Influenza is a major public health risk. The current seasonal influenza vaccine is effective against closely matched viruses in healthy adults, but it cannot prevent the outbreaks of epidemics or pandemics because influenza viruses mutate frequently and zoonotic strains can jump the species barrier into humans. Other disadvantages of the seasonal influenza vaccine include the need to produce new vaccines every season, the uncertainty in selecting vaccine strains, and the compromised efficacy for mismatched viruses. A novel generation of influenza vaccines, termed universal influenza vaccines, will overcome these challenges. In the previous grant period, we have produced layered protein nanoparticles (nanoclusters) from conserved HA stalk antigens and the M2 protein ectodomain of influenza A. Nanocluster immunizations induced cross protection against viruses from both phylogenic groups of influenza A, including pandemic-potential avian strains. Both influenza A and influenza B cause influenza epidemics in humans. In this proposal, we propose to construct a multivalent layered nanocluster formulation composed of newly designed antigenic proteins from both influenza A and influenza B as a universal influenza vaccine. The new vaccine will induce broad cross- protection against both influenza types. We have three specific aims:
Aim 1. To design and construct conserved antigens from influenza A and B, fabricate nanoclusters from these and previously designed antigenic proteins, and characterize these new nanoclusters. We will optimize the orchestration, composition, and stability of these nanoclusters for the physiologically-activated release of free antigenic proteins, antigen-processing and presentation after the uptake by dendritic cells, distribution of these nanoclusters to draining lymph nodes, and induction of strong antigen-specific immune responses in mice.
Aim 2. To test whether these layered nanoclusters or an optimal combination will induce broadly reactive immune responses and whether the immunity will grant cross-protection against viruses spanning both influenza A and influenza B in mice.
Aim 3. To test whether the leading multivalent nanocluster combinations will induce robust immune responses which confer broad cross-protection in ferrets. Overall, our research will develop a broadly cross-protective universal influenza vaccine.
?Influenza is the leading cause of death by infection. We will develop a protein nanoparticle universal influenza vaccine composed of newly designed influenza antigens from both influenza A and influenza B to induce broadly reactive immunity. The implementation and success of the project will improve public health by granting broad cross-protection against both influenza epidemics and pandemics.
|Deng, Lei; Mohan, Teena; Chang, Timothy Z et al. (2018) Double-layered protein nanoparticles induce broad protection against divergent influenza A viruses. Nat Commun 9:359|
|Zhu, Wandi; Li, Song; Wang, Chao et al. (2018) Enhanced Immune Responses Conferring Cross-Protection by Skin Vaccination With a Tri-Component Influenza Vaccine Using a Microneedle Patch. Front Immunol 9:1705|
|Luo, Yuan; Mohan, Teena; Zhu, Wandi et al. (2018) Sequential Immunizations with heterosubtypic virus-like particles elicit cross protection against divergent influenza A viruses in mice. Sci Rep 8:4577|
|Wang, Ye; Deng, Lei; Kang, Sang-Moo et al. (2018) Universal influenza vaccines: from viruses to nanoparticles. Expert Rev Vaccines 17:967-976|
|Deng, Lei; Chang, Timothy Z; Wang, Ye et al. (2018) Heterosubtypic influenza protection elicited by double-layered polypeptide nanoparticles in mice. Proc Natl Acad Sci U S A 115:E7758-E7767|
|Mohan, Teena; Zhu, Wandi; Wang, Ye et al. (2018) Applications of chemokines as adjuvants for vaccine immunotherapy. Immunobiology 223:477-485|
|Deng, Lei; Wang, Bao-Zhong (2018) A Perspective on Nanoparticle Universal Influenza Vaccines. ACS Infect Dis :|
|Wang, Chao; Zhu, Wandi; Luo, Yuan et al. (2018) Gold nanoparticles conjugating recombinant influenza hemagglutinin trimers and flagellin enhanced mucosal cellular immunity. Nanomedicine 14:1349-1360|
|Zhu, Wandi; Pewin, Winston; Wang, Chao et al. (2017) A boosting skin vaccination with dissolving microneedle patch encapsulating M2e vaccine broadens the protective efficacy of conventional influenza vaccines. J Control Release 261:1-9|
|Chang, Timothy Z; Stadmiller, Samantha S; Staskevicius, Erika et al. (2017) Effects of ovalbumin protein nanoparticle vaccine size and coating on dendritic cell processing. Biomater Sci 5:223-233|
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