Hyperthermia decreases cytokine-mediated adhesion molecule expression on human umbilical vein endothelial cells

Although hyperthermia has been used as an effective cancer treatment modality, its effects on metastasis of tumour cells are not clear. Since adhesion molecules play a key role in metastasis, we evaluated how the expression of adhesion molecules is influenced by hyperthermia. Human umbilical vein endothelial cells were incubated in vitro for 1 h. at 39, 42, 43 and 44°C with and without addition of tumour-necrosis factor (TNF) or interferon-gamma (IFN-γ) and the expression of endothelial cell leukocyte adhesion molecule-1 (ELAM-1), intercellular adhesion molecule-1 (ICAM-1) and major histocompatibility complex (MHC) class-II molecule was measured. Expression of MHC class-II molecules and expression of unstimulated constituent ICAM-1's was not reduced by heat treatment. In contrast, expression of cytokine-induced ELAM-1's and ICAM-1's was significantly lower after heat treatment. The adhesion to HUVEC in vitro of HL-60 leukemia cells, which express sialyl-Lewis-x antigen as a ligand to ELAM-1, was diminished after incubation at 42°C and totally lost after treatment at 44°C. This suggests that any decrease in metastasis formation after heat treatment, which is occasionally observed, could be due to a reduced action of TNF or related cytokines on adhesion molecule induction and subsequent membrane expression by the endothelial cell. A possible underlying mechanism involved is a heat-induced alteration or blockage of the biosynthetic pathways required for synthesis of ELAM-1 and ICAM-1 proteins.     

X射线照射对人脐静脉内皮细胞焦亡的影响

目的：探讨X射线照射对人脐静脉内皮细胞（HUVEC）焦亡的影响。方法：单次10 Gy X射线照射HUVEC细胞,采用ELISA法检测照射后0~72 h HUVEC分泌细胞因子IL-1β、IL-6、TNF-α和IL-18的浓度,Western blot法检测照射后6~48 h HUVEC内Caspase-1的活化水平,采用透射电子显微镜检测照射后72 h HUVEC形态的变化。采用流式细胞术检测单次10 Gy以及多次小剂量（2.5 Gy/d,连续4 d）照射后HUVEC焦亡率的变化。结果：10 Gy X射线照射后0~72 h HUVEC中IL-1β、IL-6、TNF-α和IL-18浓度与对照组（0 Gy组）相比均明显升高（P<0.05）。10 Gy X射线照射后6~48 h细胞内Caspase-1活化水平升高（P<0.05）,细胞呈现体积增大肿胀状态。单次10 Gy照射组和多次小剂量照射组细胞焦亡率均明显高于空白对照组（P<0.01）;此外,单次10 Gy照射组细胞焦亡率较多次小剂量照射组细胞升高约1倍（P<0.01）。结论：X射线照射可引起人脐静脉内皮细胞HUVEC焦亡;在总剂量相同情况下,单次大剂量照射引起的HUVEC焦亡水平明显高于多次小剂量照射。     

Targeting NF-kappaB and induction of apoptosis by novel NF-kappaB inhibitor dehydroxymethylepoxyquinomicin (DHMEQ) in Burkitt lymphoma cells

A new NF-kappaB inhibitor, dehydroxymethylepoxyquinomicin (DHMEQ), inhibited proliferation and induced apoptosis in human Burkitt lymphoma, HS-Sultan and Daudi cell lines. The activation of caspase-3 and the cleavage of caspase substrate PARP were observed after treatment with DHMEQ. The induction of apoptosis by DHMEQ was prevented by the pretreatment of Burkitt lymphoma cells with pan-caspase inhibitor, z-VAD-FMK. The expression of anti-apoptotic factors such as IAP-1 and XIAP was suppressed by DHMEQ. Phosphorylation of ERK and JNK was induced by DHMEQ. In conclusion, these results demonstrate that NF-kappaB might be an ideal target to develop for new anti-cancer drugs for Burkitt lymphoma.     

Selective growth inhibition by sangivamycin of human umbilical vein endothelial cells

In the course of our screening for selective growth inhibitors of human umbilical vein endothelial cells (HUVECs), we isolated sangivamycin from the culture filtrate of Streptomyces. It inhibited the growth of HUVECs at approximately 30 times lower concentration than that needed to inhibit the growth of WI-38 human fibroblasts. Structurally-related nucleosides, such as toyocamycin, tubercidin, and formycins A and B, did not show the differential inhibition. Although sangivamycin is known to inhibit protein kinase C, other protein kinase C inhibitors did not inhibit the growth of HUVECs selectively. Sangivamycin effectively inhibited S-phase induction in HUVECs, like TNP-470 and LLnL, known selective inhibitors. However, unlike them sangivamycin did not induce p21 expression. On the other hand, sangivamycin was found to inhibit DNA synthesis selectively in HUVECs. Thus, sangivamycin was shown to be a new selective growth inhibitor of HUVECs acting on DNA synthesis.     

