目的通过尼扎替丁的大鼠体内、外实验,观察尼扎替丁对大鼠CYP1A2亚型的影响。方法通过HPLC法测定全血中咖啡因的代谢率,观测尼扎替丁对大鼠CYP1A2活性的影响;通过W estern b lot法测定尼扎替丁对大鼠肝微粒体CYP1A2蛋白表达的调控;通过H...目的通过尼扎替丁的大鼠体内、外实验,观察尼扎替丁对大鼠CYP1A2亚型的影响。方法通过HPLC法测定全血中咖啡因的代谢率,观测尼扎替丁对大鼠CYP1A2活性的影响;通过W estern b lot法测定尼扎替丁对大鼠肝微粒体CYP1A2蛋白表达的调控;通过HPLC法测定肝微粒体重组系统对乙酰氨基酚的含量,确定尼扎替丁对大鼠肝微粒体CYP1A2亚型的作用。结果实验组中给予大鼠不同浓度的尼扎替丁(14、27、54 mg.kg-1),其咖啡因代谢率为29.6%±12.5%、32.4%±13.4%、37.5%±15.0%,对照组为26.9%±11.9%,各剂量组及对照组间差异均无显著性(P>0.05);实验各剂量组与对照组的CYP1A2蛋白表达差异无显著性;肝微粒体体外重组系统中,实验组各浓度尼扎替丁对CYP1A2没有抑制作用,CYP1A2的活性>100%;对照组α-萘黄酮有明显的抑制作用,IC50=0.0306μmol.L-1。结论体内、外实验结果均表明尼扎替丁对大鼠CYP1A2没有抑制作用。展开更多
[Objective] The aim was to study the heat stress mechanism of differen tially expressed genes in rat jejunal mucosal.[Method] Variable cluster analysis and cluster analysis of samples on the differentially expressed h...[Objective] The aim was to study the heat stress mechanism of differen tially expressed genes in rat jejunal mucosal.[Method] Variable cluster analysis and cluster analysis of samples on the differentially expressed heat stress genes in rat jejunal mucosal were carried out with SAS software,and statistics of distribution of the differentially expressed genes on chromosomes were conducted.[Result] The differentially expressed genes were divided into seven categories,of which,the upregulated genes included three categories （i.e.：Category A：Hspa1a,Hspa1b,Hspb1,Hsph1,Dnaja4,Ahsa2 and P4ha1; Category B：Cyp1a2,Zbtb16,Gucy2g,Fgb,Cyp4a3 and Etv2; and Category C：Cyp1a2,Chac1 and Cyp4b1） and the down-regulated genes included four categories （i.e.：Category D：Tlr2,Noxo1,LOC286989 and Aspg; Category E：RGD1560395,Alb and BQ194726; Category F：Ccl4,Gzmk,Al228153,Anxa10,S100a9 and Ascl5; and Category G：Reg1a and Slc13a1）.The classification,function and reasons of differential expression for each gene category were analyzed.[Conclusion] Most of the three categories of up-regulated genes were related to the heat shock proteins; and most of the four categories of down-regulated genes were related to the immunity,providing reference for discussion of the heat stress mechanism.展开更多
文摘目的通过尼扎替丁的大鼠体内、外实验,观察尼扎替丁对大鼠CYP1A2亚型的影响。方法通过HPLC法测定全血中咖啡因的代谢率,观测尼扎替丁对大鼠CYP1A2活性的影响;通过W estern b lot法测定尼扎替丁对大鼠肝微粒体CYP1A2蛋白表达的调控;通过HPLC法测定肝微粒体重组系统对乙酰氨基酚的含量,确定尼扎替丁对大鼠肝微粒体CYP1A2亚型的作用。结果实验组中给予大鼠不同浓度的尼扎替丁(14、27、54 mg.kg-1),其咖啡因代谢率为29.6%±12.5%、32.4%±13.4%、37.5%±15.0%,对照组为26.9%±11.9%,各剂量组及对照组间差异均无显著性(P>0.05);实验各剂量组与对照组的CYP1A2蛋白表达差异无显著性;肝微粒体体外重组系统中,实验组各浓度尼扎替丁对CYP1A2没有抑制作用,CYP1A2的活性>100%;对照组α-萘黄酮有明显的抑制作用,IC50=0.0306μmol.L-1。结论体内、外实验结果均表明尼扎替丁对大鼠CYP1A2没有抑制作用。
基金Supported by General Program of Science and Technology Development Project of Beijing Municipal Education(KM201110020010)Non-profit Industry Technology Projectof the Ministry of Agriculture funded by Funding Program for Academic Human Resources Development in Institutions of Higher Learning Under the Jurisdiction of Beijing Municipality of China[201003060-(9-10)]
文摘[Objective] The aim was to study the heat stress mechanism of differen tially expressed genes in rat jejunal mucosal.[Method] Variable cluster analysis and cluster analysis of samples on the differentially expressed heat stress genes in rat jejunal mucosal were carried out with SAS software,and statistics of distribution of the differentially expressed genes on chromosomes were conducted.[Result] The differentially expressed genes were divided into seven categories,of which,the upregulated genes included three categories （i.e.：Category A：Hspa1a,Hspa1b,Hspb1,Hsph1,Dnaja4,Ahsa2 and P4ha1; Category B：Cyp1a2,Zbtb16,Gucy2g,Fgb,Cyp4a3 and Etv2; and Category C：Cyp1a2,Chac1 and Cyp4b1） and the down-regulated genes included four categories （i.e.：Category D：Tlr2,Noxo1,LOC286989 and Aspg; Category E：RGD1560395,Alb and BQ194726; Category F：Ccl4,Gzmk,Al228153,Anxa10,S100a9 and Ascl5; and Category G：Reg1a and Slc13a1）.The classification,function and reasons of differential expression for each gene category were analyzed.[Conclusion] Most of the three categories of up-regulated genes were related to the heat shock proteins; and most of the four categories of down-regulated genes were related to the immunity,providing reference for discussion of the heat stress mechanism.
