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flag A preventive cancer vaccine stopped advanced cancer in all 45 Lynch syndrome carriers in a trial, with one man, Kevin Heyink, remaining cancer-free.

flag Kevin Heyink, a 48-year-old Ontario police officer, is the only man in his family free of cancer after participating in a phase 1b/2 clinical trial for a preventive cancer vaccine targeting Lynch syndrome, a genetic condition that greatly increases the risk of colorectal, endometrial, and other cancers. flag The vaccine, developed by Nouscom and tested at MD Anderson Cancer Center, uses a modified adenovirus to train the immune system to target abnormal proteins linked to the syndrome. flag Of 45 healthy Lynch syndrome carriers in the trial, all tolerated the vaccine safely, showed lasting immune responses, developed fewer precancerous lesions, and none developed advanced cancer. flag Results published in Nature Medicine highlight the vaccine’s potential as a preventive tool for inherited cancer risks, offering hope for reducing early-onset cancers in high-risk individuals.

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