@article{mbs:/content/journal/jgv/10.1099/0022-1317-74-1-89, author = "Qu, Xinyong and Chen, Wenbin and Maguire, Terry and Austin, Francis", title = "Immunoreactivity and protective effects in mice of a recombinant dengue 2 Tonga virus NS1 protein produced in a baculovirus expression system", journal= "Journal of General Virology", year = "1993", volume = "74", number = "1", pages = "89-97", doi = "https://doi.org/10.1099/0022-1317-74-1-89", url = "https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-74-1-89", publisher = "Microbiology Society", issn = "1465-2099", type = "Journal Article", abstract = "The double-stranded replicative form of dengue 2 virus (DEN-2) RNA (Tonga strain) was used as a substrate to produce DNA clones of the NS1–NS2A genes via reverse transcriptase synthesis of full length cDNA followed by polymerase chain reaction amplification of the NS1–NS2A region. Products were cloned into pTZ18R for sequencing and into baculovirus for expression studies. The deduced amino acid sequence of the NS1–NS2A was almost identical to that of the S1 attenuated strain of DEN-2 Puerto Rico 159, differing in only four amino acids. The NS1 protein expressed in insect cells [Spodoptera frugiperda (Sf-9)] from the baculovirus recombinant was indistinguishable from authentic NS1 of DEN-infected Aedes albopictus cells in glycosylation, dimerization, cellular presentation and antigenicity. Mice injected with the expressed protein developed NS1-specific complement-fixing antibodies and were partially protected against neurological residua after intracranial challenge. The protective effect was mouse strain- and gender-specific.", }