Nitric oxide(NO), an important biological messenger and effector molecule,is involved in the regulation of various physiologic functions and exerts the protective effect on gastrointestinal tract.

• 一氧化氮是生物体内重要的信使分子和效应分子,参与多种生理功能的调节,在胃肠道系统中具有保护胃粘膜的作用。