目的:探讨舒尼替尼诱导人肝癌HepG2细胞表达的自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)与核因子kappa B(nuclear factor B kappa,NF-κB)信号通路之间的相互作用。方法:常规体外培养HepG2细胞,利用...目的:探讨舒尼替尼诱导人肝癌HepG2细胞表达的自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)与核因子kappa B(nuclear factor B kappa,NF-κB)信号通路之间的相互作用。方法:常规体外培养HepG2细胞,利用实时荧光定量PCR检测1μmol/L舒尼替尼处理HepG2细胞24 h前后NF-κB基因家族成员mRNA的表达情况,利用计算机辅助设计并合成NF-κB1、NF-κB2和Rel B siRNA引物,通过脂质体法将目的基因siRNA转染于HepG2细胞,荧光显微镜观察转染情况,实时荧光定量PCR检测干扰效率,Western blotting检测siRNA转染前后He G2细胞内NF-κB1、NF-κB2和Rel B蛋白表达,流式细胞术检测siRNA前后HepG2细胞NKG2DLs表达率。结果:实时荧光定量PCR结果显示,舒尼替尼处理HepG2细胞后,NF-κB1、NF-κB2和Rel B mRNA表达水平升高,主要以NF-κB2 mRNA和Rel B mRNA升高为主。荧光显微镜观测siRNA转染后HepG2细胞红色荧光表达率约为60%,干扰效率达95%以上。siRNA转染后HepG2细胞内NF-κB1、NF-κB2和Rel B蛋白表达水平明显下降,siRNA转染+药物组NKG2DLs表达率明显低于药物处理组(P<0.05)。结论:首次揭示了舒尼替尼通过NF-κB旁路途径诱导肿瘤细胞表达NKG2DLs。展开更多
目的:探讨舒尼替尼通过NF-κB信号通路诱导肝癌HepG2细胞表达自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)的分子机制。方法:常规体外培养HepG2细胞,单细胞凝胶电泳检测1μmol/L舒尼替尼处理HepG2细胞2...目的:探讨舒尼替尼通过NF-κB信号通路诱导肝癌HepG2细胞表达自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)的分子机制。方法:常规体外培养HepG2细胞,单细胞凝胶电泳检测1μmol/L舒尼替尼处理HepG2细胞24 h前后DNA损伤情况,实时荧光定量PCR检测药物处理前后细胞DNA损伤修复分子mRNA的表达,Western blotting检测分别以NF-κB激动剂和抑制剂处理HepG2细胞前后NKG2DLs蛋白表达及IKKα和IκBα表达情况。结果:舒尼替尼药物处理后,HepG2细胞均发生不同程度DNA损伤;且AP-1、ATM、ATR mRNA表达水平明显升高,而CHK1、CHK2、GSK3βmRNA表达水平明显降低;不同处理组间DNA损伤修复相关信号分子mRNA表达有显著差异(F=61.242,P=0.000)。NF-κB转录活性抑制剂JSH-23可降低HepG2细胞NKG2DLs蛋白表达量,而NF-κB转录活性激动剂TNF-α、PMA均可增加HepG2细胞NKG2DLs蛋白表达量(F=15.043,P=0.000);舒尼替尼处理肿瘤细胞后NF-κB的抑制分子IKKα被抑制,而激活分子IκBα被激活。结论:舒尼替尼可通过DNA损伤修复分子激活NF-κB旁路途径诱导肿瘤细胞表达NKG2DLs。展开更多
Sea cucumber（Apostichopus japonicus） is one of the economically important farmed echinoderm species in North China. The NF-κB/Rel transcription factors can function as key regulators to modulate the expression of i...Sea cucumber（Apostichopus japonicus） is one of the economically important farmed echinoderm species in North China. The NF-κB/Rel transcription factors can function as key regulators to modulate the expression of immune-related genes in response to immune challenge or environmental stress. And as a crucial enzyme in innate immunity, lysozyme plays a key role in the overall defense against pathogens in A. japonicus. In the present study, the expression of NF-κB/Rel and lysozyme mRNA against bacterial challenge in sea cucumber was investigated. After bacterial challenge, the Aj-rel mRNA transcripts increased significantly and reached the peak at 10 min（3.26-fold, P0.05）; the Aj-p105 gene expression showed a rising trend and reached the peak at 240 min（6.12-fold, P0.05）; and the Aj-p50 mRNA transcripts showed a downward trend and reached the peak at 10 min（17.80-fold, P 0.05）. The lysozyme mRNA expression level showed two peaks at 10 min（1.54-fold, P 0.05） and 240 min（2.48-fold, P 0.05）, respectively. This study will provide certain reference for further understanding on the immune defense mechanism and offer enlightenment to disease control of echinoderm.展开更多
