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Telomere length in poor-risk chronic lymphocytic leukemia: associations with disease characteristics and outcome

Telomere length in chronic lymphocytic leukemia (CLL) is described as an independent prognostic factor based largely on previously untreated patients from chemotherapy based trials. Here, we studied telomere length associations in high-risk, relapsed/refractory CLL treated with alemtuzumab in the CL...

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Bibliographic Details
Main Authors: Steinbrecher, Daniela (Author) , Dreger, Peter (Author)
Format: Article (Journal)
Language:English
Published: 2018
In: Leukemia and lymphoma
Year: 2017, Volume: 59, Issue: 7, Pages: 1614-1623
ISSN:1029-2403
DOI:10.1080/10428194.2017.1390236
Online Access:Verlag, Volltext: http://dx.doi.org/10.1080/10428194.2017.1390236
Verlag, Volltext: https://doi.org/10.1080/10428194.2017.1390236
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Author Notes:Daniela Steinbrecher, Billy Michael Chelliah Jebaraj, Christof Schneider, Jennifer Edelmann, Florence Cymbalista, Véronique Leblond, Alain Delmer, Stefan Ibach, Eugen Tausch, Annika Scheffold, Johannes Bloehdorn, Michael Hallek, Peter Dreger, Hartmut Döhner, Stephan Stilgenbauer
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Summary:Telomere length in chronic lymphocytic leukemia (CLL) is described as an independent prognostic factor based largely on previously untreated patients from chemotherapy based trials. Here, we studied telomere length associations in high-risk, relapsed/refractory CLL treated with alemtuzumab in the CLL2O study (n = 110) of German and French CLL study groups. Telomere length (median 3.28 kb, range 2.52-7.24 kb) was relatively short, since 84.4% of patients had 17p- which is generally associated with short telomeres. Median telomere length was used for dichotomization into short and long telomere subgroups. Telomere length was associated with s-TK (p = .025) and TP53 mutations (p = .050) in untreated patients, while no association with clinical/biological characteristics was observed in relapsed/refractory CLL. Short telomeres had significant association with shorter PFS (p = .018) only in refractory CLL. Presence of short telomeres, loss of genes maintaining genomic integrity (SMC5) and increased incidence of chromothripsis, indicated the prevalence of genomic instability in this high-risk cohort.
Item Description:Published online: 24 Oct 2017
Gesehen am 18.09.2018
Physical Description:Online Resource
ISSN:1029-2403
DOI:10.1080/10428194.2017.1390236

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