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Dai Y, Stuehr DJ. BAY58-2667 Activates Different Soluble Guanylyl Cyclase Species by Distinct Mechanisms that Indicate Its Principal Target in Cells is the Heme-Free Soluble Guanylyl Cyclase-Heat Shock Protein 90 Complex. Mol Pharmacol 2023; 103:286-296. [PMID: 36868790 PMCID: PMC10166446 DOI: 10.1124/molpharm.122.000624] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/14/2022] [Accepted: 02/07/2023] [Indexed: 03/05/2023] Open
Abstract
Nitric oxide (NO)-unresponsive forms of soluble guanylyl cyclase (sGC) exist naturally and in disease can disable NO-sGC-cGMP signaling. Agonists like BAY58-2667 (BAY58) target these sGC forms, but their mechanisms of action in living cells are unclear. We studied rat lung fibroblast-6 cells and human airway smooth muscle cells that naturally express sGC and HEK293 cells that we transfected to express sGC and variants. Cells were cultured to build up different forms of sGC, and we used fluorescence and FRET-based measures to monitor BAY58-driven cGMP production and any protein partner exchange or heme loss events that may occur for each sGC species. We found that: (i) BAY58 activated cGMP production by the apo-sGCβ-Hsp90 species after a 5-8 minute delay that was associated with apo-sGCβ exchanging its Hsp90 partner with an sGCα subunit. (ii) In cells containing an artificially constructed heme-free sGC heterodimer, BAY58 initiated an immediate and three times faster cGMP production. However, this behavior was not observed in cells expressing native sGC under any condition. (iii) BAY58 activated cGMP production by ferric heme sGC only after a 30-minute delay, coincident with it initiating a delayed, slow ferric heme loss from sGCβ We conclude that the kinetics favor BAY58 activation of the apo-sGCβ-Hsp90 species over the ferric heme sGC species in living cells. The protein partner exchange events driven by BAY58 account for the initial delay in cGMP production and also limit the speed of subsequent cGMP production in the cells. Our findings clarify how agonists like BAY58 may activate sGC in health and disease. SIGNIFICANCE STATEMENT: A class of agonists can activate cyclic guanosine monophosphate (cGMP) synthesis by forms of soluble guanylyl cyclase (sGC) that do not respond to NO and accumulate in disease, but the mechanisms of action are unclear. This study clarifies what forms of sGC exist in living cells, which of these can be activated by the agonists, and the mechanisms and kinetics by which each form is activated. This information may help to hasten deployment of these agonists for pharmaceutical intervention and clinical therapy.
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Affiliation(s)
- Yue Dai
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, Ohio
| | - Dennis J Stuehr
- Department of Inflammation and Immunity, Lerner Research Institute, The Cleveland Clinic, Cleveland, Ohio
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Sun Y, Huang Y, Yu W, Chen S, Yao Q, Zhang C, Bu D, Tang C, Du J, Jin H. Sulfhydration-associated phosphodiesterase 5A dimerization mediates vasorelaxant effect of hydrogen sulfide. Oncotarget 2018; 8:31888-31900. [PMID: 28404873 PMCID: PMC5458256 DOI: 10.18632/oncotarget.16649] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2016] [Accepted: 03/16/2017] [Indexed: 12/23/2022] Open
Abstract
The study was designed to examine if the vasorelaxant effect of hydrogen sulfide was mediated by sulfhydration-associated phosphodiesterase (PDE) 5A dimerization. The thoracic aorta of rat was separated and the vasorelaxant effects were examined with in vitro vascular perfusion experiments. The dimerization and sulfhydration of PDE 5A and soluble guanylatecyclase (sGC) were measured. PDE 5A and protein kinase G (PKG) activities were tested. Intracellular cGMP content was detected by enzyme-linked immunosorbent assay (ELISA). The results showed that NaHS relaxed isolated rat vessel rings at an EC50 of (1.79 ± 0.31)×10-5mol/L, associated with significantly increased PKG activity and cGMP content in vascular tissues. Sulfhydration of sGC β1 was increased, while the levels of sGC αβ1 dimers were apparently decreased after incubation with NaHS in vascular tissues. Moreover, PDE 5A homodimers were markedly decreased, and accordingly the PDE 5A activity demonstrated by the content of 5'-GMP was significantly decreased after incubation with NaHS or GYY4137. Mechanistically, both NaHS and GYY4137 significantly enhanced the PDE 5A sulfhydration in vascular tissues. DTT partially abolished the effects of NaHS on PDE 5A activity, cGMP content and vasorelaxation. Therefore, the present study for the first time suggested that H2S exerted vasorelaxant effect probably via sulfhydration-associated PDE 5A dimerization.
