1
|
Kryeziu I, Reçica S, Thaçi Q, Kurshumliu F, Hadzi-Petrushev N, Basholli-Salihu M, Mladenov M, Sopi RB. Quercetin supplementation attenuates airway hyperreactivity and restores airway relaxation in rat pups exposed to hyperoxia. Exp Biol Med (Maywood) 2023; 248:1492-1499. [PMID: 37837396 PMCID: PMC10666724 DOI: 10.1177/15353702231199468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 07/20/2023] [Indexed: 10/16/2023] Open
Abstract
Hyperoxia exposure of immature lungs contributes to lung injury and airway hyperreactivity. Up to now, treatments of airway hyperreactivity induced by hyperoxia exposure have been ineffective. The aim of this study was to investigate the effects of quercetin on hyperoxia-induced airway hyperreactivity, impaired relaxation, and lung inflammation. Newborn rats were exposed to hyperoxia (FiO2 > 95%) or ambient air (AA) for seven days. Subgroups were injected with quercetin (10 mg·kg-1·day-1). After exposures, tracheal cylinders were prepared for in vitro wire myography. Contraction to methacholine was measured in the presence or absence of organ bath quercetin and/or Nω-nitro-L-arginine methyl ester (L-NAME). Relaxation responses were evoked in preconstricted tissues using electrical field stimulation (EFS). Lung tumor necrosis factor-alpha (TNF-α) and interleukin-1β (IL-1β) levels were measured by enzyme-linked immunosorbent assay (ELISA). A P < 0.05 was considered statistically significant. Contractile responses of tracheal smooth muscle (TSM) of hyperoxic animals were significantly increased compared with AA animals (P < 0.001). Treatment with quercetin significantly reduced contraction in hyperoxic groups compared with hyperoxic control (P < 0.01), but did not have any effect in AA groups. In hyperoxic animals, relaxation of TSM was significantly reduced compared with AA animals (P < 0.001), while supplementation of quercetin restored the lost relaxation in hyperoxic groups. Incubation of preparations in L-NAME significantly reduced the quercetin effects on both contraction and relaxation (P < 0.01). Treatment of hyperoxic animals with quercetin significantly decreased the expression of TNF-α and IL-1β compared with hyperoxic controls (P < 0.001 and P < 0.01, respectively).The findings of this study demonstrate the protective effect of quercetin on airway hyperreactivity and suggest that quercetin might serve as a novel therapy to prevent and treat neonatal hyperoxia-induced airway hyperreactivity and inflammation.
Collapse
Affiliation(s)
- Islam Kryeziu
- Faculty of Medicine, University of Prishtina, 10 000 Prishtina, Kosovo
| | - Shkëlzen Reçica
- Faculty of Medicine, University of Prishtina, 10 000 Prishtina, Kosovo
| | - Qëndrim Thaçi
- Faculty of Medicine, University of Prishtina, 10 000 Prishtina, Kosovo
| | - Fisnik Kurshumliu
- Faculty of Medicine, University of Prishtina, 10 000 Prishtina, Kosovo
| | - Nikola Hadzi-Petrushev
- Faculty of Natural Sciences and Mathematics, Institute of Biology, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia
| | | | - Mitko Mladenov
- Faculty of Natural Sciences and Mathematics, Institute of Biology, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, North Macedonia
| | - Ramadan B Sopi
- Faculty of Medicine, University of Prishtina, 10 000 Prishtina, Kosovo
| |
Collapse
|
2
|
Malheiros J, Simões DM, Antunes PE, Figueirinha A, Cotrim MD, Fonseca DA. Vascular Effects of Polyphenols from Agrimonia eupatoria L. and Role of Isoquercitrin in Its Vasorelaxant Potential in Human Arteries. Pharmaceuticals (Basel) 2022; 15:ph15050638. [PMID: 35631463 PMCID: PMC9143967 DOI: 10.3390/ph15050638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 05/11/2022] [Accepted: 05/18/2022] [Indexed: 02/04/2023] Open
Abstract
Agrimonia eupatoria L. has been traditionally used for the treatment of inflammatory diseases but also as a hypotensive. To our knowledge, only one study has previously suggested an improvement in vascular endothelial function in diabetic conditions, as the underlying mechanisms and responsible compounds are unknown. In this study, we aimed to assess the direct vascular effects of Agrimonia eupatoria L. in human arteries. The infusion elicited a mild increase in basal vascular tone and a significant potentiation of the adrenergic contraction of 49.18% at 0.02 mg/mL, suggesting the presence of compounds with mild vasoconstrictor activity. In contrast, the ethyl acetate fraction inhibited adrenergic contraction by 80.65% at 2 mg/mL and elicited no effect on basal vascular tone. A potent concentration-dependent vasorelaxation was observed for both the infusion and the ethyl acetate fraction (maximal relaxation above 76% and 47%, respectively). Inhibition of nitric oxide synthase and cyclooxygenase elicited significant decreases in the vasorelaxation to the infusion, as, for the ethyl acetate fraction, only the cyclooxygenase pathway appeared to be involved. Isoquercitrin elicited a vasoactivity consistent with the ethyl acetate fraction, suggesting this is a major component responsible for the vasorelaxant properties of A. eupatoria. Further research is warranted to fully evaluate its vasoprotective properties with therapeutic potential in several conditions, e.g., atherosclerosis.
