为探讨人大颗粒淋巴细胞抗菌分子的抗菌活性，采用制备性酸性尿素聚丙烯酰胺凝胶电泳对人大颗粒淋巴细胞胞浆颗粒酸溶性提取物的抗菌组分ＨＬＰ１、ＨＬＰ２、ＨＬＰ３进行分离纯化。结果：ＴｒｉｃｉｎｅＳＤＳＰＡＧＥ分析显示，ＨＬＰ１、ＨＬＰ２均为多肽混合物，其分子量范围分别是５６～１３ｋｄ和５６～８８ｋｄ；ＨＬＰ３为一７ｋｄ的单一多肽。琼脂糖弥散法和电泳凝胶琼脂糖弥散法抗菌试验显示，ＨＬＰ１、ＨＬＰ２、ＨＬＰ３对致病性大肠杆菌ＭＬ３５Ｐ氨苄青霉素耐药株、金葡球菌ＡＴＣＣ２５９２３株、绿脓杆菌ＡＴＣＣ２７８５３株均有很强的杀菌作用。提示人大颗粒淋巴细胞存在的小分子抗菌多肽可能在人天然免疫的抗感染防御机制中发挥了重要作用 In order to explore the antibacterial activity of human granulocyte lymphocyte antimicrobial molecules, using preparative acidic polyacrylamide gel electrophoresis of human granulocyte lymphocyte cytoplasmic acid-soluble extracts of the anti-bacterial components HLP 1, HLP 2, HLP 3 For separation and purification. Results: The results of TricineSDSPAGE showed that both HLP1 and HLP2 were peptide mixtures with molecular weights of 56 ~ 13kd and 56 ~ 88kd, respectively. HLP3 was a 7kd single polypeptide . Agarose diffusion method and gel electrophoresis gel agarose dispersion antibacterial test showed that HLP 1, HLP 2, HLP 3 pathogenic E. coli ML 35P ampicillin resistant Staphylococcus aureus ATCC25923 strain, pus Bacillus ATCC27853 strains have a strong bactericidal effect. Small molecule antimicrobial peptides that suggest the presence of human granulocyte lymphocytes may play an important role in the anti-infective defense mechanisms of human innate immunity