环氧化酶-2抑制剂塞来昔布对胰腺癌荷瘤裸鼠的治疗作用

目的探讨环氧化酶-2(COX-2)抑制剂塞来昔布对胰腺癌荷瘤裸鼠的治疗作用。方法构建胰腺癌荷瘤裸鼠模型,将成瘤裸鼠随机分为4组,分别给予纯水(对照组)和含有不同浓度(0.05%、0.1%、0.15%)的塞来昔布饮水,观测裸鼠肿瘤生长情况并测量不同时间的体积变化,于治疗28 d后处死裸鼠,测瘤体重量,应用caspase-3试剂盒检测caspase-3活性,免疫组织化学法检测肿瘤增殖指数(PI)和微血管密度(MVD)。结果治疗组裸鼠肿瘤体积的变化呈浓度依赖性和时效性;治疗28 d后,治疗组瘤重量均明显低于对照组[(0.96±0.09)g、(0.78±0.06)g、(0.64±0.07)g vs(1.16±0.12)g,P<0.01)];治疗组caspase-3相对活性明显高于对照组(0.021±0.002、0.026±0.003、0.031±0.002 vs 0.006±0.001,P<0.01)。0.1%组、0.15%组的PI和MVD均明显低于对照组(P<0.05);0.05%组的PI和MVD虽均低于对照组,但差异无统计学意义(P>0.05)。结论COX-2抑制剂塞来昔布可显著抑制荷胰腺癌裸鼠的肿瘤生长,其作用机制可能是通过提高caspase-3活性来诱导细胞凋亡,通过抑制肿瘤细胞的增殖和新生血管的形成来发挥抗肿瘤效应,在临床上具有潜在的应用价值。

Therapeutic Effects of COX-2 Inhibitor Celecoxib on Nude Mice Bearing Human Pancreatic Cancer Xenograft

Objective To investigate the therapeutic effects of cyclooxygenase-2(COX-2) inhibitor celecoxib on nude mice bearing human pancreatic cancer xenograft.Methods The nude mouse model of pancreatic cancer was established with human pancreatic cancer cell line BxPC-3.The mice bearing tumor were randomly divided into four groups.Control group was provided with pure water,and trial groups were provided with water containing 500 ppm,1000 ppm and 1500 ppm celecoxib,respectively.The tumor size and volume were measure...