[Comparative analysis of the immune response to DNA constructions encoding hepatitis C virus nonstructural proteins]статья

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[1] [comparative analysis of the immune response to dna constructions encoding hepatitis c virus nonstructural proteins] / O. V. Masalova, E. I. Lesnova, A. V. Ivanov et al. // Voprosy Virusologii. — 2013. — Vol. 58, no. 2. — P. 21–28. A promising approach to construction of antiviral vaccines consists in activation of cellular immunity with the DNA vaccines. The goal of this work was to evaluate the efficacy of genetic immunization of mice with DNA pcNS3-NS5B encoding five hepatitis C virus (HCV) nonstructural proteins: NS3, NS4A, NS4B, NS5A, and NS5B in comparison with plasmids containing genes of same individual nonstructural proteins. The DNA constructions were injected intramuscularly in DBA mice three times. The humoral immune response was assessed with ELISA; cellular immune response–in blast transformation reaction, by quantitation of CD4+ and CD8+ T cell proliferation using flow cytofluorometry, by intracellular synthesis and secretion of IFN-gamma and IL-2 in ELISpot and ELISA. It was found that the functionally active T cell response was achieved to antigens presenting NS3, NS4, NS5A, and NS5B epitopes of different HCV genotypes in response to pcNS3-NS5B plasmid and was stronger than that to plasmids carrying individual genes. A high proliferation rate of CD4+ T cells, secretion of IL-2 and IFN-gamma, induction of anti-NS3 and anti-NS5B IgG2a were demonstrated. These findings indicate that DNA construction pcNS3-NS5B is one of promising candidates for anti-HCV vaccine developing.

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