高糖培养的系膜细胞肥大与周期素激酶抑制剂p27的关系

目的：研究周期素激酶抑制剂p27在高糖培养系膜细胞（MC）肥大中的作用。方法：蛋白印迹（western杂交）方法测定MC裂解液P27蛋白水平,[^3H]TdR）及[^3H]leu)掺入方法测定MC细胞的肥大情况,观察P27反义寡核苷酸（ODN）转染对高糖培养MC肥大的影响。结果：高糖（450mg/dl)无血清培养的MC同正常糖（100mg/dl)无血清培养的MC相比,P27水平增高,[^3H]leu掺入增加,[^3H]TdR掺入减少;p27反义ODN转染后高糖无血清培养MC[^3H]leu掺入减少,[^3H]TdR掺入增加,用甘露醇提高正常培养液渗透压并不增加MC中p27水平,结论：高糖培养的MC中P27水平明显增高,增高的P27在高糖培养MC细胞肥大中起重要作用。     

血管紧张素Ⅱ受体1及周期素激酶抑制剂p27在血管紧张素Ⅱ诱导系膜细胞肥大中的作用

目的：在周期素激酶抑制剂p27和血管紧张素Ⅱ受体1（AT1）水平,研究血管紧张素Ⅱ(AngⅡ）诱导系膜细胞（MC）肥大的分子机制。方法：用蛋白印迹（western杂交）方法测定MC中p27蛋白水平,用[^3H]胸腺嘧啶核苷[^3H]TdR)及[^3H]leu掺入方法测定MC的肥大情况,观察p27反义寡苷酸（ODN）转染对MC肥大程度的影响。用ELISA方法测定MC中细胞外基质（ECM）蛋白（Ⅳ型原及纤维连接蛋白）结果：AngⅡ使无血清培养MC中p27增多,[^3H]leu掺入增加,[^3H]TdR掺入减少,MC中ECM水平增高,p27反义ODN转染使AngⅡ的上述作用减弱;氯沙坦可降低AngⅡ刺激的MC中的p27水平,减少[^3H]leu掺入,增加[^3H]TdR掺入,降低MC中的ECM水平,且上述作用呈剂量依赖性。结论：AngⅡ通过AT1受体可提高p27水平,诱导MC细胞肥大,而氯沙坦可减轻AngⅡ诱导的MC细胞肥大程度。     

辛伐他汀抑制血管平滑肌细胞增殖及对PTEN、p27蛋白表达的影响

目的：观察辛伐他汀（simvastatin）对血管平滑肌细胞（VSMC）增殖的抑制作用及其对细胞周期和周期蛋白依赖性激酶抑制物p21、p27，细胞G1－S期转换重要调节基因PTEN、c-myc蛋白表达的影响，并进一步观察simvastatin是否通过抑制脂质代谢的中间产物－甲羟戊酸的合成而上调PTEN、p27蛋白的表达及PTEN和p27是否存在上下游关系。方法：[^3H]－胸腺嘧啶核苷酸（[^3H]-TdR）掺入测定VSMC DNA合成，流式细胞仪检测细胞周期情况，Western印迹杂交法检测p21、p27及PTEN、c-myc蛋白表达，人工合成PTEN反义寡核苷酸，并以正义寡核苷酸为对照，以脂质体介导转染细胞，以Western印迹杂交流检测转染效率并观测其对PTEN、p27蛋白表达的影响。结果：simvastatin以剂量依赖关系抑制血清诱导的VSMC[^3H]-胸腺嘧啶核苷酸掺入，使G0／G1期细胞比例明显增多，S期细胞比例显减少，并上调p27及信号通路中常位于p27上游的PTEN的蛋白表达，但不影响p21、c-myc蛋白表达，PTEN反义寡核苷酸下调PTEN蛋白的表达后并不影响p27蛋白表达，200μmol/L甲羟戊酸能显抑simvastatin诱导的PTEN、p27蛋白表达升高。结论：simvastatin能抑制VSMC增殖，使细胞周期停滞于G0／G1期，这一过程可能通过不同的信号途径分别上调PTEN、p27这两个调控G1－S周期转换的基因而实现，而非通过PTEN－p27这一经典通路，simvastatin对PTEN、p27的调节与其抑制甲羟戊酸的合成有关。     

