Mechanism of trifluoromethionine resistance in Entamoeba histolytica
| Autor: | Atsushi Furukawa, Gil M. Penuliar, Tomoyoshi Nozaki, Dan Sato |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Microbiology (medical)
Blotting Western Antiprotozoal Agents Drug Resistance Virulence Paromomycin CHO Cells Drug resistance Microbiology Entamoeba histolytica Cricetulus Methionine Chloroquine Cricetinae parasitic diseases Cell Adhesion medicine Animals Gene silencing Pharmacology (medical) Gene Silencing Cell adhesion Electrophoresis Agar Gel Pharmacology biology Reverse Transcriptase Polymerase Chain Reaction biology.organism_classification Molecular biology Culture Media Carbon-Sulfur Lyases Kinetics Cytolysis Infectious Diseases Gene Expression Regulation medicine.drug |
| Zdroj: | Journal of Antimicrobial Chemotherapy. 66:2045-2052 |
| ISSN: | 1460-2091 0305-7453 |
| DOI: | 10.1093/jac/dkr238 |
| Popis: | OBJECTIVES To determine the mechanism of trifluoromethionine resistance in Entamoeba histolytica and evaluate the impact of acquired drug resistance on virulence. METHODS Trifluoromethionine-resistant amoebae were selected in vitro and examined for cross-resistance to antiamoebic drugs, stability of resistance, methionine γ-lyase (MGL) activity, cell adhesion and virulence. Targeted gene silencing was performed to confirm the role of EhMGL. RESULTS Trophozoites with a resistance index of 154 were obtained. The cells were susceptible to chloroquine, metronidazole, paromomycin and tinidazole, but remained resistant to trifluoromethionine in the absence of drug pressure. A complete lack of EhMGL activity accompanied by increased adhesion and decreased cytolysis were also observed. Silencing of the EhMGL genes resulted in trifluoromethionine resistance. CONCLUSIONS This study provides the first demonstration of trifluoromethionine resistance in a parasitic protozoon. Repression of gene expression of drug targets represents a novel mechanism of resistance in E. histolytica. The information obtained from this work should help further development of trifluoromethionine derivatives that have lower chances of inducing resistance. |
| Databáze: | OpenAIRE |
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