Browsing by Author "Krainc, Dimitri"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Identification of TMEM230 mutations in familial Parkinson's disease
    (Nature Research, 2016-07) Deng, Han-Xiang; Shi, Yong; Yang, Yi; Ahmeti, Kreshnik B.; Miller, Nimrod; Huang, Cao; Cheng, Lijun; Zhai, Hong; Deng, Sheng; Nuytemans, Karen; Corbett, Nicola J.; Kim, Myung Jong; Deng, Hao; Tang, Baisha; Yang, Ziquang; Xu, Yanming; Chen, Piao; Huang, Bo; Gao, Xiao-Ping; Song, Zhi; Liu, Zhenhua; Fecto, Faisal; Siddique, Nailah; Foroud, Tatiana; Jankovic, Joseph; Ghetti, Bernardino; Nicholson, Daniel A.; Krainc, Dimitri; Melen, Onur; Vance, Jeffery M.; Pericak-Vance, Margaret A.; Ma, Yong-Chao; Rajput, Ali H.; Siddique, Teepu; Medical and Molecular Genetics, School of Medicine
    Parkinson's disease is the second most common neurodegenerative disorder without effective treatment. It is generally sporadic with unknown etiology. However, genetic studies of rare familial forms have led to the identification of mutations in several genes, which are linked to typical Parkinson's disease or parkinsonian disorders. The pathogenesis of Parkinson's disease remains largely elusive. Here we report a locus for autosomal dominant, clinically typical and Lewy body-confirmed Parkinson's disease on the short arm of chromosome 20 (20pter-p12) and identify TMEM230 as the disease-causing gene. We show that TMEM230 encodes a transmembrane protein of secretory/recycling vesicles, including synaptic vesicles in neurons. Disease-linked TMEM230 mutants impair synaptic vesicle trafficking. Our data provide genetic evidence that a mutant transmembrane protein of synaptic vesicles in neurons is etiologically linked to Parkinson's disease, with implications for understanding the pathogenic mechanism of Parkinson's disease and for developing rational therapies.
  • Thumbnail Image
    Item
    MED27 Variants Cause Developmental Delay, Dystonia, and Cerebellar Hypoplasia
    (Wiley, 2021) Meng, Linyan; Isohanni, Pirjo; Shao, Yunru; Graham, Brett H.; Hickey, Scott E.; Brooks, Stephanie; Suomalainen, Anu; Joset, Pascal; Steindl, Katharina; Rauch, Anita; Hackenberg, Annette; High, Frances A.; Armstrong-Javors, Amy; Mencacci, Niccolò E.; Gonzàlez-Latapi, Paulina; Kamel, Walaa A.; Al-Hashel, Jasem Y.; Bustos, Bernabé I.; Hernandez, Alejandro V.; Krainc, Dimitri; Lubbe, Steven J.; Van Esch, Hilde; De Luca, Chiara; Ballon, Katleen; Ravelli, Claudia; Burglen, Lydie; Qebibo, Leila; Calame, Daniel G.; Mitani, Tadahiro; Marafi, Dana; Pehlivan, Davut; Saadi, Nebal W.; Sahin, Yavuz; Maroofian, Reza; Efthymiou, Stephanie; Houlden, Henry; Maqbool, Shazia; Rahman, Fatima; Gu, Shen; Posey, Jennifer E.; Lupski, James R.; Hunter, Jill V.; Wangler, Michael F.; Carroll, Christopher J.; Yang, Yaping; Medical and Molecular Genetics, School of Medicine
    The Mediator multiprotein complex functions as a regulator of RNA polymerase II-catalyzed gene transcription. In this study, exome sequencing detected biallelic putative disease-causing variants in MED27, encoding Mediator complex subunit 27, in 16 patients from 11 families with a novel neurodevelopmental syndrome. Patient phenotypes are highly homogeneous, including global developmental delay, intellectual disability, axial hypotonia with distal spasticity, dystonic movements, and cerebellar hypoplasia. Seizures and cataracts were noted in severely affected individuals. Identification of multiple patients with biallelic MED27 variants supports the critical role of MED27 in normal human neural development, particularly for the cerebellum.