PURPOSE: Genetic mutations of the cyclin-dependent kinase-like 5 gene (CDKL5) have been reported in patients with epileptic encephalopathy, which is characterized by intractable seizures and severe-to-profound developmental delay. We investigated the clinical relevance of CDKL5 alterations in both genders. METHODS: A total of 125 patients with epileptic encephalopathy were examined for genomic copy number aberrations, and 119 patients with no such aberrations were further examined for CDKL5 mutations. Five patients with Rett syndrome, who did not show methyl CpG-binding protein 2 gene (MECP2) mutations, were also examined for CDKL5 mutations. KEY FINDINGS: One male and three female patients showed submicroscopic deletions including CDKL5, and two male and six female patients showed CDKL5 nucleotide alterations. Development of early onset seizure was a characteristic clinical feature for the patients with CDKL5 alterations in both genders despite polymorphous seizure types, including myoclonic seizures, tonic seizures, and spasms. Severe developmental delays and mild frontal lobe atrophies revealed by brain magnetic resonance imaging (MRI) were observed in almost all patients, and there was no gender difference in phenotypic features. SIGNIFICANCE: We observed that 5% of the male patients and 14% of the female patients with epileptic encephalopathy had CDKL5 alterations. These findings indicate that alterations in CDKL5 are associated with early epileptic encephalopathy in both female and male patients. Wiley Periodicals, Inc.
PURPOSE: Genetic mutations of the cyclin-dependent kinase-like 5 gene (CDKL5) have been reported in patients with epileptic encephalopathy, which is characterized by intractable seizures and severe-to-profound developmental delay. We investigated the clinical relevance of CDKL5 alterations in both genders. METHODS: A total of 125 patients with epileptic encephalopathy were examined for genomic copy number aberrations, and 119 patients with no such aberrations were further examined for CDKL5 mutations. Five patients with Rett syndrome, who did not show methyl CpG-binding protein 2 gene (MECP2) mutations, were also examined for CDKL5 mutations. KEY FINDINGS: One male and three female patients showed submicroscopic deletions including CDKL5, and two male and six female patients showed CDKL5 nucleotide alterations. Development of early onset seizure was a characteristic clinical feature for the patients with CDKL5 alterations in both genders despite polymorphous seizure types, including myoclonic seizures, tonic seizures, and spasms. Severe developmental delays and mild frontal lobe atrophies revealed by brain magnetic resonance imaging (MRI) were observed in almost all patients, and there was no gender difference in phenotypic features. SIGNIFICANCE: We observed that 5% of the male patients and 14% of the female patients with epileptic encephalopathy had CDKL5 alterations. These findings indicate that alterations in CDKL5 are associated with early epileptic encephalopathy in both female and male patients. Wiley Periodicals, Inc.
Authors: Heather E Olson; Scott T Demarest; Elia M Pestana-Knight; Lindsay C Swanson; Sumaiya Iqbal; Dennis Lal; Helen Leonard; J Helen Cross; Orrin Devinsky; Tim A Benke Journal: Pediatr Neurol Date: 2019-02-23 Impact factor: 3.372
Authors: I-Ting Judy Wang; Megan Allen; Darren Goffin; Xinjian Zhu; Andrew H Fairless; Edward S Brodkin; Steve J Siegel; Eric D Marsh; Julie A Blendy; Zhaolan Zhou Journal: Proc Natl Acad Sci U S A Date: 2012-12-10 Impact factor: 11.205
Authors: Heather Olson; Yiping Shen; Jennifer Avallone; Beth R Sheidley; Rebecca Pinsky; Ann M Bergin; Gerard T Berry; Frank H Duffy; Yaman Eksioglu; David J Harris; Fuki M Hisama; Eugenia Ho; Mira Irons; Christina M Jacobsen; Philip James; Sanjeev Kothare; Omar Khwaja; Jonathan Lipton; Tobias Loddenkemper; Jennifer Markowitz; Kiran Maski; J Thomas Megerian; Edward Neilan; Peter C Raffalli; Michael Robbins; Amy Roberts; Eugene Roe; Caitlin Rollins; Mustafa Sahin; Dean Sarco; Alison Schonwald; Sharon E Smith; Janet Soul; Joan M Stoler; Masanori Takeoka; Wen-Han Tan; Alcy R Torres; Peter Tsai; David K Urion; Laura Weissman; Robert Wolff; Bai-Lin Wu; David T Miller; Annapurna Poduri Journal: Ann Neurol Date: 2014-06-13 Impact factor: 10.422
Authors: Ghayda M Mirzaa; Alex R Paciorkowski; Eric D Marsh; Elizabeth M Berry-Kravis; Livija Medne; Asem Alkhateeb; Art Grix; Elaine C Wirrell; Berkley R Powell; Katherine C Nickels; Barbara Burton; Andrea Paras; Katherine Kim; Wendy Chung; William B Dobyns; Soma Das Journal: Pediatr Neurol Date: 2013-05 Impact factor: 3.372
Authors: Charlotte Kilstrup-Nielsen; Laura Rusconi; Paolo La Montanara; Dalila Ciceri; Anna Bergo; Francesco Bedogni; Nicoletta Landsberger Journal: Neural Plast Date: 2012-06-17 Impact factor: 3.599