4,5,7-三羟基异黄酮对绒癌耐药细胞株JAR/MTX增殖、凋亡和侵袭的影响及相关机制

目的：研究4,5,7-三羟基异黄酮（genistein）对绒癌耐药细胞株JAR/MTX增殖、凋亡和侵袭能力的影响，并探讨其影响侵袭的相关机制。方法： 分别采用MTT法、Annexin-Ⅴ和PI双染法、transwell 小室法，检测不同浓度genistein 作用于JAR/MTX细胞72 h后细胞增殖、凋亡和侵袭能力的变化。采用RT-PCR技术检测雌激素受体（ER）以及与侵袭有关的MTA3、Snail基因mRNA的表达，采用蛋白印迹法和明胶酶谱法检测E-钙黏附蛋白（E-cadherin）和基质金属蛋白酶2（MMP-2）和9(MMP-9)蛋白的表达。结果： Genistein能抑制JAR/MTX细胞的增殖和侵袭能力，并呈剂量依赖关系。小剂量genistein（10 μmol/L）仅能引起少部分JAR/MTX细胞凋亡，而25、50、100 μmol/L genistein则引起大量细胞凋亡和坏死。JAR/MTX细胞经genistein作用后，ERβ和MTA3的mRNA表达量多于对照组，Snail基因的mRNA表达量少于对照组。E-cadherin的蛋白表达大于对照组，MMP-2和MMP-9的蛋白表达量少于对照组。结论： Genistein能抑制JAR/MTX细胞的增殖，诱导细胞凋亡和坏死，通过上调E-cadherin和下调MMP-2以及MMP-9的表达、抑制JAR/MTX细胞的侵袭能力，MTA3→Snail→E-cadherin通路可能是genistein抑制JAR/MTX细胞侵袭的信号通路之一。     

17-烯丙胺基-17-去甲氧基格尔德霉素对人绒毛膜癌JAR细胞系细胞周期和凋亡的影响及其相关机制

目的 探讨热休克蛋白 90（HSP90）抑制剂17-烯丙胺基-17-去甲氧基格尔德霉素（17-AAG）对人绒毛膜癌JAR细胞系细胞周期和凋亡的影响及其相关机制。 方法 体外培养人绒毛膜癌JAR细胞系,经不同浓度的17-AAG作用24 h后,采用TUNEL细胞凋亡法及Annexin V-FITC/PI双标记流式细胞术检测细胞凋亡;流式细胞术检测细胞周期;Real-time PCR法和Western blotting法检测血管内皮生长因子（VEGF）、cyclinD1、cyclinA1和 Caspase-3在mRNA和蛋白水平的表达情况。 结果 17-AAG对JAR细胞生长具有明显的抑制作用,并存在浓度依赖性。各组细胞发生G₂期阻滞及明显凋亡;5、10、20 mg/L 17-AAG 作用24 h 后,各组细胞增殖相关基因cyclinD1 mRNA及蛋白表达水平相对于0 mg/L 17-AAG处理组（对照组）均下调,VEGF蛋白表达水平相对于0 mg/L 17-AAG处理组（对照组）下调,且下调程度与处理浓度成正比,而凋亡相关基因Caspase-3的mRNA未出现明显上调,但其在蛋白表达水平上调。 结论 17-AAG能够抑制JAR细胞增殖活力,诱导细胞凋亡,17-AAG 可能通过下调VEGF 的表达,产生抗肿瘤血管新生作用;可能通过下调cyclinD1使细胞周期发生G₂期阻滞;且可能通过上调Caspase-3诱导细胞凋亡。     

