In this paper the results of inhibition of the Aldose reductase(AR) activity on Wistar rat lens by Quercetagetin extracted from Tagetes erects Linn and by Patuletin extracted from Tagetes patula Linn are reported.Quer...In this paper the results of inhibition of the Aldose reductase(AR) activity on Wistar rat lens by Quercetagetin extracted from Tagetes erects Linn and by Patuletin extracted from Tagetes patula Linn are reported.Quercetagetin inhibited AR of the rat lens by 93.9% at 10^(-4)M, 76.0% at 10^(-5)M and 13.3% at 10^(-6)M. Patuletin inhibited AR of the rat lens by 100% at 10^(-1)M, 80% at 10^(-5)M and 22.7% at 10^(-6)M respectively. The results show that these two flavones are lens AR Inhibitors, but further ...展开更多
分别以α-乳白蛋白、β-乳球蛋白和乳铁蛋白为乳化剂,食品级中碳链脂肪酸甘油三酯为油相,以槲皮万寿菊素为芯材,采用二级高压均质法制备槲皮万寿菊素水包油型纳米乳液。通过测定乳液粒径大小、多分散指数、Zeta电位、浊度来对比三种乳...分别以α-乳白蛋白、β-乳球蛋白和乳铁蛋白为乳化剂,食品级中碳链脂肪酸甘油三酯为油相,以槲皮万寿菊素为芯材,采用二级高压均质法制备槲皮万寿菊素水包油型纳米乳液。通过测定乳液粒径大小、多分散指数、Zeta电位、浊度来对比三种乳化剂的乳化效果,研究不同pH、离子强度、热处理对乳液理化性质的影响,利用分光光度法测定纳米乳液对槲皮万寿菊素的包埋率,并采用Lu Mi Sizer稳定性分析仪对样品稳定性进行分析检测。结果表明,乳化剂种类对乳液粒径大小、分布情况有显著影响,以α-乳白蛋白为乳化剂稳定的槲皮万寿菊素纳米乳液平均粒径最小,为285.3±3.3 nm,多分散指数为0.19±0.03,包埋率约96.8%。在不同pH、离子强度和热处理条件下,以α-乳白蛋白为乳化剂稳定的槲皮万寿菊素纳米乳液具有最优的稳定性。展开更多
Objective:To explore the role of proto-oncogene Pim-1 in the proliferation and migration of nasopharyngeal carcinoma(NPC) cells.Methods:Pim-1 expressions in NPC cell lines CNE1,CNE1-GL,CNE-2Z and C666-1 were examined ...Objective:To explore the role of proto-oncogene Pim-1 in the proliferation and migration of nasopharyngeal carcinoma(NPC) cells.Methods:Pim-1 expressions in NPC cell lines CNE1,CNE1-GL,CNE-2Z and C666-1 were examined by KT-PCR,western blotting and immunoflucesence,respectively.After CNE1,CNE1-GL and C666-1 cells were treated with different concentrations of Pim-1 special inhibitor,quercelagetin,the cell viability,colony formation rate and migration ability were analyzed.Results:Pim-1 expression was negative in well-differentiated CNE1 cells,whereas expressed weakly positive in poor-differentiated CNE-2Z cells and strongly positive in undifferentiated C666-1 cells.Interestingly,CNE1-GL cells that derived from CNE1 transfected with an Epstein Barr virus latent membrane protein-1 over-expression plasmid displayed stronger expression of Pim-1.Treatment of CNE1-GL and C666-1 cells with quercelagetin significantly decreased the cell viability,colony formation rate and migration ability but not the CNE1 cells.Conclusions:These findings suggest that Pim-1 overexpression contributes to NPC proliferation and migration,and targeting Pim-1 may be a potential treatment for anti-Pim-1-expressed NPCs.展开更多
文摘In this paper the results of inhibition of the Aldose reductase(AR) activity on Wistar rat lens by Quercetagetin extracted from Tagetes erects Linn and by Patuletin extracted from Tagetes patula Linn are reported.Quercetagetin inhibited AR of the rat lens by 93.9% at 10^(-4)M, 76.0% at 10^(-5)M and 13.3% at 10^(-6)M. Patuletin inhibited AR of the rat lens by 100% at 10^(-1)M, 80% at 10^(-5)M and 22.7% at 10^(-6)M respectively. The results show that these two flavones are lens AR Inhibitors, but further ...
