1
|
Leo JA, Sabapathy S, Kuck L, Simmonds MJ. Modulation of red blood cell nitric oxide synthase phosphorylation in the quiescent and exercising human forearm. Am J Physiol Regul Integr Comp Physiol 2023; 325:R260-R268. [PMID: 37424398 DOI: 10.1152/ajpregu.00017.2023] [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: 01/17/2023] [Revised: 06/14/2023] [Accepted: 07/03/2023] [Indexed: 07/11/2023]
Abstract
In vitro investigations demonstrate that human erythrocytes synthesize nitric oxide via a functional isoform of endothelial nitric oxide synthase (NOS) (RBC-NOS). We tested the hypothesis that phosphorylation of RBC-NOS at serine residue 1177 (RBC-NOS1177) would be amplified in blood draining-active skeletal muscle. Furthermore, given hypoxemia modulates local blood flow and thus shear stress, and nitric oxide availability, we performed duplicate experiments under normoxia and hypoxia. Nine healthy volunteers performed rhythmic handgrip exercise at 60% of individualized maximal workload for 3.5 min while breathing room air (normoxia) and after being titrated to an arterial oxygen saturation ≈80% (hypoxemia). We measured brachial artery blood flow by high-resolution duplex ultrasound, while continuously monitoring vascular conductance and mean arterial pressure using finger photoplethysmography. Blood was sampled during the final 30 s of each stage from an indwelling cannula. Blood viscosity was measured to facilitate calculation of accurate shear stresses. Erythrocytes were assessed for levels of phosphorylated RBC-NOS1177 and cellular deformability from blood collected at rest and during exercise. Forearm exercise increased blood flow, vascular conductance, and vascular shear stress, which coincided with a 2.7 ± 0.6-fold increase in RBC-NOS1177 phosphorylation (P < 0.0001) and increased cellular deformability (P < 0.0001) under normoxia. When compared with normoxia, hypoxemia elevated vascular conductance and shear stress (P < 0.05) at rest, while cellular deformability (P < 0.01) and RBC-NOS1177 phosphorylation (P < 0.01) increased. Hypoxemic exercise elicited further increases in vascular conductance, shear stress, and cell deformability (P < 0.0001), although a subject-specific response in RBC-NOS1177 phosphorylation was observed. Our data yield novel insights into the manner that hemodynamic force and oxygen tension modulate RBC-NOS in vivo.
Collapse
Affiliation(s)
- Jeffrey A Leo
- Exercise and Sport, School of Health Sciences and Social Work, Griffith University, Gold Coast, Queensland, Australia
| | - Surendran Sabapathy
- Exercise and Sport, School of Health Sciences and Social Work, Griffith University, Gold Coast, Queensland, Australia
| | - Lennart Kuck
- Biorheology Research Laboratory, Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia
| | - Michael J Simmonds
- Biorheology Research Laboratory, Menzies Health Institute Queensland, Griffith University, Gold Coast, Queensland, Australia
| |
Collapse
|
2
|
Local and Systemic Inflammation and Oxidative Stress After a Single Bout of Maximal Walking in Patients With Symptomatic Peripheral Artery Disease. J Cardiovasc Nurs 2021; 36:498-506. [DOI: 10.1097/jcn.0000000000000686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
3
|
Ishihara R, Barros MPD, Silva CMD, Borges LDS, Hatanaka E, Lambertucci RH. Melatonin improves the antioxidant capacity in cardiac tissue of Wistar rats after exhaustive exercise. Free Radic Res 2021; 55:776-791. [PMID: 34100318 DOI: 10.1080/10715762.2021.1939024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We investigated the effects of melatonin on the onset and resolution of the oxidative stress in the cardiac muscle in melatonin-treated and nontreated rats subjected to an exhaustive exercise session. Forty male rats were divided into: melatonin-treated (20 mg/kg supplemented for 10 d) and control. On the 10th day, each group was subdivided according to euthanasia moments: control or melatonin-treated not exercised (C0h and M0h); immediately after the exercise (CIA and MIA); and 2 h after exercise (C2h and M2h). The heart of animals was removed and the levels of oxidative stress index (OSI) and the formation of thiobarbituric acid reactive substances (TBARS), protein carbonyl, and the activities of aconitase, catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD) were evaluated. Total antioxidant status (TAS), total oxidant status (TOS), and the protein expression of CAT, GPx, and SOD was also measured. Our data revealed significant differences on: (i) OSI (p=.029), CAT activity (p=.016), CAT content (p<.001), GPx content (p=.014), reduced glutathione levels (p<.001), and aconitase activity (p<.001) for interaction of melatonin; (ii) GPx activity (p=.005), reduced glutathione (p=.004), protein carbonyl (p=.035), and TBARS levels (p=.028) between groups, and (iii) TBARS levels (p=.016) for significance between moments. Although the exhaustive exercise protocol imposed mild oxidative stress on the cardiac tissue of rats, melatonin induced antioxidant responses that rebalanced the redox status of the cardiac tissue, especially after exhaustive exercise.