Collapse
Affiliation(s)
- Jéssica Malheiros
- Laboratory of Pharmacology and Pharmaceutical Care, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.); (D.M.S.); (M.D.C.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Daniela M. Simões
- Laboratory of Pharmacology and Pharmaceutical Care, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.); (D.M.S.); (M.D.C.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Pedro E. Antunes
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
- Centre of Cardiothoracic Surgery, University Hospital and Faculty of Medicine of Coimbra, 3000-075 Coimbra, Portugal
- Clinical Academic Centre of Coimbra, CACC, 3000-075 Coimbra, Portugal
| | - Artur Figueirinha
- Laboratory of Pharmacognosy, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- REQUIMTE/LAQV, R. D. Manuel II, Apartado 55142, 4051-401 Oporto, Portugal
- Correspondence: (A.F.); (D.A.F.); Tel.: +35-12-3948-8400 (D.A.F.)
| | - Maria Dulce Cotrim
- Laboratory of Pharmacology and Pharmaceutical Care, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.); (D.M.S.); (M.D.C.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Diogo A. Fonseca
- Laboratory of Pharmacology and Pharmaceutical Care, Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.); (D.M.S.); (M.D.C.)
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
- Correspondence: (A.F.); (D.A.F.); Tel.: +35-12-3948-8400 (D.A.F.)
| |
Collapse
|
3
|
White Wine—Induced Endothelium-Dependent Vasorelaxation in Sprague-Dawley Rats. Antioxidants (Basel) 2022; 11:antiox11050944. [PMID: 35624811 PMCID: PMC9137674 DOI: 10.3390/antiox11050944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/06/2022] [Accepted: 05/09/2022] [Indexed: 11/16/2022] Open
Abstract
The vasodilatory activity and polyphenolic content of commercially available white wine is low compared to red wines. This study assessed the vasodilator potential of white wines produced by four different fermentation processes: (1) white wine produced by the standard procedure; (2) grapes left to macerate completely for 30 days; (3) grapes left to macerate up to half of unfermented sugar; and (4) wine produced by cooling the must. All tested wine samples were analyzed for their phenolic content, antioxidant capacity, and ethanol content. Vasodilation was examined in the norepinephrine pre-contracted isolated rat aortas of male Sprague-Dawley rats randomly exposed to cumulative concentrations (0.1‰ to 8‰ final dilutions in organ baths) of each of the tested wine samples with or without quercetin and/or gallic acid supplementation, in the absence/presence of NOS inhibitor L-NAME. Standard procedure and the procedure involving must cooling gives wine with lower phenolic content, antioxidant capacity, and lower vasodilator potential, respectively. L-NAME inhibited vasodilation to all wine samples. Quercetin with or without gallic acid supplementation restored vasodilation. Results show that vasodilation to white wine is NO-dependent and suggest the possibility of increasing the antioxidant capacity and vasodilatory potential of white wine using different production procedures, depending on quercetin content.
Collapse
|
4
|
Wani SA, Khan LA, Basir SF. Quercetin and resveratrol ameliorate nickel-mediated hypercontraction in isolated Wistar rat aorta. J Smooth Muscle Res 2022; 58:89-105. [PMID: 36517014 PMCID: PMC9748311 DOI: 10.1540/jsmr.58.89] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
PURPOSE The ameliorative potential of quercetin and resveratrol on isolated endothelium-intact aortic rings incubated with nickel was examined. METHOD The effect of varying concentrations of quercetin and resveratrol was investigated on isolated Wistar rat aortic rings using an organ bath system over vasoconstrictor phenylephrine (PE) at 1 µM. To delineate the mechanism of action, isolated aortic rings were pre-incubated with pharmacological modulators, such as verapamil 1 µM, apocynin 100 µM, indomethacin 100 µM or N-G-nitro-L-arginine methyl ester (L-NAME) 100 µM, separately, before incubation with 100 µM quercetin and 30 µM resveratrol. To assess the ameliorative and prophylactic potentials of quercetin and resveratrol, aortic rings were also incubated with quercetin or resveratrol for 40 min, followed by incubation with nickel for 40 min. RESULTS At 100 µM, quercetin caused 29% inhibition of contraction, while resveratrol at 30 µM caused 55% inhibition of contraction in aortic rings compared with control. Aortic rings incubated with contractile modulators, such as verapamil, apocynin, indomethacin or N-G-nitro-L-arginine methyl ester (L-NAME), along with quercetin or resveratrol at their concentrations producing maximum relaxant effect, showed that both of these natural compounds exert their relaxant effect by inhibiting the generation of reactive oxygen species (ROS) from endothelial and smooth muscle cells, blocking voltage-gated calcium channels, and increasing the release of nitric oxide (NO). The mediation of hypercontraction by nickel is due to the increased ROS and the influx of calcium through voltage-dependent calcium channels. These natural compounds are shown to counter the nickel-induced effects, appearing as effective ameliorators. CONCLUSION In this study, we found that quercetin and resveratrol act as ameliorators of nickel-mediated hypercontraction by decreasing ROS and enhancing NO release from endothelial cells.
