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Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes
The inland floodwater mosquito Aedes vexans (Meigen, 1830) is a competent vector of numerous arthropod-borne viruses such as Rift Valley fever virus (Phenuiviridae) and Zika virus (Flaviviridae). Aedes vexans spp. have widespread Afrotropical distribution and are common European cosmopolitan mosquit...
Autores principales: | , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7232509/ https://www.ncbi.nlm.nih.gov/pubmed/32295109 http://dx.doi.org/10.3390/v12040440 |
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author | Parry, Rhys Naccache, Fanny Ndiaye, El Hadji Fall, Gamou Castelli, Ilaria Lühken, Renke Medlock, Jolyon Cull, Benjamin Hesson, Jenny C. Montarsi, Fabrizio Failloux, Anna-Bella Kohl, Alain Schnettler, Esther Diallo, Mawlouth Asgari, Sassan Dietrich, Isabelle Becker, Stefanie C. |
author_facet | Parry, Rhys Naccache, Fanny Ndiaye, El Hadji Fall, Gamou Castelli, Ilaria Lühken, Renke Medlock, Jolyon Cull, Benjamin Hesson, Jenny C. Montarsi, Fabrizio Failloux, Anna-Bella Kohl, Alain Schnettler, Esther Diallo, Mawlouth Asgari, Sassan Dietrich, Isabelle Becker, Stefanie C. |
author_sort | Parry, Rhys |
collection | PubMed |
description | The inland floodwater mosquito Aedes vexans (Meigen, 1830) is a competent vector of numerous arthropod-borne viruses such as Rift Valley fever virus (Phenuiviridae) and Zika virus (Flaviviridae). Aedes vexans spp. have widespread Afrotropical distribution and are common European cosmopolitan mosquitoes. We examined the virome of Ae. vexans arabiensis samples from Barkédji village, Senegal, with small RNA sequencing, bioinformatic analysis, and RT-PCR screening. We identified a novel 9494 nt iflavirus (Picornaviridae) designated here as Aedes vexans iflavirus (AvIFV). Annotation of the AvIFV genome reveals a 2782 amino acid polyprotein with iflavirus protein domain architecture and typical iflavirus 5’ internal ribosomal entry site and 3’ poly-A tail. Aedes vexans iflavirus is most closely related to a partial virus sequence from Venturia canescens (a parasitoid wasp) with 56.77% pairwise amino acid identity. Analysis of AvIFV-derived small RNAs suggests that AvIFV is targeted by the exogenous RNA interference pathway but not the PIWI-interacting RNA response, as ~60% of AvIFV reads corresponded to 21 nt Dicer-2 virus-derived small RNAs and the 24–29 nt AvIFV read population did not exhibit a “ping-pong” signature. The RT-PCR screens of archival and current (circa 2011–2020) Ae. vexans arabiensis laboratory samples and wild-caught mosquitoes from Barkédji suggest that AvIFV is ubiquitous in these mosquitoes. Further, we screened wild-caught European Ae. vexans samples from Germany, the United Kingdom, Italy, and Sweden, all of which tested negative for AvIFV RNA. This report provides insight into the diversity of commensal Aedes viruses and the host RNAi response towards iflaviruses. |
format | Online Article Text |
id | pubmed-7232509 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-72325092020-05-22 Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes Parry, Rhys Naccache, Fanny Ndiaye, El Hadji Fall, Gamou Castelli, Ilaria Lühken, Renke Medlock, Jolyon Cull, Benjamin Hesson, Jenny C. Montarsi, Fabrizio Failloux, Anna-Bella Kohl, Alain Schnettler, Esther Diallo, Mawlouth Asgari, Sassan Dietrich, Isabelle Becker, Stefanie C. Viruses Article The inland floodwater mosquito Aedes vexans (Meigen, 1830) is a competent vector of numerous arthropod-borne viruses such as Rift Valley fever virus (Phenuiviridae) and Zika virus (Flaviviridae). Aedes vexans spp. have widespread Afrotropical distribution and are common European cosmopolitan mosquitoes. We examined the virome of Ae. vexans arabiensis samples from Barkédji village, Senegal, with small RNA sequencing, bioinformatic analysis, and RT-PCR screening. We identified a novel 9494 nt iflavirus (Picornaviridae) designated here as Aedes vexans iflavirus (AvIFV). Annotation of the AvIFV genome reveals a 2782 amino acid polyprotein with iflavirus protein domain architecture and typical iflavirus 5’ internal ribosomal entry site and 3’ poly-A tail. Aedes vexans iflavirus is most closely related to a partial virus sequence from Venturia canescens (a parasitoid wasp) with 56.77% pairwise amino acid identity. Analysis of AvIFV-derived small RNAs suggests that AvIFV is targeted by the exogenous RNA interference pathway but not the PIWI-interacting RNA response, as ~60% of AvIFV reads corresponded to 21 nt Dicer-2 virus-derived small RNAs and the 24–29 nt AvIFV read population did not exhibit a “ping-pong” signature. The RT-PCR screens of archival and current (circa 2011–2020) Ae. vexans arabiensis laboratory samples and wild-caught mosquitoes from Barkédji suggest that AvIFV is ubiquitous in these mosquitoes. Further, we screened wild-caught European Ae. vexans samples from Germany, the United Kingdom, Italy, and Sweden, all of which tested negative for AvIFV RNA. This report provides insight into the diversity of commensal Aedes viruses and the host RNAi response towards iflaviruses. MDPI 2020-04-14 /pmc/articles/PMC7232509/ /pubmed/32295109 http://dx.doi.org/10.3390/v12040440 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Parry, Rhys Naccache, Fanny Ndiaye, El Hadji Fall, Gamou Castelli, Ilaria Lühken, Renke Medlock, Jolyon Cull, Benjamin Hesson, Jenny C. Montarsi, Fabrizio Failloux, Anna-Bella Kohl, Alain Schnettler, Esther Diallo, Mawlouth Asgari, Sassan Dietrich, Isabelle Becker, Stefanie C. Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title | Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title_full | Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title_fullStr | Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title_full_unstemmed | Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title_short | Identification and RNAi Profile of a Novel Iflavirus Infecting Senegalese Aedes vexans arabiensis Mosquitoes |
title_sort | identification and rnai profile of a novel iflavirus infecting senegalese aedes vexans arabiensis mosquitoes |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7232509/ https://www.ncbi.nlm.nih.gov/pubmed/32295109 http://dx.doi.org/10.3390/v12040440 |
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