二氢杨梅素预干预对人肺癌A549细胞放射治疗的敏感性作用

目的探索二氢杨梅素(DMY)对人肺腺癌A549细胞放射治疗敏感性的调节作用,及新的肺癌放疗增敏剂。方法采用MTT法和集落形成实验分别寻找二氢杨梅素对A549细胞的短期和长期20%抑制浓度(IC20)作为放疗增敏浓度;流式细胞术周期实验检测二氢杨梅素(IC20)作用不同时间对A549细胞周期时相的改变;集落形成实验检测二氢杨梅素(IC20)预干预24h后再照射对肺癌A549细胞放疗敏感性的影响。结果 MTT和集落形成实验均显示,DMY对A549细胞以浓度依赖形式存在短期和长期的抑制作用,MTT实验时IC20为40mg/L,集落形成实验时IC20为7mg/L;流式细胞术周期实验结果显示,二氢杨梅素作用24h时G2/M期比率增高明显(P0.05);集落增敏实验结果显示,DMY预处理24h后对A549细胞的放射治疗并未见到显著增敏作用(P0.05)。结论二氢杨梅素体外存在抑制A549细胞增殖的作用,其效应与药物浓度和细胞初始接种密度有关;二氢杨梅素作用24h可以使A549细胞G2/M期比率明显增加,但是单纯通过调整放疗前细胞周期时相并未见到明显的放疗增敏作用。     

芹菜素对喉癌Hep-2细胞增殖、迁移与侵袭的影响

目的探讨芹菜素对喉癌Hep-2细胞增殖、迁移与侵袭的影响及可能机制。方法 MTT法检测不同浓度的芹菜素(0、20、40、80μmol/L)对喉癌Hep-2细胞增殖的影响。40μmol/L芹菜素处理Hep-2细胞48h后,Transwell实验检测Hep-2细胞体外迁移和侵袭能力变化;实时PCR和Western blot检测Hep-2细胞Wnt1、β-catenin、环氧合酶2(COX2)与基质金属蛋白酶2(MMP-2)的蛋白与mRNA的表达水平。结果芹菜素抑制喉癌Hep-2细胞增殖,并呈时间浓度依赖性;40μmol/L芹菜素处理Hep-2细胞48h能够有效抑制Hep-2细胞的迁移和侵袭能力,降低Wnt1、β-catenin、COX2与MMP-2 mRNA相对表达量和蛋白表达水平。结论芹菜素抑制喉癌细胞的增殖、迁移和侵袭能力与抑制喉癌Hep-2细胞中Wnt/β-catenin信号通路相关。     

人绒毛膜促性腺激素诱导JEG-3细胞TGF-β3的表达

目的:探讨人绒毛膜促性腺激素（hCG）对绒癌细胞系表达转化生长因子（TGF-β3）的影响。方法:以绒癌细胞来源的JEG-3细胞系为研究对象,采用半定量逆转录多聚酶链反应（RT-PCR）方法,观察HCG对JEG-3细胞表达TGF-β3　mRNA的影响响。结果:分别用0、50、500、5000、25000 mU/ml　hCG处理48h后,JEG-3细胞中TGF-β3　mRNA的含量逐渐被诱导增多,并表现出一定的浓度效应——随hCG作用浓度增高而显著;另外,分别检测受25 000mU/ml hCG处理0、6、12、24、30、36、48h的JEG-3细胞中TGF-β3 mRNA的表达情况,发现TGF-β3表达受hCG的诱导在30h时最强,之后逐渐减弱。结论:hCG可能通过调节TGF-β3在滋养细胞或滋养细胞来源的绒癌细胞中的表达,进而影响细胞的浸润转移。     

