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Valero MS, Nuñez S, Les F, Castro M, Gómez-Rincón C, Arruebo MP, Plaza MÁ, Köhler R, López V. The Potential Role of Everlasting Flower ( Helichrysum stoechas Moench) as an Antihypertensive Agent: Vasorelaxant Effects in the Rat Aorta. Antioxidants (Basel) 2022; 11:antiox11061092. [PMID: 35739989 PMCID: PMC9219724 DOI: 10.3390/antiox11061092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 05/26/2022] [Accepted: 05/27/2022] [Indexed: 02/04/2023] Open
Abstract
Helichrysum stoechas (L.) Moench (H. stoechas) is a medicinal plant traditionally used in the Iberian Peninsula to treat different disorders such as arterial hypertension. The aim of this study was to investigate the vascular effects of a polyphenolic methanolic extract of H. stoechas, which has high antioxidant activity, and its mechanism of action. Isometric myography studies were performed in an organ bath with rat aortic rings with intact endothelium. The H. stoechas extract produced vasorelaxation in the aortic rings that were precontracted by phenylephrine or KCl. L-NAME and Rp-8-Br-PET-cGMPS but not indomethacin or H-89; it also reduced the relaxant response evoked by H. stoechas extract on the phenylephrine-induced contractions. H. stoechas extract reduced the response to CaCl2 similar to verapamil and reduced the phenylephrine-induced contractions comparable with heparin. TRAM-34, apamin and glibenclamide reduced relaxation induced by the H. stoechas extract. The combination of L-NAME+TRAM-34+apamin almost completely inhibited the H. stoechas-induced effect. In conclusion, the relaxant effect of the H. stoechas extract is partially mediated by endothelium through the activation of the NO/PKG/cGMP pathway and the opening of Ca2+-activated K+ channels. Furthermore, the decrease in the cytosolic Ca2+ by the inhibition of Ca2+ influx through the L-type Ca2+ channels and by the reduction of Ca2+ release from the sarcoplasmic reticulum via the IP3 pathway is also involved.
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Affiliation(s)
- Marta Sofía Valero
- Departamento de Farmacología, Fisiología y Medicina Legal y Forense, Universidad de Zaragoza, 50009 Zaragoza, Spain; (M.C.); (M.P.A.); (M.Á.P.)
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Correspondence: (M.S.V.); (V.L.); Tel.: +34-974-239408 (M.S.V. & V.L.)
| | - Sonia Nuñez
- Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gállego, 50830 Zaragoza, Spain;
| | - Francisco Les
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gállego, 50830 Zaragoza, Spain;
| | - Marta Castro
- Departamento de Farmacología, Fisiología y Medicina Legal y Forense, Universidad de Zaragoza, 50009 Zaragoza, Spain; (M.C.); (M.P.A.); (M.Á.P.)
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
| | - Carlota Gómez-Rincón
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gállego, 50830 Zaragoza, Spain;
| | - María Pilar Arruebo
- Departamento de Farmacología, Fisiología y Medicina Legal y Forense, Universidad de Zaragoza, 50009 Zaragoza, Spain; (M.C.); (M.P.A.); (M.Á.P.)
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
| | - Miguel Ángel Plaza
- Departamento de Farmacología, Fisiología y Medicina Legal y Forense, Universidad de Zaragoza, 50009 Zaragoza, Spain; (M.C.); (M.P.A.); (M.Á.P.)
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Instituto de Investigación Sanitaria Aragón (IIS Aragón), 50009 Zaragoza, Spain
| | - Ralf Köhler
- Instituto Aragonés de Ciencias de la Salud (IACS), Agencia Aragonesa de Investigación y Desarrollo (ARAID), 50009 Zaragoza, Spain;
| | - Víctor López
- Instituto Agroalimentario de Aragón, IA2, Universidad de Zaragoza-CITA, 50830 Zaragoza, Spain; (F.L.); (C.G.-R.)
- Facultad de Ciencias de la Salud, Universidad San Jorge, Villanueva de Gállego, 50830 Zaragoza, Spain;
- Correspondence: (M.S.V.); (V.L.); Tel.: +34-974-239408 (M.S.V. & V.L.)
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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.
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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.)
