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Hemati P, Revah-Politi A, Bassan H, Petrovski S, Bilancia CG, Ramsey K, Griffin NG, Bier L, Cho MT, Rosello M, Lynch SA, Colombo S, Weber A, Haug M, Heinzen EL, Sands TT, Narayanan V, Primiano M, Aggarwal VS, Millan F, Sattler-Holtrop SG, Caro-Llopis A, Pillar N, Baker J, Freedman R, Kroes HY, Sacharow S, Stong N, Lapunzina P, Schneider MC, Mendelsohn NJ, Singleton A, Loik Ramey V, Wou K, Kuzminsky A, Monfort S, Weiss M, Doyle S, Iglesias A, Martinez F, Mckenzie F, Orellana C, van Gassen KLI, Palomares M, Bazak L, Lee A, Bircher A, Basel-Vanagaite L, Hafström M, Houge G, Goldstein DB, Anyane-Yeboa K. Refining the phenotype associated with GNB1 mutations: Clinical data on 18 newly identified patients and review of the literature. Am J Med Genet A 2018; 176:2259-2275. [PMID: 30194818 DOI: 10.1002/ajmg.a.40472] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 06/19/2018] [Accepted: 06/21/2018] [Indexed: 11/05/2022]
Abstract
De novo germline mutations in GNB1 have been associated with a neurodevelopmental phenotype. To date, 28 patients with variants classified as pathogenic have been reported. We add 18 patients with de novo mutations to this cohort, including a patient with mosaicism for a GNB1 mutation who presented with a milder phenotype. Consistent with previous reports, developmental delay in these patients was moderate to severe, and more than half of the patients were non-ambulatory and nonverbal. The most observed substitution affects the p.Ile80 residue encoded in exon 6, with 28% of patients carrying a variant at this residue. Dystonia and growth delay were observed more frequently in patients carrying variants in this residue, suggesting a potential genotype-phenotype correlation. In the new cohort of 18 patients, 50% of males had genitourinary anomalies and 61% of patients had gastrointestinal anomalies, suggesting a possible association of these findings with variants in GNB1. In addition, cutaneous mastocytosis, reported once before in a patient with a GNB1 variant, was observed in three additional patients, providing further evidence for an association to GNB1. We will review clinical and molecular data of these new cases and all previously reported cases to further define the phenotype and establish possible genotype-phenotype correlations.
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Affiliation(s)
- Parisa Hemati
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Anya Revah-Politi
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Haim Bassan
- Pediatric Neurology & Development Center, Assaf Harofe Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Slavé Petrovski
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York.,Department of Medicine, Austin Health and Royal Melbourne Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Colleen G Bilancia
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York
| | - Keri Ramsey
- Center for Rare Childhood Disorders, Translational Genomics Research Institute, Phoenix, Arizona
| | - Nicole G Griffin
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Louise Bier
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | | | - Monica Rosello
- Unidad de Genetica, Hospital Universitario y Politecnico La Fe, Valencia, Spain
| | - Sally Ann Lynch
- Temple Street Children's University Hospital, Dublin, Ireland
| | - Sophie Colombo
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Astrid Weber
- Department of Clinical Genetics, Liverpool Women's Hospital, Liverpool, United Kingdom
| | - Marte Haug
- Department of Medical Genetics, St. Olav's University Hospital, Trondheim, Norway
| | - Erin L Heinzen
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Tristan T Sands
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Vinodh Narayanan
- Center for Rare Childhood Disorders, Translational Genomics Research Institute, Phoenix, Arizona
| | - Michelle Primiano
- Department of Pediatrics, Children's Hospital of New York-Presbyterian, New York, New York
| | - Vimla S Aggarwal
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York.,Department of Pathology and Cell Biology, Columbia University Medical Center, New York, New York
| | | | - Shannon G Sattler-Holtrop
