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Chen Z, Li S, Liu M, Yin M, Chen J, Li Y, Li Q, Zhou Y, Xia Y, Chen A, Lu D, Li C, Chen Y, Qian J, Ge J. Nicorandil alleviates cardiac microvascular ferroptosis in diabetic cardiomyopathy: Role of the mitochondria-localized AMPK-Parkin-ACSL4 signaling pathway. Pharmacol Res 2024; 200:107057. [PMID: 38218357 DOI: 10.1016/j.phrs.2024.107057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/15/2024]
Abstract
Mitochondria-associated ferroptosis exacerbates cardiac microvascular dysfunction in diabetic cardiomyopathy (DCM). Nicorandil, an ATP-sensitive K+ channel opener, protects against endothelial dysfunction, mitochondrial dysfunction, and DCM; however, its effects on ferroptosis and mitophagy remain unexplored. The present study aimed to assess the beneficial effects of nicorandil against endothelial ferroptosis in DCM and the underlying mechanisms. Cardiac microvascular perfusion was assessed using a lectin perfusion assay, while mitophagy was assessed via mt-Keima transfection and transmission electron microscopy. Ferroptosis was examined using mRNA sequencing, fluorescence staining, and western blotting. The mitochondrial localization of Parkin, ACSL4, and AMPK was determined via immunofluorescence staining. Following long-term diabetes, nicorandil treatment improved cardiac function and remodeling by alleviating cardiac microvascular injuries, as evidenced by the improved microvascular perfusion and structural integrity. mRNA-sequencing and biochemical analyses showed that ferroptosis occurred and Pink1/Parkin-dependent mitophagy was suppressed in cardiac microvascular endothelial cells after diabetes. Nicorandil treatment suppressed mitochondria-associated ferroptosis by promoting the Pink1/Parkin-dependent mitophagy. Moreover, nicorandil treatment increased the phosphorylation level of AMPKα1 and promoted its mitochondrial translocation, which further inhibited the mitochondrial translocation of ACSL4 via mitophagy and ultimately suppressed mitochondria-associated ferroptosis. Importantly, overexpression of mitochondria-localized AMPKα1 (mitoAα1) shared similar benefits with nicorandil on mitophagy, ferroptosis and cardiovascular protection against diabetic injury. In conclusion, the present study demonstrated the therapeutic effects of nicorandil against cardiac microvascular ferroptosis in DCM and revealed that the mitochondria-localized AMPK-Parkin-ACSL4 signaling pathway mediates mitochondria-associated ferroptosis and the development of cardiac microvascular dysfunction.
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Affiliation(s)
- Zhangwei Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Su Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Muyin Liu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Ming Yin
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Jinxiang Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Youran Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Qiyu Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - You Zhou
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Yan Xia
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Ao Chen
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Danbo Lu
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
| | - Chenguang Li
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China.
| | - Yuqiong Chen
- The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou Municipal Hospital, Gusu School, Nanjing Medical University.
| | - Juying Qian
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China.
| | - Junbo Ge
- Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, National Clinical Research Center for Interventional Medicine, Shanghai 200032, China
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Noda M, Kikuchi C, Hori E, Iwao T, Nagami C, Takeuchi M, Matsunaga T. Effect of Anagliptin on Vascular Injury in the Femoral Artery of Type 2 Diabetic Rats. Biol Pharm Bull 2024; 47:204-212. [PMID: 38246646 DOI: 10.1248/bpb.b23-00706] [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] [Indexed: 01/23/2024]
Abstract
Patients with diabetes mellitus (DM) often experience complications such as peripheral arterial disease (PAD), which is thought to be caused by vascular damage resulting from increased oxidative stress. Dipeptidyl peptidase-4 inhibitors have been reported to reduce oxidative stress, although the exact mechanism remains unclear. This study aimed to investigate the impact of long-term (6 weeks) anagliptin treatment at a dose of 200 mg/kg/d against oxidative stress in the femoral artery of Otsuka Long-Evans Tokushima Fatty (OLETF) rats using a well-established animal model for type 2 DM. Serum toxic advanced glycation end-products concentrations and blood glucose levels after glucose loading were significantly elevated in OLETF rats compared to Long-Evans Tokushima Otsuka (LETO) rats but were significantly suppressed by anagliptin administration. Plasma glucagon-like peptide-1 concentrations after glucose loading were significantly increased in anagliptin-treated rats. Superoxide production and reduced nicotinamide adenine dinucleotide phosphate (NADPH) oxidase activity in femoral arteries were significantly increased in OLETF rats compared to LETO rats but were significantly decreased by anagliptin administration. The expressions of NADPH oxidase components (p22phox in the intima region and p22phox and gp91phox in the media region) in the femoral artery were significantly increased in OLETF rats compared to LETO rats but were significantly suppressed by anagliptin administration. Furthermore, the femoral artery showed increased wall thickness in OLETF rats compared to LETO rats, but anagliptin administration reduced the thickening. This study suggests that long-term anagliptin administration can reduce oxidative stress in femoral arteries and improve vascular injury.
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Affiliation(s)
- Masato Noda
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Chigusa Kikuchi
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Laboratory of Community Medicine, Showa Pharmaceutical University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Eisei Hori
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Takahiro Iwao
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Chie Nagami
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
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Eisen B, Binah O. Modeling Duchenne Muscular Dystrophy Cardiomyopathy with Patients' Induced Pluripotent Stem-Cell-Derived Cardiomyocytes. Int J Mol Sci 2023; 24:ijms24108657. [PMID: 37240001 DOI: 10.3390/ijms24108657] [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: 04/20/2023] [Revised: 05/05/2023] [Accepted: 05/10/2023] [Indexed: 05/28/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X-linked progressive muscle degenerative disease caused by mutations in the dystrophin gene, resulting in death by the end of the third decade of life at the latest. A key aspect of the DMD clinical phenotype is dilated cardiomyopathy, affecting virtually all patients by the end of the second decade of life. Furthermore, despite respiratory complications still being the leading cause of death, with advancements in medical care in recent years, cardiac involvement has become an increasing cause of mortality. Over the years, extensive research has been conducted using different DMD animal models, including the mdx mouse. While these models present certain important similarities to human DMD patients, they also have some differences which pose a challenge to researchers. The development of somatic cell reprograming technology has enabled generation of human induced pluripotent stem cells (hiPSCs) which can be differentiated into different cell types. This technology provides a potentially endless pool of human cells for research. Furthermore, hiPSCs can be generated from patients, thus providing patient-specific cells and enabling research tailored to different mutations. DMD cardiac involvement has been shown in animal models to include changes in gene expression of different proteins, abnormal cellular Ca2+ handling, and other aberrations. To gain a better understanding of the disease mechanisms, it is imperative to validate these findings in human cells. Furthermore, with the recent advancements in gene-editing technology, hiPSCs provide a valuable platform for research and development of new therapies including the possibility of regenerative medicine. In this article, we review the DMD cardiac-related research performed so far using human hiPSCs-derived cardiomyocytes (hiPSC-CMs) carrying DMD mutations.
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Affiliation(s)
- Binyamin Eisen
- Cardiac Research Laboratory, Department of Physiology, Biophysics and Systems Biology, Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
| | - Ofer Binah
- Cardiac Research Laboratory, Department of Physiology, Biophysics and Systems Biology, Rappaport Faculty of Medicine and Research Institute, Technion-Israel Institute of Technology, Haifa 3200003, Israel
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Wrzosek A, Gałecka S, Żochowska M, Olszewska A, Kulawiak B. Alternative Targets for Modulators of Mitochondrial Potassium Channels. Molecules 2022; 27:299. [PMID: 35011530 PMCID: PMC8746388 DOI: 10.3390/molecules27010299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Revised: 12/30/2021] [Accepted: 12/31/2021] [Indexed: 12/17/2022] Open
Abstract
Mitochondrial potassium channels control potassium influx into the mitochondrial matrix and thus regulate mitochondrial membrane potential, volume, respiration, and synthesis of reactive oxygen species (ROS). It has been found that pharmacological activation of mitochondrial potassium channels during ischemia/reperfusion (I/R) injury activates cytoprotective mechanisms resulting in increased cell survival. In cancer cells, the inhibition of these channels leads to increased cell death. Therefore, mitochondrial potassium channels are intriguing targets for the development of new pharmacological strategies. In most cases, however, the substances that modulate the mitochondrial potassium channels have a few alternative targets in the cell. This may result in unexpected or unwanted effects induced by these compounds. In our review, we briefly present the various classes of mitochondrial potassium (mitoK) channels and describe the chemical compounds that modulate their activity. We also describe examples of the multidirectional activity of the activators and inhibitors of mitochondrial potassium channels.
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Affiliation(s)
- Antoni Wrzosek
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw, Poland; (A.W.); (S.G.); (M.Ż.)
| | - Shur Gałecka
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw, Poland; (A.W.); (S.G.); (M.Ż.)
| | - Monika Żochowska
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw, Poland; (A.W.); (S.G.); (M.Ż.)
| | - Anna Olszewska
- Department of Histology, Medical University of Gdansk, 1a Debinki, 80-211 Gdansk, Poland;
| | - Bogusz Kulawiak
- Laboratory of Intracellular Ion Channels, Nencki Institute of Experimental Biology, Polish Academy of Sciences, 02-093 Warsaw, Poland; (A.W.); (S.G.); (M.Ż.)
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Li Z, Lei X, Chen X, Yin Q, Shen J, Yao J. Long-term and combined effects of N-[2-(nitrooxy)ethyl]-3-pyridinecarboxamide and fumaric acid on methane production, rumen fermentation, and lactation performance in dairy goats. J Anim Sci Biotechnol 2021; 12:125. [PMID: 34865657 PMCID: PMC8647438 DOI: 10.1186/s40104-021-00645-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 10/26/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In recent years, nitrooxy compounds have been identified as promising inhibitors of methanogenesis in ruminants. However, when animals receive a nitrooxy compound, a high portion of the spared hydrogen is eructated as gas, which partly offsets the energy savings of CH4 mitigation. The objective of the present study was to evaluate the long-term and combined effects of supplementation with N-[2-(nitrooxy)ethyl]-3-pyridinecarboxamide (NPD), a methanogenesis inhibitor, and fumaric acid (FUM), a hydrogen sink, on enteric CH4 production, rumen fermentation, bacterial populations, apparent nutrient digestibility, and lactation performance of dairy goats. RESULTS Twenty-four primiparous dairy goats were used in a randomized complete block design with a 2 × 2 factorial arrangement of treatments: supplementation without or with FUM (32 g/d) or NPD (0.5 g/d). All samples were collected every 3 weeks during a 12-week feeding experiment. Both FUM and NPD supplementation persistently inhibited CH4 yield (L/kg DMI, by 18.8% and 18.1%, respectively) without negative influence on DMI or apparent nutrient digestibility. When supplemented in combination, no additive CH4 suppression was observed. FUM showed greater responses in increasing the molar proportion of propionate when supplemented with NPD than supplemented alone (by 10.2% vs. 4.4%). The rumen microbiota structure in the animals receiving FUM was different from that of the other animals, particularly changed the structure of phylum Firmicutes. Daily milk production and serum total antioxidant capacity were improved by NPD, but the contents of milk fat and protein were decreased, probably due to the bioactivity of absorbed NPD on body metabolism. CONCLUSIONS Supplementing NPD and FUM in combination is a promising way to persistently inhibit CH4 emissions with a higher rumen propionate proportion. However, the side effects of this nitrooxy compound on animals and its residues in animal products need further evaluation before it can be used as an animal feed additive.
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Affiliation(s)
- Zongjun Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xinjian Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Xiaoxu Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Qingyan Yin
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Jing Shen
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China
| | - Junhu Yao
- College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, China.
