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Gold nanoparticles enhance immune responses in mice against recombinant classical swine fever virus E2 protein

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Abstract

Objective

To create a novel subunit vaccine that used AuNPs as carriers to enhance immune responses in mice against recombinant classical swine fever virus E2 protein (CSFV E2).

Results

Gold nanoparticles (AuNPs) were successfully coupled to the E2 protein and formed stable particle complexes called E2 conjugated AuNPs (E2–AuNPs). In vitro studies have shown that the E2–AuNPs complex has the same immunogenicity as the E2 protein, and AuNPs can promote the phagocytosis of the E2 protein by antigen-presenting cells (APCs). In vivo results of BALB/c mice showed that the antibody levels, lymphocyte proliferation index, IFN-γ and IL-10 cytokines induced by E2–AuNPs were relatively higher than those of E2 or AuNPs group.

Conclusions

This finding demonstrated the potential of using AuNPs as a carrier to enhance the body's immune response for developing CSFV subunit vaccines. This model also contributes to the development of other flavivirus subunit vaccines, such as hepatitis C virus (HCV) and bovine viral diarrhea virus (BVDV).

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Acknowledgements

The author is grateful to Ruiqin Li and Xiaokang Lu (Henan University of Chinese Medicine) for technical assistance with TEM analysis. This work was funded by grants from the Science-Technology Foundation for Outstanding Young Scientists of Henan Academy of Agricultural Sciences (Grant no. 2018YQ29), the National Key Research and Development Program of China (2017YFD0501103, 2016YFD0500701, 2016YFD0500709), China Agriculture Research System (CARS-36).

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Authors and Affiliations

Authors

Contributions

Gaiping Zhang, Qianyue Jin, Yafei Li and Peiyang Ding contributed to the study conception and design. Wen Zhou, Yongxiao Chai, Xufeng Li and Yao Wang helped with the animal experiments. Yafei Li wrote the manuscript and analysed the data. Qianyue Jin, Peiyang Ding checked and revised it. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Gaiping Zhang.

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Conflict of interest

The authors declare that they have no competing interests.

Ethical approval

The animal experiments were carried out according to the Animal Experiment Committee of Henan Academy of Agricultural Sciences (Approval number SYXK 2014–0007). All animals received humane care in compliance with good animal practice according to the animal ethics procedures and guidelines of China.

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Li, Y., Jin, Q., Ding, P. et al. Gold nanoparticles enhance immune responses in mice against recombinant classical swine fever virus E2 protein. Biotechnol Lett 42, 1169–1180 (2020). https://doi.org/10.1007/s10529-020-02853-w

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  • DOI: https://doi.org/10.1007/s10529-020-02853-w

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