Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and ...Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and IFN-γ. The infrared （IR） spectra of these products showed the characteristic absorption of an azido group at 2127 cm^-1. By photo-immobilization, this modified TNF-α and IFN-γ were immobilized on polystyrene membranes for cell culture to prepare biomaterials. The micro-morphology of photoactive cytokines was observed with a scanning electron microscope （SEM）. The inhibitory effect on growth of Hela cells and inducing apoptosis activity of these two cytokines were analyzed by growth curve, transmission electron microscope （TEM） and fluorescence active cell sorter （FACS）. The results showed that co-immobilization of IFN-γ and TNF-α had significant inhibitory effect on growth of Hela cells, inhibitory rate up to 82%, and IFN-γ had obviously synergistic action.展开更多
文摘目的:观察加味独活寄生合剂治疗膝骨性关节炎的临床疗效及对关节液中白细胞介素-1(interleukin-1,IL^(-1)),白细胞介素-6(interleukin-1,IL-6),肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)及一氧化氮(NO)的影响。方法:将90例膝关节患者随机分为治疗组和对照组,各45例,治疗组予加味独活寄生合剂治疗,对照组予硫酸氨基葡萄糖胶囊治疗,8周后观察两组患者疗效,治疗前后均行关节穿刺取关节液,检测关节液中IL^(-1),IL-6,TNF-α及NO的含量,对两组患者进行分析比较。结果:两组患者治疗后视觉模拟评分(visual analogue scales,VAS)均明显降低(P<0.05);治疗后两组患者VAS评分比较,治疗组低于对照组(P<0.05);治疗组治疗后膝关节功能Western Ontario and Mc Master Univesrsities(WOMAC)评分优于对照组(P<0.05)。与治疗前比较,治疗后两组患者IL^(-1),IL-6,TNF-α及NO的含量均明显降低(P<0.05),两组患者组间比较无明显差异。结论:加味独活寄生合剂可减轻膝骨性关节炎患者疼痛,改善膝关节功能;加味独活寄生合剂能减少关节液中IL^(-1),IL-6,TNF-α及NO的含量,抑制炎症反应,从而改善临床症状,这可能是加味独活寄生合剂治疗膝骨关节炎的作用机制。
基金This work was supported by the China Postdoctoral Science Foundation under grant No.2004035588.
文摘Tumor necrosis factor α （TNF-α） and interferon-γ （IFN-γ） are cytokines with strong antitumor activities. They were reacted with a photoactive arylazide-4-azidobenzoic acid, resulting in photoactive TNF-α and IFN-γ. The infrared （IR） spectra of these products showed the characteristic absorption of an azido group at 2127 cm^-1. By photo-immobilization, this modified TNF-α and IFN-γ were immobilized on polystyrene membranes for cell culture to prepare biomaterials. The micro-morphology of photoactive cytokines was observed with a scanning electron microscope （SEM）. The inhibitory effect on growth of Hela cells and inducing apoptosis activity of these two cytokines were analyzed by growth curve, transmission electron microscope （TEM） and fluorescence active cell sorter （FACS）. The results showed that co-immobilization of IFN-γ and TNF-α had significant inhibitory effect on growth of Hela cells, inhibitory rate up to 82%, and IFN-γ had obviously synergistic action.
