获得的辐射电阻诱导了依赖醇的西斯普拉丁交叉电阻
Samir V Jenkins1, Shruti Shah1, Azemat Jamshidi-Parsian1
1Department of Radiation Oncology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205.
Radiation research
|February 8, 2024
概括
在非小细胞肺癌 (NSCLC) 细胞中获得的辐射耐药性增加了DNA修复,并赋予了对西斯的交叉耐药性,可以通过向谷氨酸通路来克服. 这表明新的组合疗法可以改善患者的治疗结果.
科学领域:
- 在瘤学瘤学.
- 辐射瘤学 辐射瘤学
- 癌症生物学 癌症生物学
背景情况:
- 抗辐射是非小细胞肺癌 (NSCLC) 治疗的主要临床障碍.
- 了解驱动获得的放射电阻的分子机制对于开发有效的治疗策略至关重要.
研究的目的:
- 研究NSCLC中获得的抗辐射能力的细胞和分子特征.
- 确定克服放射电阻和相关交叉电阻的潜在治疗点.
主要方法:
- 产生了基因匹配的抗辐射 (RR) 鼠类易斯肺癌 (LLC) 和人类A549细胞系.
- 评估了DNA损伤 (γH2AX),细胞亡,细胞核与细胞核的比例,表皮细胞与细胞介质细胞转换 (EMT) 标志物,以及细胞迁移.
- 在体内评估了对基化疗剂的放射电阻和交叉电阻.
- 研究了醇水平的作用和布氨酸硫胺 (BSO) 对西斯普拉丁耐药性的影响.
主要成果:
- 耐辐射 (RR) NSCLC 细胞表现出DNA修复 (γH2AX) 的增加和亡的减少.
- A549-RR细胞显示核与细胞质的比例发生变化,辐射诱导的可塑性增加.
- 获得的放射电阻赋予了与青相关的交叉电阻,与提升的醇水平有关.
- 在体内研究证实了RR细胞的增强放射电阻.
- 布氨酸硫胺 (BSO) 通过降低醇水平,使RR细胞对思素敏感.
结论:
- 基因匹配的NSCLC细胞系为研究获得的放射电阻提供了一个模型.
- 提升的醇水平调解了耐辐射NSCLC中西斯的交叉抗性.
- 通过像BSO这样的药物准谷氨酸通路,可以克服西斯普拉丁耐药性.
- 涉及辐射,化疗和谷氨途径抑制剂的组合疗法有望改善NSCLC治疗结果.
更多相关视频
04:04Endobronchial Ultrasound-guided Intratumoral Injection of Cisplatin for the Treatment of Isolated Mediastinal Recurrence of Lung Cancer
Published on: February 12, 2017
10.5K
09:38Establishing Dual Resistance to EGFR-TKI and MET-TKI in Lung Adenocarcinoma Cells In Vitro with a 2-step Dose-escalation Procedure
Published on: August 11, 2017
8.8K
相关概念视频
Treatment Resistant Cancers
3.3K
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.3K
Mutations
37.5K
Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...
37.5K
Mismatch Repair
40.1K
Overview
40.1K
