期刊
AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY
卷 292, 期 3, 页码 G699-G705出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpgi.00517.2006
关键词
acidosis; acid-induced motor programs; acid-sensing ion channels; gastric acid; hyperalgesia; inflammation; ionotropic purinoceptor ion channels; ischemia; mucosal protection; pain; transient receptor potential ion channels of the vanilloid subtype; two-pore domain potassium channels
资金
- Austrian Science Fund FWF [L 25] Funding Source: Medline
Luminal acidity is a physiological challenge in the foregut, and acidosis can occur throughout the gastrointestinal tract as a result of inflammation or ischemia. These conditions are surveyed by an elaborate network of acid- governed mechanisms to maintain homeostasis. Deviations from physiological values of extracellular pH are monitored by multiple acid sensors expressed by epithelial cells and sensory neurons. Acid-sensing ion channels are activated by moderate acidification, whereas transient receptor potential ion channels of the vanilloid subtype are gated by severe acidosis. Some ionotropic purinoceptor ion channels and two-pore domain background K+ channels are also sensitive to alterations of extracellular pH.
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