痰分泌物中的免疫球蛋白成份主要是分泌型免疫球蛋白SIgA。已经证明SIgA对多种细菌、病毒、毒素以及某些大分子食物蛋白具有抗体活性,对于保护粘膜组织免受微生物的侵害,阻止或减少机体对抗原、毒素、过敏原及某些致癌因子的吸收起十分重要作用。虽然已经知道SIgA是由粘膜的上皮和存在于粘膜固有层的游走性浆细胞合成与分泌的,但 The immunoglobulin component in the sputum secretion is mainly secreted immunoglobulin SIgA. It has been proved that SIgA has antibody activity against various bacteria, viruses, toxins and some macromolecular food proteins. It protects mucosal tissues from microorganisms and prevents or reduces the absorption of antigens, toxins, allergens and certain carcinogenic factors by the body. Plays a very important role. Although it has been known that SIgA is synthesized and secreted by mucosal epithelium and migrating plasma cells present in the lamina propria,