08/28/2025
Scientists found a plant virus that makes the human body hunt and kill cancer.
And it shrank real tumors.
A plant virus known for infecting beans may hold the key to a breakthrough in cancer treatment. Scientists at the University of California, San Diego, have uncovered why the cowpea mosaic virus (CPMV) uniquely stimulates the human immune system to attack tumors—while closely related viruses do not.
Published in Cell Biomaterials, the study shows that CPMV triggers a powerful dual immune response by activating both innate and adaptive pathways. When injected into tumors in mice, CPMV recruited immune cells to the site, activated long-lasting immune memory, and even shrank untreated tumors elsewhere in the body.
Unlike traditional oncolytic viruses that infect and destroy tumor cells, CPMV works by being recognized as a foreign invader, prompting a robust immune attack.
Researchers discovered that CPMV's RNA stays active longer inside immune cells and activates a critical receptor, TLR7, sparking strong anti-cancer signaling. Closely related plant viruses, like CCMV, fail to produce the same effect. With previous success in both mouse models and canine cancer patients, CPMV now stands out as a promising, non-infectious immunotherapy agent. The team is preparing for clinical trials, hoping this plant pathogen could become a future weapon against cancer.
source
Anthony O. Omole, Hannah S. Newton, Edward Cedrone, Kimia Nematpour, Shaojun Xie, Yongmei Zhao, Bao Tran, Marina A. Dobrovolskaia, Nicole F. Steinmetz. Comparative analyses for plant virus-based cancer immunotherapy drug development. Cell Biomaterials, 2025; 1 (6):Scientists found a plant virus that makes the human body hunt and kill cancer.
And it shrank real tumors.
A plant virus known for infecting beans may hold the key to a breakthrough in cancer treatment. Scientists at the University of California, San Diego, have uncovered why the cowpea mosaic virus (CPMV) uniquely stimulates the human immune system to attack tumors—while closely related viruses do not.
Published in Cell Biomaterials, the study shows that CPMV triggers a powerful dual immune response by activating both innate and adaptive pathways. When injected into tumors in mice, CPMV recruited immune cells to the site, activated long-lasting immune memory, and even shrank untreated tumors elsewhere in the body.
Unlike traditional oncolytic viruses that infect and destroy tumor cells, CPMV works by being recognized as a foreign invader, prompting a robust immune attack.
Researchers discovered that CPMV's RNA stays active longer inside immune cells and activates a critical receptor, TLR7, sparking strong anti-cancer signaling. Closely related plant viruses, like CCMV, fail to produce the same effect. With previous success in both mouse models and canine cancer patients, CPMV now stands out as a promising, non-infectious immunotherapy agent. The team is preparing for clinical trials, hoping this plant pathogen could become a future weapon against cancer.
source
Anthony O. Omole, Hannah S. Newton, Edward Cedrone, Kimia Nematpour, Shaojun Xie, Yongmei Zhao, Bao Tran, Marina A. Dobrovolskaia, Nicole F. Steinmetz. Comparative analyses for plant virus-based cancer immunotherapy drug development. Cell Biomaterials, 2025; 1 (6):