1
|
Shores KL, Truskey GA. Mechanotransduction of the vasculature in Hutchinson-Gilford Progeria Syndrome. Front Physiol 2024; 15:1464678. [PMID: 39239311 PMCID: PMC11374724 DOI: 10.3389/fphys.2024.1464678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2024] [Accepted: 08/13/2024] [Indexed: 09/07/2024] Open
Abstract
Hutchinson-Gilford Progeria Syndrome (HGPS) is a premature aging disorder that causes severe cardiovascular disease, resulting in the death of patients in their teenage years. The disease pathology is caused by the accumulation of progerin, a mutated form of the nuclear lamina protein, lamin A. Progerin binds to the inner nuclear membrane, disrupting nuclear integrity, and causes severe nuclear abnormalities and changes in gene expression. This results in increased cellular inflammation, senescence, and overall dysfunction. The molecular mechanisms by which progerin induces the disease pathology are not fully understood. Progerin's detrimental impact on nuclear mechanics and the role of the nucleus as a mechanosensor suggests dysfunctional mechanotransduction could play a role in HGPS. This is especially relevant in cells exposed to dynamic, continuous mechanical stimuli, like those of the vasculature. The endothelial (ECs) and smooth muscle cells (SMCs) within arteries rely on physical forces produced by blood flow to maintain function and homeostasis. Certain regions within arteries produce disturbed flow, leading to an impaired transduction of mechanical signals, and a reduction in cellular function, which also occurs in HGPS. In this review, we discuss the mechanics of nuclear mechanotransduction, how this is disrupted in HGPS, and what effect this has on cell health and function. We also address healthy responses of ECs and SMCs to physiological mechanical stimuli and how these responses are impaired by progerin accumulation.
Collapse
Affiliation(s)
- Kevin L Shores
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| | - George A Truskey
- Department of Biomedical Engineering, Duke University, Durham, NC, United States
| |
Collapse
|
2
|
Shin J, Hong J, Edwards-Glenn J, Krukovets I, Tkachenko S, Adelus ML, Romanoski CE, Rajagopalan S, Podrez E, Byzova TV, Stenina-Adongravi O, Cherepanova OA. Unraveling the Role of Sex in Endothelial Cell Dysfunction: Evidence From Lineage Tracing Mice and Cultured Cells. Arterioscler Thromb Vasc Biol 2024; 44:238-253. [PMID: 38031841 PMCID: PMC10842863 DOI: 10.1161/atvbaha.123.319833] [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: 07/21/2023] [Accepted: 11/14/2023] [Indexed: 12/01/2023]
Abstract
BACKGROUND Biological sex differences play a vital role in cardiovascular diseases, including atherosclerosis. The endothelium is a critical contributor to cardiovascular pathologies since endothelial cells (ECs) regulate vascular tone, redox balance, and inflammatory reactions. Although EC activation and dysfunction play an essential role in the early and late stages of atherosclerosis development, little is known about sex-dependent differences in EC. METHODS We used human and mouse aortic EC as well as EC-lineage tracing (Cdh5-CreERT2 Rosa-YFP [yellow fluorescence protein]) atherosclerotic Apoe-/- mice to investigate the biological sexual dimorphism of the EC functions in vitro and in vivo. Bioinformatics analyses were performed on male and female mouse aortic EC and human lung and aortic EC. RESULTS In vitro, female human and mouse aortic ECs showed more apoptosis and higher cellular reactive oxygen species levels than male EC. In addition, female mouse aortic EC had lower mitochondrial membrane potential (ΔΨm), lower TFAM (mitochondrial transcription factor A) levels, and decreased angiogenic potential (tube formation, cell viability, and proliferation) compared with male mouse aortic EC. In vivo, female mice had significantly higher lipid accumulation within the aortas, impaired glucose tolerance, and lower endothelial-mediated vasorelaxation than males. Using the EC-lineage tracing approach, we found that female lesions had significantly lower rates of intraplaque neovascularization and endothelial-to-mesenchymal transition within advanced atherosclerotic lesions but higher incidents of missing EC lumen coverage and higher levels of oxidative products and apoptosis. RNA-seq analyses revealed that both mouse and human female EC had higher expression of genes associated with inflammation and apoptosis and lower expression of genes related to angiogenesis and oxidative phosphorylation than male EC. CONCLUSIONS Our study delineates critical sex-specific differences in EC relevant to proinflammatory, pro-oxidant, and angiogenic characteristics, which are entirely consistent with a vulnerable phenotype in females. Our results provide a biological basis for sex-specific proatherosclerotic mechanisms.
Collapse
Affiliation(s)
- Junchul Shin
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Junyoung Hong
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Jonnelle Edwards-Glenn
- Department of Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Irene Krukovets
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Svyatoslav Tkachenko
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Maria L. Adelus
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
- Clinical Translational Sciences Graduate Program, The University of Arizona, Tucson, AZ, USA
| | - Casey E. Romanoski
- Department of Cellular and Molecular Medicine, The University of Arizona, Tucson, AZ, USA
| | - Sanjay Rajagopalan
- Department of Medicine, School of Medicine, Case Western Reserve University, Cleveland, OH, USA
| | - Eugene Podrez
- Department of Inflammation and Immunity, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Tatiana V. Byzova
- Department of Neurosciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Olga Stenina-Adongravi
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| | - Olga A. Cherepanova
- Department of Cardiovascular and Metabolic Sciences, Lerner Research Institute, Cleveland Clinic, Cleveland, OH, USA
| |
Collapse
|
3
|
Rodrigues SD, da Silva MLS, Martins LZ, Gomes SEB, Mariani NAP, Silva EJR, Kushima H, Mattos BR, Rizzi E, Dias-Junior CA. Pregnancy hypertension-associated endothelial dysfunction is attenuated by isoflurane anesthesia: Evidence of protective effect related to increases in nitric oxide. Life Sci 2023; 331:122039. [PMID: 37648198 DOI: 10.1016/j.lfs.2023.122039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/14/2023] [Accepted: 08/21/2023] [Indexed: 09/01/2023]
Abstract
AIMS Pregnancy hypertension-induced endothelial dysfunction associated with impairment of nitric oxide (NO) bioavailability and hemodynamic derangements is a challenging for urgent procedures requiring maternal anesthesia. The volatile anesthetic isoflurane has demonstrated NO-associated protective effects. However, this isoflurane-induced effect is still unclear in pregnancy hypertension. Therefore, the present study examined the potential protective effects of isoflurane anesthesia on endothelial dysfunction and hemodynamic changes induced by hypertensive pregnancy associated with fetal and placental growth restrictions. MATERIALS AND METHODS Animals were distributed into four groups: normotensive pregnant rats (Preg), anesthetized pregnant rats (Preg+Iso), hypertensive pregnant rats (HTN-Preg), and anesthetized hypertensive pregnant rats (HTN-Preg+Iso). Systolic and diastolic pressures, mean arterial pressure (MAP), heart rate, fetal and placental weights, vascular contraction, endothelium-derived NO-dependent vasodilation, and NO levels were assessed. The vascular endothelial growth factor (VEGF) levels and endothelial NO synthase (eNOS) Serine (1177) phosphorylation (p-eNOS) expression were also examined. KEY FINDINGS Isoflurane produced more expressive hypotensive effects in the HTN-Preg+Iso versus Preg+Iso group, with respective reductions in MAP by 50 ± 13 versus 25 ± 4 mmHg (P < 0.05). Also, HTN-Preg+Iso compared to the HTN-Preg group showed (respectively) preventions against the weight loss of the fetuses (4.0 ± 0.6 versus 2.8 ± 0.6 g, P < 0.05) and placentas (0.37 ± 0.06 versus 0.30 ± 0.06 mg, P < 0.05), hyper-reactive vasocontraction response (1.8 ± 0.4 versus 2.8 ± 0.6 g, P < 0.05), impaired endothelium-derived NO-dependent vasodilation (84 ± 8 versus 50 ± 17 %, P < 0.05), reduced VEGF levels (147 ± 46 versus 25 ± 13 pg/mL, P < 0.05), and decreased p-eNOS expression (0.24 ± 0.07 versus 0.09 ± 0.05 arbitrary units, P < 0.05). SIGNIFICANCE Isoflurane anesthesia protects maternal endothelial function in pregnancy hypertension, and possibly endothelium-derived NO is involved.
Collapse
Affiliation(s)
- Serginara David Rodrigues
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Maria Luiza Santos da Silva
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Laisla Zanetoni Martins
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Sáskia Estela Biasotti Gomes
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Noemia A P Mariani
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Erick J R Silva
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Hélio Kushima
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil
| | - Bruna Rahal Mattos
- Unit of Biotechnology, University of Ribeirao Preto (UNAERP), Ribeirao Preto 14096-900, SP, Brazil
| | - Elen Rizzi
- Unit of Biotechnology, University of Ribeirao Preto (UNAERP), Ribeirao Preto 14096-900, SP, Brazil
| | - Carlos Alan Dias-Junior
- Department of Biophysics and Pharmacology, Institute of Biosciences, Sao Paulo State University (UNESP), Botucatu, 18618-689, SP, Brazil.
| |
Collapse
|
4
|
Abd Rami AZ, Aminuddin A, Hamid AA, Mokhtar MH, Ugusman A. Nicotine Impairs the Anti-Contractile Function of Perivascular Adipose Tissue by Inhibiting the PPARγ-Adiponectin-AdipoR1 Axis. Int J Mol Sci 2023; 24:15100. [PMID: 37894791 PMCID: PMC10606313 DOI: 10.3390/ijms242015100] [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: 09/07/2023] [Revised: 10/06/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023] Open
Abstract
Nicotine is an addictive compound found in cigarette smoke that leads to vascular dysfunction and cardiovascular diseases. Perivascular adipose tissue (PVAT) exerts an anti-contractile effect on the underlying vasculature through the production of adipokines, such as adiponectin, which acts on adiponectin receptors 1 (adipoR1) to cause vasorelaxation. Peroxisome proliferator-activated receptor gamma (PPARγ) is a transcription factor that regulates adiponectin gene expression and PVAT development. This study aimed to determine the effect of nicotine on the anti-contractile function of PVAT via the PPARγ-adiponectin-adipoR1 axis. Male Sprague Dawley rats were divided into a control group (given normal saline), a nicotine group (given 0.8 mg/kg of nicotine), and a nicotine + PPARγ agonist group (given nicotine and 5 mg/kg of telmisartan). Thoracic aorta PVAT was harvested after 21 days of treatment. The results showed that nicotine reduced the anti-contractile effect of PVAT on the underlying thoracic aorta. Nicotine also decreased the gene and protein expression of PPARγ, adiponectin, and adipoR1 in PVAT. Treatment with telmisartan restored the anti-contractile effect of PVAT and increased the gene and protein expression of PPARγ, adiponectin, and adipoR1 in PVAT. In conclusion, nicotine attenuates the anti-contractile function of PVAT through inhibition of the PPARγ-adiponectin-adipoR1 axis.
