目的:探讨异烟肼、利福平、吡嗪酰胺(HRZ)三联抗结核药/表皮转化生长因子(TGF)-β1 si RNA纳米脂质体对体外BCG感染的人巨噬细胞中Ag85A及TGF-β1表达的影响。方法:体外培养人单核细胞株THP-1诱导分化成巨噬细胞,分为4组,空白组为单纯...目的:探讨异烟肼、利福平、吡嗪酰胺(HRZ)三联抗结核药/表皮转化生长因子(TGF)-β1 si RNA纳米脂质体对体外BCG感染的人巨噬细胞中Ag85A及TGF-β1表达的影响。方法:体外培养人单核细胞株THP-1诱导分化成巨噬细胞,分为4组,空白组为单纯巨噬细胞培养;模型组为巨噬细胞与卡介苗(bacillus calmetteguerin,BCG)以1∶5的比例共培养3h,制备BCG感染的巨噬细胞模型;对照组为BCG感染的巨噬细胞与HRZ三联抗结核药纳米脂质体共培养;实验组为BCG感染的巨噬细胞与三种不同浓度的HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体(C1组为35mg/ml,C2组为40mg/ml,C3组为50mg/ml)共培养。采用RT-PCR检测各组人巨噬细胞中Ag85A及TGF-β1的mRNA表达量,Western-blot方法检测Ag85A及TGF-β1的蛋白表达量。结果:与空白组相比,模型组Ag85A和TGF-β1的m RNA及蛋白量表达明显上调(P<0.05);对照组中Ag85A的mRNA及蛋白量和TGF-β1的mRNA水平与模型组相比明显下调(P<0.05);实验组3种不同浓度(C1组、C2组、C3组)HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体处理后,Ag85A和TGF-β1的mRNA及蛋白表达量与模型组和对照组相比进一步下调(P<0.05),随着纳米脂质体浓度的增加,Ag85A和TGF-β1 m RNA及蛋白表达量有明显下降趋势,C1组与C3组相比Ag85A m RNA及蛋白表达量差异有统计学意义(P<0.05);C1组与C2组、C3组相比TGF-β1 mRNA及蛋白量表达差异有统计学意义(P<0.05);C2组与C3组相比Ag85A m RNA和TGF-β1蛋白表达量差异有统计学意义(P<0.05)。结论:HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体对体外BCG感染的人巨噬细胞具有明显的下调Ag85A基因表达作用及TGF-β1基因沉默作用。展开更多
A series of new cyclic phosphoramidate mustard-quinazoline conjugates were designed and synthesized based on the drug candidate EMB-3, a multi-target-directed ligand against tumor cells, and their anti-tumor activitie...A series of new cyclic phosphoramidate mustard-quinazoline conjugates were designed and synthesized based on the drug candidate EMB-3, a multi-target-directed ligand against tumor cells, and their anti-tumor activities were evaluated on breast cancer and lung cancer cells. Compound 6d exhibited the best anti-tumor performance with IC5o = 0.6 pM （8-fold of EMB-3） on BT474 breast tumor cells. Compound 6d inhibited epidermal growth factor receptor （EGFIL biomarker for NSCLC） and human epidermal growth factor 2 （HER2, biomarker for breast cancer） with IC50 of 18 nM and 78 nM, respectively. The preliminary pharmacokinetic study revealed that 6d was more stable than EMB-3 during the in vivo metabolism. A single dose per os （PO） administration of 6d in rat model （10 mg/kg） resulted in a moderate tl/2 of 1.7 h. These results indicated that compound 6d was a potential lead compound for the treatment of breast cancer.展开更多
文摘目的:探讨异烟肼、利福平、吡嗪酰胺(HRZ)三联抗结核药/表皮转化生长因子(TGF)-β1 si RNA纳米脂质体对体外BCG感染的人巨噬细胞中Ag85A及TGF-β1表达的影响。方法:体外培养人单核细胞株THP-1诱导分化成巨噬细胞,分为4组,空白组为单纯巨噬细胞培养;模型组为巨噬细胞与卡介苗(bacillus calmetteguerin,BCG)以1∶5的比例共培养3h,制备BCG感染的巨噬细胞模型;对照组为BCG感染的巨噬细胞与HRZ三联抗结核药纳米脂质体共培养;实验组为BCG感染的巨噬细胞与三种不同浓度的HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体(C1组为35mg/ml,C2组为40mg/ml,C3组为50mg/ml)共培养。采用RT-PCR检测各组人巨噬细胞中Ag85A及TGF-β1的mRNA表达量,Western-blot方法检测Ag85A及TGF-β1的蛋白表达量。结果:与空白组相比,模型组Ag85A和TGF-β1的m RNA及蛋白量表达明显上调(P<0.05);对照组中Ag85A的mRNA及蛋白量和TGF-β1的mRNA水平与模型组相比明显下调(P<0.05);实验组3种不同浓度(C1组、C2组、C3组)HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体处理后,Ag85A和TGF-β1的mRNA及蛋白表达量与模型组和对照组相比进一步下调(P<0.05),随着纳米脂质体浓度的增加,Ag85A和TGF-β1 m RNA及蛋白表达量有明显下降趋势,C1组与C3组相比Ag85A m RNA及蛋白表达量差异有统计学意义(P<0.05);C1组与C2组、C3组相比TGF-β1 mRNA及蛋白量表达差异有统计学意义(P<0.05);C2组与C3组相比Ag85A m RNA和TGF-β1蛋白表达量差异有统计学意义(P<0.05)。结论:HRZ三联抗结核药/TGF-β1 si RNA纳米脂质体对体外BCG感染的人巨噬细胞具有明显的下调Ag85A基因表达作用及TGF-β1基因沉默作用。
基金Ministry of Science and Technology of China(Grant No.2012ZX09103101-042)
文摘A series of new cyclic phosphoramidate mustard-quinazoline conjugates were designed and synthesized based on the drug candidate EMB-3, a multi-target-directed ligand against tumor cells, and their anti-tumor activities were evaluated on breast cancer and lung cancer cells. Compound 6d exhibited the best anti-tumor performance with IC5o = 0.6 pM （8-fold of EMB-3） on BT474 breast tumor cells. Compound 6d inhibited epidermal growth factor receptor （EGFIL biomarker for NSCLC） and human epidermal growth factor 2 （HER2, biomarker for breast cancer） with IC50 of 18 nM and 78 nM, respectively. The preliminary pharmacokinetic study revealed that 6d was more stable than EMB-3 during the in vivo metabolism. A single dose per os （PO） administration of 6d in rat model （10 mg/kg） resulted in a moderate tl/2 of 1.7 h. These results indicated that compound 6d was a potential lead compound for the treatment of breast cancer.
