PMID- 31772329 OWN - NLM STAT- MEDLINE DCOM- 20201124 LR - 20220418 IS - 1476-5594 (Electronic) IS - 0950-9232 (Linking) VI - 39 IP - 9 DP - 2020 Feb TI - Bone marrow dendritic cells support the survival of chronic lymphocytic leukemia cells in a CD84 dependent manner. PG - 1997-2008 LID - 10.1038/s41388-019-1121-y [doi] AB - Chronic lymphocytic leukemia (CLL) is a malignancy of mature B lymphocytes. The microenvironment of the CLL cells is a vital element in the regulation of the survival of these malignant cells. CLL cell longevity is dependent on external signals, originating from cells in their microenvironment including secreted and surface-bound factors. Dendritic cells (DCs) play an important part in tumor microenvironment, but their role in the CLL bone marrow (BM) niche has not been studied. We show here that CLL cells induce accumulation of bone marrow dendritic cells (BMDCs). Depletion of this population attenuates disease expansion. Our results show that the support of the microenvironment is partly dependent on CD84, a cell surface molecule belonging to the Signaling Lymphocyte Activating Molecule (SLAM) family of immunoreceptors. Our results suggest a novel therapeutic strategy whereby eliminating BMDCs or blocking the CD84 expressed on these cells may reduce the tumor load. FAU - Barak, Avital F AU - Barak AF AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Lewinsky, Hadas AU - Lewinsky H AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Perpinial, Michal AU - Perpinial M AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Huber, Victoria AU - Huber V AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Radomir, Lihi AU - Radomir L AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Kramer, Mattias P AU - Kramer MP AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Sever, Lital AU - Sever L AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Wolf, Yochai AU - Wolf Y AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Shapiro, Mika AU - Shapiro M AD - Department of Hematology, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. FAU - Herishanu, Yair AU - Herishanu Y AD - Department of Hematology, Tel-Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. FAU - Jung, Steffen AU - Jung S AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Becker-Herman, Shirly AU - Becker-Herman S AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. FAU - Shachar, Idit AU - Shachar I AD - Department of Immunology, Weizmann Institute of Science, Rehovot, 76100, Israel. idit.shachar@weizmann.ac.il. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20191126 PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (CD84 protein, human) RN - 0 (Signaling Lymphocytic Activation Molecule Family) SB - IM MH - Animals MH - Apoptosis MH - Bone Marrow/immunology/metabolism/*pathology MH - Cell Proliferation MH - Dendritic Cells/immunology/metabolism/*pathology MH - Female MH - Humans MH - Leukemia, Lymphocytic, Chronic, B-Cell/immunology/metabolism/*pathology MH - Mice MH - Mice, Transgenic MH - Prognosis MH - Signaling Lymphocytic Activation Molecule Family/*metabolism MH - Tumor Cells, Cultured MH - Tumor Microenvironment/*immunology EDAT- 2019/11/28 06:00 MHDA- 2020/11/25 06:00 CRDT- 2019/11/28 06:00 PHST- 2019/04/18 00:00 [received] PHST- 2019/11/13 00:00 [accepted] PHST- 2019/11/11 00:00 [revised] PHST- 2019/11/28 06:00 [pubmed] PHST- 2020/11/25 06:00 [medline] PHST- 2019/11/28 06:00 [entrez] AID - 10.1038/s41388-019-1121-y [pii] AID - 10.1038/s41388-019-1121-y [doi] PST - ppublish SO - Oncogene. 2020 Feb;39(9):1997-2008. doi: 10.1038/s41388-019-1121-y. Epub 2019 Nov 26.