目的探讨依达拉奉后处理对神经元糖氧剥夺损伤的保护作用及对活性氧(ROS)/硫氧还蛋内结合蛋白(TXNIP)/NOD样受体相关蛋白3(NOD-like receptor associated protein 3,NLRP3)信号通路的影响。方法培养新生SD大鼠皮质神经元,经免疫荧光染...目的探讨依达拉奉后处理对神经元糖氧剥夺损伤的保护作用及对活性氧(ROS)/硫氧还蛋内结合蛋白(TXNIP)/NOD样受体相关蛋白3(NOD-like receptor associated protein 3,NLRP3)信号通路的影响。方法培养新生SD大鼠皮质神经元,经免疫荧光染色鉴定后随机分为神经元组、依达拉奉组、糖氧剥夺组、糖氧剥夺+依达拉奉组4组。各组神经元在完成处理后以CCK-8试剂盒检测神经元活力;以细胞凋亡试剂盒检测神经元凋亡情况;以ELISA试剂盒检测神经元ROS产生情况;以蛋白免疫印迹法检测ROS/TXNIP/NLRP3信号通路相关蛋白的表达水平。结果神经元缺糖缺氧后细胞活力显著降低,依达拉奉处理后又显著上升,差异有统计学意义(P<0.01);糖氧剥夺后,神经元凋亡水平、ROS含量、ROS/TXNIP/NLRP3通路相关IL-1β、TXNIP、IL-18、Caspase-1、ASC和NLRP3蛋白表达水平升高,依达拉奉处理后又显著下降,差异有统计学意义(P<0.01)。结论依达拉奉对神经元糖氧剥夺损伤具有保护作用,可能与其对R0S/TXN1P/NLKP3信号通路的抑制有关。展开更多
Interactions between a symmetrical tetramethyl-substituted cucurbit[6]uril (host:TMeQ[6]) and 1,ω-alkylenedipyridine (ω = 2,4,6,8,10) dicationic guests were investigated using 1H NMR spectroscopy and single crystal ...Interactions between a symmetrical tetramethyl-substituted cucurbit[6]uril (host:TMeQ[6]) and 1,ω-alkylenedipyridine (ω = 2,4,6,8,10) dicationic guests were investigated using 1H NMR spectroscopy and single crystal X-ray crystallography. In these inclusion complexes,combined cavity and portal binding in TMeQ[6] were observed,and the length of the bridged alkylene was found to play an important role not only in balancing the overall hydrophilic/hydrophobic interaction between the host and the guest,but also in defining the structure of the resulting inclusion complexes. For the guest 1,2-ethylenedipyridine (Edpy),TMeQ[6] includes a positively charged pyridine ring of Edpy to form an unsymmetrical inclusion complex; for the guest 1,4-butylenedipyridine (Bdpy),TMeQ[6] includes a positively charged pyridine ring of Bdpy,but the different competitive interactions in and between the related inclusion complexes could lead to a fast exchange between the hosts and guests. For the guests with longer bridge chains,such as 1,6-hexamethylenedipyridine (Hdpy) or 1,8-octylenedipyridine (Odpy),a stable pseudorotaxane inclusion complex is formed by combining the hydrophobic cavity and the outer portal dipoleion interactions. However,for 1,10-decatylenedipyridine (Ddpy),the two TMeQ[6] host molecules include the two end pyridine rings of Ddpy and form a dumbbell inclusion complex.展开更多
文摘目的探讨依达拉奉后处理对神经元糖氧剥夺损伤的保护作用及对活性氧(ROS)/硫氧还蛋内结合蛋白(TXNIP)/NOD样受体相关蛋白3(NOD-like receptor associated protein 3,NLRP3)信号通路的影响。方法培养新生SD大鼠皮质神经元,经免疫荧光染色鉴定后随机分为神经元组、依达拉奉组、糖氧剥夺组、糖氧剥夺+依达拉奉组4组。各组神经元在完成处理后以CCK-8试剂盒检测神经元活力;以细胞凋亡试剂盒检测神经元凋亡情况;以ELISA试剂盒检测神经元ROS产生情况;以蛋白免疫印迹法检测ROS/TXNIP/NLRP3信号通路相关蛋白的表达水平。结果神经元缺糖缺氧后细胞活力显著降低,依达拉奉处理后又显著上升,差异有统计学意义(P<0.01);糖氧剥夺后,神经元凋亡水平、ROS含量、ROS/TXNIP/NLRP3通路相关IL-1β、TXNIP、IL-18、Caspase-1、ASC和NLRP3蛋白表达水平升高,依达拉奉处理后又显著下降,差异有统计学意义(P<0.01)。结论依达拉奉对神经元糖氧剥夺损伤具有保护作用,可能与其对R0S/TXN1P/NLKP3信号通路的抑制有关。
基金Supported by the National Natural Science Foundation of China (Grant Nos. 20662003 & 20767001)the International Collaborative Project of Guizhou Province (Grant No. 2007400108)+1 种基金the Science Technology Fund of Guizhou Province (Grant No. J-2008-2012)the Natural Science Youth Foundation of Guizhou University (Grant No. 2007-005)
文摘Interactions between a symmetrical tetramethyl-substituted cucurbit[6]uril (host:TMeQ[6]) and 1,ω-alkylenedipyridine (ω = 2,4,6,8,10) dicationic guests were investigated using 1H NMR spectroscopy and single crystal X-ray crystallography. In these inclusion complexes,combined cavity and portal binding in TMeQ[6] were observed,and the length of the bridged alkylene was found to play an important role not only in balancing the overall hydrophilic/hydrophobic interaction between the host and the guest,but also in defining the structure of the resulting inclusion complexes. For the guest 1,2-ethylenedipyridine (Edpy),TMeQ[6] includes a positively charged pyridine ring of Edpy to form an unsymmetrical inclusion complex; for the guest 1,4-butylenedipyridine (Bdpy),TMeQ[6] includes a positively charged pyridine ring of Bdpy,but the different competitive interactions in and between the related inclusion complexes could lead to a fast exchange between the hosts and guests. For the guests with longer bridge chains,such as 1,6-hexamethylenedipyridine (Hdpy) or 1,8-octylenedipyridine (Odpy),a stable pseudorotaxane inclusion complex is formed by combining the hydrophobic cavity and the outer portal dipoleion interactions. However,for 1,10-decatylenedipyridine (Ddpy),the two TMeQ[6] host molecules include the two end pyridine rings of Ddpy and form a dumbbell inclusion complex.
