[PDF] EZH2 in normal hematopoiesis and hematological malignancies





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EZH2 in normal hematopoiesis and hematological malignancies www.impactjournals.com/oncotarget/ Oncotarget, Vol. 7, No. 3 EZH2 in normal hematopoiesis and hematological malignancies

Laurie Herviou

2 , Giacomo Cavalli 2 , Guillaume Cartron 3,4 , Bernard Klein 1,2,3 and

Jérôme Moreaux

1,2,3 1 2 3 4

Correspondence to

: Jérôme Moreaux, email : jerome.moreaux@igh.cnrs.fr

Keywords

: hematological malignancies, EZH2, Polycomb complex, therapeutic target

Received

: August 07, 2015 Accepted: October 14, 2015 Published: October 20, 2015 This is an open-access article distributed under the terms of the Creati ve Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original auth or and source are credited. Abstr A ct Enhancer of zeste homolog 2 (EZH2), the catalytic subunit of the Polycomb repressive complex 2, inhibits gene expression through methylation on lysine 27 of histone H3. EZH2 regulates normal hematopoietic stem cell self-renewal and differentiation. EZH2 also controls normal B cell differentiation. EZH2 deregulation has

small molecules have been recently developed to exploit the oncogenic addiction of tumor cells to EZH2. Their therapeutic potential is currently under evaluation.

This review summarizes the roles of EZH2 in normal and pathologic hematological processes and recent advances in the development of EZH2 inhibitors for the personalized treatment of patients with hematological malignancies.

Physiologic

A l functions of EZ h 2 EZ h

2 and Polycomb complex-mediated

transcription repression r oles of EZ h

2 in normal hematopoiesis

CDKN2A

ID2 SOX7

NOXAp21WIG1

f igure 1: Polycomb complex-mediated transcription repression. EZ H 2 A ND H E M

ATOLOGICAL

M A LIGN A NCI E S I ncreased EZ H

2 expression

EZh2 EZh2 EZh2 EZh2 EZh2 EZh2 EZh2 F igure 2: EZ H

2 mutations in hematological malignancies.

EZH2 EZH2 EZH2

MMSET,

MMSET

MMSET-

EZH2 EZH2 EZH2 F igure 3: EZ H

2 biological functions during normal

B -cell differentiation and lymphomagenesis. EZH2

CDKN2A

CDKN1A

BLIMP1

IRF4 EZH2 EZH2 EZH2 EZH2 EZH2 Ezh2

Evi-1Ntrk3

Ezh2 EZH2 EZH2 EZH2 EZH2 EZH2 c-MYC EZH2

SUZ12EZH2

EZH2 S omatic mutations leading to EZ H

2 gain of

function EZH2 EZH2

MYCBCL2

s omatic mutations leading to EZ h

2 loss of

function HOXA9 RUNX1

Runx1Ezh2

EZH2 SUZ12 EZ h

2 functions not related to

h

3K27 methylation

EZH2 CCND1 EZH2 tA rg E t E d EPigEnEtic thErAPy: EZ h

2 inhibitors

F igure 4: R ole of EZ H

2 deregulation in hematological malignancies.

in vitro EZH2 c onclusion And PErsPEctivEs Ac K nowl E dgm E nts c onflicts of i nt E r E st rE f E r E nc E squotesdbs_dbs33.pdfusesText_39
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