tcsc1386 PQ401

PQ401, a selective insulin-like growth factor-1 receptor blocker, is a novel diarylurea compound that inhibits IGF1R autophosphorylation with IC50 < 1 uM.

IC50 Value: 12 uM (inhibited autophosphorylation of the IGF-IR in cultured human MCF-7 cells) [1]

Target: IGF1R

in vitro: PQ401 inhibited autophosphorylation of the IGF-IR in cultured human MCF-7 cells with an IC50 of 12 micromol/L and autophosphorylation of the isolated kinase domain of the IGF-IR with an IC50 <1 micromol/L. In addition,PQ401 inhibited the growth of cultured breast cancer cells in serum at 10 micromol/L. PQ401 was even more effective at inhibiting IGF-I-stimulated growth of MCF-7 cells (IC50, 6 micromol/L) [1]. Twenty-four hours of treatment with 15 micromol/L PQ401 induced caspase-mediated apoptosis. Pretreatment with PQ401 before IGF-1 (10 ng in 0.5 μl), both administered to the POA 30 min apart, showed significant attenuation of the IGF-1-induced increase in core body temperature (p < 0.05). A similar attenuated hyperthermic response to IGF-1 by PQ401 pretreatment is observed when the temperature of the BAT is measured [3].

in vivo: IGF1R inhibition by PQ401 exerted no significant effects on diabetic kidney disease parameters, arguing against a role for IGF-I in the pathogenesis of diabetic kidney disease. However, PQ401 affects normal kidneys, inducing renal hypertrophy as well as collagen and fat accumulation, with increased renal IGF-I mRNA, suggestive of a damage-regeneration process [2].

Clinical trial: No Development Reported