Collapse
Affiliation(s)
- Shahnawaz Ahmad Wani
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| | - Luqman Ahmad Khan
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| | - Seemi Farhat Basir
- Department of Biosciences, Faculty of Natural Science, Jamia Millia Islamia,
New Delhi 110025, India
| |
Collapse
|
5
|
Chen W, Zhong Y, Feng N, Guo Z, Wang S, Xing D. New horizons in the roles and associations of COX-2 and novel natural inhibitors in cardiovascular diseases. Mol Med 2021; 27:123. [PMID: 34592918 PMCID: PMC8482621 DOI: 10.1186/s10020-021-00358-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/18/2021] [Indexed: 01/03/2023] Open
Abstract
Age-related cardiovascular disease is the leading cause of death in elderly populations. Coxibs, including celecoxib, valdecoxib, etoricoxib, parecoxib, lumiracoxib, and rofecoxib, are selective cyclooxygenase-2 (COX-2) inhibitors used to treat osteoarthritis and rheumatoid arthritis. However, many coxibs have been discontinued due to adverse cardiovascular events. COX-2 contains cyclooxygenase (COX) and peroxidase (POX) sites. COX-2 inhibitors block COX activity without affecting POX activity. Recently, quercetin-like flavonoid compounds with OH groups in their B-rings have been found to serve as activators of COX-2 by binding the POX site. Galangin-like flavonol compounds serve as inhibitors of COX-2. Interestingly, nabumetone, flurbiprofen axetil, piketoprofen-amide, and nepafenac are ester prodrugs that inhibit COX-2. The combination of galangin-like flavonol compounds with these prodrug metabolites may lead to the development of novel COX-2 inhibitors. This review focuses on the most compelling evidence regarding the role and mechanism of COX-2 in cardiovascular diseases and demonstrates that quercetin-like compounds exert potential cardioprotective effects by serving as cofactors of COX-2.
Collapse
Affiliation(s)
- Wujun Chen
- Cancer Institute, Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao, 266071, Shandong, China
| | - Yingjie Zhong
- Cancer Institute, Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao, 266071, Shandong, China
| | - Nuan Feng
- Department of Nutrition, Qingdao Women and Children's Hospital of Qingdao University, Qingdao, 266000, Shandong, China
| | - Zhu Guo
- Cancer Institute, Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao, 266071, Shandong, China.
| | - Shuai Wang
- School of Medical Imaging, Radiotherapy Department of Affiliated Hospital, Weifang Medical University, Weifang, 261053, Shandong, China.
| | - Dongming Xing
- Cancer Institute, Department of Spine Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao Cancer Institute, Qingdao, 266071, Shandong, China. .,School of Life Sciences, Tsinghua University, Beijing, 100084, China.
| |
Collapse
|
6
|
Quercetin Exerts Age-Dependent Beneficial Effects on Blood Pressure and Vascular Function, But Is Inefficient in Preventing Myocardial Ischemia-Reperfusion Injury in Zucker Diabetic Fatty Rats. Molecules 2020; 25:molecules25010187. [PMID: 31906454 PMCID: PMC6983107 DOI: 10.3390/molecules25010187] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 12/20/2019] [Accepted: 12/24/2019] [Indexed: 12/28/2022] Open
Abstract
Background: Quercetin (QCT) was shown to exert beneficial cardiovascular effects in young healthy animals. The aim of the present study was to determine cardiovascular benefits of QCT in older, 6-month and 1-year-old Zucker diabetic fatty (ZDF) rats (model of type 2 diabetes). Methods: Lean (fa/+) and obese (fa/fa) ZDF rats of both ages were treated with QCT for 6 weeks (20 mg/kg/day). Isolated hearts were exposed to ischemia-reperfusion (I/R) injury (30 min/2 h). Endothelium-dependent vascular relaxation was measured in isolated aortas. Expression of selected proteins in heart tissue was detected by Western blotting. Results: QCT reduced systolic blood pressure in both lean and obese 6-month-old rats but had no effect in 1-year-old rats. Diabetes worsened vascular relaxation in both ages. QCT improved vascular relaxation in 6-month-old but worsened in 1-year-old obese rats and had no impact in lean controls of both ages. QCT did not exert cardioprotective effects against I/R injury and even worsened post-ischemic recovery in 1-year-old hearts. QCT up-regulated expression of eNOS in younger and PKCε expression in older rats but did not activate whole PI3K/Akt pathway. Conclusions: QCT might be beneficial for vascular function in diabetes type 2; however, increasing age and/or progression of diabetes may confound its vasculoprotective effects. QCT seems to be inefficient in preventing myocardial I/R injury in type 2 diabetes and/or higher age. Impaired activation of PI3K/Akt kinase pathway might be, at least in part, responsible for failing cardioprotection in these subjects.