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Quercetin Relieves the Excised Great Saphenous Vein Oxidative Damage and Inflammatory Reaction. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2021:6251559. [PMID: 35003306 PMCID: PMC8741364 DOI: 10.1155/2021/6251559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 11/13/2021] [Accepted: 11/19/2021] [Indexed: 12/03/2022]
Abstract
Objective The patency and quality of transplanted great saphenous vein (GSV) can seriously influence the physical state and life quality of patients who accepted the coronary artery bypass grafting (CABG). Quercetin is known for antioxidant, antithrombotic, anti-inflammatory, and antitumor properties. In this study, we examined the protection of quercetin to the great saphenous vein from oxidative and inflammatory damage. Methods The GSVs were collected from 15 patients undergoing CABG and cultured. Treated the veins by H2O2 and detected the NO, SOD, and MDA content by the relevant kits to explore the quercetin protection against oxidative damage. Then, for another group of GSVs, sheared them and detected the inflammatory cytokines, such as IL-6, TNFα, CCL20, PCNA, and VEGF. Collect the veins for H&E staining and PCNA and VEGF immunofluorescent staining. Results Pretreatment by quercetin reduced the production of NO and MDA induced by H2O2, and increased SOD activity. Quercetin also supressed the mRNA expressions of IL-6, TNFα after mechanical damage and had no influence on CCL20 and VEGF. Consistent with the lower expression of PCNA treated by quercetin, the vein intima was thinner. Conclusion These results demonstrated that quercetin protects GSVs by reducing the oxidative damage and inflammatory response and also suppresses the abnormal thickening of venous endothelium by inhibiting cell proliferation. It reminded that, to some extent, quercetin has the potential to release the great saphenous vein graft damage.
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Souto CGRG, Lorençone BR, Marques AAM, Palozi RAC, Romão PVM, Guarnier LP, Tirloni CAS, Dos Santos AC, Souza RIC, Zago PMJJ, Lívero FADR, Lourenço ELB, Silva DB, Gasparotto Junior A. Cardioprotective effects of Talinum paniculatum (Jacq.) Gaertn. in doxorubicin-induced cardiotoxicity in hypertensive rats. JOURNAL OF ETHNOPHARMACOLOGY 2021; 281:114568. [PMID: 34461188 DOI: 10.1016/j.jep.2021.114568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 08/21/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Talinum paniculatum (Jacq.) Gaertn. (Talinaceae) is a medicinal species that is widely distributed throughout Brazil. Popularly known as "major-gomes," the species is used in folk medicine for the treatment of cardiovascular disorders. AIM OF THE STUDY To evaluate the effect of an ethanolic extract of T. paniculatum (EETP) in rats with renovascular hypertension and heart failure and determine its chemical composition. MATERIALS AND METHODS First, EETP was obtained, and its chemical profile was analyzed by LC-DAD-MS. The acute toxicity was evaluated in female Wistar rats. The model of renovascular hypertension was established in male Wistar rats by combining the Goldblatt 2K1C method and intraperitoneal doxorubicin administration for 6 weeks. The animals were then treated daily with EETP (30, 100, and 300 mg/kg) or metoprolol (25 mg/kg) by gavage for 28 days. The negative control group was treated with vehicle (filtered water). The sham group consisted of animals that were not subjected to 2K1C or cardiotoxicity and were treated with vehicle. Renal function was evaluated on days 1, 14, and 28. At the end of treatment, the electrocardiographic profile, blood pressure, and mesenteric vascular reactivity were investigated. Serum urea, creatinine, angiotensin converting enzyme, nitrotyrosine, malondialdehyde, nitrite, aldosterone, and sodium and potassium levels were measured. The heart, aorta artery, liver, and right kidney were collected, weighed, and processed for histopathological analysis. Cardiac chambers also underwent morphometric analysis. RESULTS No signs of toxicity were observed in female Wistar rats. Thirty-two compounds were annotated from EETP, including flavonoids, chlorogenic acids, and saponins. EETP treatment resulted in a significant cardiorenal-protective response, normalizing electrocardiographic and hemodynamic alterations, and preventing ventricle remodeling. These effects were associated with serum antioxidant activity and angiotensin-converting enzyme (ACE) inhibition. CONCLUSION The present study demonstrated that EETP may exert cardioprotective effects through serum antioxidant activity and ACE inhibition, preventing alterations of hemodynamic and endothelial function, and reducing damage to cardiac structure. Thus, EETP, especially at the 100 and 300 mg/kg doses, may be useful for preventing doxorubicin-induced cardiotoxicity in hypertensive patients.
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Affiliation(s)
| | - Bethânia Rosa Lorençone
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Aline Aparecida Macedo Marques
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Rhanany Alan Calloi Palozi
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Paulo Vitor Moreira Romão
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Lucas Pires Guarnier
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Cleide Adriane Signor Tirloni
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Ariany Carvalho Dos Santos
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | - Roosevelt Isaías Carvalho Souza
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil
| | | | | | | | - Denise Brentan Silva
- Laboratory of Natural Products and Mass Spectrometry (LaPNEM), Faculty of Pharmaceutical Sciences, Food and Nutrition (FACFAN), Federal University of Mato Grosso Do Sul, Campo Grande, MS, Brazil
| | - Arquimedes Gasparotto Junior
- Laboratory of Cardiovascular Pharmacology (LaFaC), Faculty of Health Sciences, Federal University of Grande Dourados, Dourados, MS, Brazil.
