中,研究COMT中多个功能变体对灰质体积的影响。我们发现先前描述的rs 4680瓦尔风险变异影响海马和背外侧前额叶(DLPFC)灰质体积。此外,我们发现这种SNP与P2启动子区(rs 2097603)中的变体相互作用,预测海马灰质体积的变化与细胞外多巴胺的非线性效应一致。我们报告的证据表明,在COMT相互作用的功能变异影响海马和DLPFC的灰质区域体积,提供进一步的生物学影响的COMT复杂的遗传变异在精神分裂症的病理生理学相关的神经系统和扩展观察的非线性依赖性的前额叶神经元细胞外多巴胺的人脑结构域的生物学在体内验证。
Functional variants in the catechol-O-methyltransferase (COMT) gene have been shown to impact cognitive function, cortical physiology and risk for schizophrenia. A recent study showed that previously reported effects of the functional val158met SNP (rs4680) on brain function are modified by other functional SNPs and haplotypes in the gene, though it was unknown if these effects are also seen in brain structure. We used voxel-based morphometry to investigate the impact of multiple functional variants in COMT on gray matter volume in a large group of 151 healthy volunteers from the CBDB/NIMH Genetic Study of Schizophrenia. We found that the previously described rs4680 val risk variant affects hippocampal and dorsolateral prefrontal (DLPFC) gray matter volume. In addition, we found that this SNP interacts with a variant in the P2 promoter region (rs2097603) in predicting changes in hippocampal gray matter volume consistent with a nonlinear effect of extracellular dopamine. We report evidence that interacting functional variants in COMT affect gray matter regional volume in hippocampus and DLPFC, providing further in vivo validation of the biological impact of complex genetic variation in COMT on neural systems relevant for the pathophysiology of schizophrenia and extending observations of nonlinear dependence of prefrontal neurons on extracellular dopamine to the domain of human brain structure.
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