Collapse
|
7
|
Rasouli Vani J, Taghi Mohammadi M, Sarami Foroshani M, Rezazade E. Evaluation of the neuroprotective and antioxidant effects of Dorema aucheri extract on cerebral ischaemia-reperfusion injury in rats. PHARMACEUTICAL BIOLOGY 2019; 57:255-262. [PMID: 30957616 PMCID: PMC6461074 DOI: 10.1080/13880209.2019.1597132] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
CONTEXT The hydroalcoholic extract of Dorema aucheri Bilhar (Umbelliferae) (DA) leaves, a medicinal plant, has powerful antioxidant properties. OBJECTIVE This study evaluates the neuroprotective effects of pre-treatment with DA leaves extract against cerebral ischaemia-induced brain injury through alteration of the antioxidant capacity. MATERIALS AND METHODS The study was conducted in three groups of Wistar rats (N = 47) as follows; sham, control ischaemic and pre-treated ischaemic groups. Rats were administered a fresh hydroalcoholic extract of DA leaves at a dosage of 200 mg/kg/day for 14 days. Then, the middle cerebral artery (MCA) of the right hemisphere was occluded for 90 min to achieve cerebral ischaemia. After 24 h reperfusion, cerebral infarction and superoxide dismutase (SOD) and catalase activities, as well as malondialdehyde (MDA), glutathione, and NOx contents were determined in the right hemispheres. RESULTS Occlusion of the right MCA caused noticeable cerebral infarction (298 ± 21 mm3) in control ischaemic group, but pre-treatment with DA extract considerably attenuated it (92 ± 14 mm3) in the pre-treated ischaemic group. DA extract significantly decreased the levels of MDA by 28% and NOx by 11% in pre-treated ischaemic group compared to the control ischaemic group. DA extract also enhanced glutathione content by 7%, SOD activity by 16% and catalase activity by 46% in pre-treated ischaemic rats compared to control ischaemic rats. DISCUSSION AND CONCLUSIONS DA is able to improve the antioxidant capacity and injuries of ischaemic brain. It is proposed as a neuroprotectant following cerebral ischaemia to decrease the injuries of ischaemic stroke.
Collapse
Affiliation(s)
- Javad Rasouli Vani
- Neuroscience Research Center Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mohammad Taghi Mohammadi
- Neuroscience Research Center Baqiyatallah University of Medical Sciences, Tehran, Iran
- Department of Physiology and Biophysics School of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
- CONTACT Mohammad Taghi Mohammadi ; Department of Physiology & Biophysics, School of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | | | - Elham Rezazade
- Department of Physiology and Biophysics School of Medicine, Baqiyatallah University of Medical Sciences, Tehran, Iran
| |
Collapse
|
8
|
Antiasthmatic activity of quercetin glycosides in neonatal asthmatic rats. 3 Biotech 2019; 9:189. [PMID: 31065489 DOI: 10.1007/s13205-019-1618-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Accepted: 02/07/2019] [Indexed: 12/11/2022] Open
Abstract
The present study investigated the anti-asthmatic activity of quercetin glycosides in neonatal asthmatic rats. Rats were divided into four groups: sham (non-asthmatic), asthmatic control, quercetin (25 mg/kg), and quercetin (50 mg/kg). Inflammatory cells in bronchoalveolar lavage fluid (BALF), inflammatory markers, apoptosis, fibrinogen level, prothrombin time, thrombin time, activated partial thromboplastin time, coagulation factor activity, and histopathology were monitored. Quercetin significantly reduced total leukocytes, eosinophils, tumor necrosis factor-α (TNF-α), interleukin (IL-6), nitric oxide (NO), and apoptosis. It also considerably reduced blood coagulation time and coagulation factor activity compared to the controls. The mRNA expression levels of TNF-α, IL-6, and inducible nitric oxide synthase (iNOS) were elevated in asthmatic rats by 1.3-, 1.04-, and 1.1-fold, respectively. However, treatment with 50 mg/kg quercetin glycosides significantly reduced the mRNA expression of TNF-α, IL-6, and iNOS by more than 40%. Quercetin considerably reduced the protein expression of iNOS. Airway and blood vessel narrowing, as well as the accumulation of eosinophils in the lungs were observed in neonatal asthmatic rats. However, treatment with quercetin glycosides significantly reduced inflammation and eosinophil infiltration. In summary, quercetin glycosides significantly attenuated levels of inflammatory markers, demonstrating its protective effects against neonatal asthma in rats.
Collapse
|
9
|
Ghareib SA, El-Bassossy HM, Elberry AA, Azhar A, Watson ML, Banjar ZM, Alahdal AM. Protective effect of zingerone on increased vascular contractility in diabetic rat aorta. Eur J Pharmacol 2016; 780:174-9. [PMID: 27020549 DOI: 10.1016/j.ejphar.2016.03.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Revised: 03/18/2016] [Accepted: 03/24/2016] [Indexed: 01/27/2023]
Abstract
The aim of the present study was to investigate the effect and possible mechanism of action of zingerone, the main constituent of ginger, on vascular reactivity in isolated aorta from diabetic rats. The results show that incubation of aortae with zingerone alleviates the exaggerated vasoconstriction of diabetic aortae to phenylephrine, as well as the impaired relaxatory response to acetylcholine in a concentration-dependent manner. Furthermore, Zingerone directly relax phenylephrine-precontracted aortae. The vasorelaxatory response is significantly attenuated by the nitric oxide synthase inhibitor Nω-nitro-l-arginine methyl ester hydrochloride and the guanylate cyclase inhibitor methylene blue but no effect of either the potassium channels blocker tetraethylammonium chloride, or the cyclooxygenase inhibitor indomethacin was observed. Zingerone had no effect on advanced glycation end product formation as well. In conclusion, zingerone ameliorates enhanced vascular contraction in diabetic aortae which may be mediated by its vasodilator effect through NO- and guanylate cyclase stimulation.
