Send to

Choose Destination
See comment in PubMed Commons below
Eur J Hum Genet. 2013 Jan;21(1):112-4. doi: 10.1038/ejhg.2012.97. Epub 2012 Jun 6.

Partial deletion of GLRB and GRIA2 in a patient with intellectual disability.

Author information

Institut für Klinische Genetik, Medizinische Fakultät Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.


We report about the partial de novo loss of GLRB and GRIA2 in an individual with intellectual disability (ID). No additional mutations were found in either gene. GLRB itself does not seem to be a good candidate as it causes autosomal recessive hyperekplexia and no symptoms were found in the patient. Mutations of GRIA2 have not been described as cause of ID to date. Nonetheless, it is a very attractive candidate because it encodes a subunit of a glutamate receptor, which is highly expressed in postsynaptic structures and has an important role in signal transduction across synapses. Although we were able to isolate a fragment of a fusion transcript of both genes from the patient's blood, we were not able to isolate a transcript with an open reading frame throughout the entire length. The reading frame could be restored by differential splicing, which might take place in brain tissue but not in blood. We assume that either haploinsufficiency of GRIA2 or a GLRB/GRIA2 fusion gene leading to a protein with dominant-negative properties is causing the phenotype of the patient.

[Indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons


    Supplemental Content

    Full text links

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Support Center