在认知完整的老年人中,血液转录组的长度APOE4和粉样蛋白依赖的变化
Emma S Luckett1,2,3, Magdalena Zielonka2,4, Amine Kordjani3
1Laboratory for Cognitive Neurology, Leuven Brain Institute, KU Leuven, Leuven, 3000, Belgium.
Alzheimer's research & therapy
|July 12, 2023
概括
纵向基因表达的变化揭示了早期阿尔茨海默病 (AD) 在认知完整的个体中的分子变化. APOE4载体和粉样积聚体显示免疫,代谢和蛋白质清除途径被破坏,提供了新的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 基因组学就是基因组学.
- 生物化学 生物化学
背景情况:
- 阿尔茨海默病 (AD) 的特点是,在大脑和血液中,基因表达失调.
- 在认知健康的个体中研究外围基因表达可以揭示症状出现之前的早期分子变化.
研究的目的:
- 为了确定认知健康个体的外周血液中的纵向基因 (协同表达) 变化.
- 为了将这些变化与阿尔茨海默病风险因素相关联,例如APOE4载体状态和粉样蛋白积累.
主要方法:
- 在基线和随访期间,对65名参与者的血液样本进行了RNA测序.
- 进行了差异基因表达和加权基因共同表达网络分析.
- 分析按APOE4状态,粉样蛋白积累 (通过PET扫描评估) 和粉样蛋白阳性分层.
主要成果:
- APOE4载体表现出显著的纵向基因表达变化,包括上调的线粒体,代谢和核糖体路径.
- 粉样蛋白积聚体显示出不同的基因表达特征,具有高调节的新陈代谢和焦点粘附路径.
- 基因共同表达网络分析揭示了与蛋白质体蛋白质代谢,髓状细胞发育和细胞质翻译相关的模块,与粉样状况和APOE4载体状况相关.
结论:
- 在认知完整的个体中,纵向基因表达分析揭示了AD病理生理学的早期分子标志.
- 免疫系统功能,蛋白质清除和新陈代谢的干扰在患有AD风险因素的个体中是明显的.
- 这些发现提供了对阿尔茨海默病变的洞察力,并确定了早期治疗干预的潜在目标.
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