Effects of 15-deoxy-△~(12,14)-prostaglandin J_2 on cell proliferation and apoptosis in ECV304 endothelial cells

AIM: To investigate the effects of 15-deoxy-△12,14-prostaglandin J2 (15d-PGJ2) on cell proliferation and apoptosis in ECV304 endothelial cells and related molecular mechanism. METHODS: MTT, Hoechst33258, TUNEL, Flow cytometry, DNA ladder, RT-PCR, Western blot, and electrophoretic mobility shift assay (EMSA) analysis were employed. RESULTS: The 15d-PGJ2 induced apoptosis in ECV304 endothelial cells in a dose-dependent manner (the percentage of apoptosis was enhanced from 10.0 %±1.3 % to 32.8 %±1.6 %), which was accompanied     

Hepatocyte growth factor protects endothelial cells against gamma ray irradiation-induced damage

Aim： To investigate the effect of HGF on proliferation, apoptosis and migratory ability of human vascular endothelial cells against gamma ray irradiation. Methods： ECV304 cells derived from adult human umbilical vein endothelial cells （HUVEC） were irradiated with a single gamma ray dose of 20 Gy. Immunocytochemistry and Western blot analysis were used to detect c-Met protein expression and HGF/c-Met signal pathway. In the HGF-treated groups, ECV304 cells were incubated with HGF （20 or 40 ng/mL） 3 h prior to irradiation. At 48 h post- irradiation, the proliferation of ECV304 cells was measured by MTT assay, the apoptosis was assessed by flow cytometry, and the migratory ability of ECV304 cells was measured by transwell chamber assay, Results： c-Met protein is expressed in ECV304 cells and can be activated by HGF. Gamma ray irradiation inhibits proliferation and migration of ECV304 cells in a dose-dependent manner. HGF significantly promoted the proliferation of ECV304 cells, and flow cytom- etry revealed that HGF can inhibit apoptosis of ECV304 cells. Transwell chamber assay also showed that HGF increases migration activity of endothelial cells. Conclusion： HGF may afford protection to vascular endothelial cells against gamma ray irradiation-induced damage.     

Astilbic acid induced COLO 205 cell apoptosis by regulating Bcl-2 and Bax expression and activating caspase-3

AIM: To investigate the effect of astilbic acid (3β, 6β-dihydroxyolean-12-en-27-oic acid, AA) on human colorectal carcinoma COLO 205 cell proliferation and apoptosis. METHODS: Proliferation of COLO 205 cells was measued by MTT assay. Content of DNA in COLO 205 cell was measued by modified diphenylamine assay. AA-induced morphological changes was observed with fluorescence microscope and transmission electron microscope. DNA fragmentation was visualized by agarose gel electrophoresis. Apoptosis rate and cell cycle distribution were determined by flow cytometric analysis. Expressions of Bcl-2 and Bax proteins were visioned by immunohistochemical analysis. The change of relative mitochondral transmembrane potential (MTP) in COLO 205 cell was analyzed with FCM after rhodamine 123 staining. RESULTS: The IC50 (96 h) of AA for inhibiting COLO 205 cell proliferation was 61.56 0.34 μmol/L. AA induced a marked concentration- and time-dependent inhibition of COLO 205 cell proliferation and reduced the DNA content in COLO 205 cell. Cells treated with AA 64 μmol/L showed typical morphological changes of apoptosis and DNA “ladder“ pattern. The cell cycle was arrested in G0/G1 phase, and the apoptosis rate was 28.25 % for COLO 205 cells treated with AA 64 μmol/L for 48 h. Meanwhile the expression of Bcl-2 protein was decreased while that of Bax was increased and relative MTP was decreased as well. DEVD-CHO1 μmol/L could increase the viability of COLO 205 cells treated with AA for 48 h. CONCLUSION: AA showed potent inhibitory activity on COLO 205 cells proliferation, and could induce COLO 205 cells apoptosis through disturbing DNA replication, down-regulating Bcl-2 expression, and up-regulating Bax expression, lowering relative MTP, and activating caspase-3 pathway.     