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Nayak B P, Minaz N, Pasha K. Molsidomine ameliorates diabetic peripheral neuropathy complications in Wistar rats. Animal Model Exp Med 2021; 4:243-248. [PMID: 34557650 PMCID: PMC8446713 DOI: 10.1002/ame2.12162] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 02/02/2021] [Indexed: 11/10/2022] Open
Abstract
Diabetic neuropathy is a disorder that affects various regions of the nervous system and there is no specific treatment available for it. This study evaluated the protective effect of molsidomine in diabetic neuropathy in rats. Diabetes was induced in male Wistar rats by administrating streptozotocin (52 mg/kg ip). Diabetic rats were treated with molsidomine 5 mg/kg po and 10 mg/kg po. After 8 weeks of treatment, motor coordination, mechanical allodynia, mechanical hyperalgesia, nerve conduction velocity, and glycosylated hemoglobin were assessed. Thereafter, animals were killed and the sciatic nerve was isolated for measurement of reduced glutathione and lipid peroxidation, and histopathological analysis. Treatment with molsidomine significantly improved motor coordination, paw withdrawal threshold, mechanical threshold, and nerve conduction velocity. Furthermore, molsidomine treatment also reduced malondialdehyde levels and prevented depletion of reduced glutathione in the sciatic nerve homogenate. Histopathology revealed that molsidomine treatment maintained normal architecture of the sciatic nerve. The results of our study strengthen the alternative use of molsidomine in diabetic neuropathy.
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Affiliation(s)
- Pranav Nayak B
- Pharmacology Department and Al‐Ameen College of Pharmacy and Rajiv Gandhi UniversityBangaloreIndia
| | - Nathani Minaz
- Pharmacology Department and Al‐Ameen College of Pharmacy and Rajiv Gandhi UniversityBangaloreIndia
| | - Khadar Pasha
- Pharmacology Department and Al‐Ameen College of Pharmacy and Rajiv Gandhi UniversityBangaloreIndia
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Sánchez‐Duarte S, Márquez‐Gamiño S, Montoya‐Pérez R, Villicaña‐Gómez EA, Vera‐Delgado KS, Caudillo‐Cisneros C, Sotelo‐Barroso F, Melchor‐Moreno MT, Sánchez‐Duarte E. Nicorandil decreases oxidative stress in slow- and fast-twitch muscle fibers of diabetic rats by improving the glutathione system functioning. J Diabetes Investig 2021; 12:1152-1161. [PMID: 33503290 PMCID: PMC8264387 DOI: 10.1111/jdi.13513] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 10/20/2020] [Accepted: 01/24/2021] [Indexed: 01/17/2023] Open
Abstract
AIMS/INTRODUCTION Myopathy is a common complication of any diabetes type, consisting in failure to preserve mass and muscular function. Oxidative stress has been considered one of the main causes for this condition. This study aimed to search if Nicorandil, a KATP channel opener, could protect slow- and fast-twitch diabetic rat muscles from oxidative stress, and to unveil its possible mechanisms. MATERIALS AND METHODS Diabetes was induced in male Wistar rats by applying intraperitoneally streptozotocin (STZ) at 100 mg/kg doses. Nicorandil (3 mg/kg/day) was administered along 4 weeks. An insulin tolerance test and assessment of fasting blood glucose (FBG), TBARS, reduced (GSH), and disulfide (GSSG) glutathione levels, GSH/GSSG ratio, and mRNA expression of glutathione metabolism-related genes were performed at end of treatment in soleus and gastrocnemius muscles. RESULTS Nicorandil significantly reduced FBG levels and enhanced insulin tolerance in diabetic rats. In gastrocnemius and soleus muscles, Nicorandil attenuated the oxidative stress by decreasing lipid peroxidation (TBARS), increasing total glutathione and modulating GPX1-mRNA expression in both muscle's types. Nicorandil also increased GSH and GSH/GSSG ratio and downregulated the GCLC- and GSR-mRNA in gastrocnemius, without significative effect on those enzymes' mRNA expression in diabetic soleus muscle. CONCLUSIONS In diabetic rats, Nicorandil attenuates oxidative stress in slow- and fast-twitch skeletal muscles by improving the glutathione system functioning. The underlying mechanisms for the modulation of glutathione redox state and the transcriptional expression of glutathione metabolism-related genes seem to be fiber type-dependent.
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Affiliation(s)
- Sarai Sánchez‐Duarte
- Instituto de Investigaciones Químico‐BiológicasUniversidad Michoacana de San Nicolás de HidalgoMoreliaMichoacánMéxico
| | - Sergio Márquez‐Gamiño
- Departamento de Ciencias Aplicadas al TrabajoUniversidad de Guanajuato Campus LeónLeónGuanajuatoMéxico
| | - Rocío Montoya‐Pérez
- Instituto de Investigaciones Químico‐BiológicasUniversidad Michoacana de San Nicolás de HidalgoMoreliaMichoacánMéxico
| | | | - Karla Susana Vera‐Delgado
- Departamento de Ciencias Aplicadas al TrabajoUniversidad de Guanajuato Campus LeónLeónGuanajuatoMéxico
| | | | - Fernando Sotelo‐Barroso
- Departamento de Ciencias Aplicadas al TrabajoUniversidad de Guanajuato Campus LeónLeónGuanajuatoMéxico
| | - Ma Teresa Melchor‐Moreno
- Departamento de Ciencias Aplicadas al TrabajoUniversidad de Guanajuato Campus LeónLeónGuanajuatoMéxico
| | - Elizabeth Sánchez‐Duarte
- Departamento de Ciencias Aplicadas al TrabajoUniversidad de Guanajuato Campus LeónLeónGuanajuatoMéxico
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Sullivan RT, Lam NT, Haberman M, Beatka MJ, Afzal MZ, Lawlor MW, Strande JL. Cardioprotective effect of nicorandil on isoproterenol induced cardiomyopathy in the Mdx mouse model. BMC Cardiovasc Disord 2021; 21:302. [PMID: 34130633 PMCID: PMC8207777 DOI: 10.1186/s12872-021-02112-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 06/07/2021] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) associated cardiomyopathy is a major cause of morbidity and mortality. In an in vitro DMD cardiomyocyte model, nicorandil reversed stress-induced cell injury through multiple pathways implicated in DMD. We aimed to test the efficacy of nicorandil on the progression of cardiomyopathy in mdx mice following a 10-day treatment protocol. METHODS A subset of mdx mice was subjected to low-dose isoproterenol injections over 5 days to induce a cardiac phenotype and treated with vehicle or nicorandil for 10 days. Baseline and day 10 echocardiograms were obtained to assess cardiac function. At 10 days, cardiac tissue was harvested for further analysis, which included histologic analysis and assessment of oxidative stress. Paired student's t test was used for in group comparison, and ANOVA was used for multiple group comparisons. RESULTS Compared to vehicle treated mice, isoproterenol decreased ejection fraction and fractional shortening on echocardiogram. Nicorandil prevented isoproterenol induced cardiac dysfunction. Isoproterenol increased cardiac fibrosis, which nicorandil prevented. Isoproterenol increased gene expression of NADPH oxidase, which decreased to baseline with nicorandil treatment. Superoxide dismutase 2 protein expression increased in those treated with nicorandil, and xanthine oxidase activity decreased in mice treated with nicorandil during isoproterenol stress compared to all other groups. CONCLUSIONS In conclusion, nicorandil is cardioprotective in mdx mice and warrants continued investigation as a therapy for DMD associated cardiomyopathy.
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Affiliation(s)
- Rachel T Sullivan
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA.
| | - Ngoc T Lam
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Margaret Haberman
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Margaret J Beatka
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Muhammad Z Afzal
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Michael W Lawlor
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
| | - Jennifer L Strande
- Medical College of Wisconsin, 8701 W Watertown Plank Rd, Milwaukee, WI, 53226, USA
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Lan Y, Yang X, Liang Y, Lei L, Li Y, Wang S. Vasomotor tone-associated factors and pregnancy outcomes of women who undergo in vitro fertilization. Growth Factors 2021; 39:28-36. [PMID: 34969347 DOI: 10.1080/08977194.2021.2021899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Vasomotor tone-associated factors play important roles in normal pregnancy, but their roles in the pregnancy outcome of women who undergo in vitro fertilization and embryo transfer (IVF-ET) remain unclear. A total of 82 infertile women who underwent successful IVF-ET were enrolled, including 18 pregnancy losses, 11 complications, and 53 normal deliveries. The serum NO and iNOS levels were significantly higher in the pregnancy loss group and significantly lower in the complication group than in the normal delivery group (p < 0.05). Significantly increased ET-1 and decreased PGI2 were found in both the pregnancy loss and complication groups compared with those in the normal delivery group (p < 0.05). NO, iNOS, and ET-1 are risk factors and PGI2 is a protective factor for pregnancy loss. ET-1 + PGI2 (AUC, 0.897; sensitivity, 90.6%; specificity, 83.3%) showed a relatively good predictive value for pregnancy loss following IVF-ET.
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Affiliation(s)
- Yonglian Lan
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Xiaokui Yang
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Yu Liang
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Lingling Lei
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Ying Li
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
| | - Shuyu Wang
- Department of Human Reproductive Medicine, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing, China
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Bilayer nicorandil-loaded small-diameter vascular grafts improve endothelial cell function via PI3K/AKT/eNOS pathway. Biodes Manuf 2020. [DOI: 10.1007/s42242-020-00107-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abdelzaher WY, Khalaf HM, El-Hussieny M, Bayoumi A, Shehata S, Refaie M. Role of nitric oxide donor in methotrexate-induced testicular injury via modulation of pro-inflammatory mediators, eNOS and P-glycoprotein. Hum Exp Toxicol 2020; 39:1700-1709. [PMID: 32666843 DOI: 10.1177/0960327120940361] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Methotrexate (MTX) is a widely used chemotherapeutic agent but its clinical use is challenged with different forms of toxicities including testicular injury. The aim of the current study was to evaluate the potential protective effect of potassium channel opener, nicorandil (NIC) (3 and 10 mg/kg/day) on MTX-induced testicular injury in a rat model. Rats were randomly divided into four groups (nine rats each) and treated for 2 weeks as follows: (I) normal control (CON group) received vehicle, (II) model group (MTX group) given MTX (20 mg/kg) single intraperitoneal (i.p.) injection dose on 11th day, (III) MTX + NLD group treated with NIC (3 mg/kg/day) orally for 2 weeks and MTX (20 mg/kg) single i.p. dose on 11th day, and (IV) MTX + NHD group treated with NIC (10 mg/kg/day) orally for 2 weeks and MTX (20 mg/kg) single i.p. injection on the 11th day. The testicular injury was assessed biochemically via serum testosterone, total antioxidant capacity, testicular oxidative stress parameters, P-glycoprotein, tumor necrosis factor-alpha, and interleukin-1β. Furthermore, histopathological evaluation, endothelial nitric oxide synthase (eNOS) immunoexpression, and detection of p53 expression level using Western blotting were performed. Results showed that MTX induced testicular injury which was proved by both biochemical and histopathological evaluations. Our results concluded that NIC pretreatment attenuated MTX-induced testicular injury via significantly increased eNOS immunoexpression, antiapoptotic, anti-inflammatory, and antioxidant properties. Interestingly, NIC high dose is more protective than low dose.
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Affiliation(s)
- W Y Abdelzaher
- Department of Pharmacology, Faculty of Medicine, 68877Minia University, Minia, Egypt
| | - H M Khalaf
- Department of Pharmacology, Faculty of Medicine, 68877Minia University, Minia, Egypt
| | - M El-Hussieny
- Department of Pathology, Faculty of Medicine, 68877Minia University, Minia, Egypt
| | - Ama Bayoumi
- Department of Biochemistry, Faculty of Pharmacy, 68877Minia University, Minia, Egypt
| | - S Shehata
- Department of Cardiology, Faculty of Medicine, 68877Minia University, Minia, Egypt
| | - Mmm Refaie
- Department of Pharmacology, Faculty of Medicine, 68877Minia University, Minia, Egypt
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Sánchez-Duarte E, Cortés-Rojo C, Sánchez-Briones LA, Campos-García J, Saavedra-Molina A, Delgado-Enciso I, López-Lemus UA, Montoya-Pérez R. Nicorandil Affects Mitochondrial Respiratory Chain Function by Increasing Complex III Activity and ROS Production in Skeletal Muscle Mitochondria. J Membr Biol 2020; 253:309-318. [PMID: 32620983 DOI: 10.1007/s00232-020-00129-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 06/23/2020] [Indexed: 12/15/2022]
Abstract
Adenosine triphosphate (ATP)-dependent potassium channels openers (KATP) protect skeletal muscle against function impairment through the activation of the mitochondrial KATP channels (mitoKATP). Previous reports suggest that modulators of the mitochondrial KATP channels have additional effects on isolated mitochondria. To determine whether the KATP channel opener nicorandil has non-specific effects that explain its protective effect through the mitochondrial function, chicken muscle mitochondria were isolated, and respiration rate was determined pollarographically. The activity of the electron transport chain (ETC) complexes (I-IV) was measured using a spectrophotometric method. Reactive oxygen species (ROS) levels and lipid peroxidation were assessed using flow cytometry and thiobarbituric acid assay, respectively. Both KATP channel opener nicorandil and KATP channel blocker 5-hydroxydecanoate (5-HD) decreased mitochondrial respiration; nicorandil increased complex III activity and decreased complex IV activity. The effects of nicorandil on complex III were antagonized by 5-HD. Nicorandil increased ROS levels, effect reverted by either 5-HD or the antioxidant N-2-mercaptopropionyl glycine (MPG). None of these drugs affected lipid peroxidation levels. These findings suggest that KATP channel opener nicorandil increases mitochondrial ROS production from complex III. This results by partially blocking electron flow in the complex IV, setting electron carriers in a more reduced state, which is favored by the increase in complex III activity by nicorandil. Overall, our study showed that nicorandil like other mitochondrial KATP channel openers might not act through mitoKATP channel activation.
