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Bakr AA, Ali M, Ibrahim K. Garlic and allopurinol alleviate the apoptotic pathway in rats' brain following exposure to fipronil insecticide. Environ Anal Health Toxicol 2022; 37:e2022037-0. [PMID: 36916050 PMCID: PMC10014746 DOI: 10.5620/eaht.2022037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 11/03/2022] [Indexed: 11/24/2022] Open
Abstract
Fipronil can cause oxidative tissue damage and apoptosis. Our goal is to evaluate the antiapoptotic impact of garlic or allopurinol against fipronil neurotoxicity. Thirty-six mature male albino rats were separated into control, garlic aqueous extract (500 mg/kg), allopurinol (150 mg/L in their drinking water), fipronil (13.277 mg/kg), garlic+fipronil, and allopurinol+fipronil. Our results revealed that fipronil induced a significant increase in brain malondialdehyde, protein carbonyl levels as well as enzymatic antioxidant activities (superoxide dismutase, catalase, glutathione peroxidase, and xanthine oxidase), but glutathione-S-transferase recorded a significant decrease as compared to the control. In addition, fipronil significantly up-regulated the brain pro-apoptotic (Bax) and caspase -3 mRNA gene expression and induced DNA fragmentation but caused down-regulation in anti-apoptotic (Bcl-2) mRNA genes expression. Interestingly, co-administration with garlic or allopurinol improved the lipid peroxidation, antioxidant disturbance, and apoptosis induced by fipronil in the brain tissues. In conclusion, garlic or allopurinol reduced fipronil-induced apoptosis and reduced oxidative tissue damage, most likely through enhancing the tissue antioxidant defense system.
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Affiliation(s)
- Amira Abo Bakr
- Biochemistry Division, Faculty of Science, Cairo University, Egypt
| | - Mohamed Ali
- Biochemistry Division, Faculty of Science, Cairo University, Egypt
| | - Khairy Ibrahim
- Mammalian Toxicology Department, Central Agricultural Pesticides Laboratory, Agricultural Research Center, Dokki, Giza, 12618, Egypt
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Fukushima AR, Navas-Suárez PE, Peña Muñoz JW, Ricci EL, Leoni LAB, Caperuto ÉC, Yanase L, Santana J, de França E, Delorenzi JCMOB, Terrivel AF, Ferreira GM, Hirata MH, Pantaleon LDP, Zacarelli-Magalhães J, de Abreu GR, Waziry PAF, Nicoletti MA, Spinosa HDS. Post-Partum Depression Lactating Rat Model for Evaluating Ketamine's Safety as a Pharmacotherapeutic Treatment: Roles in Cardiac and Urinary Function. J Cardiovasc Dev Dis 2022; 9:299. [PMID: 36135444 PMCID: PMC9504653 DOI: 10.3390/jcdd9090299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/08/2022] [Accepted: 08/10/2022] [Indexed: 11/22/2022] Open
Abstract
Depression is one of the world's most common and mentally disabling illnesses. Post-partum depression is a subtype of depression that affects one in seven women worldwide. Successful pharmacological treatment must consider the consequences for both, since the mother-child bond is fundamental for the well-being of both mother and infant as well as the general development of the newborn. Changes in maternal physiology and/or behavior can significantly influence the development of breastfed infants. Ketamine has been extensively studied for use as an antidepressant due to its mixed mechanisms of action. Safety and efficacy studies in the cardiovascular and urinary systems of a lactating postpartum depression animal model are essential for contributing toward ketamine's clinical use in the respective patient population. Thus, this project aimed to study the implications of postpartum maternal exposure to ketamine during lactation on the cardiovascular system of female rats submitted to the depression induction model by maternal separation. This model promotes depressive effects through stress caused by the interruption of mother-infant bond early in the offspring's life. To achieve depression, each dam was separated from her offspring for 3 h per day, from post-natal day 2 (PND2) to PND12. Experimental groups received daily treatment with either 5, 10, or 20 mg/kg of ketamine intraperitoneally during the lactation period, from PND2 to PND21. Behavioral tests consisted of the maternal and aggressive maternal behavior tests, the olfactory preference test, and the forced swim test. A technique for the detection of catecholamines and indoleamines in the heart muscle was developed for the experimental model groups. The histopathological evaluation was performed on these animals' cardiac muscles and urinary bladders. Our findings suggest that ketamine is safe for use in postpartum depression and does not induce cardiovascular and/or urinary systems toxicity.
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Affiliation(s)
- André Rinaldi Fukushima
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
- Faculdade de Ciências da Saúde IGESP (FASIG), São Paulo 01301-000, SP, Brazil
| | - Pedro Enrique Navas-Suárez
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
| | | | - Esther Lopes Ricci
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
- Faculdade de Ciências da Saúde IGESP (FASIG), São Paulo 01301-000, SP, Brazil
- Centro de Ciências Biológicas e da Saúde Universidade Presbiteriana Mackenzie, São Paulo 01302-907, SP, Brazil
| | | | - Érico C. Caperuto
- Grupo de Estudos e Pesquisa Aplicada em Metabolismo do Exercício, São Paulo 86039-100, SP, Brazil
| | - Leandro Yanase
- Grupo de Estudos e Pesquisa Aplicada em Metabolismo do Exercício, São Paulo 86039-100, SP, Brazil
| | - Jeferson Santana
- Grupo de Estudos e Pesquisa Aplicada em Metabolismo do Exercício, São Paulo 86039-100, SP, Brazil
| | - Elias de França
- Grupo de Estudos e Pesquisa Aplicada em Metabolismo do Exercício, São Paulo 86039-100, SP, Brazil
| | | | | | - Gláucio M. Ferreira
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, São Paulo 05508-000, SP, Brazil
| | - Mario Hiroyuki Hirata
- Department of Clinical and Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, São Paulo 05508-000, SP, Brazil
| | - Lorena de Paula Pantaleon
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
| | - Julia Zacarelli-Magalhães
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
| | - Gabriel Ramos de Abreu
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
| | | | | | - Helenice de Souza Spinosa
- Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo 05508-270, SP, Brazil
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Kushwah AS, Mittal R, Kumar M, Kaur G, Goel P, Sharma RK, Kabra A, Nainwal LM. Cardioprotective Activity of Cassia fistula L. Bark Extract in Isoproterenol-Induced Myocardial Infarction Rat Model. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2022; 2022:6874281. [PMID: 36051494 PMCID: PMC9427257 DOI: 10.1155/2022/6874281] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 08/05/2022] [Indexed: 11/24/2022]
Abstract
Cassia fistula Linn, generally recognized as Indian laburnum, is one of the ancient trees in the Indian subcontinent used for its ornamental and diverse medicinal properties. It is known for its ethnic medicinal uses in inflammatory and infectious pathologies such as antihelmintic, purgative, carminative, antipyretic, expectorant, analgesic, laxative, antiseptic, and antidote against snake poison. The Cassia bark is rich in anthraquinones, flavanols glycosides, and sitosterols, which renders it cardioprotective properties. The existing experiments were designed to assess the potential of Cassia fistula bark against isoproterenol (ISP)-induced cardiotoxicity in rats, which has not been validated yet. The bark was successively extracted with five different solvents, and each extract was subjected to in vitro antioxidant studies. Further acute oral toxicity assays were carried out preceding in vivo myocardial studies. Cardiotoxicity-inducing agent, ISP, was administrated to the rats for two consecutive days (8th and 9th). Based on in vitro studies, the Cassia fistula methanolic extract (CFME) was administered in two doses: CFME-LD (lower dose 250 mg/kg) and CFME-HD (high dose 500 mg/kg) separately. It was found that CFME produced a substantial decrease in lipid peroxidation and an increase in antioxidants in myocardial tissues. CFME abrogated the levels of triglyceride and total cholesterol with a decrease in alanine transaminase (ALT) and aspartate transaminase (AST) activity in serum at both doses. 2,3,5-Triphenyltetrazolium chloride (TTC) staining and histopathology also revealed the protective effects of CFME against ISP-induced myocardial infarction. The study showed the significant role of the CFME as a strong antioxidant and cardioprotective action in ISP-induced toxicity.
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Affiliation(s)
- Ajay Singh Kushwah
- Department of Pharmacology, Amar Shaheed Baba Ajit Singh Jujhar Singh Memorial College of Pharmacy, Bela, Rupnagar, Punjab 140111, India
| | - Roopal Mittal
- RKSD College of Pharmacy, Kaithal, Haryana 136027, India
| | - Manish Kumar
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab 140401, India
- Department of Neurosurgery, College of Medicine, Penn State Health Milton S. Hershey Medical Center, The Pennsylvania State University, State College, PA 17033-0850, USA
| | - Gurpreet Kaur
- Department of Pharmacology, Amar Shaheed Baba Ajit Singh Jujhar Singh Memorial College of Pharmacy, Bela, Rupnagar, Punjab 140111, India
| | - Prerna Goel
- School of Medical and Allied Sciences, GD Goenka University, Sohna, Gurugram, Haryana 122102, India
| | - Rahul Kumar Sharma
- Department of Pharmacology, Amar Shaheed Baba Ajit Singh Jujhar Singh Memorial College of Pharmacy, Bela, Rupnagar, Punjab 140111, India
| | - Atul Kabra
- University Institute of Pharma Sciences, Chandigarh University, Gharuan, Mohali, Punjab 140413, India
| | - Lalit Mohan Nainwal
- School of Medical and Allied Sciences, GD Goenka University, Sohna, Gurugram, Haryana 122102, India
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Alves-Silva JM, Zuzarte M, Girão H, Salgueiro L. Natural Products in Cardiovascular Diseases: The Potential of Plants from the Allioideae Subfamily (Ex-Alliaceae Family) and Their Sulphur-Containing Compounds. PLANTS (BASEL, SWITZERLAND) 2022; 11:1920. [PMID: 35893624 PMCID: PMC9332240 DOI: 10.3390/plants11151920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 07/17/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
Cardiovascular diseases (CVDs) are the leading cause of mortality worldwide and, together with associated risk factors such as diabetes, hypertension, and dyslipidaemia, greatly impact patients' quality of life and health care systems. This burden can be alleviated by fomenting lifestyle modifications and/or resorting to pharmacological approaches. However, due to several side effects, current therapies show low patient compliance, thus compromising their efficacy and enforcing the need to develop more amenable preventive/therapeutic strategies. In this scenario, medicinal and aromatic plants are a potential source of new effective agents. Specifically, plants from the Allioideae subfamily (formerly Alliaceae family), particularly those from the genus Allium and Tulbaghia, have been extensively used in traditional medicine for the management of several CVDs and associated risk factors, mainly due to the presence of sulphur-containing compounds. Bearing in mind this potential, the present review aims to gather information on traditional uses ascribed to these genera and provide an updated compilation of in vitro and in vivo studies validating these claims as well as clinical trials carried out in the context of CVDs. Furthermore, the effect of isolated sulphur-containing compounds is presented, and whenever possible, the relation between composition and activity and the mechanisms underlying the beneficial effects are pointed out.
