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Bacterial extracellular vesicles exploit filopodial surfing and retraction mechanisms to reach the host cell body in an actin-dependent manner
Umeå universitet, Medicinska fakulteten, Institutionen för medicinsk kemi och biofysik. Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, KUST, Kohat, Pakistan.
Umeå universitet, Medicinska fakulteten, Institutionen för medicinsk kemi och biofysik.ORCID-id: 0000-0003-0364-8964
Umeå universitet, Medicinska fakulteten, Institutionen för molekylärbiologi (Medicinska fakulteten).ORCID-id: 0000-0002-1439-6216
Division of Microbiology, Department of Biology, Friedrich-Alexander-Universität Erlangen-Nurnberg, Erlangen, Germany.
Vise andre og tillknytning
2025 (engelsk)Inngår i: Journal of Extracellular Vesicles, E-ISSN 2001-3078, Vol. 14, nr 6, artikkel-id e70107Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Extracellular vesicles derived from gram-negative bacteria are nano-sized particles of different size and origin released by these microbes and are collectively called bacterial extracellular vesicles (BEVs). These BEVs may serve as vehicles for delivering bacterial molecules to eukaryotic host cells. Depending on the bacterial species, BEVs elicit various host cellular and immunomodulatory responses, often aiding bacterial survival and communication. Early events in the initial interaction between BEVs and the host cell, as well as how BEVs reach the cell body, remain unexplored. In this study, we describe the interaction of BEVs with actin-rich cellular extensions, including filopodia and retraction fibres, which extend from the host cell surface. Using microscopy-based tracking at the single cell level, BEVs were shown to exploit cellular extensions at the cell periphery to reach the main cell body, either by hijacking retracted extensions or by surfing along these extensions in an actin-dependent manner. BEVs bind to the outer surface of the extensions, but no internalization occurs at this stage. Instead, they serve as transport for BEVs to the main cell body, where endocytosis takes place. Importantly, this process appears to be a general phenomenon for BEVs across different bacterial species and cell origins.

sted, utgiver, år, opplag, sider
John Wiley & Sons, 2025. Vol. 14, nr 6, artikkel-id e70107
Emneord [en]
bacterial extracellular vesicles (BEVs), extracellular processing, filopodia and cellular extensions
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-242114DOI: 10.1002/jev2.70107ISI: 001512969000001PubMedID: 40545962Scopus ID: 2-s2.0-105009641411OAI: oai:DiVA.org:umu-242114DiVA, id: diva2:1983292
Forskningsfinansiär
Swedish Cancer Society, 22 2382 PjSwedish Cancer Society, 24 3796 PjUmeå UniversityCancerforskningsfonden i NorrlandTilgjengelig fra: 2025-07-10 Laget: 2025-07-10 Sist oppdatert: 2025-07-10bibliografisk kontrollert

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Ur Rehman, ZiaObi, IkennaNadeem, AftabArnqvist, Anna

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