Public Release: 

Could aspirin treat breast cancer?

Two Boston hospitals partner to test the impact of aspirin on disease recurrence and longevity

Dana-Farber Cancer Institute

BOSTON - Researchers from Brigham and Women's Hospital (BWH) and Dana-Farber Cancer Institute (DFCI) have received a $10 million Breakthrough Award from the Department of Defense's Office of the Congressionally Directed Medical Research Program to test whether aspirin helps women with breast cancer avoid recurrence and live longer. This is the first ever randomized trial in the United States testing aspirin in the disease, which impacts more than 3 million American women who are living with a breast cancer diagnosis.

The Aspirin for Breast Cancer (ABC) Trial will recruit 3,000 women with Stages II and III breast cancer through The Alliance for Clinical Trials in Oncology (Alliance) which is a national clinical trials network sponsored by the National Cancer Institute (NCI) headquartered at Brigham and Women's Hospital. Half of the women participating in the trial will be randomly assigned to receive aspirin and half to receive a placebo pill.

Previous observational research, where scientists observe peoples' behavior, and correlate that behavior with their health, has found that breast cancer survivors who were regular aspirin users had a 50 percent lower risk of breast cancer recurrence and death compared to those who did not use aspirin. This, along with other promising preclinical research, has led to intense interest among physicians and survivors to explore the therapeutic benefits of aspirin.

"The epidemiological and preclinical evidence* linking aspirin with a positive effect on breast cancer recurrence is very strong, but we need a prospective trial like this one to definitively determine the role of aspirin in the disease," said Michelle Holmes, MD, DrPH, who is an associate professor of Medicine and Epidemiology in the Channing Division of Network Medicine at BWH and one of the Partnering PIs of the trial.

If proven effective, adding aspirin to current chemo- and hormonal therapy may enhance survival. Outside the US, aspirin's low cost ($6/year) would make it a major aid in developing nations unable to access expensive therapies.

"Although chemo- and hormonal therapies have helped women with breast cancer live longer, they are expensive and have many side effects," said Wendy Chen, MD, MPH, a senior physician at the Susan F. Smith Center for Women's Cancers at Dana-Farber and co-investigator. "Women whose tumors are not sensitive to hormones have limited treatment options. The results of this trial, if positive, could have a huge impact on the disease, as we have estimated that that aspirin may save 10,000 lives a year in the U.S. and 75,000 lives in low-income countries."

In the U.S., the pharmaceutical industry plays a significant role in sponsoring cancer treatment, but there has been little industry incentive to fund a large-scale trial using aspirin, which is generic and widely available over-the-counter. However, the Department of Defense Breakthrough Award is a unique mechanism that supports studies like the ABC Trial which would be unlikely to receive funding through traditional sources.

"This trial will be the first of its kind in United States," said Eric Winer, MD, Director of Breast Oncology Program, Professor of Medicine, and Thompson Chair of Breast Cancer Research at Dana-Farber Cancer Institute. "The potential benefits of aspirin in preventing breast recurrence are significant and we look forward to determining if aspirin could augment current therapies. This is a treatment that needs to be evaluated further," emphasized Dr. Winer, who is also a Partnering PI of the grant.

The investigators plan to combine results with a large-scale international trial that is also exploring the role of aspirin in cancer and will allow researchers to analyze whether aspirin's benefit is specific to certain subtypes of breast cancer. Researchers note that although aspirin has some known risks, most notably bleeding, it has been widely and safely used in many trials and in clinical practice to prevent other diseases, such as heart disease and colon cancer.

The Breakthrough Award, which is a unique mechanism for the support of studies which are not a good fit for traditional funding mechanisms, requires involvement of Patient Advocates at all levels of the research review and performance since they play an important role in education around breast cancer prevention and treatment, and often have personal experience with the disease.

"Access to effective and affordable treatment for breast cancer is an issue of global concern. The availability and relative low toxicity of aspirin and its potential to significantly extend survival (and potentially reduce deaths) could affect the lives of millions of patients and their families, "said Carol Matyka, an ABC Trial Patient Advocate.


*Supporting research and publications:

1. Aspirin intake and survival after breast cancer
Journal of Clinical Oncology, Mar 20, 2010

2. Effect of daily aspirin on risk of cancer metastasis: a study of incident cancers during randomised controlled trials.
Lancet, Apr 28, 2012

3. Add-Aspirin Trial,

4. A Cancer Treatment in Your Medicine Cabinet?
The New York Times, May 19, 2014

About Brigham and Women's Hospital

Brigham and Women's Hospital (BWH) is a 793-bed nonprofit teaching affiliate of Harvard Medical School and a founding member of Partners HealthCare. BWH has more than 4.2 million annual patient visits, nearly 46,000 inpatient stays and employs nearly 16,000 people. The Brigham's medical preeminence dates back to 1832, and today that rich history in clinical care is coupled with its national leadership in patient care, quality improvement and patient safety initiatives, and its dedication to research, innovation, community engagement and educating and training the next generation of health care professionals. Through investigation and discovery conducted at its Brigham Research Institute (BRI), BWH is an international leader in basic, clinical and translational research on human diseases, more than 1,000 physician-investigators and renowned biomedical scientists and faculty supported by nearly $600 million in funding. For the last 25 years, BWH ranked second in research funding from the National Institutes of Health (NIH) among independent hospitals. BWH continually pushes the boundaries of medicine, including building on its legacy in transplantation by performing a partial face transplant in 2009 and the nation's first full face transplant in 2011. BWH is also home to major landmark epidemiologic population studies, including the Nurses' and Physicians' Health Studies and the Women's Health Initiative as well as the TIMI Study Group, one of the premier cardiovascular clinical trials groups. For more information, resources and to follow us on social media, please visit BWH's online newsroom.

About Dana-Farber Cancer Institute

Dana-Farber Cancer Institute is a principal teaching affiliate of the Harvard Medical School and is among the leading cancer research and care centers in the United States. It is a founding member of the Dana-Farber/Harvard Cancer Center, designated a Comprehensive Cancer Center by the National Cancer Institute. It provides adult cancer care with Brigham and Women's Hospital as Dana-Farber/Brigham and Women's Cancer Center and pediatric care with Boston Children's Hospital as Dana-Farber/Boston Children's Cancer and Blood Disorders Center. Dana-Farber is the top-ranked cancer center in New England, according to U.S. News & World Report, and one of the largest recipients among independent hospitals of National Cancer Institute and National Institutes of Health grant funding. Follow Dana-Farber on Facebook: and on Twitter: @danafarber

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