循环胺,甲基和5-Flurouracil化疗对海马体依赖认知和肠道微生物群的影响
Christa Corley1,2, Chase Swinton1,2, Taylor McElory1,2
1Division of Radiation Health, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
Frontiers in microbiomes
|March 16, 2026
概括
化疗会损害空间记忆,并减少小鼠的关键大脑基因表达. 这些认知缺陷可能源于突触可塑性和长期增强的变化,影响癌症幸存者.
科学领域:
- 神经科学是一个神经科学.
- 在瘤学瘤学.
- 微生物组研究的研究.
背景情况:
- 化疗引起的认知障碍或"化脑"显著影响癌症幸存者的生活质量.
- 虽然发达国家乳腺癌的存活率很高,但在全球范围内存活率较低,这凸显了解决治疗副作用的必要性.
- 了解化疗对认知和微生物群的长期影响对于改善患者的治疗结果至关重要.
研究的目的:
- 调查循环胺,甲基和5-甲 (CMF) 化疗引起的长期认知障碍背后的机制.
- 评估CMF治疗对肠道微生物组组成的影响.
- 探索CMF诱导的认知缺陷与突触可塑性标记物的变化之间的关系.
主要方法:
- 雌性小鼠每周接受四周的CMF化疗.
- 使用莫里斯水迷宫评估空间记忆.
- 分析海马组织,以检测即时早期基因表达 (IEG) (c-Fos,Arc,Zif286) 通过西式斑点检测.
- 用16S rRNA基因测序分析了便样本以检测微生物社区的组成.
主要成果:
- 在小鼠中,CMF治疗显著损害了空间记忆性能.
- 在海马体中,即时早期基因c-Fos,Arc和Zif286的表达在CMF治疗后显著减少.
- 虽然肠道微生物群的α多样性没有显著差异,但β多样性指标 (Jaccard,Unweighted Unifrac) 显著改变.
结论:
- 化疗诱导的认知障碍与IEG表达的减少有关,这表明突触可塑性受损和长期强化.
- 肠道微生物组β多样性的改变可能在CMF治疗后观察到的长期认知缺陷中起作用.
- 这些发现提供了关于化学大脑底层机制的见解,并建议治疗干预的潜在目标.
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