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Boosting Tat DNA vaccine with Tat protein stimulates strong cellular and humoral immune responses in mice

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Abstract

The aim of the present study was to evaluate the efficacy of a novel DNA priming-protein boosting regimen in simultaneous enhancing humoral and cellular immunogenicity of the HIV-1-Tat-based candidate vaccines in mice. The experimental BALB/c mice were successfully immunized with the HIV-1-Tat DNA vaccine and boosted with the corresponding protein vaccine over a two-week interval and the elicitation of cellular and humoral immune responses were simultaneously assessed. The results showed that the prime-boost immunization has significantly given rise to lymphocyte proliferation and CTL responses, as well as the levels of both IgG and IgG antibodies compared to the other candidate vaccines. The results of the Th polarization also revealed that the Th1: Th2 indexes in the mice vaccinated with the HIV-1 Tat protein, Tat DNA, and the prime-boost vaccines were 1.03, 1.19, and 1.25, respectively. The results suggest that co-administration of the HIV-1-Tat DNA with the corresponding protein may serve as a potential formulation for enhancing of Tat vaccineinduced immunity and has measurable effects on shaping vaccines’ induced Th polarization.

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Acknowledgements

The authors deeply thank the research council of the Institute for Advanced Studies in Basic Sciences (IASBS) for its support during the course of this project.

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  1. Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), P. O. Box 45195-1159, Zanjan, Iran

    Samira Alipour & Atiyeh Mahdavi

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  1. Samira Alipour
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  2. Atiyeh Mahdavi
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Correspondence to Atiyeh Mahdavi.

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Alipour, S., Mahdavi, A. Boosting Tat DNA vaccine with Tat protein stimulates strong cellular and humoral immune responses in mice. Biotechnol Lett 42, 505–517 (2020). https://doi.org/10.1007/s10529-020-02801-8

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