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针对局部辐射损伤的microRNA血液特征

Lucie Ancel¹, Olivier Gabillot¹, Chloé Szurewsky¹

¹Radiobiology and Regenerative Medicine Research Service, Radiobiology of Accidental Exposure Laboratory, IRSN PSE-SANTE/SERAMED/LRAcc, 31 av de la Division Leclerc, 92260, Fontenay-aux-Roses, France.

Scientific reports

|February 1, 2024

概括

研究人员在小鼠中发现了八种循环微RNA (miRNA) 的特征,这些特征可以诊断局部辐射损伤 (LRI) 的严重程度. 这一发现为早期LRI诊断和预后提供了潜在的可能性,使用基于血液的生物标志物.

科学领域:

辐射瘤学辐射瘤学
分子生物学分子生物学
生物标志物发现发现

背景情况:

放射性事故可能导致严重的局部辐射损伤 (LRI),影响皮肤和底层组织.
早期诊断LRI对于有效的受害者管理至关重要.
循环中的microRNAs (miRNAs) 显示为辐射诱导的血液学缺陷的生物标志物具有前途.

研究的目的:

为了识别血液miRNA签名来诊断局部辐射损伤 (LRI) 的严重程度.
在临床前小鼠模型中研究循环miRNAs作为LRI的潜在生物标志物.

主要方法:

利用后肢照射小鼠模型,使用不同的X射线剂量来诱导LRI.
进行了广谱血miRNA分析,随后在两个独立的队列中进行了有针对性的验证.
采用多变量稀疏部分最小方程差异分析来识别miRNA签名.

主要成果:

确定了一个由八个循环miRNA组成的小组,能够在小鼠中区分LRI严重程度.
已识别的miRNA与全身辐射,炎症和皮肤疾病有关.
该miRNA签名有效地根据诱导的局部辐射损伤的严重程度对小鼠进行分离.

结论:

循环的miRNA可以作为有效的分子生物标志物,用于预后和诊断局部辐射损伤.
已识别的八个miRNA签名具有早期LRI检测和患者分层的潜力.
这项研究支持开发用于辐射相关损伤的非侵入性诊断工具.

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相关概念视频

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...