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肺腺癌骨转移裸小鼠模型的建立及MicroCT观察
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肺腺癌骨转移裸小鼠模型的建立及MicroCT观察
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Journal Article
肺腺癌骨转移裸小鼠模型的建立及MicroCT观察
2013
Overview
背景与目的骨转移占晚期肺癌的50%-70%。本研究以体外侵袭、迁移能力不同的肺腺癌细胞系A549、H1299、SPC-A-1、XL-2为基础建立肺腺癌骨转移裸小鼠模型,MicroCT观察骨转移情况。方法将50只6 w-8 w龄裸小鼠随机平均分为5组,4个实验组左心室分别注射相应四种细胞悬液（0.2 mL/只）;对照组左心室注射等量生理盐水。注射后第二周起定期对各组小鼠进行MicroCT扫描,当小鼠明显消瘦时此组观察结束,结束前行骨组织病理学检查;对各实验组出现的骨转移部位按中轴骨和四肢骨归类,比较这两种部位之间的转移率;根据各组出现骨转移所用平均时间、骨转移率,对各细胞系骨转移能力进行统计分析。结果经MicroCT、病理学检查确定,各实验组出现不同骨转移率,对照组小鼠无骨转移现象;各实验组中轴骨转移率均明显高于四肢骨,这与临床上肺癌骨转移规律一致,模型建立成功。各实验组间发生骨转移的小鼠数目及出现转移所用平均时间无明显差异。结论MicroCT能清晰地检测到骨质破坏,利于骨转移情况的判断;我们成功建立了肺腺癌骨转移模型,为以后探索出新的肺腺癌乃至肺癌骨转移临床预防和治疗方案提供基础;4种肺腺癌细胞系体外侵袭、迁移能力强弱不等,但体内骨转移能力没有明显差异,其原因还有待进一步的探索。
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