Small Heat Shock Proteins B1 and B6: Which One is the Most Effective Adjuvant in Therapeutic HPV Vaccine?

IUBMB Life
Azam BolhassaniSeyed Alireza Nadji

Abstract

Therapeutic human papillomaviruse (HPV) vaccines have the potential to inhibit the tumor growth by targeting HPV E6 and E7 oncoproteins. Among different vaccine strategies, DNA and protein-based approaches are the most effective candidates for stimulation of the immune responses against HPV infections. Our study was designed to assess the efficacy of small heat shock proteins B1 (Hsp27) and B6 (Hsp20) as an adjuvant accompanied by HPV16 E7 and hPP10-E7 antigens in tumor mouse model. A major key for successful DNA and protein transfer into cells is the development of delivery systems with high efficiency and low cytotoxicity. Herein, we used hPP10 and MPG cell penetrating peptides (CPPs) for protein and DNA delivery in vivo, respectively. Our data indicated that the combination of Hsp27 with the recombinant hPP10-E7 protein in homologous protein/protein (hPP10-E7 + Hsp27) and heterologous DNA/protein (pcDNA-E7 + MPG/ hPP10-E7 + Hsp27) significantly enhanced the E7-specific T cell responses. Indeed, these regimens induced high levels of IgG2a, IFN-γ and IL-2 directed toward Th1 responses and also Granzyme B secretion as compared to other immunization strategies, and also displayed complete protection more than 60 days after treat...Continue Reading

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Citations

Sep 25, 2019·Current Drug Delivery·Sepehr SoleymaniAzam Bolhassani
Aug 23, 2019·Clinica Chimica Acta; International Journal of Clinical Chemistry·Azam Bolhassani, Elnaz Agi

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