2010
DOI: 10.1038/ng.620
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Somatic mutations of the histone methyltransferase gene EZH2 in myelodysplastic syndromes

Abstract: In myelodysplastic syndromes (MDS), deletions of chromosome 7 or 7q are common and correlate with a poor prognosis. The relevant genes on chromosome 7 are unknown. We report here that EZH2, located at 7q36.1, is frequently targeted in MDS. Analysis of EZH2 deletions, missense and frameshift mutations strongly suggests that EZH2 is a tumor suppressor. As EZH2 functions as a histone methyltransferase, abnormal histone modification may contribute to epigenetic deregulation in MDS.

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Cited by 686 publications
(499 citation statements)
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“…Several studies have described overexpression of EZH2 in human cancers, including prostate and breast cancer, as well as in lymphoma (Varambally et al, 2002;Simon and Lange, 2008). Importantly, while cancer genome sequencing approaches detected inactivating EZH2 mutations in myeloid leukemias (Ernst et al, 2010;Nikoloski et al, 2010), they also uncovered specific heterozygous point mutations of EZH2 in lymphomas (Morin et al, 2010). These point mutations cause an enhanced capacity of EZH2 to di and trimethylate H3K27 (Sneeringer et al, 2010) and could thus drive the establishment of cancerspecific epigenetic programs.…”
Section: Epigenetic Side Effects Of Global Dna Demethylationmentioning
confidence: 99%
“…Several studies have described overexpression of EZH2 in human cancers, including prostate and breast cancer, as well as in lymphoma (Varambally et al, 2002;Simon and Lange, 2008). Importantly, while cancer genome sequencing approaches detected inactivating EZH2 mutations in myeloid leukemias (Ernst et al, 2010;Nikoloski et al, 2010), they also uncovered specific heterozygous point mutations of EZH2 in lymphomas (Morin et al, 2010). These point mutations cause an enhanced capacity of EZH2 to di and trimethylate H3K27 (Sneeringer et al, 2010) and could thus drive the establishment of cancerspecific epigenetic programs.…”
Section: Epigenetic Side Effects Of Global Dna Demethylationmentioning
confidence: 99%
“…We suggest that, in addition to inactivating mutations of catalytic EZH2, [3][4][5] non-catalytic EED mutations exclusively perturb PRC2-mediated epigenetic regulation and substantially contribute to the pathogenesis of MDS and related diseases (Figure 2b). Recently, Score et al 14 reported a set of defective gene mutations of PRC2 constituents, including an EED point mutation, Gly255Asp, in 148 MDS/MPN cases.…”
mentioning
confidence: 99%
“…Dans ces cellules, EZH2 interagit avec les sous-unités RelA/RelB de NF-B, avec pour consé-quence la transcription des gènes cibles, comme les gènes codant le TNF (tumor necrosis factor a) ou l'IL(interleukine)-6, qui, à leur tour, activent de façon constitutive le facteur NF-B, créant ainsi une boucle de rétrocontrôle positive. Dans les cellules ER-positives, EZH2 interagit avec le récepteur des oestrogènes, réprimant ainsi l'expression des gènes cibles de NF-B en induisant la triméthylation de SYNTHÈSE REVUES évidence des mutations inactivatrices somatiques de type « frameshift » (glissement de cadre de lecture), non-sens et faux-sens, tout au long du gène [37]. Enfin, bien qu'elle prévienne sa transformation en LAM (leucémie aiguë myéloblastique), la perte d'activité d'EZH2 participe au développement du syndrome myélodyspla-sique, résultant de mutations de la protéine RUNX (runt related transcription factor 1) [38].…”
Section: Ezh2 : Un Activateur Transcriptionnel Dans Les Cancersunclassified