HIV-Induced Sialoglycans on Infected Cells Promote Immune Evasion from Myeloid Cell-Mediated Killing.

ABSTRACT: Sialic acid-containing glycans (sialoglycans) on pathological cells interact with Siglecs, glycol-immune checkpoint receptors expressed on myeloid cells such as monocytes and neutrophils. This interaction suppresses the cytotoxic functions of these immune cells. We show that HIV infection reprograms the glycosylation machinery of infected cells to increase the expression of specific sialoglycan ligands for Siglecs-3, -7, and -9. These ligands engage Siglecs on myeloid cells, impairing their ability to target HIV-infected cells. Selective disruption of these interactions using 10-1074-Sia, an HIV-specific antibody conjugated to sialidase-an enzyme that removes sialic acids-significantly enhances monocyte- and neutrophil-mediated killing of HIV-infected cells in autologous assays. Treatment

SUBMITTER: Singh S 

PROVIDER: S-EPMC11888171 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature