1
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Yokomizo S, Kopp T, Roessing M, Morita A, Lee S, Cho S, Ogawa E, Komai E, Inoue K, Fukushi M, Feil S, Kim HH, Bragin DE, Gerashchenko D, Huang PL, Kashiwagi S, Atochin DN. Near-Infrared II Photobiomodulation Preconditioning Ameliorates Stroke Injury via Phosphorylation of eNOS. Stroke 2024; 55:1641-1649. [PMID: 38572660 PMCID: PMC11126363 DOI: 10.1161/strokeaha.123.045358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Accepted: 02/28/2024] [Indexed: 04/05/2024]
Abstract
BACKGROUND The current management of patients with stroke with intravenous thrombolysis and endovascular thrombectomy is effective only when it is timely performed on an appropriately selected but minor fraction of patients. The development of novel adjunctive therapy is highly desired to reduce morbidity and mortality with stroke. Since endothelial dysfunction is implicated in the pathogenesis of stroke and is featured with suppressed endothelial nitric oxide synthase (eNOS) with concomitant nitric oxide deficiency, restoring endothelial nitric oxide represents a promising approach to treating stroke injury. METHODS This is a preclinical proof-of-concept study to determine the therapeutic effect of transcranial treatment with a low-power near-infrared laser in a mouse model of ischemic stroke. The laser treatment was performed before the middle cerebral artery occlusion with a filament. To determine the involvement of eNOS phosphorylation, unphosphorylatable eNOS S1176A knock-in mice were used. Each measurement was analyzed by a 2-way ANOVA to assess the effect of the treatment on cerebral blood flow with laser Doppler flowmetry, eNOS phosphorylation by immunoblot analysis, and stroke outcomes by infarct volumes and neurological deficits. RESULTS Pretreatment with a 1064-nm laser at an irradiance of 50 mW/cm2 improved cerebral blood flow, eNOS phosphorylation, and stroke outcomes. CONCLUSIONS Near-infrared II photobiomodulation could offer a noninvasive and low-risk adjunctive therapy for stroke injury. This new modality using a physical parameter merits further consideration to develop innovative therapies to prevent and treat a wide array of cardiovascular diseases.
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Affiliation(s)
- Shinya Yokomizo
- Department of Neurology, MassGeneral Institute of Neurodegenerative Diseases, Massachusetts General Hospital, 114 16th Street, Charlestown, MA, 02129, USA
- Department of Radiological Science, Tokyo Metropolitan University, 7-2-10 Higashi-Ogu, Arakawa, Tokyo 116-8551, Japan
| | - Timo Kopp
- Interfaculty Institute of Biochemistry (IFIB), University of Tübingen, Auf der Morgenstelle 34, Tübingen 72076, Germany
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
| | - Malte Roessing
- Interfaculty Institute of Biochemistry (IFIB), University of Tübingen, Auf der Morgenstelle 34, Tübingen 72076, Germany
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
| | - Atsuyo Morita
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
| | - Seeun Lee
- Stroke and Neurovascular Regulation Laboratory, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
- School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Suin Cho
- Stroke and Neurovascular Regulation Laboratory, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
- School of Korean Medicine, Pusan National University, Yangsan 50612, Republic of Korea
| | - Emiyu Ogawa
- School of Allied Health Science, Kitasato University, 1-15-1 Kitasato Minami-ku Sagamihara, Kanagawa, Japan
| | - Eri Komai
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
| | - Kazumasa Inoue
- Department of Radiological Science, Tokyo Metropolitan University, 7-2-10 Higashi-Ogu, Arakawa, Tokyo 116-8551, Japan
| | - Masahiro Fukushi
- Department of Radiological Science, Tokyo Metropolitan University, 7-2-10 Higashi-Ogu, Arakawa, Tokyo 116-8551, Japan
| | - Susanne Feil
- Interfaculty Institute of Biochemistry (IFIB), University of Tübingen, Auf der Morgenstelle 34, Tübingen 72076, Germany
| | - Hyung-Hwan Kim
- Stroke and Neurovascular Regulation Laboratory, Department of Radiology, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA 02129, USA
| | - Denis E. Bragin
- Lovelace Biomedical Research Institute, 2425 Ridgecrest Dr. SE, Albuquerque, NM 87108, USA
- Department of Neurology, The University of New Mexico School of Medicine, MSC08 4720, 1 UNM, Albuquerque, NM 87131, USA
| | - Dmitry Gerashchenko
- Department of Psychiatry, Boston VA Medical Center West Roxbury, Veterans Affairs Boston Healthcare System and Harvard Medical School, 1400 VFW Pkwy, West Roxbury, MA 02132, USA
| | - Paul L. Huang
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
| | - Satoshi Kashiwagi
- Department of Psychiatry, Boston VA Medical Center West Roxbury, Veterans Affairs Boston Healthcare System and Harvard Medical School, 1400 VFW Pkwy, West Roxbury, MA 02132, USA
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, 149 13 Street, Charlestown, MA, 02129, USA
| | - Dmitriy N. Atochin
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital 149 13 Street, Charlestown, MA 02129, USA
- Department of Psychiatry, Boston VA Medical Center West Roxbury, Veterans Affairs Boston Healthcare System and Harvard Medical School, 1400 VFW Pkwy, West Roxbury, MA 02132, USA
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2
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Bahadoran Z, Mirmiran P, Ghasemi A. Adipose organ dysfunction and type 2 diabetes: Role of nitric oxide. Biochem Pharmacol 2024; 221:116043. [PMID: 38325496 DOI: 10.1016/j.bcp.2024.116043] [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: 10/30/2023] [Revised: 01/07/2024] [Accepted: 02/01/2024] [Indexed: 02/09/2024]
Abstract
Adipose organ, historically known as specialized lipid-handling tissue serving as the long-term fat depot, is now appreciated as the largest endocrine organ composed of two main compartments, i.e., subcutaneous and visceral adipose tissue (AT), madding up white and beige/brown adipocytes. Adipose organ dysfunction manifested as maldistribution of the compartments, hypertrophic, hypoxic, inflamed, and insulin-resistant AT, contributes to the development of type 2 diabetes (T2D). Here, we highlight the role of nitric oxide (NO·) in AT (dys)function in relation to developing T2D. The key aspects determining lipid and glucose homeostasis in AT depend on the physiological levels of the NO· produced via endothelial NO· synthases (eNOS). In addition to decreased NO· bioavailability (via decreased expression/activity of eNOS or scavenging NO·), excessive NO· produced by inducible NOS (iNOS) in response to hypoxia and AT inflammation may be a critical interfering factor diverting NO· signaling to the formation of reactive oxygen and nitrogen species, resulting in AT and whole-body metabolic dysfunction. Pharmacological approaches boosting AT-NO· availability at physiological levels (by increasing NO· production and its stability), as well as suppression of iNOS-NO· synthesis, are potential candidates for developing NO·-based therapeutics in T2D.
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Affiliation(s)
- Zahra Bahadoran
- Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parvin Mirmiran
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Asghar Ghasemi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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3
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Nguyen TD, Rahman NT, Sessa WC, Lee MY. Endothelial nitric oxide synthase (eNOS) S1176 phosphorylation status governs atherosclerotic lesion formation. Front Cardiovasc Med 2023; 10:1279868. [PMID: 38034389 PMCID: PMC10683645 DOI: 10.3389/fcvm.2023.1279868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Accepted: 10/11/2023] [Indexed: 12/02/2023] Open
Abstract
Objective We have previously demonstrated the in vivo importance of the Akt-eNOS substrate-kinase relationship, as defective postnatal angiogenesis characteristic of global Akt1-null mice is rescued when bred to 'gain-of-function' eNOS S1176D mutant mice. While multiple studies support the vascular protective role of endothelial NO generation, the causal role of Akt1-dependent eNOS S1176 phosphorylation during atherosclerotic plaque formation is not yet clear. Approach and results We herein bred congenic 'loss-of-function' eNOS S1176A and 'gain-of-function' eNOS S1176D mutant mice to the exacerbated atherogenic Akt1-/-; ApoE-/- double knockout mice to definitively test the importance of Akt-mediated eNOS S1176 phosphorylation during atherogenesis. We find that a single amino acid substitution at the eNOS S1176 phosphorylation site yields divergent effects on atherosclerotic plaque formation, as an eNOS phospho-mimic aspartate (D) substitution at S1176 leads to favorable lipid profiles and decreased indices of atherosclerosis, even when on a proatherogenic Akt1 global deletion background. Conversely, mice harboring an unphosphorylatable mutation to alanine (S1176A) result in increased plasma lipids, increased lesion formation and cellular apoptosis, phenocopying the physiological consequence of eNOS deletion and/or impaired enzyme function. Furthermore, gene expression analyses of whole aortas indicate a combinatorial detriment from NO deficiency and Western Diet challenge, as 'loss-of-function' eNOS S1176A mice on a Western Diet present a unique expression pattern indicative of augmented T-cell activity when compared to eNOS S1176D mice. Conclusions By using genetic epistasis approaches, we conclusively demonstrate that Akt-mediated eNOS S1176 phosphorylation and subsequent eNOS activation remains to be the most physiologically relevant method of NO production to promote athero-protective effects.
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Affiliation(s)
- Tung D. Nguyen
- Department of Physiology and Biophysics, Center for Cardiovascular Research, University of Illinois at Chicago School of Medicine, Chicago, IL, United States
| | - Nur-Taz Rahman
- Bioinformatics Support Group, Yale University Cushing/Whitney Medical Library, New Haven, CT, United States
| | - William C. Sessa
- Department of Pharmacology, Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT, United States
| | - Monica Y. Lee
- Department of Physiology and Biophysics, Center for Cardiovascular Research, University of Illinois at Chicago School of Medicine, Chicago, IL, United States
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4
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Huang S, Taylor CG, Zahradka P. Growth State-Dependent Activation of eNOS in Response to DHA: Involvement of p38 MAPK. Int J Mol Sci 2023; 24:ijms24098346. [PMID: 37176054 PMCID: PMC10179717 DOI: 10.3390/ijms24098346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 04/19/2023] [Accepted: 05/01/2023] [Indexed: 05/15/2023] Open
Abstract
Our laboratory previously reported that docosahexaenoic acid (DHA) differentially activates p38 mitogen-activated protein kinase (MAPK) in growing and quiescent human endothelial cells, which represent the dysfunctional and healthy states in vivo, respectively. Since endothelial nitric oxide synthase (eNOS) activity differs between healthy and dysfunctional endothelial cells, and p38 MAPK reportedly regulates both the activity and expression of eNOS, we hypothesized that the beneficial actions of DHA on endothelial cells are due to eNOS activation by p38 MAPK. The contribution of mitogen- and stress-activated protein kinase (MSK), a p38 MAPK substrate, was also investigated. Growing and quiescent EA.hy926 cells, prepared on Matrigel®-coated plates, were incubated with inhibitors of p38MAPK or MSK before adding DHA. eNOS phosphorylation and levels were quantified by Western blotting. Treatment with 20 µM DHA activated eNOS in both growth states whereas 125 µM DHA suppressed eNOS activation in growing cells. Quiescent cells had higher basal levels of eNOS than growing cells, while 125 µM DHA decreased eNOS levels in both growth states. p38 MAPK inhibition enhanced eNOS activation in quiescent cells but suppressed it in growing cells. Interestingly, 125 µM DHA counteracted these effects of p38 MAPK inhibition in both growth states. MSK was required for eNOS activation in both growth states, but it only mediated eNOS activation by DHA in quiescent cells. MSK thus affects eNOS via a pathway independent of p38MAPK. Quiescent cells were also more resistant to the apoptosis-inducing effect of 125 µM DHA compared to growing cells. The growth state-dependent regulation of p38MAPK and eNOS by DHA provides novel insight into the molecular mechanisms by which DHA influences endothelial cell function.
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Affiliation(s)
- Shiqi Huang
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
| | - Carla G Taylor
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0W2, Canada
| | - Peter Zahradka
- Department of Food and Human Nutritional Sciences, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Canadian Centre for Agri-Food Research in Health and Medicine, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada
- Department of Physiology and Pathophysiology, University of Manitoba, Winnipeg, MB R3E 0W2, Canada
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5
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Kashiwagi S, Morita A, Yokomizo S, Ogawa E, Komai E, Huang PL, Bragin DE, Atochin DN. Photobiomodulation and nitric oxide signaling. Nitric Oxide 2023; 130:58-68. [PMID: 36462596 PMCID: PMC9808891 DOI: 10.1016/j.niox.2022.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 11/05/2022] [Accepted: 11/27/2022] [Indexed: 12/05/2022]
Abstract
Nitric oxide (NO) is a well-known gaseous mediator that maintains vascular homeostasis. Extensive evidence supports that a hallmark of endothelial dysfunction, which leads to cardiovascular diseases, is endothelial NO deficiency. Thus, restoring endothelial NO represents a promising approach to treating cardiovascular complications. Despite many therapeutic agents having been shown to augment NO bioavailability under various pathological conditions, success in resulting clinical trials has remained elusive. There is solid evidence of diverse beneficial effects of the treatment with low-power near-infrared (NIR) light, defined as photobiomodulation (PBM). Although the precise mechanisms of action of PBM are still elusive, recent studies consistently report that PBM improves endothelial dysfunction via increasing bioavailable NO in a dose-dependent manner and open a feasible path to the use of PBM for treating cardiovascular diseases via augmenting NO bioavailability. In particular, the use of NIR light in the NIR-II window (1000-1700 nm) for PBM, which has reduced scattering and minimal tissue absorption with the largest penetration depth, is emerging as a promising therapy. In this review, we update recent findings on PBM and NO.
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Affiliation(s)
- Satoshi Kashiwagi
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA.
| | - Atsuyo Morita
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA
| | - Shinya Yokomizo
- Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA; Department of Radiological Science, Tokyo Metropolitan University, 7-2-10 Higashi-Ogu, Arakawa, Tokyo, 116-8551, Japan
| | - Emiyu Ogawa
- School of Allied Health Science, Kitasato University, 1-15-1 Kitasato Minami-ku Sagamihara, Kanagawa, Japan
| | - Eri Komai
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA
| | - Paul L Huang
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA
| | - Denis E Bragin
- Lovelace Biomedical Research Institute, 2425 Ridgecrest Dr. SE, Albuquerque, NM, 87108, USA; Department of Neurology, The University of New Mexico School of Medicine, MSC08 4720, 1 UNM, Albuquerque, NM, 87131, USA.
| | - Dmitriy N Atochin
- Cardiovascular Research Center, Department of Medicine, Massachusetts General Hospital, 149 13th Street, Charlestown, MA, 02129, USA.
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6
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Lundberg JO, Weitzberg E. Nitric oxide signaling in health and disease. Cell 2022; 185:2853-2878. [DOI: 10.1016/j.cell.2022.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/01/2022] [Accepted: 06/06/2022] [Indexed: 10/16/2022]
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7
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Papadopoulos KI, Sutheesophon W, Aw TC. Too hard to die: Exercise training mediates specific and immediate SARS-CoV-2 protection. World J Virol 2022. [PMID: 35433336 DOI: 10.5501/wjv.v11.i2.0000] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/04/2023] Open
Abstract
Several mechanisms may explain how exercise training mechanistically confers protection against coronavirus disease 2019 (COVID-19). Here we propose two new perspectives through which cardiorespiratory fitness may protect against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Physical exercise-activated adenosine monophosphate (AMP)-activated protein kinase (AMPK) signaling induces endothelial nitric oxide (NO) synthase (eNOS), increases NO bio-availability, and inhibits palmitoylation, leading to specific and immediate SARS-CoV-2 protection. AMPK signaling also induces angiotensin 1-7 release and enhances eNOS activation thus further mediating cardio- and reno-protection. Irisin, a myokine released from skeletal muscles during aerobic exercise, also participates in the AMPK/Akt-eNOS/NO pathway, protects mitochondrial functions in endothelial cells, and antagonizes renin angiotensin system proinflammatory action leading to reductions in genes associated with severe COVID-19 outcomes. Collectively, all the above findings point to the fact that increased AMPK and irisin activity through exercise training greatly benefits molecular processes that mediate specific, immediate, and delayed SARS-CoV-2 protection. Maintaining regular physical activity levels is a safe and affordable lifestyle strategy against the current and future pandemics and may also mitigate against obesity and cardiometabolic disease syndemics. Move more because a moving target is harder to kill.
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Affiliation(s)
| | | | - Tar-Choon Aw
- Laboratory Medicine, Changi General Hospital, Singapore 529889, Singapore, Singapore
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8
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Papadopoulos KI, Sutheesophon W, Aw TC. Too hard to die: Exercise training mediates specific and immediate SARS-CoV-2 protection. World J Virol 2022; 11:98-103. [PMID: 35433336 PMCID: PMC8966590 DOI: 10.5501/wjv.v11.i2.98] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 12/19/2021] [Accepted: 02/10/2022] [Indexed: 02/06/2023] Open
Abstract
Several mechanisms may explain how exercise training mechanistically confers protection against coronavirus disease 2019 (COVID-19). Here we propose two new perspectives through which cardiorespiratory fitness may protect against severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Physical exercise-activated adenosine monophosphate (AMP)-activated protein kinase (AMPK) signaling induces endothelial nitric oxide (NO) synthase (eNOS), increases NO bio-availability, and inhibits palmitoylation, leading to specific and immediate SARS-CoV-2 protection. AMPK signaling also induces angiotensin 1-7 release and enhances eNOS activation thus further mediating cardio- and reno-protection. Irisin, a myokine released from skeletal muscles during aerobic exercise, also participates in the AMPK/Akt-eNOS/NO pathway, protects mitochondrial functions in endothelial cells, and antagonizes renin angiotensin system proinflammatory action leading to reductions in genes associated with severe COVID-19 outcomes. Collectively, all the above findings point to the fact that increased AMPK and irisin activity through exercise training greatly benefits molecular processes that mediate specific, immediate, and delayed SARS-CoV-2 protection. Maintaining regular physical activity levels is a safe and affordable lifestyle strategy against the current and future pandemics and may also mitigate against obesity and cardiometabolic disease syndemics. Move more because a moving target is harder to kill.
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Affiliation(s)
| | | | - Tar-Choon Aw
- Laboratory Medicine, Changi General Hospital, Singapore 529889, Singapore, Singapore
- Department of Medicine, National University of Singapore, Singapore 119228, Singapore, Singapore
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9
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Jin YJ, Chennupati R, Li R, Liang G, Wang S, Iring A, Graumann J, Wettschureck N, Offermanns S. Protein kinase N2 mediates flow-induced endothelial NOS activation and vascular tone regulation. J Clin Invest 2021; 131:e145734. [PMID: 34499618 DOI: 10.1172/jci145734] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 09/01/2021] [Indexed: 01/31/2023] Open
Abstract
Formation of NO by endothelial NOS (eNOS) is a central process in the homeostatic regulation of vascular functions including blood pressure regulation, and fluid shear stress exerted by the flowing blood is a main stimulus of eNOS activity. Previous work has identified several mechanosensing and -transducing processes in endothelial cells, which mediate this process and induce the stimulation of eNOS activity through phosphorylation of the enzyme via various kinases including AKT. How the initial mechanosensing and signaling processes are linked to eNOS phosphorylation is unclear. In human endothelial cells, we demonstrated that protein kinase N2 (PKN2), which is activated by flow through the mechanosensitive cation channel Piezo1 and Gq/G11-mediated signaling, as well as by Ca2+ and phosphoinositide-dependent protein kinase 1 (PDK1), plays a pivotal role in this process. Active PKN2 promoted the phosphorylation of human eNOS at serine 1177 and at a newly identified site, serine 1179. These phosphorylation events additively led to increased eNOS activity. PKN2-mediated eNOS phosphorylation at serine 1177 involved the phosphorylation of AKT synergistically with mTORC2-mediated AKT phosphorylation, whereas active PKN2 directly phosphorylated human eNOS at serine 1179. Mice with induced endothelium-specific deficiency of PKN2 showed strongly reduced flow-induced vasodilation and developed arterial hypertension accompanied by reduced eNOS activation. These results uncover a central mechanism that couples upstream mechanosignaling processes in endothelial cells to the regulation of eNOS-mediated NO formation, vascular tone, and blood pressure.
