Mutation screening of X-chromosomal neuroligin genes: no mutations in 196 autism probands.
Autism, a childhood neuropsychiatric disorder with a strong genetic component, is currently the focus of considerable attention within the field of human genetics as well many other medical-related disciplines. A recent study has implicated two X-chromosomal neuroligin genes, NLGN3 and NLGN4, as having an etiological role in autism, having identified a frameshift mutation in one gene and a substitution mutation in the other, segregating in multiplex autism spectrum families (Jamain et al. [2003: Nat Genet 34:27-29]). The function of neuroligin as a trigger for synapse formation would suggest that such mutations would likely result in some form of pathological manifestation. Our own study, screening a larger sample of 196 autism probands, failed to identify any mutations that would affect the coding regions of these genes. Our findings suggest that mutations in these two genes are infrequent in autism.
Neurogenetics Section, Centre for Addiction and Mental Health, Toronto, ON, Canada. john_vincent@camh.net
John B
JB
Vincent
Debbie
D
Kolozsvari
Wendy S
WS
Roberts
Patrick F
PF
Bolton
Hugh M D
HM
Gurling
Stephen W
SW
Scherer
D001321:Autistic Disorder / Q000175:diagnosis / Q000235:genetics*; D002352:Carrier Proteins / Q000235:genetics*; D015816:Cell Adhesion Molecules, Neuronal; D041321:Chromosomes, Human, X / Q000235:genetics*; D004252:DNA Mutational Analysis; D005192:Family Health; D005260:Female; D005820:Genetic Testing; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics*; D009154:Mutation; D009419:Nerve Tissue Proteins / Q000235:genetics*
D002352:Carrier Proteins; D015816:Cell Adhesion Molecules, Neuronal; D008565:Membrane Proteins; C430845:NLGN4X protein, human; D009419:Nerve Tissue Proteins; C098004:neuroligin 3