Collapse
Affiliation(s)
- Rafael Ishihara
- Department of Biosciences, Federal University of Sao Paulo, Santos, Brazil
| | - Marcelo Paes de Barros
- Institute of Physical Activity Sciences and Sports (ICAFE), Cruzeiro do Sul University, São Paulo, Brazil
| | | | - Leandro da Silva Borges
- Institute of Physical Activity Sciences and Sports (ICAFE), Cruzeiro do Sul University, São Paulo, Brazil
| | - Elaine Hatanaka
- Institute of Physical Activity Sciences and Sports (ICAFE), Cruzeiro do Sul University, São Paulo, Brazil
| | | |
Collapse
|
4
|
Ulker P, Özen N, Abduleyeva G, Köksoy S, Yaraş N, Basralı F. Rho-kinase is a negative regulator of red blood cell eNOS under basal conditions. Clin Hemorheol Microcirc 2019; 72:407-419. [PMID: 30909198 DOI: 10.3233/ch-190578] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Rho-kinase, an effector of the small GTPase RhoA, is known to be a novel inhibitory regulator of eNOS in endothelial cells under basal conditions and disease states. However, although RBC possesses active RhoA/Rho-kinase pathway, Rho-kinase mediated eNOS regulation has not been investigated in RBC, so far. OBJECTIVE The aim of the present study is to investigate whether eNOS activity is regulated by Rho-kinase under basal conditions and to evaluate whether inhibition of this enzyme causes eNOS activation and intracellular NO production in RBC. METHODS RBC packeds were isolated from healthy volunteers and resuspended in Hepes solution at a hematocrit of 0.01 l/l. Intracellular NO and Ca+2 levels and eNOS activation measured by flow cytometry in response to Rho-kinase inhibitors, fasudil and Y-27632, in the absence and presence of NOS, and PI3K inhibitors. RESULTS Rho-kinase inhibitors fasudil and Y-27632 found to increase intracellular NO concentrations. These inhibitors also cause enhancement of intracellular Ca+2 and serine 1177 phosphorylated eNOS levels. Besides, although these responses have shown to be suppressed by NOS enzyme, PI3K inhibition had no effect on this mechanism. CONCLUSIONS The results of the present study demonstrated that RBC eNOS enzyme activity is regulated by inhibitory Rho-kinase pathway under basal conditions and inhibition of this pathway enhances the activity of eNOS in RBC. This activation is mediated by both intracellular Ca+2 and Serine 1177 phosphorylated eNOS increment, with no contribution of AKT activation, in RBC. The mechanism we described here gives first evidences about Rho-kinase mediated eNOS regulation in RBC under basal conditions. This pathway could also be more important under disease states.
Collapse
|
5
|
Teixeira B, Boeno F, Siqueira C, Cadore E, Ribeiro J, Reischak-Oliveira A, dos Santos Cunha G. Strength training enhances endothelial and muscular function in postmenopausal women. Sci Sports 2019. [DOI: 10.1016/j.scispo.2018.09.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
|
6
|
Lopes GO, Farinatti P, Lopes KG, Medeiros-Lima DJ, Matsuura C, Oliveira RB, Bouskela E, Bottino DA, Muccillo F, Tibirica E, Borges JP. Increased vascular function and superoxide dismutase activity in physically active vs inactive adults living with HIV. Scand J Med Sci Sports 2018; 29:25-33. [PMID: 30267551 DOI: 10.1111/sms.13312] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 08/28/2018] [Accepted: 09/20/2018] [Indexed: 12/28/2022]
Abstract
This study compared macro- and microvascular endothelial function and redox status in active vs inactive HIV-infected patients (HIVP) under antiretroviral therapy. Using a cross-sectional design, macro- and microvascular reactivity, systemic microvascular density, and oxidative stress were compared between 19 HIVP (53.1 ± 6.1 year) enrolled in a multimodal training program (aerobic, strength and flexibility exercises) for at least 12 months (60-minutes sessions performed 3 times/wk with moderate intensity) vs 25 sedentary HIVP (51.2 ± 6.3 year). Forearm blood flow during reactive hyperemia (521.7 ± 241.9 vs 361.4% ± 125.0%; P = 0.04) and systemic microvascular density (120.8 ± 21.1 vs 105.6 ± 25.0 capillaries/mm2 ; P = 0.03) was greater in active than inactive patients. No significant difference between groups was detected for endothelium-dependent and independent skin microvascular vasodilation (P > 0.05). As for redox status, carbonyl groups (P = 0.22), lipid peroxidation (P = 0.86), catalase activity (P = 0.99), and nitric oxide levels (P = 0.72) were similar across groups. However, superoxide dismutase activity was greater in active vs inactive HIVP (0.118 ± 0.013 vs 0.111 ± 0.007 U/mL; P = 0.05). Immune function reflected by total T CD4 and T CD8 counts (cell/mm3 ) did not differ between active and inactive groups (P > 0.82). In conclusion, physically active HIVP exhibited similar immune function, but greater macrovascular reactivity, systemic microvascular density, and superoxide dismutase activity than inactive patients of similar age.
Collapse
Affiliation(s)
- Gabriella O Lopes
- Laboratory of Physical Activity and Health Promotion, Institute of Physical Education and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Exercise and Sports Sciences, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Paulo Farinatti
- Laboratory of Physical Activity and Health Promotion, Institute of Physical Education and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Exercise and Sports Sciences, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Physical Activity Sciences, Salgado de Oliveira University, Niteroi, Brazil
| | - Karynne G Lopes
- Laboratory of Physical Activity and Health Promotion, Institute of Physical Education and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Clinical and Experimental Research Laboratory on Vascular Biology (BioVasc), Biomedical Center, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Daniel J Medeiros-Lima
- Department of Pharmacology and Psychobiology, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Cristiane Matsuura
- Department of Pharmacology and Psychobiology, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Ricardo B Oliveira
- Laboratory of Physical Activity and Health Promotion, Institute of Physical Education and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Exercise and Sports Sciences, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Eliete Bouskela
- Clinical and Experimental Research Laboratory on Vascular Biology (BioVasc), Biomedical Center, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Daniel A Bottino
- Clinical and Experimental Research Laboratory on Vascular Biology (BioVasc), Biomedical Center, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| | - Fabiana Muccillo
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro, Brazil
| | - Eduardo Tibirica
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro, Brazil
| | - Juliana P Borges
- Laboratory of Physical Activity and Health Promotion, Institute of Physical Education and Sports, University of Rio de Janeiro State, Rio de Janeiro, Brazil.,Graduate Program in Exercise and Sports Sciences, University of Rio de Janeiro State, Rio de Janeiro, Brazil
| |
Collapse
|
7
|
Ulker P, Özen N, Abdullayeva G, Köksoy S, Yaraş N, Basrali F. Extracellular ATP activates eNOS and increases intracellular NO generation in Red Blood Cells. Clin Hemorheol Microcirc 2018; 68:89-101. [PMID: 29036803 DOI: 10.3233/ch-170326] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND It has been well documented that ATP activates NOS enzymes and causes increased NO production in several cell types. Although RBC known to possesses eNOS enzyme activity, it has not been investigated whether RBC eNOS could be induced by extracellular ATP. OBJECTIVE The aim of the present study is to evaluate extracellular ATP mediated eNOS activation and NO production in RBC. METHODS RBC packed were isolated from healthy volunteers and re-suspended in Hepes solution at a hematocrit of 0.01 l/l. Intracellular NO and Ca+2 levels and eNOS activation measured by flow cytometry in response to P2X receptor agonist, Bz-ATP, in the absence and presence of NOS, P2 receptors and PI3K inhibitors. RESULTS P2X receptor agonist Bz-ATP found to increase intracellular NO, Ca+2 and serine 1177 phosphorylated eNOS levels and these responses have shown to be suppressed by NOS enzyme, P2 receptors and PI3K inhibitors. CONCLUSIONS The results of the study clearly demonstrated extracellular ATP induced NO generation in RBC through intracellular Ca+2 and PI3K/Akt pathways. The mechanism we described here might be important at basal conditions and also in conditions with increased ATP release.
