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Author: Peter R. Kvietys Publisher: Morgan & Claypool Publishers ISBN: 1615041176 Category : Medical Languages : en Pages : 127
Book Description
The microcirculation of the gastrointestinal tract is under the control of both myogenic and metabolic regulatory systems. The myogenic mechanism contributes to basal vascular tone and the regulation of transmural pressure, while the metabolic mechanism is responsible for maintaining an appropriate balance between O2 demand and O2 delivery. In the postprandial state, hydrolytic products of food digestion elicit a hyperemia, which serves to meet the increased O2 demand of nutrient assimilation. Metabolically linked factors (e.g., tissue pO2, adenosine) are primarily responsible for this functional hyperemia. The fenestrated capillaries of the gastrointestinal mucosa are relatively permeable to small hydrolytic products of food digestion (e.g., glucose), yet restrict the transcapillary movement of larger molecules (e.g., albumin). This allows for the absorption of hydrolytic products of food digestion without compromising the oncotic pressure gradient governing transcapillary fluid movement and edema formation. The gastrointestinal microcirculation is also an important component of the mucosal defense system whose function is to prevent (and rapidly repair) inadvertent epithelial injury by potentially noxious constituents of chyme. Two pathological conditions in which the gastrointestinal circulation plays an important role are ischemia/reperfusion and chronic portal hypertension. Ischemia/reperfusion results in mucosal edema and disruption of the epithelium due, in part, to an inflammatory response (e.g., increase in capillary permeability to macromolecules and neutrophil infiltration). Chronic portal hypertension results in an increase in gastrointestinal blood flow due to an imbalance in vasodilator and vasoconstrictor influences on the microcirculation. Table of Contents: Introduction / Anatomy / Regulation of Vascular Tone and Oxygenation / Extrinsic Vasoregulation: Neural and Humoral / Postprandial Hyperemia / Transcapillary Solute Exchange / Transcapillary Fluid Exchange / Interaction of Capillary and Interstitial Forces / Gastrointestinal Circulation and Mucosal Defense / Gastrointestinal Circulation and Mucosal Pathology I: Ischemia/Reperfusion / Gastrointestinal Circulation and Mucosal Pathology II: Chronic Portal Hypertension / Summary and Conclusions / References / Author Biography
Author: Peter R. Kvietys Publisher: Morgan & Claypool Publishers ISBN: 1615041176 Category : Medical Languages : en Pages : 127
Book Description
The microcirculation of the gastrointestinal tract is under the control of both myogenic and metabolic regulatory systems. The myogenic mechanism contributes to basal vascular tone and the regulation of transmural pressure, while the metabolic mechanism is responsible for maintaining an appropriate balance between O2 demand and O2 delivery. In the postprandial state, hydrolytic products of food digestion elicit a hyperemia, which serves to meet the increased O2 demand of nutrient assimilation. Metabolically linked factors (e.g., tissue pO2, adenosine) are primarily responsible for this functional hyperemia. The fenestrated capillaries of the gastrointestinal mucosa are relatively permeable to small hydrolytic products of food digestion (e.g., glucose), yet restrict the transcapillary movement of larger molecules (e.g., albumin). This allows for the absorption of hydrolytic products of food digestion without compromising the oncotic pressure gradient governing transcapillary fluid movement and edema formation. The gastrointestinal microcirculation is also an important component of the mucosal defense system whose function is to prevent (and rapidly repair) inadvertent epithelial injury by potentially noxious constituents of chyme. Two pathological conditions in which the gastrointestinal circulation plays an important role are ischemia/reperfusion and chronic portal hypertension. Ischemia/reperfusion results in mucosal edema and disruption of the epithelium due, in part, to an inflammatory response (e.g., increase in capillary permeability to macromolecules and neutrophil infiltration). Chronic portal hypertension results in an increase in gastrointestinal blood flow due to an imbalance in vasodilator and vasoconstrictor influences on the microcirculation. Table of Contents: Introduction / Anatomy / Regulation of Vascular Tone and Oxygenation / Extrinsic Vasoregulation: Neural and Humoral / Postprandial Hyperemia / Transcapillary Solute Exchange / Transcapillary Fluid Exchange / Interaction of Capillary and Interstitial Forces / Gastrointestinal Circulation and Mucosal Defense / Gastrointestinal Circulation and Mucosal Pathology I: Ischemia/Reperfusion / Gastrointestinal Circulation and Mucosal Pathology II: Chronic Portal Hypertension / Summary and Conclusions / References / Author Biography
Author: Kenneth Murphy Publisher: Garland Science ISBN: 9780815344575 Category : Medical Languages : en Pages :
Book Description
The Janeway's Immunobiology CD-ROM, Immunobiology Interactive, is included with each book, and can be purchased separately. It contains animations and videos with voiceover narration, as well as the figures from the text for presentation purposes.
