自噬对双去甲氧基姜黄素诱导肝癌HepG2细胞凋亡作用的影响

目的:探讨自噬对双去甲氧基姜黄素诱导肝癌HepG2细胞凋亡作用的影响。方法:以24 mg·L~(-1)双去甲氧基姜黄素或联合5 mol·L~(-1)自噬抑制剂3-甲基腺嘌呤(3-methyladenine,3-MA)对HepG2细胞作用24,48 h,以四甲基偶氮唑盐(methye thiazolye telrazlium,MTT)比色法检测细胞活力;以24 mg·L~(-1)双去甲氧基姜黄素单用或联合3-MA对HepG2细胞作用48 h,Hoechst 33342染色倒置荧光显微镜观察细胞凋亡形态,磷脂结合蛋白V/碘化丙啶(Annxin V/propidium iodide,PI)双染检测细胞凋亡率,罗丹明123(Rhodamine 123,Rh123)染色检测线粒体膜电位,蛋白免疫印迹法(Western blot)检测自噬相关蛋白Beclin-1,LC3,半胱氨酸蛋白酶-3(Caspase-3),活化型Caspase-3(cleaved Caspase-3),B淋巴细胞瘤-2(Bcl-2),Bcl-2相关X蛋白(Bax)的活性表达。结果:与空白组比较,双去甲氧基姜黄素可抑制HepG2细胞增殖,诱导细胞凋亡,降低线粒体膜电位,使pro-Caspase-3,Bcl-2,LC3-Ⅰ蛋白表达降低(P0.01),升高cleaved Caspase-3,Bax,Beclin-1,LC3-Ⅱ蛋白的表达(P0.01);3-MA可增强双去甲氧基姜黄素所诱导的HepG2细胞凋亡,提高凋亡率(P0.01),增加其降低线粒体膜电位作用(P0.01),明显下调pro-Caspase-3,Bcl-2蛋白的表达(P0.01),并上调Beclin-1,LC3,cleaved Caspase-3蛋白的表达(P0.01)。结论:双去甲氧基姜黄素可经线粒体机制诱导HepG2细胞凋亡,并诱导细胞自噬,自噬对凋亡有抑制作用。     

斑蝥酸钠维生素B6诱导人肝癌HepG2细胞凋亡及周期阻滞

目的: 研究斑蝥酸钠维生素B6（艾易舒）注射液对人肝癌HepG2细胞增殖、细胞周期与凋亡的影响,探讨其分子机制。 方法: 将不同浓度的斑蝥酸钠维生素B6注射液（0,1,5,10 mg·L^-1）作用于人肝癌HepG2细胞12,24,48 h,MTT法检测细胞增殖抑制率,流式细胞学技术检测细胞凋亡率及细胞周期的变化,Western blot检测蛋白激酶B（Akt）,磷酸化蛋白激酶B（pAkt）,B细胞淋巴瘤-2基因相关X蛋白（Bax）,B细胞淋巴瘤-2基因（Bcl-2）及细胞周期依赖性激酶抑制因子p21蛋白表达变化,RT-PCR检测Bax,Bcl-2及p21 mRNA表达变化。 结果: 斑蝥酸钠维生素B6可显著抑制HepG2细胞的增殖,诱导细胞凋亡,具有显著的时间和浓度效应（P<0.05）;同时G₀/G₁期细胞比例显著升高,S期细胞比例显著降低（P<0.05）。Western blot结果显示斑蝥酸钠维生素B6可下调HepG2细胞中pAkt和Bcl-2蛋白的表达,上调Bax和p21蛋白的表达（P<0.05）。RT-PCR结果显示Bax,p21 mRNA的表达水平明显升高,而Bcl-2 mRNA的表达水平下降（P<0.05）。 结论: 斑蝥酸钠维生素B6可抑制人肝癌HepG2细胞的增殖,诱导其凋亡并引发G₀/G₁期阻滞,其机制可能与斑蝥酸钠维生素B6参与调控磷脂酰肌醇-3-激酶/蛋白激酶B（PI3K/Akt）通路有关。     

