免疫系统的作用表现为免疫激活和免疫抑制两个方面。这两方面相互作用,相反相成,使免疫系统稳定,从而保障免疫反应的适度,使免疫系统在经受各种刺激的条件下,仍能维持机体的生理平衡状态。但如免疫调节平衡破坏,则可引起某些疾病。七十年代以来,开始重视免疫抑制因素的研究。本文介绍免疫抑制因素及其在生理和病理方面的意义。免疫抑制因素包括体液性免疫抑制因素和细胞性免疫抑制因素两类 The immune system’s role in immune activation and immune suppression in two areas. The two sides interact with each other in opposite concurrences to stabilize the immune system and thus ensure the appropriate degree of immune response so that the immune system can maintain the physiological balance of the body under various stimuli. However, if the immunomodulatory balance is compromised, certain diseases may be caused. Since the seventies, began to pay attention to the study of immunosuppressive factors. This article describes immunosuppressive factors and their implications in physiology and pathology. Immunosuppressive factors include humoral immunosuppressive factors and cellular immunosuppressive factors