核因子—kB反义寡核苷酸对系膜细胞炎症因子基因表达的影响

目的：探讨NF－kB反义寡核苷酸（oligodeoxynucleotide,ODN)对人肾小球系膜细胞炎症因子表达的影响，为利用NF－kB反义ODN治疗肾小球炎性病变奠定基础。方法：人工合成p65反义、正义及错配ODN并行全程硫代磷酸化修饰。应用核酸酶保护法观察阳离子脂质体介导的不同浓度的ODN（0．001、0．01、0．1、1、10μmol/L)对系膜细胞TNF－α、IL－1α、IL－1β、MCP－1、IL－8、TGF－β1 mRNA表达的影响，以正义ODN（10μmol/L)及错配ODN（10μmol/L)作为对照组。结果：正常培养状态下，系膜细胞可组成型表达TNF－α、IL－1β、IL－8和TGF－β1 mRNA，而不表达IL－1α和MCP－1 mRNA。细菌脂多糖（lipopolysaccharide,LPS)刺激后上述6种炎症因子表达显著上调。p65反义ODN可呈剂量依赖性地抑制LPS诱导的系膜细胞炎性细胞因子TNF－α，IL－α，IL－1β，MCP－1和IL－8的基因表达，而对TGF－β1无显著抑制作用；p65正义及错配ODN均不能抑制炎性细胞因子的表达。结论：p65反义ODN可明显抑制LPS诱导的肾小球系膜细胞炎性细胞因子的表达，提示NF－kB在肾小球疾病进展中起关键性调控作用，其反义ODN有可能应用于肾脏病变的实验性治疗之中。     

周期素激酶抑制剂p27在氟伐他汀抑制系膜细胞增生中的作用

系膜细胞 (MC)增生是肾脏疾病的常见病理现象 ,细胞增生与否受细胞周期调节蛋白 (CCRPs)控制[1] ,其中周期素激酶抑制剂 p2 7是一种十分重要的CCRPs,研究证实 ,p2 7水平下降在MC增生中起重要作用[1 3 ] 。氟伐他汀是一种三羟基三甲基戊二酰辅酶A(HMG CoA)还原酶抑制剂 ,可抑制MC增生[4] ,但目前尚不清楚氟伐他汀对MC增生及 p2 7水平的影响如何。本研究通过观察氟伐他汀能否抑制肿瘤坏死因子 (TNF)α诱导的MC增生及 p2 7在其中的作用 ,为防治系膜增生性肾炎提供理论依据。一、材料与方法1 细胞培养 :SD大鼠的MC培养于含 10 %小…     

梅毒患者细胞免疫的研究

目的：探讨T淋巴细胞亚群、可溶性白介素2受体和肿瘤坏死因子α在梅毒发病机制中的作用。方法：应用流式细胞仪和双抗体夹心ELISA法对86例梅毒患者Ｔ淋巴细胞亚群（CD3^ 、CD4^ 、CD8^ ）、可溶性白介素2受体（sIL-2R)及肿瘤坏死因子α（TNF－α）水平进行检测，并对其相关性进行分析。结果：梅毒患者CD4^ 及CD4^ ／CD8^ 比值明显低于正常人对照组（P＜0．01），CD8^ 显著高于正常人对照组（P＜0．05），而CD3^ 与正常人对照组无显著性差异（P＞0．05）；活动期梅毒CD4^ /CD8^ 比值低于恢复期（P＜0．05）。活动期梅毒及非活动期梅毒患者血清sIL-2R水平均明显增高（P＜0．01），且活动期高于非活动期（P＜0．01）。活动期梅毒患者血清TNF－α水平高于非活动期及正常对照组（P＜0．01），且活动期高于非活动期（P＜0．01）。活动期梅毒患者CD4^ 、CD8^ 与sIL-2R和TNF－α水平呈正、负相关。结论：本研究提示梅毒患者存在细胞免疫功能抑制现象，且T淋巴细胞功能的紊乱和TNF－α及sIL-2R水平的改变与梅毒的发病有密切关系。     