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Affiliation(s)
- Young-June Jin
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Ramesh Chennupati
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Rui Li
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Guozheng Liang
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - ShengPeng Wang
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Cardiovascular Research Center, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Yanta District, Xi'an, China
| | - András Iring
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Laboratory of Molecular Medicine, Institute of Experimental Medicine, Hungarian Academy of Sciences, Budapest, Hungary
| | - Johannes Graumann
- Scientific Service Group Biomolecular Mass Spectrometry, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Nina Wettschureck
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Centre for Molecular Medicine, Medical Faculty, JW Goethe University Frankfurt, Frankfurt, Germany.,Cardiopulmonary Institute (CPI), Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Rhine-Main Site, Frankfurt and Bad Nauheim, Germany
| | - Stefan Offermanns
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Centre for Molecular Medicine, Medical Faculty, JW Goethe University Frankfurt, Frankfurt, Germany.,Cardiopulmonary Institute (CPI), Frankfurt, Germany.,German Center for Cardiovascular Research (DZHK), Rhine-Main Site, Frankfurt and Bad Nauheim, Germany
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10
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Toral M, de la Fuente-Alonso A, Campanero MR, Redondo JM. The NO signalling pathway in aortic aneurysm and dissection. Br J Pharmacol 2021; 179:1287-1303. [PMID: 34599830 DOI: 10.1111/bph.15694] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 09/15/2021] [Accepted: 09/17/2021] [Indexed: 12/20/2022] Open
Abstract
Recent studies have shown that NO is a central mediator in diseases associated with thoracic aortic aneurysm, such as Marfan syndrome. The progressive dilation of the aorta in thoracic aortic aneurysm ultimately leads to aortic dissection. Unfortunately, current medical treatments have neither halt aortic enlargement nor prevented rupture, leaving surgical repair as the only effective treatment. There is therefore a pressing need for effective therapies to delay or even avoid the need for surgical repair in thoracic aortic aneurysm patients. Here, we summarize the mechanisms through which NO signalling dysregulation causes thoracic aortic aneurysm, particularly in Marfan syndrome. We discuss recent advances based on the identification of new Marfan syndrome mediators related to pathway overactivation that represent potential disease biomarkers. Likewise, we propose iNOS, sGC and PRKG1, whose pharmacological inhibition reverses aortopathy in Marfan syndrome mice, as targets for therapeutic intervention in thoracic aortic aneurysm and are candidates for clinical trials.
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Affiliation(s)
- Marta Toral
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Andrea de la Fuente-Alonso
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
| | - Miguel R Campanero
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain.,Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Miguel Redondo
- Gene Regulation in Cardiovascular Remodeling and Inflammation Group, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Madrid, Spain
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11
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Ninchoji T, Love DT, Smith RO, Hedlund M, Vestweber D, Sessa WC, Claesson-Welsh L. eNOS-induced vascular barrier disruption in retinopathy by c-Src activation and tyrosine phosphorylation of VE-cadherin. eLife 2021; 10:e64944. [PMID: 33908348 PMCID: PMC8087444 DOI: 10.7554/elife.64944] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Accepted: 04/22/2021] [Indexed: 12/30/2022] Open
Abstract
Background Hypoxia and consequent production of vascular endothelial growth factor A (VEGFA) promote blood vessel leakiness and edema in ocular diseases. Anti-VEGFA therapeutics may aggravate hypoxia; therefore, therapy development is needed. Methods Oxygen-induced retinopathy was used as a model to test the role of nitric oxide (NO) in pathological neovascularization and vessel permeability. Suppression of NO formation was achieved chemically using L-NMMA, or genetically, in endothelial NO synthase serine to alanine (S1176A) mutant mice. Results Suppression of NO formation resulted in reduced retinal neoangiogenesis. Remaining vascular tufts exhibited reduced vascular leakage through stabilized endothelial adherens junctions, manifested as reduced phosphorylation of vascular endothelial (VE)-cadherin Y685 in a c-Src-dependent manner. Treatment with a single dose of L-NMMA in established retinopathy restored the vascular barrier and prevented leakage. Conclusions We conclude that NO destabilizes adheren junctions, resulting in vascular hyperpermeability, by converging with the VEGFA/VEGFR2/c-Src/VE-cadherin pathway. Funding This study was supported by the Swedish Cancer foundation (19 0119 Pj ), the Swedish Research Council (2020-01349), the Knut and Alice Wallenberg foundation (KAW 2020.0057) and a Fondation Leducq Transatlantic Network of Excellence Grant in Neurovascular Disease (17 CVD 03). KAW also supported LCW with a Wallenberg Scholar grant (2015.0275). WCS was supported by Grants R35 HL139945, P01 HL1070205, AHA MERIT Award. DV was supported by grants from the Deutsche Forschungsgemeinschaft, SFB1450, B03, and CRU342, P2.
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Affiliation(s)
- Takeshi Ninchoji
- Uppsala University, Rudbeck Laboratory, Department of Immunology, Genetics and PathologyUppsalaSweden
| | - Dominic T Love
- Uppsala University, Rudbeck Laboratory, Department of Immunology, Genetics and PathologyUppsalaSweden
| | - Ross O Smith
- Uppsala University, Rudbeck Laboratory, Department of Immunology, Genetics and PathologyUppsalaSweden
| | - Marie Hedlund
- Uppsala University, Rudbeck Laboratory, Department of Immunology, Genetics and PathologyUppsalaSweden
| | | | - William C Sessa
- Yale University School of Medicine, Department of Pharmacology and Vascular Biology and Therapeutics ProgramNew HavenUnited States
| | - Lena Claesson-Welsh
- Uppsala University, Rudbeck Laboratory, Department of Immunology, Genetics and PathologyUppsalaSweden
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12
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Tenopoulou M, Doulias PT. Endothelial nitric oxide synthase-derived nitric oxide in the regulation of metabolism. F1000Res 2020; 9. [PMID: 33042519 PMCID: PMC7531049 DOI: 10.12688/f1000research.19998.1] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/22/2020] [Indexed: 12/13/2022] Open
Abstract
Nitric oxide is an endogenously formed gas that acts as a signaling molecule in the human body. The signaling functions of nitric oxide are accomplished through two primer mechanisms: cGMP-mediated phosphorylation and the formation of S-nitrosocysteine on proteins. This review presents and discusses previous and more recent findings documenting that nitric oxide signaling regulates metabolic activity. These discussions primarily focus on endothelial nitric oxide synthase (eNOS) as the source of nitric oxide.
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Affiliation(s)
- Margarita Tenopoulou
- Children's Hospital of Philadelphia Research Institute, 3517 Civic Center Boulevard, Philadelphia, Pennsylvania, 19104-4318, USA.,Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, 45110, Greece
| | - Paschalis-Thomas Doulias
- Children's Hospital of Philadelphia Research Institute, 3517 Civic Center Boulevard, Philadelphia, Pennsylvania, 19104-4318, USA.,Laboratory of Biochemistry, Department of Chemistry, School of Sciences, University of Ioannina, Ioannina, 45110, Greece
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13
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Li Y, Huang C, Fu W, Zhang H, Lao Y, Zhou H, Tan H, Xu H. Screening of the active fractions from the Coreopsis tinctoria Nutt. Flower on diabetic endothelial protection and determination of the underlying mechanism. JOURNAL OF ETHNOPHARMACOLOGY 2020; 253:112645. [PMID: 32045684 DOI: 10.1016/j.jep.2020.112645] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/06/2020] [Accepted: 02/01/2020] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The Coreopsis tinctoria Nutt. flower (CTF) has been used traditionally in China for treating hypertension and diabetes as well as reducing body weight and blood fat. However, the vascular protection effect of the CTF has not been studied to date. AIM OF THE STUDY This study aimed to screen and identify bioactive fractions from the CTF with a diabetic endothelial protection effect and to clarify the underlying mechanism. MATERIALS AND METHODS The vascular protection effect of Fraction A was studied in high-fat diet and streptozocin-induced diabetic models. The endothelial protection effect of Fraction A-2 was further studied in an in vitro vascular endothelial dysfunction model induced by high glucose. In a high glucose-induced human umbilical vein endothelial cell (HUVEC) model, Fractions A-2-2 and A-2-3 were screened, and their detailed mechanisms of endothelial protection were studied. Liquid chromatography mass spectrometry (LC-MS) was used to identify the main components in Fractions A-2-2 and A-2-3. RESULTS Fraction A treatment significantly improved the endothelium-dependent vasodilation of the mesenteric artery induced by acetylcholine in diabetic rats. The maximum relaxation was 79.82 ± 2.45% in the control group, 64.36 ± 9.81% in the model group, and 91.87 ± 7.38% in the Fraction A treatment group (P < 0.01). Fraction A treatment also decreased rat tail pressure compared with the model group at the 12th week. The systolic blood pressure was 152.7 5 ± 16.99 mmHg in the control group, 188.50 ± 5.94 mmHg in the model group, and 172.60 ± 14.31 mmHg in the Fraction A treatment group (P < 0.05). The mean blood pressure was 128.50 ± 13.79 mmHg in the control group, 157.00 ± 6.06 mmHg in the model group, and 144.80 ± 11.97 mmHg in the Fraction A treatment group (P < 0.05). In an in vitro vascular endothelium-dependent vasodilation dysfunction model induced by high glucose, Fraction A-2 improved the vasodilation of the mesenteric artery. The maximum relaxation was 82.15 ± 16.24% in the control group, 73.29 ± 14.25% in the model group, and 79.62 ± 13.89% in the Fraction A-2 treatment group (P < 0.05). In a high glucose-induced HUVEC model, Fraction A-2-2 and Fraction A-2-3 upregulated the expression of IRS-1, Akt, and eNOS and increased the levels of p-IRS-1Ser307, p-Akt Ser473, and p-eNOSSer1177 and also decreased the expression of NOX4, TNF-α, IL-6, sVCAM, sICAM, and NF-κB (P < 0.01). With the intervention of AG490 and LY294002, the above effects of Fraction A-2-2 and Fraction A-2-3 were inhibited (P < 0.01). LC-MS data showed that in Fraction A-2-2 and Fraction A-2-3, there were 10 main components: flavanocorepsin; polyphenolic; flavanomarein; isochlorogenic acid A; dicaffeoylquinic acid; coreopsin; marein; coreopsin; luteolin-7-O-glucoside; and 3',5,5',7-tetrahydroxyflavanone-O-hexoside. CONCLUSION The protective effect of the CTF on diabetic endothelial dysfunction may be due to its effect on the JAK2/IRS-1/PI3K/Akt/eNOS pathway and the related oxidative stress and inflammation. The results strongly suggested that Fraction A-2-2 and Fraction A-2-3 were the active fractions from the CTF, and the CTF might be a potential option for the prevention of vascular complications in diabetes.
