与年龄相关的皮质相似性网络与特定细胞类型的转录特征相关
Jinpeng Niu1,2, Qing Jiao1,2, Dong Cui1,2
1Department of Radiology, The Second Affiliated Hospital of Shandong First Medical University, Tai'an 271000, China.
Cerebral cortex (New York, N.Y. : 1991)
|December 1, 2023
概括
大脑衰老会改变皮质结构,影响认知. 大脑细胞中的基因表达变化与这些结构变化相关,为认知衰退机制提供了洞察力.
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.
- 衰老研究研究 衰老研究
背景情况:
- 人类大脑结构在衰老过程中异质地发生变化,影响认知.
- 与年龄相关的皮质结构变化和基因转录之间的联系尚未得到充分理解.
研究的目的:
- 为了研究皮质形态度相似性网络和老年成年人大脑基因转录模式之间的关系.
- 确定与年龄相关的认知衰退背后的分子和细胞基质.
主要方法:
- 利用两个独立队列 (剑桥衰老和神经科学中心和达拉斯寿命大脑研究) 的结构磁共振成像 (MRI) 数据.
- 分析了转录组数据与MRI数据一起,以检查皮质形态学相似性和基因表达之间的相关性.
- 研究了天体细胞,微质细胞和神经元细胞中的基因转录特征.
主要成果:
- 在形态相似性网络中确定了可复制的与年龄相关的模式:认知区域 (上额,) 的相似性下降,感觉运动区域 (后中心,侧) 的相似性增加.
- 在形态学网络变化和与年龄相关的基因表达之间发现了显著的空间相关性,特别是那些参与突触功能的人.
- 观察到天体细胞,微质细胞和神经元的转录变化解释了大多数与年龄相关的网络变化.
结论:
- 皮质结构的与年龄相关的变化与特定的基因转录特征有关,特别是影响突触过程的基因转录特征.
- 突触异常被认为是与年龄相关的认知衰退的一个关键因素.
- 研究结果表明,通过解决老化大脑中的细胞和分子变化来减轻认知衰退的潜在治疗目标.
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