Authors

Document Type

Article

Presentation Date

11-13-2017

Comments

This article has been peer reviewed. It is the authors' final version prior to publication in Cancer Cell, Volume 32, Issue 5, November 2017, Pages 654-668.e5.

The published version is available at https://doi.org/10.1016/j.ccell.2017.10.005. Copyright © Elsevier

CC-BY-NC-ND

Abstract

Tumor-associated macrophages (TAM) contribute to all aspects of tumor progression. Use of CSF1R inhibitors to target TAM is therapeutically appealing, but has had very limited anti-tumor effects. Here, we have identified the mechanism that limited the effect of CSF1R targeted therapy. We demonstrated that carcinoma-associated fibroblasts (CAF) are major sources of chemokines that recruit granulocytes to tumors. CSF1 produced by tumor cells caused HDAC2-mediated downregulation of granulocyte-specific chemokine expression in CAF, which limited migration of these cells to tumors. Treatment with CSF1R inhibitors disrupted this crosstalk and triggered a profound increase in granulocyte recruitment to tumors. Combining CSF1R inhibitor with a CXCR2 antagonist blocked granulocyte infiltration of tumors and showed strong anti-tumor effects.

Language

English

Included in

Oncology Commons

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