- Carle Physician Group, Urbana, Illinois.,Department of Genetics, Le Bonheur Children's Hospital, Memphis, Tennessee
| | - Alfonso Caro-Llopis
- Unidad de Genetica, Hospital Universitario y Politecnico La Fe, Valencia, Spain
| | - Nir Pillar
- Pediatric Neurology & Development Center, Assaf Harofe Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Janice Baker
- Genomics Medicine Program, Children's Hospitals and Clinics of Minnesota, Minneapolis, Minnesota
| | - Rebecca Freedman
- Genetic Services of Western Australia, Department of Health, Government of Western Australia, Perth, Western Australia, Australia.,School of Paediatrics and Child Health, University of Western Australia, Perth, Western Australia, Australia
| | - Hester Y Kroes
- Department of Genetics, University Medical Center Utrecht, The Netherlands
| | - Stephanie Sacharow
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, Massachusetts
| | - Nick Stong
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Pablo Lapunzina
- INGEMM, Instituto de Genética Médica y Molecular, IdiPAZ, Hospital Universitario la Paz, Universidad Autónoma de Madrid (UAM), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras, CIBERER, ISCIII, Madrid, Spain
| | - Michael C Schneider
- Carle Physician Group, Urbana, Illinois.,Biochemical Genetics, Neurology Division, St Christopher's Hospital for Children, Philadelphia, Pennsylvania
| | - Nancy J Mendelsohn
- Genomics Medicine Program, Children's Hospitals and Clinics of Minnesota, Minneapolis, Minnesota
| | | | - Valerie Loik Ramey
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, Massachusetts
| | - Karen Wou
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center (CUMC), New York, New York
| | - Alla Kuzminsky
- Child development Center, Clalit Health Service, Netanya, Israel
| | - Sandra Monfort
- Unidad de Genetica, Hospital Universitario y Politecnico La Fe, Valencia, Spain
| | - Monica Weiss
- Pediatric Neurology & Development Center, Assaf Harofe Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Samantha Doyle
- Temple Street Children's University Hospital, Dublin, Ireland
| | - Alejandro Iglesias
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center (CUMC), New York, New York
| | - Francisco Martinez
- Unidad de Genetica, Hospital Universitario y Politecnico La Fe, Valencia, Spain
| | - Fiona Mckenzie
- Genetic Services of Western Australia, Department of Health, Government of Western Australia, Perth, Western Australia, Australia.,School of Paediatrics and Child Health, University of Western Australia, Perth, Western Australia, Australia
| | - Carmen Orellana
- Unidad de Genetica, Hospital Universitario y Politecnico La Fe, Valencia, Spain
| | | | - Maria Palomares
- INGEMM, Instituto de Genética Médica y Molecular, IdiPAZ, Hospital Universitario la Paz, Universidad Autónoma de Madrid (UAM), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras, CIBERER, ISCIII, Madrid, Spain
| | - Lily Bazak
- Pediatric Neurology & Development Center, Assaf Harofe Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Andy Lee
- Brentwood Children's Clinic, Brentwood, Tennessee
| | - Ana Bircher
- Inner Vision Women's Ultrasound & Genetics, Nashville, Tennessee
| | - Lina Basel-Vanagaite
- Raphael Recanati Genetics Institute, Rabin Medical Center, Beilinson Campus, Petah Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petah Tikva, Israel.,Felsenstein Medical Research Center, Rabin Medical Center, Petah Tikva, Israel
| | - Maria Hafström
- Department of Pediatrics, St Olav's Hospital, Trondheim, Norway.,Department of Laboratory Medicine, Children's and Women's Health, Norwegian University of Science and Technology, Trondheim, Norway
| | - Gunnar Houge
- Center for Medical Genetics and Molecular Medicine, Haukeland University Hospital, Bergen, Norway
| | -
- Center for Rare Childhood Disorders, Translational Genomics Research Institute, Phoenix, Arizona
| | -
- DDD Study, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | - David B Goldstein
- Institute for Genomic Medicine, Columbia University Medical Center, New York, New York
| | - Kwame Anyane-Yeboa
- Division of Clinical Genetics, Department of Pediatrics, Columbia University Medical Center (CUMC), New York, New York
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