Galli, Jasmin; Almiñana, Carmen; Wiesendanger, Mahesa; Schuler, Gerhard; Kowalewski, Mariusz Pawel; Klisch, Karl (2024). Bovine placental extracellular vesicles carry the fusogenic syncytin BERV-K1. Theriogenology, 223, pp. 59-69. Elsevier 10.1016/j.theriogenology.2024.04.012
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Syncytins are endogenous retroviral envelope proteins which induce the fusion of membranes. A human representative of this group, endogenous retrovirus group W member 1 envelope (ERVW-1) or syncytin-1 is present in trophoblast-derived extracellular vesicles and supports the incorporation of these extracellular vesicles into recipient cells. During pregnancy, placenta-derived extracellular vesicles participate in feto-maternal communication. Bovine fetal binucleate trophoblast cells express the syncytin, bovine endogenous retroviral envelope protein K1 (BERV-K1). These cells release extracellular vesicles into the maternal stroma, but it is unclear whether BERV-K1 is included in these extracellular vesicles. Here, extracellular vesicles were isolated from bovine placental tissue using collagenase digestion, ultracentrifugation, and size exclusion chromatography. They were characterized with transmission electron microscopy, nanoparticle tracking analysis, immunoblotting and mass spectrometry. Immunohistochemistry and immunoelectron microscopy were used to localize BERV-K1 within the bovine placental tissue. The isolated extracellular vesicles range between 50 and 300 nm, carrying multiple extracellular vesicle biomarkers. Proteomic analysis and immunoelectron microscopy confirmed BERV-K1 presence on the isolated extracellular vesicles. Further, BERV-K1 was localized on intraluminal vesicles in secretory granules of binucleate trophoblast cells. The presence of BERV-K1 on bovine placental extracellular vesicles suggests their role in feto-maternal communication and potential involvement of BERV-K1 in uptake of extracellular vesicles by target cells.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Anatomy 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) |
Graduate School: |
Graduate School for Cellular and Biomedical Sciences (GCB) |
UniBE Contributor: |
Klisch, Karl Rüdiger |
Subjects: |
500 Science > 570 Life sciences; biology 600 Technology > 630 Agriculture |
ISSN: |
1879-3231 |
Publisher: |
Elsevier |
Language: |
English |
Submitter: |
Pubmed Import |
Date Deposited: |
29 Apr 2024 16:30 |
Last Modified: |
22 May 2024 08:55 |
Publisher DOI: |
10.1016/j.theriogenology.2024.04.012 |
PubMed ID: |
38678697 |
Uncontrolled Keywords: |
Binucleate trophoblast giant cells Bovine endogenous retroviral envelope protein K1 Bovine placenta Extracellular vesicles Feto-maternal communication Syncytin |
BORIS DOI: |
10.48350/196345 |
URI: |
https://boris.unibe.ch/id/eprint/196345 |
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