目的: 探讨脉冲式机械加载对小鼠乳腺癌肺转移的抑制作用。 方法:30只4~6周龄BALB/c雌性小鼠随机分为模型组 与治疗组 ,通过每只尾静脉注射鼠源性乳腺癌细胞(4T1),建立小鼠乳腺癌肺转移模型。治疗组小鼠每天接受膝关节机械加载治疗,治疗18 d后处死。取肺脏,解剖显微镜下计数肺部转移瘤数目,TUNEL法分析肿瘤细胞凋亡情况,墨汁灌注肺脏切片观察转移灶周围血管生成情况,免疫组化分析细胞增殖和血管生成情况。结果:与模型组相比,治疗组肺部转移瘤数目明显减少(P<0.05),TUNEL阳性细胞明显增多(P<0.01),转移灶周围血管面积明显降低(P<0.05)。结论:机械加载能够有效地抑制小鼠乳腺癌肺转移,该抑制作用可能与机械加载能够促进肿瘤细胞凋亡和抑制肿瘤血管生成有关。
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基金项目 国家自然科学基金资助项目(81572100)
作者简介赵灿(1990-),女,硕士在读,研究方向:主要从事乳腺癌转移方面的研究;通信作者:张平, E-mail: pizhang2008@163.com; 王俊艳, E-mail: junyan73@hotmail.com。
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