虫草菌丝和丹参对肝星状细胞活化、Ⅰ型胶原及转化生长因子β1mRNA与蛋白表达的影响

目的探讨虫草菌丝、丹参抗肝纤维化的作用机理。方法虫草菌丝与丹参流浸膏分别给大鼠经口灌胃给药后分离药物血清,观察药物血清对体外传代活化的大鼠肝星状细胞α－平滑肌肌动蛋白（SMactin,SMA）表达、[3H]TdR及[3H]脯氨酸掺入,TGFβ1、I型前胶原mRNA表达及其蛋白生成量的影响。结果丹参抑制HSC的SMA表达、I型胶原生成量及细胞内[3H]脯氨酸掺入的作用显著,分别为对照组的39.8％,42．7％与38．9％（P＜0．01;前2项显著低于虫草菌丝组,P＜0．05）,尚可抑制细胞1型前胶原＜mRNA,TGFβ1＜mRNA及其蛋白的表达（P＜0．01）;虫草菌丝对上述指标也均有抑制作用,以抑制TGFβ1＜mRNA及其蛋白表达的作用尤著,分别为对照组的47．7％和21．1%(P＜0．01）;显著低于丹参组,P＜0．05。结论丹参具有较强的抑制HSC活化与胶原合成的作用,抑制胶原合成主要作用于前胶原转录后的水平;虫草菌丝的主要作用点抑制HSC的TGFβ1mRNA表达与自分泌。     

外源性一氧化氮对高血压患者离体动脉平滑肌细胞的增殖作用研究

为探讨原发性高血压（EH）患者血管平滑肌细胞（VSMC）与一氧化氮（NO）的关系以及外源性NO对离体VSMC的增殖作用，采用EH患者肠系膜动脉分离、消化后进行离体VSMC培养。应用一氧化氮合成酶（NOS）诱导剂白细胞介素－1（IL－1）干预，检测NO水平，并用外源性NO药物硝普钠进行干预，研究其对VSMC摄入3H－胸腺嘧啶核苷（3H－TdR）的影响。结果：EH组VSMC释放的NO较正常血压（NT）组低（P＜0．01），IL－1诱导后NO明显增加（P＜0．01），但仍较NT组低（P＜0．05）。外源性NO药物硝普钠干预后3H－TdR掺入量随浓度的增高而减低，与对照组相比P＜0．01。提示：EH患者存在着NO产生通路的异常，外源性NO可抑制平滑肌细胞的增殖。     

全反式维甲酸对血管平滑肌细胞增生和细胞周期素依赖激酶抑制蛋白P27蛋白表达的影响

目的：探讨全反式维甲酸对细胞周期素依赖激酶抑制蛋白P27蛋白表达，血管平滑肌细胞DNA合成和增生的影响。方法：取Wistar大鼠胸主动脉血管平滑肌细胞培养，用^3H—TdR掺入率检测血管平滑肌细胞DNA合成和增生，用western—blotting印迹和图像分析方法检测细胞周期素依赖激酶抑制蛋白P27蛋白表达。结果：全反式维甲酸（2．5μmol／L）明显抑制胎牛血清（20％FBS）诱导的血管平滑肌细胞P27蛋白表达；全反式维甲酸明显抑制胎牛血清诱导的血管平滑肌细胞增生和DNA合成。结论：全反式维甲酸具有抗血管平滑肌细胞增生作用，其机制与促进P27蛋白表达有关。     

