Local Analysis of Heterogeneous Intracellular Transport: Slow and Fast Moving Endosomes.

Local Analysis of Heterogeneous Intracellular Transport: Slow and Fast Moving Endosomes.
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DOI:
10.3390/e23080958
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发表时间:
2021-07-27
期刊:
Entropy (Basel, Switzerland)
影响因子:
--
通讯作者:
Waigh TA
Waigh TA
中科院分区:
其他
文献类型:
--
作者:
Korabel N;Han D;Taloni A;Pagnini G;Fedotov S;Allan V;Waigh TA

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Trajectories of endosomes inside living eukaryotic cells are highly heterogeneous in space and time and diffuse anomalously due to a combination of viscoelasticity, caging, aggregation and active transport. Some of the trajectories display switching between persistent and anti-persistent motion, while others jiggle around in one position for the whole measurement time. By splitting the ensemble of endosome trajectories into slow moving subdiffusive and fast moving superdiffusive endosomes, we analyzed them separately. The mean squared displacements and velocity auto-correlation functions confirm the effectiveness of the splitting methods. Applying the local analysis, we show that both ensembles are characterized by a spectrum of local anomalous exponents and local generalized diffusion coefficients. Slow and fast endosomes have exponential distributions of local anomalous exponents and power law distributions of generalized diffusion coefficients. This suggests that heterogeneous fractional Brownian motion is an appropriate model for both fast and slow moving endosomes. This article is part of a Special Issue entitled: “Recent Advances In Single-Particle Tracking: Experiment and Analysis” edited by Janusz Szwabiński and Aleksander Weron.
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