Augmentation of vaccine-induced humoral and cellular immunity by a physical radiofrequency adjuvant

Yan Cao, Xiaoyue Zhu, Md Nazir Hossen, Prateek Kakar, Yiwen Zhao and Xinyuan Chen ()
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Yan Cao: University of Rhode Island
Xiaoyue Zhu: University of Rhode Island
Md Nazir Hossen: University of Rhode Island
Prateek Kakar: University of Rhode Island
Yiwen Zhao: University of Rhode Island
Xinyuan Chen: University of Rhode Island

Nature Communications, 2018, vol. 9, issue 1, 1-13

Abstract: Abstract Protein/subunit vaccines often require external adjuvants to induce protective immunity. Due to the safety concern of chemical adjuvants, physical adjuvants were recently explored to boost vaccination. Physical adjuvants use physical energies rather than chemicals to stimulate tissue stress and endogenous danger signal release to boost vaccination. Here we present the safety and potency of non-invasive radiofrequency treatment to boost intradermal vaccination in murine models. We show non-invasive radiofrequency can increase protein antigen-induced humoral and cellular immune responses with adjuvant effects comparable to widely used chemical adjuvants. Radiofrequency adjuvant can also safely boost pandemic 2009 H1N1 influenza vaccination with adjuvant effects comparable to MF59-like AddaVax adjuvant. We find radiofrequency adjuvant induces heat shock protein 70 (HSP70) release and activates MyD88 to mediate the adjuvant effects. Physical radiofrequency can potentially be a safe and potent adjuvant to augment protein/subunit vaccine-induced humoral and cellular immune responses.

Date: 2018
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DOI: 10.1038/s41467-018-06151-y

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