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Affiliation(s)
- Jorge M. Alves-Silva
- Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.A.-S.); (M.Z.); (H.G.)
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra, University of Coimbra, 3000-075 Coimbra, Portugal
| | - Mónica Zuzarte
- Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.A.-S.); (M.Z.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra, University of Coimbra, 3000-075 Coimbra, Portugal
| | - Henrique Girão
- Coimbra Institute for Clinical and Biomedical Research, University of Coimbra, 3000-548 Coimbra, Portugal; (J.M.A.-S.); (M.Z.); (H.G.)
- Center for Innovative Biomedicine and Biotechnology, University of Coimbra, 3000-548 Coimbra, Portugal
- Clinical Academic Centre of Coimbra, University of Coimbra, 3000-075 Coimbra, Portugal
| | - Lígia Salgueiro
- Faculty of Pharmacy, University of Coimbra, 3000-548 Coimbra, Portugal
- Chemical Process Engineering and Forest Products Research Centre, University of Coimbra, 3030-290 Coimbra, Portugal
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Farag NE, El-Kherbetawy MK, Ismail HM, Abdelrady AM, Toraih EA, Abdelbasset WK, Lashine RM, EL-dosoky M, Abed SY, Ibraheem KM, Fawzy MS, Zaitone SA. Differential Effect of Three Macrolide Antibiotics on Cardiac Pathology and Electrophysiology in a Myocardial Infarction Rat Model: Influence on Sodium Nav1.5 Channel Expression. Pharmaceuticals (Basel) 2021; 14:ph14070597. [PMID: 34206182 PMCID: PMC8308720 DOI: 10.3390/ph14070597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 06/04/2021] [Accepted: 06/07/2021] [Indexed: 12/19/2022] Open
Abstract
Macrolides were reported to have cardiotoxic effects presented mainly by electrocardiogram (ECG) changes with increased risk in cardiac patients. We aimed to determine the impact of three macrolides, azithromycin, clarithromycin and erythromycin, on cardiac electrophysiology, cardiac enzyme activities, histopathological changes, and sodium voltage-gated alpha subunit 5 (Nav1.5) channel expression. We used eight experimental groups of male albino rats: vehicle, azithromycin (100 mg/kg), clarithromycin (100 mg/kg), erythromycin (100 mg/kg), MI + vehicle, MI + azithromycin (100 mg/kg), MI + clarithromycin (100 mg/kg) and MI + erythromycin (100 mg/kg); each group received chronic oral doses of the vehicle/drugs for seven weeks. ECG abnormalities and elevated serum cardiac enzymes were observed particularly in rats with AMI compared to healthy rats. Microscopic examination revealed elevated pathology scores for rats treated with clarithromycin in both experiments following treatment with erythromycin in healthy rats. Although rats with MI did not show further elevations in fibrosis score on treatment with macrolides, they produced significant fibrosis in healthy rats. Downregulation of cardiac Nav1.5 transcript was observed following macrolides treatment in both groups (healthy rats and rats with MI). In conclusion, the current findings suggested the potential cardiotoxic effects of chronic doses of macrolide antibiotics in rats with MI as manifested by abnormal ECG changes and pathological findings in addition to downregulation of Nav1.5 channels. Furthermore, in the current dose ranges, azithromycin produced the least toxicity compared to clarithromycin and erythromycin.
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Affiliation(s)
- Noha E. Farag
- Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt;
- Department of Physiology, College of Medicine, Taif University, Taif 21974, Saudi Arabia
| | | | - Hussein M. Ismail
- Department of Cardiology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt;
| | | | - Eman A. Toraih
- Department of Surgery, School of Medicine, Tulane University, New Orleans, LA 70112, USA;
- Genetics Unit, Histology and Cell Biology Department, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Walid Kamal Abdelbasset
- Department of Health and Rehabilitation Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdulaziz University, Alkharj 16278, Saudi Arabia;
- Department of Physical Therapy, Kasr Al-Aini Hospital, Cairo University, Giza 12613, Egypt
| | - Rehab M. Lashine
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt;
| | - Mohammed EL-dosoky
- Department of Neuroscience Technology, College of Applied Medical Science in Jubail, Imam Abdulrahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Sally Yussef Abed
- Department of Respiratory Care, College of Applied Medical Science in Jubail, Imam Abdulrahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Khalid M. Ibraheem
- Department of Anesthesia Technology, College of Applied Medical Sciences in Jubail, Imam Abdulrahman Bin Faisal University, Jubail 35816, Saudi Arabia;
| | - Manal S. Fawzy
- Department of Medical Biochemistry and Molecular Biology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
- Department of Biochemistry, Faculty of Medicine, Northern Border University, Arar 1321, Saudi Arabia
- Correspondence: (M.S.F.); or (S.A.Z.); Tel.: +20-1008584720 (M.S.F.); +20-1068916396 (S.A.Z.)
| | - Sawsan A. Zaitone
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, University of Tabuk, Tabuk 714, Saudi Arabia
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Suez Canal University, Ismailia 41522, Egypt
- Correspondence: (M.S.F.); or (S.A.Z.); Tel.: +20-1008584720 (M.S.F.); +20-1068916396 (S.A.Z.)
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Mohammed SA, Paramesha B, Meghwani H, Kumar Reddy MP, Arava SK, Banerjee SK. Allyl Methyl Sulfide Preserved Pressure Overload-Induced Heart Failure Via Modulation of Mitochondrial Function. Biomed Pharmacother 2021; 138:111316. [PMID: 33684689 DOI: 10.1016/j.biopha.2021.111316] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 01/15/2021] [Accepted: 01/21/2021] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Cardiovascular diseases are the leading cause of death globally, and they are causing enormous socio-economic burden to the developed and developing countries. Allyl Methyl Sulfide (AMS) is a novel cardioprotective metabolite identified in the serum of rats after raw garlic administration. The present study explored the cardioprotective effect of AMS on thoracic aortic constriction (TAC)-induced cardiac hypertrophy and heart failure model in rats. METHODS Thoracic aortic constriction (TAC) by titanium ligating clips resulted in the development of pressure overload-induced cardiac hypertrophy and heart failure model. Four weeks prior to TAC and for 8 weeks after TAC, Sprague Dawley (SD) rats were administered with AMS (25 and 50 mg/kg/day) or Enalapril (10 mg/kg/day). RESULTS We have observed AMS (25 and 50 mg/kg/day) intervention significantly improved structural and functional parameters of the heart. mRNA expression of fetal genes i.e., atrial natriuretic peptide (ANP), alpha skeletal actin (α-SA) and beta myosin heavy chain (β-MHC) were reduced in AMS treated TAC hearts along with decrease in perivascular and interstitial fibrosis. AMS attenuated lipid peroxidation and improved protein expression of endogenous antioxidant enzymes i.e., catalase and manganese superoxide dismutase (MnSOD) along with electron transport chain (ETC) complex activity. AMS increased mitochondrial fusion proteins i.e., mitofusin 1 (MFN1), mitofusin 2 (MFN2) and optic atrophy protein (OPA1), and reduced fission protein i.e., dynamin-related protein 1 (DRP1). Preliminary study suggests that AMS intervention upregulated genes involved in mitochondrial bioenergetics in normal rats. Further, in-vitro studies suggest that AMS reduced mitochondrial reactive oxygen species (ROS), preserved mitochondrial membrane potential and oxygen consumption rate (OCR) in isoproterenol-treated cardiomyoblast. CONCLUSION This study demonstrated that AMS protected cardiac remodelling, LV dysfunction and fibrosis in pressure overload-induced cardiac hypertrophy and heart failure model by improving endogenous antioxidants and mitochondrial function.
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Affiliation(s)
- Soheb Anwar Mohammed
- Non-Communicable Diseases Group, Translational Health Science and Technology Institute (THSTI), Faridabad, 121001, India.
| | - Bugga Paramesha
- Non-Communicable Diseases Group, Translational Health Science and Technology Institute (THSTI), Faridabad, 121001, India.
| | | | - Maramreddy Prasanna Kumar Reddy
- Cardio-Respiratory Division, Defence Institute of Physiology and Allied Sciences (DIPAS), Defense Research and Development Organization (DRDO), Timarpur, Delhi, India.
| | - Sudheer Kumar Arava
- Department of Pathology, All India Institute of Medical Sciences, New Delhi, 110029, India.
| | - Sanjay Kumar Banerjee
- Non-Communicable Diseases Group, Translational Health Science and Technology Institute (THSTI), Faridabad, 121001, India; Department of Biotechnology, National Institute of Pharmaceutical Education and Research (NIPER), Guwahati, 781101, India.
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7
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Çömez MS, Cellat M, Özkan H, Borazan Y, Aydın T, Gökçek İ, Türk E, Güvenç M, Çakır A, Özsoy ŞY. Protective effect of oleuropein on ketamine-induced cardiotoxicity in rats. Naunyn Schmiedebergs Arch Pharmacol 2020; 393:1691-1699. [PMID: 32383030 DOI: 10.1007/s00210-020-01870-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 04/08/2020] [Indexed: 01/01/2023]
Abstract
The antioxidant and cardioprotective effects of oleuropein have been reported in several studies; however, its effect on ketamine cardiotoxicity has not been known yet. The aim of this study was to investigate the effects of oleuropein in ketamine-induced cardiotoxicity model in rats. A total of 28 male Wistar Albino rats were included in the study and they were randomly divided into four groups, each having seven rats. Group 1 (control): rats were given 1 mL of DMSO by oral gavage method for 7 days. Group 2 (ketamine): on the seventh day of the study, 60 mg/kg ketamine was administered intraperitoneally. Then, 60 mg/kg ketamine was administered intraperitoneally every 10 min for 3 h. Group 3 (oleuropein): rats were given 200 mg/kg/day oleuropein by oral gavage method for 7 days. Group 4 (oleuropein + ketamine): rats were given 1 × 200 mg/kg oleuropein by oral gavage method for 7 days. Furthermore, 60 mg/kg ketamine was administered intraperitoneally on the seventh day of the experiment. Then, 60 mg/kg ketamine was administered intraperitoneally every 10 min for 3 h. Serum cardiac marker (TnI, CK-MB and CK) levels were measured. Histopathological analysis was performed on a portion of the cardiac tissue. Cardiac tissue oxidative stress and antioxidant markers (MDA, GSH, GSH.Px and CAT), TNF-α, IL-6, NF-κB, COX-2 and Nrf-2 gene expressions, and protein conversion levels of related genes were determined. Data obtained showed that ketamine administration increased MDA (p < 0.001), TNF-α (p < 0.01), IL-6 (p < 0.01), COX-2 (p < 0.001) and NF-κB (p < 0.001) levels, as well as serum TnI (p < 0.001), CK-MB (p < 0.001) and CK (p < 0.01) levels whereas decreased GSH (p < 0.05) and Nrf-2 (p < 0.05) levels, as well as GSH-Px (p < 0.001) and CAT (p < 0.05) enzyme activities. Oleuropein administration was observed to decrease MDA, TNF-α, IL-6, COX-2, NF-κB, TnI, CK-MB and CK levels close to the control group and to increase GSH levels and GSH-Px and CAT enzyme activities close to the control group. This study showed that oleuropein administration reversed the increased oxidative stress and inflammation as a result of the use of ketamine and had protective effects on the heart.
