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- W2291897574 abstract "// Bing Z. Carter 1 , Po Yee Mak 1 , Ye Chen 1 , Duncan H. Mak 1 , Hong Mu 1 , Rodrigo Jacamo 1 , Vivian Ruvolo 1 , Stefan T. Arold 2 , John E. Ladbury 3 , Jared K. Burks 1 , Steven Kornblau 1 , Michael Andreeff 1 1 Section of Molecular Hematology and Therapy, Department of Leukemia, The University of Texas MD Anderson Cancer Center, Houston, TX, USA 2 King Abdullah University of Science and Technology (KAUST), Computational Bioscience Research Center, Division of Biological and Environmental Sciences and Engineering, Thuwal, Saudi Arabia 3 Department of Biochemistry and Molecular Biology and Center for Biomolecular Structure and Function, The University of Texas MD Anderson Cancer Center, Houston, TX, USA Correspondence to: Bing Z. Carter, e-mail: bicarter@mdanderson.org Michael Andreeff, e-mail: mandreef@mdanderson.org Keywords: AML, ARC, NFκB, chemoresistance Received: January 08, 2016 Accepted: February 15, 2016 Published: March 04, 2016 ABSTRACT To better understand how the apoptosis repressor with caspase recruitment domain (ARC) protein confers drug resistance in acute myeloid leukemia (AML), we investigated the role of ARC in regulating leukemia-mesenchymal stromal cell (MSC) interactions. In addition to the previously reported effect on AML apoptosis, we have demonstrated that ARC enhances migration and adhesion of leukemia cells to MSCs both in vitro and in a novel human extramedullary bone/bone marrow mouse model. Mechanistic studies revealed that ARC induces IL1β expression in AML cells and increases CCL2, CCL4, and CXCL12 expression in MSCs, both through ARC-mediated activation of NFκB. Expression of these chemokines in MSCs increased by AML cells in an ARC/IL1β-dependent manner; likewise, IL1β expression was elevated when leukemia cells were co-cultured with MSCs. Further, cells from AML patients expressed the receptors for and migrated toward CCL2, CCL4, and CXCL12. Inhibition of IL1β suppressed AML cell migration and sensitized the cells co-cultured with MSCs to chemotherapy. Our results suggest the existence of a complex ARC-regulated circuit that maintains intimate connection of AML with the tumor microenvironment through NFκB/IL1β-regulated chemokine receptor/ligand axes and reciprocal crosstalk resulting in cytoprotection. The data implicate ARC as a promising drug target to potentially sensitize AML cells to chemotherapy." @default.
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- W2291897574 date "2016-03-04" @default.
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- W2291897574 title "Anti-apoptotic ARC protein confers chemoresistance by controlling leukemia-microenvironment interactions through a NFκB/IL1β signaling network" @default.
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- W2291897574 doi "https://doi.org/10.18632/oncotarget.7911" @default.
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