Breast Cancer, Cancer Research, JAMA, Weight Research / 13.05.2026
GLP-1 Medications Associated With Improved Survival and Lower Recurrence Risk in Breast Cancer Patients With Obesity or Diabetes in Observational Study
MedicalResearch.com Interview with:
[caption id="attachment_73639" align="alignleft" width="125"]
Dr. Fuemmeler[/caption]
Bernard F. Fuemmeler, PhD, MPH
Professor and Gordon D. Ginder, MD Chair in Cancer Research
Associate Director of Population Science, Massey Comprehensive Cancer Center
Director of Research, Family Medicine and Population Health
[caption id="attachment_73640" align="alignleft" width="125"]
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.
MedicalResearch.com: What is the background for this study? What are the main findings? Response: Glucagon-like peptide-1 receptor agonists, or GLP-1RAs, have been used since 2005 and as the GLP1RAs treatments and delivery methods have improved, their use has markedly increased. Now it is estimated that nearly 1 in 8 US adults report ever using a GLP-1RA, which includes many people who are using them to treat obesity, diabetes, heart disease, and sleep apnea. There has been some preclinical data from mouse models to suggest that maybe GLP1RAs have an anticancer effect reducing the effects of obesity on tumor growth or progression. We were interested to understand to what extent GLP1RA use among cancer patients might be associated with cancer outcomes, like length of survival after cancer treatment or the chance of recurrence. In our large population-based study using an aggregate of de-identified electronic health record data from more than 841,000 patients with breast cancer across the US, we found that GLP-1 RAs use was associated with significantly improved survival and lower recurrence risk among patients with obesity or type 2 diabetes. Among patients with obesity, GLP-1 RAs use was associated with approximately 65% lower risk of death and a 56% lower risk of recurrence over 10 years compared with nonuse. We also observed substantially improved outcomes among patients with type 2 diabetes compared with insulin or metformin.
Dr. Fuemmeler[/caption]
Bernard F. Fuemmeler, PhD, MPH
Professor and Gordon D. Ginder, MD Chair in Cancer Research
Associate Director of Population Science, Massey Comprehensive Cancer Center
Director of Research, Family Medicine and Population Health
[caption id="attachment_73640" align="alignleft" width="125"]
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.
MedicalResearch.com: What is the background for this study? What are the main findings? Response: Glucagon-like peptide-1 receptor agonists, or GLP-1RAs, have been used since 2005 and as the GLP1RAs treatments and delivery methods have improved, their use has markedly increased. Now it is estimated that nearly 1 in 8 US adults report ever using a GLP-1RA, which includes many people who are using them to treat obesity, diabetes, heart disease, and sleep apnea. There has been some preclinical data from mouse models to suggest that maybe GLP1RAs have an anticancer effect reducing the effects of obesity on tumor growth or progression. We were interested to understand to what extent GLP1RA use among cancer patients might be associated with cancer outcomes, like length of survival after cancer treatment or the chance of recurrence. In our large population-based study using an aggregate of de-identified electronic health record data from more than 841,000 patients with breast cancer across the US, we found that GLP-1 RAs use was associated with significantly improved survival and lower recurrence risk among patients with obesity or type 2 diabetes. Among patients with obesity, GLP-1 RAs use was associated with approximately 65% lower risk of death and a 56% lower risk of recurrence over 10 years compared with nonuse. We also observed substantially improved outcomes among patients with type 2 diabetes compared with insulin or metformin.
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
[caption id="attachment_71231" align="alignleft" width="125"]
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
Dr. Campanella[/caption]
Gabriele Campanella, PhD
Assistant Professor
Windreich Department of Artificial Intelligence and Human Health
Icahn School of Medicine at Mount Sinai
MedicalResearch.com: What is the background for this study?
Response: Lung cancer is the most lethal cancer in the US. Lung adenocarcinoma (LUAD) is the most common form of lung cancer with an incidence of over 100k per year in the US. EGFR mutations are common driver mutations in LUAD, and importantly, these mutations can be targeted by TKI therapy, which has high response rates. Because of this, EGFR testing via NGS (Next Generation Sequencing) is considered mandatory by guidelines for any LUAD diagnosis.
In high-resource settings, rapid EGFR testing is done while waiting for confirmation via NGS. This is because NGS takes about 2 weeks on average, while the rapid testing has a median TAT of 2 days. Early treatment decisions could be made based on the rapid test results. Rapid tests have some important drawbacks, most notably, it exhausts tissue. In lung cancer, tissue is scarce in the first place, and up to 25% of cases, after rapid testing there is not enough tissue for NGS. In those circumstances, patients have to be biopsied again, which adds unnecessary risk for the patient. Even worse, in some cases, the NGS is never done. A non-tissue-exhaustive computational biomarker could be used instead of the tissue-based rapid test.