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Updated: Oct 4, 2025
14:57
Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
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Evolution of TP53 abnormalities during CLL disease course is associated with telomere length changes
Helena Olbertova1,2, Karla Plevova1,2,3, Sarka Pavlova1,2
1Central European Institute of Technology, Masaryk University, 625 00, Brno, Czech Republic.
BMC Cancer
|February 4, 2022
Summary
Telomere length changes in chronic lymphocytic leukemia (CLL) reflect evolving TP53 mutations and are linked to patient age and B-cell receptor signaling. These findings offer new insights into CLL progression and potential therapeutic targets.
Area of Science:
- Hematology
- Molecular Biology
- Genetics
Background:
- Telomeres protect chromosome ends and shorten with age.
- In chronic lymphocytic leukemia (CLL), short telomeres indicate poor prognosis.
- The relationship between clonal evolution and telomere shortening in CLL is not fully understood.
Purpose of the Study:
- To investigate relative telomere length (RTL) dynamics in CLL patients undergoing clonal evolution of TP53 mutations.
- To explore factors influencing clonal evolution and associated telomere length changes.
Main Methods:
- Quantitative PCR (qPCR) was used to measure RTL in 198 CLL patients.
- A subgroup of 26 patients with evolving TP53 mutations (evolTP53) were analyzed in detail.
- Telomerase expression, lymphocyte doubling time, and B-cell receptor (BCR) signaling activity were measured.
Main Results:
- TP53 clonal shifts were linked to changes in RTL, including unexpected lengthening.
- RTL changed in 62% of evolTP53 patients, often moving towards intermediate values.
- Younger patients showed more unstable telomeres; shorter telomeres correlated with decreased BCR signaling activity (p-ERK1/2, p-ZAP-70/SYK, p-NFκB).
Conclusions:
- Changes in telomere length correlate with the evolution of leukemic subclones in CLL.
- Telomere length dynamics are associated with specific clinical and biological features within the CLL cohort.
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