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CD155 (PVR; poliovirus receptor; nectin-like
protein 5/NECL-5) is an immunoglobulin-superfamily cell-adhesion molecule and
immune-checkpoint ligand. It binds the inhibitory receptors TIGIT
and CD96, as well as the activating receptor
CD226/DNAM-1, on T cells and NK cells. CD155 is frequently
overexpressed in cancer, where increased expression commonly promotes immune
evasion, tumour-cell migration, invasion, proliferation, and poor prognosis.
For cancer records, CD155/PVR ↑ is generally
tumour-promoting, while CD155 blockade or reduction is usually considered
beneficial; however, the specific receptor interaction should be recorded
when known.
Gene reference;
Cancer review.
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