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Flaminia Talos, Stony Brook Medicine
Friday, March 29, 2024, 02:30pm
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Flaminia Talos

Flaminia Talos, MD, PhD

Assistant Professor

Departments of Pathology and Urology

Renaissance School of Medicine at Stony Brook University

 

New Insights into Prostate Cancer Heterogeneity from Mouse Models and Single Cell Transcriptomics

Understanding the role of the immune microenvironment in modulating intratumor heterogeneity is essential for effective cancer therapies. Using multicolor lineage tracing in genetically engineered mouse models and single-cell transcriptomics, we show that slowly progressing tumors contain a multiclonal landscape of relatively homogeneous subpopulations within a well-organized tumor microenvironment. In more advanced and aggressive tumors, however, the multiclonal landscape develops into competing dominant and minor clones accompanied by a disordered microenvironment. We demonstrate that this dominant/minor landscape is associated with differential immunoediting, in which minor clones are marked by an increased expression of IFNγ-response genes and the T cell-activating chemokines Cxcl9 and Cxcl11. Furthermore, immunomodulation of the IFNγ pathway can rescue minor clones from elimination. Notably, the immune-specific gene signature of minor clones exhibits a prognostic value for biochemical recurrence-free survival in human prostate cancer. These findings suggest new immunotherapy approaches for modulating clonal fitness and tumor progression in prostate cancer.

Screenshot 2024 03 12 094838

 

Visit the Talos lab

Host: Gabor Balazsi

Location: Laufer Center Lecture Hall 101

Refreshments following the seminar in room 110

 

Talos Flyer