Researchers from Johns Hopkins University have identified three subtypes of senescent skin cells with distinct shapes, biomarkers, and functions—an advance that could equip scientists with the ability to target and kill the harmful types while leaving the helpful ones intact. 

Scientists at Northwestern University and University of California San Diego have developed a new, potent injectable therapy that can protect the heart from damage after a heart attack. After showing success in cell culture, the scientists tested their new therapy in a rat model of heart attack. Following a single, low-dose intravenous injection, the animals experienced decreased inflammation and cell death along with improved cardiac function and increased growth of new blood vessels.