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Bates JN, Getsy PM, Coffee GA, Baby SM, MacFarlane PM, Hsieh YH, Knauss ZT, Bubier JA, Mueller D, Lewis SJ. Lipophilic analogues of D-cysteine prevent and reverse physical dependence to fentanyl in male rats. Front Pharmacol 2024; 14:1336440. [PMID: 38645835 PMCID: PMC11026688 DOI: 10.3389/fphar.2023.1336440] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Accepted: 12/31/2023] [Indexed: 04/23/2024] Open
Abstract
We examined whether co-injections of the cell-permeant D-cysteine analogues, D-cysteine ethyl ester (D-CYSee) and D-cysteine ethyl amide (D-CYSea), prevent acquisition of physical dependence induced by twice-daily injections of fentanyl, and reverse acquired dependence to these injections in freely-moving male Sprague Dawley rats. Injection of the opioid receptor antagonist, naloxone HCl (NLX, 1.5 mg/kg, IV), elicited a series of withdrawal phenomena that included cardiorespiratory and behavioral responses, and falls in body weight and body temperature, in rats that received 5 or 10 injections of fentanyl (125 μg/kg, IV), and the same number of vehicle co-injections. Regarding the development of physical dependence, the NLX-precipitated withdrawal phenomena were markedly reduced in fentanyl-injected rats that had received co-injections of D-CYSee (250 μmol/kg, IV) or D-CYSea (100 μmol/kg, IV), but not D-cysteine (250 μmol/kg, IV). Regarding reversal of established dependence to fentanyl, the NLX-precipitated withdrawal phenomena in rats that had received 10 injections of fentanyl (125 μg/kg, IV) was markedly reduced in rats that received co-injections of D-CYSee (250 μmol/kg, IV) or D-CYSea (100 μmol/kg, IV), but not D-cysteine (250 μmol/kg, IV), starting with injection 6 of fentanyl. This study provides evidence that co-injections of D-CYSee and D-CYSea prevent the acquisition of physical dependence, and reverse acquired dependence to fentanyl in male rats. The lack of effect of D-cysteine suggests that the enhanced cell-penetrability of D-CYSee and D-CYSea into cells, particularly within the brain, is key to their ability to interact with intracellular signaling events involved in acquisition to physical dependence to fentanyl.
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Affiliation(s)
- James N. Bates
- Department of Anesthesiology, University of Iowa Hospitals and Clinics, Iowa City, IA, United States
| | - Paulina M. Getsy
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, United States
| | - Gregory A. Coffee
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, United States
| | - Santhosh M. Baby
- Section of Biology, Galleon Pharmaceuticals, Inc., Horsham, PA, United States
| | - Peter M. MacFarlane
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, United States
| | - Yee-Hsee Hsieh
- Division of Pulmonary, Critical Care and Sleep Medicine, Case Western Reserve University, Cleveland, OH, United States
| | - Zackery T. Knauss
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | | | - Devin Mueller
- Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Stephen J. Lewis
- Department of Pediatrics, Case Western Reserve University, Cleveland, OH, United States
- Department of Pharmacology, Case Western Reserve University, Cleveland, OH, United States
- Functional Electrical Stimulation Center, Case Western Reserve University, Cleveland, OH, United States
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Li X, Zhang J, Liu G, Wu G, Wang R, Zhang J. High altitude hypoxia and oxidative stress: The new hope brought by free radical scavengers. Life Sci 2024; 336:122319. [PMID: 38035993 DOI: 10.1016/j.lfs.2023.122319] [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: 06/21/2023] [Revised: 11/05/2023] [Accepted: 11/27/2023] [Indexed: 12/02/2023]
Abstract
Various strategies can be employed to prevent and manage altitude illnesses, including habituation, oxygenation, nutritional support, and medication. Nevertheless, the utilization of drugs for the prevention and treatment of hypoxia is accompanied by certain adverse effects. Consequently, the quest for medications that exhibit minimal side effects while demonstrating high efficacy remains a prominent area of research. In this context, it is noteworthy that free radical scavengers exhibit remarkable anti-hypoxia activity. These scavengers effectively eliminate excessive free radicals and mitigate the production of reactive oxygen species (ROS), thereby safeguarding the body against oxidative damage induced by plateau hypoxia. In this review, we aim to elucidate the pathogenesis of plateau diseases that are triggered by hypoxia-induced oxidative stress at high altitudes. Additionally, we present a range of free radical scavengers as potential therapeutic and preventive approaches to mitigate the occurrence of common diseases associated with hypoxia at high altitudes.
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Affiliation(s)
- Xuefeng Li
- College of Life Science, Northwest Normal University, Lanzhou 730070, China
| | - Juanhong Zhang
- College of Life Science, Northwest Normal University, Lanzhou 730070, China; School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
| | - Guoan Liu
- College of Life Science, Northwest Normal University, Lanzhou 730070, China
| | - Guofan Wu
- College of Life Science, Northwest Normal University, Lanzhou 730070, China.
| | - Rong Wang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China; Key Laboratory for Prevention and Remediation of Plateau Environmental Damage, 940th Hospital of Joint Logistics Support Force of CPLA, Lanzhou 730050, China.
| | - Junmin Zhang
- School of Pharmacy, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China.
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Wang E, Zhou S, Zeng D, Wang R. Molecular regulation and therapeutic implications of cell death in pulmonary hypertension. Cell Death Discov 2023; 9:239. [PMID: 37438344 DOI: 10.1038/s41420-023-01535-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 06/21/2023] [Accepted: 06/28/2023] [Indexed: 07/14/2023] Open
Abstract
Pulmonary hypertension (PH) is a clinical and pathophysiological syndrome caused by changes in pulmonary vascular structure or function that results in increased pulmonary vascular resistance and pulmonary arterial pressure, and it is characterized by pulmonary endothelial dysfunction, pulmonary artery media thickening, pulmonary vascular remodeling, and right ventricular hypertrophy, all of which are driven by an imbalance between the growth and death of pulmonary vascular cells. Programmed cell death (PCD), different from cell necrosis, is an active cellular death mechanism that is activated in response to both internal and external factors and is precisely regulated by cells. More than a dozen PCD modes have been identified, among which apoptosis, autophagy, pyroptosis, ferroptosis, necroptosis, and cuproptosis have been proven to be involved in the pathophysiology of PH to varying degrees. This article provides a summary of the regulatory patterns of different PCD modes and their potential effects on PH. Additionally, it describes the current understanding of this complex and interconnected process and analyzes the therapeutic potential of targeting specific PCD modes as molecular targets.
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Affiliation(s)
- Enze Wang
- Department of respiratory and critical care medicine, the first affiliated hospital of Anhui medical university, Hefei, 230022, China
| | - Sijing Zhou
- Department of Occupational Disease, Hefei third clinical college of Anhui Medical University, Hefei, 230022, China
| | - Daxiong Zeng
- Department of pulmonary and critical care medicine, Dushu Lake Hospital Affiliated to Soochow University, Medical Center of Soochow University, Suzhou, 215006, China.
| | - Ran Wang
- Department of respiratory and critical care medicine, the first affiliated hospital of Anhui medical university, Hefei, 230022, China.
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Zhang NN, Xu HY, Liu XN, Chen YF, Xia CM, Wu XZ, Lu N. The Inhibitory Role of Hydrogen Sulfide in UII-Induced Cardiovascular Effects and the Underlying Signaling Pathways. Antioxidants (Basel) 2022; 11:2253. [PMID: 36421438 PMCID: PMC9686774 DOI: 10.3390/antiox11112253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/02/2022] [Accepted: 11/11/2022] [Indexed: 12/08/2023] Open
Abstract
Urotensin II (UII) could increase blood pressure and heart rate via increased central reactive oxygen species (ROS) levels. We reported previously that hydrogen sulfide (H2S) exerts an antihypertensive effect by suppressing ROS production. The aim of the current study is to further examine the effects of endogenous and exogenous H2S on UII-induced cardiovascular effects by using an integrated physiology approach. We also use cell culture and molecular biological techniques to explore the inhibitory role of H2S on UII-induced cardiovascular effects. In this study, we found that cystathionine-β-synthase (CBS), the main H2S synthesizing enzyme in CNS, was expressed in neuronal cells of the rostral ventrolateral medulla (RVLM) area. Cellular distribution of CBS and urotensin II receptor (UT) in SH-SY5Y cells that are confirmed as glutamatergic were identified by immunofluorescent and Western blots assay. In Sprague-Dawley rats, administration of UII into the RVLM resulted in an increase in mean arterial pressure (MAP), heart rate (HR), ROS production, nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity, and phosphorylation of p47phox, extracellular signal-regulated protein kinase (ERK)1/2 and p38MAPK, but not stress-activated protein kinase/Jun N-terminal kinase (SAPK/JNK). These effects of UII were attenuated by application into the RVLM of endogenous (L-cysteine, SAM) or exogenous (NaHS) H2S. These results were confirmed in SH-SY5Y cells. UII-induced cardiovascular effects were also significantly abolished by pretreatment with microinjection of Tempol, Apocynin, SB203580, or PD98059 into the RVLM. Preincubated SH-SY5Y cells with Apocynin before administration of UII followed by Western blots assay showed that ROS is in the upstream of p38MAPK/ERK1/2. Gao activation assay in SH-SY5Y cells suggested that H2S may exert an inhibitory role on UII-induced cardiovascular effects by inhibiting the activity of Gαo. These results suggest that both endogenous and exogenous H2S attenuate UII-induced cardiovascular effects via Gαo-ROS-p38MAPK/ERK1/2 pathway.
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Affiliation(s)
- Na-Na Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
- Department of Urology, Fudan Institute of Urology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Hai-Yan Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Xiao-Ni Liu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Yi-Fan Chen
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Chun-Mei Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Xing-Zhong Wu
- Department of Biochemistry and Molecular Biology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
| | - Ning Lu
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai 200032, China
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Zhang R, Li Z, Liu C, Yang Q, Lu D, Ge RL, Ma S, Li Z. Pretreatment with the active fraction of Rhodiola tangutica (Maxim.) S.H. Fu rescues hypoxia-induced potassium channel inhibition in rat pulmonary artery smooth muscle cells. JOURNAL OF ETHNOPHARMACOLOGY 2022; 283:114734. [PMID: 34648900 DOI: 10.1016/j.jep.2021.114734] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Previous studies have shown that the active fraction of Rhodiola tangutica (Maxim.) S.H. Fu (ACRT) dilates pulmonary arteries and thwarts pulmonary artery remodelling. The dilatation effect of ACRT on pulmonary artery vascular rings could be reduced by potassium (K+) channel blockers. However the exact mechanisms of ACRT on ion channels are still unclear. AIM OF THE STUDY This study aimed to investigate whether the effect of ACRT on K+ channels inhibits cell proliferation after pulmonary artery smooth muscle cells (PASMCs) are exposed to hypoxia. MATERIALS AND METHODS The whole-cell patch-clamp method was used to clarify the effect of ACRT on the K+ current (IK) of rat PASMCs exposed to hypoxia. The mRNA and protein expression levels were detected using real-time quantitative polymerase chain reaction (RT-qPCR) and western blotting, respectively. The intracellular calcium (Ca2+) concentration ([Ca2+]i) values in rat PASMCs were detected by laser scanning confocal microscopy. The cell cycle and cell proliferation were assessed using flow cytometry analysis and CCK-8 and EdU assays. RESULTS ACRT pretreatment alleviated the inhibition of IK induced by hypoxia in rat PASMCs. Compared with hypoxia, ACRT upregulated voltage-dependent K+ channel (Kv) 1.5 and big-conductance calcium-activated K+ channel (BKCa) mRNA and protein expression and downregulated voltage-dependent Ca2+ channel (Cav) 1.2 mRNA and protein expression. ACRT decreased [Ca2+]i, inhibited the promotion of cyclin D1 and proliferating cell nuclear antigen (PCNA) expression, and prevented the proliferation of rat PASMCs exposed to hypoxia. CONCLUSION In conclusion, the present study demonstrated that ACRT plays a key role in restoring ion channel function and then inhibiting the proliferation of PASMCs under hypoxia, ACRT has preventive and therapeutic potential in hypoxic pulmonary hypertension.
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Affiliation(s)
- Ruixia Zhang
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China; Qinghai University Affiliated Hospital, Xining, 810001, China
| | - Zhanqiang Li
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China
| | - Chuanchuan Liu
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China; Qinghai University Affiliated Hospital, Xining, 810001, China
| | - Quanyu Yang
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China
| | - Dianxiang Lu
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China
| | - Ri-Li Ge
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China
| | - Shuang Ma
- Research Center for High Altitude Medicine, Qinghai University, Xining, 810001, China; Key Laboratory of Application and Foundation for High Altitude Medicine Research in Qinghai Province, Xining, 810001, China.
| | - Zhanquan Li
- Qinghai University Affiliated Hospital, Xining, 810001, China.
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Pena E, El Alam S, Siques P, Brito J. Oxidative Stress and Diseases Associated with High-Altitude Exposure. Antioxidants (Basel) 2022; 11:267. [PMID: 35204150 PMCID: PMC8868315 DOI: 10.3390/antiox11020267] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2021] [Revised: 01/11/2022] [Accepted: 01/13/2022] [Indexed: 12/12/2022] Open
Abstract
Several diseases associated with high-altitude exposure affect unacclimated individuals. These diseases include acute mountain sickness (AMS), high-altitude cerebral edema (HACE), high-altitude pulmonary edema (HAPE), chronic mountain sickness (CMS), and, notably, high-altitude pulmonary hypertension (HAPH), which can eventually lead to right ventricle hypertrophy and heart failure. The development of these pathologies involves different molecules and molecular pathways that might be related to oxidative stress. Studies have shown that acute, intermittent, and chronic exposure to hypobaric hypoxia induce oxidative stress, causing alterations to molecular pathways and cellular components (lipids, proteins, and DNA). Therefore, the aim of this review is to discuss the oxidative molecules and pathways involved in the development of high-altitude diseases. In summary, all high-altitude pathologies are related to oxidative stress, as indicated by increases in the malondialdehyde (MDA) biomarker and decreases in superoxide dismutase (SOD) and glutathione peroxidase (GPx) antioxidant activity. In addition, in CMS, the levels of 8-iso-PGF2α and H2O2 are increased, and evidence strongly indicates an increase in Nox4 activity in HAPH. Therefore, antioxidant treatments seem to be a promising approach to mitigating high-altitude pathologies.
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Affiliation(s)
- Eduardo Pena
- Institute of Health Studies, Arturo Prat University, Iquique 1100000, Chile; (E.P.); (P.S.); (J.B.)
| | - Samia El Alam
- Institute of Health Studies, Arturo Prat University, Iquique 1100000, Chile; (E.P.); (P.S.); (J.B.)
| | - Patricia Siques
- Institute of Health Studies, Arturo Prat University, Iquique 1100000, Chile; (E.P.); (P.S.); (J.B.)
| | - Julio Brito
- Institute of Health Studies, Arturo Prat University, Iquique 1100000, Chile; (E.P.); (P.S.); (J.B.)
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Ischemia-reperfusion Injury in the Transplanted Lung: A Literature Review. Transplant Direct 2021; 7:e652. [PMID: 33437867 PMCID: PMC7793349 DOI: 10.1097/txd.0000000000001104] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/04/2020] [Accepted: 11/06/2020] [Indexed: 02/07/2023] Open
Abstract
Lung ischemia-reperfusion injury (LIRI) and primary graft dysfunction are leading causes of morbidity and mortality among lung transplant recipients. Although extensive research endeavors have been undertaken, few preventative and therapeutic treatments have emerged for clinical use. Novel strategies are still needed to improve outcomes after lung transplantation. In this review, we discuss the underlying mechanisms of transplanted LIRI, potential modifiable targets, current practices, and areas of ongoing investigation to reduce LIRI and primary graft dysfunction in lung transplant recipients.
