Oncrasin-1

Oncrasin-1 is a potent and effective anticancer inhibitor that kills various human lung cancer cells with K-Ras mutations at low or submicromolar concentrations; also led to abnormal aggregationof PKCι in nucleus of sensitive cells but not in resistant cells.IC50 value: 1.0 μM(A549, K-ras 12H and p53 Wt) [1]Target: human lung cancer cells with K-Ras mutation; K-Ras/PKCiota pathway inhibitorin vitro: effectively kills various human lung cancer cells with K-Ras mutations at low or submicromolar concentrations. The cytotoxic effects correlated with apoptosis inductionas was evidenced by increase of apoptotic cells and activation of caspase-3 and caspase-8 upon the treatment of oncrasin-1 in sensitive cells.Treatment with oncrasin-1 also led to abnormal aggregationof PKCι in nucleus of sensitive cells but not in resistant cells. Furthermore, oncrasin-1 induced apoptosis was blocked by siRNA of K-Ras or PKCι suggesting that oncrasin-1 is targeted to a novel K-Ras/PKCι pathway [1]. oncrasin-1 treatment led to coaggregation of PKCiota and splicing factors into megaspliceosomes but had no obvious effects on the DNA repair molecule Rad51. Moreover, oncrasin-1 treatment suppressed the phosphorylation of the largest subunit of RNA polymerase II and the expression of intronless reporter genes in sensitive cells but not in resistant cells [2]. in vivo: The in vivo administration of oncrasin-1 suppressed the growth of K-ras mutant human lung tumor xenografts by >70% and prolonged the survival of nude mice bearing these tumors, without causing detectable toxicity [1].

Signaling Pathways >> GPCR/G Protein >> Ras

Research Areas >> Cancer

[1]. Guo W, et al. Identification of a small molecule with synthetic lethality for K-ras and protein kinase C iota. Cancer Res. 2008 Sep 15;68(18):7403-8.

[2]. Guo W, et al. Interruption of RNA processing machinery by a small compound, 1-[(4-chlorophenyl)methyl]-1H-indole-3-carboxaldehyde (oncrasin-1). Mol Cancer Ther. 2009 Feb;8(2):441-8.

ARS-853 | ARS-1620 | NSC 23766 | ML 141 | Salirasib | Pan-RAS-IN-1 | Rhosin hydrochloride | CASIN | EHT 1864 | EHop-016 | 1A-116 | CCG 1423 | K-Ras(G12C) inhibitor 12 | ZCL 278 | Y16