Open AccessInteraction between effects of genes coding for dopamine and glutamate transmission on striatal and parahippocampal function
Author(s) -
Pauli Andreina,
Prata Diana P.,
Mechelli Andrea,
Picchioni Marco,
Fu Cynthia H.Y.,
Chaddock Christopher A.,
Kane Fergus,
Kalidindi Sridevi,
McDonald Colm,
Kravariti Eugenia,
Toulopoulou Timothea,
Bramon Elvira,
Walshe Muriel,
Ehlert Natascha,
Georgiades Anna,
Murray Robin,
Collier David A.,
McGuire Philip
Publication year - 2013
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.22061
Subject(s) - dopamine , dopamine transporter , neuroscience , glutamate receptor , psychology , glutamatergic , parahippocampal gyrus , psychosis , posterior cingulate , ventral striatum , functional magnetic resonance imaging , striatum , medicine , dopaminergic , psychiatry , epilepsy , temporal lobe , receptor
The genes for the dopamine transporter (DAT) and the D‐Amino acid oxidase activator (DAOA or G72) have been independently implicated in the risk for schizophrenia and in bipolar disorder and/or their related intermediate phenotypes. DAT and G72 respectively modulate central dopamine and glutamate transmission, the two systems most robustly implicated in these disorders. Contemporary studies have demonstrated that elevated dopamine function is associated with glutamatergic dysfunction in psychotic disorders. Using functional magnetic resonance imaging we examined whether there was an interaction between the effects of genes that influence dopamine and glutamate transmission (DAT and G72) on regional brain activation during verbal fluency, which is known to be abnormal in psychosis, in 80 healthy volunteers. Significant interactions between the effects of G72 and DAT polymorphisms on activation were evident in the striatum, parahippocampal gyrus, and supramarginal/angular gyri bilaterally, the right insula, in the right pre‐/postcentral and the left posterior cingulate/retrosplenial gyri ( P < 0.05, FDR‐corrected across the whole brain). This provides evidence that interactions between the dopamine and the glutamate system, thought to be altered in psychosis, have an impact in executive processing which can be modulated by common genetic variation. Hum Brain Mapp 34:2244–2258, 2013 . © 2012 Wiley Periodicals, Inc.