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Article

Small Interfering RNAs Are Highly Effective Inhibitors of Crimean-Congo Hemorrhagic Fever Virus Replication In Vitro

by
Fanni Földes
1,2,
Mónika Madai
1,2,
Henrietta Papp
1,2,
Gábor Kemenesi
1,2,
Brigitta Zana
1,2,
Lili Geiger
3,
Katalin Gombos
3,
Balázs Somogyi
1,
Ildikó Bock-Marquette
4 and
Ferenc Jakab
1,2,*
1
National Laboratory of Virology, BSL-4 Laboratory, Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
2
Institute of Biology, Faculty of Sciences, University of Pécs, 7622 Pécs, Hungary
3
Department of Laboratory Medicine, Medical School, University of Pécs, 7624 Pécs, Hungary
4
Regenerative Science, Sport and Medicina Research Group, Szentágothai Research Centre, University of Pécs, 7624 Pécs, Hungary
*
Author to whom correspondence should be addressed.
Molecules 2020, 25(23), 5771; https://doi.org/10.3390/molecules25235771
Submission received: 6 November 2020 / Revised: 26 November 2020 / Accepted: 4 December 2020 / Published: 7 December 2020
(This article belongs to the Special Issue Antiviral Agents for RNA-Virus Infection)
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Abstract

Crimean-Congo hemorrhagic fever virus (CCHFV) is one of the prioritized diseases of the World Health Organization, considering its potential to create a public health emergency and, more importantly, the absence of efficacious drugs and/or vaccines for treatment. The highly pathogenic characteristic of CCHFV restricts research to BSL-4 laboratories, which complicates effective research and developmental strategies. In consideration of antiviral therapies, RNA interference can be used to suppress viral replication by targeting viral genes. RNA interference uses small interfering RNAs (siRNAs) to silence genes. The aim of our study was to design and test siRNAs in vitro that inhibit CCHFV replication and can serve as a basis for further antiviral therapies. A549 cells were infected with CCHFV after transfection with the siRNAs. Following 72 h, nucleic acid from the supernatant was extracted for RT Droplet Digital PCR analysis. Among the investigated siRNAs we identified effective candidates against all three segments of the CCHF genome. Consequently, blocking any segment of CCHFV leads to changes in the virus copy number that indicates an antiviral effect of the siRNAs. In summary, we demonstrated the ability of specific siRNAs to inhibit CCHFV replication in vitro. This promising result can be integrated into future anti-CCHFV therapy developments.
Keywords: CCHFV; Nairovirus; siRNA; RNA interference; gene silencing CCHFV; Nairovirus; siRNA; RNA interference; gene silencing

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MDPI and ACS Style

Földes, F.; Madai, M.; Papp, H.; Kemenesi, G.; Zana, B.; Geiger, L.; Gombos, K.; Somogyi, B.; Bock-Marquette, I.; Jakab, F. Small Interfering RNAs Are Highly Effective Inhibitors of Crimean-Congo Hemorrhagic Fever Virus Replication In Vitro. Molecules 2020, 25, 5771. https://doi.org/10.3390/molecules25235771

AMA Style

Földes F, Madai M, Papp H, Kemenesi G, Zana B, Geiger L, Gombos K, Somogyi B, Bock-Marquette I, Jakab F. Small Interfering RNAs Are Highly Effective Inhibitors of Crimean-Congo Hemorrhagic Fever Virus Replication In Vitro. Molecules. 2020; 25(23):5771. https://doi.org/10.3390/molecules25235771

Chicago/Turabian Style

Földes, Fanni, Mónika Madai, Henrietta Papp, Gábor Kemenesi, Brigitta Zana, Lili Geiger, Katalin Gombos, Balázs Somogyi, Ildikó Bock-Marquette, and Ferenc Jakab. 2020. "Small Interfering RNAs Are Highly Effective Inhibitors of Crimean-Congo Hemorrhagic Fever Virus Replication In Vitro" Molecules 25, no. 23: 5771. https://doi.org/10.3390/molecules25235771

APA Style

Földes, F., Madai, M., Papp, H., Kemenesi, G., Zana, B., Geiger, L., Gombos, K., Somogyi, B., Bock-Marquette, I., & Jakab, F. (2020). Small Interfering RNAs Are Highly Effective Inhibitors of Crimean-Congo Hemorrhagic Fever Virus Replication In Vitro. Molecules, 25(23), 5771. https://doi.org/10.3390/molecules25235771

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