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A Common Polymorphism in SCN2A Predicts General Cognitive Ability through Effects on PFC Physiology.


ABSTRACT: Here we provide novel convergent evidence across three independent cohorts of healthy adults (n = 531), demonstrating that a common polymorphism in the gene encoding the ?2 subunit of neuronal voltage-gated type II sodium channels (SCN2A) predicts human general cognitive ability or "g." Using meta-analysis, we demonstrate that the minor T allele of a common polymorphism (rs10174400) in SCN2A is associated with significantly higher "g" independent of gender and age. We further demonstrate using resting-state fMRI data from our discovery cohort (n = 236) that this genetic advantage may be mediated by increased capacity for information processing between the dorsolateral PFC and dorsal ACC, which support higher cognitive functions. Collectively, these findings fill a gap in our understanding of the genetics of general cognitive ability and highlight a specific neural mechanism through which a common polymorphism shapes interindividual variation in "g."

SUBMITTER: Scult MA 

PROVIDER: S-EPMC4692714 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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A Common Polymorphism in SCN2A Predicts General Cognitive Ability through Effects on PFC Physiology.

Scult Matthew A MA   Trampush Joey W JW   Zheng Fengyu F   Conley Emily Drabant ED   Lencz Todd T   Malhotra Anil K AK   Dickinson Dwight D   Weinberger Daniel R DR   Hariri Ahmad R AR  

Journal of cognitive neuroscience 20150511 9


Here we provide novel convergent evidence across three independent cohorts of healthy adults (n = 531), demonstrating that a common polymorphism in the gene encoding the α2 subunit of neuronal voltage-gated type II sodium channels (SCN2A) predicts human general cognitive ability or "g." Using meta-analysis, we demonstrate that the minor T allele of a common polymorphism (rs10174400) in SCN2A is associated with significantly higher "g" independent of gender and age. We further demonstrate using r  ...[more]

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