Blocking a protein known as CDK7 could prevent heart damage associated with a commonly used cancer chemotherapy medication, according to a new study. Importantly, the researchers also found that inhibiting CDK7 could help enhance the medication’s cancer-killing capability. Based on an animal model, the study findings could provide a foundation for future treatment strategies to reduce chemotherapy-related heart toxicity and increase treatment effectiveness. This could ultimately help increase the lifespan of people with cancer.