紫杉醇水蛭素复合物对兔血管平滑肌细胞和内皮细胞增殖与迁移的影响

目的观察不同浓度紫杉醇水蛭素复合物对兔血管平滑肌细胞（smooth musele cell,SMC）和内皮细胞（endothelial cell,EC）增生、迁移的影响。方法培养兔血管SMC和EC,建立细胞共培养体系,模拟紫杉醇水蛭素复合物对血管SMC及EC的作用方式,观察不同浓度紫杉醇水蛭素复合物对兔血管SMC及EC的DNA合成、增殖细胞核抗原（proliferating cell nuclear antigen,PCNA）蛋白表达的影响,测定不同浓度紫杉醇水蛭素复合物对血管SMC及EC的迁移率。结果溶剂对照组SMC及EC的氚-胸腺嘧啶脱氧核苷（^3H-TdR）掺入、PCNA蛋白表达、迁移与空白对照组相比差异均无显著性。大、中、小剂量紫杉醇水蛭素复合物呈浓度依赖地抑制SMC的^3H—TdR掺入、PCNA蛋白表达和迁移（n=6,P〈0．05）;在大、中剂量之间,紫杉醇水蛭素复合物呈浓度依赖地抑制EC的^3H—TdR掺入、PCNA蛋白表达和迁移（n=6,P〈0．05）;但在小剂量组紫杉醇水蛭素复合物对EC的^3H—TdR掺入、PCNA蛋白表达和迁移有抑制倾向,但与空白对照组相比差异均无显著性。结论小剂量的紫杉醇水蛭素复合物可显著抑制兔血管SMC的增生与迁移,但抑制EC的增生与迁移不明显。     

An antisense oligodeoxynucleotide to growth hormone messenger ribonucleic acid inhibits lymphocyte proliferation

The role of GH in lymphocyte proliferation was studied by examining the effect of an antisense oligodeoxynucleotide (ODN) complementary to GH mRNA. The results of these studies showed that antisense GH ODN treatment inhibits lymphocyte production of immunoreactive GH (irGH). Lymphocytes treated with the GH antisense ODN produced less irGH than did lymphocytes treated with control sense GH ODN. Antisense GH ODN-mediated inhibition of irGH production resulted in a decrease in lymphocyte proliferation. Cells with the antisense GH ODN had less (87%) incorporation of [3H]thymidine [( 3H]TdR) in both resting and Concanavalin-A-stimulated lymphocytes, whereas the incorporation of [3H]TdR in cells treated with a control ODN was not significantly affected. The effect of the antisense ODN on [3H]TdR incorporation was specific, since it could be reversed by hybridization competition with a complementary GH sense ODN or by the addition of exogenous rat GH. Collectively, the data indicate that lymphocytes synthesize and secrete irGH and that irGH produced by these cells can stimulate proliferation, suggesting that GH may play an autocrine/paracrine role in lymphocyte replication.     

Study on the mechanism of epidermal growth factor-induced proliferation of hepatoma cells