麦冬皂苷B对前列腺癌PC-3细胞增殖、侵袭和迁移的影响

目的 探讨麦冬皂苷B对前列腺癌PC-3细胞增殖、侵袭和迁移的影响及可能机制.方法 体外培养PC-3细胞,分别以5、10、20μmol/L麦冬皂苷B处理后,MTT实验检测PC-3细胞增殖能力;Transwell实验检测PC-3细胞迁移和侵袭能力;流式细胞术检测PC-3细胞的细胞周期变化及细胞凋亡水平;Western blot检测细胞周期蛋白Dl(cyclin D1)和基质金属蛋白酶-2/9(matrix metalloproteinase-2/9,MMP-2/9)的表达.结果 不同浓度麦冬皂苷B处理后,PC-3细胞的细胞增殖能力、迁移和侵袭能力降低(P＜0.01);G0/G1期细胞比例与细胞凋亡率明显升高(P＜0.01);PC-3细胞cyclinD1、MMP-2与MMP-9的表达水平均明显降低(P＜0.01).结论 麦冬皂苷B抑制人前列腺癌PC-3细胞增殖、侵袭及迁移,促进凋亡.     

力生长因子E肽对前交叉韧带成纤维细胞活力、迁移与侵袭的影响

目的研究力生长因子(mechano-growth factor,MGF)E肽对前交叉韧带(anterior cruciate ligament,ACL)成纤维细胞活力、迁移与侵袭的影响。方法以ACL成纤维细胞为研究对象:(1)经不同浓度(0、10和100μg/L)MGF E肽处理细胞24 h后,去除培养基,换成1%血清浓度DMEM低糖培养基培养6和30 h后,检测细胞活力、DNA含量、细胞凋亡、基质金属蛋白酶-2(matrix metalloproteinases-2,MMP-2)和基质金属蛋白酶-9(MMP-9)活性变化及I型胶原(COL I)、III型胶原(COL III)mRNA表达;(2)使用不同浓度(0、5、10、20、50和100μg/L)MGF E肽处理ACL成纤维细胞48 h后,检测细胞活力与MMP-2活性,并利用划痕实验与Transwell实验分别检测细胞迁移与侵袭能力。结果 (1)6 h时,10μg/L浓度MGF E肽显著促进MMP-2、MMP-9活性,对细胞活力、增殖、凋亡及COL I、COL III mRNA表达无影响。100μg/L浓度MGF E肽显著促进MMP-2、MMP-9活性,并提高了COL I、COL III mRNA表达,但对细胞活力、增殖、凋亡无影响。30 h时,10μg/L浓度MGF E肽显著促进MMP-9活性及COL I、COL III mRNA表达,对细胞活力、增殖、MMP-2活性及细胞凋亡无影响。100μg/L浓度MGF E肽显著促进MMP-9活性及COL III mRNA表达,但对细胞活力、增殖、MMP-2活性、细胞凋亡、COL I mRNA表达无显著性调控作用。(2)MGF E肽显著促进ACL成纤维细胞的迁移与侵袭,且呈一定程度浓度依赖性;迁移与侵袭过程可能依赖于MMP-2活性。结论 MGF E肽能够促进ACL成纤维细胞胞外基质的合成与降解,进一步提高了细胞的迁移与侵袭,有助于组织损伤修复过程中成纤维细胞向损伤部位迁移,对ACL组织修复再生与术后康复具有积极的调控作用。     