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Affiliation(s)
- Yajuan Li
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Chaoran Huang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Wenwei Fu
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Hong Zhang
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Yuanzhi Lao
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Hua Zhou
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China
| | - Hongsheng Tan
- School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China.
| | - Hongxi Xu
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, PR China.
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14
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Huang W, Hutabarat RP, Chai Z, Zheng T, Zhang W, Li D. Antioxidant Blueberry Anthocyanins Induce Vasodilation via PI3K/Akt Signaling Pathway in High-Glucose-Induced Human Umbilical Vein Endothelial Cells. Int J Mol Sci 2020; 21:E1575. [PMID: 32106617 PMCID: PMC7084611 DOI: 10.3390/ijms21051575] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Revised: 02/17/2020] [Accepted: 02/21/2020] [Indexed: 01/02/2023] Open
Abstract
Blueberries are rich in antioxidant anthocyanins. The hypotensive effects of blueberry anthocyanins in endothelial cells was investigated here. Pretreatment with blueberry anthocyanin extract, malvidin, malvidin-3-glucoside, and malvidin-3-galactoside significantly ameliorated high-glucose-induced damage by enhancing endogenous antioxidant superoxide dismutase (SOD) and heme oxygenase-1 (HO-1), lowering reactive oxygen species (ROS) generation and NADPH oxidase isoform 4 (NOX4) expression, and increasing the cell vitalities. They also effectively induced a vasodilatory effect by increasing the vasodilator nitric oxide (NO) and its promoters endothelial NO synthase (eNOS) and peroxisome proliferator-activated receptor-γ (PPARγ) levels as well as by decreasing the vasoconstrictor angiotensin-converting enzyme (ACE), xanthine oxidase-1 (XO-1), and low-density lipoprotein (LDL) levels. The activation of phosphoinositide 3-kinase (PI3K)/Akt signaling pathway and the breakdown of protein kinase C zeta (PKCζ) pathway were involved in the bioactivities. The results indicated blueberry anthocyanins protected endothelial function against high-glucose (HG) injury via antioxidant and vasodilatory mechanisms, which could be promising molecules as a hypotensive nutraceutical for diabetes patients.
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Affiliation(s)
- Wuyang Huang
- Institute of Agro-Product Processing & Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; (W.H.); (R.P.H.); (Z.C.)
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Ruth Paulina Hutabarat
- Institute of Agro-Product Processing & Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; (W.H.); (R.P.H.); (Z.C.)
- Department of Food Science and Nutrition, Jinling College, Nanjing Normal University, Nanjing 210097, China;
| | - Zhi Chai
- Institute of Agro-Product Processing & Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; (W.H.); (R.P.H.); (Z.C.)
| | - Tiesong Zheng
- Department of Food Science and Nutrition, Jinling College, Nanjing Normal University, Nanjing 210097, China;
| | - Weimin Zhang
- College of Food Science, Hainan University, Hainan 570228, China
| | - Dajing Li
- Institute of Agro-Product Processing & Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; (W.H.); (R.P.H.); (Z.C.)
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15
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Xu J, Yang Q, Zhang X, Liu Z, Cao Y, Wang L, Zhou Y, Zeng X, Ma Q, Xu Y, Wang Y, Huang L, Han Z, Wang T, Stepp D, Bagi Z, Wu C, Hong M, Huo Y. Endothelial adenosine kinase deficiency ameliorates diet-induced insulin resistance. J Endocrinol 2019; 242:159-172. [PMID: 31189131 PMCID: PMC6885115 DOI: 10.1530/joe-19-0126] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Accepted: 06/12/2019] [Indexed: 01/01/2023]
Abstract
Insulin resistance-related disorders are associated with endothelial dysfunction. Accumulating evidence has suggested a role for adenosine signaling in the regulation of endothelial function. Here, we identified a crucial role of endothelial adenosine kinase (ADK) in the regulation of insulin resistance. Feeding mice with a high-fat diet (HFD) markedly enhanced the expression of endothelial Adk. Ablation of endothelial Adk in HFD-fed mice improved glucose tolerance and insulin sensitivity and decreased hepatic steatosis, adipose inflammation and adiposity, which were associated with improved arteriole vasodilation, decreased inflammation and increased adipose angiogenesis. Mechanistically, ADK inhibition or knockdown in human umbilical vein endothelial cells (HUVECs) elevated intracellular adenosine level and increased endothelial nitric oxide synthase (NOS3) activity, resulting in an increase in nitric oxide (NO) production. Antagonism of adenosine receptor A2b abolished ADK-knockdown-enhanced NOS3 expression in HUVECs. Additionally, increased phosphorylation of NOS3 in ADK-knockdown HUVECs was regulated by an adenosine receptor-independent mechanism. These data suggest that Adk-deficiency-elevated intracellular adenosine in endothelial cells ameliorates diet-induced insulin resistance and metabolic disorders, and this is associated with an enhancement of NO production caused by increased NOS3 expression and activation. Therefore, ADK is a potential target for the prevention and treatment of metabolic disorders associated with insulin resistance.
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Affiliation(s)
- Jiean Xu
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Qiuhua Yang
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Xiaoyu Zhang
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Zhiping Liu
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Yapeng Cao
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Lina Wang
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Yaqi Zhou
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Xianqiu Zeng
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Qian Ma
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Yiming Xu
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou 511436, China
| | - Yong Wang
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu 610075, China
| | - Lei Huang
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Zhen Han
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - Tao Wang
- Department of Cardiovascular Surgery, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - David Stepp
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Zsolt Bagi
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
| | - Chaodong Wu
- Department of Nutrition and Food Science, Texas A&M University, College Station, TX 77840, USA
| | - Mei Hong
- Drug Discovery Center, State Key Laboratory of Chemical Oncogenomics, Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yuqing Huo
- Vascular Biology Center, Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta University, Augusta, GA 30912, USA
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16
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Sellers SL, Milad N, Chan R, Mielnik M, Jermilova U, Huang PL, de Crom R, Hirota JA, Hogg JC, Sandor GG, Van Breemen C, Esfandiarei M, Seidman MA, Bernatchez P. Inhibition of Marfan Syndrome Aortic Root Dilation by Losartan: Role of Angiotensin II Receptor Type 1-Independent Activation of Endothelial Function. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 188:574-585. [PMID: 29433732 DOI: 10.1016/j.ajpath.2017.11.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 10/18/2017] [Accepted: 11/16/2017] [Indexed: 01/13/2023]
Abstract
Marfan syndrome (MFS) is a genetic disorder that frequently leads to aortic root dissection and aneurysm. Despite promising preclinical and pilot clinical data, a recent large-scale study using antihypertensive angiotensin II (AngII) receptor type 1 (ATR1) blocker losartan has failed to meet expectations at preventing MFS-associated aortic root dilation, casting doubts about optimal therapy. To study the deleterious role of normal ATR1 signaling in aortic root widening, we generated MFS mice lacking ATR1a expression in an attempt to preserve protective ATR2 signaling. Despite being hypotensive and resistant to AngII vasopressor effects, MFS/ATR1a-null mice showed unabated aortic root enlargement and remained fully responsive to losartan, confirming that blood pressure lowering is of minor therapeutic value in MFS and that losartan's antiremodeling properties may be ATR1 independent. Having shown that MFS causes endothelial dysfunction and that losartan can activate endothelial function in mice and patients, we found that nitric oxide synthase (NOS) inhibition renders losartan therapeutically inactive, whereas multiple transgenic and pharmacologic models of endothelial NOS activation block aortic root dilation by correcting extracellular signal-regulated kinase signaling. In vitro, losartan can increase endothelial NO release in the absence of AngII and correct MFS NO levels in vivo. Our data suggest that increased protective endothelial function, rather than ATR1 inhibition or blood pressure lowering, might be of therapeutic significance in preventing aortic root disease in MFS.
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Affiliation(s)
- Stephanie L Sellers
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Nadia Milad
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Rayleigh Chan
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Michael Mielnik
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Una Jermilova
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Paul L Huang
- Cardiovascular Research Centre, Massachusetts General Hospital, Harvard University, Charlestown, Massachusetts
| | - Rini de Crom
- Department of Cell Biology and Genetics, Erasmus University Medical Center, Rotterdam, the Netherlands
| | - Jeremy A Hirota
- UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada; Division of Respiratory Medicine, Department of Medicine, Chan-Yeung Centre for Occupational and Environmental Respiratory Disease, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - James C Hogg
- UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - George G Sandor
- Providence Health Care, and the Child and Family Research Institute, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Casey Van Breemen
- Providence Health Care, and the Child and Family Research Institute, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Mitra Esfandiarei
- Department of Biomedical Sciences, Midwestern University, Glendale, Arizona
| | - Michael A Seidman
- UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia (UBC), Vancouver, British Columbia, Canada
| | - Pascal Bernatchez
- Department of Anesthesiology, Pharmacology and Therapeutics, University of British Columbia (UBC), Vancouver, British Columbia, Canada; UBC Centre for Heart Lung Innovation and St. Paul's Hospital, University of British Columbia (UBC), Vancouver, British Columbia, Canada.
