免疫复合物产生于抗原与抗体发生反应以后。免疫复合物的形成是正常的免疫应答的一个组成部分。在罕见的情况下,免疫复合物能引起一连串的损伤,导致疾病的发生。这类疾病的主要特点是效应系统不适当的激活或丧失作用。这样的一些机理看起来完全是生理性的。然而,现在所公认的免疫复合物疾病是其病理性转归。 Immune complexes arise after the antigen has reacted with the antibody. The formation of immune complexes is an integral part of the normal immune response. In rare cases, immune complexes can cause a series of injuries, leading to the occurrence of the disease. The main feature of these diseases is that the effect system is inappropriately activated or deactivated. Some of these mechanisms seem completely physiological. However, what is now recognized as immune complex disease is its pathological outcome.