Abstract
Ataxia telangiectasia (AT) is an autosomal recessive disorder characterized by cerebellar degeneration, immunodeficiency, oculocutaneous telangiectasias, chromosomal instability, radiosensitivity, and cancer predisposition. The gene mutated in the patients, ATM, encodes a member of the phosphatidylinositol 3-kinase family proteins. The ATM protein has a key role in the cellular response to DNA damage. Truncating and splice site mutations in ATM have been found in most patients with the classical AT phenotype. Here we report of our extensive ATM mutation screening on 25 AT patients from 19 families of different ethnic origin. Previously unknown mutations were identified in six patients including a new homozygous missense mutation, c.8110T>C (p.Cys2704Arg), in a severely affected patient. Comprehensive clinical data are presented for all patients described here along with data on ATM function generated by analysis of cell lines established from a subset of the patients.
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Acknowledgments
We are indebted to the families for their participation in this study. We thank Mrs Susanne Rothe for the excellent technical assistance.
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Ilja Demuth and Véronique Dutrannoy contributed equally to this work.
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Demuth, I., Dutrannoy, V., Marques, W. et al. New mutations in the ATM gene and clinical data of 25 AT patients. Neurogenetics 12, 273–282 (2011). https://doi.org/10.1007/s10048-011-0299-0
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DOI: https://doi.org/10.1007/s10048-011-0299-0