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Chemokine receptors are promising targets for enhancing T-cell immunity and anti-cancer therapy. CCL5 is a potential adjuvant for DNA vaccination. We postulated that CCR5 superagonists could be even more effective. A CCR5 superagonist derived from natural CCL5 by directed in vitro evolution, namely 1P7, is used as a DNA vaccine adjuvant and expressed as fused chemokine-Ig (1P7-Ig). We show that OVA+1P7-Ig...
The aim of current study was to evaluate the prospects of adjuvants against DNA vaccination (pES/2SS) encoding somatostatin (SS) and hepatitis B surface antigen fusion gene. A total of 60 female Hu lambs were divided into 6 groups and vaccinated in the context of various adjuvants (and controls): pE-CpG, Escherichia coli DH5α DNA, crude liposomes or GM-CSF in combination with the pES/2SS plasmid....
As an adaptor molecule in the retinoic acid-inducible gene-I (RIG-I) signaling pathway, the virus-induced signaling adaptor (VISA) molecule activates NF-κB and IRF3 and thereby leads to the production of type I interferons (IFNs). To explore the potential of VISA as a genetic adjuvant for DNA vaccines, a eukaryotic expression plasmid, pVISA, was generated by cloning the VISA gene into the pVAX1vector...
Previous immunological studies from our laboratory have demonstrated the potential role of Toxoplasma gondii antigens SAG1 and GRA2 as vaccine candidates. To further evaluate the vaccine's effects, a series of recombinant DNA vaccines pVAX1–SAG1, pVAX1–GRA2 and pVAX1–SAG1–GRA2, termed pSAG1, pGRA2 and pSAG1–GRA2, respectively, were constructed. A plasmid pVAX1–S/PreS2, termed pSPreS2 encoding hepatitis...
Toxoplasma gondii (T. gondii) is an obligate, intracellular, protozoan parasite that infects large variety of warm-blooded animals including humans, livestock, and marine mammals, and causes the disease toxoplasmosis. Although T. gondii infection rates differ significantly from country to country, it still has a high morbidity and mortality. In these circumstances, developing an effective vaccine...
DNA vaccination is an attractive approach to elicit tumor-specific cytotoxic CD8+ T lymphocytes (CTL), which can mediate protective immunity against tumors. To initiate CTL responses, antigen-encoding plasmids employed for DNA vaccination need to activate dendritic cells (DC) through the stimulation of DNA-sensing innate immune receptors that converge in the activation of the master transcription...
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