文摘为解析槲皮万寿菊素、槲皮素与叶黄素单独处理以及联合处理对急性肺损伤的作用机制,以脂多糖诱导构建RAW264.7细胞炎症模型,以一氧化氮(nitric oxide,NO)相对含量为评价指标,采用联合指数法确定槲皮万寿菊素与叶黄素以及槲皮素与叶黄素的最佳复配比例;分析比较槲皮万寿菊素、槲皮素与叶黄素单独及联合处理对RAW264.7细胞中炎症因子(肿瘤坏死因子-α、白细胞介素(interleukin,IL)-1β、IL-6)含量、丙二醛含量、超氧化物歧化酶活性以及谷胱甘肽过氧化物酶活性的影响;采用免疫印迹法测定核因子κB(nuclear factor kappa-B,NF-κB)信号通路中p65、p50以及沉默信息调节因子1(silent information regulator 1,SIRT1)、核因子E2相关因子2(nuclear factor-erythroid 2 related factor 2,Nrf2)和NOD样受体热蛋白结构域相关蛋白3(NOD-like receptor thermal protein domain associated protein 3,NLRP3)的相对表达量。结果表明,槲皮万寿菊素与叶黄素高剂量3∶1(30μg/mL+10μg/mL)复配能够最大程度降低RAW264.7细胞中的NO相对含量。二者单独及联合作用均能通过降低炎症因子、丙二醛含量,提高超氧化物歧化酶和谷胱甘肽还原酶活性,下调NF-κB p65、p50以及NLRP3表达水平并上调SIRT1、Nrf2蛋白相对表达量发挥改善急性肺损伤的作用,且联合处理效果优于单独处理组。
文摘分别以α-乳白蛋白、β-乳球蛋白和乳铁蛋白为乳化剂,食品级中碳链脂肪酸甘油三酯为油相,以槲皮万寿菊素为芯材,采用二级高压均质法制备槲皮万寿菊素水包油型纳米乳液。通过测定乳液粒径大小、多分散指数、Zeta电位、浊度来对比三种乳化剂的乳化效果,研究不同pH、离子强度、热处理对乳液理化性质的影响,利用分光光度法测定纳米乳液对槲皮万寿菊素的包埋率,并采用Lu Mi Sizer稳定性分析仪对样品稳定性进行分析检测。结果表明,乳化剂种类对乳液粒径大小、分布情况有显著影响,以α-乳白蛋白为乳化剂稳定的槲皮万寿菊素纳米乳液平均粒径最小,为285.3±3.3 nm,多分散指数为0.19±0.03,包埋率约96.8%。在不同pH、离子强度和热处理条件下,以α-乳白蛋白为乳化剂稳定的槲皮万寿菊素纳米乳液具有最优的稳定性。
基金supported by grants from the Doctoral Program of Guangdong Medical College(B2010013)National Natural Science Foundation of China(81000073)Natural Foundation of Hainan Province of China 1811197, 310043,and 811201)
文摘Objective:To explore the role of proto-oncogene Pim-1 in the proliferation and migration of nasopharyngeal carcinoma(NPC) cells.Methods:Pim-1 expressions in NPC cell lines CNE1,CNE1-GL,CNE-2Z and C666-1 were examined by KT-PCR,western blotting and immunoflucesence,respectively.After CNE1,CNE1-GL and C666-1 cells were treated with different concentrations of Pim-1 special inhibitor,quercelagetin,the cell viability,colony formation rate and migration ability were analyzed.Results:Pim-1 expression was negative in well-differentiated CNE1 cells,whereas expressed weakly positive in poor-differentiated CNE-2Z cells and strongly positive in undifferentiated C666-1 cells.Interestingly,CNE1-GL cells that derived from CNE1 transfected with an Epstein Barr virus latent membrane protein-1 over-expression plasmid displayed stronger expression of Pim-1.Treatment of CNE1-GL and C666-1 cells with quercelagetin significantly decreased the cell viability,colony formation rate and migration ability but not the CNE1 cells.Conclusions:These findings suggest that Pim-1 overexpression contributes to NPC proliferation and migration,and targeting Pim-1 may be a potential treatment for anti-Pim-1-expressed NPCs.