資源描述:
《EGCG對(duì)人肝癌細(xì)胞的抑制作用及其可能的機(jī)制-論文.pdf》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在應(yīng)用文檔-天天文庫(kù)。
1、中國(guó)腫瘤生物治療雜志http://www.biother.orgChinJCancerBiother,F(xiàn)eb.2014,Vo1.21,No.1·38··基礎(chǔ)研究·doi:10.3872/j.issn.1007-385X.2014.O1.007EGCG對(duì)人肝癌細(xì)胞的抑制作用及其可能的機(jī)制張勇,沈筱蕓,馮雁,謝裕安,張力圖,利基林,羅小玲(廣西醫(yī)科大學(xué)附屬腫瘤醫(yī)院實(shí)驗(yàn)研究部,廣西南寧530021)[摘要]目的:觀察表沒(méi)食子兒茶素沒(méi)食子酸酯[(-)一epigallocatechin一3一gallate,EGCG]對(duì)體外培養(yǎng)的人肝癌細(xì)胞株生物學(xué)特性的影
2、響,研究其作用效果與血紅素氧合酶一1(hemeoxygenase一1,H0—1)及相關(guān)信號(hào)分子的關(guān)系,探討其作用機(jī)制。方法:利用MTr法檢測(cè)EGCG對(duì)HepG2、Sk—hepl、SMMC7721等肝癌細(xì)胞增殖的影響,并用吖啶橙/溴化乙錠(AO/EB)雙染法觀察肝癌細(xì)胞的形態(tài)學(xué)變化,流式細(xì)胞術(shù)檢測(cè)EGCG作用后Sk—hepl細(xì)胞周期的變化,Real—timePCR和Westernblotting法檢測(cè)EGCG作用后Sk—hepl細(xì)胞中HO一1、IL一10及TNF—等信號(hào)分子表達(dá)的變化。結(jié)果:EGCG作用后,3株肝癌細(xì)胞貼壁細(xì)胞數(shù)量顯著少于對(duì)照組,
3、凋亡細(xì)胞數(shù)增多[HepG2:(16.33±3.51)us(3.67±1.15)個(gè),P<0.01),Sk—hepl:(18.33±2.31)vs(2.33±2.08)個(gè),P<0.01),SMMC7721:(15.33±3.06)us(3.33±2.08)個(gè),P<0.O1)]。實(shí)驗(yàn)組Sk—hepl細(xì)胞G2/M期比例明顯高于對(duì)照組[(34.33±8.09)%(3.07±2.32)%,P<0.01]。設(shè)對(duì)照組基準(zhǔn)值為1.00,實(shí)驗(yàn)組Sk—hepl細(xì)胞中HO一1、IL一10、及TNF.ot的mRNA相對(duì)表達(dá)水平依次為(0.58±0.15)、(5.91±1
4、.11)、(5.29±1.14),差別均有統(tǒng)計(jì)學(xué)意義(P<0.01);與對(duì)照組相比,實(shí)驗(yàn)組HO一1蛋白表達(dá)水平明顯下調(diào)(0.16±0.04us0.33±0.08,P<0.05),IL一10(0.42±0.06'us0.24±0.08,P=0.034,P<0.05)和TNF.蛋白(0.95±0.17vs0.58±0.08,P<0.05)表達(dá)水平明顯上調(diào)。結(jié)論:EGCG可抑制肝癌細(xì)胞增殖及誘導(dǎo)細(xì)胞凋亡,并將Sk—hepl細(xì)胞阻滯在G/M期,其機(jī)制可能與HO一1、IL一10、TNF一0l等炎癥信號(hào)分子表達(dá)的變化有關(guān)。[關(guān)鍵詞]沒(méi)食子兒茶素沒(méi)食子酸酯;
5、肝癌細(xì)胞;血紅素氧合酶一1[中圖分類號(hào)]R735.7;R730.5[文獻(xiàn)標(biāo)志碼]A[文章編號(hào)]1007—385X(2014)01-00384)6Epigallocatechin-3--gallate·—inducedgrowthinhibitionandtheunderlyingmecha-nismsinhumanhepat0ce兒ularcarcinomacellsZhangYong,ShenXiaoyun,F(xiàn)engYah,XieYu’an,ZhangLitu,LiJilin,LuoXiaoling(DepartmentofResearch,
6、Affili—atedCancerHospitalofGuangxiMedicalUniversity,Nanning530021,Guangxi,China)【Abstract]Objective:ToinvestigatetheefectofEpiga11ocatechin一3一gallate(EGCG)onhepatocellularcarcinomacellgrowthandthemolecularmechanismsunderlyingtheeffeetvitro.Methods:Threehumanhepatocellularcar
7、cinomacelllines(i.e.,HepG2,Sk—heplandSMMC7721)wereusedinthisstudy.Cellswereculturedinthepresenceof0,40,80or120g/mlEGCG.At24,48and72hafterEGCGtreatment,cellviabilitywasassessedbyMTFassay,apoptosisbyAO/EBstaining,cellcycleprogressionbyflowcytometer,andmRNAandproteinlevelsofHO1
8、1,IL一10andTNF—otbyReahimePCRandWesternblottingrespectively.Results:EGCGtrea