异鼠李素通过减轻氧化应激延缓D-半乳糖诱导的人脐静脉内皮细胞衰老

目的：探讨沙棘中的重要成分异鼠李素（ISO）对细胞衰老的影响及机制。方法：采用D-半乳糖（D-Gal）诱导细胞衰老模型,取20～23代的人脐静脉内皮细胞（HUVEC）分为4组：对照组、D-Gal组、D-Gal+ISO组（5 μmol/L）、D-Gal+ISO组（10 μmol/L）。其中D-Gal浓度为10 g/L,干预时间为72 h。采用CCK-8试剂盒检测各组细胞活力;衰老相关β-半乳糖苷酶（SA-β-Gal）染色试剂盒检测细胞衰老状态;各相关试剂盒检测细胞总活性氧（ROS）水平、丙二醛（MDA）含量、总超氧化物歧化酶（SOD）活性和过氧化氢酶（CAT）活性。Western blot法检测衰老标志蛋白p21、p27和核因子NF-E2相关因子2（Nrf2）及其下游蛋白表达水平。结果：ISO浓度≤10 μmol/L时对HUVEC无明显毒性作用;与对照组比较,D-Gal能够诱导细胞衰老指标SA-β-Gal活性增加（P<0.05）;提高p21、p27表达水平,提高细胞总ROS水平和MDA含量,降低总SOD和CAT活性,降低Nrf2及下游蛋白表达水平（P<0.05）。与D-Gal组比较,ISO能够降低细胞SA-β-Gal活性,抑制p21、p27表达,降低细胞总ROS水平和MDA含量,提高总SOD和CAT活性,增强Nrf2及下游蛋白表达（P<0.05）。结论：ISO可以通过减轻氧化应激,延缓D-Gal诱导的HUVEC细胞衰老,在此过程中激活Nrf2通路可能是其发挥抗衰老作用的重要机制。     

Arresten抑制HUVEC细胞增殖和管腔形成的实验研究

目的:探讨血管生成抑制因子arresten对人脐静脉内皮细胞HUVEC增殖和体外血管腔形成的影响,了解其抑制血管生成的途径。方法:采用MTT比色法,观察不同浓度的arresten对HUVEC细胞增殖的影响;Matrigel胶体外管腔形成试验检测arresten对HUVEC细胞形成血管的影响。结果:MTT比色法显示,arresten对HUVEC细胞增殖具有抑制作用,随着浓度的增加,arresten对HUVEC细胞增殖抑制作用也增强,但当其浓度增加到800 ng/mL后其增殖抑制率不再提高; arresten浓度为0、400及800 ng/mL时,HUVEC细胞形成的血管腔数分别为17±2、9±1及5±1。结论:Arresten能够抑制HUVEC细胞的增殖,并抑制HUVEC细胞形成血管腔。     

Radiosensitivity and sublethal damage repair in human umbilical cord vein endothelial cells

The assessment of the comparative radiosensitivity of different parenchymal cells is potentially of great importance in clinical radiotherapy. Previous studies from various laboratories using vessel regeneration techniques have demonstrated that endothelial cells are quite radioresistant, having a Do in excess of 250 rads. The present studies were undertaken to investigate the radiosensitivity of human endothelial cells obtained from umbilical cord veins (HEC) using "colony formation" as an endpoint, and to evaluate their ability to repair sublethal radiation damage (SLD). The endothelial origin of the cells in the surviving colonies was demonstrated by their positive staining for factor VIII antigen. The survival curve for HEC has a Do of about 165 rads, with a moderate initial shoulder. Dose fractionation studies demonstrate a moderate capability to repair SLD, comparable to other human cells studied including fibroblasts and other normal diploid cells in vitro. These studies indicate that HEC, being a terminally differentiated cell type with various differentiated markers, may prove useful in radiobiological and radiocarcinogenesis studies.     