苦参碱通过TLR3下调PI3K/Akt通路抑制子宫肌瘤细胞的增殖、侵袭和迁移北大核心CSCD

目的:探讨苦参碱抑制子宫肌瘤细胞凋亡、侵袭和迁移的机制。方法:将子宫肌瘤细胞分为对照组(不做任何处理)、苦参碱低、中、高剂量组(分别用0.5、1.0、2.0 mg/ml的苦参碱处理)、pcDNA3.1/TLR3质粒(TLR3)+高剂量苦参碱组(2.0 mg/ml苦参碱处理)、NC组(转染空质粒+2.0 mg/ml苦参碱处理)。RT-qPCR检测各组细胞TLR3、PI3K mRNA表达;CCK-8法检测各组细胞存活率;流式细胞术检测细胞凋亡;划痕实验检测各组细胞迁移;Transwell检测各组细胞侵袭能力;Western blot检测各组细胞TLR3、PI3K、p-Akt、MMP-2、MMP-9蛋白表达。结果:与对照组相比,苦参碱低、中、高剂量组TLR3 mRNA、PI3K mRNA、TLR3、PI3K、p-Akt、MMP-2、MMP-9表达及细胞增殖、迁移和侵袭能力降低,凋亡率升高,差异有统计学意义(P<0.05);与苦参碱高剂量组相比,TLR3+苦参碱高剂量组TLR3 mRNA、PI3K mRNA、TLR3、PI3K、p-Akt、MMP-2、MMP-9表达与细胞增殖、迁移和侵袭能力提高,细胞凋亡率降低,差异有统计学意义(P<0.05),TLR3-NC+苦参碱高剂量组与苦参碱高剂量组TLR3 mRNA、PI3K mRNA、TLR3、PI3K、p-Akt、MMP-2、MMP-9表达、细胞增殖、凋亡、迁移和侵袭能力差异无统计学意义(P>0.05)。结论:苦参碱通过下调TLR3表达下调P13K/Akt通路,抑制子宫肌瘤细胞增殖、侵袭和迁移。     

冬凌草甲素对人肺癌NCI-H460细胞侵袭和迁移的影响

 目的：研究冬凌草甲素对人肺癌NCI-H460细胞侵袭和迁移的影响。方法：将NCI-H460细胞分为高剂量（HD）组、中剂量（MD）组、低剂量（LD）组和对照（N）组,前3组（实验组）加入不同浓度的冬凌草甲素,N组不加冬凌草甲素,观察细胞生长情况;用MTT法测定细胞增殖;比较细胞侵袭能力和迁移能力;Western blotting检测细胞MMP-2和MMP-9表达。结果：实验组细胞数量低于对照组,细胞增殖受抑制,HD组抑制率为48.94%,MD组为36.17%,LD组为19.15%;实验组穿透滤膜细胞数明显减少,HD组为26.67±5.16,MD组为36.17±5.08,LD组为44.33±5.50;实验组的迁移速率及迁移细胞数均降低;实验组的MMP-2和MMP-9表达水平明显低于N组（P<0.01）。结论：冬凌草甲素能抑制NCI-H460肺癌细胞的侵袭和迁移,其作用与下调MMP-2和MMP-9表达有关。     

紫草素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响

目的探讨紫草素对人膀胱癌T24细胞增殖、凋亡、迁移与侵袭的影响及可能机制。方法将人膀胱癌T24细胞分为空白对照组与紫草素组(10、20、40μmol/L)。不同浓度紫草素干预48h后,MTT方法检测T24细胞的增殖活力,流式细胞术检测T24细胞的凋亡率。40μmol/L紫草素干预48 h后,Transwell实验检测紫草素对T24细胞迁移与侵袭能力的影响;Western blot实验检测T24细胞中半胱氨酸天冬氨酸蛋白水解酶3/9(Caspase-3/Caspase-9)与基质金属蛋白酶2/9(MMP-2/MMP-9)的表达。结果不同浓度紫草素均能显著抑制T24细胞增殖,并促进细胞凋亡,且呈浓度依赖性(P0.01)。40μmol/L紫草素干预48 h后,T24细胞迁移与侵袭能力显著降低,T24细胞中Caspase-3、Caspase-9、MMP-2与MMP-9的蛋白表达水平均显著升高(P0.01)。结论紫草素能够抑制膀胱癌T24细胞增殖、迁移与侵袭,并促进凋亡。     