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Affiliation(s)
- E Sánchez-Duarte
- Departamento de Ciencias Aplicadas al Trabajo, Universidad de Guanajuato Campus León, Eugenio Garza Sada 572, Lomas del Campestre Sección 2, 37150, León, Guanajuato, Mexico
| | - C Cortés-Rojo
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Francisco J. Múgica S/N, Col. Felicitas del Río, 58030, Morelia, Michoacán, Mexico
| | - L A Sánchez-Briones
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Francisco J. Múgica S/N, Col. Felicitas del Río, 58030, Morelia, Michoacán, Mexico
| | - J Campos-García
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Francisco J. Múgica S/N, Col. Felicitas del Río, 58030, Morelia, Michoacán, Mexico
| | - A Saavedra-Molina
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Francisco J. Múgica S/N, Col. Felicitas del Río, 58030, Morelia, Michoacán, Mexico
| | - I Delgado-Enciso
- Facultad de Medicina, Universidad de Colima, Av. Universidad 333. Las Víboras, 28040, Colima, Colima, Mexico
| | - U A López-Lemus
- Center for Biodefense and Global Infectious Diseases, 28078, Colima, Colima, Mexico
| | - R Montoya-Pérez
- Instituto de Investigaciones Químico-Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Francisco J. Múgica S/N, Col. Felicitas del Río, 58030, Morelia, Michoacán, Mexico.
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Nicorandil Attenuates LPS-Induced Acute Lung Injury by Pulmonary Endothelial Cell Protection via NF- κB and MAPK Pathways. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:4957646. [PMID: 30984337 PMCID: PMC6431468 DOI: 10.1155/2019/4957646] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 11/04/2018] [Accepted: 11/28/2018] [Indexed: 01/06/2023]
Abstract
Acute lung injury (ALI) is a devastating critical disease characterized by diffuse inflammation and endothelial dysfunction. Increasing evidence, including from our laboratory, has revealed that the opening of ATP-sensitive potassium (KATP) channels has promising anti-inflammation and endothelial protection activities in various disorders. However, the impacts of KATP channels on ALI remain obscure. In this study, we used nicorandil (Nico), a classic KATP channel opener, to investigate whether opening of KATP channels could alleviate ALI with an emphasis on human pulmonary artery endothelial cell (HPAEC) modulation. The results showed that Nico inhibited lipopolysaccharide- (LPS-) induced inflammatory response, protein accumulation, myeloperoxidase activity, and endothelial injury. In vitro, Nico reduced LPS-induced HPAEC apoptosis and the expression of cleaved-caspase-3, caspase-9, and CCAAT/enhancer-binding protein homologous protein (CHOP). Additionally, Nico inhibited inflammation by suppressing monocyte-endothelial adhesion and decreasing the expression of proinflammatory proteins. Moreover, Nico restored the expression and the distribution of adherens junction vascular endothelial- (VE-) cadherin. Further, Nico abolished the increase in intracellular reactive oxygen species (ROS) and the activation of NF-κB and mitogen-activated protein kinase (MAPK) in HPAECs. Glibenclamide (Gli), a nonselective KATP channel blocker, abrogated the effects of Nico, implying that opening of KATP channels contributes to the relief of ALI. Together, our findings indicated that Nico alleviated LPS-induced ALI by protecting ECs function via preventing apoptosis, suppressing endothelial inflammation and reducing oxidative stress, which may be attributed to the inhibition of NF-κB and MAPK signaling pathways.
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Daiber A, Xia N, Steven S, Oelze M, Hanf A, Kröller-Schön S, Münzel T, Li H. New Therapeutic Implications of Endothelial Nitric Oxide Synthase (eNOS) Function/Dysfunction in Cardiovascular Disease. Int J Mol Sci 2019; 20:ijms20010187. [PMID: 30621010 PMCID: PMC6337296 DOI: 10.3390/ijms20010187] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 12/27/2018] [Accepted: 12/28/2018] [Indexed: 02/07/2023] Open
Abstract
The Global Burden of Disease Study identified cardiovascular risk factors as leading causes of global deaths and life years lost. Endothelial dysfunction represents a pathomechanism that is associated with most of these risk factors and stressors, and represents an early (subclinical) marker/predictor of atherosclerosis. Oxidative stress is a trigger of endothelial dysfunction and it is a hall-mark of cardiovascular diseases and of the risk factors/stressors that are responsible for their initiation. Endothelial function is largely based on endothelial nitric oxide synthase (eNOS) function and activity. Likewise, oxidative stress can lead to the loss of eNOS activity or even “uncoupling” of the enzyme by adverse regulation of well-defined “redox switches” in eNOS itself or up-/down-stream signaling molecules. Of note, not only eNOS function and activity in the endothelium are essential for vascular integrity and homeostasis, but also eNOS in perivascular adipose tissue plays an important role for these processes. Accordingly, eNOS protein represents an attractive therapeutic target that, so far, was not pharmacologically exploited. With our present work, we want to provide an overview on recent advances and future therapeutic strategies that could be used to target eNOS activity and function in cardiovascular (and other) diseases, including life style changes and epigenetic modulations. We highlight the redox-regulatory mechanisms in eNOS function and up- and down-stream signaling pathways (e.g., tetrahydrobiopterin metabolism and soluble guanylyl cyclase/cGMP pathway) and their potential pharmacological exploitation.
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Affiliation(s)
- Andreas Daiber
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, 55131 Mainz, Germany.
| | - Ning Xia
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
| | - Sebastian Steven
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
| | - Matthias Oelze
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
| | - Alina Hanf
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
| | - Swenja Kröller-Schön
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
| | - Thomas Münzel
- Center for Cardiology, Cardiology I-Laboratory of Molecular Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
- German Center for Cardiovascular Research (DZHK), Partner Site Rhine-Main, 55131 Mainz, Germany.
| | - Huige Li
- Department of Pharmacology, University Medical Center of the Johannes Gutenberg-University Mainz, 55131 Mainz, Germany.
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Zhang M, Zhang H, Liu C, Li X, Ling M, Wang Z, Xing Y. Myocardial Protective Effects of Nicorandil on Rats with Type 2 Diabetic Cardiomyopathy. Med Sci Monit Basic Res 2018; 24:141-145. [PMID: 30262799 PMCID: PMC6178877 DOI: 10.12659/msmbr.910974] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Background Diabetic cardiomyopathy (DCM) is a common but underestimated cause of heart failure in patients with diabetes. This study investigated the myocardial-protective effects of nicorandil (Nic) on rats with DCM. Material/Methods A total of forty-seven 180–220 g male Wistar rats were randomly divided into 4 groups: a control group (control, n=8), a DCM group (DCM, n=13), a nicorandil-pretreated DCM group (Nic1, n=13), and a nicorandil-treated DCM group (Nic2, n=13). A rat model of type 2 diabetes was induced by high-fat and high-sugar diet and intraperitoneal injection of streptozotocin (STZ). Nicorandil (3 mg/kg/d) was orally administrated to rats in the Nic1 group starting at week 4. Nicorandil (3 mg/kg/d) was orally administrated only after the induction of diabetes in the Nic2 group. The serum lipoids, plasma glucose, insulin levels, heart weight index, serum creatine kinase (CK), lactate dehydrogenase (LDH) levels, superoxide dismutase (SOD) activity, and malondialdehyde (MDA) were analyzed in all groups. Results The DCM group showed increased heart weight index, serum LDH, CK, and MDA content and decreased serum SOD activity, as compared with the control group (P<0.05). The DCM-induced increases in heart weight index, serum LDH, CK, and MDA content and decrease in serum SOD activity were attenuated in both Nic1 and Nic2 groups (P<0.05). However, there was no significant difference between Nic1 and Nic2 groups (P>0.05). Conclusions Nicorandil has protective effects on cardiac hypertrophy in DCM rats through increased SOD activity and decreased MDA content. Therefore, nicorandil may be a therapeutic method for diabetic patients with DCM.
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Affiliation(s)
- Meng Zhang
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| | - Huizhen Zhang
- Department of Cardiology, The First People's Hospital of Jinan, Jinan, Shandong, China (mainland)
| | - Chun Liu
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| | - Xuehui Li
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| | - Mingying Ling
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| | - Zhihao Wang
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
| | - Yanqiu Xing
- Department of Geriatric Medicine, Qilu Hospital of Shandong University, Jinan, Shandong, China (mainland)
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Choi J, Kim R, Kim J, Jeong W, Park SW, Lee HW, Chung HY. Nicorandil reduces burn wound progression by enhancing skin blood flow. J Plast Reconstr Aesthet Surg 2018; 71:1196-1206. [DOI: 10.1016/j.bjps.2018.03.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 03/10/2018] [Accepted: 03/30/2018] [Indexed: 10/17/2022]
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Simonovic N, Jakovljevic V, Jeremic J, Finderle Z, Srejovic I, Nikolic Turnic T, Milosavljevic I, Zivkovic V. Comparative effects of calcium and potassium channel modulators on ischemia/reperfusion injury in the isolated rat heart. Mol Cell Biochem 2018; 450:175-185. [DOI: 10.1007/s11010-018-3384-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 06/16/2018] [Indexed: 12/28/2022]
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Mohamed YS, Ahmed LA, Salem HA, Agha AM. Role of nitric oxide and KATP channel in the protective effect mediated by nicorandil in bile duct ligation-induced liver fibrosis in rats. Biochem Pharmacol 2018. [DOI: 10.1016/j.bcp.2018.03.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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颜 文, 张 纯, 邢 通, 宫 雪, 杨 宇, 李 亦, 刘 玄, 阿依江·加马力丁, 郁 叶, 张 萌, 陈 莉. [Nicorandil improves cognitive dysfunction in mice with streptozotocin-induced diabetes]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2018; 38:384-389. [PMID: 29735436 PMCID: PMC6765662 DOI: 10.3969/j.issn.1673-4254.2018.04.03] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Indexed: 10/07/2023]
Abstract
OBJECTIVE To observe the protective effects of potassium channel opener nicorandil against cognitive dysfunction in mice with streptozotocin (STZ)-induced diabetes. METHODS C57BL/6J mouse models of type 1 diabetes mellitus (T1DM) were established by intraperitoneal injection of STZ and received daily treatment with intragastric administration of nicorandil or saline (model group) for 4 consecutive weeks, with normal C57BL/6J mice serving as control. Fasting blood glucose level was recorded every week and Morris water maze was used to evaluate the cognitive behavior of the mice in the 4th week. At the end of the experiment, the mice were sacrificed to observe the ultrastructural changes in the hippocampus and pancreas under transmission electron microscopy; the contents of glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) in the hippocampus and SOD activity and MDA level in the brain tissue were determined. RESULTS Compared with the control group, the model group showed significantly increased fasting blood glucose (P<0.001), significantly prolonged escape latency (P<0.05) and increased swimming distance (P<0.01) with ultrastructural damage of pancreatic β cells and in the hippocampus; GIP and GLP-1 contents in the hippocampus (P<0.01) and SOD activity in the brain were significantly decreased (P<0.05) and MDA content was significantly increased in the model group (P<0.05). Compared with the model group, nicorandil treatment did not cause significant changes in fasting blood glucose, but significantly reduced the swimming distance (P<0.05); nicorandil did not improve the ultrastructural changes in pancreatic β cells but obviously improved the ultrastructures of hippocampal neurons and synapses. Nicorandil also significantly increased the contents of GIP and GLP-1 in the hippocampus (P<0.05), enhanced SOD activity (P<0.05) and decreased MDA level (P<0.01) in the brain tissue. CONCLUSION Nicorandil improves cognitive dysfunction in mice with STZ-induced diabetes by increasing GIP and GLP-1 contents in the hippocampus and promoting antioxidation to relieve hippocampal injury.
