A promising new immunotherapy for melanoma is about to start a phase II clinical trial. Called ImmunoPulse, the two-step treatment entails injecting tumors with DNA that encodes an immune system protein called interleukin-12, and then delivering electric shocks to make the tumor cells absorb the DNA. These cells then produce interleukin-12, which boosts the immune response to the tumor. In an early trial of the new treatment on 13 people with melanoma, tumors shrank in all of them and hadn't grown six months later in about half of them. The new trial will test how well this new immunotherapy controls the injected tumors as well as tumors elsewhere in the body, and results are expected in 6 months to a year, says ImmunoPulse developer OncoSec Medical Inc.