GATA Factor-Dependent Positive-Feedback Circuit in Acute Myeloid Leukemia Cells.
GATA Factor-Dependent Positive-Feedback Circuit in Acute Myeloid Leukemia Cells.
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急性髓样白血病细胞中的GATA因子依赖性阳性反馈回路。
DOI:
10.1016/j.celrep.2016.07.058
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发表时间:
2016-08-30
期刊:
影响因子:
8.8
通讯作者:
Bresnick EH
中科院分区:
文献类型:
--
作者:
Katsumura KR;Ong IM;DeVilbiss AW;Sanalkumar R;Bresnick EH
The master regulatory transcription factor GATA-2 triggers hematopoietic stem and progenitor cell generation. GATA2 haploinsufficiency is implicated in myelodysplastic syndrome (MDS) and acute myeloid leukemia (AML), and GATA2 overexpression portends a poor prognosis for AML. However, the constituents of the GATA-2-dependent genetic network mediating pathogenesis are unknown. We described a p38-dependent mechanism that phosphorylates GATA-2 and increases GATA-2 target gene activation. We demonstrate that this mechanism establishes a growth-promoting chemokine/cytokine circuit in AML cells. p38/ERK-dependent GATA-2 phosphorylation facilitated positive autoregulation of GATA2 transcription and expression of target genes, including IL1B and CXCL2. IL-1β and CXCL2 enhanced GATA-2 phosphorylation, which increased GATA-2-mediated transcriptional activation. p38/ERK-GATA-2 stimulated AML cell proliferation via CXCL2 induction. As GATA2 mRNA correlated with IL1B and CXCL2 mRNAs in AML-M5 and high expression of these genes predicted poor prognosis of cyto-genetically normal AML, we propose that the circuit is functionally important in specific AML contexts. Katsumura et al. uncover a signaling mechanism that amplifies GATA-2 activity at select target genes in acute myeloid leukemia cells. Expression of GATA-2 target genes encoding the chemokine CXCL2 and cytokine IL-1β correlates with GATA-2 expression in a subtype of human AML, and high GATA-2/CXCL2 expression predicts poor prognosis.
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影响因子:
14.9
作者:
Bresnick EH;Katsumura KR;Lee HY;Johnson KD;Perkins AS
通讯作者:
Perkins AS
DOI:
10.1073/pnas.1422749112
发表时间:
2015-08-25
影响因子:
11.1
作者:
Agerstam, Helena;Karlsson, Christine;Fioretos, Thoas
通讯作者:
Fioretos, Thoas
影响因子:
64.5
作者:
Groeschel, Stefan;Sanders, Mathijs A.;Delwel, Ruud
通讯作者:
Delwel, Ruud
影响因子:
11.4
作者:
Goemans, BF;Zwaan, CM;Heinrich, MC
通讯作者:
Heinrich, MC
影响因子:
20.3
作者:
Beck, Dominik;Thoms, Julie A. I.;Pimanda, John E.
通讯作者:
Pimanda, John E.