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The potential as prophylactic vaccines of L1-based particles from cutaneous genus alpha human papillomavirus (HPV) types has not been assessed so far. However, there is a high medical need for such vaccines since HPV-induced skin warts represent a major burden for children and for immunocompromised adults, such as organ transplant recipients. In this study, we have examined the immunogenicity of capsomeres...
Rift Valley fever virus (RVFV) is an emerging mosquito-borne virus causing significant morbidity and mortality in livestock and humans. Rift Valley fever is endemic in Africa, but also outside this continent outbreaks have been reported. Here we report the evaluation of two vaccine candidates based on the viral Gn and Gc envelope glycoproteins, both produced in a Drosophila insect cell expression...
Interleukin-5 (IL-5) is a cytokine which is essential for the maturation of eosinophils in bone marrow and for their release into the blood. Eotaxin is a CC type chemokine implicated in the recruitment of eosinophils in a variety of inflammatory disorders. Since eosinophil-activity is governed by these two pathways, we targeted both IL-5 and eotaxin by active vaccination to block eosinophilia. We...
Both Human Papillomavirus (HPV) type 16/18 bivalent vaccine and type 16/18/6/11 quadrivalent vaccine have been proved to be safe and effective, and licensed for public use. However, these two vaccines do not quite match the distribution of HPV types in China, Southeast Asia and Latin America, where HPV 58 is highly prevalent. Here we produced three types of virus-like particles (VLPs) in baculovirus...
Engagement of CD40 with CD40L induces dendritic cell (DC) maturation and activation, thereby promoting immune responses. The objective of this study was to investigate whether immunization with chimeric CD40L/SHIV virus-like particles (CD40L/SHIV-VLP) could enhance immune responses to SIV Gag and HIV Env proteins by directly activating DCs. We found that CD83, CD40, and CD86 were significantly up-regulated...
Pre-existing immunity against vaccine carrier proteins has been reported to inhibit the immune response against antigens conjugated to the same carrier by a process termed carrier induced epitopic suppression (CIES). Hence understanding the phenomenon of CIES is of major importance for the development of conjugate vaccines. Virus-like particles (VLPs) are a novel class of potent immunological carriers...
Virus-like particles (VLPs) of flaviviruses generated from the prM and E genes are a promising vaccine candidate. We have established cell clones continuously releasing VLPs of West Nile virus (WNV) in serum-free conditions. Two types of VLPs were distinguished by sedimenting analyses in sucrose density gradients. Fast sedimenting VLPs (F-VLPs) were large (40–50nm) and composed of the E and processed...
The use of live recombinant attenuated Salmonella vaccines (RASV) is a promising approach for controlling infections by multiple pathogens. The highly conserved extracellular domain of the influenza M2 protein (M2e) has been shown to provide broad spectrum protection against multiple influenza subtypes sharing similar M2e sequences. An M2e epitope common to a number of avian influenza subtypes was...
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