Octreotide inhibits proliferation and induces apoptosis of hepatocellular carcinoma cells

AIM: To study the effect of octreotide on cell proliferation and apoptosis in different hepatocellular carcinoma (HCC) cells and hepatocytes. METHODS: The proliferation of HCC cells (HepG2, SMMC-7721) and hepatocytes (L-02) was determined by MTT assay. Apoptosis was detected either by fluorescent staining, transmission electron microscopy or flow cytometry. The content of AFP in the supernatant of cultured HCC cells was determined by electrochemiluminescence immunoassay. The expression of SSTR subtypes was identified by RT-PCR. RESULTS: The proliferation of HCC cells and L-02 cells was inhibited significantly by octreotide (0.25, 0.5, 1.0, 2.0 and 4.0 mg/L). However, the apoptosis of HCC cells markedly increased in a concentration-dependent manner. Both the apoptosis index and the percentage of apoptotic cells in L-02 cells were significantly lower than those of HepG2 and SMMC-7721 cells. The content of AFP in the supernatant of cultured HepG2 cells treated with octreotide was also statistically reduced.     

Daidzein affects proliferation and apoptosis in non-small cell lung cancer cells:role of p53 signaling pathway北大核心CSCD

Aim To investigate the effects of daidzein（DD） on the proliferation and apoptosis of non-small cell lung cancer cells,with a focus on the possible role of the p53 signaling pathway in this regard. Methods CCK-8 method and flow cytometry were used to detect the effects of soy isoflavone crude extract and DD on the viability and apoptosis of HELF and H1299 cells. Gene microarray was used to detect the changes in gene expression after treatment of H1299 cells with DD. GSEA and differential analysis were used to screen the major pathways and key genes. RT-qPCR and Western blot were performed to verify the differences in mRNA and protein expression of key genes（p53 and CASP9） in the major pathways. After p53 inhibitor Pifithrin-α inhibited the expression of p53,the effect of DD on p53 mRNA and protein expression levels was examined,and the proliferative effect on H1299 cells was observed. Results Soy isoflavone crude extract and DD promoted proliferation and inhibited apoptosis of normal lung cells and inhibited proliferation and promoted apoptosis of lung cancer cells. p53 signaling pathway was significantly enriched in the DD-treated group（NES=1.78,P=0.000）,and the expressions of p53 and CASP9 genes were found to be significantly up-regulated in the treated group. Compared with the control group,mRNA expression of CASP9 and p53 significantly increased in both HELF and H1299 cells treated with DD（P<0.05）,and p53 protein expression also increased in HELF cells（P<0.05）. After inhibition of p53 expression,DD significantly increased the mRNA expression of p53 in H1299 and HELF cells（P<0.05） and also markedly increased the expression of p53 protein in H1299 cells（P<0.05）,and it was observed that DD inhibited the proliferation of lung cancer cells. Conclusions DD inhibits the proliferation and promotes the apoptosis of lung cancer H1299 cells,and the mechanism mainly involves the p53 signaling pathway. © 2023 Publication Centre of Anhui Medical University. All rights reserved.     

Effect of simvastatin on endothelium-dependent vaso-relaxation and endogenous nitric oxide synthase inhibitor

AIM: To investigate the effect of simvastatin on endothelium-dependent vasorelaxation and endogenous nitric oxide synthesis inhibitor asymmetric dimethylarginine (ADMA) in rats and cultured ECV304 cells. METHODS: Endothe-lial injury was induced by a single injection of low density lipoprotein (LDL) (4 mg/kg, 48 h) in rats or incubation with LDL (300 mg/L) or oxidative-modified LDL (100 mg/L) in cultured ECV304 cells, and vasodilator responses to acetylcholine (ACh) in the aortic rings and the level of ADMA, nitrite/nitrate (NO) and tumor necrosis factor-alpha (TNF-α) in the serum or cultured medium were determined. And the adhesion of the monocytes to endothe-lial cells and the activity of dimethylarginine dimethylaminohydrolase (DDAH) in the cultured ECV304 cells were measured. RESULTS: A single injection of LDL decreased endothelium-dependent relaxation to ACh, markedly increased the serum level of endogenous ADMA and TNF-α, and reduced serum level of NO. Pretreatment with simvastatin (30 or 60 mg/kg) markedly attenuated inhibition of vasodilator responses to ACh, the increased level of TNF-α and the decreased level of NO by LDL, but no effect on serum concentration of endogenous ADMA. In cultured ECV304 cells, LDL or ox-LDL markedly increased the level of ADMA and TNF-α and potentiated the adhesion of monocytes to endothelial cells, concomitantly with a significantly decrease in the activity of DDAH and serum level of NO. Pretreatment with simvastatin (0.1, 0.5, or 2.5 μmol/L) markedly decreased the level of TNF-α and the adhesion of monocytes to endothelial cells, but did not affect the concentration of endogenous ADMA and the activity of DDAH. CONCLUSION: Simvastatin protect the vascular endothelium against the damages induced by LDL or ox-LDL in rats or cultured ECV304 cells, and the beneficial effects of simvastatin may be related to the reduction of inflammatory cytokine TNF-α level.     