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Affiliation(s)
- 文慧 颜
- 西安交通大学医学部 基础医学院药理学系 陕西 西安 710061Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 纯茜 张
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 通 邢
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 雪 宫
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 宇轩 杨
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 亦诺 李
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 玄 刘
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 阿依江·加马力丁
- 西安交通大学医学部 临床医学系,陕西 西安 710061Department of Clinical Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 叶 郁
- 西安交通大学医学部 基础医学院药理学系 陕西 西安 710061Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 萌 张
- 西安交通大学医学部 基础医学院药理学系 陕西 西安 710061Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - 莉娜 陈
- 西安交通大学医学部 基础医学院药理学系 陕西 西安 710061Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
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He W, Su Q, Liang J, Sun Y, Wang X, Li L. The protective effect of nicorandil on cardiomyocyte apoptosis after coronary microembolization by activating Nrf2/HO-1 signaling pathway in rats. Biochem Biophys Res Commun 2018; 496:1296-1301. [PMID: 29412163 DOI: 10.1016/j.bbrc.2018.02.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 02/01/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Myocardial apoptosis is considered to be the chief cause of progressive cardiac dysfunction induced by coronary microembolization (CME), and the Nrf2/HO-1 signaling pathway is involved in CME-induced myocardial apoptosis. Nicorandil (NIC) has multiple beneficial cardiovascular effects on myocardial injury. Therefore, this study was undertaken to analyze the role of NIC pretreatment in the inhibiting myocardial apoptosis after CME in rats. METHODS Forty rats were divided into Sham group, CME group, CME plus NIC (NIC) group, and CME plus AAV9-Nrf2 (AAV9-Nrf2) group (n = 10 per group). CME-induced myocardial apoptosis model was established through injecting plastic microspheres (42 μM) into the left ventricle except the Sham group. NIC group received nicorandil 3 mg/(kg.d) for 7 days before the operation. Cardiac function was assessed by echocardiography. The mRNA expression level of Nrf2 was detected by RT-PCR. The protein expression levels of Nrf2, HO-1, Bcl-2, Bax and cleaved caspase-3 were detected by Western blot. The size of the microinfarction area was measured by HBFP staining; myocardial apoptosis was analyzed by TUNEL staining. RESULTS Compared with the sham group, the cardiac function and the expression level of Nrf2, HO-1 and Bcl-2were decreased, while myocardial apoptosis and the expression of Bax and cleaved caspase-3 were increased in the CME group. Compared with the CME group, cardiac function was significantly improved, the expression levels of Nrf2, HO-1, and Bcl-2 were increased, the expression of Bax and cleaved caspase-3 were decreased, and the myocardial apoptosis was attenuated in the NIC group and AAV9-Nrf2 group. CONCLUSION NIC pretreatment effectively inhibit CME-induced myocardial apoptosis and improve cardiac function. The protective effects are mediated through the activation of the Nrf2/HO-1 signaling in cardiomyocytes.
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Affiliation(s)
- Wenkai He
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.
| | - Qiang Su
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Jiabao Liang
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Yuhan Sun
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Xiantao Wang
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China
| | - Lang Li
- Department of Cardiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, Guangxi, China.
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21
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Hori E, Kikuchi C, Nagami C, Kajikuri J, Itoh T, Takeuchi M, Matsunaga T. Role of Glyceraldehyde-Derived AGEs and Mitochondria in Superoxide Production in Femoral Artery of OLETF Rat and Effects of Pravastatin. Biol Pharm Bull 2017; 40:1903-1908. [PMID: 28835584 DOI: 10.1248/bpb.b17-00411] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A complication of diabetes mellitus is the over-production of vascular superoxides, which contribute to the development of arteriosclerosis and peripheral arterial disease (PAD). Hyperglycemia induces the formation and accumulation of advanced glycation end-products (AGEs), which in turn stimulate vascular superoxide production. The mechanism underlying AGE-mediated vascular superoxide production remains to be clarified in lower limb complications associated with diabetes. In the present study, we investigated the role of AGEs and the mitochondrial respiratory complex in superoxide production in femoral arteries using the type 2 diabetes model Otsuka Long-Evans Tokushima Fatty (OLETF) rats [vs. non-diabetic Long-Evans Tokushima Otsuka (LETO) rats]. The effects of in vivo administration of pravastatin on superoxide production in femoral arteries were also examined. Using chemiluminescent assays, luminescence microscopy, and competitive enzyme-linked immunosorbent assay (ELISA), we determined that vascular superoxide production and serum glyceraldehyde-derived AGEs (Glycer-AGEs) increased in OLETF rats. Pravastatin inhibited these responses without changing serum total cholesterol concentrations. The mitochondrial complex II inhibitor thenoyltrifluoroacetone (TTFA) also inhibited vascular superoxide production. Application of Glycer-AGEs in situ increased superoxide production in the vascular wall of femoral arteries from pravastatin-treated OLETF rats, which was then inhibited by TTFA. These results suggest that hyperglycemia increases serum Glycer-AGEs, which subsequently induce superoxide production in the femoral artery of OLETF rats in a mitochondrial complex II-dependent manner. Collectively, our results have partially elucidated the pathological mechanisms leading to diabetes-related PAD, and indicate dual beneficial actions of pravastatin for the prevention of oxidative damage to the vascular wall.
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Affiliation(s)
- Eisei Hori
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University
| | - Chigusa Kikuchi
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University.,Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Chie Nagami
- Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
| | - Junko Kajikuri
- Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University
| | - Takeo Itoh
- Department of Pharmacology, Graduate School of Medical Sciences, Nagoya City University
| | - Masayoshi Takeuchi
- Department of Advanced Medicine, Medical Research Institute, Kanazawa Medical University
| | - Tamihide Matsunaga
- Department of Clinical Pharmacy, Graduate School of Pharmaceutical Sciences, Nagoya City University.,Educational Research Center for Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Nagoya City University
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Macías Pérez ME, Hernández Rodríguez M, Cabrera Pérez LC, Fragoso-Vázquez MJ, Correa-Basurto J, Padilla-Martínez II, Méndez Luna D, Mera Jiménez E, Flores Sandoval C, Tamay Cach F, Rosales-Hernández MC. Aromatic Regions Govern the Recognition of NADPH Oxidase Inhibitors as Diapocynin and its Analogues. Arch Pharm (Weinheim) 2017; 350. [PMID: 28833480 DOI: 10.1002/ardp.201700041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 07/20/2017] [Accepted: 07/21/2017] [Indexed: 01/04/2023]
Abstract
Oxidative stress is related to the pathogenesis and progress of several human diseases. NADPH oxidase (NOX), and mainly the NOX2 isoform, produces superoxide anions (O2•- ). To date, it is known that NOX2 can be inhibited by preventing the assembly of its subunits, p47phox and p22phox. In this work, we analyzed the binding to NOX2 of the apocynin dimer, diapocynin (C1), a known NOX2 inhibitor, and of 18 designed compounds (C2-C19) which have chemical relationships to C1, by in silico methods employing a p47phox structure from the Protein Data Bank (PDB code: 1WLP). C1 and six of the designed compounds were recognized in the region where p22phox binds to p47phox and makes π-π interactions principally with W193, W263, and Y279, which form an aromatic-rich region. C8 was chosen as the best compound according to the in silico studies and was synthesized and evaluated in vitro. C8 was able to prevent the production of reactive oxygen species (ROS) similar to C1. In conclusion, targeting the aromatic region of p47phox through π-interactions is important for inhibiting NOX activity.
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Affiliation(s)
- Martha E Macías Pérez
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - Maricarmen Hernández Rodríguez
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México.,Laboratorio de Modelado Molecular y Diseño de Fármacos, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - Laura C Cabrera Pérez
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - M Jonathan Fragoso-Vázquez
- Departamento de Química Orgánica, Escuela Nacional de Ciencias Biológicas del Instituto Politécnico Nacional, Ciudad de México, México
| | - José Correa-Basurto
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México.,Laboratorio de Modelado Molecular y Diseño de Fármacos, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - Itzia I Padilla-Martínez
- Unidad Profesional Interdisciplinaria de Biotecnología, Instituto Politécnico Nacional, Ciudad de México, México
| | - David Méndez Luna
- Laboratorio de Modelado Molecular y Diseño de Fármacos, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - Elvia Mera Jiménez
- Laboratorio de Cultivo Celular de la Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - César Flores Sandoval
- Gerencia de Desarrollo de Materiales y Productos Químicos, Instituto Mexicano del Petróleo, Eje Central (Lázaro Cárdenas), Ciudad de México, México
| | - Feliciano Tamay Cach
- Laboratorio de Investigación de Bioquímica, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
| | - Martha C Rosales-Hernández
- Laboratorio de Biofísica y Biocatálisis, Sección de Estudios de Posgrado e Investigación de la Escuela Superior de Medicina del Instituto Politécnico Nacional, Ciudad de México, México
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Doxorubicin-induced oxidative stress: The protective effect of nicorandil on HL-1 cardiomyocytes. PLoS One 2017; 12:e0172803. [PMID: 28245258 PMCID: PMC5330507 DOI: 10.1371/journal.pone.0172803] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 02/09/2017] [Indexed: 01/06/2023] Open
Abstract
The primary cardiotoxic action of doxorubicin when used as antitumor drug is attributed to the generation of reactive oxygen species (ROS) therefore effective cardioprotection therapies are needed. In this sense, the antianginal drug nicorandil has been shown to be effective in cardioprotection from ischemic conditions but the underlying molecular mechanism to cope with doxorubicin-induced ROS is unclear. Our in vitro study using the HL-1 cardiomyocyte cell line derived from mouse atria reveals that the endogenous nitric oxide (NO) production was stimulated by nicorandil and arrested by NO synthase inhibition. Moreover, while the NO synthase activity was inhibited by doxorubicin-induced ROS, the NO synthase inhibition did not affect doxorubicin-induced ROS. The inhibition of NO synthase activity by doxorubicin was totally prevented by preincubation with nicorandil. Nicorandil also concentration-dependently (10 to 100 μM) decreased doxorubicin-induced ROS and the effect was antagonized by 5-hydroxydecanoate. The inhibition profile of doxorubicin-induced ROS by nicorandil was unaltered when an L-arginine derivative or a protein kinase G inhibitor was present. Preincubation with pinacidil mimicked the effect of nicorandil and the protection was eliminated by glibenclamide. Quantitative colocalization of fluorescence indicated that the mitochondrion was the target organelle of nicorandil and the observed response was a decrease in the mitochondrial inner membrane potential. Interference with H+ movement across the mitochondrial inner membrane, leading to depolarization, also protected from doxorubicin-induced ROS. The data indicate that activation of the mitochondrial ATP-sensitive K+ channel by nicorandil causing mitochondrial depolarization, without participation of the NO donor activity, was responsible for inhibition of the mitochondrial NADPH oxidase that is the main contributor to ROS production in cardiomyocytes. Impairment of the cytosolic Ca2+ signal induced by caffeine and the increase in lipid peroxidation, both of which are indicators of doxorubicin-induced oxidative stress, were also prevented by nicorandil.