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Affiliation(s)
- Mehmet Selim Çömez
- Department of Anesthesiology and Reanimation, Faculty of Medicine, Hatay Mustafa Kemal University, 31300, Hatay, Turkey.
| | - Mustafa Cellat
- Department of Physiology, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Hüseyin Özkan
- Department of Genetics, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Yakup Borazan
- Adıyaman University, Education And Research Hospital, Adıyaman, Turkey
| | - Tuba Aydın
- Department of Pharmacognosy, Faculty of Pharmacy, Ağrı İbrahim Çeçen University, Agrı, Turkey
| | - İshak Gökçek
- Department of Physiology, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Erdinç Türk
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Mehmet Güvenç
- Department of Physiology, Faculty of Veterinary Medicine, Hatay Mustafa Kemal University, Hatay, Turkey
| | - Ahmet Çakır
- Department of Chemistry, Faculty of Science and Letters, Kilis 7 Aralık University, Kilis, Turkey
| | - Şule Yurdagül Özsoy
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
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8
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Mohammad HMF, Makary S, Atef H, El-Sherbiny M, Atteia HH, Ibrahim GA, Mohamed AS, Zaitone SA. Clopidogrel or prasugrel reduces mortality and lessens cardiovascular damage from acute myocardial infarction in hypercholesterolemic male rats. Life Sci 2020; 247:117429. [PMID: 32061670 DOI: 10.1016/j.lfs.2020.117429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 10/25/2022]
Abstract
AIMS Hypercholesterolemia is a hazard for increasing susceptibility of the heart to myocardial infarction (MI) by inducing platelet hyperaggregability. Clopidogrel and prasugrel have documented cardioprotective effects in clinical studies. Herein, we investigated whether clopidogrel and prasugrel could protect against isoproterenol-induced acute MI (A-MI) under hypercholesterolemic conditions in rats. MAIN METHODS Dietary hypercholesterolemic rats were subjected to acute doses of isoproterenol. Serum lipids, inflammatory markers, aortic endothelin1 and endothelial nitric oxide synthase (eNOS) mRNAs expression and immunexpression of BCL2 were determined. KEY FINDINGS Hypercholesterolemic rats showed infiltration of inflammatory cells and reduction in aortic wall thickness, deposition of fibrous tissue between cardiac muscle fibers. Protective doses of prasugrel or clopidogrel for 28 days before A-MI increased survival, amended the ECG parameters -including ST segment elevation- and improved the histopathological picture in hypercholesterolemic rats. This was coupled with reductions in platelet aggregation, creatine kinase-MB activity, endothelin 1, systemic inflammation and cardiac lipid peroxidation and increment in aortic eNOS expression. Clopidogrel and prasugrel groups showed enhanced BCL2 expression in cardiac fibers and aortic wall. SIGNIFICANCE Prasugrel and clopidogrel protected against A-MI via anti-aggregatory and anti-inflammatory effects. These results add to the value of these drugs in correcting cardiovascular dysfunction in patients vulnerable to A-MI after confirmation by appropriate human studies.
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Affiliation(s)
- Hala M F Mohammad
- Department of Clinical Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt; Central Lab., Center of Excellence in Molecular and Cellular Medicine (CEMCM), Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Samy Makary
- Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia 41522, Egypt
| | - Hoda Atef
- Department of Histology and Cell Biology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Mohamed El-Sherbiny
- Anatomy department, Faculty of Medicine, Mansoura University, Mansoura, Egypt; Anatomy department, College of Medicine, AlMaarefa University, Riyadh, Saudi Arabia
| | - Hebatallah H Atteia
- Department of Biochemistry, Faculty of Pharmacy, Zagazig University, Zagazig 44519, El-Sharkia, Egypt; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Tabuk, Tabuk, Saudi Arabia
| | - Gehan A Ibrahim
- Clinical Pathology Department, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Abdelaty Shawky Mohamed
- Pathology department, Faculty of Medicine, Mansoura University, Mansoura, Egypt; Pathology department, College of Medicine, AlMaarefa University, Riyadh, Saudi Arabia
| | - Sawsan A Zaitone
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, 41522 Ismailia, Egypt; Department of Pharmacology and Toxicology, Faculty of Pharmacy, University of Tabuk, Tabuk, Saudi Arabia.
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Musa balbisiana Fruit Rich in Polyphenols Attenuates Isoproterenol-Induced Cardiac Hypertrophy in Rats via Inhibition of Inflammation and Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:7147498. [PMID: 32082481 PMCID: PMC7007945 DOI: 10.1155/2020/7147498] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 12/26/2019] [Indexed: 12/24/2022]
Abstract
Musa balbisiana Colla (Family: Musaceae), commonly known as banana and native to India and other parts of Asia, is very rich in nutritional value and has strong antioxidant potential. In the present study, we have developed Musa balbisiana (MB) fruit pulp powder and evaluated its cardioprotective effect in cardiac hypertrophy, which is often associated with inflammation and oxidative stress. An ultra-high-pressure liquid chromatography-mass spectrometer (UPLC-MS/MS) has been used for the detection and systematic characterization of the phenolic compounds present in Musa balbisiana fruit pulp. The cardioprotective effect of MB was evaluated in a rat model of isoproterenol- (ISO-) induced cardiac hypertrophy by subcutaneous administration of isoproterenol (5 mg/kg−1/day−1), delivered through an alzet minipump for 14 days. Oral administration of MB fruit pulp powder (200 mg/kg/day) significantly (p < 0.001) decreased heart weight/tail length ratio and cardiac hypertrophy markers like ANP, BNP, β-MHC, and collagen-1 gene expression. MB also attenuated ISO-induced cardiac inflammation and oxidative stress. The in vivo data were further confirmed in vitro in H9c2 cells where the antihypertrophic and anti-inflammatory effect of the aqueous extract of MB was observed in the presence of ISO and lipopolysaccharide (LPS), respectively. This study strongly suggests that supplementation of dried Musa balbisiana fruit powder can be useful for the prevention of cardiac hypertrophy via the inhibition of inflammation and oxidative stress.
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Sayed AA, El-Desouky MA, Ibrahim KA. Garlic and allopurinol attenuate hepatic apoptosis induced by fipronil in male albino rats. Regul Toxicol Pharmacol 2019; 107:104400. [PMID: 31152858 DOI: 10.1016/j.yrtph.2019.05.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 05/26/2019] [Accepted: 05/28/2019] [Indexed: 02/07/2023]
Abstract
Fipronil (FPN) can induce oxidative tissue damage and may be contemplated as an apoptosis inducer. Our aim is to investigate the possible hepatoprotective roles of garlic or allopurinol (ALP) against fipronil subacute toxicity. Thirty-six mature male albino rats were randomly divided into six groups; the first group was saved as control (C), the 2nd (G) was orally intubated with 500 mg/kg aqueous garlic extract, and the 3rd (A) received 150 mg/L allopurinol in their drinking water. The 4th group (F) was administered 13.277 mg/kg fipronil by gavage, while the 5th (G + F) and 6th (A + F) groups received the same doses of garlic and allopurinol, respectively two hours before fipronil intoxication. Our results revealed that FPN significantly increased the hepatic malondialdehyde, protein carbonyl levels, and the enzymatic activities of superoxide dismutase, catalase, glutathione peroxidase, and xanthine oxidase, but it decreased glutathione-S-transferase compared to the control group. Moreover, FPN exhibited significant up-regulation in the hepatic pro-apoptotic (Bax) and caspase-3 genes expression, down-regulation in the anti-apoptotic (Bcl-2) mRNA gene expression and induced DNA fragmentation. Surprisingly, garlic or allopurinol co-treatment ameliorated the hepatic lipid peroxidation, antioxidants disruption, and apoptosis induced by FPN. In conclusion, garlic and allopurinol relieved the oxidative injury and reduced the fipronil-induced apoptosis probably by improving the tissue antioxidant defense system.
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Affiliation(s)
- Amira A Sayed
- Biochemistry Division, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | | | - Khairy A Ibrahim
- Mammalian Toxicology Department, Central Agricultural Pesticides Laboratory, Agricultural Research Center, Dokki, Giza, 12618, Egypt.
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Tawfik MK, Ameen AM. Cardioprotective effect of ranolazine in nondiabetic and diabetic male rats subjected to isoprenaline-induced acute myocardial infarction involves modulation of AMPK and inhibition of apoptosis. Can J Physiol Pharmacol 2019; 97:661-674. [DOI: 10.1139/cjpp-2018-0571] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Diabetes increases the sensitivity of myocardium to ischemic damage and impairs response of the myocardium to cardioprotective interventions. The present study aimed to elucidate the potential cardioprotective effect provided by ranolazine during myocardial infarction in nondiabetic and diabetic male rats. As AMP-activated protein kinase (AMPK) has been shown to be involved in the cellular response to ischemic injury, in this context, the present animal study evaluated the modulating role of ranolazine in the AMPK expression in isoprenaline-induced myocardial ischemic rat model. Male rats were divided into 2 experiments: experiment I and II (nondiabetic and diabetic rats) and assigned to normal control, saline control for isoprenaline, isoprenaline control, and ranolazine-treated groups. Ranolazine administration revealed effectiveness in attenuating the severity of isoprenaline-induced myocardial injury in both nondiabetic and diabetic rats as revealed by ECG signs, histopathological score, and apoptotic markers via abrogating the increments in the inflammatory and oxidative stress markers and modulating AMPK expression. Therefore, the current cardioprotective effect of ranolazine was, at least in part, mediated through inhibition of apoptosis and modulation of AMPK expression, encouraging considering the utility of ranolazine in protection from acute myocardial infarction.
