Abstract
Immunotherapy, including immune checkpoint inhibition, has transformed cancer therapy in recent years, providing new and potentially curative options for patients with even advanced disease. However, only a minority of patients achieve long-lasting remissions, and resistance to immune checkpoint inhibition is common. Recently, the sialic acid-Siglec axis has been proposed as a new immune checkpoint that could overcome resistance to current immunotherapy options. In this review, we summarize the current preclinical knowledge about the role of the sialic acid-Siglec interaction in immune suppression in cancer and discuss potential approaches to block this inhibitory pathway to enhance anti-cancer immunity.
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