Suitable in vitro Eimeria arloingi macromeront formation in host endothelial cells and modulation of adhesion molecule, cytokine and chemokine gene transcription

Eimeria arloingi infections can cause severe haemorrhagic enteritis in young goat kids, thereby leading to high economic losses in goat industry worldwide. We aimed to isolate a new E. arloingi strain and establish a suitable in vitro culture system for the first merogony. E. arloingi oocysts were c...

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Bibliographic Details
Published in:Parasitology research (1987) 2015-01, Vol.114 (1), p.113-124
Main Authors: Silva, Liliana M. R, Vila-Viçosa, Maria J. M, Cortes, Helder C. E, Taubert, Anja, Hermosilla, Carlos
Format: Article
Language:English
Subjects:
Animals
Biomedical and Life Sciences
Biomedicine
Cattle
Cell adhesion
Cell Adhesion Molecules - genetics
Cell Adhesion Molecules - metabolism
Cells, Cultured
Chemokines
Coccidiosis - parasitology
Eimeria
Eimeria - cytology
Eimeria - physiology
endothelial cells
Endothelial Cells - parasitology
excystation
Gene Expression Regulation
Genetic aspects
Genetic transcription
granulocyte-macrophage colony-stimulating factor
Health aspects
hemorrhagic enteritis
Host-parasite relationships
Humans
Identification and classification
Immunology
in vitro culture
industry
kids (goats)
Medical Microbiology
merozoites
Microbiology
oocysts
Oocysts - physiology
Original Paper
parasites
Sporozoa
sporozoites
Sporozoites - immunology
transcription (genetics)
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Summary:Eimeria arloingi infections can cause severe haemorrhagic enteritis in young goat kids, thereby leading to high economic losses in goat industry worldwide. We aimed to isolate a new E. arloingi strain and establish a suitable in vitro culture system for the first merogony. E. arloingi oocysts were collected from naturally infected goat kids in the province of Alentejo, Portugal. For the maintenance of E. arloingi (strain A), kids kept under strict parasite-free conditions were orally infected with 10³sporulated oocysts each. Further, a new excystation protocol was successfully established to obtain viable sporozoites for further in vitro development in primary bovine umbilical vein endothelial cells (BUVEC). Overall, E. arloingi first merogony was successfully accomplished in BUVEC leading to macromeront formation (up to 150 μm) and the release of fully developed merozoites I stages. Moreover, host endothelial cell-parasite interactions were investigated in order to determine the extent of modulation carried out by E. arloingi in BUVEC during the first merogony. Gene transcription of adhesion molecules (E-selectin, P-selectin, VCAM-1, ICAM-1) was enhanced in the first hours post-infection (p.i.) in E. arloingi-infected BUVEC. BUVEC activation due to invasion was also shown by increased chemokine (CXCL8, CCL2, CCL5), cytokine (GM-CSF) and COX-2 gene transcription. The new E. arloingi (strain A) will be useful for better comprehension of early host innate immune reactions against this parasite in vitro/in vivo as well as to further our investigations in the complex Eimeria-host endothelial cell interactions.
ISSN:0932-0113
1432-1955
DOI:10.1007/s00436-014-4166-4