PM2.5中不同组分对人脐静脉内皮细胞的联合毒性作用研究

目的：探讨PM_2.5中各种组分单独以及联合暴露对于人脐静脉内皮细胞（HUVECs）的毒性作用,并探讨不同组分之间是否存在交互作用。方法：以永生化的HUVECs细胞为研究对象,分别给予0、5、10、20、40、80、160 μg/mL纳米炭黑颗粒（下称炭黑）,0、2.5、5、10、20、40、80、160 μg/mL尘土颗粒（下称尘土）,0、6.25、12.5、25、50、100、200、400 μmol/L醋酸铅,0、5、10、20、40、80、160 μmol/L亚砷酸钠和氯化镉,染毒24 h,采用CCK-8法测定不同受试物对细胞存活率的影响,并计算不同受试物对HUVECs细胞的半数抑制浓度（IC₅₀）。然后进行联合染毒实验,选用细胞存活率为80%时的剂量,炭黑（或尘土）分别与铅、砷、镉对HUVECs进行联合染毒24 h,用CCK-8测定细胞存活率;另外根据PM_2.5中各组分实际占比,按m_铅：m_{炭黑/尘土}=1：50,m_砷：m_{炭黑/尘土}=1：100,m_镉：m_{炭黑/尘土}=1：500的比例进行两两联合染毒,以及按m_铅：m_砷：m_镉：m_{炭黑/尘土}=10：5：1：500的比例进行四者联合染毒。染毒24 h后,用CCK-8法测定细胞存活率。结果：HUVEC细胞存活率随着炭黑、尘土、醋酸铅、亚砷酸钠、氯化镉染毒浓度的增加而下降（P<0.05）,以上各受试物对HUVECs细胞的IC₅₀分别为16 μg/mL、110 μg/mL、184 μmol/L、15 μmol/L、14 μmol/L。炭黑与醋酸铅、亚砷酸钠、氯化镉联合染毒时,细胞存活率比炭黑单独染毒时分别下降了17.8%、43.8%、41.2%;尘土与醋酸铅、亚砷酸钠、氯化镉联合染毒时,细胞存活率比尘土单独染毒时分别下降了11.6%、27.8%、28.3%。联合染毒时细胞存活率比单独染毒时明显下降（P<0.05）。炭黑与亚砷酸钠、炭黑与氯化镉之间存在交互作用（均为P<0.05）。结论：PM_2.5中不同组分均可以对血管内皮细胞产生毒性作用,单独暴露时炭黑的细胞毒性作用比尘土大;但与3种金属联合暴露时,尘土比炭黑的联合暴露细胞毒性更大。铅、砷、镉对细胞的毒性作用大小排序为氯化镉>亚砷酸钠>醋酸铅,且炭黑颗粒与亚砷酸钠、炭黑颗粒与氯化镉之间存在交互作用,表现为协同作用。     

Anti-angiogenic effects of a nutrient mixture on human umbilical vein endothelial cells

Matrix metalloproteinases (MMPs) have been recognized as key players in the degradation of the extracellular matrix (ECM) by migration and proliferation of endothelial cells and their subsequent invasion of the underlying stroma. The prevention of ECM degradation through the inhibition of MMP activity has been shown to be a promising therapeutic approach to block the invasion that occurs during angiogenesis. In previous studies, we demonstrated the anti-tumor effect of a nutrient mixture (NM) containing ascorbic acid, lysine, proline, green tea extract, arginine, N-acetyl cysteine, selenium, copper and manganese on various tumor cell lines in vivo and in vitro. The aim of the present study was to determine whether this mixture has anti-angiogenic effects on human umbilical vein endothelial cells (HUVECs). At near confluence, the HUVEC cell cultures were tested with NM at 0, 10, 50, 100, 500, and 1000 microg/ml in triplicate at each dose for proliferation, migration, MMP expression, and invasion. Cell proliferation was evaluated by MTT assay, invasion potential by Matrigel invasion, MMP expression by gelatinase zymography, and cell migration by a 2 mm-wide scratch in plates. For tube formation, HUVECs were cultured in previously polymerized Matrigel. NM inhibited HUVEC migration, MMP expression and invasion through Matrigel in a dose-dependent manner. Zymography showed a dose-dependent inhibition of MMP-2 expression with virtual total inhibition at a 500 microg/ml concentration. Invasion through Matrigel was totally inhibited at 500 microg/ml NM. NM reduced cell migration by scratch test in a dose-dependent fashion with total inhibition at a 500 microg/ml concentration. NM also inhibited the tube formation of HUVECs, but did not significantly inhibit cell proliferation. These results together with our earlier findings suggest that NM is a relatively non-toxic formulation with anti-angiogenic effects, such as inhibiting vascular tube formation and endothelial cell invasion and migration.     

