The Elegance of Sonic Hedgehog: Emerging Novel Functions for a Classic Morphogen

Affiliations

• 1 Departments of Biology and Neurobiology and Anatomy, Drexel University, Philadelphia, Pennsylvania, Philadelphia, PA 19146.
• 2 Department of Developmental Neurobiology, Neurobiology and Brain Tumor Program, St. Jude Children's Research Hospital, Memphis, Tennessee, Memphis, TN 38105.
• 3 Center for Neuroscience Research, Children's National Medical Center, Departments of Pediatrics and Pharmacology and Physiology, The George Washington University School of Medicine and Health Sciences, Washington, District of Columbia, Washington, District of Columbia, 20010.
• 4 Centre for Research in Neuroscience, Department of Neurology and Neurosurgery, Brain Repair and Integrative Neuroscience Program, The Research Institute of the McGill University Health Center, Montreal General Hospital, Montreal, Quebec, Canada, H3G 1A4.
• 5 Department of Neurobiology, Harvard Medical School, Boston, Massachusetts, MA 02115 corey_harwell@hms.harvard.edu rebecca.ihrie@vanderbilt.edu.
• 6 Departments of Cell and Developmental Biology and Neurological Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, TN, 37232-6840, and corey_harwell@hms.harvard.edu rebecca.ihrie@vanderbilt.edu.