单个前突触的跨物种比较分析
Eloïse Berson1,2, Chandresh R Gajera1, Thanaphong Phongpreecha1,2
1Department of Pathology, Stanford University, 300 Pasteur Dr., Stanford, CA, 94304, USA.
Scientific reports
|August 24, 2023
概括
通过使用飞行时间 (SynTOF) 的突触测量来比较物种间的大脑突触前分子概况,发现了明显的灵长类动物和小鼠差异. 人类和的脑突触显示出明显的重叠,特别是在大脑皮层.
科学领域:
- 神经科学是一个神经科学.
- 蛋白质组学是指蛋白质组学.
- 计算生物学 计算生物学
背景情况:
- 对不同物种和区域的大脑结构的比较分析对于理解功能洞察至关重要.
- 基于质量细胞计的方法,如飞行时间的协同测量 (SynTOF) 提供了新的方法来分析细胞组件.
研究的目的:
- 开发一个统一的,无监督的框架来比较跨物种和大脑区域的单个前突触分子丰度.
- 利用SynTOF数据和机器学习来分析数百万个单一的前突触.
主要方法:
- 应用了无监督机器学习方法,利用神经网络,分析高维 SynTOF 数据.
- 我们比较了来自人类,和老鼠样本的超过450万个单个前突触的分子概况,这些样本来自三个大脑区域.
- 验证了使用SynTOF分析进行跨物种比较的可行性.
主要成果:
- 在灵长类动物 (人,) 和小鼠前突触分子形状之间实现了近乎完全的分离.
- 确定了区分灵长类动物和小鼠的关键生物过程,包括突触修剪,细胞能量,脂质代谢和神经传递.
- 揭示了大脑皮层和神经体中人类和子样本之间的前突触组成的实质性重叠.
结论:
- 结合无监督机器学习的 SynTOF 分析,为跨物种的突触前比较提供了一个强大的工具.
- 在前突触分子组成中存在显著的物种特异性变异,特别是在灵长类动物和动物之间.
- 灵长类动物的大脑突触在特定的大脑区域,如大脑皮层,表现出保留的分子特征.
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