二氢杨梅素联合依托泊苷对绒毛膜癌细胞JAR的抑制作用

目的 探讨二氢杨梅素（DMY）联合依托泊苷（VP16）对绒毛膜癌细胞JAR的抑制作用及其相关机制。方法 体外培养JAR细胞,设空白对照组、DMY组、VP16组以及DMY与VP16联合（DMY+VP16）组。MTT法检测各组细胞增殖情况;Annexin V-FITC/PI双染流式细胞术分析各组细胞的凋亡率;克隆形成实验检测细胞生存能力;Western blotting法检测凋亡抑制蛋白Bcl-2、细胞凋亡抑制蛋白2（c-IAP2）表达水平。 结果 MTT检测结果显示,与空白对照组比较,DMY组、VP16组及DMY+VP16组在24 h和48 h时间点的细胞存活率均下降,且DMY+VP16组细胞存活率下降最为明显;Annexin V-FITC/PI双染流式细胞术结果显示,与对照组相比各实验组凋亡率均有增高,DMY+VP16组凋亡率明显高于各单独用药组;克隆形成实验结果显示,对于JAR细胞,实验组的克隆球数目均少于对照组,且DMY+VP16组克隆球数目最少;对于正常肝脏HL7702细胞,DMY组与对照组相比无明显差异,VP16组与DMY+VP16相比亦无明显差异;Western blotting实验结果显示,与对照组相比,无论DMY和VP16单独还是联合使用均可下调Bcl-2、c-IAP2蛋白表达,同时DMY+VP16组下调作用最明显。 结论 二氢杨梅素联合依托泊苷明显增强对绒毛膜癌细胞JAR的生长抑制作用,联合使用可以减少化疗药物VP16的用量,其抑制肿瘤细胞作用可能与下调Bcl-2、c-IAP2蛋白的表达有关。     

IFNgamma pretreatment sensitizes human choriocarcinoma cells to etoposide-induced apoptosis

Choriocarcinoma is a malignant trophoblast-derived tumour, which can arise in any type of gestation. Cell proliferation assays showed that interferon gamma (IFNgamma) alone significantly inhibited proliferation of choriocarcinoma JAR and JEG-3 cells. TdT (terminal deoxynucleotidyl transferase)-mediated dUDP nick-end labelling (TUNEL) assays and Hoechst staining indicated that IFNgamma alone could not induce apoptosis of JAR and JEG-3 cells, but IFNgamma could enhance the sensitivity of JAR cells to etoposide-induced apoptosis. RT-PCR and western blotting were performed to detect expression of apoptosis-related molecules IFNgammaR, interferon regulatory factor-1 (IRF-1), p53 and pro-caspase 3. In JAR cells, etoposide increased expression of the proteins including IFNgammaR, p53 and pro-caspase 3 as well as IRF-1 mRNA and IFNgamma-pretreatment apparently promoted up-regulation of these molecules expression. In addition, the responses of IRF-1, p53 and pro-caspase 3 expression to IFNgamma pretreatment were dose dependent. IRF-1 knock down assays demonstrated that IRF-1 directly mediated IFNgamma pretreatment enhanced sensitivity of JAR cells to etoposide-induced apoptosis and that pro-caspase 3 was one of the target genes of IRF-1.     

Osteopontin facilitates invasion in human trophoblastic cells via promoting matrix metalloproteinase-9 in vitro

Successful implantation of embryo and placentation depend on proper trophoblast proliferation and differentiated into specialized invasive trophoblast. However, little is known about the regulatory factors and mechanisms in trophoblast proliferation and differentiation. Osteopontin (OPN) is a member of the small integrin-binding ligand N-linked glycoprotein family and participates in cell adhesion and invasion. It has been identified that OPN is highly expressed in invasive trophoblasts in human placenta. In this study, we demonstrated that OPN is constitutively expressed in highly invasive phenotype of human choriocarcinoma cell lines of JAR and JEG-3 cells, and OPN could promote trophoblast proliferation and invasion, partly through promoting MMP-9 secretion. Inhibition of OPN will compromise the abilities of proliferation and invasion in JAR and JEG-3 cell lines. Our data showed that the expression of OPN in trophoblast may participate in placentation, OPN expression defects may be involved in gestational trophoblastic diseases.     