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Affiliation(s)
- Mona K. Tawfik
- Department of Pharmacology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Angie M. Ameen
- Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
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12
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Dhyani N, Saidullah B, Fahim M, Omanwar S. Fenofibrate ameliorates neural, mechanical, chemical, and electrical alterations in the murine model of heart failure. Hum Exp Toxicol 2019; 38:1183-1194. [PMID: 31256679 DOI: 10.1177/0960327119860173] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Heart failure (HF) is a leading cause of hospitalization across the world and is known to cause ill-health and heavy economic losses. In the present study, a rat model of isoproterenol (ISO, 85 mg/kg subcutaneously for two subsequent days) induced HF was developed. ISO induces HF by its direct effect, that is, rise in left ventricular end-diastolic pressure (mechanical) and indirectly by altering the baroreflex (neural), electrocardiography (electrical), and development of oxidative stress and hyperlipidemia (chemical). Fenofibrate, a hypolipidemic drug, which ameliorates myocardial energy metabolism was seen to improve the both ISO-induced oxidative stress and lipid profile and consequently improved Baroreflex Sensitivity (BRS), partial ventricular functions, and cardiac hypertrophy. Therefore, our result suggests that fenofibrate treatment protected the heart by alleviating the ISO-induced effects, that is, neural, mechanical, electrical, and chemical alterations.
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Affiliation(s)
- N Dhyani
- 1 Department of Life Sciences, School of Sciences, Indira Gandhi National Open University (IGNOU), Maidan Garhi, New Delhi, India
| | - B Saidullah
- 1 Department of Life Sciences, School of Sciences, Indira Gandhi National Open University (IGNOU), Maidan Garhi, New Delhi, India
| | - M Fahim
- 2 Department of Physiology, Hamdard Institute of Medical Sciences and Research, Jamia Hamdard (Hamdard University), Hamdard Nagar, New Delhi, India
| | - S Omanwar
- 1 Department of Life Sciences, School of Sciences, Indira Gandhi National Open University (IGNOU), Maidan Garhi, New Delhi, India
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Eladwy RA, Mantawy EM, El-Bakly WM, Fares M, Ramadan LA, Azab SS. Mechanistic insights to the cardioprotective effect of blueberry nutraceutical extract in isoprenaline-induced cardiac hypertrophy. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2018; 51:84-93. [PMID: 30466632 DOI: 10.1016/j.phymed.2018.10.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Revised: 09/30/2018] [Accepted: 10/09/2018] [Indexed: 06/09/2023]
Abstract
BACKGROUND Lowbush blueberry extract (Vaccinium angustifolium) is abundant with polyphenols (such as chlorogenic acid) with high antioxidant profile. It has received great interest due to its protective role in many disorders such as heart diseases and neurological disorders. HYPOTHESIS We hypothesized that blueberry leaf extract might have a protective effect against cardiac hypertrophy via suppressing oxidative stress, inflammation and fibrosis. METHOD Blueberry leaf nutraceutical extract was administered orally to male albino rats at three different doses (25, 50 and 100 mg/kg/day of the extract, equivalent to 3.4, 6.8 and 13.6 mg of chlorogenic acid, respectively) once daily for 28 consecutive days against a dose of isoprenaline (ISO) (5 mg/kg) for 14 days. RESULTS The results indicated that isoprenaline induced significant myocardial damage, characterized by conduction abnormalities, increased heart-to-body weight ratio, increased serum CKMB, AST, c-TnI and LDH. Pretreatment with blueberry extract at a dose of 50 mg/kg/day (equivalent to 6.8 mg chlorogenic acid) protected against ISO-induced ECG changes, leakage of cardiac enzymes and histopathological changes. Also, ISO caused significant glutathione depletion, lipid peroxidation and reduction in activities of antioxidant catalase enzyme. These effects were prevented by pretreatment with blueberry extract. Additionally, ISO elicited inflammatory effects by increasing the expression of NF-κB, COX-2, TNF-α and IL-6 while pretreatment with blueberry extract significantly inhibited these inflammatory responses. Furthermore, ISO induced fibrosis by increasing the level of TGF-β while pretreatment with blueberry extract significantly reduced it. CONCLUSION These findings indicate that blueberry leaf extract possessed a potent protective effect against ISO-induced cardiac hypertrophy via suppressing oxidative stress, inflammation and fibrosis.
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Affiliation(s)
- Radwa A Eladwy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo 11829, Egypt
| | - Eman M Mantawy
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt
| | - Wesam M El-Bakly
- Department of Pharmacology and Therapeutics, Faculty of Medicine, Ain Shams University, Cairo 11566, Egypt
| | - Mohamed Fares
- School of Chemistry, University of Wollongong, Wollongong 2522, New South Wales, Australia
| | - Laila A Ramadan
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Egyptian Russian University, Badr City, Cairo 11829, Egypt
| | - Samar S Azab
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt.
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Katare PB, Bagul PK, Dinda AK, Banerjee SK. Toll-Like Receptor 4 Inhibition Improves Oxidative Stress and Mitochondrial Health in Isoproterenol-Induced Cardiac Hypertrophy in Rats. Front Immunol 2017; 8:719. [PMID: 28690610 PMCID: PMC5479928 DOI: 10.3389/fimmu.2017.00719] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 06/06/2017] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Inflammation remains a crucial factor for progression of cardiac diseases and cardiac hypertrophy remains an important cause of cardiac failure over all age groups. As a key regulator of inflammation, toll-like receptor 4 (TLR4) plays an important role in pathogenesis of cardiac diseases. Being an important regulator of innate immunity, the precise pathway of TLR4-mediated cardiac complications is yet to be established. Therefore, the primary objective of the present study was to find the role of TLR4 in cardiac hypertrophy and the molecular mechanism thereof. METHODS Cardiac hypertrophy was induced with administration of isoproterenol (5 mg/kg/day, sc). TLR4 receptor inhibitor RS-LPS (lipopolysaccharide from the photosynthetic bacterium Rhodobacter sphaeroides; 5 μg/day) and agonist lipopolysaccharide (LPS) (from Escherichia coli; 3.12 μg/day) were administered through osmotic pump along with isoproterenol. Cardiac hypertrophy as well as oxidative stress and mitochondrial parameters were evaluated. RESULTS Cardiac hypertrophy was confirmed with increased heart weight/body weight ratio as well as assessment of hypertrophic markers in heart. There was a marked increase in the TLR4 expression and oxidative stress along with mitochondrial dysfunction in ISO group. TLR4 inhibition significantly decreased heart weight/body weight ratio and ANP, collagen, and β-MHC expression and restored the disturbed cellular antioxidant flux. The mitochondrial perturbations that were observed in hypertrophy heart was normalized after administration of TLR4 inhibitor but not with the agonist. TLR4 agonism further exaggerated the oxidative stress in heart and hence accelerated the disease development and progression. CONCLUSION Our data show that increased TLR4 ligand pool in cardiac hypertrophy may exaggerate the disease progression. However, inhibition of TLR4 attenuated cardiac hypertrophy through reduced cardiac redox imbalance and mitochondrial dysfunction.
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Affiliation(s)
- Parmeshwar B Katare
- Drug Discovery Research Center (DDRC), Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Pankaj K Bagul
- Drug Discovery Research Center (DDRC), Translational Health Science and Technology Institute (THSTI), Faridabad, India
| | - Amit K Dinda
- Department of Pathology, All India Institute of Medical Sciences (AIIMS), New Delhi, India
| | - Sanjay K Banerjee
- Drug Discovery Research Center (DDRC), Translational Health Science and Technology Institute (THSTI), Faridabad, India
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Dietary fenugreek ( Trigonella foenum-graecum ) seeds and garlic ( Allium sativum ) alleviates oxidative stress in experimental myocardial infarction. FOOD SCIENCE AND HUMAN WELLNESS 2017. [DOI: 10.1016/j.fshw.2017.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bravi E, Marconi O, Sileoni V, Rollo MR, Perretti G. Antioxidant effects of supercritical fluid garlic extracts in canned artichokes. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2016; 53:3744-3751. [PMID: 28017989 PMCID: PMC5147697 DOI: 10.1007/s13197-016-2352-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/22/2016] [Accepted: 09/26/2016] [Indexed: 11/26/2022]
Abstract
The effects of adding supercritical carbon dioxide extracts of garlic (at two different concentrations of allicin) on select chemical indices in extra-virgin olive oil used to canned artichokes were studied. Tests were performed after processing and over a storage period of 1 year. A sensorial test was also conducted on the canned artichokes to establish the impact on flavor (in particular perceptions of rancidity and garlic flavor). Acidity, peroxide levels and p-anisidine values were measured as quality analytical parameters. Radical scavenging activity was also evaluated using the DPPH assay. The samples containing supercritical garlic extracts were compared with several other formulations, including control sample (prepared by mixing artichokes with powdered chili pepper and fresh garlic), artichokes with only garlic or only chili pepper, and artichokes treated with the synthetic antioxidant BHT. The results suggested that the allicin extract may be superior, or at least comparable, with BHT in preserving canned artichokes as demonstrated by its positive effects on oxidative stability and sensory profile.
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Affiliation(s)
- E. Bravi
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, n.c.n., 06126 Perugia, Italy
| | - O. Marconi
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, n.c.n., 06126 Perugia, Italy
| | - V. Sileoni
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, n.c.n., 06126 Perugia, Italy
| | - M. R. Rollo
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, n.c.n., 06126 Perugia, Italy
| | - G. Perretti
- Department of Agricultural, Food and Environmental Sciences, University of Perugia, Via S. Costanzo, n.c.n., 06126 Perugia, Italy
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Xu C, Tang F, Lu M, Yang J, Han R, Mei M, Hu J, Zhou M, Wang H. Astragaloside IV improves the isoproterenol-induced vascular dysfunction via attenuating eNOS uncoupling-mediated oxidative stress and inhibiting ROS-NF-κB pathways. Int Immunopharmacol 2016; 33:119-27. [PMID: 26903414 DOI: 10.1016/j.intimp.2016.02.009] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 12/24/2015] [Accepted: 02/08/2016] [Indexed: 12/30/2022]
Abstract
OBJECTIVE Oxidative stress and inflammation are regarded as two important triggers of endothelial dysfunction and play pivotal role in progression of vascular damage associated with cardiac hypertrophy. Our previous studies demonstrated that astragaloside IV (AsIV) could protect against cardiac hypertrophy in rats induced by isoproterenol (Iso), but its effects on the aorta are not known. In present study, we aimed to assess the effects of AsIV on Isoinduced vascular dysfunction. METHODS Sprague-Dawley (SD) rats were treated with Iso (10mg/kg/d) alone or in combination with AsIV (50mg/kg/d). RESULTS Compared with Isotreated alone, AsIV significantly reduced the ratios of heart weight/body weight and left ventricular weight/body weight. AsIV ameliorated the increased vasoconstriction response to phenylephrine induced by Iso and suppressed superoxide anion generation in rat aorta, increased endothelial nitric oxide synthase (eNOS) dimer/monomer ratio and its critical cofactor tetrahydrobiopterin (BH4) content in aorta as well as the NO production in the serum, reduced the plasmatic peroxynitrite (ONOO-). Moreover, in contrast with Isotreatment alone, AsIV decreased the ratio of nuclear-to-cytosolic protein expression of the NF-κB p65 subunit while enhanced its inhibited protein expression of IκB-α, down-regulated mRNA expression of IL-1β, IL-6 and TNF-α of the aorta. CONCLUSIONS The present study suggested that AsIV protects against Isoinduced vascular dysfunction probably via attenuating eNOS uncoupling-mediated oxidative stress and inhibiting ROS-NF-κB pathways.