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24
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Tare M, Kalidindi RSR, Bubb KJ, Parkington HC, Boon WM, Li X, Sobey CG, Drummond GR, Ritchie RH, Kemp-Harper BK. Vasoactive actions of nitroxyl (HNO) are preserved in resistance arteries in diabetes. Naunyn Schmiedebergs Arch Pharmacol 2017; 390:397-408. [PMID: 28074232 DOI: 10.1007/s00210-016-1336-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Accepted: 12/27/2016] [Indexed: 10/20/2022]
Abstract
Endothelial dysfunction is a major risk factor for the vascular complications of diabetes. Increased reactive oxygen species (ROS) generation, a hallmark of diabetes, reduces the bioavailability of endothelial vasodilators, including nitric oxide (NO·). The vascular endothelium also produces the one electron reduced and protonated form of NO·, nitroxyl (HNO). Unlike NO·, HNO is resistant to scavenging by superoxide anions (·O2─). The fate of HNO in resistance arteries in diabetes is unknown. We tested the hypothesis that the vasodilator actions of endogenous and exogenous HNO are preserved in resistance arteries in diabetes. We investigated the actions of HNO in small arteries from the mesenteric and femoral beds as they exhibit marked differences in endothelial vasodilator function following 8 weeks of streptozotocin (STZ)-induced diabetes mellitus. Vascular reactivity was assessed using wire myography and ·O2─ generation using lucigenin-enhanced chemiluminescence. The HNO donor, Angeli's salt, and the NO· donor, DEA/NO, evoked relaxations in both arteries of control rats, and these responses were unaffected by diabetes. Nox2 oxidase expression and ·O2─ generation were upregulated in mesenteric, but unchanged, in femoral arteries of diabetic rats. Acetylcholine-induced endothelium-dependent relaxation was impaired in mesenteric but not femoral arteries in diabetes. The HNO scavenger, L-cysteine, reduced this endothelium-dependent relaxation to a similar extent in femoral and mesenteric arteries from control and diabetic animals. In conclusion, HNO and NO· contribute to the NO synthase (NOS)-sensitive component of endothelium-dependent relaxation in mesenteric and femoral arteries. The role of HNO is sustained in diabetes, serving to maintain endothelium-dependent relaxation.
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Affiliation(s)
- Marianne Tare
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, VIC, 3800, Australia.,Monash Rural Health, Monash University, Churchill, VIC, Australia
| | - Rushita S R Kalidindi
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, VIC, 3800, Australia
| | - Kristen J Bubb
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, VIC, 3800, Australia.,Kolling Institute, Royal North Shore Hospital, St Leonards, NSW, Australia
| | - Helena C Parkington
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, VIC, 3800, Australia
| | - Wee-Ming Boon
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, VIC, 3800, Australia
| | - Xiang Li
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, VIC, 3800, Australia
| | - Christopher G Sobey
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, VIC, 3800, Australia
| | - Grant R Drummond
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, VIC, 3800, Australia
| | - Rebecca H Ritchie
- Baker IDI Heart and Diabetes Institute, Melbourne, VIC, Australia.,Department of Medicine, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Barbara K Kemp-Harper
- Cardiovascular Disease Program, Biomedicine Discovery Institute, Department of Pharmacology, Monash University, Melbourne, VIC, 3800, Australia.
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25
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Serizawa K, Yogo K, Tashiro Y, Kawasaki R, Endo K, Shimonaka Y, Hirata M. Epoetin beta pegol ameliorates flow-mediated dilation with improving endothelial nitric oxide synthase coupling state in nonobese diabetic rats. Cardiovasc Ther 2017; 35. [PMID: 28054454 PMCID: PMC5363236 DOI: 10.1111/1755-5922.12250] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Background/Aims Patients with diabetic nephropathy have a high cardiovascular mortality. Epoetin beta pegol (continuous erythropoietin receptor activator, C.E.R.A.) is a drug for the treatment of renal anemia. In this study, we investigated the effect of C.E.R.A. on vascular endothelial function as evaluated by flow‐mediated dilation (FMD) and the relationship between hematopoiesis and FMD in diabetic nephropathy rats. Methods Male Spontaneously Diabetic Torii rats (SDT, 22 weeks old) were used. C.E.R.A. (0.6, 1.2 μg/kg) was administered subcutaneously once every 2 weeks for 8 weeks. At 1 week after last administration (31 weeks old), we assessed FMD in the femoral arteries of anesthetized rats using a high‐resolution ultrasound system. FMD was also measured 1 week after single C.E.R.A. treatment (5.0 μg/kg) to examine the influence of hematopoiesis. Results Flow‐mediated dilation was significantly decreased in SDT rats before the start of C.E.R.A. treatment (22 weeks old). Repeated administration of C.E.R.A. dose‐dependently improved FMD in SDT rats (31 weeks old) without changing blood glucose, nitroglycerin‐induced vasodilation, or kidney function. Long‐term administration of C.E.R.A. improved the state of endothelial nitric oxide synthase uncoupling in the femoral arteries of SDT rats, which showed a positive correlation with FMD. On the other hand, there was no correlation between FMD and Hb or Hct in SDT rats. Furthermore, at 1 week after single administration of C.E.R.A., FMD was not significantly improved although hemoglobin levels were comparable with levels following long‐term C.E.R.A. treatment. Conclusion Long‐term treatment with C.E.R.A. improved FMD in SDT rats even after onset of endothelial dysfunction.
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Affiliation(s)
- Kenichi Serizawa
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan
| | - Kenji Yogo
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan
| | - Yoshihito Tashiro
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Kanagawa, Japan
| | - Ryohei Kawasaki
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Kanagawa, Japan
| | - Koichi Endo
- Medical Science Department, Chugai Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Yasushi Shimonaka
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Kanagawa, Japan
| | - Michinori Hirata
- Product Research Department, Chugai Pharmaceutical Co., Ltd, Kanagawa, Japan
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26
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Sánchez-Duarte E, Trujillo X, Cortés-Rojo C, Saavedra-Molina A, Camargo G, Hernández L, Huerta M, Montoya-Pérez R. Nicorandil improves post-fatigue tension in slow skeletal muscle fibers by modulating glutathione redox state. J Bioenerg Biomembr 2017; 49:159-170. [DOI: 10.1007/s10863-016-9692-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 12/20/2016] [Indexed: 11/30/2022]
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27
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Jiang J, Li Y, Zhou Y, Li X, Li H, Tang B, Dai X, Ma T, Li L, Huo Y. Oral nicorandil reduces ischemic attacks in patients with stable angina: A prospective, multicenter, open-label, randomized, controlled study. Int J Cardiol 2016; 224:183-187. [DOI: 10.1016/j.ijcard.2016.08.305] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 08/19/2016] [Indexed: 11/27/2022]
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28
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Zhang YQ, Tian F, Chen JS, Chen YD, Zhou Y, Li B, Ma Q, Zhang Y. Delayed reendothelialization with rapamycin is rescued by the addition of nicorandil in balloon-injured rat carotid arteries. Oncotarget 2016; 7:75926-75939. [PMID: 27713157 PMCID: PMC5342788 DOI: 10.18632/oncotarget.12444] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 09/24/2016] [Indexed: 01/09/2023] Open
Abstract
Rapamycin is an immunosuppressive agent that is added to drug eluting stents. It prevents restenosis, but it also impairs reendothelialization. Nicorandil is a hybrid agent with adenosine triphosphated (ATP)-sensitive K+ (KATP) channel opener and nitrate properties. It prevents oxidative stress and cell apoptosis induced by rapamycin in endothelial cells in vitro. However, whether nicorandil promotes reendothelialization after angioplasty delayed by rapamycin remains to be determined. Balloon injury model was established in SD rats. Nicorandil increased reendothelialization impaired by rapamycin, and it decreased xanthine oxidase (XO)-generated reactive oxygen species (ROS) induced by rapamycin. In addition, eNOS expression inhibited by rapamycin was increased by nicorandil in vivo. In vitro, rapamycin-impeded cardiac microvascular endothelial cells (CMECs) migration, proliferation and rapamycin-induced ROS production were reversed by nicorandil. Knockdown of XO partially inhibited rapamycin-induced ROS production and cell apoptosis in CMECs, and it promoted CMECs migration and proliferation suppressed by rapamycin. Knockdown of Akt partially prevents eNOS upregulation promoted by nicorandil. The beneficial effect of nicorandil is exhibited by inhibiting XO and up-regulating Akt pathway. Nicorandil combined with rapamycin in effect rescue the deficiencies of rapamycin alone in arterial healing after angioplasty.
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Affiliation(s)
- Ying Qian Zhang
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Feng Tian
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Jin Song Chen
- Department of Cardiology, Chinese PLA 175th Hospital, Fujian, China.,Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Yun Dai Chen
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Ying Zhou
- VIP Medical Service Department, Beijing Shijitan Hospital, Beijing, China.,Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Bo Li
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Qiang Ma
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
| | - Ying Zhang
- Department of Cardiology, Chinese PLA General Hospital, Beijing, China
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29
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Fan Y, Fu X, Wang Y, Li W, Bi X, Wei L, Xiao Y, Bai S. Effect of Long-Term Administration of Nicorandil on Endothelial Function of the Radial Artery in Patients With Angina Undergoing Transradial Percutaneous Coronary Intervention. Angiology 2016; 68:633-639. [PMID: 27815334 DOI: 10.1177/0003319716675720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We evaluated the effect of long-term administration of nicorandil on endothelial function of the radial artery in patients with angina undergoing elective transradial coronary intervention (TRI). A total of 127 patients were randomly assigned to nicorandil (standard medication plus nicorandil 5 mg twice daily, n = 64) or control group (standard medication except nicorandil, n = 63) immediately after TRI procedure. Radial artery diameter (RAD), flow-mediated dilation (FMD), and nitroglycerin-mediated dilation (NMD) of radial artery were measured 1 day before TRI as well as 1 day and 3 months after TRI by Ultrasound-Doppler. No significant difference was observed in the baseline RAD, FMD, and NMD between the 2 groups (all P > .05). In cannulated arm, at 3-month follow-up, RAD in nicorandil group was much larger than that in the control group (2.78 ± 0.27 mm vs 2.61 ± 0.30 mm, P = .001). Besides, FMD and NMD were much higher in nicorandil group than those in the control group (10.38% ± 2.43% vs 6.81% ± 1.86%; 15.94% ± 6.28% vs 10.46% ± 5.37%, respectively, all Ps < .001). In conclusion, long-term administration of nicorandil after TRI could improve the endothelial function of the cannulated radial artery.
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Affiliation(s)
- Yanming Fan
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Xianghua Fu
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Yanbo Wang
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Wei Li
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Xile Bi
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Liye Wei
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Yuyang Xiao
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
| | - Shiru Bai
- 1 Department of Cardiology, Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China
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30
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Neuroprotective Effects of Nicorandil in Chronic Cerebral Hypoperfusion-Induced Vascular Dementia. J Stroke Cerebrovasc Dis 2016; 25:2717-2728. [PMID: 27622862 DOI: 10.1016/j.jstrokecerebrovasdis.2016.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 06/14/2016] [Accepted: 07/16/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Ischemia-induced chronic cerebral hypoperfusion (CCH) is associated with reduced cerebral blood flow and vascular dementia (VaD). Brain mitochondrial potassium (adenosine triphosphate-sensitive potassium [KATP]) channels have a beneficial role in various brain conditions. The utility of KATP channels in CCH-induced VaD is still unknown. The aim of this study is to investigate the role of nicorandil, a selective KATP channel opener, in CCH-induced VaD. METHODS The method of 2-vessel occlusion (2VO) was used to induce CCH in mice. Cognitive impairment was assessed using Morris water maze. Serum nitrosative stress (nitrite/nitrate), brain cholinergic dysfunction (acetylcholinesterase [AChE] activity), brain oxidative stress (thiobarbituric acid reactive substances, glutathione [GSH], catalase [CAT], and superoxide dismutase [SOD]), inflammation (myeloperoxidase [MPO]), and infarct size (2,3,5-triphenyltetrazolium chloride staining) were assessed. RESULTS 2-vessels-occluded animals have shown significant cognitive impairment, serum nitrosative stress (reduced nitrite/nitrate), cholinergic dysfunction (increased brain AChE activity), and increased brain oxidative stress (reduction in GSH content and SOD and CAT activities with a significant increase in lipid peroxidation), along with a significant increase in MPO activity and infarct size. However, nicorandil treatment has significantly attenuated various CCH-induced behavioral and biochemical impairments. CONCLUSIONS It may be said that 2VO provoked CCH leading to VaD, which was attenuated by the treatment of nicorandil. So, modulation of KATP channels may provide benefits in CCH-induced VaD.