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Lee H, Kim KC, Hong YM. Change of voltage-gated potassium channel 1.7 expressions in monocrotaline-induced pulmonary arterial hypertension rat model. KOREAN JOURNAL OF PEDIATRICS 2018; 61:271-278. [PMID: 30274504 PMCID: PMC6172520 DOI: 10.3345/kjp.2018.06457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/01/2018] [Indexed: 11/27/2022]
Abstract
Purpose Abnormal potassium channels expression affects vessel function, including vascular tone and proliferation rate. Diverse potassium channels, including voltage-gated potassium (Kv) channels, are involved in pathological changes of pulmonary arterial hypertension (PAH). Since the role of the Kv1.7 channel in PAH has not been previously studied, we investigated whether Kv1.7 channel expression changes in the lung tissue of a monocrotaline (MCT)-induced PAH rat model and whether this change is influenced by the endothelin (ET)-1 and reactive oxygen species (ROS) pathways. Methods Rats were separated into 2 groups: the control (C) group and the MCT (M) group (60 mg/kg MCT). A hemodynamic study was performed by catheterization into the external jugular vein to estimate the right ventricular pressure (RVP), and pathological changes in the lung tissue were investigated. Changes in protein and mRNA levels were confirmed by western blot and polymerase chain reaction analysis, respectively. Results MCT caused increased RVP, medial wall thickening of the pulmonary arterioles, and increased expression level of ET-1, ET receptor A, and NADPH oxidase (NOX) 4 proteins. Decreased Kv1.7 channel expression was detected in the lung tissue. Inward-rectifier channel 6.1 expression in the lung tissue also increased. We confirmed that ET-1 increased NOX4 level and decreased glutathione peroxidase-1 level in pulmonary artery smooth muscle cells (PASMCs). ET-1 increased ROS level in PASMCs. Conclusion Decreased Kv1.7 channel expression might be caused by the ET-1 and ROS pathways and contributes to MCT-induced PAH.
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Affiliation(s)
- Hyeryon Lee
- Department of Pediatrics, Ewha Womans University School of Medicine, Seoul, Korea
| | - Kwan Chang Kim
- Department of Thoracic and Cardiovascular Surgery, Ewha Womans University School of Medicine, Seoul, Korea
| | - Young Mi Hong
- Department of Pediatrics, Ewha Womans University School of Medicine, Seoul, Korea
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Marshall JD, Bazan I, Zhang Y, Fares WH, Lee PJ. Mitochondrial dysfunction and pulmonary hypertension: cause, effect, or both. Am J Physiol Lung Cell Mol Physiol 2018; 314:L782-L796. [PMID: 29345195 DOI: 10.1152/ajplung.00331.2017] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Pulmonary hypertension describes a heterogeneous disease defined by increased pulmonary artery pressures, and progressive increase in pulmonary vascular resistance due to pathologic remodeling of the pulmonary vasculature involving pulmonary endothelial cells, pericytes, and smooth muscle cells. This process occurs under various conditions, and although these populations vary, the clinical manifestations are the same: progressive dyspnea, increases in right ventricular (RV) afterload and dysfunction, RV-pulmonary artery uncoupling, and right-sided heart failure with systemic circulatory collapse. The overall estimated 5-yr survival rate is 72% in highly functioning patients, and as low as 28% for those presenting with advanced symptoms. Metabolic theories have been suggested as underlying the pathogenesis of pulmonary hypertension with growing evidence of the role of mitochondrial dysfunction involving the major proteins of the electron transport chain, redox-related enzymes, regulators of the proton gradient and calcium homeostasis, regulators of apoptosis, and mitophagy. There remain more studies needed to characterize mitochondrial dysfunction leading to impaired vascular relaxation, increase proliferation, and failure of regulatory mechanisms. The effects on endothelial cells and resulting interactions with their microenvironment remain uncharted territory for future discovery. Additionally, on the basis of observations that the "plexigenic lesions" of pulmonary hypertension resemble the unregulated proliferation of tumor cells, similarities between cancer pathobiology and pulmonary hypertension have been drawn, suggesting interactions between mitochondria and angiogenesis. Recently, mitochondria targeting has become feasible, which may yield new therapeutic strategies. We present a state-of-the-art review of the role of mitochondria in both the pathobiology of pulmonary hypertension and potential therapeutic targets in pulmonary vascular processes.