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Affiliation(s)
- Chonghua Xu
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Futian Tang
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Meili Lu
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Jing Yang
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Ronghui Han
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Meng Mei
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Jin Hu
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Mingsheng Zhou
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China
| | - Hongxin Wang
- Key Laboratory of Cardiovascular and Cerebrovascular Drug Research of Liaoning Province, Liaoning Medical College, Jinzhou 121001, China.
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Khatua TN, Dinda AK, Putcha UK, Banerjee SK. Diallyl disulfide ameliorates isoproterenol induced cardiac hypertrophy activating mitochondrial biogenesis via eNOS-Nrf2-Tfam pathway in rats. Biochem Biophys Rep 2015; 5:77-88. [PMID: 28955809 PMCID: PMC5600345 DOI: 10.1016/j.bbrep.2015.11.008] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 10/27/2015] [Accepted: 11/09/2015] [Indexed: 11/29/2022] Open
Abstract
The beneficial effect of garlic on cardiovascular disease is well known. However, the use of raw garlic against cardiac hypertrophy is not established. In the present study we explored whether raw garlic and its compound, diallyl disulfide (DADS) could inhibit hypertrophy through H2S and/or mitochondrial biogenesis. Cardiac hypertrophy was induced in rat by giving isoproterenol at the dose of 5 mg/kg/day subcutaneously for 14 days through alzet minipump. Aqueous garlic homogenate, DADS and NaHS (liberate H2S) were fed to third, forth and fifth group of rats for 14 days at a dose of 250 mg/kg/day, 50 mg/kg/day, 14 µM/kg/day respectively. Garlic and DADS reduced cardiac hypertrophy markers and normalized mitochondrial ETC-complex activities, mitochondrial enzyme activites and mitochondrial biogenetic and apoptotic genes expression. Garlic and DADS enhanced eNOS and p-AKT level in rat heart along with increased NRF2 protein level and Tfam gene expression. However, normalization was not observed after administration of NaHS which generates H2S in-vivo. In conclusion, garlic and DADS induces mitochondrial biogenesis and ameliorates cardiac hypertrophy via activation of eNOS-Nrf2-Tfam pathway in rats.
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Affiliation(s)
- Tarak Nath Khatua
- Division of Medicinal Chemistry and Pharmacology, Indian Institute of Chemical Technology, Hyderabad 500607, India.,Drug Discovery Research Center, Translational Health Science and Technology Institute, Faridabad 121001, India
| | - Amit K Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Uday K Putcha
- Division of Pathology, National Institute of Nutrition, Hyderabad 500607, India
| | - Sanjay K Banerjee
- Division of Medicinal Chemistry and Pharmacology, Indian Institute of Chemical Technology, Hyderabad 500607, India.,Drug Discovery Research Center, Translational Health Science and Technology Institute, Faridabad 121001, India
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Khodeer DM, Zaitone SA, Farag NE, Moustafa YM. Cardioprotective effect of pioglitazone in diabetic and non-diabetic rats subjected to acute myocardial infarction involves suppression of AGE-RAGE axis and inhibition of apoptosis. Can J Physiol Pharmacol 2015; 94:463-76. [PMID: 27119311 DOI: 10.1139/cjpp-2015-0135] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Insulin resistance increases risk of cardiovascular diseases. This work investigated the protective effect of pioglitazone on myocardial infarction (MI) in non-diabetic and diabetic rats, focusing on its role on advanced glycated endproducts (AGEs) and cardiac apoptotic machinery. Male rats were divided into 2 experiments: experiment I and II (non-diabetic and diabetic rats) were assigned as saline, MI (isoproterenol, 85 mg/kg, daily), and MI+pioglitazone (5, 10, and 20 mg/kg). Injection of isoproterenol in diabetic rats produced greater ECG disturbances compared to non-diabetic rats. Treatment with pioglitazone (5 mg/kg) reduced the infarct size and improved some ECG findings. Pioglitazone (10 mg/kg) enhanced ECG findings, improved the histopathological picture and downregulated apoptosis in cardiac tissues. Whereas the higher dose of pioglitazone (20 mg/kg) did not improve most of the measured parameters but rather worsened some of them, such as proapoptotic markers. Importantly, a positive correlation was found between serum AGEs and cardiac AGE receptors (RAGEs) versus caspase 3 expression in the two experiments. Therefore, the current effect of pioglitazone was, at least in part, mediated through downregulation of AGE-RAGE axis and inhibition of apoptosis. Consequently, these data suggest that pioglitazone, at optimized doses, may have utility in protection from acute MI.
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Affiliation(s)
- Dina M Khodeer
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, 41522 Ismailia, Egypt
| | - Sawsan A Zaitone
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, 41522 Ismailia, Egypt
| | - Noha E Farag
- b Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Yasser M Moustafa
- a Department of Pharmacology and Toxicology, Faculty of Pharmacy, Suez Canal University, 41522 Ismailia, Egypt
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Ghule AE, Kulkarni CP, Bodhankar SL, Pandit VA. Effect of pretreatment with coenzyme Q10 on isoproterenol-induced cardiotoxicity and cardiac hypertrophy in rats. Curr Ther Res Clin Exp 2014; 70:460-71. [PMID: 24692838 DOI: 10.1016/j.curtheres.2009.12.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2009] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Coenzyme Q10 (CoQ10) is a lipid-soluble, vitamin-like substance found in the hydrophobic interior of the phospholipid bilayer of most cellular membranes. It appears to be involved in the coordinated regulation between oxidative stress and antioxidant capacity of heart tissue when the heart is subjected to oxidative stress in various pathogenic conditions. OBJECTIVE The objective of the present study was to investigate the effect of pretreatment with CoQ10 (100 mg/kg) on isoproterenol (ISO)-induced cardiotoxicity and cardiac hypertrophy in rats. METHODS Albino male Wistar rats (250-300 g) were evenly divided by lottery method into 1 of the following 3 groups: the ISO group (olive oil 2 mL/kg orally for 18 days and ISO 1 mg/kg IP from days 9-18); the CoQ10 + ISO group (CoQ10 100 mg/kg orally for 18 days and ISO 1 mg/kg IP from days 9-18); and the control group (olive oil 2 mL/kg orally for 18 days and water IP from days 9-18). Twenty-four hours after the last dose of water or ISO, the rats were anesthetized and an ECG was recorded. Blood was withdrawn by retro-orbital puncture for estimation of serum creatine kinase-MB (CK-MB) isoenzyme levels, lactate dehydrogenase (LDH) levels, and aspartate aminotransferase activities. The animals were euthanized using an overdose of ether. The hearts of 6 animals from each group were used for estimation of superoxide dismutase (SOD) activity, reduced glutathione (GSH) concentration, lipid peroxidation (LPO), malondialdehyde (MDA), and total protein concentration. Histopathology of the 2 remaining hearts in each group was carried out by a blinded technician. RESULTS A total of 24 rats (8 in each group) were used in this study; all rats survived to study end. Compared with the control group, the ISO-treated rats had a significant change in heart to body weight ratio (P < 0.001); significant changes in the endogenous antioxidants (ie, significantly higher myocardial MDA concentration [P < 0.001]; significantly lower myocardial GSH concentration [P < 0.001] and SOD activity [P < 0.01]); and significantly higher serum activities of marker enzymes (eg, CK-MB [P < 0.001] and LDH [P < 0.001]). Compared with the ISO group, the CoQ10 + ISO group had a significant change in heart to body weight ratio (P < 0.001); significant changes in the endogenous antioxidants (ie, significantly lower MDA concentration [P < 0.05]; significantly higher myocardial GSH concentration [P < 0.001] and SOD activity [P < 0.05]); and significantly lower serum activities of marker enzymes (eg, CK-MB [P < 0.05] and LDH [P < 0.01]). CONCLUSION Pretreatment with CoQ10 (100 mg/kg) for 18 days was associated with moderate protection against ISO-induced cardiotoxicity and cardiac hypertrophy, and with lower myocardial injury by preserving endogenous antioxidants and reducing LPO in rat heart.
