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Regulation of Gastrointestinal Mucosal Growth: Colloquium Series in Integrated Systems Physiology

Autor Rao N. Jaladanki, Jian-Ying Wang
en Limba Engleză Paperback – dec 2010
The mammalian gastrointestinal mucosa is a rapidly self-renewing tissue in the body, and its homeostasis is preserved through the strict regulation of epithelial cell proliferation, growth arrest, and apoptosis. The control of the growth of gastrointestinal mucosa is unique and, compared with most other tissue in the body, complex. Mucosal growth is regulated by the same hormones that alter metabolism in other tissues, but the gastrointestinal mucosa also responds to a host of events triggered by the ingestion and presence of food within the digestive tract. These gut hormones and peptides regulate the growth of the exocrine pancreas, gallbladder epithelium, and the mucosa of the oxyntic gland region of the stomach and the small and large intestines. Luminal factors (nutrients or other dietary factors, secretions, and microbes), which occur within the lumen and distribute over a proximal-to-distal gradient, are also crucial for the maintenance of the normal gut mucosal growth and could explain the villous height-crypt depth gradient and variety of adaptations since these factors are diluted, absorbed, and destroyed as they pass down the digestive tract. Recently, intestinal stem cells and polyamines are shown to play an important role in the regulation of gastrointestinal mucosal growth under physiological and various pathological conditions. In this chapter, we highlight key issues and factors that control gastrointestinal mucosal growth, with special emphasis on the mechanisms through which epithelial renewal is regulated by polyamines at the cellular and molecular levels.Table of Contents: Introduction / Intestinal Architecture and Development / Characteristics of Gut Mucosal Growth / Intestinal Stem Cells / Role of GI Hormones on the Gut Mucosal Growth / Peptide Growth Factors in GI Mucosal Growth / Luminal Nutrients and Microbes in Gut Mucosal Growth / Polyamines in the Regulation of Mucosal Growth / Summary and Conclusions / Acknowledgments / References
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Specificații

ISBN-13: 9781615041329
ISBN-10: 161504132X
Pagini: 112
Dimensiuni: 191 x 235 x 6 mm
Greutate: 0.2 kg
Editura: Morgan & Claypool
Seria Colloquium Series in Integrated Systems Physiology


Notă biografică

Cell Biology Group, Department of Surgery, University of Maryland School of Medicine Baltimore Veterans Affairs Medical Center, MD 21201

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The mammalian gastrointestinal mucosa is a rapidly self-renewing tissue in the body, and its homeostasis is preserved through the strict regulation of epithelial cell proliferation, growth arrest, and apoptosis. The control of the growth of gastrointestinal mucosa is unique and, compared with most other tissue in the body, complex.