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31
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Abstract
Nitrates have been used to treat symptoms of chronic stable angina for over 135 years. These drugs are known to activate nitric oxide (NO)-cyclic guanosine-3',-5'-monophasphate (cGMP) signaling pathways underlying vascular smooth muscle cell relaxation, albeit many questions relating to how nitrates work at the cellular level remain unanswered. Physiologically, the anti-angina effects of nitrates are mostly due to peripheral venous dilatation leading to reduction in preload and therefore left ventricular wall stress, and, to a lesser extent, epicardial coronary artery dilatation and lowering of systemic blood pressure. By counteracting ischemic mechanisms, short-acting nitrates offer rapid relief following an angina attack. Long-acting nitrates, used commonly for angina prophylaxis are recommended second-line, after beta-blockers and calcium channel antagonists. Nicorandil is a balanced vasodilator that acts as both NO donor and arterial K(+) ATP channel opener. Nicorandil might also exhibit cardioprotective properties via mitochondrial ischemic preconditioning. While nitrates and nicorandil are effective pharmacological agents for prevention of angina symptoms, when prescribing these drugs it is important to consider that unwanted and poorly tolerated hemodynamic side-effects such as headache and orthostatic hypotension can often occur owing to systemic vasodilatation. It is also necessary to ensure that a dosing regime is followed that avoids nitrate tolerance, which not only results in loss of drug efficacy, but might also cause endothelial dysfunction and increase long-term cardiovascular risk. Here we provide an update on the pharmacological management of chronic stable angina using nitrates and nicorandil.
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Affiliation(s)
- Jason M Tarkin
- Division of Cardiovascular Medicine, University of Cambridge, Box 110, ACCI, Addenbrooke's Hospital, Cambridge, CB2 QQ, UK
| | - Juan Carlos Kaski
- Cardiovascular and Cell Sciences Research Institute, St George's, University of London, Cranmer Terrace, Tooting, London, SW17 0RE, UK.
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32
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Afzal MZ, Reiter M, Gastonguay C, McGivern JV, Guan X, Ge ZD, Mack DL, Childers MK, Ebert AD, Strande JL. Nicorandil, a Nitric Oxide Donor and ATP-Sensitive Potassium Channel Opener, Protects Against Dystrophin-Deficient Cardiomyopathy. J Cardiovasc Pharmacol Ther 2016; 21:549-562. [PMID: 26940570 DOI: 10.1177/1074248416636477] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Accepted: 12/30/2015] [Indexed: 01/10/2023]
Abstract
BACKGROUND Dystrophin-deficient cardiomyopathy is a growing clinical problem without targeted treatments. We investigated whether nicorandil promotes cardioprotection in human dystrophin-deficient induced pluripotent stem cell (iPSC)-derived cardiomyocytes and the muscular dystrophy mdx mouse heart. METHODS AND RESULTS Dystrophin-deficient iPSC-derived cardiomyocytes had decreased levels of endothelial nitric oxide synthase and neuronal nitric oxide synthase. The dystrophin-deficient cardiomyocytes had increased cell injury and death after 2 hours of stress and recovery. This was associated with increased levels of reactive oxygen species and dissipation of the mitochondrial membrane potential. Nicorandil pretreatment was able to abolish these stress-induced changes through a mechanism that involved the nitric oxide-cyclic guanosine monophosphate pathway and mitochondrial adenosine triphosphate-sensitive potassium channels. The increased reactive oxygen species levels in the dystrophin-deficient cardiomyocytes were associated with diminished expression of select antioxidant genes and increased activity of xanthine oxidase. Furthermore, nicorandil was found to improve the restoration of cardiac function after ischemia and reperfusion in the isolated mdx mouse heart. CONCLUSION Nicorandil protects against stress-induced cell death in dystrophin-deficient cardiomyocytes and preserves cardiac function in the mdx mouse heart subjected to ischemia and reperfusion injury. This suggests a potential therapeutic role for nicorandil in dystrophin-deficient cardiomyopathy.
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Affiliation(s)
- Muhammad Z Afzal
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Melanie Reiter
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Courtney Gastonguay
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jered V McGivern
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Xuan Guan
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Zhi-Dong Ge
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - David L Mack
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Martin K Childers
- Department of Rehabilitation Medicine, University of Washington, Seattle, WA, USA Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA, USA
| | - Allison D Ebert
- Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Jennifer L Strande
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, USA Department of Cell Biology, Neurobiology and Anatomy, Medical College of Wisconsin, Milwaukee, WI, USA
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33
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Serizawa K, Yogo K, Tashiro Y, Takeda S, Kawasaki R, Aizawa K, Endo K. Eldecalcitol prevents endothelial dysfunction in postmenopausal osteoporosis model rats. J Endocrinol 2016; 228:75-84. [PMID: 26537128 DOI: 10.1530/joe-15-0332] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/03/2015] [Indexed: 01/07/2023]
Abstract
Postmenopausal women have high incidence of cardiovascular events as estrogen deficiency can cause endothelial dysfunction. Vitamin D is reported to be beneficial on endothelial function, but it remains controversial whether vitamin D is effective for endothelial dysfunction under the treatment for osteoporosis in postmenopausal women. The aim of this study was to evaluate the endothelial protective effect of eldecalcitol (ELD) in ovariectomized (OVX) rats. ELD (20 ng/kg) was orally administrated five times a week for 4 weeks from 1 day after surgery. After that, flow-mediated dilation (FMD) as an indicator of endothelial function was measured by high-resolution ultrasound in the femoral artery of living rats. ELD ameliorated the reduction of FMD in OVX rats. ELD inhibited the increase in NOX4, nitrotyrosine, and p65 and the decrease in dimer/monomer ratio of nitric oxide synthase in OVX rat femoral arteries. ELD also prevented the decrease in peroxisome proliferator-activated receptor gamma (PPARγ) in femoral arteries and cultured endothelial cells. Although PPARγ is known to inhibit osteoblastogenesis, ELD understandably increased bone mineral density of OVX rats without increase in PPARγ in bone marrow. These results suggest that ELD prevented the deterioration of endothelial function under condition of preventing bone loss in OVX rats. This endothelial protective effect of ELD might be exerted through improvement of endothelial nitric oxide synthase uncoupling, which is mediated by an antioxidative effect through normalization of vascular PPARγ/NF-κB signaling.
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Affiliation(s)
- Kenichi Serizawa
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Kenji Yogo
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Yoshihito Tashiro
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Satoshi Takeda
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Ryohei Kawasaki
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Ken Aizawa
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
| | - Koichi Endo
- Product Research DepartmentChugai Pharmaceutical Co., Ltd, 1-135 Komakado, Gotemba, Shizuoka 412-8513, JapanProduct Research DepartmentChugai Pharmaceutical Co., Ltd, 200 Kajiwara, Kamakura, Kanagawa 247-8530, JapanMedical Science DepartmentChugai Pharmaceutical Co., Ltd, 2-1-1 Nihonbashi-Muromachi, Chuo-ku, Tokyo 103-8324, Japan
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Chen Z, Chen X, Li S, Huo X, Fu X, Dong X. Nicorandil improves myocardial function by regulating plasma nitric oxide and endothelin-1 in coronary slow flow. Coron Artery Dis 2015; 26:114-20. [PMID: 25325437 PMCID: PMC4323571 DOI: 10.1097/mca.0000000000000179] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Coronary slow flow (CSF) is a special coronary microvascular disorder. The pathogenesis and effective therapeutics of CSF remain unclear. This study aimed to evaluate the global and regional functions of the left ventricle (LV) and investigate the efficacy of nicorandil in patients with CSF. PATIENTS AND METHODS Thirty-six patients with CSF in the left anterior descending (LAD) branch and 20 patients with normal coronary arteries were included. Global and regional functions of the LV supplied by LAD were measured using conventional Doppler echocardiography and two-dimensional speckle tracking echocardiography, respectively, within 24 h after coronary angiography. Concentrations of plasma nitric oxide (NO) and endothelin-1 (ET-1) were detected using colorimetry and radioimmunoassay, respectively. The function of the LV and the levels of NO and ET-1 were also investigated before and 90 days after treatment with 15 mg/day of nicorandil. RESULTS Compared with the control group, the early diastolic peak velocity (E), E/A ratio, and plasma NO levels were lower, whereas the late diastolic peak flow velocity (A) and plasma ET-1 levels were significantly higher in the CSF group (P<0.05). The longitudinal strain rate peak of the LV was reduced significantly in CSF patients (P<0.001). After treatment, 75% (27/36) of CSF patients were free of chest pain. The values of E peak, E/A ratio, longitudinal strain rate peak, and plasma NO level were increased (P<0.001), whereas the ET-1 level was decreased in CSF patients (P<0.001). CONCLUSION Nicorandil may improve chest pain symptoms and the impaired function of the LV, possibly by increasing plasma NO and reducing ET-1 in CSF.
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Affiliation(s)
- Zuoyuan Chen
- Departments of aCardiology bCardiac Ultrasound, The Affiliated Hospital of Qingdao University cDepartment of Internal Medicine, Qingdao Commercial Hospital dDepartment of Cardiology, Qingdao Fifth People's Hospital, Qingdao eDepartment of Cardiology, Dezhou People's Hospital, Dezhou, Shandong, China
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Serizawa K, Yogo K, Tashiro Y, Aizawa K, Kawasaki R, Hirata M, Endo K. Epoetin beta pegol prevents endothelial dysfunction as evaluated by flow-mediated dilation in chronic kidney disease rats. Eur J Pharmacol 2015; 767:10-6. [PMID: 26432688 DOI: 10.1016/j.ejphar.2015.09.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2015] [Revised: 09/18/2015] [Accepted: 09/21/2015] [Indexed: 12/17/2022]
Abstract
Chronic kidney disease (CKD) patients have a poor prognosis due to cardiovascular disease. Anemia and endothelial dysfunction are important risk factors for cardiovascular events in CKD patients, and treatment with erythropoiesis-stimulating agent (ESA) has been reported to improve the quality of life in CKD patients. In this study, we evaluated the effect of anemia correcting dose of epoetin beta pegol (continuous erythropoietin receptor activator; C.E.R.A.) on endothelial function in 5/6 nephrectomized rats (Nx rats). C.E.R.A. was subcutaneously administered once a fortnight, 5 times in total, from 1 week after nephrectomy. Twenty-four hours after last administration, endothelial function was evaluated by measuring flow-mediated dilation (FMD) in the femoral arteries of anesthetized Nx rats by ultrasound system. Femoral arteries were harvested for western blot analysis. C.E.R.A. significantly increased FMD of Nx rats. Endothelium-independent vasodilation induced by nitroglycerin injection was not influenced by C.E.R.A treatment. Nox4 expression and nitrotyrosine accumulation were significantly decreased, and phosphorylation of eNOS was significantly enhanced in the femoral arteries of C.E.R.A.-treated rats. C.E.R.A. normalized hemoglobin levels but did not affect body weight, systolic blood pressure, heart rate, urinary protein excretion and plasma creatinine. These results indicate that C.E.R.A. prevented endothelial dysfunction in Nx rats, possibly through reduction of local oxidative stress and enhancement of eNOS phosphorylation in the arteries. This study provides the first evidence that C.E.R.A. prevented endothelial dysfunction in CKD model rats under conditions of amelioration of anemia.
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Affiliation(s)
- Kenichi Serizawa
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Kenji Yogo
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Yoshihito Tashiro
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Ken Aizawa
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Ryohei Kawasaki
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Michinori Hirata
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan
| | - Koichi Endo
- Product Research Department, Chugai Pharmaceutical Co., Ltd., 1-135 Komakado, Gotemba, Shizuoka 412-8513, Japan.
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Wang GG, Chen QY, Li W, Lu XH, Zhao X. Ginkgolide B increases hydrogen sulfide and protects against endothelial dysfunction in diabetic rats. Croat Med J 2015; 56:4-13. [PMID: 25727037 PMCID: PMC4364347 DOI: 10.3325/cmj.2015.56.4] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Aim To evaluate the effect of ginkgolide B treatment on vascular endothelial function in diabetic rats. Methods The study included four groups with 15 male Sprague-Dawley rats: control group; control group treated with ginkgolide B; diabetic group; and diabetic treated with ginkgolide B. The activity of superoxide dismutase (SOD), malondialdehyde content, and nicotinamide adenine dinucleotide phosphate (NADPH) oxidase subunits, and glutathione peroxidase 1 (GPX1) protein expression were determined in aortic tissues. Vasoconstriction to phenylephrine (PHE) and vasorelaxation to acetylcholine (Ach) and sodium nitroprusside (SNP) were assessed in aortic rings. Nitric oxide (NO) and hydrogen sulfide (H2S) were measured, as well as cystathionine γ lyase (CSE) and cystathionine β synthetase (CBS) protein expression, and endothelial nitric oxide synthase (eNOS) activity. Results Diabetes significantly impaired PHE-induced vasoconstriction and Ach-induced vasorelaxation (P < 0.001), reduced NO bioavailability and H2S production (P < 0.001), SOD activity, and GPX1 protein expression (P < 0.001), and increased malondialdehyde content and NADPH oxidase subunits, and CSE and CBS protein expression (P < 0.001). Ginkgolide B treatment improved PHE vasoconstriction and Ach vasorelaxation (P < 0.001), restored SOD (P = 0.005) and eNOS (P < 0.001) activities, H2S production (P = 0.044) and decreased malondialdehyde content (P = 0.014). Vasorelaxation to SNP was not significantly different in control and diabetic rats with or without ginkgolide B treatment. Besides, ginkgolide B increased GPX1 protein expression and reduced NADPH oxidase subunits, CBS and CSE protein expression. Conclusion Ginkgolide B alleviates endothelial dysfunction by reducing oxidative stress and elevating NO bioavailability and H2S production in diabetic rats.