人绒毛膜促性腺激素对JEG-3细胞表达VEGF的影响

目的: 揭示人绒毛膜促性腺激素(hCG)对滋养层细胞表达血管内皮生长因子(VEGF)的影响。方法: 以滋养层细胞来源的JEG-3细胞系为研究对象,采用半定量逆转录多聚酶链反应(RT-PCR)方法检测VEGFmRNA的表达。结果: 分别用(0、50、500、5000、25000)U/LhCG处理48h后,JEG-3细胞中VEGF的表达被诱导增高,且包括VEGF₁₂₁、VEGF₁₆₅、VEGF₁₈₉在内的VEGF亚型均受到诱导。另外,观察VEGF在25000U/LhCG处理的JEG-3细胞中表达的时间变化,结果发现VEGF在JEG-3细胞中的表达在经过短暂的诱导后略降低。结论: hCG可能通过调节VEGF在滋养层细胞或滋养层细胞来源的绒癌细胞中的表达,进而影响细胞的增殖、迁移或浸润转移。     

卡莫氟对人子宫颈癌细胞系HeLa增殖及侵袭的影响及机制

目的 探讨卡莫氟（carmofur）对人子宫颈癌细胞增殖、侵袭的影响及其机制。 方法 将卡莫氟配置成不同浓度（0.4、0.8和1.2 mg/L）作用宫颈癌HeLa细胞,并设置对照组。使用细胞计数试剂盒8（CCK-8）法检测细胞情况,用Transwell实验检测细胞侵袭情况,通过Western blotting和Real-time PCR法检测基质金属蛋白酶7（MMP-7）、β-连环蛋白（β-catenin）和连环蛋白P120（P120 ctn）和mRNA的表达水平。 结果 与对照组相比,药物处理组随卡莫氟浓度的上升,细胞增殖能力降低,卡莫氟作用24 h即可抑制细胞增殖,且随着作用时间的延长,细胞增殖速率显著降低（均P<0.05）。与对照组相比,卡莫氟组可抑制HeLa细胞的侵袭（P<0.05）。与对照组相比,卡莫氟组可降低MMP-7、β-catenin和P120ctn蛋白水平和mRNA水平（P<0.05）。结论 卡莫氟能抑制HeLa细胞的增殖、侵袭,其机制可能与下调MMP-7、β-catenin和P120ctn表达水平有关。     

Invasion of Cytotrophoblastic (JEG-3) Cells Is Up-Regulated by Interleukin-15 In Vitro

PROBLEM: Trophoblast invasion into the uterus is controlled by many factors. Some cytokines (interleukin [IL]-1, IL-6, and IL-10) have been shown previously to play an important role in placentation. The human placenta is an important source of IL-15, although the cellular source of IL-15 in the placenta has not yet been specified. IL-15 influences cell adhesion and migration by redistributing adhesion molecules in lymphocytes and has been shown to have effects on endothelial cells and in some human tumors. METHOD OF STUDY: To study the role of IL-15 in trophoblast invasion, we investigated the effect of IL-15 (concentrations, 1–10 ng/ml) in a trophoblast invasion model (JEG-3 with matrigel-coated filters). Cell invasion was assessed using matrigel-coated filters and was expressed as the quotient of invading cells in comparison with the number of cells that had passed the control membrane. Cell migration was studied by examining the number of cells that had passed the filters without matrigel. Cell proliferation was quantified by a tetrazolium salt WST-1 cleavage assay. Matrix metalloproteinase (MMP)-1, MMP-2, and MMP-9 activities were measured by specific enzyme assays. RESULTS: IL-15 significantly (P < 0.05) increased the in vitro invasion of cytotrophoblastic (JEG-3) cells in a dose-dependent manner. There was a fourfold increase in the invasion at a concentration of 10 ng/ml of IL-15. Migration also was increased by a factor of 2.3 (P < 0.05). Cell proliferation, however, remained unchanged. The collagenolytic activity of cytotrophoblastic (JEG-3) cells was increased by IL-15 stimulation. A significant increase in MMP-1 concentration occurred after the incubation of JEG-3 cells with IL-15. No changes appeared in MMP-2, MMP-9, and tissue inhibitor of metalloproteinase-1 concentrations. CONCLUSIONS: Trophoblast invasion and migration, but not proliferation, are enhanced by IL-15. Our results suggest a role for IL-15 in the modulation of MMP-1 secretion by JEG-3 cells. Furthermore, we speculate, that IL-15 might be related to the changes of cell adhesion molecule phenotype during the process of invasion.     