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Calfío C, Donoso F, Huidobro‐Toro JP. Anthocyanins Activate Membrane Estrogen Receptors With Nanomolar Potencies to Elicit a Nongenomic Vascular Response Via NO Production. J Am Heart Assoc 2021; 10:e020498. [PMID: 34350775 PMCID: PMC8475021 DOI: 10.1161/jaha.119.020498] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 06/11/2021] [Indexed: 11/16/2022]
Abstract
Background The vascular pharmacodynamics of anthocyanins is only partially understood. To examine whether the anthocyanin-induced vasorelaxation is related to membrane estrogen receptor activity, the role of ERα or GPER antagonism was ascertained on anthocyanins or 17-β estradiol-(E2) induced vasodilatations and NO production. Methods and Results The rat arterial mesenteric bed was perfused with either anthocyanins or corresponding 3-O-glycosides, or E2, to examine rapid concentration-dependent vasorelaxations. The luminally accessible fraction of NO in mesenteric perfusates before and after anthocyanins or E2 administration was quantified. Likewise, NO-DAF signal detected NO production in primary endothelial cells cultures incubated with anthocyanins or E2 in the absence and presence of ERα (ICI 182,780) or GPER (G-36) selective antagonists. Anthocyanins or corresponding glycosides elicited, within minutes, vasodilation with nanomolar potencies; half maximal anthocyanin response reached 50% to 60% efficacy, in contrast to acetylcholine. The vasorelaxation is of rapid onset and exclusively endothelium-dependent; NOS inhibition annulled the vasorelaxation. The delphinidin vascular response was not modified by 100 nmol/L atropine but significantly attenuated by joint application of ICI plus G-36 (52±4.6 versus 8.5±1.5%), revealing the role of membrane estrogen receptors. Moreover, the anthocyanin or E2-induced NO production was antagonized up to 70% by these antagonists. NO-DAF signal elicited by anthocyanins was annulled by NOS inhibition or by ICI plus G-36 addition. Conclusions The biomedical effect of anthocyanins or 3-O-glycosylates derivatives contained in naturally purple-colored foods or berries is due to increased NO production, and not to the phytochemical's antioxidant potential, highlighting the nutraceutical role of natural products in cardiovascular diseases.
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Affiliation(s)
- Camila Calfío
- Laboratorio de FarmacologíaDepartamento de BiologíaFacultad de Química y BiologíaUniversidad de Santiago de ChileSantiagoChile
| | - Francisca Donoso
- Laboratorio de FarmacologíaDepartamento de BiologíaFacultad de Química y BiologíaUniversidad de Santiago de ChileSantiagoChile
| | - J. Pablo Huidobro‐Toro
- Laboratorio de FarmacologíaDepartamento de BiologíaFacultad de Química y BiologíaUniversidad de Santiago de ChileSantiagoChile
- Centro Desarrollo de Nanociencias y Nanotecnología, CEDENNASantiagoChile
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Ferreira LLDM, Leão VDF, de Melo CM, Machado TDB, Amaral ACF, da Silva LL, Simas NK, Muzitano MF, Leal ICR, Raimundo JM. Ethyl Acetate Fraction and Isolated Phenolics Derivatives from Mandevilla moricandiana Identified by UHPLC-DAD-ESI-MS n with Pharmacological Potential for the Improvement of Obesity-Induced Endothelial Dysfunction. Pharmaceutics 2021; 13:pharmaceutics13081173. [PMID: 34452134 PMCID: PMC8401510 DOI: 10.3390/pharmaceutics13081173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/21/2021] [Accepted: 07/26/2021] [Indexed: 01/11/2023] Open
Abstract
Endothelial dysfunction in obesity plays a key role in the development of cardiovascular diseases, and it is characterized by increased vascular tonus and oxidative stress. Thus, this study aimed to investigate the vasodilatory and antioxidant activities of Mandevilla moricandiana ethyl acetate fraction and subfractions. Vascular effects were investigated on aorta isolated from control and monosodium glutamate (MSG) induced-obese Wistar rats, and antioxidant activity was assessed by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and oxygen radical absorbance capacity (ORAC) methods. The ethyl acetate fraction (MMEAF) induced a concentration-dependent vasodilation on aortic rings through the NO pathway, with the involvement of histamine H1 and estrogen ERα receptors and showed potent antioxidant activity. In aorta of MSG obese rats, maximal relaxation to acetylcholine was increased in the presence of MMEAF (3 µg/mL), indicating that MMEAF ameliorated obesity-induced endothelial dysfunction. Quercetin and kaempferol aglycones and their correspondent glycosides, as well as caffeoylquinic acid derivatives, A-type procyanidin trimer, ursolic and oleanolic triterpenoid acids were identified in subfractions from MMEAF and seem to be the metabolites responsible for the vascular and antioxidant activities of this fraction.