Overexpression of acetylcholinesterase inhibited cell proliferation and promoted apoptosis in NRK cells

AIM: To study the potential function of acetylcholinesterase (AChE) in apoptosis through overexpression of AChE in Normal Rat Kidney (NRK) cells. METHODS: AChE activity was detected by the method of Karnovsky and Roots. Activated caspase-3 was analyzed by Western blotting and immunoflurescence with antibody special to activated caspase-3 fragment. The expression plasmids were constructed in pcDNA3.1 containing AChE gene or a fragment of AChE antisense that were got from RT-PCR. Stable expression cell lines were selected by G418 in cells transfected by lipofection. AChE expression was analyzed by RT-PCR and Western blotting. The proliferation rates of transfected cells were examined by the growth curve and cloning efficiency. MTT assay was used to analyze the cell viability. RESULTS: The proliferation rate of the cells transfected with AChE was retarded and the cloning efficiency was lower (28.2 %±3.1 % and 48.7 %±2.1 %) than cells transfected with vector (56.1 %±0.3 %) or AChE-antisense (77.7 %±2.2 %     

Icaritin suppresses the proliferation of human osteosarcoma cells in vitro by increasing apoptosis and decreasing MMP expression

Aim： To explore whether icaritin, a prenylflavonoid derivative of the Chinese tonic herb Epimedium, could suppress the proliferation of human osteosarcoma cells in vitro, and to elucidate the mechanisms of the action.
Methods： Human osteosarcoma SaOS2 cell line was used in the present study. The proliferation of the cells was examined using MTT assay and immunofluorescence DAPI staining. Cell motility was studied with the scratch assay. Cell apoptosis was determined by Annexin V-FITC and PI double staining using flow cytometry. Western blotting and RT-PCR were used to measure the expression of mRNAs and proteins in the cells.

Results： Icaritin （5–15 μmol/L） suppressed the proliferation of SaOS2 cells in vitro in a dose-dependent manner. Furthermore, the cell motility was significantly decreased after exposure to icaritin. Moreover, icaritin （5 μmol/L） time-dependently induced the apoptosis of SaOS2 cells, markedly suppressed MMP-2 and MMP-9 expression, upregulated caspase-3 and caspase-9 expression, and increased the level of cleaved caspase-3 in the cells. Co-exposure to the caspase-3 inhibitor zVAD-fmk （10 μmol/L） compromised the icaritin-induced caspase-3 expression and apoptosis in SaOS2 cells.

Conclusion： Icaritin suppresses the proliferation of SaOS2 human osteosarcoma cells by increasing apoptosis and downregulating MMP expression.     

Peplomycin induces G1-phase specific apoptosis in liver carcinoma cell line Bel-7402 involving G2-phase arrest

AIM: To investigate the mechanism of peplomycin (PEP)-induced apoptosis in liver carcinoma cell line (Bel-7402).METHODS: Growth inhibition by PEP was analyzed using 3- 4,5-Dimethylthiazol-2-yl-2,5-diphenyltetrazoliumbromide (MTT) assay. Apoptotic cells were detected using Hoechest 33258 staining, and confirmed by flowcytometric analysis and DNA fragmentation analysis. The expression of cyclin A and B 1 were determined by flowcytometry and Western blot. Annexin V assay was measured by flow cytometric analysis. RESULTS: PEPinduced apoptosis and then inhibited cell proliferation in liver carcinoma cell line Bel-7402. Cells treated with PEP50 μmol/L for 15 h were arrested in G2-phase with dramatical expression of cyclin A and a little change in cyclin B 1.Almost all the apoptosis occurred in cells undergoing the G1-phase after treatment for 24 h. CONCLUSION:Peplomycin induced G1-phase specific apoptosis in Bel-7402 involving G2-phase arrest.     

