Journal of Microbiology

, Volume 55, Issue 10, pp 783–791 | Cite as

Silencing the cleavage factor CFIm25 as a new strategy to control Entamoeba histolytica parasite

  • Juan David Ospina-Villa
  • Nancy Guillén
  • Cesar Lopez-Camarillo
  • Jacqueline Soto-Sanchez
  • Esther Ramirez-Moreno
  • Raul Garcia-Vazquez
  • Carlos A. Castañon-Sanchez
  • Abigail Betanzos
  • Laurence A. MarchatEmail author
Microbial Genetics, Genomics and Molecular Biology


The 25 kDa subunit of the Clevage Factor Im (CFIm25) is an essential factor for messenger RNA polyadenylation in human cells. Therefore, here we investigated whether the homologous protein of Entamoeba histolytica, the protozoan responsible for human amoebiasis, might be considered as a biochemical target for parasite control. Trophozoites were cultured with bacterial double-stranded RNA molecules targeting the EhCFIm25 gene, and inhibition of mRNA and protein expression was confirmed by RT-PCR and Western blot assays, respectively. EhCFIm25 silencing was associated with a significant acceleration of cell proliferation and cell death. Moreover, trophozoites appeared as larger and multinucleated cells. These morphological changes were accompanied by a reduced mobility, and erythrophagocytosis was significantly diminished. Lastly, the knockdown of EhCFIm25 affected the poly(A) site selection in two reporter genes and revealed that EhCFIm25 stimulates the utilization of downstream poly(A) sites in E. histolytica mRNA. Overall, our data confirm that targeting the polyadenylation process represents an interesting strategy for controlling parasites, including E. histolytica. To our best knowledge, the present study is the first to have revealed the relevance of the cleavage factor CFIm25 as a biochemical target in parasites.


amoebiasis gene knockdown polyadenylation protozoan parasite virulence 


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Copyright information

© The Microbiological Society of Korea and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Juan David Ospina-Villa
    • 1
  • Nancy Guillén
    • 2
  • Cesar Lopez-Camarillo
    • 3
  • Jacqueline Soto-Sanchez
    • 1
  • Esther Ramirez-Moreno
    • 1
  • Raul Garcia-Vazquez
    • 1
  • Carlos A. Castañon-Sanchez
    • 4
  • Abigail Betanzos
    • 5
  • Laurence A. Marchat
    • 1
    Email author
  1. 1.Instituto Politécnico Nacional — ENMHCiudad de MéxicoMexico
  2. 2.Institut PasteurUnité d’Analyses d’Images BiologiquesParisFrance
  3. 3.Universidad Autónoma de la Ciudad de México — Posgrado en Ciencias GenómicasCiudad de MéxicoMexico
  4. 4.Hospital Regional de Alta EspecialidadOaxacaMexico
  5. 5.Cátedras, CONACYT, Departamento de Infectómica y Patogénesis MolecularCINVESTAV-IPNCiudad de MéxicoMexico

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