Collapse
Affiliation(s)
| | - Amilia Aminuddin
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Cheras, Kuala Lumpur 56000, Malaysia; (A.Z.A.R.); (A.A.H.); (M.H.M.)
| | | | | | - Azizah Ugusman
- Department of Physiology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Cheras, Kuala Lumpur 56000, Malaysia; (A.Z.A.R.); (A.A.H.); (M.H.M.)
| |
Collapse
|
5
|
D’Haese S, Deluyker D, Bito V. Acute Exposure to Glycated Proteins Impaired in the Endothelium-Dependent Aortic Relaxation: A Matter of Oxidative Stress. Int J Mol Sci 2022; 23:ijms232314916. [PMID: 36499244 PMCID: PMC9740119 DOI: 10.3390/ijms232314916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/03/2022] [Accepted: 11/23/2022] [Indexed: 11/30/2022] Open
Abstract
Chronically increased levels of high molecular weight advanced glycation end products (HMW-AGEs) are known to induce cardiovascular dysfunction. Whether an acute increase in HMW-AGE levels affects vascular function remains unknown. In this study, we examined whether acute exposure to HMW-AGEs disturbs aortic vasomotor function. Aortae were obtained from healthy male rats and were acutely pre-treated with HMW-AGEs in organ baths. Aortic relaxation responses to cumulative doses of acetylcholine (ACh), in the presence or absence of superoxide dismutase (SOD), were measured after precontraction with phenylephrine (PE). Furthermore, levels of 3-nitrotyrosine were evaluated on aortic paraffine sections. In our study, we show that acute exposure to HMW-AGEs significantly decreases the aortic relaxation response to ACh. SOD pre-treatment prevents acute HMW-AGEs-induced impairment by limiting superoxide formation. In conclusion, our data demonstrate that acute exposure to HMW-AGEs causes adverse vascular remodelling, characterised by disturbed vasomotor function due to increased oxidative stress. These results create opportunities for future research regarding the acute role of HMW-AGEs in cardiovascular dysfunction.
Collapse
|
6
|
Hansen FB, Esteves GV, Mogensen S, Prat-Duran J, Secher N, Løfgren B, Granfeldt A, Simonsen U. Increased cerebral endothelium-dependent vasodilation in rats in the postcardiac arrest period. J Appl Physiol (1985) 2021; 131:1311-1327. [PMID: 34435510 DOI: 10.1152/japplphysiol.00373.2021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Cardiovascular lability is common after cardiac arrest. We investigated whether altered endothelial function is present in cerebral and mesenteric arteries 2 and 4 h after resuscitation. Male Sprague-Dawley rats were anesthetized, intubated, ventilated, and intravascularly catheterized whereupon rats were randomized into four groups. Following 7 min of asphyxial cardiac arrest and subsequent resuscitation, cardiac arrest and sham rats were observed for either 2 or 4 h. Neuron-specific enolase levels were measured in blood samples. Middle cerebral artery segments and small mesenteric arteries were isolated and examined in microvascular myographs. qPCR and immunofluorescence analysis were performed on cerebral arteries. In cerebral arteries, bradykinin-induced vasodilation was inhibited in the presence of either calcium-activated K+ channel blockers (UCL1684 and senicapoc) or the nitric oxide (NO) synthase inhibitor, Nω-nitro-L-arginine methyl ester hydrochloride (l-NAME), whereas the combination abolished bradykinin-induced vasodilation across groups. Neuron-specific enolase levels were significantly increased in cardiac arrest rats. Cerebral vasodilation was comparable between the 2-h groups, but markedly enhanced in response to bradykinin, NS309 (an opener of small and intermediate calcium-activated K+ channels), and sodium nitroprusside 4 h after cardiac arrest. Endothelial NO synthase and guanylyl cyclase subunit α-1 mRNA expression was unaltered after 2 h, but significantly decreased 4 h after resuscitation. In mesenteric arteries, the endothelium-dependent vasodilation was comparable between corresponding groups at both 2 and 4 h. Our findings show enhanced cerebral endothelium-dependent vasodilation 4 h after cardiac arrest mediated by potentiated endothelial-derived hyperpolarization and NO pathways. Altered cerebral endothelium-dependent vasodilation may contribute to disturbed cerebral perfusion after cardiac arrest.NEW & NOTEWORTHY This is the first study, to our knowledge, to demonstrate enhanced endothelium-dependent vasodilation in middle cerebral arteries in a cardiac arrest rat model. The increased endothelium-dependent vasodilation was a result of potentiated endothelium-derived hyperpolarization and endothelial nitric oxide pathways. Immunofluorescence microscopy confirmed the presence of relevant receptors and eNOS in cerebral arteries, whereas qPCR showed altered expression of genes related to guanylyl cyclase and eNOS. Altered endothelium-dependent vasoregulation may contribute to disturbed cerebral blood flow in the postcardiac arrest period.
Collapse
Affiliation(s)
- Frederik Boe Hansen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.,Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
| | | | - Susie Mogensen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | | | - Niels Secher
- Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
| | - Bo Løfgren
- Research Center for Emergency Medicine, Aarhus University Hospital, Aarhus, Denmark
| | - Asger Granfeldt
- Department of Clinical Medicine, Aarhus University, Aarhus, Denmark.,Department of Anesthesiology and Intensive Care, Aarhus University Hospital, Aarhus, Denmark
| | - Ulf Simonsen
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| |
Collapse
|
7
|
Endothelial function and dysfunction: Impact of sodium-glucose cotransporter 2 inhibitors. Pharmacol Ther 2021; 224:107832. [PMID: 33662450 DOI: 10.1016/j.pharmthera.2021.107832] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/03/2021] [Indexed: 12/16/2022]
Abstract
Diabetes mellitus is associated with endothelial dysfunction that leads to cardiovascular complications. Sodium-glucose cotransporter 2 (SGLT2) inhibitors demonstrated efficacy in glycemic control in type 2 diabetes patients with positive cardiovascular outcome. Recent research revealed a link between SGLT2 inhibition and improved macro- and microvascular endothelial functions. Mechanisms underlying this phenomenon could be due to the role of SLGT2 in the regulation of endothelial physiology. In this review, current knowledge and hypothesis on the link between SGLT2 and endothelial function were critically appraised and the impact of SGLT2 inhibitors on endothelial dysfunction in pre-clinical and clinical studies was discussed.
Collapse
|
8
|
Vasculoprotective Effects of Vildagliptin. Focus on Atherogenesis. Int J Mol Sci 2020; 21:ijms21072275. [PMID: 32218354 PMCID: PMC7177465 DOI: 10.3390/ijms21072275] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/19/2020] [Accepted: 03/23/2020] [Indexed: 12/13/2022] Open
Abstract
Vildagliptin is a representative of Dipeptidyl Peptidase-4 (DPP-4) inhibitors, antihyperglycemic drugs, approved for use as monotherapy and combination therapy in type 2 diabetes mellitus. By inhibiting enzymatic decomposition, DPP-4 inhibitors increase the half-life of incretins such as GLP-1 (Glucagon-like peptide-1) and GIP (Gastric inhibitors polypeptide) and prolong their action. Some studies present results suggesting the anti-sclerotic and vasculoprotective effects of vildagliptin reaching beyond glycemic control. Vildagliptin is able to limit inflammation by suppression of the NF-κB (nuclear factor kappa-light-chain-enhancer of activated B cells) signaling pathway and proinflammatory agents such as TNF-α (tumor necrosis factor α), IL-1β (Interleukin-1β), and IL-8 (Interleukin 8). Moreover, vildagliptin regulates lipid metabolism; attenuates postprandial hypertriglyceridemia; and lowers serum triglycerides, apolipoprotein B, and blood total cholesterol levels. This DPP-4 inhibitor also reduces macrophage foam cell formation, which plays a key role in atheromatous plaque formation and stability. Vildagliptin reduces vascular stiffness via elevation of nitric oxide synthesis, improves vascular relaxation, and results in reduction in both systolic and diastolic blood pressure. Treatment with vildagliptin lowers the level of PAI-1 presenting possible antithrombotic effect. By affecting the endothelium, inflammation, and lipid metabolism, vildagliptin may affect the development of atherosclerosis at its various stages. The article presents a summary of the studies assessing vasculoprotective effects of vildagliptin with special emphasis on atherogenesis.
Collapse
|
9
|
Mak S, Liu Z, Wu L, Guo B, Luo F, Liu Z, Hu S, Wang J, Cui G, Sun Y, Wang Y, Zhang G, Han Y, Zhang Z. Pharmacological Characterizations of anti-Dementia Memantine Nitrate via Neuroprotection and Vasodilation in Vitro and in Vivo. ACS Chem Neurosci 2020; 11:314-327. [PMID: 31922720 DOI: 10.1021/acschemneuro.9b00242] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
We have previously designed and synthesized a series of novel memantine nitrates, and some of them have shown neuroprotective effects; however, the detailed mechanisms remain unknown. In this study, we demonstrated that MN-12, one of the memantine nitrates, concentration-dependently protected against glutamate-induced neurotoxicity in rat primary cultured cerebellar granule neurons (CGNs). Western blotting assays revealed that MN-12 might possess neuroprotective effects through the inhibition of ERK pathway and activation of PI3K/Akt pathway concurrently. Moreover, MN-12 concentration-dependently dilated precontracted rat middle cerebral artery through activation of NO-cGMP pathway ex vivo. In the 2-vessel occlusion (2VO) rat model, MN-12 alleviated the impairments of spatial memory and motor dysfunction possibly via neuroprotection and improvement of the cerebral blood flow. Furthermore, the results of preliminary pharmacokinetic studies showed that MN-12 might quickly distribute to the major organs including the brain, indicating that MN-12 could penetrate the blood-brain barrier. Taken together, MN-12 might provide multifunctional therapeutic benefits for dementia associated with Alzheimer's disease, vascular dementia, and ischemic stroke, via neuroprotection and vessel dilation to improve the cerebral blood flow.
