1
|
Olivencia MA, Gil de Biedma-Elduayen L, Giménez-Gómez P, Barreira B, Fernández A, Angulo J, Colado MI, O'Shea E, Perez-Vizcaino F. Oxidized soluble guanylyl cyclase causes erectile dysfunction in alcoholic mice. Br J Pharmacol 2023; 180:2361-2376. [PMID: 37021655 DOI: 10.1111/bph.16087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 03/13/2023] [Accepted: 04/03/2023] [Indexed: 04/07/2023] Open
Abstract
BACKGROUND AND PURPOSE Alcohol abuse has been associated with erectile dysfunction (ED), but the implicated molecular mechanisms are unresolved. This study analyses the role of alterations in soluble guanylyl cyclase (sGC) in ED. EXPERIMENTAL APPROACH ED was analysed in adult male C57BL/6J mice subjected to the Chronic Intermittent Ethanol (CIE) paradigm. Erectile function was assessed in anaesthetised mice in vivo by evaluating intracavernosal pressure (ICP) and in vitro in isolated mice corpora cavernosa (CC) mounted in a myograph. Protein expression and reactive oxygen species were analysed by western blot and dihydroethidium staining, respectively. KEY RESULTS In CIE mice, we observed a significant decrease in the relaxant response of the CC to stimulation of NO release from nitrergic nerves by electrical field stimulation, to NO release from endothelial cells by acetylcholine, to the PDE5 inhibitor sildenafil, and to the sGC stimulator riociguat. Conversely, the response to the sGC activator cinaciguat, whose action is independent of the oxidation state of sGC, was significantly enhanced in these CC. The responses to adenylyl cyclase stimulation with forskolin were unchanged. We found an increase in reactive oxygen species in the CC from CIE mice as well as an increase in CYP2E1 and NOX2 protein expression. In vivo pre-treatment with tempol prevented alcohol-induced erectile dysfunction. CONCLUSIONS AND IMPLICATIONS Our results demonstrate that alcoholic mice show ED in vitro and in vivo due to an alteration in the redox state of sGC and suggest that sGC activators may be effective in ED associated with alcoholism.
Collapse
Affiliation(s)
- Miguel A Olivencia
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- CIBER Enfermedades Respiratorias, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Leticia Gil de Biedma-Elduayen
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre, Madrid, Spain
- Red de Investigación en Atención Primaria de Adicciones del Instituto de Salud Carlos III, Madrid, Spain
- Instituto Universitario de Investigación Neuroquímica (IUIN), Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Pablo Giménez-Gómez
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre, Madrid, Spain
- Red de Investigación en Atención Primaria de Adicciones del Instituto de Salud Carlos III, Madrid, Spain
- Instituto Universitario de Investigación Neuroquímica (IUIN), Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Bianca Barreira
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- CIBER Enfermedades Respiratorias, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| | - Argentina Fernández
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
- Servicio de Histología-Investigación, Unidad de Investigación Traslacional en Cardiología (IRYCIS-UFV), Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Javier Angulo
- Centro de Investigación Biomédica en Red de Fragilidad y Envejecimiento Saludable (CIBERFES), Instituto de Salud Carlos III, Madrid, Spain
- Servicio de Histología-Investigación, Unidad de Investigación Traslacional en Cardiología (IRYCIS-UFV), Hospital Universitario Ramón y Cajal, Madrid, Spain
| | - Maria Isabel Colado
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre, Madrid, Spain
- Red de Investigación en Atención Primaria de Adicciones del Instituto de Salud Carlos III, Madrid, Spain
- Instituto Universitario de Investigación Neuroquímica (IUIN), Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Esther O'Shea
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- Instituto de Investigación Sanitaria Hospital 12 de Octubre, Madrid, Spain
- Red de Investigación en Atención Primaria de Adicciones del Instituto de Salud Carlos III, Madrid, Spain
- Instituto Universitario de Investigación Neuroquímica (IUIN), Facultad de Medicina, Universidad Complutense, Madrid, Spain
