A novel mutation in TARDBP segregates with amyotrophic lateral sclerosis in a large family with early onset and fast progression

Orly Goldstein, Merav Kedmi, Mali Gana-Weisz, Beatrice Nefussy, Batel Vainer, Yaara Fainmesser, Vivian E. Drory, Avi Orr-Urtreger*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To identify the genetic background of ALS segregating in a large Bedouin family in Israel. Methods: Exome sequencing was carried out on three siblings in a family segregating ALS, two affected and one without neurological symptoms. Filtering for causative variants and for modifiers was carried out. Eight variants were confirmed by Sanger sequencing and genotyped on nine available members of the family (three affected and six unaffected). Results: We report the identification of a novel mutation in TARDBP, p.Ala321Asp, segregating in the family. The patients are affected with early onset (average age 34.5, 21–43 years old) and fast progressive disease. The mutation is in exon 6, in the glycin-rich domain, and is predicted to be deleterious. Additional rare, potentially deleterious variants were observed in the three patients, only one of them, PLEKHG5-Phe538Leu, which is located 4.5 Mb upstream to the TARDBP, was also fully segregating in the family. Conclusion: We identified a novel mutation in TARDBP which segregates with the disease in a large family. Additional rare variants were identified, and the combination of next-generation-sequencing together with linkage analysis was optimal to identify causality and modification, emphasizing the importance of combining the two analyses. Burden of deleterious variants may be associated with early age at onset.

Original languageEnglish
Pages (from-to)280-285
Number of pages6
JournalAmyotrophic Lateral Sclerosis and Frontotemporal Degeneration
Volume21
Issue number3-4
DOIs
StatePublished - 2 Apr 2020

Funding

FundersFunder number
Adelis Foundation
Amyotrophic Lateral Sclerosis Association47717
Esther B. Kahn Charitable Foundation

    Keywords

    • TARDBP
    • Whole-exome-sequencing
    • familial ALS

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