PCLX-001 is a small-molecule compound that acts as an orally active inhibitor of N-myristoyltransferase (NMT), specifically targeting NMT1 and NMT2 with IC50 values of 5 nM and 8 nM, respectively. This compound demonstrates anti-tumor effects and effectively inhibits the early signaling of B-cell receptor (BCR). Consequently, PCLX-001 is a valuable tool for researching B-cell malignancies [1] [2].

We discovered a marked sensitivity of hematological cancer cell lines, including B-cell lymphomas, to the potent pan-NMT inhibitor PCLX-001. PCLX-001 treatment impacts the global myristoylation of lymphoma cell proteins and inhibits early B-cell receptor (BCR) signaling events critical for survival. In addition to abrogating myristoylation of Src family kinases, PCLX-001 also promotes their degradation and, unexpectedly, that of numerous non-myristoylated BCR effectors including c-Myc, NFκB and P-ERK, leading to cancer cell death in vitro and in xenograft models.[2]

Treatment of cultured breast cancer cells with PCLX-001 reduced cell viability in vitro. Daily oral administration of PCLX-001 to immunodeficient mice bearing human MDA-MB-231 breast cancer xenografts produced significant dose-dependent tumor growth inhibition in vivo.[4]