Yee Hoon Foong, Qi Wang, Matthew Kearney, Hortense Le, Hua Guo, Diane Chen, Michelle Garlin Politis, Courtney F Connelly, Kevin Kalinsky, Rami S Vanguri, Eileen P Connolly
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Spatial biomarkers of response to eribulin plus pembrolizumab in patients with metastatic triple negative breast cancer in the ENHANCE-1 trial.
ENHANCE-1 was a phase Ib/II study which evaluated eribulin plus pembrolizumab as a treatment for metastatic triple negative breast cancer (mTNBC). All patients had measurable disease and up to 2 prior systemic treatments. We identified 142 patients with available samples and evaluated associations between the pre-treatment tumor-immune microenvironment and response using diagnostic H&Es and multiplexed immunofluorescence with 2 antibody panels. Markers were chosen to evaluate lymphocytes and myeloid cells including: CD4, CD8, FoxP3, CD56, CD20, CD68, CD163, Vimentin, and HLA-DR. While H&E-assessed computational and manual assessments of stromal tumor infiltrating lymphocytes (sTILs) did not associate with response, multiplex immunofluorescence revealed several significant associations. These include enrichment of stromal CD56+ in non-responders and higher stromal CD4 + CD8+ in non-responders in breast samples. Responders exhibited higher stromal macrophage populations CD68 + , CD68+Vimentin + , CD68 + CD163+Vimentin+ as well as higher stromal HLA-DR + . Our results suggest that further studies on immune cell populations other than T-cells as predictive biomarkers for combination therapies in mTNBC are warranted.
期刊介绍：
npj Breast Cancer publishes original research articles, reviews, brief correspondence, meeting reports, editorial summaries and hypothesis generating observations which could be unexplained or preliminary findings from experiments, novel ideas, or the framing of new questions that need to be solved. Featured topics of the journal include imaging, immunotherapy, molecular classification of disease, mechanism-based therapies largely targeting signal transduction pathways, carcinogenesis including hereditary susceptibility and molecular epidemiology, survivorship issues including long-term toxicities of treatment and secondary neoplasm occurrence, the biophysics of cancer, mechanisms of metastasis and their perturbation, and studies of the tumor microenvironment.
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