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使用隐藏马尔科夫模型对氧体轨迹的定量分析

Carl-Magnus Svensson¹, Katharina Reglinski^2,3,4,5, Wolfgang Schliebs⁶

¹Applied Systems Biology, Leibniz Institute for Natural Product Research and Infection Biology - Hans Knöll Institute, Jena, Germany.

Scientific reports

|November 11, 2023

概括

细胞器官的迁移,像过氧体一样,涉及随机和有针对性的运动. 这项研究量化了这些模式,揭示了PEX14的存在.

科学领域:

细胞生物学细胞生物学
生物物理学的生物物理.

背景情况:

分子扩散和器官的移动性对于细胞功能至关重要,需要分子和器官在细胞内相互作用.
由于分辨率和分析的局限性,观察和分析细胞迁移动态,特别是罕见的定向运动,具有挑战性.

研究的目的:

准确量化和分析活细胞内氧体的独特迁移模式.
研究氧体膜蛋白PEX14和微管相互作用在氧体导向迁移中的作用.

主要方法:

利用高分辨率的2D旋盘光显微镜捕捉数千个个体Peroxisomes的时间扩散轨迹.
应用了一个带有两个隐藏状态的隐藏马尔科夫模型,自动识别和量化定向迁移段.

主要成果:

证明过氧体表现出随机和有针对性的迁移,有针对性的运动与微管结合有关.
表明PEX14淘汰会通过降低微管结合概率来减少定向迁移,但不会消除它.
诺可达治疗,分解微管,有效地消除了指导性过氧体运动.

结论:

该研究提供了一种强大的方法来分析器官细胞迁移模式和切换动态.
确定PEX14是Peroxisome-microtubule结合和定向迁移的关键但不是唯一的因素.
突出了微管完整性在指导性有机细胞运输中的关键作用.

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相关概念视频

Peroxisomes

Peroxisomes

Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...