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MED27 variansts cause Developmental Delay, Dystonia, and Cerebellar Hypoplasia


Abstract

The Mediator multiprotein complex functions as a regulator of RNA polymerase II-catalyzed gene transcription. In this study, exome sequencing (ES) detected biallelic putative disease-causing variants in MED27, encoding Mediator Complex Subunit 27, in sixteen patients from eleven 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. This article is protected by copyright. All rights reserved.

Abstract

The Mediator multiprotein complex functions as a regulator of RNA polymerase II-catalyzed gene transcription. In this study, exome sequencing (ES) detected biallelic putative disease-causing variants in MED27, encoding Mediator Complex Subunit 27, in sixteen patients from eleven 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. This article is protected by copyright. All rights reserved.

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Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Medical Genetics
04 Faculty of Medicine > University Children's Hospital Zurich > Medical Clinic
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Scopus Subject Areas:Life Sciences > Neurology
Health Sciences > Neurology (clinical)
Language:English
Date:1 April 2021
Deposited On:20 Jan 2021 13:29
Last Modified:27 Jan 2022 09:30
Publisher:Wiley-Blackwell Publishing, Inc.
ISSN:0364-5134
OA Status:Green
Publisher DOI:https://doi.org/10.1002/ana.26019
PubMed ID:33443317

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