Collapse
Affiliation(s)
- Salah A Ghareib
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hany M El-Bassossy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Pharmacology, Faculty of Pharmacy, Zagazig University, Zagazig, Egypt
| | - Ahmed A Elberry
- Department of Clinical Pharmacy, Faculty of Pharmacy, King Abdulaziz University, Jeddah, Saudi Arabia; Department of Pharmacology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt.
| | - Ahmad Azhar
- Department of Pediatric Cardiology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Malcolm L Watson
- Department of Pharmacy and Pharmacology, University of Bath, Bath, UK
| | - Zainy M Banjar
- Department of Clinical Biochemistry, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Abdulrahman M Alahdal
- Department of Pharmacology, Faculty of Medicine, Beni-Suef University, Beni-Suef, Egypt
| |
Collapse
|
10
|
Idris B, Asmawi MZ, Nasiba US, Mahmud R, Abubakar K. Antihypertensive and Vasorelaxant Effect of Alstonia scholaris Stem Bark Extracts and Fractions. INT J PHARMACOL 2015. [DOI: 10.3923/ijp.2015.327.334] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
11
|
The relaxing effect of Poncirus fructus and its flavonoid content on porcine coronary artery. Lab Anim Res 2015; 31:33-9. [PMID: 25806081 PMCID: PMC4371475 DOI: 10.5625/lar.2015.31.1.33] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 03/12/2015] [Accepted: 03/13/2015] [Indexed: 11/24/2022] Open
Abstract
Coronary artery disease is a common occurrence in human, and causes enormous social cost. Poncirus fructus (PF), the dried immature fruits of Poncirus trifoliata Rafinesquem, is used in the treatment of womb contraction and dyspepsia, as a prokinetic, and in improving blood circulation. This study was performed to investigate the effects of PF and some of its flavonoids components on the coronary from the pig. The arterial ring was suspended by a pair of stainless steel stirrups in an organ bath. The end of the upper stirrup was connected to an isometric force transducer. A dose-dependent induction of relaxation was observed by both water and 70% ethanol extracts of PF in the porcine coronary artery precontracted with U46619 (100 nM), a stable analogue of the potent vasoconstrictor thromboxane A2. The 70% ethanol extract showed more efficacy than the water extract. Pretreatment of the artery with L-NAME (100 µM), a nitric oxide synthase inhibitor, resulted in a significant reduction in the relaxation induced by PF extract. In addition, ODQ (10 µM), a soluble guanylate cyclase inhibitor, also significantly reduced the effects of PF extracts. Hesperidin, a flavonoid present in PF, induced very weak relaxation of the porcine coronary artery at a high concentration (100 µM), while its aglycone, hesperetin, demonstrated a dose-dependent relaxation. In conclusion, PF extracts induced relaxation in the porcine coronary artery, partially through the nitric oxide-cGMP pathway, and the aglycones of flavonoids might be also involved in the relaxation of the same artery.
Collapse
|
12
|
Takır S, Altun IH, Sezgi B, Süzgeç-Selçuk S, Mat A, Uydeş-Doǧan BS. Vasorelaxant and blood pressure lowering effects of alchemilla vulgaris: A comparative study of methanol and aqueous extracts. Pharmacogn Mag 2015; 11:163-9. [PMID: 25709228 PMCID: PMC4329619 DOI: 10.4103/0973-1296.149733] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Revised: 05/14/2014] [Accepted: 01/21/2015] [Indexed: 11/20/2022] Open
Abstract
Background: In the last decade, a growing interest particularly in determining the cardiovascular effects of herbal extracts took place among researchers. Objective: Herein, we aimed to investigate the microvascular and blood pressure lowering effects of two differently processed extracts of the same herb, Alchemilla vulgaris (Rosaceaea), which was revealed to contain high levels of vasoactive compounds. Materials and Methods: For the purpose, endothelium intact rat mesenteric arteries were mounted in a myograph system and contracted with prostaglandin F2α (PGF2α: 3 × 10−5 M) or potassium chloride (K+: 40 mM). Then, aqueous and methanol extracts were added at 0.01–10 mg/ml concentrations in a cumulative manner. Results: Both extracts produced relaxations in PGF2α (3 × 10−5 M) precontracted arteries which were insensitive to the inhibitors of endothelium derived vasoactive substances namely, LG-nitro-L-arginine (10−4 M), ODQ (10−5 M) and indomethacin (10−5 M) or removal of endothelium. Opposite vascular effects were observed when extracts were applied in K+ precontracted arteries. In addition, oral administration of the methanol extract of Alchemilla vulgaris, but not the aqueous extract, reduced blood pressure significantly in L-NAME hypertensive rats. Conclusion: Our results demonstrated that the methanol extract of Alchemilla vulgaris has more prominent and favourable vascular effects in normal and experimental hypertensive conditions reinforcing its traditional use in cardiovascular disorders, in particular hypertension. These results most likely give rise to further studies to reveal its mechanism of action and clinical value of this herb.