纳米雄黄对肺癌A549细胞增殖、凋亡及迁移的影响

BACKGROUND: Studies have found that realgar has anti-tumor effect, but its effect on proliferation, apoptosis and migration of A549 lung cancer cells is rarely reported. OBJECTIVE: To study the effect of nano-realgar on A549 lung cancer cell proliferation, apoptosis and migration. METHODS: Cultured A549 lung cancer cells were seeded onto 6-well culture plates containing 100 mg/L nano-realgar (experimental group) or normal saline (control group). Cell growth was observed under microscope for 48 hours. Cell proliferation and apoptosis were detected using MTT assay (24, 48, 72 hours of culture) and flow cytometry (24 and 48 hours of culture), respectively. Integrin β1 and cadherin expression was detected using immunohistochemical method at 24 hours of culture. RESULTS AND CONCLUSION: (1) Cell growth. In the experimental group, shrunk cells that were round or oval-shaped were scattered, and cell number was reduced. In the control group, adherent cells characterized by big size, abundant cytoplasm and fusiform shape grew vigorously. Moreover, some cells were fused into pieces. (2) Cell proliferation. The absorbance values of cells were significantly lower in the experimental group than the control group at different time (P < 0.05), while the cell growth inhibition ratio was higher in the experimental group than the control group (P < 0.05). (3) Cell apoptosis. The end-stage apoptotic rate and total apoptotic rate of cells were both higher in the experimental group than the control group (P < 0.05). (4) Immunohistochemical detection. The A549 cell surface integrin β1 and cadherin positive densities were significantly lower in the experimental group than the control group (P < 0.05). Taken together, the nano-realgar can inhibit the proliferation, invasion and metastasis, and induce apoptosis in A549 cells.     

穿心莲内酯对人皮肤基底细胞癌A431细胞生长、凋亡及增值细胞核抗原蛋白表达的影响

目的 探讨穿心莲内酯（AD）对人皮肤基底细胞癌A431细胞生长、凋亡及增殖细胞核抗原（PCNA）蛋白表达的影响。方法 应用酸性磷酸酶（APA）法检测细胞增殖抑制率,荧光显微镜观察细胞形态,Annexin V-FITC/PI双染法、流式细胞术（FCM）检测细胞凋亡率, Rh123染色FCM检测细胞线粒体膜电位,免疫细胞化学法检测细胞PCNA蛋白表达。结果AD呈时间、剂量依赖性抑制A431细胞生长增殖;且同一时间点50mg/L、100mg/L AD组与溶媒对照组相比差异显著（P＜0.05）。AD组作用A431细胞24h时,部分细胞核染色质出现典型凋亡形态学改变。不同浓度AD作用A431细胞24h,早期凋亡率、晚期凋亡及坏死率均随AD浓度升高而逐渐增加,且50mg/L、100mg/L AD组与溶媒对照组相比差异显著（P＜0.05）。AD作用A431 24h细胞内PCNA蛋白随AD浓度升高表达逐渐减少。AD作用A431细胞24h后,线粒体膜电位下降明显,与溶媒对照组相比较,50mg/L、100mg/L AD组差异有统计学意义（P＜0.05）。结论 AD可明显抑制A431细胞生长增殖,其抑制细胞增殖可能与下调PCNA蛋白表达有关。AD能诱导A431细胞凋亡,其凋亡机制可能与细胞线粒体膜电位下降有关。