PMID- 33037771 OWN - NLM STAT- MEDLINE DCOM- 20210618 LR - 20221005 IS - 1582-4934 (Electronic) IS - 1582-1838 (Print) IS - 1582-1838 (Linking) VI - 24 IP - 22 DP - 2020 Nov TI - CSF-1R inhibition disrupts the dialog between leukaemia cells and macrophages and delays leukaemia progression. PG - 13115-13128 LID - 10.1111/jcmm.15916 [doi] AB - Research in the last few years has revealed that leukaemic cells can remodel the bone marrow niche into a permissive environment favouring leukaemic stem cell expansion. Tumour-associated macrophages (TAMs) are prominent components of the tumour microenvironment and play an important role in the onset and progression of solid tumours. However, little is known about their role in the development of acute lymphoblastic leukaemia (ALL). Using a unique mouse model of T-ALL induced by injection of EL4 T-cell lymphoma cells to syngeneic C57BL/6 mice, we report herein that ALL leads to the invasion of leukaemia-associated monocyte-derived cells (LAMs) into the bone marrow and spleen of T-ALL mice. Furthermore, we found that leukaemia cells could polarize bone marrow-derived macrophages (BMDMs) into LAMs. In turn, LAMs were able to protect leukaemia cells from drug-induced apoptosis in vitro. Therapies targeted against the TAMs by inhibiting colony stimulating factor-1 receptor (CSF-1R) have emerged as a promising approach for cancer treatment. In this study, we demonstrate that CSF-1R inhibition inhibits the viability of BMDMs, blocks LAMs polarization and reduces the abundance of LAMs in T-ALL mice. In vivo, combination treatment of CSF-1R inhibitor and vincristine (VCR) dramatically increased the survival of T-ALL mice and delayed leukaemia progression compared with VCR monotherapy. Finally, these data reinforce the role of microenvironments in leukaemia and suggest that macrophages are a potential target for the development of novel therapeutic strategies in T-ALL. CI - (c) 2020 The Authors. Journal of Cellular and Molecular Medicine published by Foundation for Cellular and Molecular Medicine and John Wiley & Sons Ltd. FAU - Li, Kun AU - Li K AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Xu, Wenfu AU - Xu W AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Lu, Ke AU - Lu K AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Wen, Yuxi AU - Wen Y AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Xin, Tianqing AU - Xin T AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Shen, Yaqing AU - Shen Y AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Lv, Xueyan AU - Lv X AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Hu, Shimin AU - Hu S AD - Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA. FAU - Jin, Runming AU - Jin R AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. FAU - Wu, Xiaoyan AU - Wu X AUID- ORCID: 0000-0002-7720-4373 AD - Department of Pediatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20201010 PL - England TA - J Cell Mol Med JT - Journal of cellular and molecular medicine JID - 101083777 RN - 0 (Csf1r protein, mouse) RN - 0 (Receptors, Granulocyte-Macrophage Colony-Stimulating Factor) RN - 5J49Q6B70F (Vincristine) SB - IM MH - Animals MH - Apoptosis MH - Cell Line, Tumor MH - Cell Proliferation MH - Disease Progression MH - Female MH - *Gene Expression Regulation, Leukemic MH - Leukemia/*metabolism MH - Macrophages/*metabolism MH - Mice MH - Mice, Inbred C57BL MH - Receptors, Granulocyte-Macrophage Colony-Stimulating Factor/*antagonists & inhibitors/*metabolism MH - Signal Transduction MH - Tumor Microenvironment MH - Vincristine/pharmacology PMC - PMC7701573 OTO - NOTNLM OT - CSF-1R OT - acute lymphoblastic leukaemia OT - tumour-associated macrophage OT - vincristine COIS- None. EDAT- 2020/10/11 06:00 MHDA- 2021/06/22 06:00 PMCR- 2020/11/01 CRDT- 2020/10/10 05:37 PHST- 2020/03/10 00:00 [received] PHST- 2020/09/03 00:00 [revised] PHST- 2020/09/05 00:00 [accepted] PHST- 2020/10/11 06:00 [pubmed] PHST- 2021/06/22 06:00 [medline] PHST- 2020/10/10 05:37 [entrez] PHST- 2020/11/01 00:00 [pmc-release] AID - JCMM15916 [pii] AID - 10.1111/jcmm.15916 [doi] PST - ppublish SO - J Cell Mol Med. 2020 Nov;24(22):13115-13128. doi: 10.1111/jcmm.15916. Epub 2020 Oct 10.