CSF1R Inhibition with Chemotherapy Relieves Systemic Immune Suppression in Patients with Metastatic Triple-Negative Breast Cancer and Boosts anti-PD-1 Efficacy in Transgenic Mammary Tumors

These clinical and preclinical findings provide rationale for therapies to increase therapeutic index of aPD-1 therapy by diminishing presence of T cell-suppressive myelomonocytic cells to improve outcomes for patients with refractory disease.