2-Methoxyestradiol induces cell cycle arrest and apoptosis of nasopharyngeal carcinoma cells

AIM: To investigate 2-methoxyestradiol induced apoptosis and its mechanism of action in CNE2 cell lines.METHODS: CNE2 cells were cultured in RPMI-1640 medium and treated with 2-methoxyestradiol in different concentrations. MTT assay was used to detect growth inhibition. Flow cytometry and DNA ladders were used to detect apoptosis. Western blotting was used to observe the expression of p53, p21WAF1, Bax, and Bcl-2 protein.RESULTS: 2-methoxyestradiol inhibited proliferation of nasopharyngeal carcinoma CNE2 cells with IC50 value of2.82 μmol/L. The results of flow cytometry showed an accumulation of CNE2 cells in G2/M phase in response to 2-methoxyestradiol. Treatment of CNE2 cells with 2-methoxyestradiol resulted in DNA fragmentation. The expression levels of protein p53 and Bcl-2 decreased following 2-methoxyestradiol treatment in CNE2 cells, whereas Bax and p21WAF1 protein expression were unaffected after treatment with 2-methoxyestradiol. CONCLUSION:These results suggest that 2-methoxyestradiol induced cell cycle arrest at G2/M phase and apoptosis of CNE2 cells which was associated to Bcl-2 down-regulation.     

重组人内抑素对内皮细胞增殖的影响

目的　探讨原核表达的可溶性重组人内抑素(rhEndo)对ECV 30 4内皮细胞和原代培养兔主动脉内皮细胞增殖的影响。方法　利用酶标仪进行噻唑蓝 (MTT)法检测 ,同时采用倒置相差显微镜、电子显微镜、流式细胞仪、半胱天冬酶 3活性分析观察该内抑素对碱性成纤维细胞生长因子 (bFGF)刺激的血管内皮细胞增殖的影响。结果　该rhEndo明显抑制ECV 30 4细胞的增殖 ,MultiCycleDNACycle软件分析表明细胞增殖阻滞在G1期 ,流式细胞仪检测发现该内抑素可诱导ECV 30 4细胞凋亡 ,且与半胱天冬酶 3活性增强有关 ,但对原代培养的兔主动脉内皮细胞增殖并未产生明显的作用。结论　内抑素可明显抑制ECV 30 4细胞增殖并诱导其发生凋亡 ,但对原代培养的兔主动脉内皮细胞增殖没有明显的影响 ,这将有利于与血管新生有关的疾病如癌症等的治疗。     

商陆皂苷甲对自身免疫性模型小鼠的影响及其作用机制

目的:考察商陆皂苷甲对自身免疫性模型小鼠的影响及其可能的机制.方法:自身免疫性小鼠模型通过甲醛化空弯菌CJ-S_(131)辅以佐剂免疫小鼠获得.检测正常小鼠、模型小鼠及商陆皂苷甲处理的模型小鼠血清中的抗ds DNA抗体水平、细胞增殖及骨关节病理切片.通过形态学和流式细胞仪检测胸腺细胞凋亡.通过逆转录PCR的方法检测ECV304细胞中ICAM-1的mRNA表达.结果:商陆皂苷甲能有效地降低模型小鼠的抗ds DNA抗体水平、抑制淋巴细胞增殖并能缓解其骨关节炎症.而且,商陆皂苷甲能显著促进ConA活化的胸腺细胞的凋亡并能降低ECV304 细胞中ICAM-1的mRNA表达.结论:商陆皂苷甲对自身免疫性模型小鼠有治疗作用;促进胸腺细胞凋亡和降低ECV304细胞中ICAM-1的mRNA表达可能是其作用的重要机制.     

丹酚酸B镁盐抑制低氧诱导内皮细胞钙内流和一氧化氮释放

AIM: To investigate the inhibitory effect of magnesium lithospermate B (MLB) on hypoxia-induced elevation of intracellular calcium concentration ([Ca2+]i) and nitric oxide (NO) release in endothelial cells. METHODS: The cultured human umbilical vein endothelial cells (ECV304) were cultured for 30 min under 95 % N(2) and 5 % CO2. Cell injury was evaluated by dye exclusion test and lactate dehydrogenase (LDH) assay. [Ca2+]i was determined by Fura 2-AM. NO content was examined by the NO assay kit. Endothelial nitric oxide synthase (eNOS) and inducible nitric oxide synthase (iNOS) mRNA expressions were measured by semi-quantitative RT-PCR. RESULTS: Cell viability was decreased from (93.0 +/- 2.6) % in normoxia to (85.5 +/- 2.1) % in hypoxia (P < 0.01), and LDH release was increased from (41 +/- 28) U/L in normoxia to (141+/-68) U/L in hypoxia (P < 0.01) in ECV304 cultured under calcium conditions. MLB 5 and 10 mg/L improved cell viability and inhibited LDH leakage in ECV304. In addition, hypoxia increased [Ca2+]i, NO release, and eNOS and iNOS mRNA expressions in ECV304 (P < 0.01). These increases could be inhibited by MLB 5 and 10 mg/L (P < 0.01), but they were unaffected by hypoxia under calcium-free conditions. CONCLUSION: MLB attenuates hypoxia-induced cell injury and inhibits hypoxia-induced increases of [Ca2+]i, NO release, and eNOS and iNOS mRNA expressions in ECV304 in Krebs'solution containing calcium. The decreases of NO production and eNOS mRNA expression are possibly associated with inhibition of extracellular calcium influx in MLB-treated ECV304     

