ArticleCell chemical biology2025
RENBP inhibition amplifies metabolic glycan labeling efficiency of antigen-presenting cells in vitro and in vivo.
Article in Cell chemical biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Metabolic glycoengineering of unnatural sugars provides a powerful tool to introduce unique chemical tags onto cell membrane for subsequent conjugation of cargos. However, the metabolic glycan labeling efficiency of antigen-presenting cells (APCs), the key mediators of adaptive immunity, is often low. Here, we report that APCs upregulate GlcNAc 2-epimerase (RENBP) and that RENBP inhibition leads to improved labeling efficiency of tetraacetyl-N-azidoacetylmannosamine (AAM) in APCs, including dendritic cells (1.2-fold), macrophages (1.3-fold), and B cells (1.4-fold) in vitro. RENBP inhibition can preferentially enhance AAM labeling efficiency in APCs than in non-APCs and selectively enhance the labeling efficiency of AAM over azido-galactosamine. We further demonstrate that RENBP inhibitors can improve AAM-mediated labeling of B cells and other APCs in vivo, with the largest enhancement for B cells (>3-fold) for 7 days. Our study uncovers a facile approach to improving metabolic glycan labeling of APCs, enabling the development of APC-targeted immunotherapies.
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