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Affiliation(s)
- Arvindkumar E Ghule
- Department of Pharmacology, Poona College of Pharmacy, Bharati Vidyapeeth University, Pune, India
| | - Chetan P Kulkarni
- Department of Pharmacology, Poona College of Pharmacy, Bharati Vidyapeeth University, Pune, India
| | - Subhash L Bodhankar
- Department of Pharmacology, Poona College of Pharmacy, Bharati Vidyapeeth University, Pune, India
| | - Vijaya A Pandit
- Department of Pharmacology, Bharati Medical College, Bharati Vidyapeeth University, Pune, India
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Davel AP, Brum PC, Rossoni LV. Isoproterenol induces vascular oxidative stress and endothelial dysfunction via a Giα-coupled β2-adrenoceptor signaling pathway. PLoS One 2014; 9:e91877. [PMID: 24622771 PMCID: PMC3951496 DOI: 10.1371/journal.pone.0091877] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 02/17/2014] [Indexed: 01/18/2023] Open
Abstract
OBJECTIVE Sustained β-adrenergic stimulation is a hallmark of sympathetic hyperactivity in cardiovascular diseases. It is associated with oxidative stress and altered vasoconstrictor tone. This study investigated the β-adrenoceptor subtype and the signaling pathways implicated in the vascular effects of β-adrenoceptor overactivation. METHODS AND RESULTS Mice lacking the β1- or β2-adrenoceptor subtype (β1KO, β2KO) and wild-type (WT) were treated with isoproterenol (ISO, 15 μg.g(-1) x day(-1), 7 days). ISO significantly enhanced the maximal vasoconstrictor response (Emax) of the aorta to phenylephrine in WT (+34%) and β1KO mice (+35%) but not in β2KO mice. The nitric oxide synthase (NOS) inhibitor L-NAME abolished the differences in phenylephrine response between the groups, suggesting that ISO impaired basal NO availability in the aorta of WT and β1KO mice. Superoxide dismutase (SOD), pertussis toxin (PTx) or PD 98,059 (p-ERK 1/2 inhibitor) incubation reversed the hypercontractility of aortic rings from ISO-treated WT mice; aortic contraction of ISO-treated β2KO mice was not altered. Immunoblotting revealed increased aortic expression of Giα-3 protein (+50%) and phosphorylated ERK1/2 (+90%) and decreased eNOS dimer/monomer ratio in ISO-treated WT mice. ISO enhanced the fluorescence response to dihydroethidium (+100%) in aortas from WT mice, indicating oxidative stress that was normalized by SOD, PTx and L-NAME. The ISO effects were abolished in β2KO mice. CONCLUSIONS The β2-adrenoceptor/Giα signaling pathway is implicated in the enhanced vasoconstrictor response and eNOS uncoupling-mediated oxidative stress due to ISO treatment. Thus, long-term β2-AR activation might results in endothelial dysfunction.
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MESH Headings
- Animals
- Aorta/drug effects
- Aorta/metabolism
- Aorta/physiology
- Endothelium, Vascular/cytology
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/metabolism
- GTP-Binding Protein alpha Subunits, Gi-Go/metabolism
- Gene Expression Regulation/drug effects
- Gene Knockout Techniques
- Isoproterenol/pharmacology
- Male
- Mice
- Mitogen-Activated Protein Kinase 1/metabolism
- Mitogen-Activated Protein Kinase 3/metabolism
- Nitric Oxide/metabolism
- Nitric Oxide Synthase Type III/chemistry
- Oxidative Stress/drug effects
- Phenylephrine/pharmacology
- Phosphorylation/drug effects
- Protein Multimerization/drug effects
- Protein Structure, Quaternary
- Receptors, Adrenergic, beta-2/deficiency
- Receptors, Adrenergic, beta-2/genetics
- Receptors, Adrenergic, beta-2/metabolism
- Signal Transduction/drug effects
- Vasoconstriction/drug effects
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Affiliation(s)
- Ana P. Davel
- Department of Structural and Functional Biology, Institute of Biology, State University of Campinas-UNICAMP, Campinas, SP, Brazil
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Patricia C. Brum
- School of Physical Education and Sport, University of São Paulo, São Paulo, SP, Brazil
| | - Luciana V. Rossoni
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
- * E-mail:
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Moinuddin G, Inamdar MN, Kulkarni KS, Kulkarni C. Modulation of haemodynamics, endogeneous antioxidant enzymes, and pathophysiological changes by selective inhibition of angiotensin II type 1 receptors in pressureoverload rats. Cardiovasc J Afr 2014; 24:58-65. [PMID: 23736127 PMCID: PMC3721829 DOI: 10.5830/cvja-2012-080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Accepted: 11/28/2012] [Indexed: 11/17/2022] Open
Abstract
Background Constriction of the thoracic or abdominal aorta provides an experimental model of pressure-overload cardiac hypertrophy. Blockade of AT1 receptors is beneficial in preventing target-organ damage in hypertension. Objective To examine the effect of angiotensin II receptor antagonists on blood pressure, endogenous antioxidant enzyme and histopathological changes in pressure-overload rats. Methods Pressure overload was produced by abdominal aortic banding (AAB) using a blunt 22-guage needle in male rats as a model of cardiac hypertrophy. After surgery, the AAB-induced hypertension (AABIH) rats were treated with losartan 40 mg/kg/day, candesartan 10 mg/kg/day, irbesartan 10 mg/kg/day per os for 16 weeks. At 16 weeks of surgery, the rats were observed for general characteristics and mortality, and we determined non-invasive blood pressure (NIBP), endogenous antioxidant enzyme catalase and superoxide dismutase (SOD) activities, and histology of the target organs. Results In the AABIH group, significant increase in systolic blood pressure was observed from weeks 3 to 16 compared with the control group, along with reduced serum catalase and SOD activities. The treated groups showed significant reduction in systolic BP and increase in serum SOD and catalase activities. The histological changes induced in the target organs, namely heart, liver, kidneys and thoracic aorta in the AABIH rats were attenuated in the treated rats. Conclusion Blockade of the AT1 receptor caused an improvement in the myocardial antioxidant reserve and decreased oxidative stress in the hypertensive rats, which was evidenced by the protection observed in the treatment groups.
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Affiliation(s)
- Ghulam Moinuddin
- Department of Pharmacology, Al-Ameen College of Pharmacy, Bangalore, India.
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Gupta P, Kanwal A, Putcha UK, Bulani Y, Sojitra B, Khatua TN, Kuncha M, Banerjee SK. Cardioprotective effect of ritonavir, an antiviral drug, in isoproterenol induced myocardial necrosis: a new therapeutic implication. J Transl Med 2013; 11:80. [PMID: 23531330 PMCID: PMC3623744 DOI: 10.1186/1479-5876-11-80] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 03/22/2013] [Indexed: 12/24/2022] Open
Abstract
Background Ritonavir is a HIV protease inhibitor. In addition to its antiviral effect, Ritonavir directly inhibits the insulin-regulated glucose transporter GLUT4 and blocks glucose entry into fat and muscle cells. However, the effect of Ritonavir on cardiac GLUT4 inhibition during myocardial necrosis is not investigated. In the present study, we evaluated the role of Ritonavir in isoproterenol-induced myocardial necrosis in vivo and compared the effect with Phlorizin, a nonslective SGLTs inhibitor. Methods Isoproterenol (ISO) (150 mg/kg/day, i.p for 2 consecutive days) was administered to mice to cause myocardial necrosis. Phlorizin (400 mg/kg/day i.p twice daily for 2 days) and Ritonavir (10 mg/kg/day i.p twice daily for 2 days) were administered in two different groups of mice before isoproterenol administration. Results and discussion Isoproterenol (ISO) (150 mg/kg/day, i.p for 2 consecutive days) administration caused significant (p < 0.05) increase in heart/body weight ratio, and myocardial necrosis as evident by significant (p < 0.05) increase in serum markers i.e. SGOT and CK; and cardiac histopathological changes. Significant (p < 0.05) reduction in myocardial SOD and catalase activities, and GSH level along with a significant (p < 0.05) rise in myocardial TBARS and nitric oxide levels were observed after ISO administration. However, administration of phlorizin, a SGLT1 inhibitor has been found to exhibit partial protection in ISO induced myocardial necrosis, as observed by significant decrease in heart/body weight ratio and myocardial nitric oxide level; significant increase in myocardial SOD and catalase activities along with no histopathological alterations. On the other hand, administration of ritonavir, a nonspecific GLUT inhibitor has been found to exhibit complete protection as observed by normalisation of heart/body weight ratio, serum markers, antioxidant enzymes activities and histopathological alterations. In vitro study with heart homogenate confirmed no antioxidant effect of ritonavir and phlorizin in the absence and presence of isoproterenol. Conclusions Our study concluded that ritonavir, a nonspecific GLUT inhibitors showed complete protection in catecholamine induced myocardial necrosis.
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Affiliation(s)
- Prachi Gupta
- Division of Medicinal Chemistry and Pharmacology, Indian Institute of Chemical Technology (IICT), Hyderabad, India
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Khatua TN, Adela R, Banerjee SK. Garlic and cardioprotection: insights into the molecular mechanisms. Can J Physiol Pharmacol 2013; 91:448-58. [PMID: 23746107 DOI: 10.1139/cjpp-2012-0315] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Garlic is widely recognized for its immense therapeutic potential. Garlic has been shown to exert its beneficial effects against a wide spectrum of diseases, including cancer, diabetes, and microbial infections, as well as immunological and cardiovascular disorders. Most of the research on garlic has indicated that garlic and its active compounds are effective in reducing cardiovascular and metabolic risk by normalizing abnormal plasma lipids, oxidized low density lipoproteins, abnormal platelet aggregation, high blood pressure, and cardiac injury. Some of the beneficial effects of dietary garlic against cardiovascular disorders are mediated via the generation of hydrogen sulfide and nitric oxide in cardiomyocytes and endothelial cells. Garlic has the potential to protect the heart against myocardial infarction, doxorubicin-induced cardiotoxicity, arrhythmia, hypertrophy, and ischemia-reperfusion injury. The induction of cardiac endogenous antioxidants and the reduction of lipid peroxidation by garlic has been reported by several different groups. Other mechanisms, such as regulating ion channels, modulating Akt signaling pathways, histone deacetylase inhibition, and cytochrome P450 inhibition, could be responsible for the cardioprotective effect of garlic. Although several mechanisms have been identified for the cardioprotective effect of garlic, there is a need for further research to identify the specific molecular mechanism of cardioprotection in different cardiac diseases.
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Affiliation(s)
- Tarak Nath Khatua
- Division of Medicinal Chemistry and Pharmacology, Indian Institute of Chemical Technology (IICT), Hyderabad, India
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Khan RA, Khan MR, Sahreen S. Protective effects of rutin against potassium bromate induced nephrotoxicity in rats. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2012; 12:204. [PMID: 23116356 PMCID: PMC3552874 DOI: 10.1186/1472-6882-12-204] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 10/17/2012] [Indexed: 11/18/2022]
Abstract
BACKGROUND Rutin, a polyphenolic flavonoid, was investigated for its protective effects against the KBrO(3) induced renal injuries in rat. METHODS Group I was control (untreated), group II was given saline 0.5 ml/kg bw (0.9% NaCl), group III was administered KBrO(3) (20 mg/kg bw) intragastric twice a week for four weeks. Rutin was administered to group VI (50 mg/kg bw) and Group V (70 mg/kg bw) along with KBrO(3) (20 mg/kg bw) while group VI was given rutin (70 mg/kg bw) alone twice a week for four weeks. Protective effects of rutin on KBrO(3)-induced nephrotoxicity in rats were determined for biochemical parameter of urine, and serum, various antioxidant enzymes, DNA and histopathological damages in kidneys. RESULTS The level of urinary red blood cells, leucocytes count, specific gravity, urea, creatinine and urobilinogen was increased (P<0.01) whereas creatinine clearance was reduced. Serum level of protein, albumin, globulin, nitrite, creatinine and blood urea nitrogen (BUN) was significantly increased (P<0.01) by KBrO(3). Marked histopathological lesions, elevated DNA fragmentation and AgNORs count in renal tissues was determined. Activity of antioxidant enzymes; catalase, superoxide dismutase, glutathione peroxidase, glutathione-S-transferase, glutathione reductase, and reduced glutathione contents were decreased (P<0.01) while thiobarbituric acid reactive substances were increased (P<0.01) with KBrO(3) treatment in kidneys. DNA ladder assay was intimately related with the DNA fragmentation assay. Telomerase activity was found positive in the KBrO(3) treated kidneys. Treatment with rutin effectively ameliorated the alterations in the studied parameters of rat. Rutin administration alone to rats did not exhibit any significant change in any of the parameters studied. CONCLUSION These results suggest that rutin works as an antioxidant in vivo by scavenging reactive oxygen species and this serves to prevent oxidative renal damage in rat treated with KBrO(3).
