Investigated for use/treatment in crohn's disease, inflammatory bowel disease, kidney cancer, leukemia (lymphoid), and prostate cancer.
Mechanism of action
OSI-461 is cGMP phosphodiesterase (cGMP-PDEs) inhibitors which is designed to lead to sustained activation of the intracellular signaling protein, Protein Kinase G (PKG), and subsequent stimulation of apoptosis through the c-Jun kinase pathway. Broad spectrum inhibition of cGMP-PDEs have been shown to lead to elevation in cGMP levels and the sustained activation of PKG. This in turn directly phosphorylates MEKK1 leading to activation of the N-terminal c-Jun kinase (JNK-1) pathway, a known pro-apoptotic signaling pathway.
Shimizu M, Suzui M, Deguchi A, Lim JT, Xiao D, Hayes JH, Papadopoulos KP, Weinstein IB: Synergistic effects of acyclic retinoid and OSI-461 on growth inhibition and gene expression in human hepatoma cells. Clin Cancer Res. 2004 Oct 1;10(19):6710-21. [PubMed:15475462 ]
Plays a role in signal transduction by regulating the intracellular concentration of cyclic nucleotides. This phosphodiesterase catalyzes the specific hydrolysis of cGMP to 5'-GMP (PubMed:9714779, PubMed:15489334). Specifically regulates nitric-oxide-generated cGMP (PubMed:15489334).