title: Early onset seizures and Rett-like features associated with mutations in CDKL5.
abstract: Mutations in the CDKL5 gene (also known as STK9) have recently been shown to cause early onset epilepsy and severe mental retardation (ISSX or West syndrome). Patients with CDKL5 mutations sometimes also show features similar to those seen in Rett Syndrome (RTT). We have screened the CDKL5 gene in 94 patients with RTT or a RTT-like phenotype who had tested negative for MECP2 mutations (13 classical RTT female subjects, 25 atypical RTT female subjects, 40 RTT-like female and 16 RTT-like male subjects; 33 of the patients had early onset seizures). Novel pathogenic CDKL5 mutations were identified in three girls, two of whom had initially been diagnosed with the early onset seizure variant of RTT and the other with early onset seizures and some features of RTT. In addition, the 33 patients with early seizures were screened for the most common mutations in the ARX gene but none were found. Combining our three new cases with the previously published cases, 13/14 patients with CDKL5 mutations presented with seizures before the age of 3 months.
authors: Department of Medical Genetics, Cardiff University, Heath Park, Cardiff, UK. evansjc6@cardiff.ac.uk
authors: Julie C
authors: JC
authors: Evans
authors: Hayley L
authors: HL
authors: Archer
authors: James P
authors: JP
authors: Colley
authors: Kirstine
authors: K
authors: Ravn
authors: Jytte Bieber
authors: JB
authors: Nielsen
authors: Alison
authors: A
authors: Kerr
authors: Elizabeth
authors: E
authors: Williams
authors: John
authors: J
authors: Christodoulou
authors: Jozef
authors: J
authors: Gécz
authors: Philip E
authors: PE
authors: Jardine
authors: Michael J
authors: MJ
authors: Wright
authors: Daniela T
authors: DT
authors: Pilz
authors: Lazarus
authors: L
authors: Lazarou
authors: David N
authors: DN
authors: Cooper
authors: Julian R
authors: JR
authors: Sampson
authors: Rachel
authors: R
authors: Butler
authors: Sharon D
authors: SD
authors: Whatley
authors: Angus J
authors: AJ
authors: Clarke
mesh_terms: D002648:Child; D002675:Child, Preschool; D004252:DNA Mutational Analysis; D004827:Epilepsy / Q000235:genetics*; D005260:Female; D018398:Homeodomain Proteins / Q000235:genetics; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D009154:Mutation; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*; D022821:RNA Splice Sites / Q000235:genetics; D015518:Rett Syndrome / Q000235:genetics*; D014157:Transcription Factors / Q000235:genetics
chemical_list: C469264:ARX protein, human; D018398:Homeodomain Proteins; D022821:RNA Splice Sites; D014157:Transcription Factors; D017346:Protein Serine-Threonine Kinases; C114482:CDKL5 protein, human