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相关概念视频

Feedback Regulation of Calcium Concentration01:27

Feedback Regulation of Calcium Concentration

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Calcium is an essential signaling molecule required for various cellular functions. Calcium pumps and ion channels on cell and organellar membranes, such as those on the endoplasmic reticulum (ER), regulate calcium concentrations inside the cell. They remain closed, keeping the cytosolic calcium levels low at a resting state.
Various transmembrane receptors, such as G protein-coupled receptors (GPCRs), elicit a response to extracellular signals by increasing cytosolic calcium. Activated GPCRs...
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相关实验视频

Updated: Mar 24, 2026

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons
11:35

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons

Published on: October 29, 2011

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使用可见光进行释

Hitesh K Agarwal1, Radoslav Janicek2, San-Hui Chi3

  • 1Department of Neuroscience, Mount Sinai School of Medicine , New York, New York 10029, United States.

Journal of the American Chemical Society
|March 15, 2016
PubMed
概括
此摘要是机器生成的。

研究人员为可见光开发了一种新型的酸芳香光化学保护组, 这种"子"分子能够在心肌细胞中快速地释放局部离子,用于研究细胞信号.

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Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons
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In Vivo Calcium Imaging in C. elegans Body Wall Muscles
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Last Updated: Mar 24, 2026

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons
11:35

Flash Photolysis of Caged Compounds in the Cilia of Olfactory Sensory Neurons

Published on: October 29, 2011

13.3K
Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons
10:29

Multi-photon Intracellular Sodium Imaging Combined with UV-mediated Focal Uncaging of Glutamate in CA1 Pyramidal Neurons

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In Vivo Calcium Imaging in C. elegans Body Wall Muscles
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In Vivo Calcium Imaging in C. elegans Body Wall Muscles

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科学领域:

  • 摄影化学
  • 分子生物学
  • 生物物理

背景情况:

  • 光化学保护组是用光控制生物过程的关键工具.
  • 现有的方法往往缺乏效率或需要紫外线,从而限制了它们的生物应用.
  • 对细胞内 (Ca2+) 信号的精确控制对于了解细胞功能至关重要.

研究的目的:

  • 设计和合成可见光激活的新型酸芳香光化学保护组.
  • 开发一个"子"探测器,利用这个新的保护组对Ca2+释放进行时空控制.
  • 在心脏肌细胞中研究光诱导的Ca2+释放的生理效应.

主要方法:

  • 作为可见光吸收染色体的双二衍生物 (BIST) 的合成.
  • 将BIST与Ca2+化剂结合,形成一个"子"分子.
  • 在小鼠心肌细胞中应用激光闪光光解和贴片技术.
  • 使用1和2光子解用于Ca2+释放和随后的信号分析.

主要成果:

  • BIST染色体表现出强烈的可见光吸收 (ε440 = 66,000 M(-1) cm(-1)) 和高效的两光子吸收.
  • 分子在激光闪光光解时迅速释放Ca2+ (<0.2毫秒).
  • 一和两光子释放成功诱导心肌细胞中的局部和全细胞生理Ca2+信号事件.

结论:

  • 一种新型,高效的可见光激活的酸芳香光化学保护组 (BIST) 已经开发出来.
  • 基于BIST的"化"探测器可以快速精确地控制Ca2+信号.
  • 这项技术为研究心肌细胞等复杂生物系统的Ca2+动态提供了强大的工具.