Collapse
Affiliation(s)
- S Takır
- Department of Pharmacology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - I H Altun
- Department of Pharmacology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - B Sezgi
- Department of Pharmaceutical Sciences, Medicinal Chemistry and Chemical Biology Section, β-Faculty, Utrecht University, Utrecht, Netherlands
| | - S Süzgeç-Selçuk
- Department of Pharmacognosy, Faculty of Pharmacy, Marmara University, Turkey
| | - A Mat
- Department of Pharmacognosy, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| | - B S Uydeş-Doǧan
- Department of Pharmacology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey
| |
Collapse
|
13
|
Boydens C, Pauwels B, Decaluwé K, Brouckaert P, Van de Voorde J. Relaxant and Antioxidant Capacity of the Red Wine Polyphenols, Resveratrol and Quercetin, on Isolated Mice Corpora Cavernosa. J Sex Med 2015; 12:303-12. [DOI: 10.1111/jsm.12786] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
|
14
|
Zhao Y, Chen BN, Wang SB, Wang SH, Du GH. Vasorelaxant effect of formononetin in the rat thoracic aorta and its mechanisms. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2012; 14:46-54. [PMID: 22263593 DOI: 10.1080/10286020.2011.628939] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The purpose of the present study was to investigate the effect of formononetin and the related mechanisms on isolated rat thoracic aorta. Formononetin concentration dependently relaxed aortic rings precontracted with norepinephrine (NE, 1 μM) or KCl (80 mM). Pretreatment with formononetin noncompetitively inhibited contractile responses of aortas to NE and KCl. The vasorelaxant effect of formononetin partially relied on intact endothelia, which was significantly attenuated by incubation with N(ω)-nitro-L-arginine methyl ester (100 μM). In endothelium-denuded rings, glibenclamide (10 μM) and tetraethylammonium (5 mM) showed slight reduction in the vasorelaxant effect of formononetin. Moreover, formononetin reduced NE-induced transient contraction in Ca²⁺-free solution and inhibited the vasocontraction induced by increasing external calcium in medium plus 80 mM KCl. Our results suggested that formononetin induced relaxation in rat aortic rings through an endothelium-dependent manner via nitric oxide synthesis pathway, and also involving an endothelium-independent vasodilatation by the blockade of Ca²⁺ channels. The opening of K⁺ channels might also be one of the mechanisms of formononetin-induced vasorelaxation.
Collapse
Affiliation(s)
- Yan Zhao
- National Centre for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
| | | | | | | | | |
Collapse
|
15
|
Angelone T, Pasqua T, Di Majo D, Quintieri AM, Filice E, Amodio N, Tota B, Giammanco M, Cerra MC. Distinct signalling mechanisms are involved in the dissimilar myocardial and coronary effects elicited by quercetin and myricetin, two red wine flavonols. Nutr Metab Cardiovasc Dis 2011; 21:362-371. [PMID: 20096547 DOI: 10.1016/j.numecd.2009.10.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 09/29/2009] [Accepted: 10/19/2009] [Indexed: 11/19/2022]
Abstract
BACKGROUND AND AIMS Moderate red wine consumption associates with lower incidence of cardiovascular diseases. Attention to the source of this cardioprotection was focused on flavonoids, the non-alcoholic component of the red wine, whose intake inversely correlates with adverse cardiovascular events. We analysed whether two red wine flavonoids, quercetin and myricetin, affect mammalian basal myocardial and coronary function. METHODS AND RESULTS Quercetin and myricetin effects were evaluated on isolated and Langendorff perfused rat hearts under both basal conditions and α- and β-adrenergic stimulation. The intracellular signalling involved in the effects of these flavonoids was analysed on perfused hearts and by western blotting on cardiac and HUVEC extracts. Quercetin induced biphasic inotropic and lusitropic effects, positive at lower concentrations and negative at higher concentrations. Contrarily, Myricetin elicits coronary dilation, without affecting contractility and relaxation. Simultaneous administration of the two flavonoids only induced vasodilation. Quercetin-elicited positive inotropism and lusitropism depend on β1/β2-adrenergic receptors and associate with increased intracellular cAMP, while the negative inotropism and lusitropism observed at higher concentrations were α-adrenergic-dependent. NOS inhibition abolished Myricetin-elicited vasodilation, also inducing Akt, ERK1/2 and eNOS phosphorylation in both ventricles and HUVEC. Myricetin-dependent vasodilation increases intracellular cGMP and is abolished by triton X-100. CONCLUSIONS The cardiomodulation elicited on basal mechanical performance by quercetin and the selective vasodilation induced by myricetin point to these flavonoids as potent cardioactive principles, able to protect the heart in the presence of cardiovascular diseases.
