Another trick up the immune system's sleeve: Regrowing blood vessels

Peripheral artery disease, which affects 8.5 million people in the US, can cut off blood flow to the arms and legs, sometimes forcing doctors to amputate limbs. A new approach uses a biomaterial scaffold to recruit the body's own immune T cells to help regrow blood vessels in mice with hindlimb ischemia, supporting immune engineering as a possible treatment for vascular diseases.