阿魏酸对人脐静脉血管内皮细胞辐射损伤的保护作用及其机制

目的：研究阿魏酸对电离辐射所致人脐静脉血管内皮细胞（HUVEC）损伤的保护作用,及其对辐射敏感蛋白Thbd和γH2AX的影响,探讨阿魏酸的抗辐射作用与机制。方法：以4~16 Gy的⁶⁰Co γ射线照射HUVEC细胞,照后48 h以MTS法检测细胞活力,探索适宜照射剂量。以10 Gy γ射线照射HUVEC细胞,分别于照射后1、3、6、12、24和48 h提取细胞总蛋白,蛋白质印迹法检测蛋白Thbd和γH2AX的表达水平。并于照射前2 h,预防性给予细胞0.001~1 μmol/L的阿魏酸,照后48 h检测细胞活力、Thbd和γH2AX蛋白表达水平的改变。结果：与未照射组（0 Gy）比较,HUVEC受到10 Gy γ射线照射后48 h,细胞活力约降低30%（P < 0.05）。以此剂量照射,照后1 h Thbd约降至正常水平的0.6（P < 0.05）,照射后48 h γH2AX约升高至正常水平的5倍（P < 0.05）。与照射对照组比较,0.1和1 μmol/L 的阿魏酸作用后,受照HUVEC的细胞活力提高（P < 0.05）,Thbd蛋白表达升高（P < 0.05）,γH2AX蛋白表达降低（P < 0.05）。结论：0.1~1 μmol/L的阿魏酸可调节10 Gy γ射线照射后HUVEC的Thbd和γH2AX蛋白的表达水平,从而促进HUVEC增殖,提高其细胞活力,发挥抗辐射作用。     

端粒酶逆转录酶在脐静脉内皮细胞耐受曲古抑菌素A诱导凋亡中的作用

目的观察曲古抑菌素A（TSA）对脐静脉内皮细胞及官颈癌细胞凋亡、端粒酶逆转录酶（hTERT）表达的影响,并探讨hTERT在脐静脉内皮细胞耐受TSA中的作用。方法磺酰罗丹明B （RSB）法检测药物动力学特征;流式细胞仪检测周期改变和凋亡;RT-PCR检测hTERT和p21^Waf1基因表达变化;免疫荧光结合流式细胞术检测hTERT蛋白表达变化;转染hTERT质粒后,PCR-TRAP- ELISA法检测转染细胞端粒酶活性;AnnexinV／PI检测转染细胞在TSA作用下的早期凋亡。结果在大剂量TSA作用脐静脉内皮细胞后,增殖抑制、周期阻滞,但凋亡并不显著;HeLa细胞在相同剂量的TSA作用下凋亡明显。脐静脉内皮细胞经TSA诱导后,hTERT表达上调,p21^Waf1则无明显变化;而HeLa细胞p21^Waf1表达上升,hTERT表达下降。转染显性负突变hTERT的脐静脉内皮细胞,其端粒酶活性显著低于对照组。TSA作用转染不同质粒的脐静脉内皮细胞的凋亡率与对照组差异有统计学意义。结论脐静脉内皮细胞可以耐受大剂量TSA诱导的凋亡,hTERT表达上调可能是脐静脉内皮细胞耐受TSA诱导凋亡的重要机制之一。     

A novel NF-kappaB inhibitor DHMEQ selectively targets constitutive NF-kappaB activity and induces apoptosis of multiple myeloma cells in vitro and in vivo

Multiple myeloma (MM) is a fatal lymphoid malignancy that is incurable with conventional modalities of chemotherapy. Strong and constitutive activation of nuclear factor kappa B (NF-kappaB) is a common characteristic of MM cells. In our study we successfully target NF-kappaB with a novel NF-kappaB inhibitor dehydroxymethylepoxyquinomycin (DHMEQ). DHMEQ completely abrogates constitutive NF-kappaB activity and induces apoptosis of MM cells, whereas control peripheral blood mononuclear cells (PBMC) are resistant to NF-kappaB inhibition and apoptosis by DHMEQ treatment. DHMEQ inhibition of NF-kappaB triggers activation of caspases 8 and 9, as well as G0/G1 cell cycle arrest accompanied by downregulation of antiapoptotic genes Bcl-XL and c-FLIP and cell cycle progression gene cyclins D1 and D2. DHMEQ-mediated inhibition of vascular endothelial growth factor (VEGF) production in MM cells raises the possibility that DHMEQ abrogates the autocrine VEGF loop and enhances its antitumor effects by inhibiting neovascularization in the bone marrow. Using an in vivo NOD/SCID/gammac(null) (NOG) mice model, we show that DHMEQ has a potent inhibitory effect on the growth of MM cells. Compared to other compounds having the potential to inhibit NF-kappaB, DHMEQ is a unique compound that blocks the translocation of NF-kappaB p65 into the nucleus and selectively targets NF-kappaB activated in tumor cells. Therefore, our study presents a new molecular target therapy in MM.     

