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Genetic Investigation of Consanguineous Pakistani Families Segregating Rare Spinocerebellar Disorders

Saadi, Saadia Maryam; Cali, Elisa; Khalid, Lubaba Bintee; Yousaf, Hammad; Zafar, Ghazala; Khan, Haq Nawaz; Sher, Muhammad; ... Iqbal, Zafar; + view all (2023) Genetic Investigation of Consanguineous Pakistani Families Segregating Rare Spinocerebellar Disorders. Genes , 14 (7) , Article 1404. 10.3390/genes14071404. Green open access

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Abstract

Spinocerebellar disorders are a vast group of rare neurogenetic conditions, generally characterized by overlapping clinical symptoms including progressive cerebellar ataxia, spastic paraparesis, cognitive deficiencies, skeletal/muscular and ocular abnormalities. The objective of the present study is to identify the underlying genetic causes of the rare spinocerebellar disorders in the Pakistani population. Herein, nine consanguineous families presenting different spinocerebellar phenotypes have been investigated using whole exome sequencing. Sanger sequencing was performed for segregation analysis in all the available individuals of each family. The molecular analysis of these families identified six novel pathogenic/likely pathogenic variants; ZFYVE26: c.1093del, SACS: c.1201C>T, BICD2: c.2156A>T, ALS2: c.2171-3T>G, ALS2: c.3145T>A, and B4GALNT1: c.334_335dup, and three already reported pathogenic variants; FA2H: c.159_176del, APTX: c.689T>G, and SETX: c.5308_5311del. The clinical features of all patients in each family are concurrent with the already reported cases. Hence, the current study expands the mutation spectrum of rare spinocerebellar disorders and implies the usefulness of next-generation sequencing in combination with clinical investigation for better diagnosis of these overlapping phenotypes.

Type: Article
Title: Genetic Investigation of Consanguineous Pakistani Families Segregating Rare Spinocerebellar Disorders
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/genes14071404
Publisher version: https://doi.org/10.3390/genes14071404
Language: English
Additional information: © 2023 by the Authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
Keywords: spinocerebellar; consanguinity; ataxia; spastic paraplegia; neurological disorders
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > UCL Queen Square Institute of Neurology > Department of Neuromuscular Diseases
URI: https://discovery.ucl.ac.uk/id/eprint/10173948
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