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Affiliation(s)
- Guo-Guang Wang
- Guo-guang Wang, Department of Pathophysiology, School of Basic Medicine, Wannan Medical College, 22 # West of Wenchang Road, Wuhu, China,
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Lau YS, Ling WC, Murugan D, Mustafa MR. Boldine Ameliorates Vascular Oxidative Stress and Endothelial Dysfunction: Therapeutic Implication for Hypertension and Diabetes. J Cardiovasc Pharmacol 2015; 65:522-31. [PMID: 25469805 PMCID: PMC4461386 DOI: 10.1097/fjc.0000000000000185] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2014] [Accepted: 10/27/2014] [Indexed: 02/07/2023]
Abstract
Epidemiological and clinical studies have demonstrated that a growing list of natural products, as components of the daily diet or phytomedical preparations, are a rich source of antioxidants. Boldine [(S)-2,9-dihydroxy-1,10-dimethoxy-aporphine], an aporphine alkaloid, is a potent antioxidant found in the leaves and bark of the Chilean boldo tree. Boldine has been extensively reported as a potent "natural" antioxidant and possesses several health-promoting properties like anti-inflammatory, antitumor promoting, antidiabetic, and cytoprotective. Boldine exhibited significant endothelial protective effect in animal models of hypertension and diabetes mellitus. In isolated thoracic aorta of spontaneously hypertensive rats, streptozotocin-induced diabetic rats, and db/db mice, repeated treatment of boldine significantly improved the attenuated acetylcholine-induced endothelium-dependent relaxations. The endothelial protective role of boldine correlated with increased nitric oxide levels and reduction of vascular reactive oxygen species via inhibition of the nicotinamide adenine dinucleotide phosphate oxidase subunits, p47 and nicotinamide adenine dinucleotide phosphate oxidase 2, and angiotensin II-induced bone morphogenetic protein-4 oxidative stress cascade with downregulation of angiotensin II type 1 receptor and bone morphogenetic protein-4 expression. Taken together, it seems that boldine may exert protective effects on the endothelium via several mechanisms, including protecting nitric oxide from degradation by reactive oxygen species as in oxidative stress-related diseases. The present review supports a complimentary therapeutic role of the phytochemical, boldine, against endothelial dysfunctions associated with hypertension and diabetes mellitus by interfering with the oxidative stress-mediated signaling pathway.
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Affiliation(s)
- Yeh Siiang Lau
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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Singh P, Gupta S, Sharma B. Melatonin receptor and KATP channel modulation in experimental vascular dementia. Physiol Behav 2015; 142:66-78. [PMID: 25659733 DOI: 10.1016/j.physbeh.2015.02.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2014] [Revised: 02/03/2015] [Accepted: 02/04/2015] [Indexed: 01/08/2023]
Abstract
Cerebrovascular and cardiovascular diseases are stated as important risk factors of vascular dementia (VaD) and other cognitive disorders. In the central nervous system, melatonin (MT1/MT2) as well as serotonin subtype 2C (5-HT2C) receptors is pharmacologically associated with various neurological disorders. Brain mitochondrial potassium channels have been reported for their role in neuroprotection. This study has been structured to investigate the role of agomelatine, a melatonergic MT1/MT2 agonist and nicorandil, a selective ATP sensitive potassium (KATP) channel opener in renal artery ligation (two-kidney-one-clip: 2K1C) hypertension induced endothelial dysfunction, brain damage and VaD. 2K1C-renovascular hypertension has increased mean arterial blood pressure (MABP), impaired memory (elevated plus maze and Morris water maze), endothelial function, reduced serum nitrite/nitrate and increased brain damage (TTC staining of brain sections). Furthermore, 2K1C animals have shown high levels of oxidative stress in serum (increased thiobarbituric acid reactive species-TBARS with decreased levels of glutathione-GSH, superoxide dismutase-SOD and catalase-CAT), in the aorta (increased aortic superoxide anion) and in the brain (increased TBARS with decreased GSH, SOD and CAT). 2K1C has also induced a significant increase in brain inflammation (myeloperoxidase-MPO levels), acetylcholinesterase activity (AChE) and calcium levels. Impairment in mitochondrial complexes like NADH dehydrogenase (complex-I), succinate dehydrogenase (complex-II) and cytochrome oxidase (complex-IV) was also noted in 2K1C animals. Administration of agomelatine, nicorandil and donepezil significantly attenuated 2K1C-hypertension induced impairments in memory, endothelial function, nitrosative stress, mitochondrial dysfunction, inflammation and brain damage. Therefore, modulators of MT1/MT2 receptors and KATP channels may be considered as potential agents for the management of renovascular hypertension induced VaD.
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Affiliation(s)
- Prabhat Singh
- CNS and CVS Pharmacology Lab., Department of Pharmacology, School of Pharmacy, Bharat Institute of Technology, Partapur Bypass, Meerut, 250103 Uttar Pradesh, India.
| | - Surbhi Gupta
- CNS and CVS Pharmacology Lab., Department of Pharmacology, School of Pharmacy, Bharat Institute of Technology, Partapur Bypass, Meerut, 250103 Uttar Pradesh, India.
| | - Bhupesh Sharma
- School of Pharmacy, Bharat Institute of Technology, Partapur Bypass, Meerut, 250103 Uttar Pradesh, India; CNS Pharmacology, Conscience Research, Pocket F-233, B, Dilshad Garden, Delhi 110095, India.
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Elshazly SM. Ameliorative effect of nicorandil on high fat diet induced non-alcoholic fatty liver disease in rats. Eur J Pharmacol 2015; 748:123-32. [DOI: 10.1016/j.ejphar.2014.12.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2014] [Revised: 12/12/2014] [Accepted: 12/15/2014] [Indexed: 02/07/2023]
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Luo B, Wu P, Bu T, Zeng Z, Lu D. All-cause mortality and cardiovascular events with nicorandil in patients with IHD: systematic review and meta-analysis of the literature. Int J Cardiol 2014; 176:661-9. [PMID: 25217220 DOI: 10.1016/j.ijcard.2014.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2013] [Revised: 05/12/2014] [Accepted: 07/05/2014] [Indexed: 11/17/2022]
Abstract
BACKGROUND Nicorandil is able to protect the cardiomyocytes from ischemic damage, but clear benefits of nicorandil in all-cause mortality and cardiovascular events were not consistently reported in patients with ischemic heart disease (IHD). MATERIALS AND RESULTS Cochrane, PubMed, EMBASE, CBM, CNKI and Wangfang databases were searched for randomized controlled trials. Data on all-cause mortality and cardiovascular events were collected. Nicorandil groups were pooled to perform a comparison with control groups and to get the pooled odds ratios (ORs) and associated 95% confidence intervals (CIs) for all-cause mortality, relative risks (RRs), and associated 95% CIs for cardiovascular events. STATA 11.0 software was used for all-cause mortality and cardiovascular events statistics. We retrieved 17 randomized controlled studies enrolling a total of 7305 patients. The addition of nicorandil treatment significantly reduced cardiovascular events (13.83% versus 18.01%; RR, 0.77; 95% CI, 0.69 to 0.86). No differences in all-cause mortality (3.83% versus 4.70%; OR, 0.81; 95% CI, 0.64 to 1.02), and repeat revascularization rate (13.06% versus 13.54%; RR, 0.95; 95% CI, 0.70 to 1.29) were observed. There was a weak linear association between cardiovascular events and nicorandil in IHD with diabetes (P=0.099). CONCLUSIONS The results suggest that nicorandil as an adjunct therapy to IHD is associated with reduced cardiovascular events in patients with IHD.
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Affiliation(s)
- Bihui Luo
- Department of Cardiology, Cardiovascular Research Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China
| | - Pingsheng Wu
- Department of Cardiovascular Medicine, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China.
| | - Tong Bu
- Department of Cardiology, Cardiovascular Research Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China
| | - Zhaohua Zeng
- Department of Cardiology, Cardiovascular Research Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China
| | - Dongfeng Lu
- Department of Cardiology, Cardiovascular Research Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong 510120, China.
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Storniolo CE, Roselló-Catafau J, Pintó X, Mitjavila MT, Moreno JJ. Polyphenol fraction of extra virgin olive oil protects against endothelial dysfunction induced by high glucose and free fatty acids through modulation of nitric oxide and endothelin-1. Redox Biol 2014; 2:971-7. [PMID: 25460732 PMCID: PMC4215463 DOI: 10.1016/j.redox.2014.07.001] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/09/2014] [Accepted: 07/14/2014] [Indexed: 01/11/2023] Open
Abstract
Epidemiological and clinical studies have reported that olive oil reduces the incidence of cardiovascular disease. However, the mechanisms involved in this beneficial effect have not been delineated. The endothelium plays an important role in blood pressure regulation through the release of potent vasodilator and vasoconstrictor agents such as nitric oxide (NO) and endothelin-1 (ET-1), respectively, events that are disrupted in type 2 diabetes. Extra virgin olive oil contains polyphenols, compounds that exert a biological action on endothelial function. This study analyzes the effects of olive oil polyphenols on endothelial dysfunction using an in vitro model that simulates the conditions of type 2 diabetes. Our findings show that high glucose and linoleic and oleic acids decrease endothelial NO synthase phosphorylation, and consequently intracellular NO levels, and increase ET-1 synthesis by ECV304 cells. These effects may be related to the stimulation of reactive oxygen species production in these experimental conditions. Hydroxytyrosol and the polyphenol extract from extra virgin olive oil partially reversed the above events. Moreover, we observed that high glucose and free fatty acids reduced NO and increased ET-1 levels induced by acetylcholine through the modulation of intracellular calcium concentrations and endothelial NO synthase phosphorylation, events also reverted by hydroxytyrosol and polyphenol extract. Thus, our results suggest a protective effect of olive oil polyphenols on endothelial dysfunction induced by hyperglycemia and free fatty acids.
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Affiliation(s)
- Carolina Emilia Storniolo
- Department of Physiology, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII s/n, Barcelona E-08028, Spain
| | - Joan Roselló-Catafau
- Department of Experimental Pathology, IIBB-CSIC, IDIBAPS, Barcelona E-08036, Spain
| | - Xavier Pintó
- Lipids and Vascular Risk Unit, Internal Medicine, University Hospital of Bellvitge, Hospitalet de Llobregat, Barcelona E-08907, Spain
| | - María Teresa Mitjavila
- Department of Physiology and Immunology, Faculty of Biology, University of Barcelona, Avda. Diagonal 485, Barcelona E-08028, Spain
| | - Juan José Moreno
- Department of Physiology, Faculty of Pharmacy, University of Barcelona, Avda. Joan XXIII s/n, Barcelona E-08028, Spain.
