DNA methylation profiles in chronic lymphocytic leukemia patients treated with chemoimmunotherapy

In order to gain insight into the contribution of DNA methylation to disease progression of chronic lymphocytic leukemia (CLL), using 450K Illumina arrays, we determined the DNA methylation profiles in paired pre-treatment/relapse samples from 34 CLL patients treated with chemoimmunotherapy, mostly...

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Veröffentlicht in:Clinical epigenetics 2019-12, Vol.11 (1), p.177-177, Article 177
Hauptverfasser: Tsagiopoulou, Maria, Papakonstantinou, Nikos, Moysiadis, Theodoros, Mansouri, Larry, Ljungström, Viktor, Duran-Ferrer, Martí, Malousi, Andigoni, Queirós, Ana C, Plevova, Karla, Bhoi, Sujata, Kollia, Panagoula, Oscier, David, Anagnostopoulos, Achilles, Trentin, Livio, Ritgen, Matthias, Pospisilova, Sarka, Stavroyianni, Niki, Ghia, Paolo, Martin-Subero, Jose I, Pott, Christiane, Rosenquist, Richard, Stamatopoulos, Kostas
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container_start_page 177
container_title Clinical epigenetics
container_volume 11
creator Tsagiopoulou, Maria
Papakonstantinou, Nikos
Moysiadis, Theodoros
Mansouri, Larry
Ljungström, Viktor
Duran-Ferrer, Martí
Malousi, Andigoni
Queirós, Ana C
Plevova, Karla
Bhoi, Sujata
Kollia, Panagoula
Oscier, David
Anagnostopoulos, Achilles
Trentin, Livio
Ritgen, Matthias
Pospisilova, Sarka
Stavroyianni, Niki
Ghia, Paolo
Martin-Subero, Jose I
Pott, Christiane
Rosenquist, Richard
Stamatopoulos, Kostas
description In order to gain insight into the contribution of DNA methylation to disease progression of chronic lymphocytic leukemia (CLL), using 450K Illumina arrays, we determined the DNA methylation profiles in paired pre-treatment/relapse samples from 34 CLL patients treated with chemoimmunotherapy, mostly (n = 31) with the fludarabine-cyclophosphamide-rituximab (FCR) regimen. The extent of identified changes in CLL cells versus memory B cells from healthy donors was termed "epigenetic burden" (EB) whereas the number of changes between the pre-treatment versus the relapse sample was termed "relapse changes" (RC). Significant (p < 0.05) associations were identified between (i) high EB and short time-to-first-treatment (TTFT); and, (ii) few RCs and short time-to-relapse. Both the EB and the RC clustered in specific genomic regions and chromatin states, including regulatory regions containing binding sites of transcription factors implicated in B cell and CLL biology. Overall, we show that DNA methylation in CLL follows different dynamics in response to chemoimmunotherapy. These epigenetic alterations were linked with specific clinical and biological features.
doi_str_mv 10.1186/s13148-019-0783-1
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subjects Binding sites
Chemoimmunotherapy
Chromatin
Chronic lymphocytic leukemia
CLL
Cyclophosphamide
Deoxyribonucleic acid
DNA
DNA methylation
Epigenetics
Evolution
Fludarabine
Genes
Immunological memory
Lymphatic leukemia
Lymphocytes B
Memory cells
Microarray analysis
Monoclonal antibodies
Patients
Regulatory sequences
Relapse
Rituximab
Targeted cancer therapy
Transcription factors
title DNA methylation profiles in chronic lymphocytic leukemia patients treated with chemoimmunotherapy
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