不同亚型的半乳凝素-9对结肠癌LoVo细胞和内皮细胞体外黏附作用的影响

目的 研究不同亚型的半乳凝素-9对结肠癌LoVo细胞侵袭转移相关分子表达的调节作用,以及该调节作用对LoVo细胞与内皮细胞体外黏附作用的影响.方法 半乳凝素-9基因不同亚型的表达载体转染结肠癌LoVo细胞24 h后,分别用逆转录聚合酶链反应(RT-PCR)和Western blot方法检测整合素β1、钙黏着素E、选择素E、细胞间黏附分子-1、CD44和基质金属蛋白酶-9表达的变化.LoVo细胞分别在转染半乳凝素-9、转染半乳凝素-9+半乳凝素-9抗体、转染半乳凝素-9+选择素E抗体和转染半乳凝素-9+β-乳糖条件下进行体外LoVo细胞与内皮细胞的黏附实验.结果 半乳凝素-9L能下调选择素E mRNA和蛋白的表达,半乳凝素-9M和半乳凝素-9S能上调选择素E mRNA和蛋白的表达.体外黏附实验中,转染空载体、转染半乳凝素-9L、转染半乳凝素-9M和转染半乳凝素-9S组的平均荧光强度分别为0.90±0.20、0.94±0.24、1.60±0.11和1.45±0.13.半乳凝素-9M和半乳凝素-9S可促进kVo细胞黏附于内皮细胞(P<0.05),而半乳凝素-9抗体、选择素E抗体和β-乳糖均可抑制此作用.结论 3种不同亚型的半乳凝素-9通过不同的方式调节LoVo细胞选择素E mRNA和蛋白的表达,影响LoVo细胞与内皮细胞的体外黏附;3种不同亚型的半乳凝素-9在介导肿瘤细胞转移过程中的作用可能是不同的.     

PTEN抑制人脐静脉内皮细胞ECV304的增殖和VEGF的表达

目的:探讨与张力蛋白同源的10号染色体缺失的磷酸酶基因(phosphatase and tensin hemology deleted on chromo-some ten gene,PTEN)对人脐静脉内皮细胞ECV304细胞增殖、凋亡,及血管内皮生长因子(vascular endothelial growth factor,VEGF)及其受体1(VEGF receptor 1,VEGFR1)的影响。方法:将携带有野生型PTEN及绿色荧光蛋白(green fluorescent protein,GFP)基因的腺病毒Ad-PTEN-GFP及空载体腺病毒Ad-GFP感染ECV304细胞,MTT实验、Hoechst3342染色法及流式细胞术检测ECV304细胞的增殖和凋亡。实时荧光定量PCR法检测Ad-PTEN-GFP感染后ECV304细胞中PTEN、VEGF和VEG-FR1 mRNA表达水平,ELISA检测ECV304细胞培养上清中VEGF的水平。鸡胚尿囊膜(chick chorioallantoic membrane,CAM)血管生长实验检测PTEN对鸡胚血管生长的影响。结果:与Ad-GFP相比,Ad-PTEN-GFP感染能明显抑制ECV304细胞的增殖,诱导细胞凋亡,5 d时增殖抑制率可达(50.38±5.42)%、细胞凋亡率达(73.3±5.3)%。当感染复数为100时,Ad-PTEN-GFP组ECV304细胞的VEGF及VEGFR1 mRNA表达水平分别为未感染组的(13.40±1.32)%及(46.12±5.20)%。同时,Ad-PTEN-GFP感染能够明显抑制CAM体内血管生长[血管指数(57.6±3.37)%vs(92.2±4.37)%,P<0.05]。结论:PTEN能显著抑制人脐静脉内皮细胞ECV304的增殖、促进其凋亡,其机制可能与抑制VEGF和VEGFR1表达,抑制血管新生有关。     

Vaccination with viable human umbilical vein endothelial cells prevents metastatic tumors by attack on tumor vasculature with both cellular and humoral immunity.