Collapse
Affiliation(s)
- Shinghung Mak
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) , The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518057 , China
- Department of Applied Biology and Chemical Technology, Institute of Modern Chinese Medicine , The Hong Kong Polytechnic University , Hung Hom, Hong Kong , China
| | - Zheng Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
- Foshan Stomatology Hospital, School of Stomatology and Medicine , Foshan University , Foshan 528000 , China
- Foshan Magpie Pharmaceuticals Co., Ltd. , Foshan , 528000 Guangdong , China
| | - Liangmiao Wu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Baojian Guo
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) , The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518057 , China
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Fangcheng Luo
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
- Foshan Magpie Pharmaceuticals Co., Ltd. , Foshan , 528000 Guangdong , China
| | - Ziyan Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Shengquan Hu
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) , The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518057 , China
- Department of Applied Biology and Chemical Technology, Institute of Modern Chinese Medicine , The Hong Kong Polytechnic University , Hung Hom, Hong Kong , China
| | - Jiajun Wang
- Department of Applied Biology and Chemical Technology, Institute of Modern Chinese Medicine , The Hong Kong Polytechnic University , Hung Hom, Hong Kong , China
| | - Guozhen Cui
- Department of Bioengineering , Zunyi Medical University Zhuhai Campus , Zhuhai 519041 , China
| | - Yewei Sun
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Yuqiang Wang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Gaoxiao Zhang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
| | - Yifan Han
- State Key Laboratory of Chinese Medicine and Molecular Pharmacology (Incubation) , The Hong Kong Polytechnic University Shenzhen Research Institute , Shenzhen 518057 , China
- Department of Applied Biology and Chemical Technology, Institute of Modern Chinese Medicine , The Hong Kong Polytechnic University , Hung Hom, Hong Kong , China
| | - Zaijun Zhang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou 510632 , China
- International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education (MOE) , Jinan University College of Pharmacy , 601 Huangpu Avenue West , Guangzhou 510632 , China
| |
Collapse
|
10
|
Taguchi K, Bessho N, Kaneko N, Okudaira K, Matsumoto T, Kobayashi T. Glucagon-like peptide-1 increased the vascular relaxation response via AMPK/Akt signaling in diabetic mice aortas. Eur J Pharmacol 2019; 865:172776. [PMID: 31697935 DOI: 10.1016/j.ejphar.2019.172776] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Revised: 10/28/2019] [Accepted: 11/01/2019] [Indexed: 12/25/2022]
Abstract
The incretin glucagon-like peptide-1 (GLP-1) elicits direct favorable effects on the cardiovascular system. This study aimed to evaluate the acute effects of GLP-1 on improving aortic endothelial dysfunction in diabetic mice. Additionally, we examined whether GLP-1 elucidated the underlying mechanisms. Using the diabetic mouse models induced by nicotinamide and streptozotocin, we investigated the functional changes in the aorta caused by GLP-1. Organ baths were performed for vascular reactivity in isolated aortic rings, and western blotting was used for protein analysis. The diabetic aortas showed enhanced GLP-1-induced relaxation response and nitric oxide (NO) production. However, the pretreatment of GLP-1 did not significantly change the endothelial-dependent relaxation response to acetylcholine and -independent relaxation response to sodium nitroprusside. On the other hand, the GLP-1-induced relaxation response and NO production were abolished by the endothelial NO synthase inhibitor, GLP-1 receptor antagonist, Akt inhibitor, and AMP-activated protein kinase (AMPK) inhibitor. Finally, in diabetic mice, considerable increases in phosphorylation of Akt and AMPK were found in aortas stimulated with GLP-1, both of which were decreased by pretreatment with the AMPK inhibitor. GLP-1 significantly enhanced endothelial-dependent relaxation in diabetic aortas. The effect may be mediated through activation of the AMPK/Akt pathway via a GLP-1 receptor-dependent mechanism.
Collapse
Affiliation(s)
- Kumiko Taguchi
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Nanami Bessho
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Nozomu Kaneko
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Kanami Okudaira
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Takayuki Matsumoto
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan
| | - Tsuneo Kobayashi
- Department of Physiology and Morphology, Institute of Medicinal Chemistry, Hoshi University, Shinagawa-ku, Tokyo, 142-8501, Japan.
| |
Collapse
|
11
|
Araújo AV, Andrade FA, Paulo M, de Paula TD, Potje SR, Pereira AC, Bendhack LM. NO donors induce vascular relaxation by different cellular mechanisms in hypertensive and normotensive rats. Nitric Oxide 2019; 86:12-20. [DOI: 10.1016/j.niox.2019.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/01/2019] [Accepted: 02/13/2019] [Indexed: 12/25/2022]
|
12
|
Henrique Silva F, Yotsumoto Fertrin K, Costa Alexandre E, Beraldi Calmasini F, Fernanda Franco-Penteado C, Ferreira Costa F. Impairment of Nitric Oxide Pathway by Intravascular Hemolysis Plays a Major Role in Mice Esophageal Hypercontractility: Reversion by Soluble Guanylyl Cyclase Stimulator. J Pharmacol Exp Ther 2018; 367:194-202. [PMID: 30108160 DOI: 10.1124/jpet.118.249581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 07/30/2018] [Indexed: 01/18/2023] Open
Abstract
Paroxysmal nocturnal hemoglobinuria (PNH) patients display exaggerated intravascular hemolysis and esophageal disorders. Since excess hemoglobin in the plasma causes reduced nitric oxide (NO) bioavailability and oxidative stress, we hypothesized that esophageal contraction may be impaired by intravascular hemolysis. This study aimed to analyze the alterations of the esophagus contractile mechanisms in a murine model of exaggerated intravascular hemolysis induced by phenylhydrazine (PHZ). For comparative purposes, sickle cell disease (SCD) mice were also studied, a less severe intravascular hemolysis model. Esophagus rings were dissected free and placed in organ baths. Plasma hemoglobin was higher in PHZ compared with SCD mice, as expected. The contractile responses produced by carbachol (CCh), KCl, and electrical-field stimulation (EFS) were superior in PHZ esophagi compared with control but remained unchanged in SCD mice. Preincubation with the NO-independent soluble guanylate cyclase stimulator 3-(4-amino-5-cyclopropylpyrimidin-2-yl)-1-(2-fluorobenzyl)-1H-pyrazolo[3,4-b]pyridine (BAY 41-2272; 1 μM) completely reversed the increased contractile responses to CCh, KCl, and EFS in PHZ mice, but responses remained unchanged with prior treatment with NO donor sodium nitroprusside (300 μM). Protein expression of 3-nitrotyrosine and 4-hydroxynonenal increased in esophagi from PHZ mice, suggesting a state of oxidative stress. In endothelial nitric oxide synthase gene-deficient mice, the contractile responses elicited by KCl and CCh were increased in the esophagus but remained unchanged with the intravascular hemolysis induced by PHZ. In conclusion, our results show that esophagus hypercontractile state occurs in association with lower NO bioavailability due to exaggerated hemolysis intravascular and oxidative stress. Moreover, our study supports the hypothesis that esophageal disorders in PNH patients are secondary to intravascular hemolysis affecting the NO-cGMP pathway.
Collapse
Affiliation(s)
- Fabio Henrique Silva
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| | - Kleber Yotsumoto Fertrin
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| | - Eduardo Costa Alexandre
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| | - Fabiano Beraldi Calmasini
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| | - Carla Fernanda Franco-Penteado
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| | - Fernando Ferreira Costa
- Hematology and Hemotherapy Center (F.H.S., K.Y.F., C.F.F.-P., F.F.C.) and Department of Pharmacology, Faculty of Medical Sciences (E.C.A., F.B.C.), University of Campinas, Campinas, São Paulo, Brazil; and Division of Hematology, University of Washington, Seattle, Washington (K.Y.F.)
| |
Collapse
|
13
|
Endothelial modulation of a nitric oxide donor complex-induced relaxation in normotensive and spontaneously hypertensive rats. Life Sci 2018; 201:130-140. [DOI: 10.1016/j.lfs.2018.03.055] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 03/14/2018] [Accepted: 03/27/2018] [Indexed: 12/29/2022]
|
14
|
Silva CD, Paz IA, Abreu FD, de Sousa AP, Veríssimo CP, Nascimento NR, Paulo TF, Zampieri D, Eberlin MN, Gondim AC, Andrade LC, Carvalho IM, Sousa EH, Lopes LG. Thiocarbonyl-bound metallonitrosyl complexes with visible-light induced DNA cleavage and promising vasodilation activity. J Inorg Biochem 2018; 182:83-91. [DOI: 10.1016/j.jinorgbio.2018.02.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 02/06/2018] [Accepted: 02/07/2018] [Indexed: 12/20/2022]
|
15
|
Paulo M, Grando MD, da Silva RS, Minshall RD, Bendhack LM. The nitric oxide donor RuBPY does not induce in vitro cross-tolerance with acetylcholine. Nitric Oxide 2017; 69:69-77. [DOI: 10.1016/j.niox.2017.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 04/25/2017] [Accepted: 05/20/2017] [Indexed: 11/27/2022]
|
16
|
de Paula TDC, Silva BR, Grando MD, Pernomian L, do Prado AF, Bendhack LM. Relaxation induced by the nitric oxide donor and cyclooxygenase inhibitor NCX2121 in renal hypertensive rat aortas. Eur J Pharm Sci 2017; 107:45-53. [DOI: 10.1016/j.ejps.2017.06.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 05/25/2017] [Accepted: 06/05/2017] [Indexed: 10/19/2022]
|
17
|
Santos FA, Carvalho KMMB, Batista-Lima FJ, Nunes PIG, Viana AFSC, de Carvalho Almeida da Silva AA, da Cruz Fonseca SG, Chaves MH, Rao VS, Magalhães PJC, de Brito TS. The triterpenoid alpha, beta-amyrin prevents the impaired aortic vascular reactivity in high-fat diet-induced obese mice. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:1029-1039. [PMID: 28717838 DOI: 10.1007/s00210-017-1404-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 07/05/2017] [Indexed: 12/28/2022]
Abstract
To characterize the protective effects of the triterpenoid mixture alpha, beta-amyrin (AMY, 20 mg/kg, during 15 days) on the reactivity of isolated aorta of high-fat diet (HFD)-induced obese mice. Male Swiss mice were fed with HFD or normal diet (ND) for 15 weeks. Contractions of thoracic aorta in response to KCl or phenylephrine (PHE) and relaxation by acetylcholine (ACh) or sodium nitroprusside (SNP) were analyzed. HFD-fed mice developed hyperglycemia, hyperlipidemia, and significant body weight gain, parameters prevented by AMY treatment. Whereas aortic contractility did not differ in response to KCl, contractions induced by PHE (1 μM) as well as relaxation induced by ACh (1-30 μM) or SNP (1 nM-0.1 mM) on PHE-contracted aorta were decreased (p < 0.05) in tissues of HFD compared to ND mice, phenomenon significantly (p < 0.05) diminished in HFD mice treated with AMY. The relaxant actions of ACh and SNP were inhibited (p < 0.05) by tetraethylammonium (TEA, 5 mM), apamin (0.1 μM), and 4-aminopyridine (4-AP; 3 mM) in aortae from ND group, but not from HFD. Treatment of HFD mice with AMY rescued the inhibitory effect of TEA (p < 0.05) on vasorelaxant actions of ACh and SNP. 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ) inhibited similarly the relaxant effects of SNP in all groups. 8-Br-cGMP relaxed with similar profile aortae of all groups. By preventing HFD-induced obesity in mice, AMY rescued the blunted contractile response to PHE, and the attenuated vasorelaxation and K+ channel activation (opening) induced by ACh and SNP in isolated aorta.
