PRRT2 mutations cause benign familial infantile epilepsy and infantile convulsions with choreoathetosis syndrome.

Am J Hum Genet 2012 Jan;90(1):152-60

Epilepsy Research Program, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, Australia.

Benign familial infantile epilepsy (BFIE) is a self-limited seizure disorder that occurs in infancy and has autosomal-dominant inheritance. We have identified heterozygous mutations in PRRT2, which encodes proline-rich transmembrane protein 2, in 14 of 17 families (82%) affected by BFIE, indicating that PRRT2 mutations are the most frequent cause of this disorder. We also report PRRT2 mutations in five of six (83%) families affected by infantile convulsions and choreoathetosis (ICCA) syndrome, a familial syndrome in which infantile seizures and an adolescent-onset movement disorder, paroxysmal kinesigenic choreoathetosis (PKC), co-occur. These findings show that mutations in PRRT2 cause both epilepsy and a movement disorder. Furthermore, PRRT2 mutations elicit pleiotropy in terms of both age of expression (infancy versus later childhood) and anatomical substrate (cortex versus basal ganglia).

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http://dx.doi.org/10.1016/j.ajhg.2011.12.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3257886PMC
January 2012
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