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lüll The adventures of Sonic Hedgehog in development and repair I Hedgehog signaling in gastrointestinal development and disease Parkin CA; Ingham PWAm J Physiol Gastrointest Liver Physiol 2008[Feb]; 294 (2): G363-7Hedgehog (Hh) proteins are members of a family of secreted signaling factors that orchestrate the development of many organs and tissues including those of the gastrointestinal (GI) tract. The requirement for Hh activity is not limited to early development but underlies the homeostasis of a number of tissues, and abnormal activity of the Hh pathway is associated with several GI malignancies. Understanding the roles and mechanisms of action of Hh signaling both in development and postnatally should thus give novel insights into potential treatments for these diseases. Here we focus on the Hh signaling pathway and its role in GI tract development and maintenance and consider the diseases resulting from aberrant Hh activity.|Gastrointestinal Diseases/*physiopathology[MESH]|Gastrointestinal Tract/*growth & development[MESH]|Hedgehog Proteins/*physiology[MESH]|Humans[MESH]|Pancreas/growth & development/pathology[MESH]|Pancreatic Neoplasms/pathology[MESH]|Signal Transduction/*physiology[MESH] |