Collapse
Affiliation(s)
- T Angelone
- Lab of Cardiovascular Pathophysiology, Dept of Cell Biology, University of Calabria, 87030 Arcavacata di Rende (CS), Italy.
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Capasso R, Aviello G, Romano B, Atorino G, Pagano E, Borrelli F. Inhibitory effect of quercetin on rat trachea contractility in vitro. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.01.0016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
The effect of quercetin, a naturally occurring flavonoid traditionally used to treat airway diseases such as bronchial asthma, on the contractile response elicited by electrical field stimulation or carbachol in rat isolated trachea was investigated.
Methods
Isolated tracheal tissue was subjected to contractions by an electrical field stimulation of 5 Hz for 30 s, 400 mA, and the responses in the presence of cumulative concentrations of quercetin (10−6−3 × 10−4 M) were observed. The effect of quercetin was also evaluated after administration of phentolamine plus propranolol (to block α- and β-adrenergic receptors), NG-nitro-L-arginine methyl ester (to block nitric oxide synthesis), capsaicin (to desensitise sensory C fibres), α-chymotrypsin (a proteolytic enzyme that rapidly degrades vasoactive intestinal peptide), SR140333 and SR48968 (tackykinin NK1 and NK2 receptor antagonists, respectively).
Key findings
Quercetin produced a concentration-dependent inhibition of contractions induced by both carbachol and electrical field stimulation. However, quercetin was more active in inhibiting the contractions produced by electrical field stimulation than those induced by carbachol, suggesting a presynaptic site of action (in addition to a postsynaptic effect, as revealed by the inhibitory action of quercetin on carbachol-induced contractions). The inhibitory effect of quercetin on contractions induced by electrical field stimulation was unaffected by phentolamine plus propranolol, SR 140333 and SR 48968, capsaicin treatment or by the proteolytic enzyme α-chymotrypsin. In contrast, the nitric oxide synthase inhibitor NG-nitro-L-arginine methyl ester significantly reduced the inhibitory effect of quercetin on contractions induced by electrical field stimulation.
Conclusions
Quercetin inhibits rat tracheal contractility through a presynaptic (involving nitric oxide) and a postsynaptic site of action.
Collapse
Affiliation(s)
- Raffaele Capasso
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| | - Gabriella Aviello
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| | - Barbara Romano
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| | - Giuseppina Atorino
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| | - Ester Pagano
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| | - Francesca Borrelli
- Department of Experimental Pharmacology, University of Naples Federico II, Naples, Italy
| |
Collapse
|
17
|
Schini-Kerth VB, Auger C, Etienne-Selloum N, Chataigneau T. Polyphenol-induced endothelium-dependent relaxations role of NO and EDHF. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2010; 60:133-75. [PMID: 21081218 DOI: 10.1016/b978-0-12-385061-4.00006-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Mediterranean diet has been associated with greater longevity and quality of life in epidemiological studies. Indeed, because of the abundance of fruits and vegetables and a moderate consumption of wine, the Mediterranean diet provides high amounts of polyphenols thought to be essential bioactive compounds that might provide health benefits in terms of cardiovascular diseases and mortality. Several polyphenol-rich sources, such as grape-derived products, cocoa, and tea, have been shown to decrease mean blood pressure in patients with hypertension. The improvement of the endothelial function is likely to be one of the mechanisms by which polyphenols may confer cardiovascular protection. Indeed, polyphenols are able to induce nitric oxide (NO)-mediated endothelium-dependent relaxations in a large number of arteries including the coronary artery; they can also induce endothelium-derived hyperpolarizing factor (EDHF)-mediated relaxations in some of these arteries. Altogether, these mechanisms might contribute to explain the antihypertensive and cardio-protective effects of polyphenols in vivo. The aim of this review was to provide a nonexhaustive analysis of the effect of several polyphenol-rich sources and isolated compounds on the endothelium in in vitro, ex vivo, and in vivo models as well as in humans.
