A multi-national research team that includes a Saint Louis University neurologist has discovered a gene mutation that causes a rare form of Charcot-Marie-Tooth disease, an inherited progressive nerve disorder. The findings are published in an advance online issue of Nature Genetics. Researchers have identified some 50 people from three families who live in St. Louis, Wisconsin, Belgium and Bulgaria and have this form of Charcot-Marie Tooth (CMT) disease, says Florian Thomas, M.D., Ph.D., professor of neurology, molecular virology and molecular microbiology and immunology at Saint Louis University School of Medicine, and associate chief of staff and director of the St. Louis VA Medical Center Spinal Cord Injury/Dysfunction Service.