Guillaume Andrieu PhD and Jordan Shafran report research on new mechanisms to develop immunotherapy for triple negative breast cancer

The research team of Andrieu and Shafran, directed by Gerald Denis PhD, in the BU-BMC Cancer Center, has just reported that “BET bromodomain targeting suppresses the PD-1/PD-L1 pathway in triple-negative breast cancer and elicits anti-tumor immune response”, which appeared today in Cell Reports ‘Sneak Peek’

The mechanisms that control the expression of immune inhibitory molecules in diverse cancer types, such as PD-L1, and host immune receptors such as PD-1 on T cells in the tumor microenvironment, are being investigated urgently. New tools to inhibit these checkpoints show great promise to unleash anti-tumor immunity, and results of recent cancer clinical trials are encouraging. Immunotherapy as an exciting and evolving field was recognized on October 1, 2018, with the award of the Nobel Prize in Medicine to Honjo and Allison. On the other hand, clinical cases in which immune therapy approaches fail are poorly understood, and failure is common enough for certain cancer types to have caused widespread frustration in clinical trials. Given the limited therapeutic options available to patients with triple negative breast cancer, new modalities are urgently needed, and promising results from new immunotherapy clinical trials could quickly reshape the treatment of this subtype of breast cancer.

Here, Andrieu, Shafran and Denis show that inhibition of the BET bromodomain protein family can reduce PD-L1 expression in cellular models of triple negative breast cancer. It is also highly innovative and significant that they show these same pathways control PD-1 expression in human primary T cells, which holds out the possibility that multiple relevant cells in the tumor microenvironment could be targeted by these approaches. They are continuing this research, with support from the National Cancer Institute with a new grant, called “BET bromodomain proteins and the immunometabolism of triple negative breast cancer” (R01 CA222170).

American Cancer Society Pilot Grant Awardees 2023

The national chapter of the American Cancer Society (ACS) awarded Boston University a three-year Institutional Research Grant to encourage new investigators by providing pilot funds for cancer research. These funds make it possible for investigators to complete promising new projects and/or pursue novel ideas that will provide preliminary date for future grant applications from other agencies and programs. The BU-BMC Cancer Center is pleased to announce the 4 recipients of the ACS Pilot Grant Awards for the 2023 cycle. Each project will receive $50,000 in funding for a period of one year.

Daniel Dempsey, PhD
Assistant Professor, Dermatology and Pharmacology & Experimental Therapeutics
“Chemical Approaches to Understand Protein Deubiquitination in Cancer”
Ruben Dries, PhD
Assistant Professor, Department of Medicine, Section of Hematology and Medical Oncology
“Dissecting the Spatiotemporal Mechanisms Underlying Breast Cancer Progression”
Erica D. Pratt, PhD
Moorman-Simon Interdisciplinary Career Development Assistant Professor, Biomedical Engineering
“Molecular Profiling of ctDNA in Pancreatic Cancer”
Pawel F. Przytycki, PhD
Assistant Professor, Faculty of Computing & Data Sciences
“Network-based Algorithms for Identifying The Cell-State-Specific Effects of Non-Coding Somatic Mutations”