氧化槐定碱体内体外通过AKT/mTOR通路调控自噬抑制HBV诱发肝纤维化＊

目的 观察氧化槐定碱抑制HBV诱发肝纤维化的机制。方法 采用细胞间非接触式的共培养体系进行培养，同时建立HBV诱发肝纤维化的动物模型，四甲基偶氮唑蓝（MTT）法检测LX-2细胞抑制率，qRT-PCR法检测α-SMA、collagen I mRNA水平，Western blot检测细胞纤维化、自噬、AKT/mTOR信号通路相关蛋白表达水平，运用AKT-siRNA、雷帕霉素、自噬抑制剂（3-MA）探讨自噬对肝纤维化的影响。结果 体外实验显示：0.5-32 mg·L^-1氧化槐定碱抑制LX-2细胞的增殖（P<0.05）；与对照组比较，氧化槐定碱4、8、16、32 mg·L^-1组α-SMA、collagen I mRNA表达水平降低，Beclin-1、LC3 II/LC3 I水平上调，p-AKT/AKT、p-mTOR/mTOR水平下调（P<0.05）；与氧化槐定碱16 mg·L^-1组比较，氧化槐定碱16 mg·L^-1+AKT-siRNA组抑制率、LC3 II/LC3 I明显增加，p-AKT/AKT、collagen I明显降低（P<0.05）；与氧化槐定碱16 mg·L^-1组比较，氧化槐定碱16 mg·L^-1+3-MA组抑制率、LC3 II/LC3 I明显降低，p-AKT/AKT、collagen I明显增加（P<0.05）。体内实验显示：与氧化槐定碱组比较，氧化槐定碱+雷帕霉素组ALT、AST、collagen I、p-mTOR/mTOR水平明显下调，LC3 II/LC3 I水平明显上调；氧化槐定碱+3-MA组LC3 II/LC3 I水平明显下调，collagen I、p-mTOR/mTOR明显上调（均P<0.05）。结论 氧化槐定碱能调控肝细胞自噬，上调细胞纤维化水平，其机制可能与调控AKT/mTOR信号通路有关。     

女贞子提取物抑制人肝癌细胞血管生长因子表达作用研究

目的:研究女贞子提取物中熊果酸对人肝癌细胞生长抑制作用及对血管内皮生长因子(VEGF),转化生长因子-α(TGF-α)表达的抑制作用,探讨其抗肿瘤机制。方法:女贞子提取物与PLC/PRF/5细胞孵育,以四甲基偶氮唑蓝法(MTT)检测其对人肝癌细胞PLC/PRF/5生长的抑制作用,并通过酶联免疫吸附实验(ELISA)测定细胞培养上清液中VEGF,TGF-α的表达;小鼠右前肢腋皮下接种瘤细胞,连续给药14 d后取瘤组织,检测小鼠肿瘤的抑制率,并以免疫组织化学方法检测瘤组织VEGF,TGF-α表达。结果:女贞子提取物中的熊果酸在体内和体外试验结果均显示抑制人肝癌细胞生长,并对VEGF,TGF-α表达有明显的抑制作用。结论:女贞子提取物具有抗肿瘤作用,抑制VEGF,TGF-α表达可能是其抗肿瘤作用机制之一。     

佛手柑内酯通过PI3K/Akt信号通路诱导人肝癌细胞HepG2和Hep3B凋亡的机制

目的:探究佛手柑内酯通过磷脂酰肌醇-3-激酶(PI3K)/蛋白激酶B(Akt)信号通路诱导人肝癌细胞Hep G2和Hep3B凋亡的机制。方法:设立佛手柑内酯(5,50,200μmol·L~(-1))组和空白组;采用噻唑蓝(MTT)比色法检测佛手柑内酯作用Hep G2和Hep3B细胞24,48 h细胞增殖;磷脂结合蛋白V/碘化丙啶(Annexin V-FITC/PI)双染检测细胞凋亡;实时荧光定量逆转录聚合酶链反应(Real-time PCR)及蛋白免疫印迹法(Western bolt)检测相关m RNA和蛋白的表达含量;进行平板细胞克隆形成实验评价各组Hep G2和Hep3B细胞的克隆形成率与效果。结果:MTT实验表明,佛手柑内酯能明显抑制Hep G2和Hep3B细胞的增殖活性,且呈浓度依赖性;流式细胞仪分析结果表明,佛手柑内酯200μmol·L~(-1)组作用于Hep G2和Hep3B细胞48 h,有明显促凋亡作用(P 0. 05); Western blot结果显示,佛手柑内酯可以上调半胱氨酸蛋白酶(Caspase)-3,Caspase-8蛋白表达量(P 0. 05),并且下调B淋巴细胞瘤-2(Bcl-2),PI3K蛋白表达(P 0. 05); Real-time PCR显示PI3K,Akt m RNA相对表达量降低(P 0. 05);平板细胞克隆形成实验的结果显示,随着佛手柑内酯浓度的增加,各组细胞克隆形成率呈递减趋势,且佛手柑内酯200μmol·L~(-1)组作用降低明显(P 0. 05)。结论:佛手柑内酯对人肝癌细胞Hep G2和Hep3B的增殖存在抑制作用,其可能是通过PI3K/Akt信号通路诱导Hep G2和Hep3B细胞的凋亡。     