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Affiliation(s)
- Yan Sun
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Wen Yu
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Siyao Chen
- Department of Cardiac Surgery, Guangdong General Hospital, Guangzhou, 510000, China
| | - Qiuyu Yao
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Chunyu Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
| | - Dingfang Bu
- Centre Laboratory of Peking University First Hospital, Beijing, 100034, China
| | - Chaoshu Tang
- Department of Physiology and Pathophysiology, Peking University Health Science Center, Beijing, 100034, China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China.,Key Laboratory of Cardiovascular Sciences, Ministry of Education, Beijing, 100034, China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, 100034, China
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Wang X, Yang Y, Yang D, Tong G, Lv S, Lin X, Chen C, Dong W. Tetrandrine prevents monocrotaline-induced pulmonary arterial hypertension in rats through regulation of the protein expression of inducible nitric oxide synthase and cyclic guanosine monophosphate-dependent protein kinase type 1. J Vasc Surg 2017; 64:1468-1477. [PMID: 26527422 DOI: 10.1016/j.jvs.2015.09.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 09/03/2015] [Indexed: 11/29/2022]
Abstract
OBJECTIVE Pulmonary arterial hypertension (PAH) is a fatal disease characterized by a persistent elevation of pulmonary artery pressure and ventricular hypertrophy. Tetrandrine is a bisbenzylisoquinoline alkaloid that can decrease blood pressure, inhibit the proliferation of vascular smooth muscle cells, and block cardiac hypertrophy, but whether it has a therapeutic effect on PAH remains poorly defined. This study was undertaken to investigate the efficacy of tetrandrine on PAH. METHODS Forty-eight male Sprague-Dawley rats were randomly and equally divided into four groups. The control group was injected with normal saline; the others were injected with monocrotaline (MCT) to induce PAH, then treated with saline, tetrandrine, and vardenafil, respectively, from day 21 to day 42. On day 43, we measured the mean pulmonary artery pressure under general anesthesia, dissected the rat, and calculated the right ventricular hypertrophy index [right ventricle/(left ventricle plus septum)]. Later we observed the changes in the pulmonary vascular wall; measured the expression of cyclic guanosine monophosphate-dependent protein kinase type 1 and inducible nitric oxide synthase; measured the levels of superoxide dismutase, glutathione, malondialdehyde, and catalase; and then compared the results among groups. RESULTS Compared with the MCT group, rats treated with tetrandrine had attenuated mean pulmonary artery pressure (20.48 ± 1.49 vs 30.07 ± 1.51; P < .01) and right ventricular hypertrophy index (49.19 ± 2.45 vs 68.50 ± 1.95; P < .01), inhibited proliferation of pulmonary artery smooth muscle cells, and improved endothelial function. Tetrandrine also upregulated the expression of protein kinase type 1 (90.86 ± 1.95 vs 67.34 ± 1.50; P < .01); downregulated the expression of inducible nitric oxide synthase (74.76 ± 1.48 vs 80.19 ± 0.28; P < .01); increased levels of superoxide dismutase (245.54 ± 12.98 vs 166.16 ± 21.42; P < .01), glutathione (0.699 ± 0.032 vs 0.514 ± 0.056; P < .01), and catalase (32.13 ± 2.33 vs 27.19 ± 2.72; P < .01); and decreased malondialdehyde (1.027 ± 0.039 vs 1.462 ± 0.055; P < .01). CONCLUSIONS Tetrandrine alleviated MCT-induced PAH through regulation of nitric oxide signaling pathway and antioxidant and antiproliferation effects.
