Scientists generate a new plasmid-based reverse genetics system for rotaviruses

Generation of recombinant rotavirus from cloned cDNA. Credit: Osaka University

Rotaviruses are the most common cause of severe diarrhea and kill hundreds of thousands of infants a year. Although current vaccines are effective in preventing aggravation of rotaviruses, the development of more effective vaccines at lower cost is expected. Technology cannot study well how rotaviruses invade and replicate in a cell. To identify which genes are crucial for the infection of rotaviruses, scientists at the Research Institute for Microbial Diseases at Osaka University report a new plasmid-based reverse genetics system. The study can be read in Proceedings of the National Academy of Sciences of the United States of America.

“Reverse genetics allows us to generate artificially engineered viruses”, says Associate Professor Takeshi Kobayashi, who led the study. “Using reverse genetics, we can mutate a gene and see its effects on the virus,” he added.

Reverse genetics systems have been developed for a wide number of viruses to study the conditions in which a virus thrives, but systems for multiple-segmented RNA-based viruses like rotaviruses have proven more difficult. Kobayashi’s group solved this problem by including two , FAST and VV capping…

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