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An mRNA-based rabies vaccine induces strong protective immune responses in mice and dogs | Virology Journal

Rabies is a lethal zoonotic disease that is mainly caused by the rabies virus (RABV). Although effective vaccines have long existed, current vaccines take both time and cost to produce. Messenger RNA (mRNA) technology is an emergent vaccine platform that supports rapid vaccine development on a large scale. Here, an optimized mRNA vaccine construct (LVRNA001) expressing rabies virus glycoprotein (RABV-G) was developed in vitro and then evaluated in vivo for its immunogenicity and protective capacity in mice and dogs. LVRNA001 induced neutralizing antibody production and a strong Th1 cellular immune response in mice. In both mice and dogs, LVRNA001 provided protection against challenge with 50-fold lethal dose 50 (LD50) of RABV. With regards to protective efficiency, an extended dosing interval (14 days) induced greater antibody production than 3- or 7-day intervals in mice. Finally, post-exposure immunization against RABV was performed to evaluate the survival rates of dogs rec ....

United States , San Diego , Baden Wüberg , Neo Bioscience , Institute Of Military Veterinary Medicine , Tree Star Inc , Guangdong Academy Of Agricultural Sciences , Institute Of Animal Health , Synbiotics Corp , Dnasei Novoprotein Scientific Inc , Sepax Technologies Inc , Research Ethics Committee Of The College , Academy Of Military Medical Sciences Changchun , G Jiangsu Synthgene Biotechnology Co , Repligen Corporation , World Organization For Animal Health , Guangdong Academy Of Agricultural Sciences Guangzhou , Boehringer Ingelheim Vetmedica Inc , Novoprotein Scientific Inc , Chinese National Institutes For Food , Academy Of Military Medical Sciences , Hytest Ltd , Animal Health , Guangdong Academy , Agricultural Sciences , Military Veterinary Medicine ,

Echinococcus granulosus sensu stricto and antigen B may decrease inflammatory bowel disease through regulation of M1/2 polarization | Parasites & Vectors

Inflammatory bowel disease (IBD) is a chronic idiopathic disease characterized by inflammation-related epithelial barrier damage in the intestinal tract. Helminth infection reduces autoimmune disease symptoms through regulation of inflammatory responses based on hygiene theory. However, the underlying mechanisms remain unclear. BALB/c mice were infected with microcysts of E. granulosus sensu stricto and drank water containing 3.5% dextran sodium sulfate (DSS) at the 100th day post-infection. After 7 days of drinking DSS, the mouse body weight change and disease activity index (DAI) were recorded every day, and colon length and histological score were evaluated after sacrifice. After injection with antigen B (AgB), inducible nitric oxide synthase (iNOS) and Fizz1 expression and F4/80+CD11c+ M1 and F4/80+CD206+ M2 in the peritoneal cells and colon tissues were analysed by qPCR and flow cytometry, respectively. Gut microbiota were profiled by 16S rRNA sequencing of the mouse faec ....

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