Ly6Clo monocytes drive immunosuppression and confer resistance to anti-VEGFR2 cancer therapy
| Autor: | Piotr S. Kowalski, Joao Incio, Daniel G. Anderson, Keehoon Jung, Omar F. Khan, Robert Langer, Rakesh K. Jain, Jeffrey W. Clark, Christopher G. Willett, Takahiro Heishi, Euiheon Chung, Dai Fukumura, Andrew D. Luster, Timothy P. Padera, Seok Hyun Yun, Nuh N. Rahbari |
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| Rok vydání: | 2017 |
| Předmět: |
Male
0301 basic medicine Chemokine Intravital Microscopy Neutrophils CX3C Chemokine Receptor 1 Antineoplastic Agents Monocytes Mice 03 medical and health sciences Cell Line Tumor Neoplasms CX3CR1 medicine Animals Antigens Ly Humans RNA Small Interfering CX3CL1 Immunosuppression Therapy Mice Inbred BALB C biology Chemokine CX3CL1 Monocyte Antibodies Monoclonal Kinase insert domain receptor General Medicine Acquired immune system Vascular Endothelial Growth Factor Receptor-2 Up-Regulation 3. Good health Mice Inbred C57BL Vascular endothelial growth factor A 030104 developmental biology medicine.anatomical_structure Drug Resistance Neoplasm CXCL5 Immunology biology.protein Nanoparticles Receptors Chemokine Research Article |
| Zdroj: | Journal of Clinical Investigation. 127:3039-3051 |
| ISSN: | 1558-8238 0021-9738 |
| DOI: | 10.1172/jci93182 |
| Popis: | Current anti-VEGF therapies for colorectal cancer (CRC) provide limited survival benefit, as tumors rapidly develop resistance to these agents. Here, we have uncovered an immunosuppressive role for nonclassical Ly6Clo monocytes that mediates resistance to anti-VEGFR2 treatment. We found that the chemokine CX3CL1 was upregulated in both human and murine tumors following VEGF signaling blockade, resulting in recruitment of CX3CR1+Ly6Clo monocytes into the tumor. We also found that treatment with VEGFA reduced expression of CX3CL1 in endothelial cells in vitro. Intravital microscopy revealed that CX3CR1 is critical for Ly6Clo monocyte transmigration across the endothelium in murine CRC tumors. Moreover, Ly6Clo monocytes recruit Ly6G+ neutrophils via CXCL5 and produce IL-10, which inhibits adaptive immunity. Preventing Ly6Clo monocyte or Ly6G+ neutrophil infiltration into tumors enhanced inhibition of tumor growth with anti-VEGFR2 therapy. Furthermore, a gene therapy using a nanoparticle formulated with an siRNA against CX3CL1 reduced Ly6Clo monocyte recruitment and improved outcome of anti-VEGFR2 therapy in mouse CRCs. Our study unveils an immunosuppressive function of Ly6Clo monocytes that, to our knowledge, has yet to be reported in any context. We also reveal molecular mechanisms underlying antiangiogenic treatment resistance, suggesting potential immunomodulatory strategies to enhance the long-term clinical outcome of anti-VEGF therapies. |
| Databáze: | OpenAIRE |
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