Collapse
Affiliation(s)
- Valérie B Schini-Kerth
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
| | | | | | | |
Collapse
|
18
|
Machha A, Achike FI, Mustafa AM, Mustafa MR. Quercetin, a flavonoid antioxidant, modulates endothelium-derived nitric oxide bioavailability in diabetic rat aortas. Nitric Oxide 2007; 16:442-7. [PMID: 17513143 DOI: 10.1016/j.niox.2007.04.001] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2006] [Revised: 03/07/2007] [Accepted: 04/13/2007] [Indexed: 10/23/2022]
Abstract
The present work examined the effect of chronic oral administration of quercetin, a flavonoid antioxidant, on blood glucose, vascular function and oxidative stress in STZ-induced diabetic rats. Male Wistar-Kyoto (WKY) rats were randomized into euglycemic, untreated diabetic, vehicle (1% w/v methylcellulose)-treated diabetic, which served as control, or quercetin (10mgkg(-1) body weight)-treated diabetic groups and treated orally for 6 weeks. Quercetin treatment reduced blood glucose level in diabetic rats. Impaired relaxations to endothelium-dependent vasodilator acetylcholine (ACh) and enhanced vasoconstriction responses to alpha(1)-adrenoceptor agonist phenylephrine (PE) in diabetic rat aortic rings were restored to euglycemic levels by quercetin treatment. Pretreatment with N(omega)-nitro-l-arginine methyl ester (l-NAME, 10microM) or methylene blue (10microM) completely blocked but indomethacin (10microM) did not affect relaxations to ACh in aortic rings from vehicle- or quercetin-treated diabetic rats. PE-induced vasoconstriction with an essentially similar magnitude in vehicle- or quercetin-treated diabetic rat aortic rings pretreated with l-NAME (10microM) plus indomethacin (10microM). Quercetin treatment reduced plasma malonaldehyde (MDA) plus 4-hydroxyalkenals (4-HNE) content as well as increased superoxide dismutase activity and total antioxidant capacity in diabetic rats. From the present study, it can be concluded that quercetin administration to diabetic rats restores vascular function, probably through enhancement in the bioavailability of endothelium-derived nitric oxide coupled to reduced blood glucose level and oxidative stress.
Collapse
Affiliation(s)
- Ajay Machha
- Department of Pharmacology, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | | | | | | |
Collapse
|
19
|
Zhu XM, Fang LH, Li YJ, Du GH. Endothelium-dependent and -independent relaxation induced by pinocembrin in rat aortic rings. Vascul Pharmacol 2006; 46:160-5. [PMID: 17074538 DOI: 10.1016/j.vph.2006.09.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2006] [Revised: 07/21/2006] [Accepted: 09/15/2006] [Indexed: 11/28/2022]
Abstract
The aim of present study was to evaluate the vasorelaxant effects of the flavonone pinocembrin and its possible mechanisms in isolated rat aortic rings. Pinocembrin (5 approximately 100 microM) induced relaxation in aortic rings pre-contracted with norepinephrine (NE, 1 microM) or KCl (60 mM), with pEC(50) value 4.37+/-0.02 and 4.52+/-0.04. Pretreatment with pinocembrin (30 or 50 microM) also inhibited contractile responses to NE and KCl. The vasorelaxant effect of pinocembrin relied on intact endothelium partially, and incubation with n(omega)-nitro-l-arginine methyl ester (l-NAME, 100 microM) or methylene blue (10 microM) significantly inhibited the effect, however indomethacin (5 microM) had no influence on the action. In endothelium-denuded rings, the vasorelaxant effect of pinocembrin was reduced by glibenclamide (10 microM), tetraethylammonium (5 mM) and 4-aminopyridine (100 microM). Pinocembrin also reduced NE-induced transient contraction in Ca(2+)-free solution and inhibited contraction induced by increasing external calcium in Ca(2+)-free medium plus 60 mM KCl. Our results suggest that pinocembrin induces relaxation in rat aortic rings through an endothelium-dependent pathway, involving NO-cGMP, and also through an endothelium-independent pathway, opening K(+) channels and blockade of Ca(2+) channels.
Collapse
Affiliation(s)
- Xiao-Ming Zhu
- National Center for Pharmaceutical Screening, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | | | | | | |
Collapse
|
20
|
Ajay M, Achike FI, Mustafa AM, Mustafa MR. Effect of quercetin on altered vascular reactivity in aortas isolated from streptozotocin-induced diabetic rats. Diabetes Res Clin Pract 2006; 73:1-7. [PMID: 16378655 DOI: 10.1016/j.diabres.2005.11.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2005] [Accepted: 11/21/2005] [Indexed: 10/25/2022]
Abstract
The present work examined ex vivo the acute effect of quercetin on diabetic rat aortic ring reactivity in response to endothelium-dependent (acetylcholine, ACh) and endothelium-independent (sodium nitroprusside, SNP) relaxants, and to the alpha(1)-adrenergic agonist phenylephrine (PE). Responses were compared to those of aortic rings from age- and sex-matched euglycemic rats. Compared to euglycemic rat aortic rings, diabetic rings showed less relaxation in response to ACh and SNP, and greater contraction in response to PE. Pretreatment with quercetin (10microM, 20min) increased ACh-induced relaxation and decreased PE-induced contraction in diabetic, but did not affect euglycemic rat aortic ring responses. Following pretreatment with the nitric oxide synthase inhibitor Nomega-nitro-l-arginine methyl ester (l-NAME, 10microM), quercetin reduced PE-induced contractions in both aortic ring types, although l-NAME attenuated the reduction in the diabetic rings. Quercetin did not alter SNP vasodilatory effects in either ring type compared to their respective controls. These findings indicate that quercetin acutely improved vascular responsiveness in blood vessels from diabetic rats, and that these effects were mediated, at least in part, by enhanced endothelial nitric oxide bioavailability. These effects of quercetin suggest the possible beneficial effects of quercetin in vivo in experimental diabetes and possibly in other cardiovascular diseases.
Collapse
Affiliation(s)
- Machha Ajay
- Department of Pharmacology, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia
| | | | | | | |
Collapse
|