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Objective
To evaluate the relation between PD‐L1 expression in oral cavity squamous cell carcinomas and clinicopathological features as well as survival outcomes.
Methods
A retrospective immunohistochemical study was carried out on 55 archived tumours from 55 patients. Tumours were stained for PD‐L1 and scored by the proportion of tumour cells with positive membranous staining. PD‐L1 scores were...
Programmed cell death‐ligand 1 (PD‐L1) is a transmembrane protein that acts as a co‐inhibitory factor in the immune response. Its receptor, programmed cell death protein 1 (PD‐1), is found on immune cells, where binding to PD‐L1 can reduce the proliferation of PD‐1‐positive cells, inhibit their cytokine secretion and induce apoptosis. PD‐L1 in immune‐privileged tissue plays a crucial role in peripheral...
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