| Gastric secretion. | |
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MedLine Citation:
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PMID: 20838342 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE OF REVIEW: This review summarizes the past year's literature regarding the regulation of gastric exocrine and endocrine secretion at the central, peripheral, and cellular levels. RECENT FINDINGS: Gastric acid secretion is an intricate and dynamic process that is regulated by neural (efferent and afferent), hormonal (e.g., gastrin), and paracrine (e.g., histamine, ghrelin, somatostatin) pathways as well as mechanical (e.g., distension) and chemical (e.g., protein, glutamate, coffee, and ethanol) stimuli. Secretion of hydrochloric acid by the parietal cell involves recruitment and fusion of HK-adenosine triphosphatase (HK-ATPase)-containing cytoplasmic tubulovesicles with the apical membrane with subsequent electroneutral transport of hydronium ions in exchange for potassium; the source of the latter is the potassium channel, KCNQ1. Concomitantly, chloride exits via the cystic fibrosis transmembrane regulator. Inhibition of the HK-ATPase by proton pump inhibitors leads to a compensatory hypergastrinemia which, if prolonged, results in parietal and enterochromaffin-like cell hyperplasia. The clinical consequence is rebound acid secretion which may induce dyspeptic symptoms in healthy individuals and exacerbate reflux symptoms in patients with gastroesophageal reflux disease. SUMMARY: We continue to make progress in our understanding of the regulation of gastric acid secretion in health and disease. A better understanding of the pathways and mechanisms regulating acid secretion should lead to improved management of patients with acid-induced disorders as well as those who secrete too little acid. |
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Authors:
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Mitchell L Schubert |
Publication Detail:
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Type: Editorial; Review |
Journal Detail:
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Title: Current opinion in gastroenterology Volume: 26 ISSN: 1531-7056 ISO Abbreviation: Curr. Opin. Gastroenterol. Publication Date: 2010 Nov |
Date Detail:
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Created Date: 2010-10-15 Completed Date: 2011-01-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8506887 Medline TA: Curr Opin Gastroenterol Country: United States |
Other Details:
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Languages: eng Pagination: 598-603 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adenosine Triphosphatases
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metabolism Animals Gastric Acid / metabolism, secretion* Gastric Mucosa / secretion* Humans Ion Channels Parietal Cells, Gastric / metabolism, secretion* Proton Pump Inhibitors / adverse effects Signal Transduction Stimulation, Chemical |
| Chemical | |
Reg. No./Substance:
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0/Ion Channels; 0/Proton Pump Inhibitors; EC 3.6.1.-/Adenosine Triphosphatases |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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