Abstract
The first merogony of Eimeria bovis takes place in lymphatic endothelial cells of the ileum, resulting in the formation of macromeronts up to 250 μm. In this study, we investigated the host cell cytoskeleton (actin filaments, microtubules, spectrin, vimentin intermediate filaments) associated with parasitic development in vitro by confocal laser scanning microscopy (CLSM) using primary bovine umbilical vein endothelial cells (BUVEC) and bovine spleen lymphatic endothelial cells (BSLEC) as host cells. No prominent changes in the host cell cytoskeleton were detected 1–3 days after E. bovis sporozoite invasion. With ongoing meront maturation a significant increase in microtubules and actin filaments close to the parasitophorous vacuole (PV) was found. Mature macromeronts within the PV were completely enclosed by these cytoskeletal elements. Our findings suggest, that in order to guarantee the survival of the host cell on the enlargement of macromeronts, E. bovis needs not only to augment but also to rearrange its cytoskeletal system.
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Abbreviations
- BSA:
-
bovine serum albumin
- BSLEC:
-
bovine spleen lymphatic endothelial cells
- BUVEC:
-
bovine umbilical vein endothelial cells
- CLSM:
-
confocal laser scanning microscopy
- DMSO:
-
dimethylsulphoxide
- ECGM:
-
endothelial cell growth medium
- FCS:
-
foetal calf serum
- PBS:
-
phosphate-buffered saline
- p. i.:
-
post-infection
- PV:
-
parasitophorous vacuole
- RT:
-
room temperature
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Acknowledgements
We acknowledge the kind supply of BSLEC by K. Preissner (Justus Liebig University Giessen) and of bovine umbilical cords by H. Bollwein and A. Koch (University of Veterinary Medicine Hannover). We are indebted to B. Hofmann, C. Scheld and M. Buss for their excellent technical assistance in cell culture. Further, we are grateful to K. Failing (Justus Liebig University Giessen) for support in statistical analyses of the data.
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Hermosilla, C., Schröpfer, E., Stowasser, M. et al. Cytoskeletal changes in Eimeria bovis-infected host endothelial cells during first merogony. Vet Res Commun 32, 521–531 (2008). https://doi.org/10.1007/s11259-008-9054-x
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DOI: https://doi.org/10.1007/s11259-008-9054-x