一氧化氮是由左旋精氨酸在一氧化氮合成酶催化下生成的一种具有多种生物学活性的特殊神经递质,它不仅参与调节血压、维持血管张力、抑制心肌收缩、抑制血小板聚集与白细胞对血管壁的粘附作用以及防止动脉粥样硬化的形成与发展,还参与了机体感染防御、防止肿瘤生长、介导细胞毒性作用以及调节细胞凋亡等,在机体内发挥了极其重要的病理、生理作用;其介导的细胞毒性作用,可导致细胞膜脂质过氧化,在衰老过程中具有一定的作用。 Nitric oxide, a special neurotransmitter produced by L-arginine catalyzed by nitric oxide synthase, has a variety of biological activities. It not only participates in regulating blood pressure, maintaining vascular tone, inhibiting myocardial contractions and inhibiting platelet aggregation And leukocyte adhesion to the vascular wall and prevent the formation and development of atherosclerosis, but also involved in the body’s infection defense, prevent tumor growth, mediate cytotoxic effects and regulate apoptosis, etc., played an extremely important role in the body The pathological and physiological role; its mediated cytotoxicity can lead to lipid peroxidation of the cell membrane, in the aging process has a certain role.