丹酚酸B镁盐对缺氧复氧内皮细胞内钙和一氧化氮的影响

目的:研究丹酚酸B镁盐对缺氧复氧引起的内皮细胞内钙升高和一氧化氮释放增加的影响.方法:培养的人脐静脉内皮细胞(ECV304)暴露在95％ N_2 5％CO_2条件下缺氧30分钟,后在含5％CO_2的空气中复氧30分钟.内皮细胞的损伤用染料排除实验、SOD的活性和MDA的生成来评价.胞内游离钙浓度用钙荧光探针Fura 2-AM测定.一氧化氮含量用一氧化氮试剂盒测定.内皮型一氧化氮合酶(eNOS)mRNA和诱导型一氧化氮合酶(iNOS)mRNA的表达用半定量逆转录聚合酶链式反应(RT-PCR)检测.结果:缺氧复氧引起内皮细胞的活力由正常条件下(93.1±1.2)％降至(88±3)％(P<0.01),SOD的活性也由(0.24±0.07)kNU/L下降到(0.18±0.03)kNU/L(P>0.05),但其使内皮细胞MDA的生成由(1.12±0.06)mmol/L增至(3.78±0.03)mmol/L(P<0.01).丹酚酸B镁盐2.5,5,10 mg/L能明显降低缺氧复氧引起的内皮细胞MDA生成量的增加,并且显著提高细胞活力和SOD的活性.同时,缺氧复氧还增加内皮细胞的胞内游离钙浓度(F_(340)/F_(380)由 1.65±0.16增至 1.89±0.28)和一氧化氮释放[由(7.5±1.3)μmol/L增至(16±5)μmol/L],并上调其eNOS mRNA的表达,但降低iNOS mRNA的表达(P<0.05).但在无钙的条件下,缺氧复氧对内皮细胞的胞内游离钙浓度、一氧化氮含量、eNOSnRNA和iNOS mRNA表达     

咖啡酸钠诱导内皮细胞凋亡及抑制癌细胞VEGF的表达

目的研究咖啡酸钠(SCA)诱导内皮细胞凋亡以及对癌细胞表达VEGF和IV型胶原酶的影响。方法 采用流式细胞术、 DNA凝胶电泳和形态学方法检测ECV304细胞凋亡。Western blotting分析用于观察癌细胞VEGF表达。采用酶谱方法检测IV型胶原酶对底物的降解。用ELISA方法检测IV型胶原酶和相关单克隆抗体的结合。结果SCA呈时间依赖性和剂量依赖性地诱导ECV304细胞凋亡。100和250 μg·mL^-1SCA作用ECV304细胞48 h，凝胶电泳显示DNA梯带。经SCA作用的ECV304细胞形态显示核内DNA浓聚，出现凋亡小体，荧光染色检查呈现强的蓝色深染核。SCA抑制VEGF在肝癌HepG-2细胞和前列腺癌DU145细胞的表达。SCA呈剂量依赖性抑制肺癌PG细胞分泌的IV型胶原酶的降解活性；并抑制单抗3D6与IV型胶原酶的结合。结论SCA可诱导内皮细胞凋亡，并抑制癌细胞VEGF表达及IV型胶原酶的降解活性。提示SCA可影响肿瘤血管生成及其微环境。     

