Cited by 105Acute Myeloid Leukemia ResearchChronic Myeloid Leukemia TreatmentsMyeloproliferative Neoplasms: Diagnosis and Treatment

Frequent deletions of JARID2 in leukemic transformation of chronic myeloid malignancies

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Puda, Ana, Milosevic, Jelena D., Berg, Tiina, Klampfl, Thorsten, Harutyunyan, Ashot S., Gisslinger, Bettina, Rumi, Elisa, Pietra, Daniela +12 more·2012·American Journal of Hematology

Abstract

Chronic myeloproliferative neoplasms (MPN) and myelodysplastic syndromes (MDS) have an inherent tendency to progress to acute myeloid leukemia (AML). Using high‐resolution SNP microarrays, we studied a total of 517 MPN and MDS patients in different disease stages, including 77 AML cases with previous history of MPN (N = 46) or MDS (N = 31). Frequent chromosomal deletions of variable sizes were detected, allowing the mapping of putative tumor suppressor genes involved in the leukemic transformation process. We detected frequent deletions on the short arm of chromosome 6 (del6p). The common deleted region on 6p mapped to a 1.1‐Mb region and contained only the JARID2 gene—member of the polycomb repressive complex 2 (PRC2). When we compared the frequency of del6p between chronic and leukemic phase, we observed a strong association of del6p with leukemic transformation (P = 0.0033). Subsequently, analysis of deletion profiles of other PRC2 members revealed frequent losses of genes such as EZH2, AEBP2, and SUZ12; however, the deletions targeting these genes were large. We also identified two patients with homozygous losses of JARID2 and AEBP2. We observed frequent codeletion of AEBP2 and ETV6, and similarly, SUZ12 and NF1. Using next generation exome sequencing of 40 patients, we identified only one somatic mutation in the PRC2 complex member SUZ12. As the frequency of point mutations in PRC2 members was found to be low, deletions were the main type of lesions targeting PRC2 complex members. Our study suggests an essential role of the PRC2 complex in the leukemic transformation of chronic myeloid disorders. Am. J. Hematol. 2012. © 2011 Wiley Periodicals, Inc.

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  • Loss-of-function mutations in other core PRC2 components EED and SUZ12 are seen in T-cell acute lymphoblastic leukaemia and malignant peripheral nerve sheath tumours.

    “Loss-of-function mutations in other core PRC2 components EED and SUZ12 are also seen in T-cell acute lymphoblastic leukaemia and malignant peripheral nerve sheath tumours 153-155 .”

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  1. Green A, Beer P. Somatic mutations of IDH1 and IDH2 in the leukemic trans- formation of myeloproliferative neoplasms. N Engl J Med 2010;362:369-370.

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Authors
Puda, A., Milosevic, J. D., Berg, T., Klampfl, T., Harutyunyan, A. S., Gisslinger, B., Rumi, E., Pietra, D., Malcovati, L., Elena, C., Doubek, M., Steurer, M., Tosic, N., Pavlovic, S., Guglielmelli, P., Pieri, L., Vannucchi, A. M., Gisslinger, H., Cazzola, M., & Kralovics, R.
Affiliations
  • Austrian Academy of Sciences (AT)
  • Medical University of Vienna (AT)
  • University of Pavia (IT)
  • Masaryk University (CZ)
  • Innsbruck Medical University (AT)
  • University of Florence (IT)
Venue
American Journal of Hematology
Publisher
Wiley
Published
2011-12-21
Volume
87
Issue
3
Pages
245-250
ISSN
  • 0361-8609 (ISSN-L)
  • 1096-8652
OpenAlex
W2059130068
Cited by
105
References
45
Citations by year
2026: 2 · 2025: 2 · 2024: 2 · 2023: 5 · 2022: 5 · 2021: 6 · 2020: 3 · 2019: 6 · 2018: 8 · 2017: 6 · 2016: 12 · 2015: 13 · 2014: 11 · 2013: 12 · 2012: 11
FWCI
7.44
Type
journal article
Language
en
Open access
Locations
  • American Journal of Hematology (publishedVersion)
  • PubMed (publishedVersion)
  • Florence Research (University of Florence) (submittedVersion)
  • IMAGINE - Repository of the Institute of molecular genetics and genetic engineering (University of Belgrade) (submittedVersion, cc-by)
Funders
  • MPN Research Foundation
  • Austrian Science Fund
  • Fondazione Cariplo
  • Associazione Italiana per la Ricerca sul Cancro (5X 1000)
  • Regione Lombardia
Topics
  • Health Sciences › Medicine › Hematology › Acute Myeloid Leukemia Research
  • Health Sciences › Medicine › Hematology › Chronic Myeloid Leukemia Treatments
  • Health Sciences › Medicine › Genetics › Myeloproliferative Neoplasms: Diagnosis and Treatment
Keywords
JARID2, leukemic transformation, myeloproliferative neoplasms, myelodysplastic syndrome, acute myeloid leukemia, polycomb repressive complex 2, tumor suppressor, EZH2, AEBP2, SUZ12, ETV6, neurofibromatosis type 1, somatic mutations, chromosomal deletion
MeSH terms
Enhancer of Zeste Homolog 2 Protein, Acute Disease, Aged, Carrier Proteins, Cell Transformation, Neoplastic, Chromosome Aberrations, Chromosome Deletion, Chromosome Mapping, Chromosomes, Human, Pair 6, DNA-Binding Proteins, Female, Genotype, Humans, Leukemia, Myeloid, Male, Myelodysplastic Syndromes, Myeloproliferative Disorders, Neoplasm Proteins, Nerve Tissue Proteins, Nuclear Proteins, Repressor Proteins, Transcription Factors, Genes, Tumor Suppressor, Sequence Analysis, DNA, Disease Progression, Oligonucleotide Array Sequence Analysis, Tumor Suppressor Proteins, Polycomb-Group Proteins, Polycomb Repressive Complex 2

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