Collapse
Affiliation(s)
- Pinar Ulker
- Department of Physiology, Medical Faculty, Akdeniz University, Antalya, Turkey
| | - Nur Özen
- Department of Physiology, Medical Faculty, Akdeniz University, Antalya, Turkey
| | - Günel Abdullayeva
- Department of Physiology, Medical Faculty, Akdeniz University, Antalya, Turkey
| | - Sadi Köksoy
- Department of Medical Microbiology, Medical Faculty, AkdenizUniversity, Antalya, Turkey
| | - Nazmi Yaraş
- Department of Biophysics, Medical Faculty, AkdenizUniversity, Antalya, Turkey
| | - Filiz Basrali
- Department of Physiology, Medical Faculty, Akdeniz University, Antalya, Turkey
| |
Collapse
|
8
|
Borges JP, Nascimento AR, Lopes GO, Medeiros-Lima DJM, Coelho MP, Nascimento PMC, Kopiler DA, Matsuura C, Mediano MFF, Tibirica E. The impact of exercise frequency upon microvascular endothelium function and oxidative stress among patients with coronary artery disease. Clin Physiol Funct Imaging 2017; 38:840-846. [PMID: 29280281 DOI: 10.1111/cpf.12492] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/23/2017] [Indexed: 12/16/2022]
Abstract
PURPOSE This study compared the effects of low and high weekly exercise frequencies on microvascular endothelium function and oxidative stress among patients with coronary artery disease. METHODS Thirty-four male patients completed a 6-month cardiac rehabilitation programme, from which 23 performed exercise with a high frequency (HF) and 11 with a low frequency (LF). Systemic microvascular blood flow, maximal aerobic capacity, blood lipids, oxidative stress and anthropometric data were assessed prior to and after the cardiac rehabilitation programme. Microvascular blood flow was assessed in the skin of the forearm using laser speckle contrast imaging coupled with iontophoresis of acetylcholine. RESULTS Maximal aerobic capacity, biochemical analysis and anthropometric data were similar between groups prior to and after the cardiac rehabilitation programme (P>0·05). However, after 6 months of cardiac rehabilitation performed with HF, there was an increase in the peak response to acetylcholine compared with LF (83·5 ± 58·5 versus 21·8 ± 22·4%; P<0·05). Changes in lipid peroxidation (HF: -5·5 ± 9·4 versus LF: 2·2 ± 12·0 pmol MDA mg-1 ; P = 0·19), catalase activity (HF: 0·07 ± 0·17 versus LF: 0·04 ± 0·08 U mg-1 ; P = 0·74) and nitric oxide levels (HF: 1·8 ± 15·3 versus LF: -3·2 ± 12·3 μM; P = 0·36) were similar between groups after cardiac rehabilitation. CONCLUSION Six months of aerobic exercise training performed with high frequency is preferable to low frequency aiming endothelium microvascular function increases in patients with coronary artery disease. The mechanisms involved in this response are unclear and warrant additional research.
Collapse
Affiliation(s)
- Juliana P Borges
- Laboratory of Physical Activity and Health Promotion, State University of Rio de Janeiro, Rio de Janeiro
| | - Alessandro R Nascimento
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro.,Laboratory of Cardiovascular Investigation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro
| | - Gabriella O Lopes
- Laboratory of Physical Activity and Health Promotion, State University of Rio de Janeiro, Rio de Janeiro.,National Institute of Cardiology, Ministry of Health, Rio de Janeiro
| | - Daniel J M Medeiros-Lima
- Department of Pharmacology and Psychobiology, State University of Rio de Janeiro, Rio de Janeiro
| | - Marina P Coelho
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro
| | | | - Daniel A Kopiler
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro
| | - Cristiane Matsuura
- Department of Pharmacology and Psychobiology, State University of Rio de Janeiro, Rio de Janeiro
| | - Mauro Felippe F Mediano
- Evandro Chagas National Institute of Infectious Diseases, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Eduardo Tibirica
- National Institute of Cardiology, Ministry of Health, Rio de Janeiro.,Laboratory of Cardiovascular Investigation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro
| |
Collapse
|
9
|
Cerium Oxide Nanoparticles in Lung Acutely Induce Oxidative Stress, Inflammation, and DNA Damage in Various Organs of Mice. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:9639035. [PMID: 28392888 PMCID: PMC5368370 DOI: 10.1155/2017/9639035] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/26/2017] [Accepted: 02/09/2017] [Indexed: 12/21/2022]
Abstract
CeO2 nanoparticles (CeO2 NPs) which are used as a diesel fuel additive are emitted in the particulate phase in the exhaust, posing a health concern. However, limited information exists regarding the in vivo acute toxicity of CeO2 NPs on multiple organs. Presently, we investigated the acute (24 h) effects of intratracheally instilled CeO2 NPs in mice (0.5 mg/kg) on oxidative stress, inflammation, and DNA damage in major organs including lung, heart, liver, kidneys, spleen, and brain. Lipid peroxidation measured by malondialdehyde production was increased in the lungs only, and reactive oxygen species were increased in the lung, heart, kidney, and brain. Superoxide dismutase activity was decreased in the lung, liver, and kidney, whereas glutathione increased in lung but it decreased in the kidney. Total nitric oxide was increased in the lung and spleen but it decreased in the heart. Tumour necrosis factor-α increased in all organs studied. Interleukin- (IL-) 6 increased in the lung, heart, liver, kidney, and spleen. IL-1β augmented in the lung, heart, kidney, and spleen. Moreover, CeO2 NPs induced DNA damage, assessed by COMET assay, in all organs studied. Collectively, these findings indicate that pulmonary exposure to CeO2 NPs causes oxidative stress, inflammation, and DNA damage in multiple organs.
Collapse
|