Collapse
Affiliation(s)
- Flávia Almeida Santos
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil.
| | | | - Francisco José Batista-Lima
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil
| | - Paulo Iury Gomes Nunes
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil
| | | | | | | | - Mariana Helena Chaves
- Department of Organic Chemistry, Federal University of Piauí, Teresina, Piauí, Brazil
| | - Vietla Satyanarayana Rao
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil
| | - Pedro Jorge Caldas Magalhães
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil
| | - Teresinha Silva de Brito
- Department of Physiology and Pharmacology, Faculty of Medicine, Federal University of Ceará, Fortaleza, Ceará, 60430-270, Brazil
| |
Collapse
|
18
|
Hypotensive effect and vascular relaxation in different arteries induced by the nitric oxide donor RuBPY. Nitric Oxide 2017; 62:11-16. [DOI: 10.1016/j.niox.2016.11.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Revised: 11/01/2016] [Accepted: 11/04/2016] [Indexed: 11/21/2022]
|
19
|
Sympathetic Hyperactivity, Increased Tyrosine Hydroxylase and Exaggerated Corpus Cavernosum Relaxations Associated with Oxidative Stress Plays a Major Role in the Penis Dysfunction in Townes Sickle Cell Mouse. PLoS One 2016; 11:e0166291. [PMID: 27935981 PMCID: PMC5147818 DOI: 10.1371/journal.pone.0166291] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 10/26/2016] [Indexed: 11/30/2022] Open
Abstract
Background Sickle cell disease patients display priapism that may progress to erectile dysfunction. However, little is known about the pathophysiological alterations of corpus cavernosum in sickle cell disease. Objective Thus, this study aimed to evaluate the functional and molecular alterations of sympathetic machinery and nitric oxide—cyclic guanosine monophosphate signaling pathway in Townes transgenic sickle cell disease mice. Methods Concentration–response curves to contractile (phenylephrine) and relaxant agents (acetylcholine and sodium nitroprusside) were obtained in corpus cavernosum strips from sickle and C57BL/6 (control) mice. Neurogenic contractions and nitrergic relaxations were obtained using electrical-field stimulation. Measurements of endothelial nitric oxide synthase (eNOS), neuronal nitric oxide synthase (nNOS), phosphodiesterase-5 (PDE5) and α1A-, α1B- and α1D-adrenoceptor mRNA expressions and reactive-oxygen species were performed. Tyrosine hydroxylase phosphorylated at Ser-31 and total tyrosine hydroxylase protein expressions in cavernosal tissues were also measured. Results The neurogenic contractions were higher in the sickle cell disease group, in association with elevated tyrosine hydroxylase phosphorylated at Ser-31 and total tyrosine hydroxylase protein expression, as well as increased tyrosine hydroxylase mRNA expression. Likewise, phenylephrine-induced contractions were greater in the sickle mice, whereas α1A-, α1B- and α1D-adrenoceptor mRNA expression remained unchanged. Cavernosal relaxations to acetylcholine, sodium nitroprusside and EFS were higher in sickle mice, accompanied by decreased eNOS and nNOS, along with lower PDE5 mRNA expression. An increase of about 40% in reactive-oxygen species generation in corpus cavernosum from sickle mice was also detected. Conclusion Our study shows that decreased nitric oxide bioavailability in erectile tissue due to increased oxidative stress leads to both sympathetic hyperactivity and dysregulation of nitric oxide signaling in corpus cavernosum from Townes sickle mice.
Collapse
|
20
|
Liu Z, Yang S, Jin X, Zhang G, Guo B, Chen H, Yu P, Sun Y, Zhang Z, Wang Y. Synthesis and biological evaluation of memantine nitrates as a potential treatment for neurodegenerative diseases. MEDCHEMCOMM 2016; 8:135-147. [PMID: 30108699 DOI: 10.1039/c6md00509h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Accepted: 10/18/2016] [Indexed: 11/21/2022]
Abstract
A series of memantine nitrate derivatives, as dual functional compounds with neuroprotective and vasodilatory activity for neurodegenerative diseases, was designed and synthesized. These compounds combined the memantine skeleton and a nitrate moiety, and thus inhibited the N-methyl-d-aspartic acid receptor and released NO in the central nervous system. The biological evaluation results revealed that the new memantine nitrates were effective in protecting neurons against glutamate-induced injury in vitro. Moreover, memantine nitrates dilated aortic rings against phenylephrine-induced contraction. The structure-activity relationships of neuroprotection and vasodilation were both analyzed. In further studies, compound MN-05 significantly protected cortical neurons by inhibiting Ca2+ influx, reducing free radical production and maintaining the mitochondrial membrane potential. Further research on MN-05 is warranted.
Collapse
Affiliation(s)
- Zheng Liu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Si Yang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Xiaoyong Jin
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Gaoxiao Zhang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Baojian Guo
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Haiyun Chen
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Pei Yu
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Yewei Sun
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Zaijun Zhang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| | - Yuqiang Wang
- Institute of New Drug Research and Guangzhou Key Laboratory of Innovative Chemical Drug Research in Cardio-cerebrovascular Diseases , Jinan University College of Pharmacy , Guangzhou , 510632 , China . ; ; ; Tel: +86 20 8522 5030
| |
Collapse
|
21
|
Silva FH, Karakus S, Musicki B, Matsui H, Bivalacqua TJ, Dos Santos JL, Costa FF, Burnett AL. Beneficial Effect of the Nitric Oxide Donor Compound 3-(1,3-Dioxoisoindolin-2-yl)Benzyl Nitrate on Dysregulated Phosphodiesterase 5, NADPH Oxidase, and Nitrosative Stress in the Sickle Cell Mouse Penis: Implication for Priapism Treatment. J Pharmacol Exp Ther 2016; 359:230-237. [PMID: 27540002 DOI: 10.1124/jpet.116.235473] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/12/2016] [Indexed: 12/12/2022] Open
Abstract
Patients with sickle cell disease (SCD) display priapism, and dysregulated nitric oxide (NO) pathway may contribute to this condition. However, current therapies offered for the prevention of priapism in SCD are few. The 3-(1,3-dioxoisoindolin-2-yl)benzyl nitrate (compound 4C) was synthesized through molecular hybridization of hydroxyurea and thalidomide, which displays an NO-donor property. This study aimed to evaluate the effects of compound 4C on functional and molecular alterations of erectile function in murine models that display low NO bioavailability, SCD transgenic mice, and endothelial NO synthase and neuronal NO synthase double gene-deficient (dNOS-/) mice, focusing on the dysregulated NO-cGMP- phosphodiesterase type 5 (PDE5) pathway and oxidative stress in erectile tissue. Wild-type, SCD, and dNOS-/- mice were treated with compound 4C (100 μmol/kg/d, 3 weeks). Intracavernosal pressure in anesthetized mice was evaluated. Corpus cavernosum tissue was dissected free and mounted in organ baths. SCD and dNOS-/- mice displayed a priapism phenotype, which was reversed by compound 4C treatment. Increased corpus cavernosum relaxant responses to acetylcholine and electrical-field stimulation were reduced by 4C in SCD mice. Likewise, increased sodium nitroprusside-induced relaxant responses were reduced by 4C in cavernosal tissue from SCD and dNOS-/- mice. Compound 4C reversed PDE5 protein expression and reduced protein expressions of reactive oxygen species markers, NADPH oxidase subunit gp91phox, and 3-nitrotyrosine in penises from SCD and dNOS-/- mice. In conclusion, 3-week therapy with the NO donor 4C reversed the priapism in murine models that display lower NO bioavailability. NO donor compounds may constitute an additional strategy to prevent priapism in SCD.
Collapse
Affiliation(s)
- Fábio H Silva
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Serkan Karakus
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Biljana Musicki
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Hotaka Matsui
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Trinity J Bivalacqua
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Jean L Dos Santos
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Fernando F Costa
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| | - Arthur L Burnett
- James Buchanan Brady Urological Institute and Department of Urology, Johns Hopkins School of Medicine, Baltimore, Maryland (F.H.S., S.K., B.M., H.M., T.J.B., A.L.B.); Hematology and Hemotherapy Center, University of Campinas, Campinas, SP, Brazil (F.H.S., F.F.C.); and Laboratório de Pesquisa e Desenvolvimento de Fármacos, Faculdade de Ciências Farmacêuticas, Universidade Estadual Paulista, Araraquara, SP, Brazil (J.L.S.)
| |
Collapse
|
22
|
Perassa LA, Graton ME, Potje SR, Troiano JA, Lima MS, Vale GT, Pereira AAF, Nakamune ACMS, Sumida DH, Tirapelli CR, Bendhack LM, Antoniali C. Apocynin reduces blood pressure and restores the proper function of vascular endothelium in SHR. Vascul Pharmacol 2016; 87:38-48. [PMID: 27353052 DOI: 10.1016/j.vph.2016.06.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/06/2016] [Accepted: 06/18/2016] [Indexed: 10/21/2022]
Abstract
This study has evaluated how the vascular endothelium of hypertensive rats chronically treated with apocynin affects acetylcholine (ACh), sodium nitroprusside (SNP), and phenylephrine (PE) action on the nitric oxide (NO) signal transduction pathway in endothelial (EC) and vascular smooth muscle cells. Treatment with apocynin significantly reduced the mean arterial pressure in spontaneously hypertensive rats (SHR). In addition, apocynin improved the impaired ACh hypotensive effect on SHR. Although systemic oxidative stress was high in SHR, SHR treated with apocynin and normotensive rats presented similar systemic oxidative stress levels. Endothelium significantly blunted PE contractions in intact aortas of treated SHR. The ACh effect was impaired in resistance arteries and aortas of SHR, but this same effect was improved in treated SHR. The SNP potency was higher in intact resistance arteries of treated SHR than in intact resistance arteries of untreated SHR. NO and calcium concentrations increased, whereas reactive oxygen species levels decreased in EC of treated SHR. Aortas of untreated and treated SHR did not differ in terms of sGC alpha or beta units expression. Aorta of treated SHR expressed higher eNOS levels as compared to aorta of untreated SHR. The study groups did not differ with respect to NOX1, NOXO1, or NOX4 expression. However, treatment with apocynin normalized overexpression of NOX2 and its subunit p47phox in aortas of SHR. Based on all the results presented in this study, we suggest apocynin increases NO biovailability by different mechanisms, restoring the proper function of vascular endothelium in SHR.