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17
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Garcia V, Sessa WC. Endothelial NOS: perspective and recent developments. Br J Pharmacol 2019; 176:189-196. [PMID: 30341769 PMCID: PMC6295413 DOI: 10.1111/bph.14522] [Citation(s) in RCA: 107] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 10/04/2018] [Indexed: 02/06/2023] Open
Abstract
Endothelial NOS (eNOS), and its product NO, are vital components of the control of vasomotor function and cardiovascular homeostasis. In the present review, we will take a deep dive into eNOS enzymology, function and mechanisms regulating endothelial NO. The mechanisms regulating eNOS and NO synthesis discussed here include alterations to transcriptional, post-translational modifications and protein-protein regulations. Also, we will discuss the phenotypes associated with various eNOS mutants and the consequences of a disrupted eNOS/NO cascade, highlighting the importance of eNOS function and vascular homeostasis. LINKED ARTICLES: This article is part of a themed section on Nitric Oxide 20 Years from the 1998 Nobel Prize. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v176.2/issuetoc.
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Affiliation(s)
- Victor Garcia
- Vascular Biology and Therapeutics Program, Department of PharmacologyYale University School of MedicineNew HavenCTUSA
| | - William C Sessa
- Vascular Biology and Therapeutics Program, Department of PharmacologyYale University School of MedicineNew HavenCTUSA
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18
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Tenopoulou M, Doulias PT, Nakamoto K, Berrios K, Zura G, Li C, Faust M, Yakovishina V, Evans P, Tan L, Bennett MJ, Snyder NW, Quinn WJ, Baur JA, Atochin DN, Huang PL, Ischiropoulos H. Oral nitrite restores age-dependent phenotypes in eNOS-null mice. JCI Insight 2018; 3:122156. [PMID: 30135317 DOI: 10.1172/jci.insight.122156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/11/2018] [Indexed: 01/01/2023] Open
Abstract
Alterations in the synthesis and bioavailability of NO are central to the pathogenesis of cardiovascular and metabolic disorders. Although endothelial NO synthase-derived (eNOS-derived) NO affects mitochondrial long-chain fatty acid β-oxidation, the pathophysiological significance of this regulation remains unclear. Accordingly, we determined the contributions of eNOS/NO signaling in the adaptive metabolic responses to fasting and in age-induced metabolic dysfunction. Four-month-old eNOS-/- mice are glucose intolerant and exhibit serum dyslipidemia and decreased capacity to oxidize fatty acids. However, during fasting, eNOS-/- mice redirect acetyl-CoA to ketogenesis to elevate circulating levels of β-hydroxybutyrate similar to wild-type mice. Treatment of 4-month-old eNOS-/- mice with nitrite for 10 days corrected the hypertension and serum hyperlipidemia and normalized the rate of fatty acid oxidation. Fourteen-month-old eNOS-/- mice exhibited metabolic derangements, resulting in reduced utilization of fat to generate energy, lower resting metabolic activity, and diminished physical activity. Seven-month administration of nitrite to eNOS-/- mice reversed the age-dependent metabolic derangements and restored physical activity. While the eNOS/NO signaling is not essential for the metabolic adaptation to fasting, it is critical for regulating systemic metabolic homeostasis in aging. The development of age-dependent metabolic disorder is prevented by low-dose replenishment of bioactive NO.
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Affiliation(s)
- Margarita Tenopoulou
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | | | - Kent Nakamoto
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Kiara Berrios
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Gabriella Zura
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Chenxi Li
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Michael Faust
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Veronika Yakovishina
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Perry Evans
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Lu Tan
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Michael J Bennett
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
| | - Nathaniel W Snyder
- A.J. Drexel Autism Institute, Drexel University, Philadelphia, Pennsylvania, USA
| | - William J Quinn
- Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Joseph A Baur
- Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Dmitriy N Atochin
- Cardiovascular Research Center Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Paul L Huang
- Cardiovascular Research Center Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Harry Ischiropoulos
- Children's Hospital of Philadelphia Research Institute, Philadelphia, Pennsylvania, USA
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19
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Reed LC, Estrada SM, Walton RB, Napolitano PG, Ieronimakis N. Evaluating maternal hyperglycemic exposure and fetal placental arterial dysfunction in a dual cotyledon, dual perfusion model. Placenta 2018; 69:109-116. [PMID: 30213479 DOI: 10.1016/j.placenta.2018.07.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 07/11/2018] [Accepted: 07/27/2018] [Indexed: 01/17/2023]
Abstract
BACKGROUND Gestational diabetes affects almost 1 in 10 pregnancies and is associated with adverse outcomes including fetal demise. Pregnancy complications related to diabetes are attributed to placental vascular dysfunction. With diabetes, maternal hyperglycemia is thought to promote placental vasoconstriction. However, it remains poorly understood if and how hyperglycemia leads to placental vascular dysfunction or if humoral factors related to maternal diabetes are responsible. METHODS AND RESULTS Utilizing a human placenta dual cotyledon, dual perfusion assay we examined the arterial pressure response to the thromboxane mimetic U44619, in cotyledons exposed to normal vs. a hyperglycemic infusion into the intervillous space. Tissues were then analyzed for the activity of key signaling molecules related to vascular tone; eNOS, Akt, PKA and VEGFR2. Results indicate a significant increase in fetal vascular resistance with maternal exposure to hyperglycemia. This response corresponded with a reduction in the phosphorylation of eNOS at Ser1177 and Akt at Thr308. In contrast, VEGFR2 at Tyr1175 and PKA at Thr197 were not different with hyperglycemia. CONCLUSION Reductions of eNOS and Akt phosphorylation at key residues implicated in nitric oxide production suggest that hyperglycemia alters the vasodilatory signaling of placental vessels. In contrast, acute hyperglycemic exposure may not alter vasoconstriction via VEGF and PKA signaling. Altogether our results link hyperglycemic exposure in human placentas to nitric oxide signaling; a mechanisms that may account for the elevations in vascular resistance commonly observed in diabetic pregnancies.
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Affiliation(s)
- Luckey C Reed
- Department of Obstetrics and Gynecology, Madigan Army Medical Center, Tacoma, WA, USA
| | - Sarah M Estrada
- Department of Obstetrics and Gynecology, Madigan Army Medical Center, Tacoma, WA, USA
| | - Robert B Walton
- Department of Obstetrics and Gynecology, Madigan Army Medical Center, Tacoma, WA, USA
| | - Peter G Napolitano
- Department of Obstetrics and Gynecology, Madigan Army Medical Center, Tacoma, WA, USA
| | - Nicholas Ieronimakis
- Department of Clinical Investigation, Madigan Army Medical Center, Tacoma, WA, USA.
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The Contribution of Singlet Oxygen to Insulin Resistance. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:8765972. [PMID: 29081894 PMCID: PMC5610878 DOI: 10.1155/2017/8765972] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 08/07/2017] [Indexed: 12/21/2022]
Abstract
Insulin resistance contributes to the development of diabetes and cardiovascular dysfunctions. Recent studies showed that elevated singlet oxygen-mediated lipid peroxidation precedes and predicts diet-induced insulin resistance (IR), and neutrophils were suggested to be responsible for such singlet oxygen production. This review highlights literature suggesting that insulin-responsive cells such as endothelial cells, hepatocytes, adipocytes, and myocytes also produce singlet oxygen, which contributes to insulin resistance, for example, by generating bioactive aldehydes, inducing endoplasmic reticulum (ER) stress, and modifying mitochondrial DNA. In these cells, nutrient overload leads to the activation of Toll-like receptor 4 and other receptors, leading to the production of both peroxynitrite and hydrogen peroxide, which react to produce singlet oxygen. Cytochrome P450 2E1 and cytochrome c also contribute to singlet oxygen formation in the ER and mitochondria, respectively. Endothelial cell-derived singlet oxygen is suggested to mediate the formation of oxidized low-density lipoprotein which perpetuates IR, partly through neutrophil recruitment to adipose tissue. New singlet oxygen-involving pathways for the formation of IR-inducing bioactive aldehydes such as 4-hydroperoxy-(or hydroxy or oxo)-2-nonenal, malondialdehyde, and cholesterol secosterol A are proposed. Strategies against IR should target the singlet oxygen-producing pathways, singlet oxygen quenching, and singlet oxygen-induced cellular responses.
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Atochin D, Litvak M, Huang S, Kim YR, Huang P. Role of eNOS in water exchange index maintenance-MRI studies. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/886/1/012002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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Jankovic A, Korac A, Buzadzic B, Stancic A, Otasevic V, Ferdinandy P, Daiber A, Korac B. Targeting the NO/superoxide ratio in adipose tissue: relevance to obesity and diabetes management. Br J Pharmacol 2017; 174:1570-1590. [PMID: 27079449 PMCID: PMC5446578 DOI: 10.1111/bph.13498] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2016] [Revised: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 12/21/2022] Open
Abstract
Insulin sensitivity and metabolic homeostasis depend on the capacity of adipose tissue to take up and utilize excess glucose and fatty acids. The key aspects that determine the fuel-buffering capacity of adipose tissue depend on the physiological levels of the small redox molecule, nitric oxide (NO). In addition to impairment of NO synthesis, excessive formation of the superoxide anion (О2•- ) in adipose tissue may be an important interfering factor diverting the signalling of NO and other reactive oxygen and nitrogen species in obesity, resulting in metabolic dysfunction of adipose tissue over time. Besides its role in relief from superoxide burst, enhanced NO signalling may be responsible for the therapeutic benefits of different superoxide dismutase mimetics, in obesity and experimental diabetes models. This review summarizes the role of NO in adipose tissue and highlights the effects of NO/О2•- ratio 'teetering' as a promising pharmacological target in the metabolic syndrome. LINKED ARTICLES This article is part of a themed section on Redox Biology and Oxidative Stress in Health and Disease. To view the other articles in this section visit http://onlinelibrary.wiley.com/doi/10.1111/bph.v174.12/issuetoc.
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Affiliation(s)
- Aleksandra Jankovic
- Department of Physiology, Institute for Biological Research “Sinisa Stankovic”University of BelgradeBelgradeSerbia
| | - Aleksandra Korac
- Faculty of Biology, Center for Electron MicroscopyUniversity of BelgradeBelgradeSerbia
| | - Biljana Buzadzic
- Department of Physiology, Institute for Biological Research “Sinisa Stankovic”University of BelgradeBelgradeSerbia
| | - Ana Stancic
- Department of Physiology, Institute for Biological Research “Sinisa Stankovic”University of BelgradeBelgradeSerbia
| | - Vesna Otasevic
- Department of Physiology, Institute for Biological Research “Sinisa Stankovic”University of BelgradeBelgradeSerbia
| | - Péter Ferdinandy
- Department of Pharmacology and PharmacotherapySemmelweis UniversityBudapestHungary
- Pharmahungary GroupSzegedHungary
| | - Andreas Daiber
- Center for Cardiology ‐ Cardiology 1, Molecular CardiologyUniversity Medical CenterMainzGermany
| | - Bato Korac
- Department of Physiology, Institute for Biological Research “Sinisa Stankovic”University of BelgradeBelgradeSerbia
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Forte M, Conti V, Damato A, Ambrosio M, Puca AA, Sciarretta S, Frati G, Vecchione C, Carrizzo A. Targeting Nitric Oxide with Natural Derived Compounds as a Therapeutic Strategy in Vascular Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:7364138. [PMID: 27651855 PMCID: PMC5019908 DOI: 10.1155/2016/7364138] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 07/30/2016] [Accepted: 08/01/2016] [Indexed: 12/20/2022]
Abstract
Within the family of endogenous gasotransmitters, nitric oxide (NO) is the smallest gaseous intercellular messenger involved in the modulation of several processes, such as blood flow and platelet aggregation control, essential to maintain vascular homeostasis. NO is produced by nitric oxide synthases (NOS) and its effects are mediated by cGMP-dependent or cGMP-independent mechanisms. Growing evidence suggests a crosstalk between the NO signaling and the occurrence of oxidative stress in the onset and progression of vascular diseases, such as hypertension, heart failure, ischemia, and stroke. For these reasons, NO is considered as an emerging molecular target for developing therapeutic strategies for cardio- and cerebrovascular pathologies. Several natural derived compounds, such as polyphenols, are now proposed as modulators of NO-mediated pathways. The aim of this review is to highlight the experimental evidence on the involvement of nitric oxide in vascular homeostasis focusing on the therapeutic potential of targeting NO with some natural compounds in patients with vascular diseases.
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Affiliation(s)
- Maurizio Forte
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
| | - Valeria Conti
- Università degli Studi di Salerno, Medicine, Surgery and Dentistry, Baronissi, Italy
| | - Antonio Damato
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
| | | | - Annibale A. Puca
- Università degli Studi di Salerno, Medicine, Surgery and Dentistry, Baronissi, Italy
- IRCCS Multimedica, Milan, Italy
| | - Sebastiano Sciarretta
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy
| | - Giacomo Frati
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
- Department of Medico-Surgical Sciences and Biotechnologies, Sapienza University of Rome, Rome, Italy
| | - Carmine Vecchione
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
- Università degli Studi di Salerno, Medicine, Surgery and Dentistry, Baronissi, Italy
| | - Albino Carrizzo
- IRCCS Neuromed, Vascular Physiopathology Unit, Pozzilli, Italy
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Park K, Mima A, Li Q, Rask-Madsen C, He P, Mizutani K, Katagiri S, Maeda Y, Wu IH, Khamaisi M, Preil SR, Maddaloni E, Sørensen D, Rasmussen LM, Huang PL, King GL. Insulin decreases atherosclerosis by inducing endothelin receptor B expression. JCI Insight 2016; 1:e86574. [PMID: 27200419 PMCID: PMC4869734 DOI: 10.1172/jci.insight.86574] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Endothelial cell (EC) insulin resistance and dysfunction, caused by diabetes, accelerates atherosclerosis. It is unknown whether specifically enhancing EC-targeted insulin action can decrease atherosclerosis in diabetes. Accordingly, overexpressing insulin receptor substrate-1 (IRS1) in the endothelia of Apoe-/- mice (Irs1/Apoe-/-) increased insulin signaling and function in the aorta. Atherosclerosis was significantly reduced in Irs1/ApoE-/- mice on diet-induced hyperinsulinemia and hyperglycemia. The mechanism of insulin's enhanced antiatherogenic actions in EC was related to remarkable induction of NO action, which increases endothelin receptor B (EDNRB) expression and intracellular [Ca2+]. Using the mice with knockin mutation of eNOS, which had Ser1176 mutated to alanine (AKI), deleting the only known mechanism for insulin to activate eNOS/NO pathway, we observed that IRS1 overexpression in the endothelia of Aki/ApoE-/- mice significantly decreased atherosclerosis. Interestingly, endothelial EDNRB expression was selectively reduced in intima of arteries from diabetic patients and rodents. However, endothelial EDNRB expression was upregulated by insulin via P13K/Akt pathway. Finally EDNRB deletion in EC of Ldlr-/- and Irs1/Ldlr-/- mice decreased NO production and accelerated atherosclerosis, compared with Ldlr-/- mice. Accelerated atherosclerosis in diabetes may be reduced by improving insulin signaling selectively via IRS1/Akt in the EC by inducing EDNRB expression and NO production.
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Affiliation(s)
- Kyoungmin Park
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Akira Mima
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Qian Li
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Christian Rask-Madsen
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Pingnian He
- Department of Cellular and Molecular Physiology, Penn State Hershey College of Medicine, Hershey, Pennsylvania, USA
| | - Koji Mizutani
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Sayaka Katagiri
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Yasutaka Maeda
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - I-Hsien Wu
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Mogher Khamaisi
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Simone Rordam Preil
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, University of Southern Denmark, Odense, Denmark
| | - Ernesto Maddaloni
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - Ditte Sørensen
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, University of Southern Denmark, Odense, Denmark
- Danish Diabetes Academy, Odense, Denmark
| | - Lars Melholt Rasmussen
- Department of Clinical Biochemistry and Pharmacology, Odense University Hospital, University of Southern Denmark, Odense, Denmark
| | - Paul L. Huang
- Cardiovascular Research Center, Cardiology Division, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, USA
| | - George L. King
- Dianne Nunnally Hoppes Laboratory Section of Vascular Cell Biology, Joslin Diabetes Center, Harvard Medical School, Boston, Massachusetts, USA
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25
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Karki S, Farb MG, Ngo DTM, Myers S, Puri V, Hamburg NM, Carmine B, Hess DT, Gokce N. Forkhead box O-1 modulation improves endothelial insulin resistance in human obesity. Arterioscler Thromb Vasc Biol 2015; 35:1498-506. [PMID: 25908760 DOI: 10.1161/atvbaha.114.305139] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 04/14/2015] [Indexed: 01/13/2023]
Abstract
OBJECTIVE Increased visceral adiposity has been closely linked to insulin resistance, endothelial dysfunction, and cardiometabolic disease in obesity, but pathophysiological mechanisms are poorly understood. We sought to investigate mechanisms of vascular insulin resistance by characterizing depot-specific insulin responses and gain evidence that altered functionality of transcription factor forkhead box O-1 (FOXO-1) may play an important role in obesity-related endothelial dysfunction. APPROACH AND RESULTS We intraoperatively collected paired subcutaneous and visceral adipose tissue samples from 56 severely obese (body mass index, 43 ± 7 kg/m(2)) and 14 nonobese subjects during planned surgical operations, and characterized depot-specific insulin-mediated responses using Western blot and quantitative immunofluorescence techniques. Insulin signaling via phosphorylation of FOXO-1 and consequent endothelial nitric oxide synthase stimulation was selectively impaired in the visceral compared with subcutaneous adipose tissue and endothelial cells of obese subjects. In contrast, tissue actions of insulin were preserved in nonobese individuals. Pharmacological antagonism with AS1842856 and biological silencing using small interfering RNA-mediated FOXO-1 knockdown reversed insulin resistance and restored endothelial nitric oxide synthase activation in the obese. CONCLUSIONS We observed profound endothelial insulin resistance in the visceral adipose tissue of obese humans which improved with FOXO-1 inhibition. FOXO-1 modulation may represent a novel therapeutic target to diminish vascular insulin resistance. In addition, characterization of endothelial insulin resistance in the adipose microenvironment may provide clues to mechanisms of systemic disease in human obesity.
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Affiliation(s)
- Shakun Karki
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Melissa G Farb
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Doan T M Ngo
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Samantha Myers
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Vishwajeet Puri
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Naomi M Hamburg
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Brian Carmine
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Donald T Hess
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA
| | - Noyan Gokce
- From the Evans Department of Medicine and Whitaker Cardiovascular Institute (S.K., M.G.F., D.T.M.N., S.M., V.P., N.M.H., N.G.) and Department of General Surgery (B.C., D.T.H.), Boston University School of Medicine, MA.
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26
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Abstract
After many years of research, obesity is still a disease with an unmet medical need. Very few compounds have been approved, acting mainly on neuromediators; researches, in recent years, pointed toward compounds potentially safer than first-generation antiobesity drugs, able to interact with one or more (multitarget therapy) receptors for substances produced by the gut, adipose tissue and other targets outside CNS. Other holistic approaches, such as those involving gut microbiota and plant extracts, appeared recently in the literature, and undoubtedly will contribute to the discovery of a valuable therapy for this disease. This review deals with the positive results and the pitfalls obtained following these approaches, with a view on their clinical trial studies.