文摘目的:探讨舒尼替尼诱导人肝癌HepG2细胞表达的自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)与核因子kappa B(nuclear factor B kappa,NF-κB)信号通路之间的相互作用。方法:常规体外培养HepG2细胞,利用实时荧光定量PCR检测1μmol/L舒尼替尼处理HepG2细胞24 h前后NF-κB基因家族成员mRNA的表达情况,利用计算机辅助设计并合成NF-κB1、NF-κB2和Rel B siRNA引物,通过脂质体法将目的基因siRNA转染于HepG2细胞,荧光显微镜观察转染情况,实时荧光定量PCR检测干扰效率,Western blotting检测siRNA转染前后He G2细胞内NF-κB1、NF-κB2和Rel B蛋白表达,流式细胞术检测siRNA前后HepG2细胞NKG2DLs表达率。结果:实时荧光定量PCR结果显示,舒尼替尼处理HepG2细胞后,NF-κB1、NF-κB2和Rel B mRNA表达水平升高,主要以NF-κB2 mRNA和Rel B mRNA升高为主。荧光显微镜观测siRNA转染后HepG2细胞红色荧光表达率约为60%,干扰效率达95%以上。siRNA转染后HepG2细胞内NF-κB1、NF-κB2和Rel B蛋白表达水平明显下降,siRNA转染+药物组NKG2DLs表达率明显低于药物处理组(P<0.05)。结论:首次揭示了舒尼替尼通过NF-κB旁路途径诱导肿瘤细胞表达NKG2DLs。
文摘目的:探讨舒尼替尼通过NF-κB信号通路诱导肝癌HepG2细胞表达自然杀伤细胞2族成员D配体(natural killer group 2 member D ligands,NKG2DLs)的分子机制。方法:常规体外培养HepG2细胞,单细胞凝胶电泳检测1μmol/L舒尼替尼处理HepG2细胞24 h前后DNA损伤情况,实时荧光定量PCR检测药物处理前后细胞DNA损伤修复分子mRNA的表达,Western blotting检测分别以NF-κB激动剂和抑制剂处理HepG2细胞前后NKG2DLs蛋白表达及IKKα和IκBα表达情况。结果:舒尼替尼药物处理后,HepG2细胞均发生不同程度DNA损伤;且AP-1、ATM、ATR mRNA表达水平明显升高,而CHK1、CHK2、GSK3βmRNA表达水平明显降低;不同处理组间DNA损伤修复相关信号分子mRNA表达有显著差异(F=61.242,P=0.000)。NF-κB转录活性抑制剂JSH-23可降低HepG2细胞NKG2DLs蛋白表达量,而NF-κB转录活性激动剂TNF-α、PMA均可增加HepG2细胞NKG2DLs蛋白表达量(F=15.043,P=0.000);舒尼替尼处理肿瘤细胞后NF-κB的抑制分子IKKα被抑制,而激活分子IκBα被激活。结论:舒尼替尼可通过DNA损伤修复分子激活NF-κB旁路途径诱导肿瘤细胞表达NKG2DLs。
基金Supported by Key Technologies R&D Program of Shandong Province(2014GHY115024)Presidential Foundation of Marine Biology Institute of Shandong Province(SZJJ201303)~~
文摘Sea cucumber（Apostichopus japonicus） is one of the economically important farmed echinoderm species in North China. The NF-κB/Rel transcription factors can function as key regulators to modulate the expression of immune-related genes in response to immune challenge or environmental stress. And as a crucial enzyme in innate immunity, lysozyme plays a key role in the overall defense against pathogens in A. japonicus. In the present study, the expression of NF-κB/Rel and lysozyme mRNA against bacterial challenge in sea cucumber was investigated. After bacterial challenge, the Aj-rel mRNA transcripts increased significantly and reached the peak at 10 min（3.26-fold, P0.05）; the Aj-p105 gene expression showed a rising trend and reached the peak at 240 min（6.12-fold, P0.05）; and the Aj-p50 mRNA transcripts showed a downward trend and reached the peak at 10 min（17.80-fold, P 0.05）. The lysozyme mRNA expression level showed two peaks at 10 min（1.54-fold, P 0.05） and 240 min（2.48-fold, P 0.05）, respectively. This study will provide certain reference for further understanding on the immune defense mechanism and offer enlightenment to disease control of echinoderm.