肝癌细胞系HepG2中侧群细胞的生物学特性观察

目的:分选肝癌细胞系HepG2中侧群细胞并观察其生物学特性。方法:利用流式细胞荧光激活分选技术分选肝癌细胞系HepG2中的侧群细胞(SP)。实验细胞分为SP细胞、非侧群细胞(NSP)以及未分选细胞(Total组)3群,分别采用细胞生长曲线法比较3群细胞的增殖能力,平板克隆形成实验和裸鼠成瘤实验观察其体内外成瘤能力。结果:HepG2细胞中分选出的SP细胞比例为(3.1±0.2)%,细胞生长曲线表明SP细胞的增殖速度快于NSP细胞和未分选细胞(P0.05),SP、NSP和未分选细胞软琼脂平板克隆形成率分别为66%、16%和32%;裸鼠体内成瘤率分别为100%(10/10)、30%(3/10)和70%(7/10),同时3组肿瘤平均质量分别为0.728g、0.185g及0.452g(P0.05)。结论:肝癌细胞系HepG2中SP细胞的成瘤性和增殖能力强于非SP细胞和未分选细胞,表明SP细胞在肝癌的发生、发展中具有重要作用。     

Graveoline Isolated from Ethanolic Extract of Ruta graveolens Triggers Apoptosis and Autophagy in Skin Melanoma Cells: A Novel Apoptosis‐Independent Autophagic Signaling Pathway

Anti‐cancer drugs generally kill cancer cells by apoptosis but fail to do so when they become resistant and escape apoptosis signals. But these resistant cells can still be killed by autophagy. Therefore, drugs having both apoptotic and autophagic abilities are solicited in effective cancer management. In search of such a drug, we examined the efficacy of graveoline, a bioactive compound isolated from Ruta graveolens on skin melanoma A375 cells through the use of specific signaling cascades and their inhibitors. Cytotoxicity of graveoline was tested by conducting MTT assay. Induction of autophagy and apoptosis was checked. Expression of related proteins and their localization were studied by conducting immunoblot assay and through confocal microscopy, respectively. We found graveoline‐induced Beclin‐1 associated autophagy in A375 cells and 3‐methyladenine, an inhibitor of autophagy did not affect apoptosis. Conversely, caspase inhibitor that blocked apoptosis did not affect autophagic cell death, suggesting thereby that these two were independent events. Use of reactive oxygen species (ROS) scavengers inhibited cell death, but blocking autophagy did not affect graveoline‐induced ROS generation, suggesting that ROS generation ensued autophagy. Thus, graveoline‐induced both apoptotic and autophagic cell death in skin melanoma cells, a desirable quality in effective anti‐cancer drug design. Copyright © 2013 John Wiley & Sons, Ltd.     

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??OBJECTIVE To discuss the effect and mechanisms of saikosaponin D (SSD) on apoptosis and autophagy of human hepatocellular carcinoma cells. METHODS The proliferation of cells in treatment of SSD was detected by MTT. The autophagosome was detected by GFP fluorescence staining. The apoptosis of hepatoma cells were detected by flow cytometry. The expressions of LC3-??, p-S6K1 and Beclin 1 in human hepatocellular carcinoma cells was detected by Western blot. RESULTS The proliferations of PLC, MHCC-97H, SMMC-7721 and Huh7 cells with SSD intervention for 48 h were dose-independent inhibited. The IC₅₀ of PLC, MHCC-97H, SMMC-7721 and Huh7 cells were 51.48, 46.19, 39.87, 48.95 ??mol??L^-1, respectively. After SSD treatment, the number of autophagosome of PLC, MHCC-97H, SMMC-7721 and Huh7 was significantly more than the normal control group (P<0.05). The apoptosis rate of PLC, MHCC-97H, SMMC-7721 and Huh7 cells induced by SSD+3-MA or SSD+z-DEVD-fmk was less than the SSD treated cells (P<0.05). The expressions of LC3-?? and phosphorylated S6K1 protein (p-S6K1) in PLC, MHCC-97H, SMMC-7721 and Huh7 cells induced by SSD were more than the normal cells, while the expression of Beclin 1 protein decreased. CONCLUSION It's suggested that SSD increase the autophagy and apoptosis of human hepatoma cells by regulating the mTORC signaling pathway.     

