Gut Fungi Hamper Radiation Therapy in Mice with Cancer

Depleting intestinal fungi allows radiation to effectively fight cancer, likely because the microbes influence the antitumor immune response.

Written byRachael Moeller Gorman
| 3 min read
white and yellow colonies growing on a petri dish

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ABOVE: Colonies of baker's yeast (Saccharomyces cerevisiae)—a common gut fungal community member—and bacteria
© ISTOCK.COM, AKCHAMCZUK

In recent years, researchers have discovered that bacteria in the gut are necessary for robust responses to chemotherapy and immunotherapy, but their effects on radiation therapy remained unknown. Now, research published in Cancer Cell on July 29 demonstrates that not only are gut bacteria vital to radiation’s ability to fight tumors, but fungi—less famous members of the gut microbiome—may act as additional key regulators of the antitumor immune response.

The paper “represents the first demonstration that intestinal fungi may affect anti-cancer radiotherapy,” writes Giorgio Trinchieri, a cancer and immunology researcher at the National Cancer Institute who was not involved with the work, in an email to The Scientist. “I consider this paper an important contribution to the field.”

Researchers know that gut bacteria and fungi affect immune system function, and recent studies have shown that ...

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Meet the Author

  • After earning a bachelor’s degree in biology and neuroscience from Williams College, Rachael spent two years studying the tiny C. elegans worm as a lab tech at Massachusetts General Hospital/Harvard University. She then returned to school to get a master’s degree in environmental studies from Brown University, and subsequently worked as an intern at Scientific AmericanDiscover magazine, and the Annals of Improbable Research, the originators of the yearly Ig Nobel prizes. She now freelances for both scientific and lay publications, and loves telling the stories behind the science. Find her at rachaelgorman.com or on Instagram @rachaelmoellergorman.

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