By a News Reporter-Staff News Editor at China Weekly News -- New research on Mosquito-Borne Diseases is the subject of a report. According to news reporting out of Kobe, Japan, by VerticalNews editors, research stated, "The production of a secreted form of Japanese encephalitis (JE) virus-like particles (VLPs) using the baculovirus-insect cell system was investigated. A recombinant baculovirus that contained the JE virus (JEV) prM signal sequence and the genes encoding the precursor (prM) of the viral membrane protein (M) and the envelope glycoprotein (E) was constructed."
Our news journalists obtained a quote from the research from Kobe University, "Western blotting and enzyme-linked immunosorbent assay (ELISA) of the culture supernatant showed that Spodoptera frugiperda Sf9 cells infected with the recombinant baculovirus had secreted the E protein. Sucrose density-gradient sedimentation analysis of the culture supernatant suggested that secreted E antigen molecules were in a particulate form. Baculovirus-infected Sf9 cells produced more than a 10-fold higher yield of E antigen than that produced by previously reported recombinant CHO cells. Following infection with a recombinant baculovirus encoding a form of prM with a pr/M cleavage site mutation designed to suppress cell-fusion activity of E, Sf9 cells showed an E antigen yield comparable to a yield obtained with the baculovirus encoding the authentic form of prM. Baculovirus-infected Trichoplusia ni BTI-TN-5B1-4 (High Five) cells secreted less of the E antigen than Sf9 cells. Moreover, the Drosophila BiP signal sequence gave an E antigen yield comparable to the prM signal sequence, while the honeybee melittin signal sequence and the baculovirus gp64 signal sequence resulted in lower yields of the E antigen."
According to the news editors, the research concluded: "These results provide information important to the development of VLP production processes using the baculovirus-insect cell system."
For more information on this research see: Production of Japanese encephalitis virus-like particles using the baculovirus-insect cell system. Journal of Bioscience and Bioengineering, 2012;114(6):657-62. (Elsevier - www.elsevier.com; Journal of Bioscience and Bioengineering - www.elsevier.com/wps/product/cws_home/505516)
Our news journalists report that additional information may be obtained by contacting H. Yamaji, Dept. of Chemical Science and Engineering, Graduate School of Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan. Additional authors for this research include M. Segawa, M. Nakamura, T. Katsuda, M. Kuwahara and E. Konishi.
Keywords for this news article include: Kobe, Viruses, Virology, Japanese Encephalitis, Mosquito-Borne Diseases.
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