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Affiliation(s)
- Rahmat Ali Khan
- Department of Biotechnology, Faculty of Biological Sciences, University of Science and Technology Bannu, Khyber Pakutunkhwa, Pakistan
| | - Muhamad Rashid Khan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan
| | - Sumaira Sahreen
- Botanical Sciences Division, Pakistan Museum of Natural History, Garden Avenue, Shakarparian, Islamabad, Pakistan
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Khatua TN, Padiya R, Karnewar S, Kuncha M, Agawane SB, Kotamraju S, Banerjee SK. Garlic provides protection to mice heart against isoproterenol-induced oxidative damage: role of nitric oxide. Nitric Oxide 2012; 27:9-17. [PMID: 22484451 DOI: 10.1016/j.niox.2012.03.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 03/02/2012] [Accepted: 03/21/2012] [Indexed: 11/16/2022]
Abstract
Garlic has been widely recognized as a cardioprotective agent. However, the molecular mechanism of its cardioprotective effects is not well established. Here we hypothesized that aqueous garlic homogenate may mediate cardioprotection via nitric oxide (NO). Mice were fed with saline and aqueous garlic homogenate (250 and 500 mgkg(-1)day(-1) orally) for 30 days. In another set of experiment, mice were pre-treated with saline, aqueous garlic homogenate (AGH) (250 mgkg(-1)day(-1) for 30 days), and AGH (30 days) along with L-NAME (20 mgkg(-1)day(-1) i.p. for last 7 days) before inducing acute myocardial infarction by isoproterenol (s.c. injection of isoproterenol 150 mgkg(-1)day(-1) for 2 days) and sacrificed after 48 h. Dose dependent increase in serum NO level was observed after garlic 250 and 500 mgkg(-1) dose feeding. While no change in serum SGPT and SGOT level, a significant decrease in serum LDH level was observed after garlic feeding. Garlic-induced NO formation was further confirmed in human aortic endothelial cells (HAEC). Administration of isoproterenol caused a significant decrease in endogenous antioxidants i.e., myocardial catalase, GSH and GPx activity, and mitochondrial enzyme activities like citrate synthase and β hydroxyacyl CoA dehydrogenase. All those deleterious cardiac changes induced by isoproterenol were significantly attenuated by garlic homogenate. However this beneficial effect of garlic was blunted when garlic was administered with L-NAME, a nonspecific inhibitor of nitric oxide synthase (NOS). Further, a significant increase in myocardial TBARS and decrease in total antioxidant activity was observed in L-NAME treated group compared to isoproterenol treated group. Administration of L-NAME in mice from control group lowered serum and cardiac NO levels without any change of oxidative stress parameters. In conclusion, our study provides novel evidence that garlic homogenate is protective in myocardial infarction via NO-signaling pathway in mice.
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Affiliation(s)
- Tarak Nath Khatua
- Division of Pharmacology and Chemical Biology, Indian Institute of Chemical Technology (IICT), Hyderabad 500607, India
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N-acetylcysteine offers cardioprotection by decreasing cardiac lipid hydroperoxides and 8-isoprostane level in isoproterenol-induced cardiotoxicity in rats. Cardiovasc Toxicol 2012; 11:373-81. [PMID: 21796404 DOI: 10.1007/s12012-011-9132-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
This study investigated the cardioprotective effect of N-acetylcysteine (NAC) on isoproterenol (ISO)-induced cardiotoxicity in rats. Male Sprague-Dawley rats were divided into control, NAC alone (100 mg/kg BW orally for 14 days), ISO-control (85 mg/kg BW), and ISO with NAC (for 14 days). Serum creatine kinase-MB and Lactate dehydrogenase were measured. From the heart homogenate lipid hydroperoxides (LPO), superoxide dismutase (SOD), total glutathione (GSH), and 8-isoprostane (IP) were measured. Histopathological examination of the heart was also carried out. There was a significant increase (P < 0.05) in LPO and IP levels in ISO-control group and NAC treatment reduced these changes. Antioxidant enzyme, SOD and GSH, level decreased significantly (P < 0.05) in ISO-control group, and treatment with NAC was able to reverse these changes significantly (P < 0.05). Histopathologically, ISO-control group showed morphological changes suggestive of cardiotoxicity with large areas of coagulative necrosis, with diffused interstitial edema. NAC treatment successfully reduced these histopathological changes. In conclusion, the study proves that NAC has a strong cardioprotective effect against isoproterenol-induced cardiac changes. NAC decreases isoproterenol-induced LPO and IP levels in the heart tissue and prevented free radicals-induced damage to the myocardium.
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Anti-inflammatory and anti-apoptotic effects of Crataegus oxyacantha on isoproterenol-induced myocardial damage. Mol Cell Biochem 2012; 367:1-8. [DOI: 10.1007/s11010-012-1251-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 01/25/2012] [Indexed: 10/14/2022]
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Haleagrahara N, Varkkey J, Chakravarthi S. Cardioprotective effects of glycyrrhizic acid against isoproterenol-induced myocardial ischemia in rats. Int J Mol Sci 2011; 12:7100-13. [PMID: 22072938 PMCID: PMC3211029 DOI: 10.3390/ijms12107100] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 08/15/2011] [Accepted: 08/23/2011] [Indexed: 12/02/2022] Open
Abstract
The aim of the present study was to look into the possible protective effects of glycyrrhizic acid (GA) against isoproterenol-induced acute myocardial infarction in Sprague-Dawley rats. The effect of three doses of glycyrrhizic acid in response to isoproterenol (ISO)-induced changes in 8-isoprostane, lipid hydroperoxides, super oxide dismutase and total glutathione were evaluated. Male Sprague-Dawley rats were divided into control, ISO-control, glycyrrhizic acid alone (in three doses-5, 10 and 20 mg/kg BW) and ISO with glycyrrhizic acid (in three doses) groups. ISO was administered at 85 mg/kg BW at two consecutive days and glycyrrhizic acid was administered intraperitoneally for 14 days. There was a significant increase in 8-isoprostane (IP) and lipid hydroperoxide (LPO) level in ISO-control group. A significant decrease in total superoxide dismutase (SOD) and total glutathione (GSH) was seen with ISO-induced acute myocardial infarction. Treatment with GA significantly increased SOD and GSH levels and decreased myocardial LPO and IP levels. Histopathologically, severe myocardial necrosis and nuclear pyknosis and hypertrophy were seen in ISO-control group, which was significantly reduced with GA treatment. Gycyrrhizic acid treatment proved to be effective against isoproterenol-induced acute myocardial infarction in rats and GA acts as a powerful antioxidant and reduces the myocardial lipid hydroperoxide and 8-isoprostane level.
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Affiliation(s)
- Nagaraja Haleagrahara
- Human Biology Division, School of Medicine, International Medical University, Kuala Lumpur 57000, Malaysia
| | - Julian Varkkey
- Division of Postgraduate Studies, International Medical University, Kuala Lumpur 57000, Malaysia; E-Mail:
| | - Srikumar Chakravarthi
- Pathology Division, School of Medicine, International Medical University, Kuala Lumpur 57000, Malaysia; E-Mail:
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Sanz-Rosa D. Los receptores β adrenérgicos en la enfermedad cardiovascular. HIPERTENSION Y RIESGO VASCULAR 2011. [DOI: 10.1016/j.hipert.2011.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Vennila L, Pugalendi KV. Protective effect of sesamol against myocardial infarction caused by isoproterenol in Wistar rats. Redox Rep 2010; 15:36-42. [PMID: 20196927 DOI: 10.1179/174329210x12650506623168] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
This study was designed to investigate the cardioprotective effect of sesamol on isoproterenol (ISO)-induced myocardial infarction in adult male albino Wistar rats. The heart damage induced by ISO was indicated by elevated levels of the marker enzymes such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), creatine kinase (CK), creatine kinase-MB (CK-MB) and the levels of troponin T and I in the plasma. In addition, lipid peroxidative markers such as thiobarbituric acid reactive substances (TBARS), conjugated dienes (CD) and lipid hydroperoxides (LHP) significantly increased in the plasma and heart. Activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione-S-transferase (GST) and glutathione reductase (GR) significantly decreased in the heart and (non-enzymic antioxidants) vitamin C, vitamin E and reduced glutathione (GSH)) levels significantly decreased in the plasma and heart in ISO-rats. Histopathological observations correlated with the biochemical parameters. Administration of sesamol at different doses 50, 100 and 200 mg/kg body weight intraperitoneally for 7 days prevented the above changes and improved towards normality; the 50 mg dose was more effective than the other two doses.
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Affiliation(s)
- Lakshmanan Vennila
- Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar 608 002, Tamilnadu, India
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Sood S, Narang D, Dinda AK, Maulik SK. Chronic oral administration of Ocimum sanctum Linn. augments cardiac endogenous antioxidants and prevents isoproterenol-induced myocardial necrosis in rats. J Pharm Pharmacol 2010; 57:127-33. [PMID: 15651118 DOI: 10.1211/0022357055146] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Wistar rats (200–250 g) of either sex were fed with fresh leaf homogenate of Ocimum sanctum by oral gavage in two different doses, 50 mg kg−1 (Os 50) and 100 mg kg−1 (Os 100), daily for 30 days. This was followed by isoproterenol administration (85 mg kg−1 s.c. two doses at 24 h intervals) in both control and O. sanctum-fed rats to induce myocardial necrosis. Hearts were isolated for estimation of endogenous myocardial antioxidants (superoxide dismutase (SOD), catalase, reduced glutathione (GSH) and glutathione peroxidase (GPx) and myocardial lipid peroxidation) and light microscopic study. Increased basal myocardial antioxidant SOD (9.3 ± 1.2 vs 3.7 ± 0.7 units mg−1 protein; P < 0.05) and catalase activities (34.3 ± 5.4 vs 17.9 ± 5.1 units mg−1 protein; P < 0.05) were observed in the Os 50 group only without any evidence of cellular injury in both the groups. In control rats, isoproterenol administration caused significant depletion of myocardial SOD (1.7 ± 0.2 units mg−1 protein) and GPx (104 ± 2 mU mg−1 protein) activities and increase in GSH (551.7 ± 30.9 μg g−1 wet weight of tissue) level, with evidence of myocardial necrosis. Isoproterenol-induced changes in myocardial SOD, GPx and GSH were prevented by both the doses of O. sanctum, however cellular injury was minimal only with 50 mg kg−1. The results indicate that long-term feeding of O. sanctum offered significant protection against isoproterenol-induced myocardial necrosis through a unique property of enhancement of endogenous antioxidants.
