Short and complex-Telomeres and genomes in CLL

Area of Science:

• Hematology
• Oncology
• Genetics

Background:

• Chronic lymphocytic leukemia (CLL) with complex karyotype (CK) is a high-risk group often resistant to treatment.
• Identifying reliable prognostic markers is crucial for managing CK CLL patients.

Purpose of the Study:

• To investigate the association between telomere length and clinical-genomic features in a cohort of CLL patients.
• To evaluate telomere length as a prognostic biomarker for treatment initiation in CLL, particularly in high-risk subgroups.

Main Methods:

• Analysis of a patient cohort enriched for CK CLL.
• Assessment of telomere length and its correlation with genetic markers like unmutated IGHV, del(11q)/del(17p), and genomic complexity.
• Evaluation of time to first treatment (TTFT) in relation to telomere length.

Main Results:

• Short telomeres were associated with poor-risk characteristics including unmutated IGHV, del(11q)/del(17p), and chromothripsis in CK CLL.
• Shorter telomere length correlated with a reduced TTFT in the overall cohort and specifically in patients with CK or del(17p).
• Telomere length emerged as an independent prognostic factor in multivariable analysis.

Conclusions:

• Telomere length is a significant biomarker associated with adverse prognostic features in CLL.
• Short telomeres are predictive of a shorter time to treatment, supporting their utility in risk stratification for CLL patients.