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Affiliation(s)
- Xiaowu Wang
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Yongchao Yang
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Science/Guangdong General Hospital, Guangzhou, Guangdong, China
| | - Dongpeng Yang
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Guang Tong
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Shanshan Lv
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Xi Lin
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Changfu Chen
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China
| | - Wenpeng Dong
- Department of Cardiovascular Surgery, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, Guangdong, China.
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Yao Q, Huang Y, Liu AD, Zhu M, Liu J, Yan H, Zhang Q, Geng B, Gao Y, Du S, Huang P, Tang C, Du J, Jin H. The vasodilatory effect of sulfur dioxide via SGC/cGMP/PKG pathway in association with sulfhydryl-dependent dimerization. Am J Physiol Regul Integr Comp Physiol 2016; 310:R1073-80. [PMID: 27009048 DOI: 10.1152/ajpregu.00101.2015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 02/22/2016] [Indexed: 12/21/2022]
Abstract
The present study was designed to explore the role of soluble guanylate cyclase (sGC)/cyclic guanosine monophosphate (cGMP)/PKG pathway in sulfur dioxide (SO2)-induced vasodilation. We showed that SO2 induced a concentration-dependent relaxation of phenylephrine (PE)-precontracted rat aortic rings in association with an increase in cGMP concentration, whereas l-aspartic acid β-hydroxamate (HDX), an inhibitor of SO2 synthase, contracted rings in a dose-dependent manner. Pretreatment of aortic rings with the sGC inhibitor ODQ (30 μM) attenuated the vasodilatory effects of SO2, suggesting the involvement of cGMP pathway in SO2-induced vasodilation. Mechanistically, SO2 upregulated the protein levels of sGC and PKG dimers, while HDX inhibited it, indicating SO2 could promote cGMP synthesis through sGC activation. Furthermore, the dimerization of sGC and PKG and vasodilation induced by SO2 in precontracted rings were significantly prevented by thiol reductants dithiothreitol (DTT). In addition, SO2 reduced the activity of phosphodiesterase type 5 (PDE5), a cGMP-specific hydrolytic enzyme, implying that SO2 elevated cGMP concentration by inhibiting its hydrolysis. Hence, SO2 exerted its vasodilatory effects at least partly by promoting disulfide-dependent dimerization of sGC and PKG, resulting in an activated sGC/cGMP/PKG pathway in blood vessels. These findings revealed a new mode of action and mechanisms by which SO2 regulated the vascular tone.
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Affiliation(s)
- Qiuyu Yao
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Yaqian Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Angie Dong Liu
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden
| | - Mingzhu Zhu
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Jia Liu
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Hui Yan
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Qingyou Zhang
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Bin Geng
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing, People's Republic of China
| | - Yuansheng Gao
- Department of Physiology and Pathophysiology, Peking University Health Science Centre, Beijing, People's Republic of China
| | - Shuxu Du
- Department of Pediatrics, Beijing Shijitan Hospital, Beijing, People's Republic of China; and
| | - Pan Huang
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China
| | - Chaoshu Tang
- Department of Medical and Health Sciences, Linköping University, Linköping, Sweden; Key Laboratory of Cardiovascular Sciences, Ministry of Education, Beijing, People's Republic of China
| | - Junbao Du
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China; Key Laboratory of Cardiovascular Sciences, Ministry of Education, Beijing, People's Republic of China
| | - Hongfang Jin
- Department of Pediatrics, Peking University First Hospital, Beijing, People's Republic of China;
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