Acanthamoeba mauritaniensis genotype T4D: An environmental isolate displays pathogenic behavior
| Autor: | Mineko Shibayama, Jesús Serrano-Luna, Libia Zulema Rodriguez-Anaya, Angélica Silva-Olivares, Federico Castro-Muñozledo, Daniel Coronado-Velázquez, Luis Fernando Lares-Jiménez |
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| Rok vydání: | 2020 |
| Předmět: |
0301 basic medicine
Proteases Genotype medicine.medical_treatment 030231 tropical medicine Virulence Acanthamoeba Madin Darby Canine Kidney Cells Microbiology 03 medical and health sciences chemistry.chemical_compound Dogs 0302 clinical medicine parasitic diseases medicine Animals Granulomatous amoebic encephalitis Cytopathic effect Tight Junction Proteins Protease biology Epithelial Cells 030108 mycology & parasitology medicine.disease biology.organism_classification Infectious Diseases chemistry Acanthamoeba castellanii Parasitology Serine Proteases PMSF |
| Zdroj: | Parasitology International. 74:102002 |
| ISSN: | 1383-5769 |
| DOI: | 10.1016/j.parint.2019.102002 |
| Popis: | Acanthamoeba spp. are free-living amoebae with a worldwide distribution. These amoebae can cause granulomatous amoebic encephalitis and amoebic keratitis in humans. Proteases are considered virulence factors in pathogenic Acanthamoeba. The objective of this study was to evaluate the behavior of Acanthamoeba mauritaniensis, a nonpathogenic amoeba. We analyzed the cytopathic effect of A. mauritaniensis on RCE1(5 T5) and MDCK cells and compared it to that of Acanthamoeba castellanii. A partial biochemical characterization of proteases was performed in total crude extracts (TCE) and conditioned medium (CM). Finally, we evaluated the effect of proteases on tight junction (TJ) proteins and the transepithelial electrical resistance of MDCK cells. The results showed that this amoeba can induce substantial damage to RCE1(5T5) and MDCK cells. Moreover, the zymograms and Azocoll assays of amoebic TCE and CM revealed different protease activities, with serine proteases being the most active. Furthermore, A. mauritaniensis induced the alteration and degradation of MDCK cell TJ proteins with serine proteases. After genotyping this amoeba, we determined that it is an isolate of Acanthamoeba genotype T4D. From these data, we suggest that A. mauritaniensis genotype T4D behaves similarly to the A. castellanii strain. |
| Databáze: | OpenAIRE |
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