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Tashiro Y, Yogo K, Serizawa K, Endo K. Nicorandil suppresses urinary protein excretion and activates eNOS in Dahl salt-sensitive hypertensive rats. Clin Exp Nephrol 2014; 19:343-9. [DOI: 10.1007/s10157-014-0998-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2013] [Accepted: 06/06/2014] [Indexed: 10/25/2022]
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Gupta S, Sharma B. Protective effects of phosphodiesterase-1 (PDE1) and ATP sensitive potassium (KATP) channel modulators against 3-nitropropionic acid induced behavioral and biochemical toxicities in experimental Huntington׳s disease. Eur J Pharmacol 2014; 732:111-22. [DOI: 10.1016/j.ejphar.2014.03.032] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 03/15/2014] [Accepted: 03/24/2014] [Indexed: 12/16/2022]
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Liu L, Liu Y, Qi B, Wu Q, Li Y, Wang Z. Nicorandil attenuates endothelial VCAM-1 expression via thioredoxin production in diabetic rats induced by streptozotocin. Mol Med Rep 2014; 9:2227-32. [PMID: 24676284 DOI: 10.3892/mmr.2014.2066] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 02/27/2014] [Indexed: 11/06/2022] Open
Abstract
The anti-angina agent nicorandil has been reported to be beneficial even in patients who have angina with diabetes. However, the mechanism underlying the effect of nicorandil in patients with diabetes remains to be elucidated. In this study, the protective effect of nicorandil on thioredoxin (TRX) protein was investigated, as TRX is a multifunctional endogenous redox regulator that protects cells against various types of cellular and tissue stress. This study was conducted to examine whether nicorandil induces the expression of TRX for the protection against diabetic damage in the vascular tissue of rats. Diabetes was induced in rats by intraperitoneal injection of streptozotocin (STZ) (fasting glucose levels in STZ-induced rats were >14 mmol/l). Diabetic rats were divided into a diabetic control and a nicorandil-treated group. Nicorandil was administered at a dosage of 15 mg/kg/day by gavage feeding. After five weeks of nicorandil administration, blood samples were obtained from the angular vein to measure levels of stress markers, serum superoxide dismutase and malondialdehyde, using the ELISA. The expression of TRX in STZ-induced rat vascular tissue was analyzed by immunohistochemistry, quantitative polymerase chain reaction (qPCR) and western blot analysis. The oral administration of nicorandil induced TRX protein and mRNA expression in the vascular tissue of STZ-induced diabetic rats. In the diabetic control group, the levels of stress were markedly higher than those in the nicorandil-treated group, indicating that nicorandil reduces oxidative stress in serum. In addition to inducing TRX expression, nicorandil attenuated the expression of the vascular cell adhesion molecule-1 (VCAM-1) in diabetic rat vascular endothelial cells. In conclusion, nicorandil attenuates the formation of reactive oxygen species and induces TRX protein expression, consequently resulting in the suppression of VCAM-1 secretion in the vascular endothelial cells of STZ-induced diabetic rats.
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Affiliation(s)
- Lihua Liu
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P.R. China
| | - Yun Liu
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P.R. China
| | - Benling Qi
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P.R. China
| | - Qinqin Wu
- Department of Geriatrics, The Central Hospital of Wuhan, Wuhan 430014, P.R. China
| | - Yuanyuan Li
- Department of Geriatrics, Wuhan General Hospital of Guangzhou Military, Wuhan 430070, P.R. China
| | - Zhaohui Wang
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P.R. China
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Serizawa K, Yogo K, Tashiro Y, Aizawa K, Ishizuka N. GATA-4 transcription factor regulates cardiac COX-2 expression induced by nicorandil in left ventricle of rats. Pharmacology 2014; 93:129-36. [PMID: 24642889 DOI: 10.1159/000360008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 01/27/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND AIMS Cardioprotective effects induced by delayed ischemic preconditioning and by nicorandil are mediated via expression of cardioprotective factors such as COX-2. The present study was undertaken to evaluate whether nicorandil could induce COX-2 in rats and to elucidate its mode of induction pharmacologically. METHODS AND RESULTS Three hours after administration of nicorandil (10 mg/kg, p.o.), COX-2 mRNA and protein were significantly increased in the left ventricle, although other cardioprotective factors (Bcl-2, eNOS, hexokinase, HSP, and iNOS) were not increased. This COX-2 induction in the left ventricle was preceded by induction of GATA-4, which was significant from 1 h after administration. Ventricular levels of 6-keto-prostaglandin F1α were increased 6 h after administration. Although pinacidil or isosorbide dinitrate alone did not increase COX-2 mRNA, their combined application significantly increased COX-2 mRNA. Moreover, although glibenclamide or ODQ each partly inhibited the induction of COX-2 mRNA by nicorandil, their combined application significantly inhibited it. These results suggest that nicorandil induces COX-2 protein through both the activation of KATP channels and guanylate cyclase. CONCLUSION The present study demonstrated that nicorandil induces COX-2 via GATA-4 induction in the heart through both KATP channel activation and its nitrate-like properties.
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Affiliation(s)
- Kenichi Serizawa
- Product Research Department, Chugai Pharmaceutical Co., Ltd., Gotemba, Japan
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Su Y, Qadri SM, Wu L, Liu L. Methylglyoxal modulates endothelial nitric oxide synthase-associated functions in EA.hy926 endothelial cells. Cardiovasc Diabetol 2013; 12:134. [PMID: 24050620 PMCID: PMC4015749 DOI: 10.1186/1475-2840-12-134] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 09/02/2013] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Increased levels of the sugar metabolite methylglyoxal (MG) in vivo were shown to participate in the pathophysiology of vascular complications in diabetes. Alterations of endothelial nitric oxide synthase (eNOS) activity by hypophosphorylation of the enzyme and enhanced monomerization are found in the diabetic milieu, and the regulation of this still remains undefined. Using various pharmacological approaches, we elucidate putative mechanisms by which MG modulates eNOS-associated functions of MG-stimulated superoxide O₂•⁻ production, phosphorylation status and eNOS uncoupling in EA.hy926 human endothelial cells. METHODS In cultured EA.hy926 endothelial cells, the effects of MG treatment, tetrahydrobiopterin (BH4; 100 μM) and sepiapterin (20 μM) supplementation, NOS inhibition by N(G)-nitro-L-arginine methyl ester (L-NAME; 50 μM), and inhibition of peroxynitrite (ONOO⁻) formation (300 μM Tempol plus 50 μM L-NAME) on eNOS dimer/monomer ratios, Ser-1177 eNOS phosphorylation and 3-nitrotyrosine (3NT) abundance were quantified using immunoblotting. O₂•⁻-dependent fluorescence was determined using a commercially available kit and tissue biopterin levels were measured by fluorometric HPLC analysis. RESULTS In EA.hy926 cells, MG treatment significantly enhanced O₂•⁻ generation and 3NT expression and reduced Ser-1177 eNOS phosphorylation, eNOS dimer/monomer ratio and cellular biopterin levels indicative of eNOS uncoupling. These effects were significantly mitigated by administration of BH4, sepiapterin and suppression of ONOO⁻ formation. L-NAME treatment significantly blunted eNOS-derived O₂•⁻ generation but did not modify eNOS phosphorylation or monomerization. CONCLUSION MG triggers eNOS uncoupling and hypophosphorylation in EA.hy926 endothelial cells associated with O₂•⁻ generation and biopterin depletion. The observed effects of the glycolysis metabolite MG presumably account, at least in part, for endothelial dysfunction in diabetes.
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Affiliation(s)
- Yang Su
- Department of Pharmacology, College of Medicine, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK, Canada
| | - Syed M Qadri
- Department of Pharmacology, College of Medicine, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK, Canada
| | - Lingyun Wu
- Department of Health Sciences, Lakehead University and Thunder Bay Regional Research Institute, Thunder Bay, ON, Canada
| | - Lixin Liu
- Department of Pharmacology, College of Medicine, University of Saskatchewan, 107 Wiggins Road, Saskatoon, SK, Canada
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Ho YJ, Chen WP, Chi TC, Chang Chien CC, Lee AS, Chiu HL, Kuo YH, Su MJ. Caffeic acid phenethyl amide improves glucose homeostasis and attenuates the progression of vascular dysfunction in Streptozotocin-induced diabetic rats. Cardiovasc Diabetol 2013; 12:99. [PMID: 23829275 PMCID: PMC3706244 DOI: 10.1186/1475-2840-12-99] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Accepted: 06/30/2013] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Glucose intolerance and cardiovascular complications are major symptoms in patients with diabetes. Many therapies have proven beneficial in treating diabetes in animals by protecting the cardiovascular system and increasing glucose utilization. In this study, we evaluated the effects of caffeic acid phenethyl amide (CAPA) on glucose homeostasis and vascular function in streptozotocin (STZ)-induced type 1 diabetic rats. METHODS Diabetes (blood glucose levels > 350 mg/dL), was induced in Wistar rats by a single intravenous injection of 60 mg/kg STZ. Hypoglycemic effects were then assessed in normal and type 1 diabetic rats. In addition, coronary blood flow in Langendorff-perfused hearts was evaluated in the presence or absence of nitric oxide synthase (NOS) inhibitor. The thoracic aorta was used to measure vascular response to phenylephrine. Finally, the effect of chronic treatment of CAPA and insulin on coronary artery flow and vascular response to phenylephrine were analyzed in diabetic rats. RESULTS Oral administration of 0.1 mg/kg CAPA decreased plasma glucose in normal (32.9 ± 2.3% decrease, P < 0.05) and diabetic rats (11.8 ± 5.5% decrease, P < 0.05). In normal and diabetic rat hearts, 1-10 μM CAPA increased coronary flow rate, and this increase was abolished by 10 μM NOS inhibitor. In the thoracic aorta, the concentration/response curve of phenylephrine was right-shifted by administration of 100 μM CAPA. Coronary flow rate was reduced to 7.2 ± 0.2 mL/min at 8 weeks after STZ-induction. However, 4 weeks of treatment with CAPA (3 mg/kg, intraperitoneal, twice daily) started at 4 weeks after STZ induction increased flow rate to 11.2 ± 0.5 mL/min (P < 0.05). In addition, the contractile response induced by 1 μM phenylephrine increased from 6.8 ± 0.6 mN to 11.4 ± 0.4 mN (P < 0.05) and 14.9 ± 1.4 mN (P < 0.05) by insulin (1 IU/kg, intraperitoneal) or CAPA treatment, respectively. CONCLUSIONS CAPA induced hypoglycemic activity, increased coronary blood flow and vascular response to phenylephrine in type 1 diabetic rats. The increase in coronary blood flow may result from endothelial NOS activation. However, the detailed cellular mechanisms need to be further evaluated.
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Affiliation(s)
- Yi-Jin Ho
- Institute of Pharmacology, College of Medicine, National Taiwan University, Taipei, Taiwan
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Abdel-Raheem IT, Taye A, Abouzied MM. Cardioprotective Effects of Nicorandil, a Mitochondrial Potassium Channel Opener against Doxorubicin-Induced Cardiotoxicity in Rats. Basic Clin Pharmacol Toxicol 2013; 113:158-66. [DOI: 10.1111/bcpt.12078] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2012] [Accepted: 04/02/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Ihab T. Abdel-Raheem
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Damanhour University; Damanhour; Egypt
| | - Ashraf Taye
- Department of Pharmacology and Toxicology; Faculty of Pharmacy; Minia University; Minia; Egypt
| | - Mekky M. Abouzied
- Department of Biochemistry; Faculty of Pharmacy; Minia University; Minia; Egypt
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Abstract
Gender-specific data focused on cardiovascular disease (CVD) are becoming increasingly available. This is of great importance, given that CVD has become the number 1 killer of women, and unlike for men, mortality rates do not seem to be declining. Many factors are cited as the causes of sex-based differences, including delays in recognizing symptoms, underutilization of diagnostic tests and treatments, as well as anatomic, physiological, and genetic factors. Evidence of fundamental biological differences in vascular function and the underlying pathologic processes is only beginning to elucidated, motivated by growing evidence of differences in clinical presentations and outcomes between men and women. The good news is that we are starting to see improvements in outcomes for women, such as after coronary revascularization; decrease in complication rates with the advent of new techniques, such as radial access for cardiac catheterizations; as well as increased participation of women in clinical trials. The underlying mechanisms of ischemic heart disease remain to be elucidated, and will help guide therapy and ultimately may explain the higher prevalence of : subendocardial myocardial infarctions, spontaneous arterial dissections, plaque erosion, increased vasospastic disorders, such as coronary microvascular disease, and pulmonary hypertension in women compared with men. We have made great progress in understanding gender-related differences in CVDs, but much remains to be done to optimize the prevention of CVD for both men and women.
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Boldine protects endothelial function in hyperglycemia-induced oxidative stress through an antioxidant mechanism. Biochem Pharmacol 2013. [DOI: 10.1016/j.bcp.2012.11.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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