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Affiliation(s)
- S Sood
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi-110 029, India
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Narang D, Sood S, Thomas M, Dinda AK, Maulik SK. Dietary palm olein oil augments cardiac antioxidant enzymes and protects against isoproterenol-induced myocardial necrosis in rats. J Pharm Pharmacol 2010; 57:1445-51. [PMID: 16259777 DOI: 10.1211/jpp.57.11.0010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Wistar rats, 150–200g, of either sex, were fed daily with commercial rat diet supplemented with palm olein oil in two doses (5% v/w (n = 16) and 10% v/w (n = 16) of diet) for 30 days. Control rats (n = 16) were fed with normal diet. On the 29th and 30th days, 8 rats from each group were administred isoproterenol (85 mg/kg, s.c., 24-h interval). On the 31st day, all rats were sacrificed and myocardial tissues were studied for thiobarbituric acid reactive substances (TBARS), antioxidant enzymes and light microscopic changes, along with the ferric-reducing ability of plasma (FRAP). A significant rise in myocardial superoxide dismutase (SOD), catalase and glutathione peroxidase (GPx) activity and FRAP level were observed in rats fed with palm olein oil. Isoproterenol caused an increase in myocardial oxidative stress in control rats, as evidenced by an increase in myocardial TBARS level, reduction in FRAP and myocardial SOD, catalase and GPx activity, along with focal necrosis of cardiac muscle fibres on light microscopy. The rise in myocardial TBARS and depletion of SOD and catalase activity following isoproterenol administration were prevented in palm-olein-oil-supplemented diet-fed rats at both doses. Isoproterenol-induced myocardial light-microscopic changes were also prevented in the treated groups. The results suggest that dietary palm olein oil caused augmentation of myocardial antioxidant enzymes and protected against isoproterenol-induced myocardial necrosis and associated oxidative stress.
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Affiliation(s)
- D Narang
- Department of Pharmacology, All India Institute of Medical Sciences, New Delhi-110029, India
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Pedraza-Chaverri J, Yam-Canul P, Chirino YI, Sánchez-González DJ, Martínez-Martínez CM, Cruz C, Medina-Campos ON. Protective effects of garlic powder against potassium dichromate-induced oxidative stress and nephrotoxicity. Food Chem Toxicol 2007; 46:619-27. [PMID: 17950512 DOI: 10.1016/j.fct.2007.09.088] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Revised: 09/08/2007] [Accepted: 09/09/2007] [Indexed: 01/18/2023]
Abstract
Potassium dichromate (K(2)Cr(2)O(7))-induced nephrotoxicity is associated with oxidative stress. In the present work the effect of garlic powder, a recognized antioxidant, on K(2)Cr(2)O(7)-induced nephrotoxicity and oxidative stress was studied. Rats were fed a 2% garlic powder diet for 1 month. A single injection of K(2)Cr(2)O(7) (15 mg/kg) to rats induced tubule interstitial damage and an increase in the following markers of renal injury 2 days later: blood urea nitrogen (4.6-fold), serum creatinine (9.7-fold), proteinuria (35.9-fold), urinary excretion of N-acetyl-beta-d-glucosaminidase (12.9-fold) and glutathione-S-transferase (2.3-fold) and a decrease of 65% in serum glutathione peroxidase activity. In addition, K(2)Cr(2)O(7) injection increased the following nitrosative and oxidative stress markers in kidney: 3-nitrotyrosine (1.9-fold), 4-hydroxy-2-nonenal (2.1-fold), malondialdehyde (1.8-fold) and protein carbonyl content (1.7-fold). It was found that garlic powder feeding was able to prevent by 44-71% the alterations in the markers of renal injury studied, by 55% the histological damage, and by 47-100% the increase in markers of oxidative and nitrosative stress. It is concluded that the ability of garlic powder to ameliorate K(2)Cr(2)O(7)-induced renal injury is associated with its antioxidant properties. Our data support the use of garlic powder as a renoprotective agent.
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Affiliation(s)
- José Pedraza-Chaverri
- Facultad de Química, Departamento de Biología, Edificio F, Segundo Piso, Laboratorio 209, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 D.F., Mexico.
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Chuah SC, Moore PK, Zhu YZ. S-allylcysteine mediates cardioprotection in an acute myocardial infarction rat model via a hydrogen sulfide-mediated pathway. Am J Physiol Heart Circ Physiol 2007; 293:H2693-701. [PMID: 17766469 DOI: 10.1152/ajpheart.00853.2007] [Citation(s) in RCA: 109] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
S-allylcysteine (SAC) is an organosulfur-containing compound derived from garlic. Studies have shown that garlic is beneficial in the treatment of cardiovascular diseases. This study aims to elucidate if SAC is responsible for this cardioprotection using acute myocardial infarction (AMI) rat models. In addition, we hypothesized that SAC may mediate cardioprotection via a hydrogen sulfide (H(2)S)-related pathway. Rats were pretreated with saline, SAC (50 mg x kg(-1) x day(-1)), SAC + propagylglycine (PAG; 50 mg + 10 mg x kg(-1) x day(-1)) or PAG (10 mg x kg(-1) x day(-1)) for 7 days before AMI induction and killed 48 h after. Our results showed that SAC significantly lowered mortality (12.5% vs. 33.3%, P < 0.05) and reduced infarct size. SAC + PAG- and PAG-treated rats had larger infarct sizes than controls (60.9 +/- 0.01 and 62.0 +/- 0.03%, respectively, vs. 50.0 +/- 0.03%; P < 0.05). Pretreatment with SAC did not affect BP, but BP was significantly elevated in SAC + PAG and PAG-treated groups (P < 0.05). In addition, plasma H(2)S levels and left ventricular cystathionine-gamma-lyase (CSE) activities were analyzed to investigate the involvement of H(2)S. CSE is the enzyme responsible for H(2)S production in the heart. SAC increased left ventricular CSE activity in AMI rats (2.75 +/- 0.34 vs. 1.23 +/- 0.16 micromol x g protein(-1) x h(-1); P < 0.01). SAC + PAG-treated rats had significantly lower CSE activity compared with the SAC-treated group (1.22 +/- 0.27 vs. 2.75 +/- 0.34 micromol x g protein(-1) x h(-1); P < 0.05). Similarly, SAC-treated rats had higher plasma H(2)S concentration compared with controls and the SAC + PAG-treated group. Protein expression studies revealed that SAC upregulated CSE expression (1.1-fold of control; P < 0.05), whereas SAC + PAG and PAG downregulated its expression (0.88-fold of control in both groups; P < 0.005). In conclusion, our study provides novel evidence that SAC is protective in myocardial infarction via an H(2)S-related pathway.
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Affiliation(s)
- Shin Chet Chuah
- Cardiovascular Biology Research Group, Department of Pharmacology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, China
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Davel APC, Kawamoto EM, Scavone C, Vassallo DV, Rossoni LV. Changes in vascular reactivity following administration of isoproterenol for 1 week: a role for endothelial modulation. Br J Pharmacol 2006; 148:629-39. [PMID: 16702995 PMCID: PMC1751879 DOI: 10.1038/sj.bjp.0706749] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
1. The aim of this study was to assess the effects of treatment with isoproterenol (ISO, 0.3 mg kg-1 day-1, s.c.) for 7 days on the vascular reactivity of rat-isolated aortic rings. Additionally, potential mechanisms underlying the changes that involved the endothelial modulation of contractility were investigated. 2. Treatment with ISO induced cardiac hypertrophy without changes in haemodynamic parameters. Aortic rings from ISO-treated rats showed an increase in the contraction response to phenylephrine (PHE) and serotonin, but did not change relaxations produced by acetylcholine or isoproterenol. Removal of the endothelium increased the responses to PHE in both groups. However, this procedure was less effective in ISO-treated as compared with control rats. Endothelial cell removal abolished the increase in the response to PHE in ISO-treated rats. The presence of Nomega-nitro-L-arginine methyl ester shifted the concentration-response curve to PHE to the left in both groups of rats. However, this effect was more pronounced in the ISO group. In addition, aminoguanidine (50 microM) potentiated the actions of PHE only in the ISO group. ISO treatment increased nitric oxide synthase (NOS) activity and neuronal NOS and endothelial NOS protein expression in the aorta. 3. Neither losartan (10 microM) nor indomethacin (10 microM) abolished the effects of ISO on the actions of PHE. Superoxide dismutase (SOD, 150 U ml-1) and L-arginine (5 mM), but neither catalase (300 U ml-1) nor apocynin (100 microM), blocked the effect of ISO treatment. In addition, we observed an increase in superoxide anion levels as measured by ethidium bromide fluorescence and of copper and zinc superoxide dismutase protein expression in ISO-treated rats. 4. In conclusion, our data suggest that ISO treatment alters the endothelial cell-mediated modulation of the contraction to PHE in rat aorta. The increased maximal response of PHE seems to be due to an increase in superoxide anion generation, which inactivates some of the basal NO produced and counteracts NO-mediated negative modulation even in the presence of high NO production and antioxidant defence.
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Affiliation(s)
- Ana Paula C Davel
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, ICB, University of São Paulo, Av. Professor Lineu Prestes, 1524, sala 101B, 05508-900 São Paulo, SP, Brazil
- Department of Physiological Sciences, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - Elisa Mitiko Kawamoto
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Cristoforo Scavone
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, 05508-900 São Paulo, SP, Brazil
| | - Dalton V Vassallo
- Department of Physiological Sciences, Federal University of Espírito Santo, Vitória, ES, Brazil
| | - Luciana V Rossoni
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, ICB, University of São Paulo, Av. Professor Lineu Prestes, 1524, sala 101B, 05508-900 São Paulo, SP, Brazil
- Author for correspondence:
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