绞股蓝总皂苷对人肝癌细胞Bel-7402增殖与凋亡的影响

目的:探讨绞股蓝总皂苷(gypenosides,Gyp)对人肝癌细胞Bel-7402增殖与凋亡的影响.方法:采用MTT法检测Gyp对体外培养的人肝癌细胞Bel-7402的增殖抑制作用;单细胞凝胶电泳法检测Gyp对人肝癌细胞Bel-7402 DNA损伤的影响;RT-PCR技术从分子水平上检测Gyp对人肝癌细胞Bel-7402的诱导凋亡作用机制.结果:100 ～400 μg· mL-1的Gyp对人肝癌细胞Bel-7402增殖生长有抑制作用,Gyp(182 μg·mL-1)作用4,8,12,16,24 h后,单细胞凝胶电泳观测到DNA损伤,12h时DNA损伤最大,达到(81.15±14.23)％,且有时间依赖性;Gyp组细胞caspase-8大量表达,对照组细胞无表达.结论:Gyp能抑制人肝癌细胞Bel-7402增殖且促进其凋亡,其作用机制与DNA损伤以及caspase-8的大量表达有关.     

Dihydroartemisinin,an antimalarial drug,induces absent in melanoma 2 inflammasome activation and autophagy in human hepatocellular carcinoma HepG2215 cells

As an effective antimalarial drug, Dihydroartemisinin (DHA) is readily isolated from the traditional Chinese medicine of Artemisia annua. DHA is not only an autophagy promoter but also a substance with strong antitumor efficiency. The relationship between autophagy and inflammasomes has been suggested in hepatocellular carcinoma (HCC). However, there are few reports describing relationships between inflammasomes and autophagy in HCC therapy. The present study demonstrated that DHA suppressed cell proliferation in HepG2215 cells in a dose‐ and time‐dependent manner. The inhibitory activity is mediated by autophagy, in which reactive oxygen species (ROS) production induced nuclear and mitochondrial DNA damage. Then, DHA were first shown to promote AIM2/caspase‐1 inflammasome. Compared with the DHA group, the autophagy inhibitor 3‐MA significantly inhibited the expressions of activated Caspase‐1, a pyroptotic marker proteins. Meanwhile, repression of mTOR by rapamycin promoted autophagy and AIM2/caspase‐1 activation. The caspase‐1 inhibitor Z‐YVAD‐FMK also notably blocked autophagy cell death characterized by the downexpression of Beclin‐1 and LC3‐II. Additionally, the study demonstrated that DHA suppressed pseudopodium formation and cell mobility. Therefore, we first reveal a novel mechanism that DHA promotes AIM2/caspase‐1 inflammasome, which contributes to autophagy in HepG2215 cells. Moreover, nuclear and mitochondrial DNA damage was also involved in this process via ROS production.     

构树叶总黄酮对人肝癌细胞HepG-2增殖和凋亡的作用及其机制研究

目的:探讨构树叶总黄酮(TFBP)对人肝癌细胞(HepG-2)增殖和凋亡的作用。方法:采用细胞增殖实验(MTT法),取对数生长期HepG-2,随机分为药物组和对照组,用3,6,9,12 g.L-1不同质量浓度构树叶总黄酮作用HepG-2,分别干预24,48,72 h。通过流式细胞仪检测在以上质量浓度下作用细胞48 h后的细胞凋亡率,Western blont法检测以上质量浓度构树叶总黄酮作用细胞48 h后Bcl-2基因、促凋亡基因Bax表达的情况。结果:各质量浓度构树叶总黄酮对HepG-2的生长有显著的抑制作用,呈明显的时间和剂量依赖性,经不同质量浓度的构树叶总黄酮作用48 h后HepG-2凋亡率显著增加,药物组与对照组比较为(0.478±0.085 vs 0.498±0.014;0.354±0.004 vs 0.498±0.014;0.218±0.075 vs 0.498±0.014)有显著性差异,P<0.05,抑癌基因Bcl-2表达量呈逐渐下降的趋势,促凋亡基因Bax表达量随着质量浓度的升高表达量呈现上升趋势。结论:构树叶总黄酮可以有效的抑制HepG-2的生长,诱导细胞凋亡,其诱导该细胞凋亡的作用可能是通过下调抑癌基因Bcl-2的表达,可为肝癌的生物学治疗提供新的方法。     

