促吞噬肽(tuftsin)是一种促进吞噬作用的具有生物活性的肽片断。此肽在网状内皮系统中对巨噬细胞、多核自细胞(PMN)具有很高的特异性,并能增强该类细胞的吞噬和胞饮的机能,是机体内唯一的以游离形式存在的活性肽。 1967年Fidalgo和Najjar证实狗的血清中有一种特异的嗜白细胞Y球蛋白(Leucophilic gamm3 globulin)能与自身PMN Tuftsin is a biologically active peptide fragment that promotes phagocytosis. This peptide is highly specific to macrophages and multinucleated self-cells (PMNs) in the reticuloendothelial system and enhances phagocytosis and pinocytosis of such cells and is the only form of free-form in the body Active peptides. In 1967, Fidalgo and Najjar confirmed that the dog’s serum contained a specific Leucophilic gamm3 globulin that interacts with its own PMN