PMID- 35980743 OWN - NLM STAT- MEDLINE DCOM- 20220909 LR - 20221009 IS - 2379-3708 (Electronic) IS - 2379-3708 (Linking) VI - 7 IP - 17 DP - 2022 Sep 8 TI - MCP-1/CCR2 axis inhibition sensitizes the brain microenvironment against melanoma brain metastasis progression. LID - 10.1172/jci.insight.154804 [doi] LID - e154804 AB - Development of resistance to chemo- and immunotherapies often occurs following treatment of melanoma brain metastasis (MBM). The brain microenvironment (BME), particularly astrocytes, cooperate toward MBM progression by upregulating secreted factors, among which we found that monocyte chemoattractant protein-1 (MCP-1) and its receptors, CCR2 and CCR4, were overexpressed in MBM compared with primary lesions. Among other sources of MCP-1 in the brain, we show that melanoma cells altered astrocyte secretome and evoked MCP-1 expression and secretion, which in turn induced CCR2 expression in melanoma cells, enhancing in vitro tumorigenic properties, such as proliferation, migration, and invasion of melanoma cells. In vivo pharmacological blockade of MCP-1 or molecular knockout of CCR2/CCR4 increased the infiltration of cytotoxic CD8+ T cells and attenuated the immunosuppressive phenotype of the BME as shown by decreased infiltration of Tregs and tumor-associated macrophages/microglia in several models of intracranially injected MBM. These in vivo strategies led to decreased MBM outgrowth and prolonged the overall survival of the mice. Our findings highlight the therapeutic potential of inhibiting interactions between BME and melanoma cells for the treatment of this disease. FAU - Pozzi, Sabina AU - Pozzi S AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Scomparin, Anna AU - Scomparin A AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. AD - Department of Drug Science and Technology, University of Turin, Turin, Italy. FAU - Ben-Shushan, Dikla AU - Ben-Shushan D AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Yeini, Eilam AU - Yeini E AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Ofek, Paula AU - Ofek P AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Nahmad, Alessio D AU - Nahmad AD AD - The School of Neurobiology, Biochemistry and Biophysics, The George S. Wise Faculty of Life Sciences, and. AD - Dotan Center for Advanced Therapies, Tel Aviv Sourasky Medical Center (TASMC), Tel Aviv University, Tel Aviv, Israel. FAU - Soffer, Shelly AU - Soffer S AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Ionescu, Ariel AU - Ionescu A AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Ruggiero, Antonella AU - Ruggiero A AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Barzel, Adi AU - Barzel A AD - The School of Neurobiology, Biochemistry and Biophysics, The George S. Wise Faculty of Life Sciences, and. AD - Dotan Center for Advanced Therapies, Tel Aviv Sourasky Medical Center (TASMC), Tel Aviv University, Tel Aviv, Israel. FAU - Brem, Henry AU - Brem H AD - Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA. FAU - Hyde, Thomas M AU - Hyde TM AD - Lieber Institute for Brain Development, Johns Hopkins Medical Campus, Baltimore, Maryland, USA. FAU - Barshack, Iris AU - Barshack I AD - Department of Pathology, Sheba Medical Center, Tel Hashomer, Israel. AD - Department of Pathology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. FAU - Sinha, Sanju AU - Sinha S AD - Cancer Data Science Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA. FAU - Ruppin, Eytan AU - Ruppin E AD - Cancer Data Science Laboratory, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, Maryland, USA. FAU - Weiss, Tomer AU - Weiss T FAU - Madi, Asaf AU - Madi A FAU - Perlson, Eran AU - Perlson E AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. AD - Department of Pathology, Sackler Faculty of Medicine, and. FAU - Slutsky, Inna AU - Slutsky I AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. AD - Department of Pathology, Sackler Faculty of Medicine, and. FAU - Florindo, Helena F AU - Florindo HF AD - Sagol School of Neurosciences, Tel Aviv University, Tel Aviv, Israel. FAU - Satchi-Fainaro, Ronit AU - Satchi-Fainaro R AD - Department of Physiology and Pharmacology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. AD - Department of Pathology, Sackler Faculty of Medicine, and. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20220908 PL - United States TA - JCI Insight JT - JCI insight JID - 101676073 RN - 0 (Ccr2 protein, mouse) RN - 0 (Chemokine CCL2) RN - 0 (Receptors, CCR2) SB - IM MH - Animals MH - Brain/metabolism MH - *Brain Neoplasms/drug therapy/secondary MH - Chemokine CCL2/metabolism MH - *Melanoma/drug therapy/pathology MH - Mice MH - Receptors, CCR2/metabolism MH - Tumor Microenvironment PMC - PMC9536270 OTO - NOTNLM OT - Cancer immunotherapy OT - Oncology OT - Skin cancer OT - Therapeutics COIS- Conflict of interest: HB is a consultant for AsclepiX Therapeutics, Perosphere Inc./AMAG Pharmaceuticals, Inc.; StemGen; InSightec; Accelerating Combination Therapies; Camden Partners; LikeMinds, Inc.; Galen Robotics, Inc.; Nurami Medical; and B*CURED. RSF is on the Board of Directors at Teva Pharmaceutical Industries Ltd. EDAT- 2022/08/19 06:00 MHDA- 2022/09/11 06:00 PMCR- 2022/09/08 CRDT- 2022/08/18 12:02 PHST- 2021/09/08 00:00 [received] PHST- 2022/07/27 00:00 [accepted] PHST- 2022/08/19 06:00 [pubmed] PHST- 2022/09/11 06:00 [medline] PHST- 2022/08/18 12:02 [entrez] PHST- 2022/09/08 00:00 [pmc-release] AID - 154804 [pii] AID - 10.1172/jci.insight.154804 [doi] PST - epublish SO - JCI Insight. 2022 Sep 8;7(17):e154804. doi: 10.1172/jci.insight.154804.