Scientists at the Washington University School of Medicine in St. Louis have found that a protein that helps brain development in infants and children may also help the brain repair damage done by multiple sclerosis (MS) and other neurological diseases. In a study of mice, the researchers found that the protein CXCR4 is a key component to repairing myelin, a protective sheath that covers nerve cells. The scientists say their finding could mean that the brain may be capable of healing damage...