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时间:2019-02-27
《藏药佐太对大鼠cyp1a2和nat2活性的影响δ》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、Δ藏药佐太对大鼠CYP1A2和NAT2活性的影响*范雪汝,朱俊博,姚星辰,袁明,李向阳(青海大学医学院药学系,西宁810001)中图分类号R966文献标志码A文章编号1001-0408(2015)28-3932-03DOI10.6039/j.issn.1001-0408.2015.28.15摘要目的:研究藏药佐太对大鼠细胞色素氧化酶(CYP1A2)、药物代谢酶N-乙酰基转移酶2(NAT2)活性的影响。方法:将70只SD大鼠随机均分为正常对照(生理盐水)组和佐太低、中、高剂量(1.2、3.8、12mg/kg)单次给药组和多次给药组(每天1次,连续12d),分别ig给药。正常对照组、佐太单次
2、给药组于第2天,佐太多次给药组于第13天分别ig给予咖啡因(25mg/kg),5h后采集尿液,按10mg/ml加入维生素C。采用高效液相色谱法测定大鼠尿液中咖啡因代谢物5-乙酰氨基-6-甲酰氨基-3-甲基尿酸(AFMU)、1-甲基黄嘌呤(1X)、1-甲基尿酸(1U)、1,7-二甲基尿酸(17U)的含量,以(AFMU+1X+1U)/17U、AFMU/(AFMU+1X+1U)比值来反映CYP1A2和NAT2活性。结果:与正常对照组比较,佐太中剂量单次给药组及多次给药组、高剂量多次给药组大鼠(AFMU+1X+1U)/17U、AFMU/(AFMU+1X+1U)比值降低,即CYP1A2和NAT2活
3、性降低,差异有统计学意义(P<0.05)。结论:佐太对大鼠CYP1A2和NAT2活性有明显抑制作用。关键词藏药;佐太;N-乙酰基转移酶2;细胞色素氧化酶;大鼠EffectsofTibetanMedicineZuotaiontheActivitiesofCYP1A2andNAT2inRatsFANXue-ru,ZHUJun-bo,YAOXing-cheng,YUANMing,LIXiang-yang(Dept.ofPharmacy,MedicalCollegeofQinghaiUniversity,Xining810001,China)ABSTRACTOBJECTIVE:Tostudyth
4、eeffectsofTibetanmedicineZuotaiontheactivitiesofcytochromeoxidase(CYP1A2)anddrugmetabolismenzymeN-acetyltransferase2(NAT2)inrats.METHODS:70SDratswereequallyrandomizedintoanormalcontrol(normalsaline)group,thegroupsofsingleadministrationoflow,middleandhigh-dose(1.2,3.8and12mg/kg)Zuotaiandthegroupso
5、fmultipleadministrationsthereof(oncedailyfor12consecutivedays).Theratsweregivendrugsig.caffeine(25mg/kg)wasgivenigtotheratsinthenormalcontrolgroupandthegroupsofsingleadministrationonthe2ndday,andtothoseinthegroupsofmultipleadministrationsonthe13thday.5hlater,theirurinewascollectedandaddedwithvita
6、minCbasedon10mg/ml.Highperformanceliquidchromatography(HPLC)wasadoptedtodeterminethecafeinemetabolitescontentsof5-acetami-do-6-formamido-3-methyl-uricacid(AFMU),1-methylxanthine(1X),1-methyl-uricacid(1U)and1,7-dimethyluricacid(17U)inrats’urine,andtheactivitiesofCYP1A2andNAT2werereflectedthrough(A
7、FMU+1X+1U)/17UandAFMU/(AFMU+1X+1U).RESULTS:Comparedwithnormalcontrolgroup,the(AFMU+1X+1U)/17UandAFMU/(AFMU+1X+1U)inratswerede-creased,namelytheactivitiesofCYP1A2andNAT2werelowerinthegroupsofsingleadministrationofmiddle
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