Collapse
Affiliation(s)
- Ligia A Perassa
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Murilo E Graton
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Simone R Potje
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Jéssica A Troiano
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Mariana S Lima
- Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Gabriel T Vale
- Department of Psychiatry Nursing and Human Sciences, College of Nursing of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Ariana A F Pereira
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Ana Claúdia M S Nakamune
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Doris H Sumida
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil
| | - Carlos R Tirapelli
- Department of Psychiatry Nursing and Human Sciences, College of Nursing of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Lusiane M Bendhack
- Department of Physics and Chemistry, Faculty of Pharmaceutical Sciences of Ribeirão Preto, USP - University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Cristina Antoniali
- Multicenter Graduate Program in Physiological Sciences, SBFis, Brazil; Department of Basic Sciences, School of Dentistry of Araçatuba, UNESP - Univ Estadual Paulista, Araçatuba, São Paulo, Brazil.
| |
Collapse
|
23
|
Rat aorta as a pharmacological tool for in vitro and in vivo studies. Life Sci 2016; 145:190-204. [DOI: 10.1016/j.lfs.2015.12.043] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Revised: 11/26/2015] [Accepted: 12/24/2015] [Indexed: 11/24/2022]
|
24
|
Kangussu LM, Olivon VC, Arifa RDDN, Araújo N, Reis D, Assis MTDA, Soriani FM, de Souza DDG, Bendhack LM, Bonaventura D. Enhancement on reactive oxygen species and COX-1 mRNA levels modulate the vascular relaxation induced by sodium nitroprusside in denuded mice aorta. Fundam Clin Pharmacol 2015; 29:150-63. [PMID: 25619310 DOI: 10.1111/fcp.12103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2014] [Revised: 01/21/2015] [Accepted: 01/21/2015] [Indexed: 11/29/2022]
Abstract
This study aimed to investigate the modulation of nitric oxide/reactive oxygen species in sodium nitroprusside relaxation in mice aorta. Sodium nitroprusside induced relaxation in endothelium-intact (e+) and endothelium-denuded (e-) aortas with greater potency in e+ than in e-. The nitric oxide synthase inhibitor did not alter the sodium nitroprusside relaxation in both e+ and e- aortas. However, the superoxide anion scavenger abolished the difference in sodium nitroprusside potency between e+ and e-. Sodium nitroprusside reduced dihydroethidium-derived fluorescent products in both groups; however, the difference between intact and denuded mice aorta remains. The glutathione levels and basal antioxidant activity of superoxide dismutase were reduced in e- aorta when compared with e+, and these values were not altered by sodium nitroprusside. Confirming these results, the levels of lipid peroxidation in e+ were significantly lower when compared to e-, and these values were not altered by sodium nitroprusside. The sodium nitroprusside potency in the presence of a nonselective COX inhibitor or the EP/DP prostaglandin receptor antagonist in endothelium denuded was similar to that in intact mice aorta. Based on these results, we performed the COX-1 and COX-2 mRNA level studies, and in denuded mice aorta, there was an upregulation in COX-1 mRNA levels. Taken together, our findings show that in the absence of endothelium, there is an enhancement of superoxide levels, leading to GSH consumption and higher levels of lipid peroxidation, showing an intense redox status. Furthermore, in denuded mice aorta, there was an upregulation of COX-1 mRNA expression, leading to vasoconstrictor prostanoids synthesis. The interaction of vasoconstrictor prostanoids with its receptors EP/DP negatively modulates the vascular relaxation induced by SNP in denuded mice aorta.
Collapse
Affiliation(s)
- Lucas M Kangussu
- Departamento de Farmacologia, ICB, Universidade Federal de Minas Gerais, 31.270-901, Belo Horizonte-MG, Brazil
| | | | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Abstract
Xanthine oxidase is an important source of reactive oxygen species; so, it may play a role in the pathogenesis of endothelium dysfunction and its consequences. Allopurinol, a purine analog, is a famous xanthine oxidase inhibitor. This study aimed to investigate possible effects of allopurinol on nitroglycerin tolerance, vasoconstriction, and vasorelaxation in rat aortic ring. Using thoracic aortic rings obtained from male Wistar rats, the effect of allopurinol was examined on nitroglycerin-induced tolerance. In addition, changes of vasoconstriction (by using KCl and phenylephrine) and vasorelaxation (by using carbachol, sodium nitroprusside, and nitroglycerin) were also measured and compared between tissues treated with and without allopurinol. All 3 concentrations of allopurinol (50, 100, and 150 μM) significantly acted against the development of nitroglycerin-induced tolerance in comparison with controls. In terms of vasoconstriction and vasorelaxation, the effect of allopurinol was significant only on carbachol-induced (endothelium related) vasorelaxation in a dose-dependent manner. In conclusion, although allopurinol had no significant effect on the contractile response of the aorta, in accord with the previous data, it significantly intensified endothelium-dependent vasodilation. The inhibitory effect of allopurinol against the development of nitrate-induced tolerance may suggest its clinical benefit and is worth to be studied more extensively.
Collapse
|
26
|
Potje SR, Munhoz FC, Perassa LA, Graton ME, Pereira AA, Nakamune ACM, da Silva RS, Bendhack LM, Sumida DH, Antoniali C. Mechanisms underlying the hypotensive and vasodilator effects of Ru(terpy)(bdq)NO]3+, a nitric oxide donor, differ between normotensive and spontaneously hypertensive rats. Eur J Pharmacol 2014; 741:222-9. [DOI: 10.1016/j.ejphar.2014.08.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2014] [Revised: 08/14/2014] [Accepted: 08/18/2014] [Indexed: 01/08/2023]
|
27
|
Ruthenium complexes as NO donors for vascular relaxation induction. Molecules 2014; 19:9628-54. [PMID: 25004072 PMCID: PMC6271244 DOI: 10.3390/molecules19079628] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 06/09/2014] [Accepted: 06/26/2014] [Indexed: 11/17/2022] Open
Abstract
Nitric oxide (NO) donors are substances that can release NO. Vascular relaxation induction is among the several functions of NO, and the administration of NO donors is a pharmacological alternative to treat hypertension. This review will focus on the physicochemical description of ruthenium-derived NO donor complexes that release NO via reduction and light stimulation. In particular, we will discuss the complexes synthesized by our research group over the last ten years, and we will focus on the vasodilation and arterial pressure control elicited by these complexes. Soluble guanylyl cyclase (sGC) and potassium channels are the main targets of the NO species released from the inorganic compounds. We will consider the importance of the chemical structure of the ruthenium complexes and their vascular effects.
Collapse
|
28
|
MAS-mediated antioxidant effects restore the functionality of angiotensin converting enzyme 2-angiotensin-(1-7)-MAS axis in diabetic rat carotid. BIOMED RESEARCH INTERNATIONAL 2014; 2014:640329. [PMID: 24877125 PMCID: PMC4022170 DOI: 10.1155/2014/640329] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 03/06/2014] [Indexed: 12/29/2022]
Abstract
We hypothesized that endothelial AT1-activated NAD(P)H oxidase-driven generation of reactive oxygen species during type I-diabetes impairs carotid ACE2-angiotensin-(1–7)-Mas axis functionality, which accounts for the impaired carotid flow in diabetic rats. We also hypothesized that angiotensin-(1–7) chronic treatment of diabetic rats restores carotid ACE2-angiotensin-(1–7)-Mas axis functionality and carotid flow. Relaxant curves for angiotensin II or angiotensin-(1–7) were obtained in carotid from streptozotocin-induced diabetic rats. Superoxide or hydrogen peroxide levels were measured by flow cytometry in carotid endothelial cells. Carotid flow was also determined. We found that endothelial AT1-activated NAD(P)H oxidase-driven generation of superoxide and hydrogen peroxide in diabetic rat carotid impairs ACE2-angiotensin-(1–7)-Mas axis functionality, which reduces carotid flow. In this mechanism, hydrogen peroxide derived from superoxide dismutation inhibits ACE2 activity in generating angiotensin-(1–7) seemingly by activating ICl,SWELL, while superoxide inhibits the nitrergic Mas-mediated vasorelaxation evoked by angiotensin-(1–7). Angiotensin-(1–7) treatment of diabetic rats restored carotid ACE2-angiotensin-(1–7)-Mas axis functionality by triggering a positive feedback played by endothelial Mas receptors, that blunts endothelial AT1-activated NAD(P)H oxidase-driven generation of reactive oxygen species. Mas-mediated antioxidant effects also restored diabetic rat carotid flow, pointing to the contribution of ACE2-angiotensin-(1–7)-Mas axis in maintaining carotid flow.
Collapse
|
29
|
Saleh DO, Bayoumi AR, El-Eraky WI, El-Khatib AS. Streptozotocin-induced vascular and biochemical changes in rats: Effects of rosiglitazone vs. metformin. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.bfopcu.2013.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
30
|
Lambrechts K, Pontier JM, Mazur A, Buzzacott P, Morin J, Wang Q, Theron M, Guerrero F. Effect of decompression-induced bubble formation on highly trained divers microvascular function. Physiol Rep 2013; 1:e00142. [PMID: 24400144 PMCID: PMC3871457 DOI: 10.1002/phy2.142] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2013] [Revised: 10/07/2013] [Accepted: 10/08/2013] [Indexed: 11/14/2022] Open
Abstract
We previously showed microvascular alteration of both endothelium-dependent and -independent reactivity after a single SCUBA dive. We aimed to study mechanisms involved in this postdive vascular dysfunction. Ten divers each completed three protocols: (1) a SCUBA dive at 400 kPa for 30 min; (2) a 41-min duration of seawater surface head immersed finning exercise to determine the effect of immersion and moderate physical activity; and (3) a simulated 41-min dive breathing 100% oxygen (hyperbaric oxygen [HBO]) at 170 kPa in order to analyze the effect of diving-induced hyperoxia. Bubble grades were monitored with Doppler. Cutaneous microvascular function was assessed by laser Doppler. Endothelium-dependent (acetylcholine, ACh) and -independent (sodium nitroprusside, SNP) reactivity was tested by iontophoresis. Endothelial cell activation was quantified by plasma Von Willebrand factor and nitric oxide (NO). Inactivation of NO by oxidative stress was assessed by plasma nitrotyrosine. Platelet factor 4 (PF4) was assessed in order to determine platelet aggregation. Blood was also analyzed for measurement of platelet count. Cutaneous vascular conductance (CVC) response to ACh delivery was not significantly decreased by the SCUBA protocol (23 ± 9% before vs. 17 ± 7% after; P = 0.122), whereas CVC response to SNP stimulation decreased significantly (23 ± 6% before vs. 10 ± 1% after; P = 0.039). The HBO and immersion protocols did not affect either endothelial-dependent or -independent function. The immersion protocol induced a significant increase in NO (0.07 ± 0.01 vs. 0.12 ± 0.02 μg/mL; P = 0.035). This study highlighted change in microvascular endothelial-independent but not -dependent function in highly trained divers after a single air dive. The results suggest that the effects of decompression on microvascular function may be modified by diving acclimatization.
