Chemo-mechanical diffusion waves explain collective dynamics of immune cell podosomes.

Chemo-mechanical diffusion waves explain collective dynamics of immune cell podosomes.
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DOI:
10.1038/s41467-023-38598-z
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发表时间:
2023-05-22
影响因子:
16.6
通讯作者:
Shenoy, Vivek B.
Shenoy, Vivek B.
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Gong, Ze;van den Dries, Koen;Migueles-Ramirez, Rodrigo A.;Wiseman, Paul W.;Cambi, Alessandra;Shenoy, Vivek B.

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Immune cells, such as macrophages and dendritic cells, can utilize podosomes, mechanosensitive actin-rich protrusions, to generate forces, migrate, and patrol for foreign antigens. Individual podosomes probe their microenvironment through periodic protrusion and retraction cycles (height oscillations), while oscillations of multiple podosomes in a cluster are coordinated in a wave-like fashion. However, the mechanisms governing both the individual oscillations and the collective wave-like dynamics remain unclear. Here, by integrating actin polymerization, myosin contractility, actin diffusion, and mechanosensitive signaling, we develop a chemo-mechanical model for podosome dynamics in clusters. Our model reveals that podosomes show oscillatory growth when actin polymerization-driven protrusion and signaling-associated myosin contraction occur at similar rates, while the diffusion of actin monomers drives wave-like coordination of podosome oscillations. Our theoretical predictions are validated by different pharmacological treatments and the impact of microenvironment stiffness on chemo-mechanical waves. Our proposed framework can shed light on the role of podosomes in immune cell mechanosensing within the context of wound healing and cancer immunotherapy. Dendritic cells can utilize the dynamics of podosomes to probe their microenvironment. Here, the authors propose a chemo-mechanical model for the height oscillations of individual podosomes and the collective wave dynamics in a podosome cluster.
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