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Human Intelligence Gene Identified By Scientists

Researchers have now identified a gene, DTNBP1 that appears to influence human intelligence. This finding could eventually pave way for improved genetic manipulation techniques to enhance an individual's intellectual skills. //

The researchers examined the genetic constitution of individuals afflicted with schizophrenia; a disorder marked by impairment of cognitive skills and compared this with those of normal individuals. This lead to the discovery that the dysbindin-1 gene (DTNBP1) may be linked to general cognitive ability.

The result of this path-breaking work conducted by researchers at the Zucker Hillside Hospital campus of The Feinstein Institute for Medical Research and Harvard Partners Center for Genetics and Genomics (Boston) can be cited in the online version of Human Molecular Genetics.

'A robust body of evidence suggests that cognitive abilities, particularly intelligence, are significantly influenced by genetic factors. Existing data already suggests that dysbindin may influence cognition,’ said Katherine Burdick, PhD, the study's primary author. ‘We looked at several DNA sequence variations within the dysbindin gene and found one of them to be significantly associated with lower general cognitive ability in carriers of the risk variant compared with non-carriers in two independent groups.'

The study involved 213 unrelated Caucasian patients with schizophrenia or schizoaffective disorder and 126 unrelated healthy Caucasian volunteers. The researchers measured cognitive performance in all subjects. They then analyzed participants' DNA samples. The researchers specifically examined six DNA sequence variations, also known as single nucleotide polymorphisms (SNPs), in the dysbindin gene and found that one specific pattern of SNPs, known as a haplotype, was associated with general cognitive ability: Cognition was significantly impaired in carriers of the risk variant in both the schizophrenia group and the healthy volu
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