AIM: Many growth factors, such as epidermal growth factor(EGF), are associated with the carcinogenesis. EGF plays itsrole in the proliferation of hepatoma cells through bindingwith EGF receptor (EGFR) and a series of signal transduction.But the postreceptor pathway is still not clear. In the presentexperiment, we studied the effect of tyrosine kinase, proteinkinase C, Na+/H+ exchange, calmodulin and voltage-dependent Ca2+ channel on EGF-induced hepatoma cellproliferation.METHODS: Hepatoma cell line SMMC7721 was cultured inRPMI1640 serum-free medium. In order to study the effectof thyrosine kinase, protein kinase C, Na+/H+ exchange,calmodulin and voltage-dependent Ca2+ channel on humanheptoma cell proliferation induced by epidermal growth factor(EGF), DNA synthesis rate of hepatoma cells was measuredby the method of 3H-TdR incorporation.RESULTS: EGF (10-9 M) stimulated the proliferation of heptomacells significantly (3H-TdR incorporation was 1 880+281 cpm/well, P＜0.05), and this effect was significantly inhibited bytyrosine kinase inhibitor genistein (3H-TdR incorporation was808±209 cpm/well, P＜0.001). Calmedulin inhibitor W-7, proteinkinase C inhibitor H-7 and Na+/H+ exchange inhibitor amilorideindividually had significant inhibiting effect on EGF-inducedproliferation of hepatoma cells (3H-TdR incorporation was978±87.3 cpm/well, 1 241+147 cpm/well, 1 380+189 cpm/well, respectivly, P＜0.001, P＜0.01, P＜0.05), but they allhad no effect on the basal level proliferation of culturedhepatoma cells (3H-TdR incorporation was 1 284+260 cpm/well, 1 179+150 cpm/well, 1 392+152 cpm/well, respectivly,3H-TdR incorporation of the control was 1353+175 cpm/well, P＞0.05). Voltage-dependent Ca2+ channel inhibitorverapamil had no inhibition on EGF-induced proliferation ofhepatoma cells (3H-TdR incorporation was 1 637+133 cpm/well, P＞0.05), it also had no effect on the basal levelproliferation of cultured hepatoma cells (3H-TdR incorporationwas 1196+112 cpm/well,P＞0.05).CONCLUSION: Our data suggest that tyrosine kinase, Ca2+-calmodulin-dependent pathway, protein kinase C and Na+/H+ exchange play a critical role in EGF-induced proliferationof hepatoma cells and that the effect of EGF is independentof voltage-dependent Ca2+ channel.     

支气管哮喘患者T淋巴细胞的细胞周期分布及周期调节蛋白表达的意义

目的通过检测T淋巴细胞的细胞周期分布及其细胞周期调节蛋白(CCRP)的表达,探讨发作期支气管哮喘(简称哮喘)患者T淋巴细胞过度活化、增殖的调控机制.方法采用碘化丙啶DNA染色法应用流式细胞仪分析30例发作期哮喘患者(哮喘组)及20名正常人(正常组)外周血T淋巴细胞的细胞周期分布;采用间接免疫荧光法,应用流式细胞仪同步测定相应T淋巴细胞内CCRP、依赖激酶抑制蛋白(P27kipl)、细胞周期蛋白E(cyclin E)、cyclin A、cyclin B的表达水平.比较哮喘患者和正常人上述指标的差异.结果哮喘组S期、S+G2/M期的T淋巴细胞百分率分别为(18±9)%和(25±10)%,对照组分别为(5±4)%、(11±6)%, 两组比较差异有显著性(P均<0.01);哮喘组G0/G1期的T淋巴细胞百分率为(76±10)%,对照组为(90±6)%,两组比较差异有显著性(P<0.01).哮喘组T淋巴细胞内P27kipl的表达水平为 (4.0±2.4)%,对照组为(6.7±4.8)%,两组比较差异有显著性(P<0.05);哮喘组cyclin E、cyclin A、cyclin B的表达水平分别为(25±24)%、(9±7)%、(6.4±5.9)%,对照组分别为(6±5)%、(4±4)%、(3.4±1.6)%,两组比较差异均有显著性(P均<0.01).结论 T淋巴细胞内CCRP异常表达与发作期哮喘患者T淋巴细胞过度活化、增殖有关,将CCRP作为调控靶点,可望成为治疗哮喘的新途径.     

