Viruses of the class Bunyaviricetes are often transmitted by arthropods, including mosquitoes. The innate immune response in mosquitoes comprises several pathways, including sequence-specific degradation through RNA interference (RNAi). It is known that bunyavirus infections are targeted by the innate immune response in mosquitoes and derived cells; however, detailed information is often still missing. In this chapter, we describe a detailed protocol to determine if a protein of interest acts antiviral against bunyavirus infection in mosquito-derived cells. In line, we also describe a detailed protocol to investigate the effect of overexpression of a mosquito-encoded protein or analysis of mutant proteins on bunyavirus infection.
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http://dx.doi.org/10.1007/978-1-0716-4338-9_7 | DOI Listing |
Methods Mol Biol
December 2024
Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany.
J Gen Virol
November 2024
International Collaboration Unit, International Institute for Zoonosis Control, Hokkaido University, Sapporo, Japan.
West Nile virus (WNV) is a mosquito-borne flavivirus that causes encephalitis in humans and infects crocodiles, resulting in rashes and neurological signs. In Zambia, two distinct lineages of WNV have been detected in neighbouring areas: lineage 2 in mosquitoes and lineage 1a in farmed crocodiles. Considering the risk of direct or vector-mediated WNV transmission from crocodiles to mammals, it is necessary to elucidate the pathogenicity of WNV strains derived from crocodiles.
View Article and Find Full Text PDFEMBO Mol Med
September 2024
Integrative Parasitology, Center for Infectious Diseases, Heidelberg University Medical School, 69120, Heidelberg, Germany.
Malaria vaccination approaches using live Plasmodium parasites are currently explored, with either attenuated mosquito-derived sporozoites or attenuated blood-stage parasites. Both approaches would profit from the availability of attenuated and avirulent parasites with a reduced blood-stage multiplication rate. Here we screened gene-deletion mutants of the rodent parasite P.
View Article and Find Full Text PDFMicrobiol Immunol
September 2024
Department of Virology I, National Institute of Infectious Diseases, Tokyo, Japan.
Spotted fever group (SFG) rickettsia, the causative agent of SFG rickettsiosis, is predominantly carried by ticks, whereas Orientia tsutusgamushi, the causative agent of scrub typhus, is primarily transmitted by chigger mites in Japan. In this study, we attempted to isolate intracellular eubacteria from Leptotrombidium scutellare, a major vector of O. tsutsugamushi; moreover, we isolated an SFG rickettsia using a mosquito-derived cell line.
View Article and Find Full Text PDFAntimicrob Agents Chemother
July 2024
School of Public Health, Nanjing Medical University, Nanjing, Jiangsu, China.
The emergence of clinically drug-resistant malaria parasites requires the urgent development of new drugs. Mosquitoes are vectors of multiple pathogens and have developed resistance mechanisms against them, which often involve antimicrobial peptides (AMPs). An-cecB is an AMP of the malaria-transmitting mosquito genus , and we herein report its antimalarial activity against 3D7, the artemisinin-resistant strain 803, and the chloroquine-resistant strain Dd2 .
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