红花多糖对小鼠Lewis肺癌移植瘤生长及转移的影响

Objective To investigate the inhibitory effects of safflower polysaccharide (SPS) on tumor growth and metastasis of T739 mice transplanted with Lewis lung carcinoma cells, then explore the anti-tumor mechanism of action. Methods The xenografts derived from Lewis lung carcinoma cells were established in T739 mice. Inoculated mice were randomly divided into control group, low dose SPS group, moderate dose SPS group and high dose SPS group, daily oral administration, a total of 28 times. Tumor volume and weight were measured and lung metastatic foci of the mice were observed under microscope. MTT assay was used to investigate both the inhibitive effect of SPS on Lewis lung carcinoma cells and the influence on proliferation of T lymphocytes. Results There was no inhibitory effect of SPS on Lewis lung carcinoma cells in vitro. In vivo, SPS could promote proliferation of T lymphocytes and inhibit tumor growth and metastasis. There were significant differences when comparing the SPS groups with control group in terms of the volume, weight and lung metastatic foci of the transplanted tumor ( P ＜ 0.05 ). Conclusion SPS could inhibit the tumor growth and metastasis.The anti-tumormechanism of action was about related to increase the immunological function of mice.[Key words] Safflower Polysaccharide; Lewis lung carcinoma; Transplanted tumor; Lung metastatic     

小鼠Lewis肺癌胸膜转移模型建立

肺癌一旦确诊 ,70 %已届中晚期 ,但是目前没有理想的和肺癌发展进程一致的模型 ,尤其是晚期肿瘤模型。传统的方法是将肿瘤移植到动物皮下或采用导管移植到支气管内 ,但是不能很好地模拟晚期临床特征 ,如呼吸困难、胸水等。我们采用Ｃ5 7ＢＬ纯系小鼠Ｌｅｗｉｓ肺癌细胞胸腔内注     

黄芪多糖联合顺铂对小鼠Lewis肺癌细胞肺转移的影响

目的观察黄芪多糖(APS)联合顺铂(DDP)对小鼠Lewis肺癌细胞肺转移、核因子(NF)-κB、P38、P53及Caspase-9表达的影响。方法将90只Lewis小鼠随机分为模型组、顺铂组(6mg/kg DDP)、APS组(50、100、200)mg/kg,联合用药组[1/2 DDP+APS,即:(3+25、3+50、3+100)mg/kg]。各组均于造模第2天起用药,APS每日1次,DDP每周1次,连续20d。观察肿瘤肺转移情况,采用Real-time PCR法和Western blotting法检测肿瘤组织中NF-κB、P38、P65蛋白和基因,并用免疫组织化学检测Caspase-9的表达。结果与模型组相比,各治疗组均可降低肺转移灶数目(P0.05或P0.01);除P38外,APS中、高剂量组可使小鼠Lewis肺癌组织中NF-κB p65、P53表达降低,Caspase-9表达增高;联合用药高剂量组作用则接近DDP组。结论 APS可抑制小鼠Lewis肺癌细胞的转移,抑制NF-κB和丝裂原活化蛋白激酶(MAPK)信号通路的激活,这可能是其抑制肿瘤转移的机制之一;APS与减半剂量的DDP铂类化疗药物联合使用时,作用增强,APS对DDP有增效减毒作用。     

威麦宁抗小鼠Lewis肺癌转移作用及分子机制的研究

目的 :研究威麦宁抗小鼠Lewis肺癌转移作用并探讨其作用的分子机制。方法 :选用C5 7BL/ 6J小鼠 ,接种Lewis肺癌细胞复制自发性肺转移模型 ,并随机分 4组 :生理盐水组 (NS) ;威麦宁低剂量组 (WL ,15 0mg·kg-1·d-1) ;威麦宁高剂量组 (WH ,2 5 0mg·kg-1·d-1) ;环磷酰胺组 (CTX ,6 0mg·kg-1·d-1)。接种后第 2d灌胃给药 ,共 2 8d。CTX组腹腔注射给药 ,连续 7d。第 2 9d处死各组小鼠 ,取肺用苦味酸固定 ,解剖镜下计数肺表面转移灶 ;取原发瘤组织常规固定、包埋、切片 ,HE染色及光镜下观察 ;瘤组织CD34免疫组化染色微血管密度 (MVD…     