Collapse
Affiliation(s)
- Kate Lambrechts
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| | - Jean-Michel Pontier
- Diving and Hyperbaric Department, French Navy Diving School BP 311, 83800, Toulon, France
| | - Aleksandra Mazur
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| | - Peter Buzzacott
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| | - Jean Morin
- Diving and Hyperbaric Department, French Navy Diving School BP 311, 83800, Toulon, France
| | - Qiong Wang
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| | - Michael Theron
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| | - Francois Guerrero
- Orphy Laboratory, Université de Bretagne Occidentale 29200, Brest, France
| |
Collapse
|
31
|
Modulation of vasodilator response via the nitric oxide pathway after acute methyl mercury chloride exposure in rats. BIOMED RESEARCH INTERNATIONAL 2013; 2013:530603. [PMID: 24024199 PMCID: PMC3760274 DOI: 10.1155/2013/530603] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/14/2013] [Accepted: 07/13/2013] [Indexed: 11/29/2022]
Abstract
Mercury exposure induces endothelial dysfunction leading to loss of endothelium-dependent vasorelaxation due to decreased nitric oxide (NO) bioavailability via increased oxidative stress. Our aim was to investigate whether acute treatment with methyl mercury chloride changes the endothelium-dependent vasodilator response and to explore the possible mechanisms behind the observed effects. Wistar rats were treated with methyl mercury chloride (5 mg/kg, po.). The methyl mercury chloride treatment resulted in an increased aortic vasorelaxant response to acetylcholine (ACh). In methyl-mercury-chloride-exposed rats, the % change in vasorelaxant response of ACh in presence of Nω-Nitro-L-arginine methyl ester hydrochloride (L-NAME; 10−4 M) was significantly increased, and in presence of glybenclamide (10−5 M), the response was similar to that of untreated rats, indicating the involvement of NO and not of endothelium-derived hyperpolarizing factor (EDHF). In addition, superoxide dismutase (SOD) + catalase treatment increased the NO modulation of vasodilator response in methyl-mercury-chloride-exposed rats. Our results demonstrate an increase in the vascular reactivity to ACh in aorta of rats acutely exposed to methyl mercury chloride. Methyl mercury chloride induces nitric oxide synthase (NOS) and increases the NO production along with inducing oxidative stress without affecting the EDHF pathway.
Collapse
|
32
|
Pernomian L, Gomes MS, Corrêa FMA, Restini CBA, Ramalho LNZ, de Oliveira AM. Diabetes confers a vasoprotective role to the neurocompensatory response elicited by carotid balloon injury: consequences on contralateral carotid tone and blood flow. Eur J Pharmacol 2013; 708:124-38. [PMID: 23523715 DOI: 10.1016/j.ejphar.2013.02.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2012] [Revised: 02/11/2013] [Accepted: 02/24/2013] [Indexed: 11/30/2022]
Abstract
The purpose from this study was to investigate the consequences of sensory neurocompensation to carotid balloon injury in diabetic rats on angiotensin II-induced contraction and basal blood flow in contralateral carotid. Concentration-response curves for angiotensin II and blood flow were obtained in contralateral carotid from non-treated or capsaicin-treated streptozotocin-induced diabetic rats that underwent carotid balloon injury. Diabetes increased angiotensin II-induced contraction and impaired the blood flow in non-operated rat carotid. In diabetic rats, balloon injury led to neointima formation, which reduced the blood flow in ipsilateral carotid. Carotid balloon injury in diabetic rats reduced angiotensin II-induced contraction and restored the blood flow in contralateral carotid when compared to diabetic non-operated rat carotid. Capsaicin inhibited the effects evoked by carotid balloon injury on diabetic rat contralateral carotid. Endothelium removal, PEG-catalase (hydrogen peroxide scavenger) or l-NPA (neuronal nitric oxide synthase, nNOS, inhibitor) increased angiotensin II-induced contraction in contralateral carotid from diabetic operated rats to the levels observed in diabetic non-operated rat carotid. Our findings suggest that carotid balloon injury in diabetic rats elicits a neurocompensation that attenuates the diabetic hyperreactivity to angiotensin II in contralateral carotid by a sensory nerves-dependent mechanism mediated by hydrogen peroxide derived from endothelial nNOS. This sensory mechanism also restored the blood flow in this vessel, compensating the impaired blood flow in diabetic rat ipsilateral carotid. Thus, our major conclusions are that Diabetes confers a vasoprotective significance to the neurocompensation to carotid balloon injury in preventing further damage at carotid cerebral irrigation after angioplasty in diabetic subjects.
Collapse
Affiliation(s)
- Larissa Pernomian
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Avenida do Café s/n, 14040-903 Ribeirão Preto, SP, Brazil.
| | | | | | | | | | | |
Collapse
|
33
|
Silva FH, Mónica FZ, Báu FR, Brugnerotto AF, Priviero FBM, Toque HA, Antunes E. Superoxide anion production by NADPH oxidase plays a major role in erectile dysfunction in middle-aged rats: prevention by antioxidant therapy. J Sex Med 2013; 10:960-71. [PMID: 23347406 DOI: 10.1111/jsm.12063] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION.: Prevalence of erectile dysfunction (ED) increases progressively with aging, but the ED pathophysiology at its early stages is still poorly investigated. AIM.: This study aimed to evaluate the functional and molecular alterations of erectile function at middle age, focusing on the contribution of oxidative stress in erectile tissue for the ED. METHODS.: Young (3.5-month) and middle-aged (10-month) male Wistar rats were used. Rat corpus cavernosum (RCC) was dissected free and mounted in 10-mL organ baths containing Krebs solution. Intracavernosal pressure (ICP) in anesthetized rats was evaluated. MAIN OUTCOME MEASURES.: Concentration-response curves to endothelium-dependent and endothelium-independent agents, as well as to electrical field stimulation (EFS), were obtained in RCC strips. Measurement of cyclic guanosine monophosphate (cGMP) and expressions of neuronal nitric oxide synthase (nNOS) and endothelial NOS (eNOS), gp91(phox) and superoxide dismutase-1 (SOD-1) expressions in RCC were evaluated. RESULTS.: ICP was significantly reduced in middle-aged compared with young rats. RCC relaxations to acetylcholine (10(-8) to 10(-2) M), sodium nitroprusside (10(-8) to 10(-2) M), sildenafil (10(-9) to 10(-5) M), BAY 41-2272 (10(-9) to 10(-5) M), and EFS (4-32 Hz) were decreased in middle-aged group, which were nearly normalized by apocynin (NADPH oxidase inhibitor; 10(-4) M) or SOD (75 U/mL). Prolonged treatment with apocynin (85 mg/rat/day, 4 weeks) also restored the impaired relaxations in middle-aged rats. Relaxations to 8-bromoguanosine 3',5'-cyclic monophosphate sodium salt (8-Br-cGMP; 10(-8) to 3 × 10(-4) M) remained unchanged between groups. Basal and stimulated cGMP production were lower in middle-aged group, an effect fully restored by apocynin and SOD. Protein expression of nNOS and phosphorylated eNOS (p-eNOS) (Ser-1177) reduced, whereas gp(91phox) mRNA expression increased in RCC from middle-aged rats. CONCLUSIONS.: ED in middle-aged rats is associated with decreased NO bioavailability in erectile tissue due to upregulation of NADPH oxidase subunit gp91(phox) and downregulation of nNOS/p-eNOS. Antioxidant therapies may be a good pharmacological approach to prevent ED at its early stages.
Collapse
Affiliation(s)
- Fábio H Silva
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas, Campinas, SP, Brazil
| | | | | | | | | | | | | |
Collapse
|
34
|
Silva BR, Pernomian L, Bendhack LM. Contribution of oxidative stress to endothelial dysfunction in hypertension. Front Physiol 2012; 3:441. [PMID: 23227009 PMCID: PMC3514688 DOI: 10.3389/fphys.2012.00441] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 11/05/2012] [Indexed: 12/12/2022] Open
Abstract
Endothelial dysfunction is the hallmark of hypertension, which is a multifactorial disorder. In the cardiovascular system reactive oxygen species play a pivotal role in controlling the endothelial function and vascular tone. Physiologically, the endothelium-derived relaxing factors (EDRFs) and endothelium-derived contractile factors (EDCFs) that have functions on the vascular smooth muscle cells. The relaxation induced by the EDRFs nitric oxide (NO), prostacyclin, and the endothelium-derived hyperpolarization factor (EDHF) could be impaired in hypertension. The impaired ability of endothelial cells to release NO along with enhanced EDCFs production has been described to contribute to the endothelium dysfunction, which appears to lead to several cardiovascular diseases. The present review discusses the role of oxidative stress, vascular endothelium, and vascular tone control by EDRFs, mainly NO, and EDCFs in different models of experimental hypertension.
Collapse
Affiliation(s)
- Bruno R Silva
- Department of Pharmacology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto São Paulo, Brazil
| | | | | |
Collapse
|
35
|
Mendes-Silverio CB, Leiria LOS, Morganti RP, Anhê GF, Marcondes S, Mónica FZ, De Nucci G, Antunes E. Activation of haem-oxidized soluble guanylyl cyclase with BAY 60-2770 in human platelets lead to overstimulation of the cyclic GMP signaling pathway. PLoS One 2012; 7:e47223. [PMID: 23144808 PMCID: PMC3493568 DOI: 10.1371/journal.pone.0047223] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 09/12/2012] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND AND AIMS Nitric oxide-independent soluble guanylyl cyclase (sGC) activators reactivate the haem-oxidized enzyme in vascular diseases. This study was undertaken to investigate the anti-platelet mechanisms of the haem-independent sGC activator BAY 60-2770 in human washed platelets. The hypothesis that sGC oxidation potentiates the anti-platelet activities of BAY 60-2770 has been tested. METHODS Human washed platelet aggregation and adhesion assays, as well as flow cytometry for α(IIb)β(3) integrin activation and Western blot for α1 and β1 sGC subunits were performed. Intracellular calcium levels were monitored in platelets loaded with a fluorogenic calcium-binding dye (FluoForte). RESULTS BAY 60-2770 (0.001-10 µM) produced significant inhibition of collagen (2 µg/ml)- and thrombin (0.1 U/ml)-induced platelet aggregation that was markedly potentiated by the sGC inhibitor ODQ (10 µM). In fibrinogen-coated plates, BAY 60-2770 significantly inhibited platelet adhesion, an effect potentiated by ODQ. BAY 60-2770 increased the cGMP levels and reduced the intracellular Ca(2+) levels, both of which were potentiated by ODQ. The cell-permeable cGMP analogue 8-Br-cGMP (100 µM) inhibited platelet aggregation and Ca(2+) levels in an ODQ-insensitive manner. The cAMP levels remained unchanged by BAY 60-2770. Collagen- and thrombin-induced α(IIb)β(3) activation was markedly inhibited by BAY 60-2770 that was further inhibited by ODQ. The effects of sodium nitroprusside (3 µM) were all prevented by ODQ. Incubation with ODQ (10 µM) significantly reduced the protein levels of α1 and β1 sGC subunits, which were prevented by BAY 60-2770. CONCLUSION The inhibitory effects of BAY 60-2770 on aggregation, adhesion, intracellular Ca(2+) levels and α(IIb)β(3) activation are all potentiated in haem-oxidizing conditions. BAY 60-2770 prevents ODQ-induced decrease in sGC protein levels. BAY 60-2770 could be of therapeutic interest in cardiovascular diseases associated with thrombotic complications.
