Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
SHR Neuro Krebs Kardio Lipid Stoffw Microb
Lionel, AC; Vaags, AK; Sato, D; Gazzellone, MJ; Mitchell, EB; Chen, HY; Costain, G; Walker, S; Egger, G; Thiruvahindrapuram, B; Merico, D; Prasad, A; Anagnostou, E; Fombonne, E; Zwaigenbaum, L; Roberts, W; Szatmari, P; Fernandez, BA; Georgieva, L; Brzustowicz, LM; Roetzer, K; Kaschnitz, W; Vincent, JB; Windpassinger, C; Marshall, CR; Trifiletti, RR; Kirmani, S; Kirov, G; Petek, E; Hodge, JC; Bassett, AS; Scherer, SW.
Rare exonic deletions implicate the synaptic organizer Gephyrin (GPHN) in risk for autism, schizophrenia and seizures.
Hum Mol Genet. 2013; 22(10):2055-2066
Doi: 10.1093/hmg/ddt056
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- Co-Autor*innen der Med Uni Graz
- Kaschnitz Wolfgang
- Petek Erwin
- Rötzer Katharina Magdalena
- Windpassinger Christian
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- Abstract:
- The GPHN gene codes for gephyrin, a key scaffolding protein in the neuronal postsynaptic membrane, responsible for the clustering and localization of glycine and GABA receptors at inhibitory synapses. Gephyrin has well-established functional links with several synaptic proteins that have been implicated in genetic risk for neurodevelopmental disorders such as autism spectrum disorder (ASD), schizophrenia and epilepsy including the neuroligins (NLGN2, NLGN4), the neurexins (NRXN1, NRXN2, NRXN3) and collybistin (ARHGEF9). Moreover, temporal lobe epilepsy has been linked to abnormally spliced GPHN mRNA lacking exons encoding the G-domain of the gephyrin protein, potentially arising due to cellular stress associated with epileptogenesis such as temperature and alkalosis. Here, we present clinical and genomic characterization of six unrelated subjects, with a range of neurodevelopmental diagnoses including ASD, schizophrenia or seizures, who possess rare de novo or inherited hemizygous microdeletions overlapping exons of GPHN at chromosome 14q23.3. The region of common overlap across the deletions encompasses exons 3-5, corresponding to the G-domain of the gephyrin protein. These findings, together with previous reports of homozygous GPHN mutations in connection with autosomal recessive molybdenum cofactor deficiency, will aid in clinical genetic interpretation of the GPHN mutation spectrum. Our data also add to the accumulating evidence implicating neuronal synaptic gene products as key molecular factors underlying the etiologies of a diverse range of neurodevelopmental conditions.
- Find related publications in this database (using NLM MeSH Indexing)
- Autistic Disorder -
- Base Sequence -
- Carrier Proteins - genetics
- Cell Adhesion Molecules, Neuronal - genetics
- Chromosomes, Human, Pair 14 - genetics
- Exons -
- Female -
- Guanine Nucleotide Exchange Factors - genetics
- Humans -
- Male -
- Membrane Proteins - genetics
- Nerve Tissue Proteins - genetics
- RNA Splicing - genetics
- Receptors, GABA - genetics
- Receptors, Glycine - genetics
- Rho Guanine Nucleotide Exchange Factors -
- Schizophrenia - genetics
- Seizures - genetics
- Sequence Deletion -
- Synaptic Membranes - genetics