| | - Francisco Perez-Vizcaino
- Departamento de Farmacologia y Toxicologia, Facultad de Medicina, Universidad Complutense, Madrid, Spain
- CIBER Enfermedades Respiratorias, Madrid, Spain
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain
| |
Collapse
|
2
|
Tawa M, Okamura T. Factors influencing the soluble guanylate cyclase heme redox state in blood vessels. Vascul Pharmacol 2022; 145:107023. [PMID: 35718342 DOI: 10.1016/j.vph.2022.107023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 06/09/2022] [Accepted: 06/12/2022] [Indexed: 11/15/2022]
Abstract
Soluble guanylate cyclase (sGC) plays an important role in maintaining vascular homeostasis, as an acceptor for the biological messenger nitric oxide (NO). However, only reduced sGC (with a ferrous heme) can be activated by NO; oxidized (ferric heme) and apo (absent heme) sGC cannot. In addition, the proportions of reduced, oxidized, and apo sGC change under pathological conditions. Although diseased blood vessels often show decreased NO bioavailability in the vascular wall, a shift of sGC heme redox balance in favor of the oxidized/apo forms can also occur. Therefore, sGC is of growing interest as a drug target for various cardiovascular diseases. Notably, the balance between NO-sensitive reduced sGC and NO-insensitive oxidized/apo sGC in the body is regulated in a reversible manner by various biological molecules and proteins. Many studies have attempted to identify endogenous factors and determinants that influence this redox state. For example, various reactive nitrogen and oxygen species are capable of inducing the oxidation of sGC heme. Conversely, a heme reductase and some antioxidants reduce the ferric heme in sGC to the ferrous state. This review summarizes the factors and mechanisms identified by these studies that operate to regulate the sGC heme redox state.
Collapse
Affiliation(s)
- Masashi Tawa
- Department of Pathological and Molecular Pharmacology, Faculty of Pharmacy, Osaka Medical and Pharmaceutical University, Takatsuki, Osaka 569-1094, Japan.
| | - Tomio Okamura
- Emeritus Professor, Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| |
Collapse
|
3
|
Impact of cigarette smoking on nitric oxide-sensitive and nitric oxide-insensitive soluble guanylate cyclase-mediated vascular tone regulation. Hypertens Res 2019; 43:178-185. [PMID: 31784677 DOI: 10.1038/s41440-019-0363-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 10/21/2019] [Accepted: 10/30/2019] [Indexed: 11/09/2022]
Abstract
Cigarette smoking induces vascular endothelial dysfunction characterized by impaired nitric oxide (NO) bioavailability. There are two types of soluble guanylate cyclase (sGC), which is a cellular target of NO: NO-sensitive reduced form (the heme moiety with a ferrous iron) and NO-insensitive oxidized (the heme moiety with a ferric iron)/heme-free form. This study investigated the influence of cigarette smoking on NO-sensitive and NO-insensitive sGC-mediated vascular tone regulation in organ chamber experiments with isolated rat and human arteries. The rats were subcutaneously administered phosphate-buffered saline (PBS), nicotine-free cigarette smoke extract (N(-)-CSE) or nicotine-containing cigarette smoke extract (N(+)-CSE) for 4 weeks. Plasma thiobarbituric acid reactive substance (TBARS) levels were higher in the N(+)-CSE group than those in the N(-)-CSE group, and TBARS levels for these groups were higher than those for the PBS group. In the aorta and the pulmonary artery in rats administered N(-)-CSE or N(+)-CSE, acetylcholine-induced relaxation was significantly impaired compared with that in rats administered PBS; there was no significant difference in the relaxation between the N(-)-CSE and N(+)-CSE groups. However, sodium nitroprusside (NO-sensitive sGC stimulant)- and BAY 60-2770 (NO-insensitive sGC stimulant)-induced relaxations were not different among the three groups, regardless of the vessel type. In addition, in the human gastroepiploic artery, the relaxant responses to these sGC-targeting drugs were identical between nonsmokers and smokers. These findings suggest that NO-sensitive and NO-insensitive sGC-mediated vascular tone regulation functions normally even in blood vessels damaged by cigarette smoking.
Collapse
|