In Situ Vaccination: A Cancer Treatment a Century in the Making

Injecting immunostimulants directly into the tumor is not a new strategy to stimulate the immune system, but the approach has seen a surge of interest in recent years.

Written byEmma Yasinski
| 6 min read
dendritic cell t cell immunology cancer immunotherapy in situ vaccine

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This past April, Mount Sinai oncologist Joshua Brody and his team announced a clinical trial that delivers immune modulators directly to the tumor environment that stimulate a patient’s immune system to treat several types of cancer. The approach is called in situ vaccination, and it can take many forms such as a virus or targeted radiation. What they all have in common is that they are delivered directly into a tumor to help the immune system recognize and attack the malignancy and then, ideally, other cancer cells that have metastasized throughout the body.

Along with the clinical trial announcement, Brody and his team published preliminary data showing that 8 out of 11 patients with lymphoma saw their treated tumors shrink, and in three patients even distant, untreated tumors dwindled in response to the in situ vaccine. Brody says that although he knew the treatment was “supposed ...

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  • emma yasinski

    Emma is a Florida-based freelance journalist and regular contributor for The Scientist. A graduate of Boston University’s Science and Medical Journalism Master’s Degree program, Emma has been covering microbiology, molecular biology, neuroscience, health, and anything else that makes her wonder since 2016. She studied neuroscience in college, but even before causing a few mishaps and explosions in the chemistry lab, she knew she preferred a career in scientific reporting to one in scientific research.

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