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Affiliation(s)
- Leticia L. D. M. Ferreira
- Pharmacology of Bioactive Products Research Group, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27930-560, RJ, Brazil; (L.L.D.M.F.); (V.d.F.L.); (C.M.d.M.); (L.L.d.S.)
- Laboratory of Natural Products and Biological Assays, Pharmacy Faculty, Health Sciences Center, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Valéria de F. Leão
- Pharmacology of Bioactive Products Research Group, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27930-560, RJ, Brazil; (L.L.D.M.F.); (V.d.F.L.); (C.M.d.M.); (L.L.d.S.)
| | - Cinthya M. de Melo
- Pharmacology of Bioactive Products Research Group, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27930-560, RJ, Brazil; (L.L.D.M.F.); (V.d.F.L.); (C.M.d.M.); (L.L.d.S.)
| | - Thelma de B. Machado
- LAQV-REQUIMTE, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal;
- Faculty of Pharmacy, Federal Fluminense University, Niterói 24241-000, RJ, Brazil
| | - Ana Claudia F. Amaral
- Laboratory of Medicinal Plants and Derivatives, Farmanguinhos, Oswaldo Cruz Foundation, Rio de Janeiro 21041-250, RJ, Brazil;
| | - Leandro L. da Silva
- Pharmacology of Bioactive Products Research Group, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27930-560, RJ, Brazil; (L.L.D.M.F.); (V.d.F.L.); (C.M.d.M.); (L.L.d.S.)
| | - Naomi K. Simas
- Laboratory of Natural Products and Biological Assays, Pharmacy Faculty, Health Sciences Center, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
| | - Michelle F. Muzitano
- Laboratory of Bioactive Products, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27933-378, RJ, Brazil;
| | - Ivana C. R. Leal
- Laboratory of Natural Products and Biological Assays, Pharmacy Faculty, Health Sciences Center, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil;
- Correspondence: (I.C.R.L.); (J.M.R.); Tel.: +55-21965620428 (I.C.R.L.); +55-2221414019 (J.M.R.)
| | - Juliana M. Raimundo
- Pharmacology of Bioactive Products Research Group, Federal University of Rio de Janeiro—Macaé Campus, Macaé 27930-560, RJ, Brazil; (L.L.D.M.F.); (V.d.F.L.); (C.M.d.M.); (L.L.d.S.)
- Correspondence: (I.C.R.L.); (J.M.R.); Tel.: +55-21965620428 (I.C.R.L.); +55-2221414019 (J.M.R.)
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Liu L, Huang S, Xu M, Gong Y, Li D, Wan C, Wu H, Tang Q. Isoquercitrin protects HUVECs against high glucose‑induced apoptosis through regulating p53 proteasomal degradation. Int J Mol Med 2021; 48:122. [PMID: 33982778 PMCID: PMC8121554 DOI: 10.3892/ijmm.2021.4955] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 04/12/2021] [Indexed: 02/06/2023] Open
Abstract
High glucose (HG)-induced endothelial apoptosis serves an important role in the vascular dysfunction associated with diabetes mellitus (DM). It has been reported that isoquercitrin (IQC), a flavonoid glucoside, possesses an anti-DM effect, but the mechanism requires further investigation. The present study investigated the effect of IQC against HG-induced apoptosis in human umbilical vein endothelial cells (HUVECs) and explored its molecular mechanism. HUVECs were treated with 5 or 30 mM glucose for 48 h. Endothelial cell viability was monitored using the Cell Counting Kit-8 assay. Mitochondrial membrane potential was detected by JC-1 staining. Apoptosis was observed by TUNEL staining and flow cytometry. Western blotting was used for the analysis of apoptosis-associated proteins Bax, Bcl-2, cleaved (C)-caspase3, total-caspase3, p53 and phosphorylated p53. Reverse transcription-quantitative PCR was used to analyze the mRNA expression levels of Bax, Bcl-2 and p53. Immunofluorescence staining was utilized to detect the expression levels and distribution of p53 and ubiquitin specific peptidase 10 (USP10) in HUVECs. The results revealed that IQC significantly attenuated HG-induced endothelial apoptosis, as shown by decreased apoptotic cells observed by TUNEL, JC-1 staining and flow cytometry. Moreover, under HG stress, IQC treatment markedly inhibited the increased expression levels of the pro-apoptotic proteins p53, Bax and C-caspase3, and increased the expression levels of the anti-apoptotic protein Bcl-2 in HUVECs. However, the anti-apoptotic effect of IQC against HG was partially blunted by increasing p53 protein levels in vitro. IQC influenced the mRNA expression levels of Bax and Bcl-2 in response to HG, but it did not affect the transcription of p53. Notably, IQC inhibited the HG-induced phosphorylation of p53 at Ser15 and the nuclear transport of USP10, destabilizing p53 and increasing the proteasomal degradation of the p53 protein. The current findings revealed that IQC exerted a protective effect against the HG-induced apoptosis of endothelial cells by regulating the proteasomal degradation of the p53 protein, suggesting that IQC may be used as a novel therapeutic compound to ameliorate DM-induced vascular complications.