Author: P. Malfertheiner Publisher: S. Karger AG (Switzerland) ISBN: 9783318026320 Category : Languages : en Pages : 0
Book Description
This special topic issue of 'Digestive Diseases' contains contributions discussing the subject in-depth. 'Digestive Diseases' is a well-respected, international peer-reviewed journal in Gastroenterology. Special topic issues are included in the subscription.
Author: Brian D. Gulbransen Publisher: Biota Publishing ISBN: 1615046615 Category : Medical Languages : en Pages : 72
Book Description
The enteric nervous system (ENS) is a complex neural network embedded in the gut wall that orchestrates the reflex behaviors of the intestine. The ENS is often referred to as the “little brain” in the gut because the ENS is more similar in size, complexity and autonomy to the central nervous system (CNS) than other components of the autonomic nervous system. Like the brain, the ENS is composed of neurons that are surrounded by glial cells. Enteric glia are a unique type of peripheral glia that are similar to astrocytes of the CNS. Yet enteric glial cells also differ from astrocytes in many important ways. The roles of enteric glial cell populations in the gut are beginning to come to light and recent evidence implicates enteric glia in almost every aspect of gastrointestinal physiology and pathophysiology. However, elucidating the exact mechanisms by which enteric glia influence gastrointestinal physiology and identifying how those roles are altered during gastrointestinal pathophysiology remain areas of intense research. The purpose of this e-book is to provide an introduction to enteric glial cells and to act as a resource for ongoing studies on this fascinating population of glia. Table of Contents: Introduction / A Historical Perspective on Enteric Glia / Enteric Glia: The Astroglia of the Gut / Molecular Composition of Enteric Glia / Development of Enteric Glia / Functional Roles of Enteric Glia / Enteric Glia and Disease Processes in the Gut / Concluding Remarks / References / Author Biography
Author: Nathaniel A. White Publisher: CRC Press ISBN: 159161029X Category : Medical Languages : en Pages : 772
Book Description
This title allows users to effectively diagnose and treat any acute disease of the stomach, intestines, peritoneum, liver, and abdominal wall. Its authorship includes over 20 internationally recognized experts that provide critical information needed by practitioners for management of abdominal diseases. This informative resource provides a thorough discussion of normal and abnormal anatomy and physiology. Surgical techniques are broken down into an easy-to-read step-by-step format. This highly visual presentation, with over 410 illustrations, is a necessary edition to an equine practitioner’s library. Published by Teton New Media in the USA and distributed by Manson Publishing outside of North America.
Author: Gyula Mózsik Publisher: Springer Science & Business Media ISBN: 9401153922 Category : Medical Languages : en Pages : 366
Book Description
The scientific main programmes of these series of symposia changed from time to time following the international scientific trends. The main programmes of the First Symposium were: 1. Gastric and intestinal cytoprotection; 2. Hepatoprotection; 3. Pancreatic protection. For the second one: 1. Gastrointestinal mucosal 'cytoprotection'; 2. Liver 'cytoprotection'; 3. Pancreatic 'cytoprotection'; 4. Free radicals and scavangers; 5. Computer approach to cytoprotec tion. For the third one: 1. Basic, central, peripheral and cellular mechanisms of gastrointestinaol cytoprotection; 2. Esophagal protection; 3. Gastric protection; 4. Small intestinal injury and protection; 5. Large bowel injury and protection; 6. Liver injury and protection; 7. Pancreas injury and protection. The main scientific programmes of the Fourth International Symposium on 'Cell Injury and Protection in the Gastrointestinal Tract' are: 1. General mechanisms of gastrointestinal injury and protection; 2. Cell injury and protection in the stomach; 3. Cell injury and protection in the small intestine and in the large bowel; 4. Cell injury and protection in the liver and pancreas; 5. Cell injury and protection of the premalignant status and malignant diseases in the gastrointestinal tract. The presented papers are published in this book. The abstracts of this meeting were published in Digestive Diseases and Sciences, and we record appreciation of the Editor ofthatjoumal for their publication. Some of the papers published here have appeared in Inflammopharmacology 1996;4:331-398.
Author: Peter R. Kvietys
Author: Peter R. Kvietys
Author: Kenneth Murphy
Author: John W. Harmon
Author: Jonh W. Harmon
Author: Sandor Szabo
Author: P. Malfertheiner
Author: Brian D. Gulbransen
Author: Nathaniel A. White
Author: Gyula Mózsik
Author: Klaus J. Lewin