血清单胺氧化酶(serum-monoamine oxidase,S-MAO)系一类作用于不同单胺类化合物的酶。目前一致认为MAO的作用是能够促进结缔组织成熟,在胶原形成过程中参与最后阶段的所谓“架桥”。由于肝纤维或肝硬化时有大量胶原纤维产生,该酶可在血清中反映出来,且与肝脏纤维化的程度有平行关系,因此,测定该酶在血清中的活性,可以早期诊断肝纤维化。 Serum mono-amine oxidase (S-MAO) is a class of enzymes that act on different monoamine compounds. It is currently agreed that the role of MAO is to promote the formation of connective tissue in the collagen formation process involved in the final stage of so-called “bridging.” As a large number of collagen fibers are produced during liver fibrosis or cirrhosis, this enzyme can be reflected in serum and has a parallel relationship with the degree of hepatic fibrosis. Therefore, the activity of this enzyme in serum can be measured to diagnose hepatic fibrosis .