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City of Hope researchers discover why taking a mushroom supplement slows or prevents prostate cancer from getting worse

The bidirectional research looks at both laboratory and human clinical trial data, finding that medicinal use of white button mushroom reduces the type of cells that weaken the immune system and allow prostate cancer to spread

City of Hope researchers discover why taking a mushroom supplement slows or prevents prostate cancer from getting worse
2024-11-12
(Press-News.org) LOS ANGELES — Researchers at City of Hope®, one of the largest and most advanced cancer research and treatment organizations in the United States, ranked among the nation’s top 5 cancer centers by U.S. News & World Report and a national leader in providing cancer patients with best-in-class, integrated supportive care programs, now understand why taking an investigational white button mushroom supplement shows promise in slowing and even preventing prostate cancer from spreading among men who joined a phase 2 clinical trial studying “food as medicine.” Looking at preclinical and preliminary human data, the City of Hope scientists found that taking white button mushroom pills reduces a class of immune cells called myeloid-derived suppressor cells (MDSCs), which has been linked to cancer development and spread. 

“City of Hope researchers are investigating foods like white button mushroom, grape seed extract, pomegranate, blueberries and ripe purple berries called Jamun for their potential medicinal properties. We’re finding that plant-derived substances may one day be used to support traditional cancer treatment and prevention practices,” said Shiuan Chen, Ph.D., the Lester M. and Irene C. Finkelstein Chair in Biology, professor and chair of the Department of Cancer Biology and Molecular Medicine at Beckman Research Institute of City of Hope, and senior author of the new Clinical and Translational Medicine study. “This study suggests that ‘food as medicine’ treatments could eventually become normal, evidence-based cancer care that is recommended for everyone touched by cancer.” 

The use of naturally derived therapies for cancer treatment — called integrative oncology — is growing in popularity as people become more health conscious and aware of the benefits of whole-person cancer care. Supported by a $100 million gift from Panda Express Co-CEOs Andrew and Peggy Cherng, City of Hope’s Cherng Family Center for Integrative Oncology is accelerating the research, education and clinical care needed to ensure cancer patients and their doctors have access to safe, proven approaches. 

At City of Hope, lab researchers work closely with physicians, allowing for streamlined bidirectional research so that laboratory findings can be taken to patients and what is observed in patients can be taken and put back under the microscope for the development of expedited, more effective cancer treatments. 

In mouse models, researchers found that administration of white button mushroom extract significantly delayed the growth of tumors and extended the survival of mice. It also improved T cell immune response through the reduction of MDSC levels in animal models, meaning it improved the immune system’s ability to kill cancer. 

The researchers profiled blood draws from some of the men participating in City of Hope’s phase 2 clinical trial. The men were under active surveillance as they took white button mushroom supplements. Focusing on eight participants’ samples before and after three months of white button mushroom treatment, the scientists found that there were less tumor-creating MDSCs and more anti-tumor T and natural killer cells, suggesting white button mushroom rebuilds anti-cancer immune defense and slows cancer growth. 

“Our study emphasizes the importance of seeking professional guidance to ensure safety and to avoid self-prescribing supplements without consulting a health care provider,” said Xiaoqiang Wang, M.D., Ph.D., City of Hope staff scientist and first author of the study. “Some people are buying mushroom products or extract online, but these are not FDA-approved. While our research has promising early results, the study is ongoing. That said, it couldn’t hurt if people wanted to add more fresh white button mushrooms to their everyday diet.” 

People interested in joining the National Cancer Institute-funded phase 2 clinical trial should visit https://www.cityofhope.org/research/clinical-trials. City of Hope researchers are now focusing on whether the reduction in MDSCs is associated with improved clinical outcomes in patients with prostate cancer.  

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The Clinical and Translational Medicine study “Reduction of myeloid-derived suppressor cells in prostate cancer murine models and patients following white button mushroom treatment” was supported by a National Institutes of Health grant for City of Hope Core Facilities (P30CA033572), a National Cancer Institute grant to Dr. Chen (CA227230) and a pilot study grant from the Panda Charitable Foundation. 

About City of Hope 
City of Hope's mission is to make hope a reality for all touched by cancer and diabetes. Founded in 1913, City of Hope has grown into one of the largest and most advanced cancer research and treatment organizations in the U.S., and one of the leading research centers for diabetes and other life-threatening illnesses. City of Hope research has been the basis for numerous breakthrough cancer medicines, as well as human synthetic insulin and monoclonal antibodies. With an independent, National Cancer Institute-designated comprehensive cancer center that is ranked top 5 in the nation for cancer care by U.S. News & World Report at its core, City of Hope’s uniquely integrated model spans cancer care, research and development, academics and training, and a broad philanthropy program that powers its work. City of Hope’s growing national system includes its Los Angeles campus, a network of clinical care locations across Southern California, a new cancer center in Orange County, California, and cancer treatment centers and outpatient facilities in the Atlanta, Chicago and Phoenix areas. City of Hope’s affiliated group of organizations includes Translational Genomics Research Institute and AccessHopeTM. For more information about City of Hope, follow us on Facebook, X, YouTube, Instagram and LinkedIn.

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[Press-News.org] City of Hope researchers discover why taking a mushroom supplement slows or prevents prostate cancer from getting worse
The bidirectional research looks at both laboratory and human clinical trial data, finding that medicinal use of white button mushroom reduces the type of cells that weaken the immune system and allow prostate cancer to spread