树突细胞对Lewis肺癌抗瘤作用的研究

目的：研究经体外骨髓细胞衍生的DC在Lewis肺癌中的抗瘤作用。方法：将肿瘤抗原MUT－1加载的DC（DC－MUT－1）经尾静脉免疫C57BL／6小鼠后,随后将肿瘤细胞接于小鼠皮下,观察DC能否诱发机体的免疫保护。同时检测DC－MUT－1免疫后小鼠脾脏T细胞的CTL活性。结果：经DC－MUT－1免疫后能诱发机体产生对相应肿瘤细胞的持久和特异性的免疫保护作用,体外检测CTL活性显示,免疫小鼠脾脏T细胞对相应肿瘤具有 特异性杀伤。结论：经DC－MUT－1免疫小鼠能诱发机体产生特异性抗肿瘤细胞免疫从而使宿主对随后的肿瘤细胞攻击产生特异性的免疫保护作用。     

D-Limonene对小鼠移植瘤生长及淋巴管生成的影响

目的:观察右旋柠烯对小鼠移植瘤生长及淋巴管生成的影响,并探讨其作用机制。方法:皮下注射肉瘤(S180)腹水型瘤株构建小鼠移植瘤模型,给予D-Lim onene干预,免疫组化染色观察瘤细胞V EG F-C表达,LY V E-1标记淋巴管,观察其分布。结果:对照组瘤细胞V EG F-C表达较强,瘤周边部淋巴管较多,有淋巴结、肺转移。用药组瘤细胞V EG F-C表达较弱;瘤周边部淋巴管较少,未见淋巴结、肺转移。结论:D-Lim onene有抑制移植瘤内瘤细胞V EG F-C表达和淋巴管生成的作用,有可能降低肿瘤的淋巴道转移。     

苏铁总黄酮对Lewis 肺癌模型小鼠的抑制作用及免疫功能的影响

目的:探讨苏铁总黄酮对Lewis 肺癌模型小鼠的抑制作用及免疫功能的影响。方法:选取造模成功的荷瘤小鼠84 只,随机分为模型组、空白对照组、苏铁总黄酮高、中、低剂量组、顺铂组、联合组,每组12 只。分别给药干预14 d,于第15天摘眼球法取血,常规法剥取肿瘤组织、肺、脾、胸腺,并分别称重,计算抑瘤率、肺脏指数、脾脏指数和胸腺指数;采用ELISA法检测血清中IL-2、IL-10 的含量。结果:苏铁高、中、低各剂量组、顺铂组和联合组小鼠瘤质量与模型组比较均降低,差异具有显著意义(P<0.01),苏铁总黄酮高、中、低各剂量组的脾脏指数和胸腺指数明显增加,且远远高于顺铂组与联合组。ELISA 法检测结果显示,与模型组比较,苏铁总黄酮高中低各剂量组、顺铂组和联合组的IL-2 水平明显升高,而IL-10 水平除了苏铁总黄酮中剂量组之外的其他各组均明显升高。结论:苏铁总黄酮可以调节免疫细胞因子IL-2、IL-10 的表达水平,抑制Lewis 肺癌模型小鼠肿瘤细胞的生长与转移并提高其免疫功能。     

