单个外体度测量揭示了细胞间通信的化学信使封装
Keke Hu1, Kim Long Le Vo2, Fan Wang1
1Department of Chemistry, College of Chemistry & Chemical Engineering, Xiamen University, Xiamen 361005, China.
Journal of the American Chemical Society
|May 19, 2023
概括
神经内分泌细胞释放含有甲基胺传递体的外体,挑战传统的外细胞模型. 这一发现揭示了通过外体封装的信使进行细胞通信的新途径.
科学领域:
- 神经生物学
- 细胞生物学
- 生物化学
背景情况:
- 细胞通过化学信号进行通信,主要是通过囊泡外细胞.
- 外体是细胞外囊泡, 对于细胞间的通信至关重要.
- 之前的研究在实时监测外体细胞释放方面遇到了局限性.
研究的目的:
- 研究单个外体的实时释放和分子含量.
- 区分外体释放与大密核囊泡 (LDCV) 的分泌.
- 探索神经内分泌细胞中化学交流的新机制.
主要方法:
- 使用微电极的电流计量用于实时监测单个外体释放.
- 开发了将外体与其他细胞外囊 (EV) 区分开来的技术.
- 分析和区分外体内和LDCVs分泌的分子.
主要成果:
- 证明神经内分泌细胞释放含有甲醇胺传递体的外体.
- 展示了一种捕获动态单外体释放的新方法.
- 在外体内鉴定出类似于LDCV和突触囊中的甲基胺.
结论:
- 异构体代表着一种独特的化学通讯途径,
- 这一发现挑战了神经内分泌细胞和神经元中的异位细胞的正统观点.
- 开辟了对神经内分泌和中枢神经系统外体功能的新研究途径.
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