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Affiliation(s)
- Libo Liu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Sihui Huang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Man Xu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Yan Gong
- Pharmacy Department, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Dan Li
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Chunxia Wan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Haiming Wu
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Qizhu Tang
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, P.R. China
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Yilmaz-Oral D, Onder A, Kaya-Sezginer E, Oztekin CV, Zor M, Gur S. Restorative effects of red onion (Allium cepa L.) juice on erectile function after-treatment with 5α-reductase inhibitor in rats. Int J Impot Res 2021; 34:269-276. [PMID: 33820978 DOI: 10.1038/s41443-021-00421-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 01/28/2021] [Accepted: 02/18/2021] [Indexed: 01/22/2023]
Abstract
Benign prostatic hyperplasia (BPH) is one of the most prevalent conditions among aged men. The use of 5α-reductase inhibitors (5-ARIs) to treat BPH was linked to erectile dysfunction (ED). Many medicinal plants and secondary metabolites are used in the management of ED. Onion (Allium cepa L.) is an economically affordable vegetable with vital phytochemicals and biological functions. The study aimed to identify the beneficial effects of onion juice on dutasteride (a 5-ARI)-induced ED. Rats were divided into two groups (n = 5 per group): control and dutasteride-treated rats (0.5 mg/kg/day). Dutasteride was administered in drinking water for 12 weeks. Experiments were performed at the end of the 12th week. In vivo erectile responses were measured before and after intracavernosal injection of onion. Relaxant responses to onion juice were examined in the corpus cavernosum (CC). Acetylcholine (ACh)-, electrical field stimulation (EFS)-, sodium nitroprusside (SNP)-induced relaxation responses in CC tissues were evaluated in the absence and presence of onion juice. Total intracavernosal pressure (ICP) and ICP/ mean arterial pressure were significantly reduced in dutasteride-treated rats (1881.14 ± 249.72 mmHg, P < 0.001;0.26 ± 0.03, P < 0.01) as compared to control rats (4542.60 ± 429.19 mmHg, 0.51 ± 0.05), which was normalized after the intracavernous administration of onion (3288.60 ± 185.45 mmHg, 0.58 ± 0.04). Onion markedly induced relaxant responses in control (72.5 ± 4.7) and dutasteride-treated (66.5 ± 2.7) groups after precontraction with phenylephrine. Relaxation responses to onion were partially inhibited after precontraction with KCl (32.5 ± 3.1, P < 0.001). The relaxant responses to ACh (14.9 ± 4.2, P < 0.01) were diminished in dutasteride-treated CC) compared to control CC (59.8 ± 3.4), which was enhanced after the incubation with onion (36.6 ± 4.8). There were no differences in relaxation response to SNP among all groups. However, relaxation response to SNP was reduced in dutasteride-treated CC at 1 μM (P < 0.05) and 10 μM dosages (P < 0.001), which was partially increased after the incubation with onion at 10 μM dosage (P < 0.01). The presence of onion did not change the reduction in EFS-caused relaxation in the dutasteride-treated group. The current data suggest that red onion juice has a restorative effect on erectile function and endothelium-dependent relaxation response following the treatment of dutasteride.
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Affiliation(s)
- Didem Yilmaz-Oral
- Department of Pharmacology, Faculty of Pharmacy, Cukurova University, Adana, Turkey
| | - Alev Onder
- Department of Pharmacognosy, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - Ecem Kaya-Sezginer
- Department of Biochemistry, Faculty of Pharmacy, Ankara University, Ankara, Turkey
| | - Cetin Volkan Oztekin
- Department of Urology, Faculty of Medicine, University of Kyrenia, Girne-TRNC, Mersin, 10, Turkey
| | - Murat Zor
- Department of Pharmacognosy, Faculty of Pharmacy, Lokman Hekim University, Ankara, Turkey
| | - Serap Gur
- Department of Pharmacology, Faculty of Pharmacy, Ankara University, Ankara, Turkey.
