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Review
. 2023:2613:55-72.
doi: 10.1007/978-1-0716-2910-9_5.

Innovative Vaccine Strategy: Self-Adjuvanting Conjugate Vaccines

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Review

Innovative Vaccine Strategy: Self-Adjuvanting Conjugate Vaccines

Yoshiyuki Manabe et al. Methods Mol Biol. 2023.

Abstract

Self-adjuvanting vaccines, covalent conjugates between antigens and adjuvants, are chemically well-defined compared with conventional vaccines formulated through mixing antigens with adjuvants. Innate immune receptor ligands effectively induce acquired immunity through the activation of innate immunity, thereby enhancing host immune responses. Thus, innate immune receptor ligands are often used as adjuvants in self-adjuvanting vaccines. In a self-adjuvanting vaccine, the covalent linkage of antigen and adjuvant enables their simultaneous uptake into immune cells where the adjuvant consequently induces antigen-specific immune responses. Importantly, self-adjuvanting vaccines do not require immobilization to carrier proteins or co-administration of additional adjuvants and thus avoid inducing undesired immune responses. Because of these excellent properties, self-adjuvanting vaccines are expected to be candidates for next-generation vaccines. Here, we take an overview of vaccine adjuvants, mainly focusing on those utilized in self-adjuvanting vaccines and then we review recent reports on self-adjuvanting conjugate vaccines.

Keywords: Acquired immunity; Adjuvant; Conjugate vaccine; Innate immunity; Self-adjuvanting.

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