Collapse
Affiliation(s)
- Camila B. Mendes-Silverio
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Luiz O. S. Leiria
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Rafael P. Morganti
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Gabriel F. Anhê
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Sisi Marcondes
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Fabíola Z. Mónica
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Gilberto De Nucci
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
| | - Edson Antunes
- Department of Pharmacology, Faculty of Medical Sciences, University of Campinas (UNICAMP), São Paulo, Brazil
- * E-mail:
| |
Collapse
|
36
|
Chemical mechanism of controlled nitric oxide release from trans-[RuCl([15]aneN4)NO](PF6)2 as a vasorelaxant agent. TRANSIT METAL CHEM 2012. [DOI: 10.1007/s11243-012-9612-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
37
|
Munhoz FC, Potje SR, Pereira AC, Daruge MG, da Silva RS, Bendhack LM, Antoniali C. Hypotensive and vasorelaxing effects of the new NO-donor [Ru(terpy)(bdq)NO+]3+ in spontaneously hypertensive rats. Nitric Oxide 2012; 26:111-7. [DOI: 10.1016/j.niox.2011.12.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Revised: 12/19/2011] [Accepted: 12/26/2011] [Indexed: 11/27/2022]
|
38
|
Shing CM, Fassett RG, Brown L, Coombes JS. The effects of immunosuppressants on vascular function, systemic oxidative stress and inflammation in rats. Transpl Int 2012; 25:337-46. [PMID: 22239125 DOI: 10.1111/j.1432-2277.2011.01420.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Immunosuppressants have been associated with increased cardiovascular disease risk. We determined the effects of calcineurin and mammalian target of rapamycin (mTOR) inhibitor administration on endothelial dysfunction and associated inflammation and oxidative stress in adult rats. Cyclosporine A (low and high dose), sirolimus, tacrolimus, everolimus and placebo were administered to 8-week-old male Wistar rats for 10 consecutive days. Aortic vascular endothelial and smooth muscle function were assessed ex vivo in organ baths. Maximal aortic contraction to noradrenaline in sirolimus-treated rats was significantly greater than cyclosporine groups, everolimus and placebo, whereas endothelial-dependent relaxation was significantly impaired with cyclosporine and tacrolimus compared with everolimus. Endothelial-independent relaxation was impaired in tacrolimus-treated rats compared with low dose cyclosporine, everolimus and sirolimus. Sirolimus was associated with a reduction in plasma interleukin (IL)-1β and tumour necrosis factor (TNF)-α and higher levels of catalase and total antioxidant status. In nontransplanted rats, vascular dysfunction was evident following administration of cyclosporine A, sirolimus and tacrolimus, whereas everolimus did not compromise aortic endothelial or smooth muscle function. At the doses administered in this model, the immunosuppressants exerted varying effects on vascular function.
Collapse
Affiliation(s)
- Cecilia M Shing
- School of Human Life Sciences, University of Tasmania, Launceston, Australia.
| | | | | | | |
Collapse
|
39
|
Tfouni E, Truzzi DR, Tavares A, Gomes AJ, Figueiredo LE, Franco DW. Biological activity of ruthenium nitrosyl complexes. Nitric Oxide 2012; 26:38-53. [DOI: 10.1016/j.niox.2011.11.005] [Citation(s) in RCA: 133] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 11/29/2011] [Accepted: 11/30/2011] [Indexed: 12/20/2022]
|
40
|
Nazari QA, Mizuno K, Kume T, Takada-Takatori Y, Izumi Y, Akaike A. In Vivo Brain Oxidative Stress Model Induced by Microinjection of Sodium Nitroprusside in Mice. J Pharmacol Sci 2012; 120:105-11. [DOI: 10.1254/jphs.12143fp] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
|
41
|
Pernomian L, Santos Gomes M, Baraldi Araujo Restini C, Naira Zambelli Ramalho L, Renato Tirapelli C, Maria de Oliveira A. The role of reactive oxygen species in the modulation of the contraction induced by angiotensin II in carotid artery from diabetic rat. Eur J Pharmacol 2011; 678:15-25. [PMID: 22227335 DOI: 10.1016/j.ejphar.2011.12.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Revised: 12/09/2011] [Accepted: 12/17/2011] [Indexed: 01/26/2023]
Abstract
The modulation played by reactive oxygen species on the angiotensin II-induced contraction in type I-diabetic rat carotid was investigated. Concentration-response curves for angiotensin II were obtained in endothelium-intact or endothelium-denuded carotid from control or streptozotocin-induced diabetic rats, pre-treated with tiron (superoxide scavenger), PEG-catalase (hydrogen peroxide scavenger), dimethylthiourea (hydroxyl scavenger), apocynin [NAD(P)H oxidase inhibitor], SC560 (cyclooxygenase-1 inhibitor), SC236 (cyclooxygenase-2 inhibitor) or Y-27632 (Rho-kinase inhibitor). Reactive oxygen species were measured by flow cytometry in dihydroethidium (DHE)-loaded endothelial cells. Cyclooxygenase and AT(1)-receptor expression was assessed by immunohistochemistry. Diabetes increased the angiotensin II-induced contraction but reduced the agonist potency in rat carotid. Endothelium removal, tiron or apocynin restored the angiotensin II-induced contraction in diabetic rat carotid to control levels. PEG-catalase, DMTU or SC560 reduced the angiotensin II-induced contraction in diabetic rat carotid at the same extent. SC236 restored the angiotensin II potency in diabetic rat carotid. Y-27632 reduced the angiotensin II-induced contraction in endothelium-intact or -denuded diabetic rat carotid. Diabetes increased the DHE-fluorescence of carotid endothelial cells. Apocynin reduced the DHE-fluorescence of endothelial cells from diabetic rat carotid to control levels. Diabetes increased the muscular cyclooxygenase-2 expression but reduced the muscular AT(1)-receptor expression in rat carotid. In summary, hydroxyl radical, hydrogen peroxide and superoxide anion-derived from endothelial NAD(P)H oxidase mediate the hyperreactivity to angiotensin II in type I-diabetic rat carotid, involving the participation of cyclooxygenase-1 and Rho-kinase. Moreover, increased muscular cyclooxygenase-2 expression in type I-diabetic rat carotid seems to be related to the local reduced AT(1)-receptor expression and the reduced angiotensin II potency.
Collapse
Affiliation(s)
- Larissa Pernomian
- Laboratory of Pharmacology, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Avenida Bandeirantes, no. 3900, 14049-900, Ribeirão Preto, SP, Brazil.
| | | | | | | | | | | |
Collapse
|
42
|
Rocha JT, Hipólito UV, Callera GE, Yogi A, Neto Filho MDA, Bendhack LM, Touyz RM, Tirapelli CR. Ethanol induces vascular relaxation via redox-sensitive and nitric oxide-dependent pathways. Vascul Pharmacol 2011; 56:74-83. [PMID: 22155162 DOI: 10.1016/j.vph.2011.11.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 08/24/2011] [Accepted: 11/28/2011] [Indexed: 11/15/2022]
Abstract
We investigated the role of reactive oxygen species (ROS) and nitric oxide (NO) in ethanol-induced relaxation. Vascular reactivity experiments showed that ethanol (0.03-200 mmol/L) induced relaxation in endothelium-intact and denuded rat aortic rings isolated from male Wistar rats. Pre-incubation of intact or denuded rings with l-NAME (non selective NOS inhibitor, 100 μmol/L), 7-nitroindazole (selective nNOS inhibitor, 100 μmol/L), ODQ (selective inhibitor of guanylyl cyclase enzyme, 1 μmol/L), glibenclamide (selective blocker of ATP-sensitive K(+) channels, 3 μmol/L) and 4-aminopyridine (selective blocker of voltage-dependent K(+) channels, 4-AP, 1 mmol/L) reduced ethanol-induced relaxation. Similarly, tiron (superoxide anion (O(2)(-)) scavenger, 1 mmol/L) and catalase (hydrogen peroxide (H(2)O(2)) scavenger, 300 U/mL) reduced ethanol-induced relaxation to a similar extent in both endothelium-intact and denuded rings. Finally, prodifen (non-selective cytochrome P450 enzymes inhibitor, 10 μmol/L) and 4-methylpyrazole (selective alcohol dehydrogenase inhibitor, 10 μmol/L) reduced ethanol-induced relaxation. In cultured aortic vascular smooth muscle cells (VSMCs), ethanol stimulated generation of NO, which was significantly inhibited by l-NAME. In endothelial cells, flow cytometry studies showed that ethanol increased cytosolic Ca(2+) concentration ([Ca(2+)]c), O(2)(-) and cytosolic NO concentration ([NO]c). Tiron inhibited ethanol-induced increase in [Ca(2+)]c and [NO]c. The major new finding of this work is that ethanol induces relaxation via redox-sensitive and NO-cGMP-dependent pathways through direct effects on ROS production and NO signaling. These findings identify putative molecular mechanisms whereby ethanol, at pharmacological concentrations, influences vascular reactivity.
Collapse
MESH Headings
- Animals
- Aorta/drug effects
- Aorta/metabolism
- Cells, Cultured
- Cyclic GMP/metabolism
- Endothelial Cells/drug effects
- Endothelial Cells/metabolism
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- Ethanol/pharmacology
- Male
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- Myocytes, Smooth Muscle/drug effects
- Myocytes, Smooth Muscle/metabolism
- Nitric Oxide/metabolism
- Oxidation-Reduction
- Rats
- Rats, Wistar
- Reactive Oxygen Species/metabolism
- Signal Transduction/drug effects
- Vasodilation/drug effects
Collapse
Affiliation(s)
- Juliana T Rocha
- Department of Psychiatric Nursing and Human Sciences, Laboratory of Pharmacology, College of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | | | | | | | | | | | | | | |
Collapse
|
43
|
Loiola RA, Reis FCG, Kawamoto EM, Scavone C, Abdalla DS, Fernandes L, Pesquero JB. Role of vascular Kinin B1 and B2 receptors in endothelial nitric oxide metabolism. Peptides 2011; 32:1700-5. [PMID: 21704095 DOI: 10.1016/j.peptides.2011.06.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/08/2011] [Accepted: 06/08/2011] [Indexed: 01/28/2023]
Abstract
Kinin B(1) and B(2) receptors play an essential role in inflammatory process and cardiovascular homeostasis. The present study investigated the vascular reactivity and nitric oxide (NO) generation in the isolated mesenteric arteriolar bed from B(1) (B(1)(-/-)) and B(2) receptor (B(2)(-/-)) knockout mice. Endothelial-dependent relaxation was significantly decreased in arterioles from both B(1)(-/-) and B(2)(-/-) in comparison to wild type (WT) mice, with no differences for endothelial-independent relaxating or vasoconstrictor agents. Plasmatic and vascular NO production were markedly reduced in both B(1)(-/-) and B(2)(-/-). In contrast, in the presence of l-arginine, Ca(2+) and co-factors for the enzyme, NO synthase activity was higher in homogenates of mesenteric vessels of B(1)(-/-) and B(2)(-/-). The present study demonstrated that targeted deletion of B(1) or B(2) receptor gene in mice induces important alterations in the vascular reactivity of resistance vessels and NO metabolism. The severe impairment in the endothelial-mediated vasodilation accompanied by decreased NO bioavailability, despite the augmented NOS activity, strongly indicates an exacerbation of NO inactivation in B(1)(-/-) and B(2)(-/-) vessels. The present data provide valuable information in order to clarify the relevance of kinin receptors in regulating vascular physiology and may point to new approaches regarding its correlation with endothelial dysfunction, oxidative stress and NO availability.
