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Covalently Conjugated NOD2/TLR7 Agonists Are Potent and Versatile Immune Potentiators

The success of vaccination with subunit vaccines often relies on the careful choice of adjuvants. There is great interest in developing new adjuvants that can elicit a cellular immune response.… Click to show full abstract

The success of vaccination with subunit vaccines often relies on the careful choice of adjuvants. There is great interest in developing new adjuvants that can elicit a cellular immune response. Here, we address this challenge by taking advantage of the synergistic cross-talk between two pattern recognition receptors: nucleotide-binding oligomerization-domain-containing protein 2 (NOD2) and Toll-like receptor 7 (TLR7). We designed two conjugated NOD2/TLR7 agonists, which showed potent immunostimulatory activities in human primary peripheral blood mononuclear cells and murine bone-marrow-derived dendritic cells. One of these, 4, also generated a strong antigen-specific immune response in vivo, with a Th1-polarized profile. Importantly, our study shows that novel NOD2/TLR7 agonists elicit sophisticated and fine-tuned immune responses that are inaccessible to individual NOD2 and TLR7 agonists.

Keywords: conjugated nod2; nod2 tlr7; tlr7 agonists; agonists potent; covalently conjugated

Journal Title: Journal of Medicinal Chemistry
Year Published: 2022

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