The thiophene isomer fractions were investigated by TLC (thin layer chromatography) and GLC (gas liquid chromatography). The TLC analysis revealed that, 5-(4-acetoxy-l-butynyl)-2,2-bithenyl (BBTOAc, Rf 0.78 I)...The thiophene isomer fractions were investigated by TLC (thin layer chromatography) and GLC (gas liquid chromatography). The TLC analysis revealed that, 5-(4-acetoxy-l-butynyl)-2,2-bithenyl (BBTOAc, Rf 0.78 I); 5-(3-buten-l-ynyl)-2,2-bithineyl (BBT, Rf 0.39 II) and 2,2,5,2-oc-terthienyl (∝-T, Rf 0.32 III) were detected in extracts of leaf, stem and root calli or suspension cultures of Tagetes erecta and T. patula as well as leaf cell culture of T. patula which treated with DL-tryptophan under light or dark conditions. The GLC quantitative analysis of thiophenes in subjected revealed that the percentage distribution of the major thiophenes in all the analysed samples were determined as follows: BBT II 〉 ∝ -TllI 〉 BBTOAc I. Another thiophene was determined in relatively small amounts and found to be 5-(3-penten-l-ynyl)-2,2-bithienyl (PBT IV). Other thiophenes were quantitated in trace amounts with unidentified or unknown chemical structure from the investigated extracts.展开更多
文摘The thiophene isomer fractions were investigated by TLC (thin layer chromatography) and GLC (gas liquid chromatography). The TLC analysis revealed that, 5-(4-acetoxy-l-butynyl)-2,2-bithenyl (BBTOAc, Rf 0.78 I); 5-(3-buten-l-ynyl)-2,2-bithineyl (BBT, Rf 0.39 II) and 2,2,5,2-oc-terthienyl (∝-T, Rf 0.32 III) were detected in extracts of leaf, stem and root calli or suspension cultures of Tagetes erecta and T. patula as well as leaf cell culture of T. patula which treated with DL-tryptophan under light or dark conditions. The GLC quantitative analysis of thiophenes in subjected revealed that the percentage distribution of the major thiophenes in all the analysed samples were determined as follows: BBT II 〉 ∝ -TllI 〉 BBTOAc I. Another thiophene was determined in relatively small amounts and found to be 5-(3-penten-l-ynyl)-2,2-bithienyl (PBT IV). Other thiophenes were quantitated in trace amounts with unidentified or unknown chemical structure from the investigated extracts.
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。