一氧化氮合酶基因转染抑制缺氧大鼠肺动脉平滑肌细胞增殖的机制研究

目的　研究诱导型一氧化氮合酶 (iNOS)基因转染对缺氧条件下大鼠肺动脉平滑肌细胞 (PASMCs)增殖的影响 ,探讨细胞周期蛋白依赖性激酶抑制因子 p2 1、p2 7在细胞增殖过程中的调控作用。方法　经脂质体介导将iNOS重组逆转录病毒载体 (pLNCX/iNOS)转染大鼠PASMCs,检测外源性iNOS表达及其生物学活性 ;氚标记胸腺嘧啶脱氧核苷 (3 H TdR)掺入、流式细胞技术观察iNOS转染对缺氧条件下大鼠PASMCs增殖的影响 ;逆转录 聚合酶链反应 (RT PCR)和流式细胞技术检测p2 1、p2 7的变化。 结果　转染后检测证实 ,外源性iNOS基因可有效转录、表达 ,具有生物学活性 ;iNOS转染显著抑制缺氧条件下大鼠PASMCs3 H TdR的掺入 ,缺氧组 (D组 )大鼠每分钟衰变数值为 (180 11± 2 5 2 1)次 /min ,缺氧 +DETANONOate组 (E组 ,0 5、1mmol/L)每分钟衰变数值分别为(15 36 4± 1382 )次 /min、(13712± 1782 )次 /min、低氧 +iNOS转染组 (G组 )大鼠每分钟衰变数值为(15 14 5± 15 14 )次 /min ,3组比较差异有显著性 (P <0 0 1) ;iNOS转染导致停滞于G0 /G1期的细胞比例增加 ,G组G0 /G1期细胞百分比为 6 7 8% ,与D组 (46 8% )比较差异也有显著性 (P <0 0 1) ;iNOS转染可使低氧条件下PASMCs的P2 7蛋白表达下调受到抑制 ,P2 7蛋白质表达相     

Molecular mechanism of progesterone-induced antiproliferation in rat aortic smooth muscle cells

Previously we demonstrated that progesterone at physiologic levels dose dependently inhibited cell proliferation in cultured rat aortic smooth muscle cells (RASMCs). However, the molecular mechanism underlying of progesterone-induced antiproliferation was not clear. Here we demonstrated that progesterone induced a reduction of the [(3)H]thymidine incorporation into RASMCs during the S-phase of the cell cycle. Western blotting analysis revealed that the protein levels of cyclin A, cyclin E, and cyclin-dependent-kinase (CDK) 2 but not cyclin D1 and CDK4 decreased after progesterone treatment, but those of CDK-inhibitory proteins, p21 and p27, increased. Immunoprecipitation showed that the formations of the CDK2-p21 and CDK2-p27 complex were increased and the assayable CDK2 kinase activity was decreased in the progesterone-treated RASMCs. In contrast, the formations of the CDK4-p21 and CDK4-p27 complex and the assayable CDK4 kinase activity were not changed significantly by progesterone treatment. Pretreatment of RASMCs with a p21 or p27 antisense oligonucleotide reduced the progesterone-induced inhibition of [(3)H]thymidine incorporation into RASMCs. In conclusion, these data suggest that progesterone inhibits RASMCs proliferation by increasing the levels of p21 and p27 protein, which in turn inhibit CDK2 kinase activity, and finally interrupt the cell cycle.     

Expression and function of recombinant endothelial nitric oxide synthase in human endothelial cells

Endothelial dysfunction is frequently involved in the pathogenesis of vascular disease. While nitric oxide (NO) inhibits smooth muscle cell proliferation, its effect on endothelial cell proliferation is unclear. The aim of this study was to determine if adenoviral-mediated gene transfer of endothelial NO synthase (eNOS) to human umbilical vein endothelial cells (HUVECs) would result in increased generation of NO and affect endothelial cell proliferation. HUVECs were transduced with adenoviral vectors encoding eNOS (AdeNOS) or beta-galactosidase (Ad beta gal) or exposed to diluent (control). AdeNOS-transduced cells showed increased eNOS expression as detected by Western blot analysis, and increased concentrations of cGMP (control 0.7 +/- 0.1; Ad beta gal 0.9 +/- 0.2; AdeNOS 3.1 +/- 0.5 pmol/mg protein; p < 0.001) and nitrite (control 11.8 +/- 1.2; Ad beta gal 13.3 +/- 1.7; AdeNOS 21.1 +/- 2.2 nmol/mg protein/hour; p < 0.01). DNA synthesis as assessed by [(3)H]thymidine incorporation and cell counts were significantly reduced (by approximately 30%) in AdeNOS-transduced HUVECs. Expression of mitogen-activated protein kinase was also decreased in AdeNOS-transduced cells. This study shows that adenoviral-mediated gene transfer of eNOS to HUVECs inhibits endothelial cell proliferation.     