PURPOSE: Because tumor endothelium is rarely targeted by immunity but is critically important for tumor growth, the immunity against tumor endothelium is to be developed as a novel antitumor strategy. EXPERIMENTAL DESIGN: First, viable human umbilical vein endothelial cells (HUVEC) were immunized to C57BL/6 and BALB/c mice to evoke specific CTLs as well as antibodies against tumor endothelium. Lewis lung carcinoma or myeloma cells were subsequently inoculated to evaluate the effect on tumor growth by vaccination. Second, the effect on tumor metastasis by vaccination was studied using tumor-resected mice receiving HUVEC immunization 3 days after excision. Third, the immune sera and T lymphocytes from HUVEC-immunized mice were transferred to tumor-bearing mice and added to cultured HUVECs to investigate their antiproliferative effect. RESULTS: Viable HUVEC immunization showed potent antitumor effects in Lewis lung carcinoma and myeloma tumor models. Both immune sera and CTL inhibited tumor growth and specifically suppressed proliferation of HUVECs. Particularly, tumors entirely disappeared on day 90 after tumor inoculation in four of six tumor-bearing mice receiving CTL therapy. In a metastatic tumor model, we found that the HUVEC vaccination prolonged life span from 30.9 to 41.5 days after tumor resection compared with PBS-treated mice without apparent side effects. CONCLUSIONS: Vaccination with viable HUVECs evoked both humoral and cellular immunity against tumor microvasculature, and therefore significantly inhibited tumor growth and prolonged life span of tumor-resected mice. This may provide with a novel treatment for metastatic tumors. Moreover, we have established a convenient method to evoke specific CTL against tumor angiogenesis.     

蜂毒素对人脐静脉内皮细胞ECV304生长的影响及其机制探讨

目的：研究蜂毒素对人脐静脉内皮细胞ECV304生长的抑制作用及其机制。方法：将人脐静脉内皮细胞ECV304进行体外培养。四甲基偶氮唑盐（MTT）法检测蜂毒素对ECV304细胞的增殖抑制作用;流式细胞术测定细胞周期;膜联蛋白Ⅴ（AnnexinV）-异硫氰酸荧光素（FITC）＋碘化丙啶（PI）双参数检测细胞凋亡;免疫细胞化学法检测经不同浓度蜂毒素作用后ECV304细胞VEGF和bFGF的表达。结果：蜂毒素可显著抑制人脐静脉内皮细胞的增殖生长,并且呈浓度依赖性,其24h、48h和72h的IC50分别为5.11μg/ml、4.68μg/ml和4.40μg/ml。经蜂毒素作用后,S期细胞比例明显增加,G0/G1期细胞比例减小,细胞周期阻滞于S期,并可诱导细胞凋亡。蜂毒素可明显下调人脐静脉内皮细胞VEGF和bFGF的表达（P〈0.05和P〈0.01）。结论：蜂毒素在体外能够抑制人脐静脉内皮细胞增殖和合成VEGF及bFGF的功能,其机制可能与阻滞细胞周期、诱导细胞凋亡有关。     

蜂毒素对人脐静脉内皮细胞ECV304生长的影响及其机制探讨

目的:研究蜂毒素对人脐静脉内皮细胞 ECV304 生长的抑制作用及其机制.方法:将人脐静脉内皮细胞 ECV304 进行体外培养.四甲基偶氮唑盐 (MTT) 法检测蜂毒素对 ECV304 细胞的增殖抑制作用;流式细胞术测定细胞周期;膜联蛋白Ⅴ (AnnexinV)-异硫氰酸荧光素 (FITC) 碘化丙啶 (PI) 双参数检测细胞凋亡;免疫细胞化学法检测经不同浓度蜂毒素作用后ECV304细胞VEGF和bFGF的表达.结果: 蜂毒素可显著抑制人脐静脉内皮细胞的增殖生长,并且呈浓度依赖性,其24h 、48h和72h 的 IC50分别为 5.11 μg/ml、4.68 μg/ml 和 4.40 μg/ml.经蜂毒素作用后,S 期细胞比例明显增加,G0/G1 期细胞比例减小,细胞周期阻滞于 S 期,并可诱导细胞凋亡.蜂毒素可明显下调人脐静脉内皮细胞 VEGF 和 bFGF 的表达 (P<0.05和P<0.01).结论: 蜂毒素在体外能够抑制人脐静脉内皮细胞增殖和合成 VEGF及bFGF 的功能,其机制可能与阻滞细胞周期、诱导细胞凋亡有关.