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Ospina-Villa JD, Dufour A, Weber C, Ramirez-Moreno E, Zamorano-Carrillo A, Guillen N, Lopez-Camarillo C, Marchat LA. Targeting the polyadenylation factor EhCFIm25 with RNA aptamers controls survival in Entamoeba histolytica. Sci Rep 2018; 8:5720. [PMID: 29632392 PMCID: PMC5890266 DOI: 10.1038/s41598-018-23997-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 03/23/2018] [Indexed: 12/26/2022] Open
Abstract
Messenger RNA 3'-end polyadenylation is an important regulator of gene expression in eukaryotic cells. In our search for new ways of treating parasitic infectious diseases, we looked at whether or not alterations in polyadenylation might control the survival of Entamoeba histolytica (the agent of amoebiasis in humans). We used molecular biology and computational tools to characterize the mRNA cleavage factor EhCFIm25, which is essential for polyadenylation in E. histolytica. By using a strategy based on the systematic evolution of ligands by exponential enrichment, we identified single-stranded RNA aptamers that target EhCFIm25. The results of RNA-protein binding assays showed that EhCFIm25 binds to the GUUG motif in vitro, which differs from the UGUA motif bound by the homologous human protein. Accordingly, docking experiments and molecular dynamic simulations confirmed that interaction with GUUG stabilizes EhCFIm25. Incubating E. histolytica trophozoites with selected aptamers inhibited parasite proliferation and rapidly led to cell death. Overall, our data indicate that targeting EhCFIm25 is an effective way of limiting the growth of E. histolytica in vitro. The present study is the first to have highlighted the potential value of RNA aptamers for controlling this human pathogen.
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Affiliation(s)
- Juan David Ospina-Villa
- Instituto Politécnico Nacional, Escuela Nacional de Medicina y Homeopatía, Guillermo Massieu Helguera 239, Fracc. La Escalera Ticoman, CP 07320, Ciudad de México, Mexico
| | - Alexandre Dufour
- Institut Pasteur, Unité d'Analyse d'Images Biologiques, 25 Rue du Dr Roux, F-75015, Paris, France
- Centre National de la Recherche Scientifique CNRS UMR 3691, 25 Rue du Dr Roux, F-75015, Paris, France
| | - Christian Weber
- Centre National de la Recherche Scientifique CNRS UMR 3691, 25 Rue du Dr Roux, F-75015, Paris, France
- Institut Pasteur, Unité d'Imagerie et Modélisation, 28 rue du Docteur Roux, 75015, Paris, France
| | - Esther Ramirez-Moreno
- Instituto Politécnico Nacional, Escuela Nacional de Medicina y Homeopatía, Guillermo Massieu Helguera 239, Fracc. La Escalera Ticoman, CP 07320, Ciudad de México, Mexico
| | - Absalom Zamorano-Carrillo
- Instituto Politécnico Nacional, Escuela Nacional de Medicina y Homeopatía, Guillermo Massieu Helguera 239, Fracc. La Escalera Ticoman, CP 07320, Ciudad de México, Mexico
| | - Nancy Guillen
- Centre National de la Recherche Scientifique, CNRS-ERL9195, 25 Rue du Dr Roux, F-75015, Paris, France
| | - César Lopez-Camarillo
- Universidad Autónoma de la Ciudad de México, Posgrado en Ciencias Genómicas, San Lorenzo 290, Col. Del Valle, CP 03100, Ciudad de México, Mexico
| | - Laurence A Marchat
- Instituto Politécnico Nacional, Escuela Nacional de Medicina y Homeopatía, Guillermo Massieu Helguera 239, Fracc. La Escalera Ticoman, CP 07320, Ciudad de México, Mexico.
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