LYP-IN-4

LYP-IN-4 (compound D14), a reversible and selective lymphotyrosine phosphatase (LYP) inhibitor (Ki=1.34 μM, IC50=3.52μM), regulates TCR signaling, increases PD-1/PD-L1 expression, and strengthens anti-tumor immunity. It also stimulates T cell activation, impedes M2 macrophage polarization, and suppresses tumor progression in MC38 isogenic mouse models.