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Atheroprotective Properties of Costus spicatus (Jacq.) Sw. in Female Rats. Life (Basel) 2021; 11:life11030212. [PMID: 33800454 PMCID: PMC8001518 DOI: 10.3390/life11030212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/25/2021] [Accepted: 03/02/2021] [Indexed: 01/22/2023] Open
Abstract
Background: Costus spicatus (Jacq.) Sw. is a medicinal species frequently prescribed for the treatment of cardiovascular diseases. This study aims to evaluate the effects of this species against the development of atherosclerosis. Methods: First, an anatomical study of the C. spicatus leaves was performed. Then, the extract (ESCS) was obtained and submitted to phytochemical analysis. Female rats were treated with a single dose of ESCS (2000 mg/kg) to assess acute toxicity. Other groups of female rats received an atherogenic diet for 60 days. After 30 days, the animals were treated orally with ESCS (30 and 300 mg/kg), rosuvastatin (5 mg/kg), or vehicle once daily for 30 days. Serum lipids oxidized low-density lipoprotein, soluble adhesion molecules, interleukins 1β and 6, and markers of renal and liver function were measured. Renal function, blood pressure, electrocardiography, and vascular reactivity were also evaluated. Arteries, heart, liver, and kidney were also collected to evaluate the tissue redox state and histopathological analysis. Results: Prolonged treatment with ESCS induces significant hypolipidemic and antioxidant effects, that prevent endothelial dysfunction and modulated the local inflammatory process, reducing the evolution of the atherosclerotic disease. Conclusions: This study provides a scientific basis for the popular use of C. spicatus for the treatment of atherosclerosis.
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de Souza P, Mariano LNB, Cechinel-Zanchett CC, Cechinel-Filho V. Promising Medicinal Plants with Diuretic Potential Used in Brazil: State of the Art, Challenges, and Prospects. PLANTA MEDICA 2021; 87:24-37. [PMID: 32957146 DOI: 10.1055/a-1257-0887] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Medicinal plants are used in traditional medicine to treat a wide range of ailments. The knowledge of them is handed down from generation to generation and is described in several pharmacopoeia and in the general literature. The immense biodiversity of the Brazilian flora, covering about 25% of all plant species worldwide, makes Brazil a huge potential source of medicinal plants. Indeed, many of these plant species are already used in the Brazilian ethnopharmacology for their probable effect to induce diuresis, to reduce fluid retention, and to treat cardiovascular and renal disorders. This review article describes and discusses the main native Brazilian medicinal plants (including some of their isolated compounds) used as diuretics. It also gives a comprehensive analysis of the most relevant scientific studies presented to date, as well as addressing a special topic with future prospects for plant species that have not yet been scientifically studied. In brief, several plants can be indicated for more detailed study, with a view to obtain scientific subsidies for a new and effective diuretic medicine in the future. These include Bauhinia forficata, Leandra dasytricha, and Tropaeolum majus. Other species have reputed medicinal properties but lack experimental assays to demonstrate their pharmacological effects (e.g., Mikania hirsutissima, Phyllanthus niruri, and Tagetes minuta). Several active principles are indicated as responsible for the diuretic effects of the plants studied, with emphasis on phenolic compounds as flavonoids, phenolic acids, and xanthones. These results should encourage more detailed preclinical, clinical, and phytochemical investigations on Brazilian plants in the future.
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Affiliation(s)
- Priscila de Souza
- Programa de Pós-graduação em Ciências Farmacêuticas (PPGCF), Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, Brazil
| | - Luísa Nathália Bolda Mariano
- Programa de Pós-graduação em Ciências Farmacêuticas (PPGCF), Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, Brazil
- Laboratório de Biologia Cardiovascular, Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis, Brazil
| | - Camile Cecconi Cechinel-Zanchett
- Programa de Pós-graduação em Ciências Farmacêuticas (PPGCF), Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, Brazil
| | - Valdir Cechinel-Filho
- Programa de Pós-graduação em Ciências Farmacêuticas (PPGCF), Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, Brazil
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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: 21] [Impact Index Per Article: 5.3] [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.
