Telomere dysfunction accurately predicts clinical outcome in chronic lymphocytic leukaemia,even in patients with early stage disease |
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Authors: | Thet Thet Lin Kevin Norris Nicole H Heppel Guy Pratt James M Allan David J Allsup James Bailey Lynn Cawkwell Robert Hills Julia W Grimstead Rhiannon E Jones Bethan Britt‐Compton Chris Fegan Chris Pepper |
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Institution: | 1. Cardiff CLL Research Group, Institute of Cancer & Genetics, School of Medicine, Cardiff University, , Cardiff, UK;2. Department of Haematology, Birmingham Heartlands Hospital, , Birmingham, UK;3. CRUK Institute for Cancer Studies, University of Birmingham, , Birmingham, UK;4. Northern Institute for Cancer Research, Newcastle University, , Newcastle‐upon‐Tyne, UK;5. Department of Haematology, Castle Hill Hospital, , Cottingham, UK;6. Hull York Medical School, Castle Hill Hospital, , Cottingham, UK |
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Abstract: | Defining the prognosis of individual cancer sufferers remains a significant clinical challenge. Here we assessed the ability of high‐resolution single telomere length analysis (STELA), combined with an experimentally derived definition of telomere dysfunction, to predict the clinical outcome of patients with chronic lymphocytic leukaemia (CLL). We defined the upper telomere length threshold at which telomere fusions occur and then used the mean of the telomere ‘fusogenic’ range as a prognostic tool. Patients with telomeres within the fusogenic range had a significantly shorter overall survival (P < 0·0001; Hazard ratio HR] = 13·2, 95% confidence interval CI] = 11·6–106·4) and this was preserved in early‐stage disease patients (P < 0·0001, HR=19·3, 95% CI = 17·8–802·5). Indeed, our assay allowed the accurate stratification of Binet stage A patients into those with indolent disease (91% survival at 10 years) and those with poor prognosis (13% survival at 10 years). Furthermore, patients with telomeres above the fusogenic mean showed superior prognosis regardless of their IGHV mutation status or cytogenetic risk group. In keeping with this finding, telomere dysfunction was the dominant variable in multivariate analysis. Taken together, this study provides compelling evidence for the use of high‐resolution telomere length analysis coupled with a definition of telomere dysfunction in the prognostic assessment of CLL. |
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Keywords: | telomere length telomere fusion genomic instability leukaemia neoplasia |
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