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Objective:To study the effects of brucine on vascular endothelial growth factor(VEGF)expression and microvessel density(MVD)in a nude mouse model of bone metastasis due to breast cancer,and to assess the possible antitumor mechanism of brucine.Methods:A syringe needle was used to directly inject 0.2 mL monoplast suspension(with 2×106 human breast cancer cells contained)into the bony femoral cortex of the right hind leg for modeling.Twenty-five nude mice were randomized into five groups and administered with an intraperitoneal injection of saline or drug for 8 consecutive days:model group(0.2 mL normal saline),low-dose brucine group(1.73 mg·kg-1),medium-dose brucine group(3.45 mg·kg-1),high-dose brucine group(6.90mg·kg-1,and thalidomide group(200 mg·kg-1).Diet and activity were recorded,and the tumors were harvested 5 weeks later.The percentage of VEGF-positive cells was determined with hematoxylin and eosin staining and immunohistochemical staining,and MVD expression was determined by optical microscopy.Results: The VEGF expressions in brucine-or thalidomide-treated mice were significantly reduced as compared with mice in the model group(P<0.01).There were no significant difference between the high-dose brucine group and the thalidomide group(P>0.05).Significant difference was between the high-and low-dose brucine group (P<0.05).Further,VEGF expression was significantly increased in the low-and medium-close brucine groups compared with the thalidomide group(P<0.05).The MVD values in the three brucine and thalidomide groups were significantly lower than that in the model group(P<0.01).The MVD values in the medium-and high-dose brucine groups were not significantly different from those in the thalidomide group(P>0.05),while the MVD value showed a significant increase in the low-dose group compared with the thalidomide group(P<0.05).Conclusion:Brucine could inhibit the growth of breast cancer to bone metastases,possibly by inhibiting tumor angiogenesis. 相似文献
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目的观察Ⅲ期非小细胞肺癌同步放化疗加巩固化疗的近期疗效及急性毒性反应。方法收治的Ⅲ期NSCLC患者59例,同步加巩固化疗组36例,对照组为序贯放化疗组23例。同步加巩固化疗组:放疗同步2周期化疗,放疗后行2~4周期巩固化疗;序贯组:先行适型放疗,放疗后再行4~6周期化疗。化疗均为TP方案,放疗采用常规分割剂量放射治疗。结果同步放化疗加巩固化疗及序贯组近期有效率分别为61.1%,47.8%(P0.05),一年生存期率分别为78.3%,54.6%(P0.05)。主要毒副反应:骨髓抑制,同步组及序贯组分别为100%,73.9%(P0.05),其他如放射性食管炎,放射性肺炎,胃肠道反应,两者差异无统计学意义。结论同步放化疗加巩固化疗治疗NSCLC较序贯化疗疗效确切,近期局控率高。对于急性毒性反应,如骨髓抑制、放射性肺炎、放射性食管炎及消化道反应,在重组人粒细胞集落刺激因子、适型放疗等支持下,患者多可完成治疗。 相似文献
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目的 研究益气养阴解毒方对Lewis肺癌(LLC)小鼠移植瘤生长及细胞凋亡的影响.方法 复制C57BL/6小鼠Lewis肺癌模型,将接种Lewis肺癌的C57BL/6小鼠随机分为6组:对照组(A组)、益气养阴解毒方低剂量组(B组)、中剂量组(C组)、高剂量组(D组)、顺铂(DDP)组(E组)、益气养阴解毒方联合DDP组... 相似文献
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目的观察益气养阴解毒方含药血清对体外培养Lewis肺癌细胞(LLC)增殖和凋亡的影响。方法采用血清药理学方法,用SD大鼠制备益气养阴解毒方低、中、高剂量、顺铂(DDP)、益气养阴解毒方联合DDP、0.9%氯化钠溶液(NS)含药血清,体外培养LLC,采用MTT法测各组血清对LLC增殖的影响,流式细胞仪(FCM)Annexin V- FITC/PI标记法检测细胞凋亡率,免疫组织化学(SP法)测Caspase-3表达水平。结果益气养阴解毒方含药血清能够抑制体外培养LLC生长,且呈浓度和时间依赖性,高浓度作用72h抑制率达50%,中药联合DDP抑制率最高达94.67%;与对照组比较,各组含药血清均具有诱导LLC细胞凋亡的作用,并呈剂量和时间依赖关系,中药联合DDP作用最强,作用72h时,细胞凋亡率下降,而坏死率升高;凋亡相关蛋白Caspase-3的表达与药物剂量及作用时间呈依赖性,差异有统计学意义(P<0.05),与其他各组比较,中药联合DDP作用最强(P<0.05)。结论益气养阴解毒方具有抑制LLC增殖及诱导其凋亡的作用,促进Caspase-3蛋白表达可能是其诱导LLC凋亡机制之一。 相似文献
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目的 探讨亮菌对顺铂化疗诱发胃肠道反应的防治机制.方法 90只雄性SD大鼠随机分为6组:空白对照组、模型组、亮菌低、中、高剂量组及昂丹司琼组,腹腔注射顺铂制造化疗性大鼠异食癖恶心呕吐模型,采用ELISA法测定大鼠胃肠及脑组织中5-HT含量,以观察亮菌对化疗后大鼠组织中5-HT含量的影响.结果 造模后24、48及72 h,亮菌高、中剂量组大鼠高岭土摄入量均显著低于模型组(P<0.05).结论 亮菌可有效的抑制顺铂化疗诱发大鼠高岭土异食癖反应,其作用机制可能与亮菌可抑制化疗后大鼠胃肠道组织5-HT的释放有关. 相似文献
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目的研究益气养阴解毒方对小鼠Lewis肺癌生长的抑制作用。方法复制C57BL/6小鼠Lewis肺癌模型,将60只接种Lewis肺癌的C57BL/6小鼠随机分为6组:对照组(A组),益气养阴解毒方低剂量组(B组)、中剂量组(C组)、高剂量组(D组),顺铂(DDP)组(E组),益气养阴解毒方联合DDP组(F组),每组10只,接种次日开始给药,中药连续灌胃26天,DDP隔日腹腔注射,观察移植瘤生长及小鼠一般健康情况,接种后第28天处死动物,称各组瘤重,计算抑瘤率。结果 :B、C、D组对肿瘤均有较明显抑制作用,抑瘤率分别为19.30%、32.83%、34.59%,瘤重低于对照组,差异有显著性(P〈0.01),D组抑瘤率高于B、C组,差异有显著性(P〈0.05);E组抑瘤率为51.38%,高于各中药组,F组抑瘤率达83.71%,与其他各组比较,差异有显著性(P〈0.01)。结论益气养阴解毒方具有较好的抑瘤作用,与DDP联合使用抑瘤作用明显增强。 相似文献
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Cell apoptosis is an initiative process of cell death regulated by genes.Inducing cell apoptosis is a new way of cancer treatment.In this paper,the progress in experimental studies on the effect of Chinese herbal compounds (CHC) on the induction of tumor cell apoptosis will be reviewed in terms of major mechanisms (gene expression regulation,cell morphology change,telomerase activity change,and immunity enhancement,etc.).The study on disassembled CHC,as well as the synergistic effect when in combined use with chemotherapy for inducing apoptosis,is also reviewed here. 相似文献