平调饮对原发性肝癌患者AFPmRNA、MAGE-1mRNA表达的影响

目的研究平调饮对原发性肝癌患者甲胎蛋白(AFP)mRNA、黑色素瘤抗原-1(MAGE-1)mRNA表达的影响,探讨平调饮对原发性肝癌的抑癌基质。方法原发性肝癌患者60例,随机分为治疗组和对照组,分别给予平调饮和华蟾素注射液,治疗2个疗程,采用RT-PCR技术检测原发性肝癌患者治疗前后外周血AFPmRNA、MAGE-1mRNA的表达,并取30例健康志愿者血样作为参考对照,结果用SPSS13.0软件统计。结果平调饮使原发性肝癌患者的AFPmRNA、MAGE-1mRNA表达明显降低,2组治疗前后比较差异均有统计学意义(P0.01),治疗后治疗组与对照组MAGE-1mRNA表达(灰度比)分别为0.07±0.01、0.13±0.02,组间比较差异有统计学意义(P0.01),治疗组作用优于对照组。结论平调饮能够明显降低原发性肝癌患者AFPmRNA、MAGE-1mRNA表达,对MAGE-1基因表达的降低作用优于对照组,说明抑制MAGE-1基因表达可能是平调饮抗肝癌机制的靶点之一。     

八角莽草酸诱导人肝癌细胞HepG-2凋亡及其机制研究

目的：研究八角莽草酸诱导人肝癌细胞HepG-2凋亡的作用和机制。方法：取对数生长期人肝癌HepG-2细胞,随机分为药物组和对照组,用0.125,0.5,1 g·L^-1不同浓度八角莽草酸作用人肝癌HepG-2细胞,采用MTT法测定莽草酸对HepG-2细胞增殖的影响;通过流式细胞仪检测在以上浓度的莽草酸对肝癌HepG-2细胞周期的影响;通过免疫细胞化学检测凋亡相关基因B细胞淋巴瘤白血病2（Bcl-2）、Bcl-2相关X蛋白（Bax蛋白）表达的改变。结果：MTT实验结果表明,各质量浓度0.125,0.5,1 g·L^-1的莽草酸对人肝癌HepG-2的生长具有显著的抑制作用（P<0.05）,呈现时间依赖性和剂量依赖性;流式结果表明莽草酸将人肝癌HepG-2细胞阻滞在G₁期,使细胞不能顺利地进入细胞DNA合成期S期,从而抑制了该细胞的增殖。免疫细胞化学检测凋亡相关基因Bcl-2蛋白表达明显减少、Bax表达明显增加;Bcl-2/Bax比例明显降低。结论：八角莽草酸在体外诱导人肝癌HepG-2细胞大量阻滞在G₁期,进入S期细胞减少,抑制细胞增殖,其作用可能通过降低Bcl-2/Bax比例来诱导细胞凋亡而实现的。     

刺五加皂苷脂质体的制备及对肝癌移植瘤的抑制作用

目的：制备刺五加皂苷脂质体并研究其对肝癌移植瘤的抑制作用。方法：采用薄膜分散-超声法制备刺五加皂苷脂质体并检测其理化性质，用流式细胞仪检测此栽药脂质体对HepG2肝癌细胞周期和凋亡的影响，并观察刺五加皂苷脂质体荷瘤小鼠的抑瘤作用。结果：所制备的脂质体封率为63．43％，刺五加皂苷脂质体组与游离刺五加皂苷组均使肝癌细胞G0／G1期和S期比例明显下降，并观察到细胞凋亡，高剂量刺五加皂苷脂质体组荷瘤小鼠的抑瘤率（62．21％）显著高于低剂量组（45．23％）和游离刺五加皂苷组（46．16％，P均〈0．05）。而低剂量刺五加皂苷脂质体组与游离刺五加皂苷组无明显差异（P〉0．05）。结论：刺五加皂苷脂质体能抑制肝癌细胞Hep G2增殖和诱导细胞凋亡。对小鼠肝癌移植瘤的生长有明显抑制作用。     