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Affiliation(s)
- Jeffrey D Marshall
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine , New Haven, Connecticut
| | - Isabel Bazan
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine , New Haven, Connecticut
| | - Yi Zhang
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine , New Haven, Connecticut
| | - Wassim H Fares
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine , New Haven, Connecticut
| | - Patty J Lee
- Section of Pulmonary, Critical Care, and Sleep Medicine, Yale University School of Medicine , New Haven, Connecticut
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Tang H, Zheng Q, Wang J. Pathogenic role of ion channels in pulmonary arterial hypertension. Exp Physiol 2017; 102:1075-1077. [PMID: 28856806 DOI: 10.1113/ep086426] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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MacKay CE, Shaifta Y, Snetkov VV, Francois AA, Ward JPT, Knock GA. ROS-dependent activation of RhoA/Rho-kinase in pulmonary artery: Role of Src-family kinases and ARHGEF1. Free Radic Biol Med 2017; 110:316-331. [PMID: 28673614 PMCID: PMC5542024 DOI: 10.1016/j.freeradbiomed.2017.06.022] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 06/12/2017] [Accepted: 06/29/2017] [Indexed: 12/11/2022]
Abstract
The role of reactive oxygen species (ROS) in smooth muscle contraction is poorly understood. We hypothesised that G-protein coupled receptor (GPCR) activation and hypoxia induce Rho-kinase activity and contraction in rat intra-pulmonary artery (IPA) via stimulation of ROS production and subsequent Src-family kinase (SrcFK) activation. The T-type prostanoid receptor agonist U46619 induced ROS production in pulmonary artery smooth muscle cells (PASMC). U46619 also induced c-Src cysteine oxidation, SrcFK auto-phosphorylation, MYPT-1 and MLC20 phosphorylation and contraction in IPA, and all these responses were inhibited by antioxidants (ebselen, Tempol). Contraction and SrcFK/MYPT-1/MLC20 phosphorylations were also inhibited by combined superoxide dismutase and catalase, or by the SrcFK antagonist PP2, while contraction and MYPT-1/MLC20 phosphorylations were inhibited by the Rho guanine nucleotide exchange factor (RhoGEF) inhibitor Y16. H2O2 and the superoxide-generating quinoledione LY83583 both induced c-Src oxidation, SrcFK auto-phosphorylation and contraction in IPA. LY83583 and H2O2-induced contractions were inhibited by PP2, while LY83583-induced contraction was also inhibited by antioxidants and Y16. SrcFK auto-phosphorylation and MYPT-1/MLC20 phosphorylation was also induced by hypoxia in IPA and this was blocked by mitochondrial inhibitors rotenone and myxothiazol. In live PASMC, sub-cellular translocation of RhoA and the RhoGEF ARHGEF1 was triggered by both U46619 and LY83583 and this translocation was blocked by antioxidants and PP2. RhoA translocation was also inhibited by an ARHGEF1 siRNA. U46619 enhanced ROS-dependent co-immunoprecipitation of ARHGEF1 with c-Src. Our results demonstrate a link between GPCR-induced cytosolic ROS or hypoxia-induced mitochondrial ROS and SrcFK activity, Rho-kinase activity and contraction. ROS and SrcFK activate RhoA via ARHGEF1.
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Affiliation(s)
- Charles E MacKay
- Asthma, Allergy & Lung Biology, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Yasin Shaifta
- Asthma, Allergy & Lung Biology, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Vladimir V Snetkov
- Asthma, Allergy & Lung Biology, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Asvi A Francois
- Cardiovascular Division, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Jeremy P T Ward
- Asthma, Allergy & Lung Biology, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom
| | - Greg A Knock
- Asthma, Allergy & Lung Biology, Faculty of Life Sciences & Medicine, King's College London, London, United Kingdom.
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