IGF-1R inhibitor-2 (example 121) is a compound that inhibits the insulin-like growth factor-1 receptor (IGF-1R). By downregulating the IGF-1R, it has the potential to reverse the transformed phenotype of tumor cells and make them more susceptible to apoptosis.
SNU-BP is an agonist of PPAR-gamma, inhibiting lipopolysaccharide (LPS)-induced NO production and pro-inflammatory cytokines. SNU-BP potentiates interleukin-4-induced arginase-1 expression, and promotes microglial polarization toward an M2 anti-inflammatory phenotype.
BMS-214662 is a Farnesyltransferase inhibitor , is also a nonsedating benzodiazepine derivative with potential antineoplastic activity. BMS-214662 inhibits the enzyme farnesyltransferase and the post-translational farnesylation of number of proteins involved in signal transduction, which may result in the inhibition of Ras function and apoptosis in susceptible tumor cells. This agent may reverse the malignant phenotype of H-Ras-transformed cells and has been shown to be active against tumor cells with and without Ras mutations.
XR3054 is a novel inhibitor of farnesyl protein transferase (FPTase). XR3054 inhibited the proliferation of the prostatic cancer cell lines LnCAP and PC3 and the colon carcinoma SW480 and HT1080 (IC50 values of 12.4, 12.2, 21.4 and 8.8 microM, respectively) but was relatively inactive when tested against a panel of breast carcinoma cell lines. The activity did not relate to the presence of mutant or wild-type ras in the cell lines tested. In conclusion XR3054 inhibits ras farnesylation, MAP kinase activation and anchorage-independent growth in NIH 3T3 transformed with v12 H-ras. Since the antiproliferative effect of the compound is not related to the ras phenotype, XR3054 may also have effects on other cell signaling mechanisms.
XR9051 is as a potent modulator of P-glycoprotein (P-gp)-mediated multidrug resistance (MDR) following a synthetic chemistry programme based on a natural product lead compound. XR9051 was shown to be a potent inhibitor of the binding of the cytotoxic to P-glycoprotein (EC50 = 1.4 + - 0.5 nM). XR9051 reverses the MDR phenotype through direct interaction with P-glycoprotein.