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Cechinel-Zanchett CC, da Silva RDCMVDAF, Tenfen A, Siebert DA, Micke G, Vitali L, Cechinel-Filho V, Faloni de Andrade S, de Souza P. Bauhinia forficata link, a Brazilian medicinal plant traditionally used to treat cardiovascular disorders, exerts endothelium-dependent and independent vasorelaxation in thoracic aorta of normotensive and hypertensive rats. JOURNAL OF ETHNOPHARMACOLOGY 2019; 243:112118. [PMID: 31351191 DOI: 10.1016/j.jep.2019.112118] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 07/23/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Bauhinia forficata Link, commonly known as "cow's paw", is a native plant from South America. Its leaves are widely used in Brazilian folk medicine to treat diabetes and cardiovascular disorders. Although this species' biological potential has been extensively proven as an antidiabetic, anti-inflammatory and antioxidant agent, there is a lack of studies to evidence its action on the cardiovascular system. AIM OF THE STUDY This study was designed to investigate the vascular effects of B. forficata leaves preparations and its majority compound kaempferitrin, as well as its aglycone form kaempferol, in rat aortic rings of normotensive (NTR) and hypertensive (SHR) rats. MATERIALS AND METHODS Aorta rings from NTR and SHR precontracted with phenylephrine were exposed to cumulative concentrations of B. forficata extract, fractions (1-50 μg/mL) and compounds (0.001-0.3 μg/mL). The mechanisms involved in the vasorelaxant effect of ethyl-acetate plus butanol fraction (EAButF) were also evaluated. RESULTS Although kaempferitrin is the most abundant compound found in both methanolic extract and EAButF, 24 minor phenolic compounds were identified in B. forficata leaves, including kaempferol. EAButF was the only with endothelium-dependent and independent vasorelaxant properties in both NTR and SHR. The incubation with L-NAME or ODQ completely blocked EAButF-induced vasorelaxation. On the other hand, the incubation with propranolol, atropine, indomethacin, glibenclamide or barium chloride did not change the vasorelaxant activity of EAButF (50 μg/mL). Nevertheless, the incubation with tetraethylammonium and 4-aminopyridine significantly influenced the EAButF activity. It was also shown that Ca2+ influx or efflux is not related to EAButF vasorelaxation potential. Kaempferitrin and kaempferol were also able to relax the rat aortic rings in 34.70% and 40.54%, respectively. CONCLUSIONS This study shows, for the first time, the vasorelaxant effect of EAButF from B. forficata leaves, an effect that may be attributed to the modulation of vascular tone through nitric oxide/soluble guanylate cyclase pathway, and potassium channels. The bioactive kaempferitrin and kaempferol seem to be important for the effects observed with the fraction. Finally, preparations obtained from the leaves of B. forficata may be interesting candidates for new or complementary strategies regarding cardiovascular diseases.
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Affiliation(s)
- Camile Cecconi Cechinel-Zanchett
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí - UNIVALI, Itajaí, Santa Catarina, Brazil
| | | | - Adrielli Tenfen
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí - UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Diogo Alexandre Siebert
- Programa de Pós-graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianópolis-SC, Brazil
| | - Gustavo Micke
- Programa de Pós-graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianópolis-SC, Brazil
| | - Luciano Vitali
- Programa de Pós-graduação em Química, Universidade Federal de Santa Catarina (UFSC), Florianópolis-SC, Brazil
| | - Valdir Cechinel-Filho
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí - UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Sérgio Faloni de Andrade
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí - UNIVALI, Itajaí, Santa Catarina, Brazil
| | - Priscila de Souza
- Programa de Pós-graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí - UNIVALI, Itajaí, Santa Catarina, Brazil.
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Calfío C, Huidobro-Toro JP. Potent Vasodilator and Cellular Antioxidant Activity of Endemic Patagonian Calafate Berries ( Berberis microphylla) with Nutraceutical Potential. Molecules 2019; 24:E2700. [PMID: 31349544 PMCID: PMC6695892 DOI: 10.3390/molecules24152700] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 11/16/2022] Open
Abstract
Hydroalcoholic extracts of Patagonian Calafate berry (Berberis microphylla) contain mono or disaccharide conjugated anthocyanins and flavonols. The Liquid Chromatography-Mass Spectrometry (LC-MS) chemical extract profile identified glycosylated anthocyanidins such as delphinidin-, petunidin- and malvidin-3-glucoside as the major constituents. The predominant flavonols were 3-O substituents quercetin-rutinoside or -rhamnoside. Anthocyanins doubled flavonols in mass (13.1 vs. 6 mg/g extract). Polyphenols vascular actions were examined in the rat arterial mesenteric bed bioassay; extract perfusion elicited concentration-dependent vasodilatation mimicked by conjugated anthocyanins standards. Vascular responses of main glycosylated anthocyanins were endothelium-dependent (p < 0.001) and mediated by NO production (p < 0.05). The anthocyanins antioxidant activity determined in isolated endothelial cells (CAA) showed a reduced redox potential as compared to the extract or quercetin. While in the 2,2-Diphenyl-1-picrylhydrazyl (DPPH) assay, the anthocyanins showed an equivalent quercetin potency, the extract was 15-fold less active, proposing that the anthocyanin-induced vasodilation is not due to an antioxidant mechanism. The extract shows promising commercial nutraceutical potential.
