血管基膜衍生多功能肽选择性抑制人肺癌细胞增殖

Vascular Basement Membrane Derived Multifunctional Peptide Selectively Inhibits Proliferation of Lung Cancer Cells

目的:观察重组血管基膜衍生多功能肽(Vascular basement membrane derived multifunctional peptide,VBM-DMP)对人肺癌细胞增殖的选择性抑制作用。方法:体外培养人肺癌(A549)细胞、人胚肺二倍体成纤维细胞(KMB-17),采用MTT比色法测定重组VBMDMP对A549细胞增殖的选择性抑制作用;台盼蓝染色细胞计数法观察重组VBMDMP对A549细胞和KMB-17细胞生长曲线的影响;采用人肺癌(A549)细胞裸鼠异种移植瘤模型治疗实验,评价重组VBMDMP治疗人肺癌的有效性。结果:体外实验结果表明重组VBMDMP能选择性抑制人肺癌(A549)细胞的增殖和生长,呈剂量依赖性,而对KMB-17细胞的增殖活性影响小;重组VBMDMP显著抑制人肺癌(A549)细胞裸鼠异种移植瘤的生长,呈剂量依赖性趋势。1 mg/kg和5 mg/kg重组VBMDMP的肿瘤生长抑制率分别是42%和74%,瘤重抑制率分别42%和77%,其中5mg/kg重组VBMDMP的肿瘤生长抑制率和瘤重抑制率均高于环磷酰胺(CTX100 mg/kg)、血管生成抑制剂烟曲霉素衍生物TNP-470(20 mg/kg)。结论:重组VBMDMP对人肺癌细胞(A549)的增殖和生长具有显著抑制作用,是一种选择性高,抗肿瘤作用强的新型抗肿瘤基因工程候选药物。

Objective To investigate the selective inhibitory effect of recombinant vascular basement membrane derived multifunctional peptide(VBMDMP) on proliferation of lung cancer cells.Methods The cytotoxic effect of recombinant VBMDMP on lung cancer cell line(A549) and normal cell line(KMB-17) was determined by MTT assay in vitro.Trypan Blue staining method was used to assess the influence of recombinant VBMDMP on growth of A549 and KMB-17.For studying the in vivo therapeutic effect of recombinant VBMDMP,human lun...