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Chikungunya virus (CHIKV) is an arthropod-borne virus that is transmitted to humans primarily via the bite of an infected mosquito. Infection of humans by CHIKV can cause chikungunya fever which is an acute febrile illness associated with severe, often debilitating polyarthralgias. Since a re-emergence of CHIKV in 2004, the virus has spread into novel locations in nearly 40 countries including non-endemic...
Lassa virus (LASV) causes a severe hemorrhagic fever endemic throughout western Africa. Because of the ability to cause lethal disease in humans, limited treatment options, and potential as a bioweapon, the need for vaccines to prevent LASV epidemic is urgent. However, LASV vaccine development has been hindered by the lack of appropriate small animal models for efficacy evaluation independent of biosafety...
Enterovirus A71 infection has become a severe threat for global public health. Vaccines for controlling and preventing Enterovirus A71 epidemics are highly demanded, however, vaccine evaluation has been hindered by the lack of suitable Enterovirus A71 infection animal models. Here we established an hSCARB2 knockin mouse model for real-time monitoring of enterovirus A71 infection in vivo. This model...
The limitations of highly active anti-retroviral therapy (HAART) have necessitated the development of alternative therapeutics. In this study, we generated ovalbumin (OVA)-pulsed and pcDNAgp120-transfected dendritic cell (DC)-released exosomes (EXOova and EXOgp120) and ConA-stimulated C57BL/6 CD8 + T cells. OVA- and Gp120-Texo vaccines were generated from CD8 + T cells with uptake...
Praziquantel (PZQ), which is used to treat all forms of schistosomiasis, has been shown to induce strong T cell activities and decrease T regulatory cell levels. In our study, we investigated whether PZQ may be used as an adjuvant for a hepatitis B surface antigen (HBsAg) DNA vaccine (pcD-S2) in eliciting strong humoral and cellular responses. Our data demonstrate that PZQ as an adjuvant increased...
We studied the immunogenicity of a DNA SARS-vaccine, a whole killed virus, or a whole killed and DNA vaccine combination. The DNA vaccine contained a plasmid encoding the SARS coronavirus (SARS-CoV) S protein under the control of the human CMV promoter and intron A. The whole killed virus vaccine was comprised of SARS-CoV, propagated in Vero-E6 cells, with subsequent β-propilactone inactivation and...
Former investigations demonstrated that the envelope glycoprotein E2 could protect pigs from classical swine fever virus (CSFV). Based on these findings, we prepared synthetic peptide vaccine using E2 N-terminal antigenic units B/C and hoped to induce protective activity against lethal challenge of virulent CSFV strain Shimen. Five overlapped peptides sequence-covering amino acids 693-777 on E2 of...
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