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Affiliation(s)
- Camila Calfío
- Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile.
| | - Juan Pablo Huidobro-Toro
- Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile
- Centro para el Desarrollo de Nanociencia y Nanotecnología (CEDENNA), Universidad de Santiago de Chile, Santiago 9170022, Chile
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Aekthammarat D, Pannangpetch P, Tangsucharit P. Moringa oleifera leaf extract lowers high blood pressure by alleviating vascular dysfunction and decreasing oxidative stress in L-NAME hypertensive rats. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2019; 54:9-16. [PMID: 30668387 DOI: 10.1016/j.phymed.2018.10.023] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 10/16/2018] [Accepted: 10/18/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Enhancing relaxation of resistance arteries and decreasing oxidative stress by using natural products are potential strategies for prevention and treatment of hypertension. PURPOSE This study investigated whether aqueous extract of Moringa oleifera leaves (MOE) could alleviate Nω-nitro-L-arginine-methyl ester (L-NAME)-induced high blood pressure via modulation of vascular function and antioxidant properties. METHODS An experimental hypertensive model was established by administration of L-NAME (50 mg/kg/day) in drinking water to male Wistar rats for 3 weeks. Arterial pressure was measured indirectly by tail-cuff plethysmography and directly via femoral artery catheterization. Vasoreactivity of isolated rat mesenteric arterial bed was determined by the changes in perfusion pressure detected by a pressure transducer. Vascular superoxide anion (O2•-) production was determined by lucigenin-enhanced chemiluminescence. Other biochemical measurements including malondialdehyde (MDA) level, superoxide dismutase (SOD), and catalase (CAT) activities were measured by colorimetric assay. RESULTS L-NAME-treated rats developed significantly increased blood pressure and heart rate. Concurrent oral treatment with MOE (30 and 60 mg/kg/day) could decrease the high blood pressure and tachycardia in a dose-dependent manner. MOE reduced the impairment of acetylcholine-induced relaxation and decreased the hyperreactivity of adrenergic-mediated contraction in response to periarterial nerve stimulation and phenylephrine in isolated mesenteric arterial beds. In addition, MOE exhibited antioxidant effects in the hypertensive rats, as indicated by suppression of vascular O2•- production, decrease of plasma and thoracic aorta MDA levels, and increase of antioxidant activities of SOD and CAT. Moreover, MOE (0.001-0.3 mg) produced a dose-dependent relaxation in methoxamine pre-contracted arterial beds isolated from L-NAME hypertensive rats, which was abolished by endothelium denudation. CONCLUSION These findings suggest that the antihypertensive effect of MOE in L-NAME-hypertensive rats may be mediated by alleviating vascular dysfunction and oxidative stress and promoting endothelium-dependent vasorelaxation. MOE may be potentially useful as a natural product against hypertension.
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Affiliation(s)
- Direk Aekthammarat
- Department of Pharmacology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cardiovascular Research Group, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Patchareewan Pannangpetch
- Department of Pharmacology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cardiovascular Research Group, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Panot Tangsucharit
- Department of Pharmacology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand; Cardiovascular Research Group, Khon Kaen University, Khon Kaen 40002, Thailand.
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Ye P, Zhu Y, Gu Y, Zhang D, Chen S. Functional protection against cardiac diseases depends on ATP-sensitive potassium channels. J Cell Mol Med 2018; 22:5801-5806. [PMID: 30596400 PMCID: PMC6237599 DOI: 10.1111/jcmm.13893] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 08/12/2018] [Indexed: 12/20/2022] Open
Abstract
ATP-sensitive potassium channels (KATP) channels are widely distributed in various tissues, including pancreatic beta cells, muscle tissue and brain tissue. KATP channels play an important role in cardioprotection in physiological/pathological situations. KATP channels are inhibited by an increase in the intracellular ATP concentration and are stimulated by an increase in the intracellular MgADP concentration. Activation of KATP channels decreases ischaemia/reperfusion injury, protects cardiomyocytes from heart failure, and reduces the occurrence of arrhythmias. KATP channels are involved in various signalling pathways, and their participation in protective processes is regulated by endogenous signalling molecules, such as nitric oxide and hydrogen sulphide. KATP channels may act as a new drug target to fight against cardiovascular disease in the development of related drugs in the future. This review highlights the potential mechanisms correlated with the protective role of KATP channels and their therapeutic value in cardiovascular diseases.
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Affiliation(s)
- Peng Ye
- Department of CardiologyNanjing First HospitalNanjing Medical UniversityJiangsuChina
| | - Yan‐Rong Zhu
- Department of CardiologyNanjing First HospitalNanjing Medical UniversityJiangsuChina
| | - Yue Gu
- Department of CardiologyNanjing First HospitalNanjing Medical UniversityJiangsuChina
| | - Dai‐Min Zhang
- Department of CardiologyNanjing First HospitalNanjing Medical UniversityJiangsuChina
| | - Shao‐Liang Chen
- Department of CardiologyNanjing First HospitalNanjing Medical UniversityJiangsuChina
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