腺病毒介导的TSP1f基因转移对脐静脉内皮细胞株ECV304增殖的影响

目的探讨腺病毒介导的凝血酶敏感蛋白1（TSP1）抗血管新生衍生物（TSP1f）基因转移对人脐静脉内皮细胞株ECV304增殖的影响。方法应用RTPCR方法从正常人外周血单个核细胞扩增TSP1f cDNA序列构建TSP1f重组腺病毒（ADV-TSP1f）;Western blot方法检测ADV-TSP1f介导TSP1f在K562细胞中的表达;台盼蓝拒染检测经ADV-TSP1f感染的K562细胞条件培养基对ECV304细胞增殖的抑制作用。结果K562细胞经ADV-TSP1f感染可高效表达／分泌TSP1f多肽;经ADV-TSP1f感染的K562细胞条件培养基可显著抑制ECV304细胞增殖,以ADV-LacZ及PBS作对照,抑制率分别为51．6％和53．8％。结论ADV-TSP1f可显著抑制人脐静脉内皮细胞株ECV304增殖,可望成为有效的恶性肿瘤血管新生抑制剂。     

Effects of bleomycin A5 on caspase-3, P53, bcl-2 expression and telomerase activity in vascular endothelial cells

Objective:The aim of this study was to investigate the molecular mechanism of bleomycin A5 in inducing the apoptosis of human umbilical vein endothelial cells (ECV304).Results:After treatment with different concentrations of bleomycin A5, the expression of caspase-3 in ECV304 cells was increased. It was significantly decreased with the increase of bleomycin A5 concentration, but the difference between 75 μg/ml and 150 μg/ml groups was not significant. Bleomycin A5 could significantly increase the expression of p53, with concentration dependence. It had no obvious effect on bcl-2 expression. There was high expression of telomerase in control group. After treatment with different concentration of bleomycin A5, the telomerase activity was significantly decreased.Conclusion:Bleomycin A5 can increase caspase-3 and p53 levels and inhibit telomerase activity to induce ECV304 apoptosis.KEY WORDS: Apoptosis, bleomycin A5, caspase-3, hemangioma, p53, vascular endothelial cell     

氨甲喋呤对映体对ECV304细胞抑制作用及其机制

目的探讨氨甲喋呤[(±)MTX]及其对映体[(+)MTX、(-)MTX]对ECV304细胞的生长抑制作用并探讨其机制。方法采用培养的ECV304细胞,应用MTT比色法分析其活性;用光学显微镜观察细胞的形态学变化;碘化丙啶(PI)单染流式细胞术检测细胞周期。结果在0.1～150μmol·L-1范围内,(+)MTX、(-)MTX和(±)MTX作用于ECV304细胞24、48、72h,均抑制细胞ECV304增殖,但抑制强度依次为(+)MTX>(±)MTX>(-)MTX,倒置显微镜观察不同浓度(±)MTX、(+)MTX和(-)MTX作用ECV304细胞不同时间后,出现细胞体积变小、核固缩等形态学改变。用10μmol·L-1的(+)MTX、(-)MTX和(±)MTX作用ECV304细胞48h后,PI单染流式细胞术检测ECV304细胞周期的影响,表明MTX消旋体及单一体干扰ECV304细胞DNA合成。结论(+)MTX和(-)MTX对ECV304细胞的抗增殖作用具有化学结构的立体选择性,(+)MTX的抗ECV304细胞增殖作用明显强于(-)MTX。     

氧化吲哚类化合物Z24抑制ECV304细胞增殖及迁移的实验研究

目的探讨氧化吲哚类化合物Z24对血管内皮细胞增殖及迁移的抑制作用.方法利用3H-TdR掺入DNA方法来检测Z24对人脐静脉内皮细胞ECV304增殖的影响;扫描电镜方法测定Z24对细胞骨架系统的影响;体外细胞迁移实验测定它对内皮细胞迁移的抑制效应;用免疫沉淀几Western印迹法检测它对ERK信号通路的影响.结果Z24能抑制EGF刺激后ECV304细胞的增殖,能显著抑制ECV304的骨架形成;ECV304的迁移减少;p-ERK水平下调.结论Z24能够抑制血管内皮细胞的增殖和迁移.这种抑制效应可能阻断MAPK信号通路发挥作用的.     

川芎嗪注射液对血管内皮细胞DNA合成的影响

目的 :探讨川芎嗪注射液对血管内皮细胞DNA合成的影响。方法 :采用3H -TdR掺入法 ,测定经川芎嗪注射液作用后体外培养的人脐静脉血管内皮细胞的放射性强度 (CPM )值。结果 :川芎嗪注射液可显著降低血管内皮细胞的CPM值 ,且均呈剂量依赖性。结论 :川芎嗪注射液抑制肿瘤血管生成的作用可能与其抑制血管内皮细胞DNA合成有关。