黄芪多糖联合顺铂对小鼠Lewis肺癌移植瘤Caspase-3、Smac/Diablo表达的影响

目的观察黄芪多糖(APS)及联合顺铂(DDP)对小鼠Lewis肺癌(LLC)移植瘤凋亡蛋白Caspase-3、Smac/Diablo表达的影响,探讨黄芪多糖抗肿瘤的机制。方法 90只C57BL/6 J小鼠,随机分为9组,正常组、模型组、APS低、中、高剂量组、DDP组、联合低、中、高剂量组,每组10只。除正常组外,其余80只均接种肺癌移植瘤细胞(1×1010/L)于右前肢腋窝皮下,制造模型为荷瘤小鼠。制造模型次日起,治疗组的小鼠给予腹腔注射0.3 ml药物。顺铂每周注射1次,其余药物每日1次,正常组和模型组注射等体积生理盐水,连续20 d,于第21天处死。肿瘤组织进行HE染色并行病理学观察;免疫组织化学染色和图像分析方法检测移植瘤细胞中的Caspase-3及Smac/Diablo的表达。结果荷瘤小鼠在APS(高)、联合(中)、联合(高)组的体质量变化,具有统计学意义。与模型组小鼠比较,肿瘤组织的病理组织学HE显示,APS(高)联合顺铂组的肿瘤细胞坏死最为明显;免疫组织化学法表明,治疗组的肿瘤组织中Caspase-3、Smac/Diablo蛋白表达水平均升高,联合(高)组升高最明显。结论 APS及联合化疗药物DDP能抑制小鼠Lewis肺癌细胞的生长,其机制可能与升高Caspase-3、Smac/Diablo的表达有关。     

Lewis肺癌小鼠红细胞免疫系统功能变化的实验研究

本文运用Ｌｅｗｉｓ肺癌小鼠模型，系统地观察了Ｌｅｗｉｓ肺癌小鼠红细胞免疫功能各项指标的变化，以探讨原发性肺癌与红细胞免疫系统之间的关系。结果显示：Ｌｅｗｉｓ肺癌小鼠红细胞Ｃ３ｂ受体花环率下降，红细胞免疫复合物花环率升高，红细胞免疫粘附肿瘤细胞花环率下降，血清红细胞免疫粘附促进因子活性减弱，而抑制因子活性增强。提示：原发性肺癌机体红细胞免疫粘附功能降低，红细胞免疫自我调控系统功能紊乱。     

在不同转移潜能人肺癌细胞移植瘤中血管性血友病因子的表达

目的探讨血管性血友病因子(vWF)在不同转移潜能人肺癌裸鼠移植瘤中的表达。方法体外培养低转移及高转移人肺癌细胞系A549和D95,Transwell小室法检测肿瘤细胞体外侵袭和迁移能力;10只Balb/c裸小鼠随机分为A549组和D95组(n=5)。0. 2 mL两种肿瘤细胞悬液(浓度约为1×10^7/mL)分别皮下注入A549组及D95组裸小鼠左上肢,构建人肺癌裸鼠移植瘤模型。观察vWF对裸小鼠移植瘤生长的影响;ELISA检测外周血vWF水平;免疫组化检测移植瘤vWF蛋白表达;免疫印记检测移植瘤、肺和肝vWF蛋白表达。结果 D95肺癌细胞体外侵袭和迁移细胞数多于A549肺癌细胞(P<0. 05);D95组裸小鼠于皮下接种后第5天全部出现瘤结节,A549组于第7天全部出现;与A549组相比,D95组裸小鼠移植瘤质量及肺转移瘤结节数显著增多(P<0. 05),D95组移植瘤、肺及肝组织vWF蛋白的表达显著高于A549组(P<0. 01)。结论 vWF与人肺癌细胞的转移潜能密切相关。     

Sensitivity of lewis lung carcinoma to cisplatin undergoes considerable variations during growth and metastasizing

Growth and metastasizing of Lewis lung carcinoma were accompanied by complex changes in tumor sensitivity to cisplatin. On day 17 of growth, tumor sensitivity was much lower than immediately after transplantation. Further growth of Lewis lung carcinoma was accompanied by a progressive increase in its sensitivity to cytostatic treatment. The study of migration activity of the tumor and dynamics of metastasizing showed that metastatically active carcinoma cells dominated on day 17 of tumor growth, but then the number of these cells progressively decreased to the 29th day of tumor growth. Growth-related changes in the sensitivity of Lewis lung carcinoma were probably due to complex variations in the number of metastatically active tumor cells with high resistance to cisplatin. Translated fromByulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 138, No. 9, pp. 333–336, September, 2004     

