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化物诱导的质瘤细胞的放射敏感性取决于p53缺乏

Yasuharu Ninomiya¹, Tatsuhiko Imaoka², Kazuhiro Daino²

¹Department of Radiation Effects Research, National Institute of Radiological Sciences, Quantum Life and Medical Science Directorate, National Institutes for Quantum Science and Technology, Chiba, Japan; ninomiya.yasuharu@qst.go.jp.

Anticancer research

|May 29, 2023

概括

酸盐通过使p53缺乏的质瘤细胞对辐射,特别是重离子束敏感,从而增强放射治疗效果. 这是通过在S/G2/M阶段晚期增加细胞而发生的,这表明DNA修复抑制有助于改善癌症治疗.

科学领域:

在瘤学瘤学.
辐射瘤学辐射瘤学
分子生物学分子生物学

背景情况:

石作为质瘤细胞的放射敏感剂,但其机制尚未完全理解.
针对p53缺乏的瘤的放射敏感剂对于放射治疗非常有价值,因为许多瘤缺乏功能性p53.
以前的研究表明,矿使p53-缺乏的U87MG-E6质瘤细胞对X射线敏感.

研究的目的:

通过使用重离子束,研究矿对p53-proficient U87MG细胞的放射敏感化作用.
阐明化石使质瘤细胞对辐射敏感的机制,重点关注细胞循环效应和DNA损伤反应.

主要方法:

使用流式细胞计量分析了p53-熟练的U87MG和p53-缺乏的U87MG-E6细胞中的细胞周期进展.
细胞被暴露在重离子束 (碳和铁离子) 和X射线中,有或没有化物处理.
玛H2AX (γH2AX) 诱导被评估为DNA双链断裂的标记物.

主要成果:

矿使U87MG-E6细胞敏感,但不使U87MG细胞对重离子束和X射线敏感.
在U87MG-E6细胞的敏感性与S/G2/M阶段晚期细胞的百分比增加相关,经过联合治疗,特别是用碳离子.
在用碳离子束和酸盐处理的U87MG-E6细胞中观察到显著的γH2AX诱导,但在U87MG细胞中没有.

结论:

酸盐通过增加S/G2/M阶段晚期细胞的比例,可能通过DNA修复抑制,使质瘤细胞对辐射敏感.
这种效应在p53缺乏的细胞中更为明显,突出了针对特定瘤类型的潜在治疗策略.
这些发现支持开发先进的放射治疗方案,利用矿作为p53缺乏质瘤的放射敏感剂.

关键词:

质瘤是一种质瘤.亚化石是一种化石.重离子束的重离子束是什么?在 p53 里,p53 是一个 p53 号码.辐射敏感化辐射敏感化

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