Growth factor control of rat thyroid follicular cell proliferation

We have investigated the proliferative responses of rat thyroid follicular cells in serum-free culture to a range of growth factors including TSH, epidermal growth factor, and insulin, added singly or in combination. Follicles released from normal thyroids by collagenase/dispase digestion were cultured in suspension in agarose-coated microtiter plates to prevent monolayer formation. Growth responses were measured by [3H] thymidine incorporation and by autoradiography over successive 24- or 36-h periods. Insulin, even in the absence of other growth factors, stimulated [3H]thymidine incorporation in a concentration-dependent manner, rising from basal levels of 486 +/- (SE) 18 cpm to 4222 +/- 367 cpm/5 X 10(4) cells at 8 micrograms/ml. In contrast, TSH alone had no effect. In the presence of threshold levels (0.08 micrograms/ml) of insulin, however, there was a highly significant (P less than 0.001) response to TSH, [3H]thymidine incorporation rising from 1089 +/- 163 cpm in the absence of TSH to a maximum of 7548 +/- 585 with 1 mU/ml TSH. There was a synergistic interaction between insulin and TSH over the concentrations tested. Epidermal growth factor either alone or in combination with insulin failed to produce a significant response. Parallel autoradiographic studies were concordant with the [3H]thymidine incorporation data. We conclude that whereas in the absence of other growth factors TSH is unable to stimulate DNA synthesis in isolated rat thyroid follicles, the inclusion of just a single growth factor, insulin, permits a marked response. These observations emphasize the need for inclusion of appropriate permissive growth factor(s) when assessing the in vitro effect of a suspected tissue-specific mitogen.     

反义局部粘着斑激酶脱氧寡核苷酸对肝癌细胞侵袭性生长的抑制作用

目的 观察反义局部粘着斑激酶脱氧寡核苷酸(FAK ODN)转染对肝癌细胞侵袭性生长的影响,并探讨其作用机制。 方法 以LipofecTAMINE介导的反义FAK ODN转染Bel 7402肝癌细胞株,测定Bel 7402肝癌细胞株体外生长曲线、细胞活力,测定不同时间点该细胞体外黏附能力变化,以Transwell小室测定细胞的体外侵袭能力,同时行FAK表达与细胞DNA含量的双参数流式细胞仪检测及细胞凋亡的流式细胞仪检测。 结果 p125FAK表达在反义转染组(6.49％±0.10％)显著低于正义转染组(14.33％±1.88％)与对照组(16.68％±1.62％),F=7.66,P<0.01;反义FAK ODN转染显著抑制Bel 7402肝癌细胞株的生长,其细胞活力显著下降,肿瘤细胞抑制率在30％-60％之间;细胞体外黏附能力受到显著抑制,黏附抑制率在25％-55％间;细胞的体外侵袭能力显著下降,侵袭抑制率在15％-25％之间;细胞凋亡显著增加;细胞周期分析显示S期细胞比率显著降低,细胞生长主要阻滞在G2/M期。 结论 FAK在Bel 7402肝癌细胞的黏附与迁移运动中发挥重要作用,其表达阻断显著抑制肝癌细胞的体外黏附与侵袭活性。FAK表达阻断显著抑制肝癌细胞的体外增殖,促进细胞凋亡。