小鼠HCV皮下移植瘤的建立及DNA 疫苗的治疗作用

目的　建立小鼠丙型肝炎病毒（HCV）皮下移植瘤,并以其为HCV感染动物模型,观察HCV核心(C)基因DNA疫苗（pcDNA-HCV-C）在体内对HCV感染的治疗作用。方法　将pcDNA-HCV-C用脂质体（LipofectAMINE）法转染BALB/c小鼠骨髓瘤Sp2/0（H-2     

MMP 2、MMP 9在非小细胞肺癌中的表达及其与临床病理特征的关系

目的 探讨MMP2、MMP9在非小细胞肺癌组织中的表达及其与临床病理特征的关系方法用链菌素生物素蛋白-过氧化物酶免疫组织化学法（SP法）检测83例手术切除，的NSCLC组织及其交界区组织和24例正常肺组织中MMP2、MMP9的表达，分析二者在肿瘤组织中的过表达与NSCLC的临床病理特征的关系，结果 MMP2、MMP9主要表达于肿瘤细胞的胞浆，在癌旁交界区组织也有表达，肿瘤组织的过表达率显著高于交界区（P〈0．005），在正常组织中无过表达；二者的过表达与肿瘤类型、病理分级、性别、年龄、吸烟史无明显关系；MMP2在肿瘤组织的过表达率与淋巴结转移状态及临床分期有关（P〈0．05）．结论 MMP2、MMP9都参与了NSCLC发生发展过程，并且可能对肿瘤的发生发展有促进作用，MMP2与淋巴结转移和临床分期密切相关。     

Sensitivity of Lewis lung carcinoma to cisplatin undergoes considerable variations during growth and metastasizing

Growth and metastasizing of Lewis lung carcinoma were accompanied by complex changes in tumor sensitivity to cisplatin. On day 17 of growth, tumor sensitivity was much lower than immediately after transplantation. Further growth of Lewis lung carcinoma was accompanied by a progressive increase in its sensitivity to cytostatic treatment. The study of migration activity of the tumor and dynamics of metastasizing showed that metastatically active carcinoma cells dominated on day 17 of tumor growth, but then the number of these cells progressively decreased to the 29th day of tumor growth. Growth-related changes in the sensitivity of Lewis lung carcinoma were probably due to complex variations in the number of metastatically active tumor cells with high resistance to cisplatin.Translated from Byulleten Eksperimentalnoi Biologii i Meditsiny, Vol. 138, No. 9, pp. 333–336, September, 2004     

Effect of Baikal Skullcap Extract Administered Alone or in Combination with Cyclophosphamide on Natural Cytotoxicity System in Mice with Lewis Lung Carcinoma

Baikal skullcap extract was introduced into cytostatic therapy of mice with Lewis lung carcinoma. This extract potentiated the antimetastatic effect of cyclophosphamide in mice with grafted tumors. Combined treatment with cyclophosphamide and extract of Baikal skullcap modulated cytotoxic activity of natural killer cells and peritoneal macrophages during tumor growth.     

肺神经内分泌癌的免疫组化与免疫电镜研究

本文应用免疫组化与免疫电镜技术对20例肺神经内分泌癌进行了研究,另6例非神经内分泌癌作为对照。结果表明:嗜铬颗粒蛋白A免疫组化染色19/20例阳性,免疫电镜能够比较特异地标记神经分泌颗粒,具有确诊意义;神经特异性烯醇化酶染色20/20例阳性,非神经内分泌癌3/6例阳性,免疫电镜下无特异性分布,适宜作为诊断的筛选指标;S-100蛋白和5-HT亦可作为诊断之参考。