Please use this identifier to cite or link to this item: doi:10.22028/D291-30229
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Title: Vimentin provides the mechanical resilience required for amoeboid migration and protection of the nucleus
Author(s): Stankevicins, Luiza Da Cunha
Urbanska, Marta
Flormann, Daniel AD.
Terriac, Emmanuel
Mostajeran, Zahra
Gad, Annica K. B.
Cheng, Fang
Eriksson, John E.
Lautenschläger, Franziska
Language: English
Publisher/Platform: bioRxiv
Year of Publication: 2019
Publikation type: Other
Abstract: Dendritic cells use amoeboid migration through constricted passages to reach the lymph nodes, and this homing function is crucial for immune responses. Amoeboid migration requires mechanical resilience, however, the underlying molecular mechanisms for this type of migration remain unknown. Because vimentin intermediate filaments (IFs) and microfilaments regulate adhesion-dependent migration in a bidirectional manner, we analyzed if they exert a similar control on amoeboid migration. Vimentin was required for cellular resilience, via a joint interaction between vimentin IFs and F-actin. Reduced actin mobility in the cell cortex of vimentin-reduced cells indicated that vimentin promotes Factin subunit exchange and dynamics. These mechano-dynamic alterations in vimentin-deficient dendritic cells impaired amoeboid migration in confined environments in vitro and blocked lymph node homing in mouse experiments in vivo. Correct nuclear positioning is important in confined amoeboid migration both to minimize resistance and to avoid DNA damage. Vimentin-deficiency also led to DNA double strand breaks in the compressed dendritic cells, pointing to a role of vimentin in nuclear positioning. Together, these observations show that vimentin IF-microfilament interactions provide both the specific mechano-dynamics required for dendritic cell migration and the protection the genome needs in compressed spaces.Summary statement Vimentin — in joint action with actin — mediates the mechanical stiffness of cells required for amoeboid cell migration through confined spaces and protects the nucleus from DNA damage.
DOI of the first publication: 10.1101/720946
URL of the first publication: https://www.biorxiv.org/content/10.1101/720946v1
Link to this record: hdl:20.500.11880/28690
http://dx.doi.org/10.22028/D291-30229
Date of registration: 13-Feb-2020
Notes: Preprint
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Physik
Professorship: NT - Jun.-Prof. Dr. Franziska Lautenschläger
Collections:UniBib – Die Universitätsbibliographie

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