17 Jul First Oral Cancer Vaccine Using Bacterial Vector Shows Safety and Immune Response in Metastatic Urothelial Cancer Phase I Trial
MedicalResearch.com Interview with:
Toshiro Shirakawa, MD, PhD
Dean and Professor
Graduate School of Science, Technology and Innovation, Kobe University
Prof. Shirakawa[/caption]
MedicalResearch.com: What is the background for this study? What are the main findings?
Dr. Shirakawa: Immune checkpoint inhibitors have significantly improved the treatment of metastatic urothelial cancer, but many patients eventually develop resistance, leaving limited therapeutic options. We developed B440, a first-in-human oral cancer vaccine using genetically engineered Bifidobacterium longum expressing the WT1 tumor-associated antigen, with the goal of enhancing tumor-specific cellular immunity through the gut immune system.
In this phase I study, B440 demonstrated a favorable safety profile with no dose-limiting toxicities. WT1-specific cellular immune responses were detected in half of the patients, and these patients showed a trend toward longer progression-free survival. As this was a small, single-arm phase I study, these findings should be considered exploratory and hypothesis-generating. For context on how immune checkpoint inhibitors have reshaped the treatment landscape for metastatic urothelial cancer, see this earlier overview of immunotherapy in the treatment of metastatic urothelial cancer.
Dr. Tatum[/caption]
Kristina L. Tatum, PsyD, MS
Instructor
Department of Social and Behavioral Sciences
School of Public Health
A large population-based analysis of more than 841,000 breast cancer patients across the United States examines whether GLP-1 receptor agonist use is associated with improved survival and lower recurrence risk — with findings that researchers describe as very promising.
Dr. Stone[/caption]
Co-author Meredith Stone, PhD
Assistant Director for Cell Therapy Translation
in Dr. Davila’s lab at Roswell Park - presenting author
MedicalResearch.com: What is the background for this study?
Response: While CD19-targeted CAR T cell therapy has garnered clinical success and FDA approval for the treatment of large B cell lymphoma, approximately half of patients suffer from primary resistance or relapse. Increasing evidence suggests that resistance mechanisms are supported by the tumor microenvironment (TME). Cytokines secreted by CAR T cells can remodel the TME, determining the phenotype and function of other immune cells.
Dr. Serena Guo[/caption]
Serena Jingchuan Guo, MD PhD
Assistant Professor
Department of Pharmaceutical Outcomes and Policy
University of Florida College of Pharmacy
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Dr. Hao Dai[/caption]
Hao Dai, PhD
Postdoctoral Fellow
Department of Biostatistics & Health Data Science
Indiana University School of Medicine
MedicalResearch.com: What is the background for this study? What are the main findings?
Response: Obesity and type 2 diabetes are both known to increase the risk of several cancers. Glucagon-like peptide 1 receptor agonists (GLP-1RAs) have become very popular for both glycemic control and weight loss, but their long-term effects on cancer risk are still unclear. Using a large real-world dataset, we emulated a target trial comparing more than 43,000 GLP-1RA users to matched non-users.
We found that GLP-1RA use was associated with a significantly lower overall cancer risk.
Dr. Jiyoung Ahn[/caption]
MedicalResearch.com Interview with:
Jiyoung Ahn, PhD