03Jul 2024
Stabilization of EREG via STT3B-mediated N-glycosylation is critical in head and neck squamous cell carcinoma

Stabilization of EREG via STT3B-mediated N-glycosylation is critical in head and neck squamous cell carcinoma

Dysregulated Epiregulin (EREG) promotes PDL1 upregulation in head and neck squamous cell carcinoma (HNSCC) via the c-myc pathway. N-glycosylation of EREG at N47, mediated by STT3B glycosyltransferases, is crucial for its stability and function. Mutation at N47 or STT3B knockdown destabilizes EREG, reducing PDL1 levels. Inhibiting STT3B with NGI-1 degrades EREG and suppresses PDL1. Combining NGI-1 with anti-PDL1 therapy enhances immunotherapy efficacy in HNSCC, highlighting STT3B-mediated glycosylation as a target for improving cancer treatment.

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