A Recurrent De Novo PACS2 Heterozygous Missense Variant Causes Neonatal-Onset Developmental Epileptic Encephalopathy, Facial Dysmorphism, and Cerebellar Dysgenesis

Heather Olson 1 Nolwenn Jean-Marçais 2, 3 Edward Yang 4 Delphine Héron 5, 6 Katrina Tatton-Brown Paul van der Zwaag 7 Emilia Bijlsma 8 Bryan Krock 9 E. Backer Erik-Jan Kamsteeg Margje Sinnema Margot R.F. Reijnders David Bearden Amber Begtrup 10 Aida Telegrafi 10 Roelineke Lunsing Lydie Burglen 11, 12 Gaetan Lesca 13, 14 Megan Cho 10 Lacey Smith Beth Sheidley Christelle Moufawad El Achkar Phillip Pearl 4 Annapurna Poduri Cara Skraban Jennifer Tarpinian Addie Nesbitt 15 Dietje Fransen van de Putte Claudia A.L. Ruivenkamp 16 Patrick Rump Nicolas Chatron 14, 13 Isabelle Sabatier 17 Julitta de Bellescize 18 Laurent Guibaud 19 David Sweetser Jessica Waxler Klaas Wierenga - Ddd Study Jean Donadieu 20 Vinodh Narayanan Keri Ramsey - C4rcd Research Group Caroline Nava 6, 21 Jean-Baptiste Rivière 22, 3 Antonio Vitobello 22, 3 Frederic Tran Mau-Them 22, 3 Christophe Philippe 22, 3 Ange-Line Bruel 22, 3 Yannis Duffourd 3, 22 Laurel Thomas 23 Stefan Lelieveld 24, 25 Janneke Schuurs-Hoeijmakers 24 Han Brunner 24, 26 Boris Keren 6, 21 Julien Thevenon 2, 3, 22 Laurence Faivre 2, 3, 22 Gary Thomas 27 Christel Thauvin-Robinet 2, 3, 22, *
* Auteur correspondant
1 Department of Neurology, Children's Hospital [Boston]
2 Centre de génétique - Centre de référence des maladies rares, anomalies du développement et syndromes malformatifs (CHU de Dijon)
3 FHU TRANSLAD (CHU de Dijon)
4 Boston Children's Hospital
5 CHU Pitié-Salpêtrière [APHP]
6 Département de Génétique [AP-HP Hôpital Pitié-Salpêtrière]
7 UMCG - University Medical Center Groningen [Groningen]
8 Department of Clinical Genetics (Leiden University Medical Center)
9 CHOP - Children’s Hospital of Philadelphia
10 GeneDx [Gaithersburg, MD, USA]
11 Service de génétique et embryologie médicales [CHU Trousseau]
12 GRC ConCer-LD
13 Service de Génétique [HCL Groupement Hospitalier Est]
14 CRNL - Centre de recherche en neurosciences de Lyon
15 Department of Pathology and Laboratory Medicine [Philadelphia, PA, USA]
16 Department of Clinical Genetics [Leiden, the Netherlands]
17 Service de Neurologie Pédiatrique [CHU Lyon]
18 Département d'Epilepsie, Sommeil et Neurophysiologie Pédiatrique [HCL, Lyon]
19 Service de Radiologie [Hôpital Femme Mère Enfant - HCL]
20 Service d’oncologie hématologie pédiatrique [CHU Trousseau]
21 ICM - Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute
22 Equipe GAD (LNC - U1231)
LNC - Lipides - Nutrition - Cancer [Dijon - U1231]
23 Department of Microbiology and Molecular Genetics ( University of Pittsburgh)
24 Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen
25 Radboud Institute for Molecular Life Sciences [Nijmegen, the Netherlands]
26 Donders Institute for Brain, Cognition and Behaviour
27 University of Pittsburgh Cancer Institute
Abstract : Developmental and epileptic encephalopathies (DEEs) represent a large clinical and genetic heterogeneous group of neurodevelopmental diseases. The identification of pathogenic genetic variants in DEEs remains crucial for deciphering this complex group and for accurately caring for affected individuals (clinical diagnosis, genetic counseling, impacting medical, precision therapy, clinical trials, etc.). Whole-exome sequencing and intensive data sharing identified a recurrent de novo PACS2 heterozygous missense variant in 14 unrelated individuals. Their phenotype was characterized by epilepsy, global developmental delay with or without autism, common cerebellar dysgenesis, and facial dysmorphism. Mixed focal and generalized epilepsy occurred in the neonatal period, controlled with difficulty in the first year, but many improved in early childhood. PACS2 is an important PACS1 paralog and encodes a multifunctional sorting protein involved in nuclear gene expression and pathway traffic regulation. Both proteins harbor cargo(furin)-binding regions (FBRs) that bind cargo proteins, sorting adaptors, and cellular kinase. Compared to the defined PACS1 recurrent variant series, individuals with PACS2 variant have more consistently neonatal/early-infantile-onset epilepsy that can be challenging to control. Cerebellar abnormalities may be similar but PACS2 individuals exhibit a pattern of clear dysgenesis ranging from mild to severe. Functional studies demonstrated that the PACS2 recurrent variant reduces the ability of the predicted autoregulatory domain to modulate the interaction between the PACS2 FBR and client proteins, which may disturb cellular function. These findings support the causality of this recurrent de novo PACS2 heterozygous missense in DEEs with facial dysmorphim and cerebellar dysgenesis.
Keywords : PACS2 cerebellar dysgenesis epilepsy intellectual disability PACS-2
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https://hal-univ-bourgogne.archives-ouvertes.fr/hal-02064909
Contributeur : Lnc - Université de Bourgogne <>
Soumis le : mardi 12 mars 2019 - 11:56:06
Dernière modification le : mercredi 20 novembre 2019 - 02:40:28

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UNIV-BOURGOGNE | SORBONNE-UNIVERSITE | CNRS | HCL | LNC-UMR866 | LNC-GAD | UNIV-ST-ETIENNE | UNIV-LYON1 | ICM | SU-MEDECINE | UDL

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Heather Olson, Nolwenn Jean-Marçais, Edward Yang, Delphine Héron, Katrina Tatton-Brown, et al.. A Recurrent De Novo PACS2 Heterozygous Missense Variant Causes Neonatal-Onset Developmental Epileptic Encephalopathy, Facial Dysmorphism, and Cerebellar Dysgenesis. American Journal of Human Genetics, Elsevier (Cell Press), 2018, 102 (5), pp.995-1007. ⟨10.1016/j.ajhg.2018.03.005⟩. ⟨hal-02064909⟩

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