红景天苷对人肝癌HepG2细胞增殖及凋亡的影响简

 目的 观察红景天苷(salidroside)对人肝癌HepG2细胞增殖和凋亡的影响, 探讨其抗肿瘤的可能机制。方法 以体外培养的人肝癌HepG2细胞作为研究对象, 倒置显微镜观察红景天苷对肝癌细胞形态的影响;采用MTS法检测红景天苷对细胞生长的抑制作用;采用流式细胞仪检测细胞凋亡率;Western blot法检测Bcl-2、Bax、caspase-3、caspase-8的表达。结果 红景天苷能显著抑制肝癌细胞HepG2增殖并促进其凋亡, 下调细胞Bcl-2 表达, 上调Bax、caspase-3及caspase-8的蛋白表达量。结论 红景天苷在体外对人肝癌HepG2细胞具有显著的抑制增殖和促进凋亡作用, 其机制可能与其调节凋亡基因Bcl-2、Bax、caspase-3与caspase-8的蛋白表达有关。     

中药治疗原发性肝癌中晚期的药味频率分析

对 1990— 2 0 0 0年国内公开发表的 6 6篇中医药治疗中晚期原发性肝癌的临床报道进行了用药频率的统计分析 ,结果表明 :中晚期原发性肝癌治疗用药中 ,健脾益气、活血祛瘀、清热解毒、清热燥湿和补阴类的使用率较高。茯苓、白术、柴胡、八月札和黄芪等健脾理气药的使用频率分别为 79%、71%、71%、4 3%和 4 3% ;丹参、当归、莪术、延胡索和郁金等活血祛瘀药的使用频率依次为 86 %、6 4 %、6 4 %、5 0 %和 5 0 % ;白花蛇舌草和半枝莲在气滞血瘀、肝郁脾虚、肝肾阴虚证中的使用频率分别为 5 7%和 36 %、36 %和 2 9%、2 9%和 14 % ,是常用的基本抗癌药味 ;生地、丹皮、鳖甲、龟板和知母等滋补肝肾药的使用频率依次为 71%、5 7%、5 0 %、4 3%和 4 3%     

Activation of Caspase‐9/3 and Inhibition of Epithelial Mesenchymal Transition are Critically Involved in Antitumor Effect of Phytol in Hepatocellular Carcinoma Cells

This study was designed to investigate the antitumor mechanism of Phytol in hepatocellular carcinomas including Huh7 and HepG2 cells in association with caspase dependent apoptosis and epithelial mesenchymal transition (EMT) signaling. Phytol significantly suppressed the viability of Huh7 and HepG2 cells. Also, Phytol significantly increased the sub G1 population and terminal deoxynucleotidyl transferase deoxyuridine triphosphate nick end labeling (TUNEL) positive cells in a concentration dependent manner in Huh7 and HepG2 cells. Consistently, Phytol cleaved poly (adenosine diphosphate‐ribose) polymerase (PARP), activated caspase‐9/3, and Bax attenuated the expression of survival genes such as Bcl‐2, Mcl‐1, and c‐Myc in Huh7 and HepG2 cells. Of note, Phytol also suppressed typical morphology change of EMT such as loss of cell adhesion and formation of fibroblast like mesenchymal cells in HepG2 cells. Furthermore, Phytol also reversed the loss of E‐cadherin and overexpression of p‐smad2/3, alpha‐smooth muscle actin, and Snail induced by EMT promoter transforming growth factor beta1 in HepG2 cells. Overall, our findings suggest that Phytol exerts antitumor activity via apoptosis induction through activation of caspas‐9/3 and inhibition of EMT in hepatocellular carcinoma cells as a potent anticancer candidate for liver cancer treatment. Copyright © 2015 John Wiley & Sons, Ltd.     

刺五加皂苷脂质体的制备及对肝癌移植瘤的抑制作用

目的:制备刺五加皂苷脂质体并研究其对肝癌移植瘤的抑制作用。方法:采用薄膜分散-超声法制备刺五加皂苷脂质体并检测其理化性质,用流式细胞仪检测此载药脂质体对HepG2肝癌细胞周期和凋亡的影响,并观察刺五加皂苷脂质体荷瘤小鼠的抑瘤作用。结果:所制备的脂质体封率为63.43%,刺五加皂苷脂质体组与游离刺五加皂苷组均使肝癌细胞G0/G1期和S期比例明显下降,并观察到细胞凋亡,高剂量刺五加皂苷脂质体组荷瘤小鼠的抑瘤率(62.21%)显著高于低剂量组(45.23%)和游离刺五加皂苷组(46.16%,P均<0.05),而低剂量刺五加皂苷脂质体组与游离刺五加皂苷组无明显差异(P>0.05)。结论:刺五加皂苷脂质体能抑制肝癌细胞Hep G2增殖和诱导细胞凋亡,对小鼠肝癌移植瘤的生长有明显抑制作用。