| References: |
NT157 significantly affects the cells' migratory ability, as confirmed by a wound-healing assay. NT157 induces cytostatic effects, as evidenced by G2/M cell cycle arrest, and does not affect apoptosis. NT157, a novel small-molecule that specifically targets IRS protein, in OS cells. NT157 is a small-molecule inhibitor that induces Ser-phosphorylation and consequently the degradation of IRS-1 and IRS-2. NT157 efficiently affects migration ability of MG-63 and U-2OS OS cells. NT157 treatment induces cell cycle arrest and inhibits IGF system signaling. The density of LNCaP cells grown in FBS was decreased approximately 20% at 1 μM, approximately 70% at 2 μM, and >90% at 5 μM (IC50, 1.4 μM). Growth of LNCaP cells is suppressed >60% when cultured in CSS but still exhibited significant density at 2 μM and maximal decreased density at 5 μM. The density of FBS-cultured PC3 cells was similarly decreased by NT157 treatment (40% at 2 μM and > 70% at 5 μM; IC50, 2.5 μM).
in vivo: NT157 suppresses growth of LNCaP xenografts following castration. NT157 treatment affects IGF1R and IRS targets in xenografts and significantly delays castration-resistant progression of LNCaP androgen-responsive xenografts when combined with castration. NT157 potentiates docetaxel activity in PC3 xenografts. |
