YC-1 Stimulates the Expression of Gaseous Monoxide-Generating Enzymes in Vascular Smooth Muscle Cells
Liu, Xiao-ming; Peyton, Kelly J.; Mendelev, Natalia N.; Wang, Hong; Tulis, David A.; Durante, William
The benzylindazole derivative 3-(5′-hydroxymethyl-2′-furyl)-1-benzyl indazole (YC-1) is an allosteric stimulator of soluble guanylate cyclase (sGC) that sensitizes the enzyme to the gaseous ligands carbon monoxide (CO) and nitric oxide (NO). In this study, we examined whether YC-1 also promotes the production of these gaseous monoxides by stimulating the expression of the inducible isoforms of heme oxygenase (HO-1) and NO synthase (iNOS) in vascular smooth muscle cells (SMCs). YC-1 increased HO-1 mRNA, protein, and promoter activity and potentiated cytokine-mediated expression of iNOS protein and NO synthesis by SMCs. The induction of HO-1 by YC-1 was unchanged by the sGC inhibitor, 1H-(1,2,4)oxadiazolo[4,3-α]quinozalin-1-one (ODQ) or by the protein kinase G inhibitors (8R,9S,11S)-(-)-2-methyl-9-methoxyl-9-methoxycarbonyl-8-methyl-2,3,9,10-tetrahydro-8,11-epoxy-1H,8H,11H-2,7b,11a-triazadibenzo(a,g)cyclocta9(cde)trinen-1-one (KT 5823) and YGRKKRRQRRRPPLRKKKKKH-amide (DT-2) and was not duplicated by 8-bromo-cGMP or the NO-independent sGC stimulator 5-cyclopropyl-2[1-(2-fluorobenzyl)-1H-pyrazolo [3,4-b] pyridine-3-yl] pyrimidin-4-ylamine (BAY 41-2272). However, the YC-1-mediated induction of HO-1 was inhibited by the phosphatidylinositol-3-kinase (PI3K) inhibitors wortmannin and 2-(4-morpholinyl)-8-phenyl-1(4H)-benzopyran-4-one hydrochloride (LY294002). In contrast, the enhancement of cytokine-stimulated iNOS expression and NO production by YC-1 was prevented by ODQ and the protein kinase A inhibitor (9S,10S, 12R)-2,3,9,10,11,12-hexahydro-10-hydroxy-9-methyl-1-oxo-9, 12-epoxy-1H-diindolo(1,2,3-fg:3′,2′,1′-kl)pyrrolo(3,4-i)(1,6)-benzodiazocine-10-carboxylic acid hexyl ester (KT 5720) and was mimicked by 8-bromo-cGMP and BAY 41-2272. In conclusion, these studies demonstrate that YC-1 stimulates the expression of HO-1 and iNOS in vascular SMCs via the PI3K and sGC-cGMP-protein kinase A pathway, respectively. The ability of YC-1 to sensitize sGC to gaseous monoxides and simultaneously stimulate their production through the induction of HO-1 and iNOS provides a potent mechanism by which the cGMP-dependent and -independent biological actions of this agent are amplified. Originally published Molecular Pharmacology, Vol. 75, No. 1, Jan 2009
Liu, Xiao-ming, & Peyton, Kelly J., & Mendelev, Natalia N., & Wang, Hong, & Tulis, David A., & Durante, William. (January 2009). YC-1 Stimulates the Expression of Gaseous Monoxide-Generating Enzymes in Vascular Smooth Muscle Cells. Molecular Pharmacology, 75(1), 208- 217. Retrieved from http://hdl.handle.net/10342/3332
Liu, Xiao-ming, and Peyton, Kelly J., and Mendelev, Natalia N., and Wang, Hong, and Tulis, David A., and Durante, William. "YC-1 Stimulates the Expression of Gaseous Monoxide-Generating Enzymes in Vascular Smooth Muscle Cells". Molecular Pharmacology. 75:1. (208-217), January 2009. June 21, 2018. http://hdl.handle.net/10342/3332.
Liu, Xiao-ming and Peyton, Kelly J. and Mendelev, Natalia N. and Wang, Hong and Tulis, David A. and Durante, William, "YC-1 Stimulates the Expression of Gaseous Monoxide-Generating Enzymes in Vascular Smooth Muscle Cells," Molecular Pharmacology 75, no. 1 (January 2009), http://hdl.handle.net/10342/3332 (accessed June 21, 2018).
Liu, Xiao-ming, Peyton, Kelly J., Mendelev, Natalia N., Wang, Hong, Tulis, David A., Durante, William. YC-1 Stimulates the Expression of Gaseous Monoxide-Generating Enzymes in Vascular Smooth Muscle Cells. Molecular Pharmacology. January 2009; 75(1): 208-217. http://hdl.handle.net/10342/3332. Accessed June 21, 2018.
East Carolina University