目的:研究拓扑异构酶(TOPO)Ⅱα启动子调控因子(SP1、ATF-2、SP3、NF-YA、NF-M、P53、CMYB、C-JUN、ICBP90)组蛋白甲基化修饰在苯中毒致造血毒性中的作用。方法:25例临床慢性苯中毒患者骨髓单个核细胞为病例组,25例正常人骨髓单个核细...目的:研究拓扑异构酶(TOPO)Ⅱα启动子调控因子(SP1、ATF-2、SP3、NF-YA、NF-M、P53、CMYB、C-JUN、ICBP90)组蛋白甲基化修饰在苯中毒致造血毒性中的作用。方法:25例临床慢性苯中毒患者骨髓单个核细胞为病例组,25例正常人骨髓单个核细胞为对照组,染色质免疫沉淀分析(Ch IP)技术探讨TOPOⅡα启动子各调控因子组蛋白甲基化水平的变化,RT-PCR法测定TOPO Ⅱα启动子各调控因子m RNA表达水平的改变。结果:1与对照组比较,病例组TOPO Ⅱα启动子调控因子NF-M、C-JUN组蛋白H3K4甲基化水平下降,差异有统计学意义(P<0.05),SP1、ATF-2、SP3、NF-YA、P53、C-MYB、ICBP90组蛋白H3K4甲基化水平无明显改变(P>0.05);SP1、NF-M组蛋白H3K9甲基化水平升高,差异有统计学意义(P<0.05或P<0.01),而ATF-2、SP3、NF-YA、P53、C-MYB、C-JUN、ICBP90组蛋白H3K9甲基化水平无明显改变(P>0.05)。2与对照组比较,病例组TOPO Ⅱα启动子调控因子SP1、NF-YA、C-MYB、NF-M及C-JUN m RNA表达水平降低,差异有统计学意义(P<0.05或P<0.01),ATF-2、ICBP90 m RNA表达水平不变(P>0.05),SP3、P53 m RNA表达水平则升高(P<0.05或P<0.01)。结论:1慢性苯中毒TOPO Ⅱα启动子调控因子组蛋白化学修饰水平的改变伴随着调控因子m RNA水平的变化。2TOPO Ⅱα启动子调控因子组蛋白甲基化修饰在苯中毒所致的造血毒性中发挥一定的作用。展开更多
Base on the related researches at home and abroad, using systematic analysis principle mathematical modeling techniques, analysis model of organ collection properties, root structure model, mechanism model of spatial ...Base on the related researches at home and abroad, using systematic analysis principle mathematical modeling techniques, analysis model of organ collection properties, root structure model, mechanism model of spatial form of organs and dynamic model of plant topological structure in line with the growth of long-staple cotton are constructed, and three-dimensional dynamic simulation of long-staple cotton in southern Xinjiang is finally achieved. The system can promote people＇s understanding and perception on growth process of long-staple cotton in southern Xinjiang, which provides support for analysis of relationship between structure and function of long-staple cotton, design of ideal plant and regulation of growth model.展开更多
文摘目的:研究拓扑异构酶(TOPO)Ⅱα启动子调控因子(SP1、ATF-2、SP3、NF-YA、NF-M、P53、CMYB、C-JUN、ICBP90)组蛋白甲基化修饰在苯中毒致造血毒性中的作用。方法:25例临床慢性苯中毒患者骨髓单个核细胞为病例组,25例正常人骨髓单个核细胞为对照组,染色质免疫沉淀分析(Ch IP)技术探讨TOPOⅡα启动子各调控因子组蛋白甲基化水平的变化,RT-PCR法测定TOPO Ⅱα启动子各调控因子m RNA表达水平的改变。结果:1与对照组比较,病例组TOPO Ⅱα启动子调控因子NF-M、C-JUN组蛋白H3K4甲基化水平下降,差异有统计学意义(P<0.05),SP1、ATF-2、SP3、NF-YA、P53、C-MYB、ICBP90组蛋白H3K4甲基化水平无明显改变(P>0.05);SP1、NF-M组蛋白H3K9甲基化水平升高,差异有统计学意义(P<0.05或P<0.01),而ATF-2、SP3、NF-YA、P53、C-MYB、C-JUN、ICBP90组蛋白H3K9甲基化水平无明显改变(P>0.05)。2与对照组比较,病例组TOPO Ⅱα启动子调控因子SP1、NF-YA、C-MYB、NF-M及C-JUN m RNA表达水平降低,差异有统计学意义(P<0.05或P<0.01),ATF-2、ICBP90 m RNA表达水平不变(P>0.05),SP3、P53 m RNA表达水平则升高(P<0.05或P<0.01)。结论:1慢性苯中毒TOPO Ⅱα启动子调控因子组蛋白化学修饰水平的改变伴随着调控因子m RNA水平的变化。2TOPO Ⅱα启动子调控因子组蛋白甲基化修饰在苯中毒所致的造血毒性中发挥一定的作用。
基金Supported by Regional Natural Science Foundation of China(61062007)~~
文摘Base on the related researches at home and abroad, using systematic analysis principle mathematical modeling techniques, analysis model of organ collection properties, root structure model, mechanism model of spatial form of organs and dynamic model of plant topological structure in line with the growth of long-staple cotton are constructed, and three-dimensional dynamic simulation of long-staple cotton in southern Xinjiang is finally achieved. The system can promote people＇s understanding and perception on growth process of long-staple cotton in southern Xinjiang, which provides support for analysis of relationship between structure and function of long-staple cotton, design of ideal plant and regulation of growth model.
