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Effect of Argon-Helium cryoablation on necrosis and cell apoptosis of subcutaneously transplanted tumor of LA795 in T739 mice
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- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 19
- DOI:
- 10.3321/j.issn:1000-2790.2007.19.004
- Key Word:
- Endocare氩氦刀;冷冻消融;腺癌;凋亡
Abstract： 目的:研究氩氦刀冷冻消融对T739小鼠LA795肺腺癌皮下移植瘤坏死和细胞凋亡的影响. 评价氩氦刀冷冻治疗非小细胞肺癌的可行性及疗效. 方法:建立T739小鼠LA795肺腺癌皮下移植瘤动物模型. 氩氦刀冷冻后,光学显微镜观察冷冻坏死消融规律;末端标记法(TUNEL)原位检测周边冷冻损伤区带细胞凋亡,免疫组织化学法检查Bc1-2和Bax表达;Western Blot检测冰球周边冷冻损伤区Caspase-3表达及聚腺苷二磷酸核苷聚合酶(PARP)剪切活性. 结果:在冷冻中心区,细胞死亡以坏死为主,坏死呈现"双峰"效应:氩氦刀术后3 h出现第1次坏死高峰,坏死区域面积/肿瘤面积达(47±5.51)%;术后4 d出现第2次坏死峰,坏死区域面积/肿瘤面积达(68±4.69)%. 在周边冷冻损伤区,光镜形态学检查及TUNEL染色可观察到明确的细胞凋亡,术后8～16 h凋亡达高峰,凋亡率为(71±6.41)%. 免疫组化显示,Bcl-2蛋白表达在冷冻前后无明显变化,bax蛋白在冷冻后其表达上调. Western Blot结果显示:冷冻后冰球周边损伤区带Caspase-3和PARP剪切、激活. 结论:氩氦刀通过坏死和凋亡两种途径达到有效的消融. 冷冻消融可能通过Caspase途径诱导周边损伤区带细胞凋亡. 其凋亡机制有Bax蛋白参与,而与Bcl-2无关.
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