September 23, 2021

Peter Adams and Gerald Shadel awarded $13 million from NIH to study aging and liver cancer

Salk News

Peter Adams and Gerald Shadel awarded $13 million from NIH to study aging and liver cancer

LA JOLLA—Sanford Burnham Prebys Professor Peter D. Adams, who directs the Aging, Cancer and Immuno-oncology Program, and Salk Institute Professor Gerald Shadel, who directs the San Diego Nathan Shock Center of Excellence in the Basic Biology of Aging, have been awarded a grant from the NIH’s National Institute on Aging for $13 million, funding a five-year project to explore the connection between aging and liver cancer.

From left: Peter D. Adams and Gerald Shadel.
Credit: (L) Sanford Burnham Prebys; (R) Salk Institute
Click here for a high-resolution image.
Credit: Salk Institute

“If we can understand why the incidence of liver cancer increases with age, that gives us more opportunity for detecting, treating, and preventing it,” says Adams. “We hope that what we learn here can then be extrapolated to other cancers as well.”

Liver cancer is one of the leading causes of cancer death worldwide, killing over 700,000 people per year. And while liver cancer is less common in the United States than in other parts of the world, its incidence has increased over the last several decades. Doctors understand that age is a risk factor for liver cancer, but the precise molecular mechanisms behind this increased risk with age remain a mystery—one that the researchers aim to solve with their new NIH funding.

“We will explore how metabolic, epigenetic, and inflammatory processes conspire during aging to promote liver cancer,” says Shadel, holder of the Audrey Geisel Chair in Biomedical Science. “This integrated approach will help us shed light on how liver cancer is developing over time, and hopefully lead to new therapeutic approaches.”

The team hypothesizes that the biochemical mechanisms at play in age-related liver cancer are directly dependent on interferon signaling, a process in which special proteins in the body signal the presence of viruses or cancer cells.

“Interferon signaling is a normal part of the immune system, but it tends to become chronic in aging people,” says Adams. “Chronic interferon signaling is already known to be associated with several human diseases, and we believe it plays a role in cancer development as well.”

Throughout the five-year project, the researchers will undertake a comprehensive study of how chronic interferon signaling influences several biochemical processes in age-related liver cancer. These include senescence, a cellular stress response associated with aging that is already a major focus of Adams’ research. They’ll also investigate the links between liver cancer and malfunctions of mitochondria and metabolism that occur during aging.

“Mitochondria are commonly known as the ‘powerhouses’ of the cell, but that’s not the only role they play in the body and they get damaged with age,” says Shadel. “My lab focuses on how mitochondria provide stress signals to the rest of the cell during aging and immune responses, so partnering with Adams and others on this project is a natural fit.”

By parsing out the molecular biology of age-related liver cancer, the researchers’ ultimate goal is to investigate approaches to preventing and treating liver cancer by targeting age-related processes, like chronic interferon signaling.

“Liver cancer is on the rise and disease outcomes are poor for patients, particularly older people,” says Adams. “There is a desperate need for better treatment and prevention options, and this project will arm us with the knowledge to develop them.”

In addition to Adams and Shadel, the research team includes Alessandra Sacco from Sanford Burnham Prebys, Susan Kaech and Maxim Shokhirev from the Salk Institute and Gen-Sheng Feng from University of California, San Diego. The grant is titled: Aging as a Risk Factor and Target for Prevention of Liver Cancer (P01 AG070384-01).

About Sanford Burnham Prebys Medical Research Institute
Sanford Burnham Prebys is a preeminent, independent biomedical research institute dedicated to understanding human biology and disease and advancing scientific discoveries to profoundly impact human health. For more than 40 years, our research has produced breakthroughs in cancer, neuroscience, immunology and children’s diseases, and is anchored by our NCI-designated Cancer Center and advanced drug discovery capabilities. For more information, visit us at or on Facebook at and on Twitter @SBPdiscovery.

About the Salk Institute for Biological Studies
Every cure has a starting point. The Salk Institute embodies Jonas Salk’s mission to dare to make dreams into reality. Its internationally renowned and award-winning scientists explore the very foundations of life, seeking new understandings in neuroscience, genetics, immunology and more. The Institute is an independent nonprofit organization and architectural landmark: small by choice, intimate by nature and fearless in the face of any challenge. Be it cancer or Alzheimer’s, aging or diabetes, Salk is where cures begin. Learn more at:

Posted courtesy of Sanford Burnham Prebys.

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