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BU researchers uncover viral small RNAs in mosquito cells

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BU researchers uncover viral small RNAs in mosquito cells

(Boston)–Researchers from Boston University School of Medicine (BUSM) provide a new genomics resource that details the small RNA transcriptomes (gene expression) of four bio-medically important mosquito species.

This is the first study to provide a platform for biologists to compare the characteristics of these small RNAs between these four mosquitoes as well as the most widely used insects for genetic experiments, the fruit fly, Drosophila. Although previous studies looked at each of the individual mosquito species separately, this study is the first to allow comparisons between all four species.

"Although mosquitoes are related to Drosophila, they have very different genomes. In addition, mosquitos bite humans for blood meals that allow them to reproduce and but unfortunately allows serious human pathogens like viruses to infect us and cause diseases like yellow fever virus, dengue fever virus, zika virus and eastern equine encephalitis virus," explained corresponding author Nelson Lau, PhD, associate professor of biochemistry at Boston University School of Medicine (BUSM).

The researchers obtained cell cultures and dissected samples of the mosquito species Anopheles gambiae, Culex quinquefasciatus, Aedes aegypti and Aedes albopictus. They extracted and purified the small RNA molecules, created libraries for high-throughput sequencing, and then developed a special bioinformatics platform to provide thorough genomic analysis of these small RNAs. They provide all this analysis in a database website for the public to access at https://laulab.bu.edu/msrg/ .

The four mosquito species have global impacts on human health. Anopheles is the major vector for the parasite causing malaria, but is not known to transmit many viruses. In contrast, Culex and Aedes mosquitoes are well known to pass viruses between humans during mosquito bites, but it […]

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