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27
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Valerio A, Nisoli E. Nitric oxide, interorganelle communication, and energy flow: a novel route to slow aging. Front Cell Dev Biol 2015; 3:6. [PMID: 25705617 PMCID: PMC4319459 DOI: 10.3389/fcell.2015.00006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2014] [Accepted: 01/12/2015] [Indexed: 12/14/2022] Open
Abstract
The mitochondrial lifecycle (mitochondrial biogenesis, dynamics, and removal by mitophagy) is carefully orchestrated to ensure the efficient generation of cellular energy and to maintain reactive oxygen species (ROS) production within an optimal range for cellular health. Based on latest research, these processes largely depend on mitochondrial interactions with other cell organelles, so that the ER- and peroxisome-mitochondrial connections might intervene in the control of cellular energy flow. Damaged organelles are cleared by autophagic mechanisms to assure the quality and proper function of the intracellular organelle pool. Nitric oxide (NO) generated through the endothelial nitric oxide synthase (eNOS) acts a gas signaling mediator to promote mitochondrial biogenesis and bioenergetics, with a favorable impact in diverse chronic diseases of the elderly. Obesity, diabetes and aging share common pathophysiological mechanisms, including mitochondrial impairment and dysfunctional eNOS. Here we review the evidences that eNOS-dependent mitochondrial biogenesis and quality control, and possibly the complex interplay among cellular organelles, may be affected by metabolic diseases and the aging processes, contributing to reduce healthspan and lifespan. Drugs or nutrients able to sustain the eNOS-NO generating system might contribute to maintain organelle homeostasis and represent novel preventive and/or therapeutic approaches to chronic age-related diseases.
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Affiliation(s)
- Alessandra Valerio
- Department of Molecular and Translational Medicine, University of Brescia Brescia, Italy
| | - Enzo Nisoli
- Department of Medical Biotechnology and Translational Medicine, Center for Study and Research on Obesity, University of Milan Milan, Italy
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28
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Sansbury BE, Bhatnagar A, Hill BG. Impact of nutrient excess and endothelial nitric oxide synthase on the plasma metabolite profile in mice. Front Physiol 2014; 5:453. [PMID: 25505420 PMCID: PMC4243488 DOI: 10.3389/fphys.2014.00453] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 11/03/2014] [Indexed: 01/08/2023] Open
Abstract
An increase in calorie consumption is associated with the recent rise in obesity prevalence. However, our current understanding of the effects of nutrient excess on major metabolic pathways appears insufficient to develop safe and effective metabolic interventions to prevent obesity. Hence, we sought to identify systemic metabolic changes caused by nutrient excess and to determine how endothelial nitric oxide synthase (eNOS)—which has anti-obesogenic properties—affects systemic metabolism by measuring plasma metabolites. Wild-type (WT) and eNOS transgenic (eNOS-TG) mice were placed on low fat or high fat diets for 6 weeks, and plasma metabolites were measured using an unbiased metabolomic approach. High fat feeding in WT mice led to significant increases in fat mass, which was associated with significantly lower plasma levels of 1,5-anhydroglucitol, lysophospholipids, 3-dehydrocarnitine, and bile acids, as well as branched chain amino acids (BCAAs) and their metabolites. Plasma levels of several lipids including sphingomyelins, stearoylcarnitine, dihomo-linoleate and metabolites associated with oxidative stress were increased by high fat diet. In comparison with low fat-fed WT mice, eNOS-TG mice showed lower levels of several free fatty acids, but in contrast, the levels of bile acids, amino acids, and BCAA catabolites were increased. When placed on a high fat diet, eNOS overexpressing mice showed remarkably higher levels of plasma bile acids and elevated levels of plasma BCAAs and their catabolites compared with WT mice. Treatment with GW4064, an inhibitor of bile acid synthesis, decreased plasma bile acid levels but was not sufficient to reverse the anti-obesogenic effects of eNOS overexpression. These findings reveal unique metabolic changes in response to high fat diet and eNOS overexpression and suggest that the anti-obesity effects of eNOS are likely independent of changes in the bile acid pool.
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Affiliation(s)
- Brian E Sansbury
- Division of Cardiology, Department of Medicine, Institute of Molecular Cardiology, University of Louisville Louisville, KY, USA ; Department of Medicine, Diabetes and Obesity Center, University of Louisville Louisville, KY, USA ; Department of Physiology and Biophysics, University of Louisville Louisville, KY, USA
| | - Aruni Bhatnagar
- Division of Cardiology, Department of Medicine, Institute of Molecular Cardiology, University of Louisville Louisville, KY, USA ; Department of Medicine, Diabetes and Obesity Center, University of Louisville Louisville, KY, USA ; Department of Physiology and Biophysics, University of Louisville Louisville, KY, USA ; Department of Biochemistry and Molecular Biology, University of Louisville Louisville, KY, USA
| | - Bradford G Hill
- Division of Cardiology, Department of Medicine, Institute of Molecular Cardiology, University of Louisville Louisville, KY, USA ; Department of Medicine, Diabetes and Obesity Center, University of Louisville Louisville, KY, USA ; Department of Physiology and Biophysics, University of Louisville Louisville, KY, USA ; Department of Biochemistry and Molecular Biology, University of Louisville Louisville, KY, USA
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29
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Ramseyer VD, Gonzalez-Vicente A, Carretero OA, Garvin JL. Angiotensin II-induced hypertension blunts thick ascending limb NO production by reducing NO synthase 3 expression and enhancing threonine 495 phosphorylation. Am J Physiol Renal Physiol 2014; 308:F149-56. [PMID: 25377910 DOI: 10.1152/ajprenal.00279.2014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Thick ascending limbs reabsorb 30% of the filtered NaCl load. Nitric oxide (NO) produced by NO synthase 3 (NOS3) inhibits NaCl transport by this segment. In contrast, chronic angiotensin II (ANG II) infusion increases net thick ascending limb transport. NOS3 activity is regulated by changes in expression and phosphorylation at threonine 495 (T495) and serine 1177 (S1177), inhibitory and stimulatory sites, respectively. We hypothesized that NO production by thick ascending limbs is impaired by chronic ANG II infusion, due to reduced NOS3 expression, increased phosphorylation of T495, and decreased phosphorylation of S1177. Rats were infused with 200 ng·kg(-1)·min(-1) ANG II or vehicle for 1 and 5 days. ANG II infusion for 5 days decreased NOS3 expression by 40 ± 12% (P < 0.007; n = 6) and increased T495 phosphorylation by 147 ± 26% (P < 0.008; n = 6). One-day ANG II infusion had no significant effect. NO production in response to endothelin-1 was blunted in thick ascending limbs from ANG II-infused animals [ANG II -0.01 ± 0.06 arbitrary fluorescence units (AFU)/min vs. 0.17 ± 0.02 AFU/min in controls; P < 0.01]. This was not due to reduced endothelin-1 receptor expression. Phosphatidylinositol 3,4,5-triphosphate (PIP3)-induced NO production was also reduced in ANG II-infused rats (ANG II -0.07 ± 0.06 vs. 0.13 ± 0.04 AFU/min in controls; P < 0.03), and this correlated with an impaired ability of PIP3 to increase S1177 phosphorylation. We conclude that in ANG II-induced hypertension NO production by thick ascending limbs is impaired due to decreased NOS3 expression and altered phosphorylation.
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Affiliation(s)
- Vanesa D Ramseyer
- Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan; Center for Molecular Medicine and Genetics, School of Medicine, Wayne State University, Detroit, Michigan
| | - Agustin Gonzalez-Vicente
- Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio; and Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Ciudad Autónoma de Buenos Aires, Argentina
| | - Oscar A Carretero
- Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan
| | - Jeffrey L Garvin
- Hypertension and Vascular Research, Department of Internal Medicine, Henry Ford Hospital, Detroit, Michigan; Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, Ohio; and
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30
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Shao Y, Cheng Z, Li X, Chernaya V, Wang H, Yang XF. Immunosuppressive/anti-inflammatory cytokines directly and indirectly inhibit endothelial dysfunction--a novel mechanism for maintaining vascular function. J Hematol Oncol 2014; 7:80. [PMID: 25387998 PMCID: PMC4236671 DOI: 10.1186/s13045-014-0080-6] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 10/13/2014] [Indexed: 12/14/2022] Open
Abstract
Endothelial dysfunction is a pathological status of the vascular system, which can be broadly defined as an imbalance between endothelium-dependent vasoconstriction and vasodilation. Endothelial dysfunction is a key event in the progression of many pathological processes including atherosclerosis, type II diabetes and hypertension. Previous reports have demonstrated that pro-inflammatory/immunoeffector cytokines significantly promote endothelial dysfunction while numerous novel anti-inflammatory/immunosuppressive cytokines have recently been identified such as interleukin (IL)-35. However, the effects of anti-inflammatory cytokines on endothelial dysfunction have received much less attention. In this analytical review, we focus on the recent progress attained in characterizing the direct and indirect effects of anti-inflammatory/immunosuppressive cytokines in the inhibition of endothelial dysfunction. Our analyses are not only limited to the importance of endothelial dysfunction in cardiovascular disease progression, but also expand into the molecular mechanisms and pathways underlying the inhibition of endothelial dysfunction by anti-inflammatory/immunosuppressive cytokines. Our review suggests that anti-inflammatory/immunosuppressive cytokines serve as novel therapeutic targets for inhibiting endothelial dysfunction, vascular inflammation and cardio- and cerebro-vascular diseases.
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Affiliation(s)
- Ying Shao
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Zhongjian Cheng
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Xinyuan Li
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Valeria Chernaya
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Hong Wang
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA.
| | - Xiao-feng Yang
- Department of Pharmacology, Center for Metabolic Disease Research and Cardiovascular Research Center, Temple University School of Medicine, MERB 1059, 3500 North Broad Street, Philadelphia, PA, 19140, USA. .,Department of Microbiology and Immunology, Temple University School of Medicine, Philadelphia, PA, 19140, USA.
