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补体系统由多种理化性质及免疫学特性不同的多肽或蛋白质组成,其中包括C_1至C_9的11种成分、备解素和补体抑制因子等。补体各成分在机体内以前体分子的不活动状态存在。当补体受某种因素刺激后。能够按一定顺序呈现链锁的酶促反应,使补体激活。激活的补体不仅直接参与机体的防御功能和调节机能;又能协助细胞免疫、体液免疫及吞噬系统发挥免疫作用。此外,激活的补体也能作为一种介质或者效应物,导致机体的免疫病理损伤。在人体发育过程中,补体是最早开始合成的一类免疫物质。该系统发育速度较快,成熟较早。为此,在小儿早期,当其它免疫功能系
Complement system consists of a variety of different physical and chemical properties and immunological properties of peptides or proteins, including 11 components C_1 to C_9, properdin and complement inhibitors. Complement components in the body to precursor molecules in the inactive state exists. When the complement is stimulated by some factor. A chain of enzymatic reactions can be presented in a certain order, complement activation. Activation of complement not only directly involved in the body’s defense and regulatory functions; but also to help cellular immunity, humoral immunity and phagocytosis system to play an immune role. In addition, activated complement can also serve as a mediator or effector, resulting in the immune pathology of the body. In the process of human development, complement is the first group of immune substances that begin to synthesize. The system develops rapidly and matures earlier. To this end, in early childhood, when other immune functions