首页> 外文期刊>Psychiatry Research. Neuroimaging >Functional magnetic resonance imaging of BDNF val66met polymorphism in unmedicated subjects at high genetic risk of schizophrenia performing a verbal memory task.
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Functional magnetic resonance imaging of BDNF val66met polymorphism in unmedicated subjects at high genetic risk of schizophrenia performing a verbal memory task.

机译:BDNF val66met基因多态性的功能磁共振成像在患有精神分裂症的高遗传风险的非药物治疗受试者中执行口头记忆任务。

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摘要

Multiple strands of evidence suggest a role for Brain Derived Neurotrophic Factor (BDNF) in the pathophysiology of schizophrenia. It is not yet clear, however, how BDNF may contribute to altered brain function seen in the disorder, or in those at high genetic risk. The current study examines functional imaging correlates of the BDNF val66met polymorphism in a population at high genetic risk of schizophrenia. Subjects at high genetic risk for the disorder (n=58) provided both BDNF genotyping and fMRI data while performing a verbal memory task. During encoding, participants were presented with a word and asked to make a 'living'/'non-living' classification. During retrieval, individuals were requested to make an 'old'/'new' word classification. For encoding, we report decreased activation of the inferior occipital cortex and a trend in the cingulate cortex in Val homozygote individuals relative to Met carriers. For retrieval, we report decreases in activation in the prefrontal, cingulate cortex and bilateral posterior parietal regions in Val homozygote individuals versus Met carriers. These findings add to previous evidence suggesting that genetic variation in the BDNF gene modulates prefrontal and limbic functioning and suggests that it may contribute to differences in brain function seen in those at high risk of the disorder.
机译:多种证据表明,脑源性神经营养因子(BDNF)在精神分裂症的病理生理中起作用。然而,尚不清楚BDNF如何导致这种疾病或具有高遗传风险的人大脑功能的改变。当前研究检查了精神分裂症高遗传风险人群中BDNF val66met多态性的功能成像相关性。该疾病有高遗传风险的受试者(n = 58)在执行口头记忆任务时同时提供了BDNF基因分型和fMRI数据。在编码过程中,向参与者展示一个单词,并要求他们进行“有生命” /“无生命”分类。在检索过程中,要求个人对单词进行“旧” /“新”分类。对于编码,我们报道了相对于Met携带者,Val纯合子个体的枕下皮层的激活减少,扣带状皮层的趋势有所降低。为了进行检索,我们报道了Val纯合子个体与Met携带者的前额叶,扣带回皮层和双侧后壁区域的激活减少。这些发现增加了以前的证据,表明BDNF基因的遗传变异调节前额叶和边缘功能,并暗示它可能有助于患高危人群的脑功能差异。

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