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1、中南藥學(xué)2014年8月第12卷第8期CentralSouthPharmacy.August2014.Vo1.12No.8開口箭乙醇提取物誘導(dǎo)肝癌細(xì)胞HepG2凋亡活性研究謝錦艷,許苗苗,劉銀環(huán),宋蓓,劉越,劉海靜,宋小妹(1.陜西中醫(yī)學(xué)院藥學(xué)院,陜西咸陽712046;2.陜西省食品藥品檢驗(yàn)所,西安710065)摘要:目的探討開口箭根部乙醇提取物(ERT-95)對(duì)肝癌細(xì)胞HepG2生長的影響及其抗腫瘤作用的可能機(jī)制。方法采用MTT法繪制HepG2細(xì)胞生長曲線,檢測ERT-95對(duì)HepG2細(xì)胞的生長抑制作用;采用光學(xué)顯微鏡觀察HepG2細(xì)胞的凋亡形態(tài)變化;采用Hoc
2、hest染色原理檢測HepG2細(xì)胞凋亡情況;采用Westernblot檢測CytC蛋白的表達(dá);采用caspase活性檢測試劑盒檢測caspase.3、caspase.9的活性變化:采用DNAladder凝膠電泳技術(shù)檢測DNA的裂解情況。結(jié)果MTT結(jié)果顯示,ERT-95對(duì)HepG2細(xì)胞的抑制作用呈劑量依賴性(/Q為52.57gg·mL);光學(xué)顯微鏡下,處理組細(xì)胞出現(xiàn)皺縮、變圓等形態(tài)變化:Hochest.33258染色后的處理組細(xì)胞呈現(xiàn)典型的凋亡結(jié)構(gòu);Westernblot結(jié)果顯示,隨著藥物濃度增加,CytC蛋白表達(dá)上調(diào);caspase活性檢測顯示,caspase-
3、3、caspase-9活性逐步升高;與對(duì)照組相比,處理組瓊脂糖凝膠電泳圖譜出現(xiàn)DNA條帶。結(jié)論ER195有顯著的體外促腫瘤細(xì)胞凋亡作用,初步研究其促腫瘤細(xì)胞凋亡機(jī)制是通過線粒體釋放cVtc,進(jìn)一步活化caspase一9和caspase.3而激活內(nèi)源性核酸內(nèi)切酶,導(dǎo)致DNA裂解而實(shí)現(xiàn)的關(guān)鍵詞:開口箭;抗腫瘤;機(jī)制;肝癌細(xì)胞HepG2中圖分類號(hào):R285,R965文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1672.2981(2014)08—0735—05doi:10.7539~.issn.1672-2981.2014.08.004Antitumoreffectofethanolext
4、ractfromtherootofTupistrachinensisBaker.onthelivercancercelllineHepG2XIEJin-yan,XUMiao-miao,LIUYin.huan,SONGBei,LIUYue,LIUHai-jing,SONGXiao.mei(1.SchoolofPharmacy,ShaanxiUniversityofTraditionalChineseMedicine,XianyangShaanxi712046;2.ShaanxiFoodandDrugInspectionOfice,Xi’an710065)Abstr
5、act:ObjectiveToobservetheantitumoreffectofethano1extractfromtherootofTupistrachinensisBaker.(ERT-95)onthelivercancercelllineHepG2.a(chǎn)ndtoexploreitspotentialmechanisms.MethodsThegrowthcurvesandthecytostaticeffectOfEI95ontheHepG2cellswereevaluatedbyMTTassay.ThemorphologicalchangesinHepG2
6、cellswereobservedbyopticalmicroscopes;EI95inducedcellapoptosisdeathonHepG2cellswasmeasuredbyHochest33258staining.TheeffectonexpressionsofCytochromeC(CytC、proteininHepG2cellsweredetectedbyWesternblot.Caspase.3andcaspase一9activitiesweremeasuredwithcaspaseactivityassaykit.Theinfectedcel
7、lswereexaminedforDNAfragmentationbyagarosege1electrODhOresis.ResultsMTTassayshowedthatEr.95wasabletoinhibittheHepG2cellsinadose—dependentmanner.Theconcentrationrequiredfor50%inhibition(IC50)was52.57g。mL一1.Themorphologicalchangesduetoapoptosisincluedeshrinkingofcellsandroundcellsunder
8、anopticalmic