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不同剂量贝伐单抗联合伊立替康对荷人结肠癌DLD-1裸鼠皮下移植瘤生长的影响 被引量:5

The Effect of Different Doses of Bevacizumab and Irinotecan on Tumor Growth in Nude Mice Bearing Human Colon Cancer DLD-1
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摘要 [目的]观察不同剂量贝伐单抗与伊立替康联合对人结肠癌裸鼠皮下移植瘤生长及肿瘤血管生成的影响。[方法]接种人结肠癌DLD-1细胞的裸鼠21只,随机分为4组:无菌生理盐水对照组(A组),5mg/kg贝伐单抗联合伊立替康化疗组(B组),10mg/kg贝伐单抗联合伊立替康化疗组(C组)和单纯伊立替康化疗组(D组)(A、B、C组每组各5只,D组6只,各组伊立替康剂量均为66.7mg/kg)。于d1,5,9(q4d×3)分别给药,治疗第10d处死裸鼠,观察肿瘤生长情况,计算抑瘤率,免疫组化法检测肿瘤组织微血管密度(MVD),评价肿瘤坏死情况。[结果]A、B、C、D组肿瘤体积分别为:646.24±397.33mm3、240.11±147.44mm3、346.21±298.59mm3、399.11±254.09mm3。B、C两组比较,肿瘤体积差异未达统计学意义(P=0.208)。与A组比较,B、C、D组抑瘤率分别为62.85%、47.91%、39.59%。A、B、C、D各组微血管密度(microvesseldensity,MVD)分别为7.000±0.71、4.940±0.58、5.080±1.25、5.557±2.04,经Dunnett检验,与A组比,B、C组肿瘤MVD均有显著性差异(P值分别为0.028、0.039),而D组与A组,及B组与C组在MVD表达上差异未达到统计学意义(P值分别为0.086、0.083)。移植瘤组织HE染色后发现各组肿瘤组织内均有不同程度的坏死。其中,对照组多以轻中度坏死为主,用药后坏死面积均增加,各组坏死分级经秩和检验,χ2=4.73,P=0.193。两两间比较,P值均大于0.05,各治疗组间的坏死差异并不明显。治疗组肿瘤细胞的凋亡较明显。[结论]不同剂量贝伐单抗联合伊立替康对荷DLD-1裸鼠移植瘤有抑制作用,联合用药有显著协同作用,推测其作用机制可能与抑制肿瘤微血管形成、诱导细胞凋亡和死亡增加有关。5mg/kg及10mg/kg贝伐单抗对移植瘤体积及MVD上的作用差异不显著。
机构地区 浙江省肿瘤医院
出处 《肿瘤学杂志》 CAS 2013年第1期42-45,共4页 Journal of Chinese Oncology
基金 浙江省医药卫生优秀青年科技人才专项基金计划资助(2008QN004)
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