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Parasitology Research

, Volume 118, Issue 2, pp 715–721 | Cite as

Double-stranded RNA reduces growth rates of the gut parasite Crithidia mellificae

  • Kleber de Sousa PereiraEmail author
  • Niels Piot
  • Guy Smagghe
  • Ivan MeeusEmail author
Treatment and Prophylaxis - Short Communication

Abstract

Parasites of managed bees can disrupt the colony success of the host, but also influence local bee-parasite dynamics, which is regarded as a threat for wild bees. Therapeutic measures have been suggested to improve the health of managed bees, for instance, exploiting the bees’ RNA interference (RNAi) pathway to treat against viral pathogens. Gut trypanosomes are an important group of bee parasites in at least two common managed bee species, i.e., managed Apis mellifera and reared Bombus terrestris. In several trypanosomes, RNAi activity is present, while in other associated genes of RNAi, such as Dicer-like (DCL) and Argonaute (AGO), it is lost. Up to date, the ability to exploit the RNAi of gut trypanosomes of bees has remained unexplored. Here, we screened parasite genomes of two honey bee protozoa (Crithidia mellificae and Lotmaria passim) and two bumble bee protozoa (Crithidia bombi and Crithidia expoeki) for the presence of DCL and AGO proteins. For C. mellificae, we constructed a double-stranded RNA (dsRNA) targeting kinetoplastid membrane protein-11 (KMP-11) to test the RNAi potential to kill this parasite. Transfection with KMP-11 dsRNA, but also adding it to the growth medium resulted in small growth reduction of the trypanosome C. mellificae, thereby showing the limited potential to apply dsRNA therapeutics to control trypanosome infection in managed honey bee species. Within bumble bees, there seems to be no application potentials against C. bombi, as we could only retrieve non-functional DCL- and AGO-related genes within the genome of this bumble bee parasite.

Keywords

dsRNA Honey bee gut parasite Managed bee Parasite control Prevention RNAi 

Notes

Acknowledgments

The authors thank the Laboratory of Phytopathology of Ghent University for the use of the electroporation apparatus.

Fundingsources

This study was supported by the National Council of Scientific and Technological Development (CNPq) of Brazil and the Research Foundation-Flanders (FWO-Vlaanderen).

Compliance with ethical standards

Conflict of interest

The authors declare that there is no conflict of interest.

Supplementary material

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of Bioscience Engineering, Department of Plants and Crops, Lab of AgrozoologyGhent UniversityGhentBelgium

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