Volume 136, Issue 1 pp. 73-79

Trinucleotide repeat dynamic mutation identifying susceptibility in familial and sporadic chronic lymphocytic leukaemia

Rebecca L. Auer

Rebecca L. Auer

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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Guillaume Dighiero

Guillaume Dighiero

Unite d'Immuno-hematologie et d'Immunopathologie, Institut Pasteur, Paris, France

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Lynn R. Goldin

Lynn R. Goldin

Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD, USA

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Denise Syndercombe-Court

Denise Syndercombe-Court

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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Christopher Jones

Christopher Jones

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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Suzanne McElwaine

Suzanne McElwaine

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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Adrian C. Newland

Adrian C. Newland

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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Christopher D. Fegan

Christopher D. Fegan

Department of Haematology, Cardiff and Vale NHS Trust, Cardiff, UK

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Neil Caporaso

Neil Caporaso

Division of Cancer Epidemiology and Genetics, National Cancer Institute, NIH, Bethesda, MD, USA

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Finbarr E. Cotter

Finbarr E. Cotter

Centre for Haematology, Institute of Cell and Molecular Science, Bart's & The London Queen Mary School of Medicine, London, UK

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First published: 20 November 2006
Citations: 14
Finbarr E. Cotter, MD, PhD, Centre for Haematology, Institute of Cell and Molecular Science, Barts & The London School of Medicine, 4 Newark Street, London E1 2AT, UK. E-mail: [email protected]

Summary

Chronic lymphocytic leukaemia (CLL) has a strong hereditary component, but an understanding of predisposition genes is poor. Anticipation with familial CLL has been reported, although the molecular mechanism is unknown. Expansion of trinucleotide repeat sequences underlies anticipation observed in neurodegenerative disease. A polymerase chain reaction-based assay was used to analyse the stability of ten CCG- and CAG-trinucleotide repeat tracts in 18 CLL families and 140 patients with the sporadic form of the disease. The study suggests that anticipation, if it occurs in CLL, is not linked to CCG- and CAG-repeat expansion, however, variation in repeat length at certain loci (FRA16A) may permit identification of susceptible family members. In addition, polymorphisms with prognostic significance were identified. These were high length (but not expanded) repeats at FRA11B (P = 0·01), ATXN1 (P = 0·032) and ATXN3 (P = 0·022), all associated with poor risk disease.

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