With a goal of treating worn, arthritic hips without extensive surgery to replace them, scientists have programmed stem cells to grow new cartilage on a 3-D template shaped like the ball of a hip joint. What’s more, using gene therapy, they have activated the new cartilage to release anti-inflammatory molecules to fend off a return of arthritis.

Source: Stem cells engineered to grow cartilage, fight inflammation: Technique uses 3-D weaving to grow a living hip replacement — ScienceDaily