DEPDC5 mutations in familial and sporadic focal epilepsy

Tsai, Meng Han and Chan, Chung Kin and Chang, Ying Chao and Yu, Y.T. and Chuang, S.T. and Fan, W.L. and Ling, S.C. and Fu, Ting Ying and Chang, Wen Neng and Liou, Chia Wei and Chuang, Yao Chung and Ng, Ching Ching and Hwang, Daw Yang and Lim, Kheng Seang (2017) DEPDC5 mutations in familial and sporadic focal epilepsy. Clinical Genetics, 92 (4). pp. 397-404. ISSN 0009-9163, DOI

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Background and Aims: Mutations in the disheveled, Egl-10 and pleckstrin domain-containing protein 5 (DEPDC5) gene have emerged as an important cause of various familial focal epilepsy syndromes. However, the significance of DEPDC5 mutations in patients with sporadic focal epilepsy has yet to be characterized. Materials and Methods: We studied a kindred of familial focal epilepsy with variable foci using whole-exome sequencing. We subsequently studied a cohort of 293 patients with focal epilepsy and sequenced all exons of DEPDC5 using targeted resequencing. Results: We reported a Taiwanese family with a novel splice site mutation which affected mRNA splicing and activated the downstream mammalian target of rapamycin (mTOR) pathway. Among patients with focal epilepsies, the majority (220/293) of these patients had sporadic focal epilepsy without malformation of cortical development. Two (0.9%) of these patients had probably pathogenic mutations in the DEPDC5 gene. Discussion and Conclusions: Our finding suggests that DEPDC5 is not only the most common gene for familial focal epilepsy but also could be a significant gene for sporadic focal epilepsy. Since focal epilepsies account for more than 60% of all epilepsies, the effect of mTORC1 inhibitor on patients with focal epilepsy due to DEPDC5 mutations will be an important future direction of research.

Item Type: Article
Uncontrolled Keywords: DEPDC5; familial; focal epilepsy; sporadic
Subjects: Q Science > QH Natural history
R Medicine
Divisions: Faculty of Medicine
Faculty of Science > Institute of Biological Sciences
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 26 Oct 2019 06:58
Last Modified: 26 Oct 2019 06:58

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