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31
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Sansbury BE, Hill BG. Regulation of obesity and insulin resistance by nitric oxide. Free Radic Biol Med 2014; 73:383-99. [PMID: 24878261 PMCID: PMC4112002 DOI: 10.1016/j.freeradbiomed.2014.05.016] [Citation(s) in RCA: 172] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 05/16/2014] [Accepted: 05/17/2014] [Indexed: 02/07/2023]
Abstract
Obesity is a risk factor for developing type 2 diabetes and cardiovascular disease and has quickly become a worldwide pandemic with few tangible and safe treatment options. Although it is generally accepted that the primary cause of obesity is energy imbalance, i.e., the calories consumed are greater than are utilized, understanding how caloric balance is regulated has proven a challenge. Many "distal" causes of obesity, such as the structural environment, occupation, and social influences, are exceedingly difficult to change or manipulate. Hence, molecular processes and pathways more proximal to the origins of obesity-those that directly regulate energy metabolism or caloric intake-seem to be more feasible targets for therapy. In particular, nitric oxide (NO) is emerging as a central regulator of energy metabolism and body composition. NO bioavailability is decreased in animal models of diet-induced obesity and in obese and insulin-resistant patients, and increasing NO output has remarkable effects on obesity and insulin resistance. This review discusses the role of NO in regulating adiposity and insulin sensitivity and places its modes of action into context with the known causes and consequences of metabolic disease.
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Affiliation(s)
- Brian E Sansbury
- Diabetes and Obesity Center, Institute of Molecular Cardiology, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Physiology and Biophysics, University of Louisville School of Medicine, Louisville, KY 40202, USA
| | - Bradford G Hill
- Diabetes and Obesity Center, Institute of Molecular Cardiology, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Physiology and Biophysics, University of Louisville School of Medicine, Louisville, KY 40202, USA; Department of Biochemistry and Molecular Biology, University of Louisville School of Medicine, Louisville, KY 40202, USA.
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Pong T, Scherrer-Crosbie M, Atochin DN, Bloch KD, Huang PL. Phosphomimetic modulation of eNOS improves myocardial reperfusion and mimics cardiac postconditioning in mice. PLoS One 2014; 9:e85946. [PMID: 24465805 PMCID: PMC3897570 DOI: 10.1371/journal.pone.0085946] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Accepted: 12/04/2013] [Indexed: 12/16/2022] Open
Abstract
Objective Myocardial infarction resulting from ischemia-reperfusion injury can be reduced by cardiac postconditioning, in which blood flow is restored intermittently prior to full reperfusion. Although key molecular mechanisms and prosurvival pathways involved in postconditioning have been identified, a direct role for eNOS-derived NO in improving regional myocardial perfusion has not been shown. The objective of this study is to measure, with high temporal and spatial resolution, regional myocardial perfusion during ischemia-reperfusion and postconditioning, in order to determine the contribution of regional blood flow effects of NO to infarct size and protection. Methods and Results We used myocardial contrast echocardiography to measure regional myocardial blood flow in mice over time. Reperfusion after myocardial ischemia-reperfusion injury is improved by postconditioning, as well as by phosphomimetic eNOS modulation. Knock-in mice expressing a phosphomimetic S1176D form of eNOS showed improved myocardial reperfusion and significantly reduced infarct size. eNOS knock-out mice failed to show cardioprotection from postconditioning. The size of the no-reflow zone following ischemia-reperfusion is substantially reduced by postconditioning and by the phosphomimetic eNOS mutation. Conclusions and Significance Using myocardial contrast echocardiography, we show that temporal dynamics of regional myocardial perfusion restoration contribute to reduced infarct size after postconditioning. eNOS has direct effects on myocardial blood flow following ischemia-reperfusion, with reduction in the size of the no-reflow zone. These results have important implications for ongoing clinical trials on cardioprotection, because the degree of protective benefit may be significantly influenced by the regional hemodynamic effects of eNOS-derived NO.
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Affiliation(s)
- Terrence Pong
- Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, Massachusetts, United States of America
| | - Marielle Scherrer-Crosbie
- Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Cardiac Ultrasound Laboratory, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Dmitriy N. Atochin
- Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Kenneth D. Bloch
- Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care, and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
| | - Paul L. Huang
- Cardiovascular Research Center, Cardiology Division, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America
- School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, United States of America
- Harvard-MIT Division of Health Sciences & Technology, Cambridge, Massachusetts, United States of America
- * E-mail:
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Abstract
The prevalence of obesity has increased remarkably in the past four decades. Because obesity can promote the development of type 2 diabetes and cardiovascular disease, understanding the mechanisms that engender weight gain and discovering safe antiobesity therapies are of critical importance. In particular, the gaseous signaling molecule, nitric oxide (NO), appears to be a central factor regulating adiposity and systemic metabolism. Obese and diabetic states are characterized by a deficit in bioavailable NO, with such decreases commonly attributed to downregulation of endothelial NO synthase (eNOS), loss of eNOS activity, or quenching of NO by its reaction with oxygen radicals. Gain-of-function studies, in which vascular-derived NO has been increased pharmacologically or genetically, reveal remarkable actions of NO on body composition and systemic metabolism. This review addresses the metabolic actions of eNOS and the potential therapeutic utility of harnessing its antiobesogenic effects.
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Affiliation(s)
- Brian E Sansbury
- Diabetes and Obesity Center, Institute of Molecular Cardiology, Louisville, Kentucky, USA; Department of Physiology and Biophysics, Louisville, Kentucky, USA
| | - Bradford G Hill
- Diabetes and Obesity Center, Institute of Molecular Cardiology, Louisville, Kentucky, USA; Department of Physiology and Biophysics, Louisville, Kentucky, USA; Department of Biochemistry and Molecular Biology, University of Louisville School of Medicine, Louisville, Kentucky, USA.
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Sena CM, Pereira AM, Seiça R. Endothelial dysfunction - a major mediator of diabetic vascular disease. Biochim Biophys Acta Mol Basis Dis 2013; 1832:2216-31. [PMID: 23994612 DOI: 10.1016/j.bbadis.2013.08.006] [Citation(s) in RCA: 525] [Impact Index Per Article: 47.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 07/31/2013] [Accepted: 08/20/2013] [Indexed: 12/18/2022]
Abstract
The vascular endothelium is a multifunctional organ and is critically involved in modulating vascular tone and structure. Endothelial cells produce a wide range of factors that also regulate cellular adhesion, thromboresistance, smooth muscle cell proliferation, and vessel wall inflammation. Thus, endothelial function is important for the homeostasis of the body and its dysfunction is associated with several pathophysiological conditions, including atherosclerosis, hypertension and diabetes. Patients with diabetes invariably show an impairment of endothelium-dependent vasodilation. Therefore, understanding and treating endothelial dysfunction is a major focus in the prevention of vascular complications associated with all forms of diabetes mellitus. The mechanisms of endothelial dysfunction in diabetes may point to new management strategies for the prevention of cardiovascular disease in diabetes. This review will focus on the mechanisms and therapeutics that specifically target endothelial dysfunction in the context of a diabetic setting. Mechanisms including altered glucose metabolism, impaired insulin signaling, low-grade inflammatory state, and increased reactive oxygen species generation will be discussed. The importance of developing new pharmacological approaches that upregulate endothelium-derived nitric oxide synthesis and target key vascular ROS-producing enzymes will be highlighted and new strategies that might prove clinically relevant in preventing the development and/or retarding the progression of diabetes associated vascular complications.
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Affiliation(s)
- Cristina M Sena
- Institute of Physiology, Faculty of Medicine, University of Coimbra, Portugal; IBILI, Faculty of Medicine, University of Coimbra, Portugal.
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Li Q, Atochin D, Kashiwagi S, Earle J, Wang A, Mandeville E, Hayakawa K, d'Uscio LV, Lo EH, Katusic Z, Sessa W, Huang PL. Deficient eNOS phosphorylation is a mechanism for diabetic vascular dysfunction contributing to increased stroke size. Stroke 2013; 44:3183-8. [PMID: 23988642 DOI: 10.1161/strokeaha.113.002073] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Phosphorylation of eNOS, an important post-translational modulator of its enzymatic activity, is reduced in diabetes mellitus. We hypothesized that modulation of eNOS phosphorylation could overcome diabetic vascular dysfunction and improves the outcome to stroke. METHODS We used the db/db mouse model of type 2 diabetes mellitus. We mated db/db mice with eNOS knock-in mice that carry single amino acid mutations at the S1176 phosphorylation site; the phosphomimetic SD mutation (serine replaced by aspartate) shows increased eNOS enzymatic activity, whereas the unphosphorylatable SA mutation (serine replaced by alanine) shows decreased eNOS activity. We characterized the vascular anatomy, baseline physiological parameters, and vascular reactivity. We used the middle cerebral artery occlusion model of stroke and measured infarct volume and neurological deficits. RESULTS db/db mice showed diminished eNOS phosphorylation at S1176. eNOS SD and SA mutations do not change the vascular anatomy at the Circle of Willis, brain capillary density, heart rate, or arterial blood gases of db/db mice. The eNOS SD mutation, but not the SA mutation, lowers blood pressure and improves vascular reactivity to acetylcholine in db/db mice. The eNOS SD mutation reduces stroke size and neurological deficit after middle cerebral artery occlusion. CONCLUSIONS Diminished eNOS phosphorylation is a mechanism of vascular dysfunction in db/db mice. We show here that modulation of the eNOS S1176 phosphorylation site in db/db mice is associated with improved vascular reactivity and improved outcome to stroke after middle cerebral artery occlusion.
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Affiliation(s)
- Qian Li
- From the Cardiovascular Research Center (Q.L., D.A., S.K., J.E., A.W., P.L.H.) and Neuroprotection Research Laboratory (E.M., K.H., E.H.L.), Massachusetts General Hospital and Harvard Medical School, Boston, MA; the Departments of Anesthesiology and Molecular, Pharmacology, and Experimental Therapeutics, Mayo Clinic, Rochester, MN (L.V.U., Z.K.); and the Department of Pharmacology and Vascular Biology and Therapeutics Program, Yale University School of Medicine, New Haven, CT (W.S.)
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