Specific targeting of IL-1β activity to CD8+ T cells allows for safe use as a vaccine adjuvant

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van den Eeckhout, Bram | van Hoecke, Lien | Burg, Elianne | van Lint, Sandra | Peelman, Frank | Kley, Niko | Uzé, Gilles | Saelens, Xavier | Tavernier, Jan | Gerlo, Sarah

Edité par CCSD ; Nature Research -

International audience. Annual administration and reformulation of influenza vaccines is required for protection against seasonal infections. However, the induction of strong and long-lasting T cells is critical to reach broad and potentially lifelong antiviral immunity. The NLRP3 inflammasome and its product interleukin-1β (IL-1β) are pivotal mediators of cellular immune responses to influenza, yet, overactivation of these systems leads to side effects, which hamper clinical applications. Here, we present a bypass around these toxicities by targeting the activity of IL-1β to CD8 + T cells. Using this approach, we demonstrate safe inclusion of IL-1β as an adjuvant in vaccination strategies, leading to full protection of mice against a high influenza virus challenge dose by raising potent T cell responses. In conclusion, this paper proposes a class of IL-1β-based vaccine adjuvants and also provides further insight in the mechanics of cellular immune responses driven by IL-1β. npj Vaccines (2020) 5:64 ; https://doi.

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