(Press-News.org) SAN DIEGO – Non-Hispanic Black patients with acute myeloid leukemia (AML) are living longer, now that new therapies are available, according to a study presented by researchers from the University of Pennsylvania Perelman School of Medicine and Penn Medicine’s Abramson Cancer Center at the 65th American Society of Hematology (ASH) Annual Meeting and Exposition (Abstract 955).
In the past, the standard treatment for AML, a cancer that affects the blood and bone marrow, was intensive chemotherapy. Unfortunately, many older patients were ineligible to receive this treatment because the side effects were too harsh, which translated to poor survival. In November 2018, venetoclax, a new targeted therapy drug that’s given in pill form in combination with other medicines, was approved for AML. This marked the beginning of a new “modern era” for AML treatment, where patients who would have been considered too old or too sick for chemotherapy now had access to a viable treatment option.
In this retrospective study, the researchers found that since venetoclax was approved, AML survival has improved, particularly among non-Hispanic Black patients. The predicted two-year overall survival rate (adjusted for age and comorbidities) for non-Hispanic Black patients with AML rose from 28.6 percent to 45.3 percent, mitigating the survival gap compared to non-Hispanic white patients.
The study used a nationwide electronic health record-derived database to compare survival trends of nearly 3,000 adult patients diagnosed with AML between January 2014 and December 2018 to another set of approximately 2,000 patients diagnosed in the modern era of treatment, between January 2019 and October 2022, after ventoclax and other research advances made their way into the clinic.
“Historically, AML has been a very difficult cancer to treat, so we’re encouraged to see outcomes improving, including the narrowing of health disparity gaps for the first time,” said first author Xin Wang, MD, a third-year fellow in Hematology-Oncology at Penn. “Racial and ethnic disparities in cancer care are complex, but our study shows that when novel therapies are brought into the ‘real-world’ setting, including community hospitals, we can move the needle. On the clinical research side, we need to take advantage of these opportunities to better serve previously under-represented, under-studied populations.”
The researchers set out to learn more about existing racial/ethnic disparities in AML and to assess whether the approval of new low-intensity treatments, including venetoclax–and subsequent shift toward more outpatient and community-based care delivery–had an impact on those disparities. They found that overall survival improved in this modern era of AML treatment, particularly among those age 70 and older. Patients who received treatment were older in the modern era cohort, with a median age of 71 compared to 68.5 in the cohort diagnosed before venetoclax approval. Non-Hispanic white patients saw a more modest improvement in overall survival, while survival did not improve for Hispanics in modern AML care.
“These results are the first step to better understanding racial and ethnic disparities in modern AML care and should be explored further in broad, multi-institutional prospective collaborations,” said co-senior author Kelly Getz, PhD, MPH, an assistant professor of Epidemiology and Pediatrics.
The team’s continued research is focused on assessing how other factors may have impacted overall survival trends. While this study has shed light on the evolving racial/ethnic disparities in AML survival, more studies are needed to better understand why such outsized improvement was seen in non-Hispanic Black patients. The researchers note that this demographic was underrepresented in venetoclax clinical trials, and it’s unclear whether biological features (such as cancer mutations), non-biological factors (such as subsequent therapy and/or access to care), or a combination is responsible for the difference.
“We hope to extend this work with basic science, translational, and qualitative research experts to obtain a more comprehensive view,” said co-senior author Catherine Lai, MD, MPH, an associate professor of Hematology-Oncology and physician leader of Penn Medicine’s Leukemia Clinical Research Unit. “Ultimately, our goal is to further improve the outcomes of all patients with this very challenging disease.”
The study was supported by the National Institutes of Health (1F32MD018944-01) and a Health Equity Research Pilot Award from the Perelman School of Medicine Division of Hematology-Oncology.
Wang will present the findings in an oral abstract session on Monday, Dec. 11 at 4:30 p.m. PT in the Marriott Marquis San Diego Marina Pacific Ballroom Salons 24-26.
Editor’s note: Lai reports consulting for AbbVie, Genentech, Astellas, Rigel, BMS, Daiichi, and Jazz Pharmaceuticals.
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Penn Medicine is one of the world’s leading academic medical centers, dedicated to the related missions of medical education, biomedical research, excellence in patient care, and community service. The organization consists of the University of Pennsylvania Health System and Penn’s Raymond and Ruth Perelman School of Medicine, founded in 1765 as the nation’s first medical school.
The Perelman School of Medicine is consistently among the nation's top recipients of funding from the National Institutes of Health, with $550 million awarded in the 2022 fiscal year. Home to a proud history of “firsts” in medicine, Penn Medicine teams have pioneered discoveries and innovations that have shaped modern medicine, including recent breakthroughs such as CAR T cell therapy for cancer and the mRNA technology used in COVID-19 vaccines.
The University of Pennsylvania Health System’s patient care facilities stretch from the Susquehanna River in Pennsylvania to the New Jersey shore. These include the Hospital of the University of Pennsylvania, Penn Presbyterian Medical Center, Chester County Hospital, Lancaster General Health, Penn Medicine Princeton Health, and Pennsylvania Hospital—the nation’s first hospital, founded in 1751. Additional facilities and enterprises include Good Shepherd Penn Partners, Penn Medicine at Home, Lancaster Behavioral Health Hospital, and Princeton House Behavioral Health, among others.
Penn Medicine is an $11.1 billion enterprise powered by more than 49,000 talented faculty and staff.
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