陡脉冲治疗卵巢癌中组织因子的变化

Steep Pulse Changes the Expression of Tissue Factor in Ovarian Tumor

电脉冲因其微创,靶向性强,无明显禁忌而逐渐成为肿瘤治疗研究的热点。其对肿瘤治疗的有效性研究已取得一系列肯定的结果,但其治疗机制仍旧没有得到完全的研究证实。为明确陡脉冲对肿瘤的治疗机制,本实验采用能量可控陡脉冲(Energy controllable steep pulse,ECSP)治疗荷瘤裸鼠,检测既是凝血系统重要启动因子、又是肿瘤浸润和转移指标——组织因子(Tissue factor,TF)在ECSP治疗前后的变化,分析ECSP,肿瘤凝血状态及肿瘤浸润、转移之间的相互作用,浅析ECSP对肿瘤的治疗机理。实验中将裸鼠卵巢癌皮下移植瘤完全随机分为治疗组和未治疗组,ECSP对治疗组作用后,光镜从形态学观察血栓形成,免疫组织化学SP法、RT-PCR对TF进行定位和定量检测。结果显示,ECSP作用后肿瘤血栓明显形成,TF在肿瘤治疗组表达明显降低。结果表明,ECSP促血栓形成,消耗TF,改变肿瘤组织高凝状态;同时TF在卵巢癌组织表达减少,提示ECSP与卵巢癌的侵袭和转移受抑制有关。

As a micro-wound and target-aimed technology without special limitation, Electric Pulses have been widely researched in tumor treatment and the effects have been demonstrated by a series of experiments, yet the mechanism has not been explained clearly, In this experiment, energy controllable steep pulse （ECSP） was used to treat nude mice bearing human ovarian tumor,and the result was compared with that of the control group. The expression of an important coagulant factor-tissue factor （TF） was analyzed, as TF was also a tumor indicator of invasion and metastasis, the result may indicate the relationship among ECSP, thrombosis and tumor invasion. In this study, to shed light on the mechanism of tumor treatment in electrical fields, nude mice bearing ovarian tumors were randomly divided into the treated group and the untreated group. We treated the former group and took out the tumor instantly. The thrombosis and necrosis of ovarian tumor were observed under microscope. The expression of TF was analyzed by SP irnmunohistochemistry and RT-PCR. Lower level of TF expression was noticed in the tumor tissue treated by ECSP, and more apparent thrombosis was also seen in this group. The results make it clear that ECSP can accelerate thrombosis and consume coagulant factors such as TF, and that low expression of TF in tumor tissue can cut out the signal paths of tumor invasion. So it is suggested that ECSP may restrain tumor invasion and metastasis by modulating thrombosis.