Evaluation of Orthogonally Oriented Electromagnetic Fields to Stabilize ROS, Induce DNA damage and Improve Survival in Non-Small Cell Lung Cancer

项目摘要/摘要 非小细胞肺癌(NSCLC)是美国最常见的癌症死亡原因之一，尽管 最近的进展，总的5年生存率仍然很低(~20%)。迫切需要发展小说 无毒的方法，以提高生存和保持生活质量。目前的研究团队最近 令人兴奋和意想不到的发现，独特的非电离正交电磁场(EMF) 显著降低A549和H1299非小细胞肺癌细胞系的克隆形成存活率。此外，在A549中， 在异种移植模型中，EMF联合治疗显著减缓了肿瘤的生长并提高了总存活率 与传统的放化疗以及耐受性良好，没有明显的不良反应。 有趣的是，作为dna损伤标志的磷酸化的过氧化氢酶在电磁场处理后也显著升高。 肿瘤，表明氧化DNA损伤增加。这些初步发现表明，电磁场可能 作为联合疗法癌症治疗的有效佐剂。现在迫切需要确定 与这一新方法相关的可行性和具体机制。当前的总体目标是 建议是确定特定的机制，通过这些机制，垂直施加的电磁场可以提供安全和 临床前小鼠模型放化疗的有效佐剂。根据初步数据，我们 假设垂直取向的电磁场选择性地增强体内O2-和H2O2的稳态水平 导致代谢氧化应激、DNA损伤和放化疗敏感性的癌细胞。二 具体目标将解决这一假设，包括：目标1.确定电磁场治疗结果的程度 在O2和H2O2驱动的癌细胞中，特定的氧化应激导致DNA损伤和反应增强 体外放化疗；以及目的2.确定O2-2的安全性和有效性以及是否参与 和过氧化氢在电动势增强异种移植瘤体内治疗反应机制中的作用 和非小细胞肺癌原位小鼠模型。使用可诱导多西环素的复杂遗传方法 将使用抗氧化酶和指示氧化应激的生化参数的测量 来检验这一假设。如果成功，该提案直接涉及R21计划公告(PAR-20- 292)，通过提供与癌症治疗相关的新的探索性研究和创新的临床前研究 开发基于电磁场的新型癌症疗法，这可能会导致第一次人类临床试验。成功 这项工作的完成还将严格定义癌细胞特异性电磁场效应的作用机制 涉及由O2-和H2O2介导的代谢氧化应激。这些数据可以用来支持临床 一种非侵入性、无毒的电磁场联合治疗方法的开发 非小细胞肺癌患者的临床试验。

Project Summary / Abstract Non-small cell lung cancer (NSCLC) is one of the most common causes of cancer death in the USA and despite recent advances, the overall 5-year survival rate remains low (~20%). There is an urgent need to develop novel non-toxic approaches to improve survival and preserve quality of life. The current research team has recently made the exciting and unexpected discovery that unique non-ionizing orthogonal electromagnetic fields (EMFs) significantly reduced clonogenic survival in A549 and H1299 NSCLC cell lines. Furthermore, in the A549 xenograft model, EMF treatment significantly slowed tumor growth and improved overall survival when combined with conventional radio-chemo-therapies as well as being well-tolerated with no apparent adverse effects. Interestingly, phosphorylated H2AX, a marker of DNA damage, was also significantly elevated in EMF treated tumors, suggesting an increase in oxidative DNA damage. These preliminary findings suggest that EMFs may serve as an effective adjuvant to combined modality cancer therapies. There is a now critical need to determine the feasibility and specific mechanisms associated with this novel approach. The overall objective of the current proposal is to determine specific mechanisms whereby orthogonally applied EMFs can provide a safe and effective adjuvant to radio-chemo-therapy in preclinical mouse models. Based on preliminary data, we hypothesize that orthogonally oriented EMFs selectively enhance steady-state levels of O2●- and H2O2 in cancer cells leading to metabolic oxidative stress, DNA damage and radio-chemo-sensitization. Two Specific Aims will address the hypothesis including: Aim 1. Determine the extent to which EMF-therapy results in O2●- and H2O2 driven cancer cell specific oxidative stress leading to enhanced DNA damage and responses to radio-chemo-therapy in vitro; and Aim 2. Determine the safety and efficacy as well as the involvement of O2●- and H2O2 in mechanisms responsible for EMF enhancement of cancer therapy responses in vivo using xenograft and orthotopic mouse models of NSCLC. Sophisticated genetic approaches using doxycycline inducible antioxidant enzymes and measurements of biochemical parameters indicative of oxidative stress will be utilized to test the hypothesis. If successful, the proposal directly addresses the R21 program announcement (PAR-20- 292), by providing novel exploratory research relevant to cancer treatment and innovative preclinical studies developing novel EMF-based cancer therapeutics, which could lead to first-in-human clinical trials. Successful completion of this work will also rigorously define mechanisms of action for cancer cell specific EMF effects involving metabolic oxidative stress mediated by O2●- and H2O2. These data can be used to support the clinical development of a non-invasive, non-toxic EMF-based combined modality approaches amenable to early phase clinical trials in human subjects with NSCLC.