Collapse
Affiliation(s)
- Rodrigo A Loiola
- Department of Biophysics, Federal University of São Paulo, São Paulo, SP, Brazil
| | | | | | | | | | | | | |
Collapse
|
44
|
Pernomian L, Gomes MS, de Oliveira AM. Balloon catheter injury abolishes phenylephrine-induced relaxation in the rat contralateral carotid. Br J Pharmacol 2011; 163:770-81. [PMID: 21323906 PMCID: PMC3111679 DOI: 10.1111/j.1476-5381.2011.01275.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2010] [Revised: 12/12/2010] [Accepted: 01/08/2011] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND AND PURPOSE The consequences of compensatory responses to balloon catheter injury in rat carotid artery, on phenylephrine-induced relaxation and contraction in the contralateral carotid artery were studied. EXPERIMENTAL APPROACH Relaxation and contraction concentration-response curves for phenylephrine were obtained for contralateral carotid arteries in the presence of indomethacin (COX inhibitor), SC560 (COX-1 inhibitor), SC236 (COX-2 inhibitor) or 4-hydroxytetramethyl-L-piperidine-1-oxyl (tempol; superoxide dismutase mimetic). Reactive oxygen species were measured in carotid artery endothelial cells fluorimetrically with dihydroethidium. KEY RESULTS Phenylephrine-induced relaxation was abolished in contralateral carotid arteries from operated rats (E(max) = 0.01 ± 0.004 g) in relation to control (E(max) = 0.18 ± 0.005 g). Phenylephrine-induced contractions were increased in contralateral arteries (E(max) = 0.54 ± 0.009 g) in relation to control (E(max) = 0.38 ± 0.014 g). SC236 restored phenylephrine-induced relaxation (E(max) = 0.17 ± 0.004 g) and contraction (E(max) = 0.34 ± 0.018 g) in contralateral arteries. Tempol restored phenylephrine-induced relaxation (E(max) = 0.19 ± 0.012 g) and contraction (E(max) = 0.42 ± 0.014 g) in contralateral arteries, while apocynin did not alter either relaxation (E(max) = 0.01 ± 0.004 g) or contraction (E(max) = 0.54 ± 0.009 g). Dihydroethidium fluorescence was increased in contralateral samples (18 882 ± 435 U) in relation to control (10 455 ± 303 U). SC236 reduced the fluorescence in contralateral samples (8250 ± 365 U). CONCLUSIONS AND IMPLICATIONS Balloon catheter injury abolished phenylephrine-induced relaxation and increased phenylephrine-induced contraction in contralateral carotid arteries, through O(2) (-) derived from COX-2.
Collapse
Affiliation(s)
- L Pernomian
- Department of Pharmacology, School of Medicine of Ribeirão Preto, Laboratory of Pharmacology, University of São PauloRibeirão Preto, São Paulo, Brazil
| | - MS Gomes
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, Laboratory of Pharmacology, University of São PauloRibeirão Preto, São Paulo, Brazil
| | - AM de Oliveira
- Department of Physics and Chemistry, School of Pharmaceutical Sciences of Ribeirão Preto, Laboratory of Pharmacology, University of São PauloRibeirão Preto, São Paulo, Brazil
| |
Collapse
|
45
|
A new nitrosyl ruthenium complex nitric oxide donor presents higher efficacy than sodium nitroprusside on relaxation of airway smooth muscle. Eur J Pharm Sci 2011; 43:370-7. [PMID: 21605670 DOI: 10.1016/j.ejps.2011.05.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 05/02/2011] [Accepted: 05/08/2011] [Indexed: 11/21/2022]
Abstract
Nitric oxide (NO) has been demonstrated to be the primary agent in relaxing airways in humans and animals. We investigated the mechanisms involved in the relaxation induced by NO-donors, ruthenium complex [Ru(terpy)(bdq)NO(+)](3+) (TERPY) and sodium nitroprusside (SNP) in isolated trachea of rats contracted with carbachol in an isolated organs chamber. For instance, we verified the contribution of K(+) channels, the importance of sGC/cGMP pathway, the influence of the extra and intracellular Ca(2+) sources and the contribution of the epithelium on the relaxing response. Additionally, we have used confocal microscopy in order to analyze the action of the NO-donors on cytosolic Ca(2+) concentration. The results demonstrated that both compounds led to the relaxation of trachea in a dependent-concentration way. However, the maximum effect (E(max)) of TERPY is higher than the SNP. The relaxation induced by SNP (but not TERPY) was significantly reduced by pretreatment with ODQ (sGC inhibitor). Only TERPY-induced relaxation was reduced by tetraethylammonium (K(+) channels blocker) and by pre-contraction with 75mM KCl (membrane depolarization). The response to both NO-donors was not altered by the presence of thapsigargin (sarcoplasmic reticulum Ca(2+)-ATPase inhibitor). The epithelium removal has reduced the relaxation only to SNP, and it has no effect on TERPY. The both NO-donors reduced the contraction evoked by Ca(2+) influx, while TERPY have shown a higher inhibitory effect on contraction. Moreover, the TERPY was more effective than SNP in reducing the cytosolic Ca(2+) concentration measured by confocal microscopy. In conclusion, these results show that TERPY induces airway smooth muscle relaxation by cGMP-independent mechanisms, it involves the fluxes of Ca(2+) and K(+) across the membrane, it is more effective in reducing cytosolic Ca(2+) concentration and inducing relaxation in the rat trachea than the standard drug, SNP.
Collapse
|
46
|
Nurullahoğlu Atalik KE, Nurullahoğlu ZU, Kiliç M. Role of the nitric oxide on relaxation of the human umbilical artery during cooling. YAKUGAKU ZASSHI 2011; 131:661-7. [PMID: 21532262 DOI: 10.1248/yakushi.131.661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, the effects of cooling (to 28°C) on the vasodilatation induced by diazoxide (10(-9)-3×10(-4) M), isoproterenol (10(-9)-3×10(-4) M) and magnesium sulphate (0.1-30 mM) on serotonin-pre-contracted human umbilical artery and the role of nitric oxide in these effects were analyzed. Diazoxide, isoproterenol and magnesium produced concentration-dependent relaxation of human umbilical artery precontracted with serotonin (10(-6) M). During cooling, the pIC(50) values and maximal responses to these agents were significantly lower than at 37°C. Cooling to 28°C in the presence of N(G)-nitro-L-arginine methyl ester (L-NAME, 10(-4) M) did not modify the effects of temperature on diazoxide, isoproterenol and magnesium-induced relaxations. These results suggest that cooling-induced changes of diazoxide, isoproterenol, and magnesium sulphate in human umbilical artery are independent of nitric oxide.
Collapse
|
47
|
Lunardi CN, da Silva RS, Bendhack LM. New nitric oxide donors based on ruthenium complexes. Braz J Med Biol Res 2009; 42:87-93. [PMID: 19219301 DOI: 10.1590/s0100-879x2009000100013] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2008] [Accepted: 01/12/2008] [Indexed: 11/21/2022] Open
Abstract
Nitric oxide (NO) donors produce NO-related activity when applied to biological systems. Among its diverse functions, NO has been implicated in vascular smooth muscle relaxation. Despite the great importance of NO in biological systems, its pharmacological and physiological studies have been limited due to its high reactivity and short half-life. In this review we will focus on our recent investigations of nitrosyl ruthenium complexes as NO-delivery agents and their effects on vascular smooth muscle cell relaxation. The high affinity of ruthenium for NO is a marked feature of its chemistry. The main signaling pathway responsible for the vascular relaxation induced by NO involves the activation of soluble guanylyl-cyclase, with subsequent accumulation of cGMP and activation of cGMP-dependent protein kinase. This in turn can activate several proteins such as K+ channels as well as induce vasodilatation by a decrease in cytosolic Ca2+. Oxidative stress and associated oxidative damage are mediators of vascular damage in several cardiovascular diseases, including hypertension. The increased production of the superoxide anion (O2-) by the vascular wall has been observed in different animal models of hypertension. Vascular relaxation to the endogenous NO-related response or to NO released from NO deliverers is impaired in vessels from renal hypertensive (2K-1C) rats. A growing amount of evidence supports the possibility that increased NO inactivation by excess O2- may account for the decreased NO bioavailability and vascular dysfunction in hypertension.
Collapse
Affiliation(s)
- C N Lunardi
- Laboratório de Farmacologia, Departamento de Física e Química, Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
| | | | | |
Collapse
|
48
|
Bonaventura D, Lunardi CN, Rodrigues GJ, Neto MA, Vercesi JA, de Lima RG, da Silva RS, Bendhack LM. Endothelium negatively modulates the vascular relaxation induced by nitric oxide donor, due to uncoupling NO synthase. J Inorg Biochem 2009; 103:1366-74. [DOI: 10.1016/j.jinorgbio.2009.07.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2009] [Revised: 07/22/2009] [Accepted: 07/24/2009] [Indexed: 10/20/2022]
|
49
|
Abstract
Astaxanthin is a biological antioxidant naturally found in a wide variety of aquatic living organisms, and has shown various pharmacological activities, such as anti-inflammatory and antidiabetic activities. A recent study reported that the administration of astaxanthin induced a significant reduction in blood pressure and delayed the incidence of stroke in stroke-prone spontaneously hypertensive rats, suggesting that astaxanthin also has antihypertensive effect. In a study using aortic rings of spontaneously hypertensive rats, astaxanthin induced a significant reduction of the contractile responses of the aorta to α-adrenergic receptor agonist and angiotensin II, which may contribute to the antihypertensive effect of astaxanthin. In a histopathological study, astaxanthin decreased coronary artery wall thickness compared with the control, indicating the possibility that astaxanthin ameliorates hypertension-induced vascular remodeling. Astaxanthin has anti-inflammatory, antidiabetic, antihypertensive, and antioxidative activities; therefore, we should perform further studies to elucidate an antiatherogenic effect of astaxanthin.
Collapse
|