Identification of Two Novel Mutations in the ATM Gene from Patients with Ataxia-Telangiectasia by Whole Exome Sequencing

Author(s): Masoud Heidari, Morteza Soleyman-Nejad, Mohammad H. Taskhiri, Javad Shahpouri, Alireza Isazadeh, Roghayyeh Ahangari, Ali R. Mohamadi, Masoumeh Ebrahimi, Hadi Karimi, Manzar Bolhassani, Zahra Karimi, Mansour Heidari*

Journal Name: Current Genomics

Volume 20 , Issue 7 , 2019

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Graphical Abstract:


Background: Ataxia telangiectasia (AT) is one of the most common autosomal recessive hereditary ataxia presenting in childhood. The responsible gene for AT designated ATM (AT, mutated) encodes a protein which is involved in cell cycle checkpoints and other responses to genotoxicity. We describe two novel disease-causing mutations in two unrelated Iranian families with Ataxiatelangiectasia.

Methods: The probands including a 6-year-old female and an 18-year-old boy were diagnosed with Ataxia-telangiectasia among two different Iranian families. In this study, Whole-Exome Sequencing (WES) was employed for the detection of genetic changes in probands. The analysis of the cosegregation of the variants with the disease in families was conducted using PCR direct sequencing.

Results: Two novel frameshift mutations, (c.4236_4236del p. Pro1412fs) and (c.8907T>G p. Tyr2969Ter) in the ataxia telangiectasia mutated ATM gene were detected using Whole-Exome Sequencing (WES) in the probands. These mutations were observed in two separate A-T families.

Conclusion: Next-generation sequencing successfully identified the causative mutation in families with ataxia-telangiectasia. These novel mutations in the ATM gene reported in the present study could assist genetic counseling, Preimplantation Genetic Diagnosis (PGD) and prenatal diagnosis (PND) of AT.

Keywords: Ataxia-telangiectasia, mutation detection, whole exome sequencing, protein, probands, frameshift mutations.

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Article Details

Year: 2019
Published on: 01 January, 2020
Page: [531 - 534]
Pages: 4
DOI: 10.2174/1389202920666191107153734
Price: $65

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