Cited by 775Immunotherapy and Immune ResponsesImmune responses and vaccinationsRNA Interference and Gene Delivery

Lipid nanoparticles enhance the efficacy of mRNA and protein subunit vaccines by inducing robust T follicular helper cell and humoral responses

Open access
Alameh, Mohamad-Gabriel, Tombácz, István, Bettini, Emily, Lederer, Katlyn, Ndeupen, Sonia, Sittplangkoon, Chutamath, Wilmore, Joel R., Gaudette, Brian T. +26 more·2021·Immunity

Abstract

Adjuvants are critical for improving the quality and magnitude of adaptive immune responses to vaccination. Lipid nanoparticle (LNP)-encapsulated nucleoside-modified mRNA vaccines have shown great efficacy against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), but the mechanism of action of this vaccine platform is not well-characterized. Using influenza virus and SARS-CoV-2 mRNA and protein subunit vaccines, we demonstrated that our LNP formulation has intrinsic adjuvant activity that promotes induction of strong T follicular helper cell, germinal center B cell, long-lived plasma cell, and memory B cell responses that are associated with durable and protective antibodies in mice. Comparative experiments demonstrated that this LNP formulation outperformed a widely used MF59-like adjuvant, AddaVax. The adjuvant activity of the LNP relies on the ionizable lipid component and on IL-6 cytokine induction but not on MyD88- or MAVS-dependent sensing of LNPs. Our study identified LNPs as a versatile adjuvant that enhances the efficacy of traditional and next-generation vaccine platforms.

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Crossref · 10.1016/j.immuni.2021.11.001

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  • Modifications to the spike protein are intended to reduce the innate immune response by inhibiting proinflammatory cytokines, while the lipid nanoparticle vehicle/EV for the mRNA acts as an adjuvant to enhance the immune response.

    “Modifications to the spike protein are intended to reduce the innate immune response by inhibiting proinflammatory cytokines, while at the same time, the lipid nanoparticle vehicle/EV for the mRNA acts as an adjuvant to enhance the immune response. 194-196”

    From COVID-19, Myocarditis and Pericarditis (2023) · cites this paper as [195]

    The Discussion (page unavailable) says the mRNA is nucleoside-modified to reduce inflammation caused by innate sensing; it does not attribute that effect to modifications of the spike protein or specify inhibition of proinflammatory cytokines. The Results section (page unavailable) demonstrates that the LNP formulation has adjuvant activity and enhances vaccine responses in mice, supporting the second part of the claim. (LLM, conf=0.90)

    Experimental — accuracy not yet measured
  • Adjuvant activity of the LNP critically relies on IL-6 and its constituent ionizable lipid.

    “Adjuvant activity of the LNP critically relies on IL-6 and its constituent ionizable lipid.”
  • LNP exerts potent stimulatory activity against T follicular helper cells and immune induction superior to AddaVax formulated vaccine.

    “When used in mRNA and protein subunit vaccines, LNP exerts potent stimulatory activity against T follicular helper cell and the immune induction was superior to what induced by AddaVax formulated vaccine.”
  • Potent immune responses from a single immunization of LNP loaded non-inflammatory nucleoside-modified mRNA was related to LNP adjuvanticity.

    “Remarkably, potent immune responses from a single immunization of LNP loaded non-inflammatory nucleoside-modified mRNA was related to LNP adjuvanticity (38).”
  • In combination with LNPs, modified mRNA is now the basis for the separate mRNA vaccine platform that has been proven most successful based on an optimal immune response originating from the compromise between LNP adjuvant function and modified mRNA, allowing improved efficacy and safety.

    “In combination with LNPs, modified mRNA is now the basis for the separate mRNA vaccine platform41,44 that has been proven as the most successful based on its optimal immune response originating from the compromise between LNP adjuvant function33 and modified mRNA, allowing improved efficacy and safety.”

    From COVID-19 mRNA vaccines: Platforms and current developments (2022) · cites this paper as [33]

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  1. Walsh E.E. Frenck R.W. Jr. Falsey A.R. Kitchin N. Absalon J. Gurtman A. Lockhart S. Neuzil K. Mulligan M.J. Bailey R. Safety and Immunogenicity of Two RNA-Based Covid-19 Vaccine Candidates N. Engl. J. Med. 383 2020 2439 2450 33053279 PMC7583697

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Authors
Alameh, M.-G., Tombácz, I., Bettini, E., Lederer, K., Ndeupen, S., Sittplangkoon, C., Wilmore, J. R., Gaudette, B. T., Soliman, O. Y., Pine, M., Hicks, P., Manzoni, T. B., Knox, J. J., Johnson, J. L., Laczkó, D., Muramatsu, H., Davis, B., Meng, W., Rosenfeld, A. M., Strohmeier, S., Lin, P. J. C., Mui, B. L., Tam, Y. K., Karikó, K., Jacquet, A., Krammer, F., Bates, P., Cancro, M. P., Weissman, D., Luning Prak, E. T., Allman, D., Igyártó, B. Z., Locci, M., & Pardi, N.
Affiliations
  • University of Pennsylvania (US)
  • Thomas Jefferson University (US)
  • Chulalongkorn University (TH)
  • Icahn School of Medicine at Mount Sinai (US)
  • Acuitas Therapeutics (Canada) (CA)
  • BioNTech (Germany) (DE)
Corresponding author
  • Locci, Michela
  • Pardi, Norbert
Venue
Immunity
Publisher
Elsevier BV
Published
2021-12
Volume
54
Issue
12
Pages
2877-2892.e7
ISSN
1074-7613 (ISSN-L)
OpenAlex
W3209735640
Cited by
775
References
89
Citations by year
2026: 155 · 2025: 221 · 2024: 181 · 2023: 132 · 2022: 82 · 2021: 4
FWCI
37.14
Type
journal article
Language
en
Update notices
erratum (2022-06-14)
Open access
Locations
  • Immunity (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • University of Pennsylvania
  • National Institute of Allergy and Infectious Diseases (R01-AI124429, R01AI123738, 1U19AI135902, R01AI153064, U19-AI142596, UM1-AI-144371, HHS-NIH-NIAID-BAA2018, R01AI146101)
  • Icahn School of Medicine at Mount Sinai
  • Children's Hospital of Philadelphia
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › Immune responses and vaccinations
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › RNA Interference and Gene Delivery
Keywords
lipid nanoparticles, vaccine adjuvants, mRNA vaccines, subunit vaccine, T follicular helper cells, germinal center B cells, long-lived plasma cells, memory B cells, humoral immune response, SARS-CoV-2, influenza virus, ionizable lipids, interleukin-6, MF59, AddaVax, MyD88, MAVS
MeSH terms
COVID-19, SARS-CoV-2, COVID-19 Vaccines, mRNA Vaccines, Adjuvants, Immunologic, Animals, B-Lymphocytes, T-Lymphocytes, Helper-Inducer, Humans, Liposomes, Mice, Inbred BALB C, Interleukin-6, Germinal Center, Protein Subunits, Adaptor Proteins, Signal Transducing, Mice, Nanoparticles, Immunity, Humoral, HEK293 Cells

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