The Transition between Telomerase and ALT Mechanisms in Hodgkin Lymphoma and Its Predictive Value in Clinical Outcomes

Cancers
Radhia M'kacherPatrice Carde

Abstract

Background: We analyzed telomere maintenance mechanisms (TMMs) in lymph node samples from HL patients treated with standard therapy. The TMMs correlated with clinical outcomes of patients. Materials and Methods: Lymph node biopsies obtained from 38 HL patients and 24 patients with lymphadenitis were included in this study. Seven HL cell lines were used as in vitro models. Telomerase activity (TA) was assessed by TRAP assay and verified through hTERT immunofluorescence expression; alternative telomere lengthening (ALT) was also assessed, along with EBV status. Results: Both TA and ALT mechanisms were present in HL lymph nodes. Our findings were reproduced in HL cell lines. The highest levels of TA were expressed in CD30-/CD15- cells. Small cells were identified with ALT and TA. Hodgkin and Reed Sternberg cells contained high levels of PML bodies, but had very low hTERT expression. There was a significant correlation between overall survival (p < 10-3), event-free survival (p < 10-4), and freedom from progression (p < 10-3) and the presence of an ALT profile in lymph nodes of EBV+ patients. Conclusion: The presence of both types of TMMs in HL lymph nodes and in HL cell lines has not previously been reported. TMMs correlate with t...Continue Reading

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Citations

Jan 12, 2019·Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia·Helena OlbertovaSarka Pospisilova
Jan 12, 2020·Current Topics in Medicinal Chemistry·Guilherme G da SilvaDiêgo M de Oliveira
May 8, 2020·Journal of Experimental & Clinical Cancer Research : CR·S L GeorgeL Chesler
Mar 7, 2021·International Journal of Molecular Sciences·Elisa MentegariGiovanni Maga

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Methods Mentioned

BETA
proximity ligation assay
fluorescence activation cell sorting
PCR
fluorescence-activated cell sorting
biopsies
ELISA
protein assay
Assay
electrophoresis
FACS

Software Mentioned

MetaSystems
MetaCyte

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