Evidence for a possible association of neurotrophin receptor (NTRK-3) gene polymorphisms with hippocampal function and schizophrenia.
Altered neurodevelopment and plasticity are implicated in schizophrenia pathology. Based on the important role of neurotrophic factors in brain development and plasticity as well as their extensive expression in hippocampal areas, we hypothesized that a variation in the neurotrophin receptor 3 gene (NTRK-3) is associated to hippocampal function and schizophrenia. Thirty-three tagging NTRK-3 single nucleotide polymorphisms (SNPs) were genotyped in 839 schizophrenia patients and 1473 healthy controls. SNPs that were significantly associated with schizophrenia were evaluated in subgroups of the sample with neuropsychological test battery (n=104 patients and 175 controls) and functional magnetic resonance imaging tests of hippocampal function (n=36 controls). rs999905 was nominally significantly associated with schizophrenia and the haplotype block that included markers rs999905 and rs4887348 remained significant after permutation tests. These gene variants are also related to in vivo brain function in healthy control subjects, shown by a significant association with hippocampal activation during an encoding task. The present results, although not robust, suggest that the NTRK-3 gene influences hippocampal function and may modify the risk for schizophrenia.
Institute of Psychiatry, University of Oslo, Oslo, Norway.
Mona K
MK
Otnaess
Srdjan
S
Djurovic
Lars M
LM
Rimol
Bettina
B
Kulle
Anna K
AK
Kähler
Erik G
EG
Jönsson
Ingrid
I
Agartz
Kjetil
K
Sundet
Håkan
H
Hall
Sally
S
Timm
Thomas
T
Hansen
Joseph H
JH
Callicott
Ingrid
I
Melle
Thomas
T
Werge
Ole A
OA
Andreassen
D000328:Adult; D004252:DNA Mutational Analysis; D005260:Female; D006239:Haplotypes; D006624:Hippocampus / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D010364:Pattern Recognition, Visual / Q000502:physiology; D020641:Polymorphism, Single Nucleotide; D020812:Receptor, trkC / Q000235:genetics*; D021641:Recognition, Psychology / Q000502:physiology; D012559:Schizophrenia / Q000235:genetics*
D020812:Receptor, trkC