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Naryzhnaya NV, Mukhomedzyanov AV, Sirotina M, Maslov LN, Kurbatov BK, Gorbunov AS, Kilin M, Kan A, Krylatov AV, Podoksenov YK, Logvinov SV. δ-Opioid Receptor as a Molecular Target for Increasing Cardiac Resistance to Reperfusion in Drug Development. Biomedicines 2023; 11:1887. [PMID: 37509526 PMCID: PMC10377504 DOI: 10.3390/biomedicines11071887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/24/2023] [Accepted: 06/28/2023] [Indexed: 07/30/2023] Open
Abstract
An analysis of published data and the results of our own studies reveal that the activation of a peripheral δ2-opioid receptor (δ2-OR) increases the cardiac tolerance to reperfusion. It has been found that this δ2-OR is localized in cardiomyocytes. Endogenous opioids are not involved in the regulation of cardiac resistance to reperfusion. The infarct-limiting effect of the δ2-OR agonist deltorphin II depends on the activation of several protein kinases, including PKCδ, ERK1/2, PI3K, and PKG. Hypothetical end-effectors of the cardioprotective effect of deltorphin II are the sarcolemmal KATP channels and the MPT pore.
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Affiliation(s)
- Natalia V Naryzhnaya
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Alexander V Mukhomedzyanov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Maria Sirotina
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Leonid N Maslov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Boris K Kurbatov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Alexander S Gorbunov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Mikhail Kilin
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Artur Kan
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Andrey V Krylatov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Yuri K Podoksenov
- Cardiology Research Institute, Tomsk National Research Medical Center, Russian Academy of Science, Tomsk 634021, Russia
| | - Sergey V Logvinov
- Department of Histology, Embryology and Cytology, Siberian State Medical University, Tomsk 634050, Russia
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Wu Q, Yang H, Zheng Q, Chen Q, Li X, Guo J. κ-Opioid Receptors Improve Vascular Endothelial Dysfunction in Salt-Sensitive Hypertension via PI3K/Akt/eNOS Signaling Pathway. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:5352959. [PMID: 36865348 PMCID: PMC9974251 DOI: 10.1155/2023/5352959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/14/2022] [Accepted: 11/24/2022] [Indexed: 02/23/2023]
Abstract
κ-Opioid receptors (κ-OR) are widely used to regulate the activity of the cardiovascular system. To explore the effect and mechanism of κ-OR on salt-sensitive hypertensive endothelial dysfunction, we used Dah1 rats to construct a rat model of salt-sensitive hypertension on a high-salt (HS) diet. Then, the rats were treated with κ-OR activators U50,488H (1.25 mg/kg) and inhibitor nor-BNI (2.0 mg/kg) for 4 weeks, respectively. The rat aortas were collected to detect the contents of NO, ET-1, AngII, NOS, T-AOC, SO, and NT. Protein expression was determined for NOS, Akt, and Caveolin-1. In addition, the vascular endothelial cells were extracted, and the levels of NO, TNF-α, IL-1, IL-6, IL-8, IL-10, p-Akt, and p-eNOS in cell supernatants were detected. In vivo results showed that compared with the HS group, treated with U50,488H promoted rats' vasodilation by increasing the NO content and decreasing ET-1 and AngII contents. U50,488H reduced endothelial cell apoptosis and attenuated vascular, smooth muscle cell and endothelial cell injury. U50,488H also enhanced the rats' response to oxidative stress by increasing the NOS and T-AOC contents. Moreover, U50,488H increased the eNOS, p-eNOS, Akt, and p-AKT expression and decreased the iNOS and Caveolin-1 expression. In vitro results showed that U50,488H promoted NO, IL-10, p-Akt, and p-eNOS levels in endothelial cell supernatants versus the HS group. And U50,488H reduced the adhesion of peripheral blood mononuclear cells and polymorphonuclear neutrophils to endothelial cells and the migration function of polymorphonuclear neutrophils. Our study suggested that κ-OR activation may improve vascular endothelial dysfunction in salt-sensitive hypertensive rats through the PI3K/Akt/eNOS signaling pathway. This may be a potential therapeutic approach in the treatment of hypertension.
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Affiliation(s)
- Qi Wu
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
| | - Hong Yang
- Department of Cardiovascular Medicine, The Second Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
| | - Qin Zheng
- Department of Geriatrics, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
| | - Qiuhong Chen
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
| | - Xiaohui Li
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
| | - Jingyi Guo
- Department of Cardiovascular Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, 610000 Sichuan, China
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Dalefield ML, Scouller B, Bibi R, Kivell BM. The Kappa Opioid Receptor: A Promising Therapeutic Target for Multiple Pathologies. Front Pharmacol 2022; 13:837671. [PMID: 35795569 PMCID: PMC9251383 DOI: 10.3389/fphar.2022.837671] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 05/20/2022] [Indexed: 11/13/2022] Open
Abstract
Kappa-opioid receptors (KOR) are widely expressed throughout the central nervous system, where they modulate a range of physiological processes depending on their location, including stress, mood, reward, pain, inflammation, and remyelination. However, clinical use of KOR agonists is limited by adverse effects such as dysphoria, aversion, and sedation. Within the drug-development field KOR agonists have been extensively investigated for the treatment of many centrally mediated nociceptive disorders including pruritis and pain. KOR agonists are potential alternatives to mu-opioid receptor (MOR) agonists for the treatment of pain due to their anti-nociceptive effects, lack of abuse potential, and reduced respiratory depressive effects, however, dysphoric side-effects have limited their widespread clinical use. Other diseases for which KOR agonists hold promising therapeutic potential include pruritis, multiple sclerosis, Alzheimer's disease, inflammatory diseases, gastrointestinal diseases, cancer, and ischemia. This review highlights recent drug-development efforts targeting KOR, including the development of G-protein-biased ligands, mixed opioid agonists, and peripherally restricted ligands to reduce side-effects. We also highlight the current KOR agonists that are in preclinical development or undergoing clinical trials.
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Affiliation(s)
| | | | | | - Bronwyn M. Kivell
- Centre for Biodiscovery, School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
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Zhang S, Yang F, Shi R, Liu C, Zhao L, Gu X, Liu Y, Fu F, Feng N, Liu Y, Jia M, Fan R, Yang L, Li J, Li J, Pei J. Activation of κ-opioid receptor inhibits inflammatory response induced by sodium palmitate in human umbilical vein endothelial cells. Cytokine 2021; 146:155659. [PMID: 34332276 DOI: 10.1016/j.cyto.2021.155659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 07/11/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The current study aims to investigate the effect of κ-opioid receptor (κ-OR) activation on sodium palmitate (SP)-induced human umbilical vein endothelial cells (HUVECs) inflammatory response and elucidate the underlying mechanisms. METHODS A hyperlipidemic cell model was established and treated with κ-OR agonist (U50,488H), and antagonist (norbinaltorphimine, nor-BNI), or inhibitors targeting PI3K, Akt or eNOS (LY294002, MK2206-2HCl or L-NAME, respectively). Furthermore, the expression levels of NLRP3, caspase-1, p-Akt, Akt, p-eNOS, and total eNOS were evaluated. Additionally, the production of reactive oxygen species, and levels of inflammatory factors, such as TNF-α, IL-1β, IL-6, IL-1 and adhesion molecules, such as ICAM-1, VCAM-1, P-selectin, and E-selectin were determined. The adherence rates of the neutrophils and monocytes were assessed as well. RESULTS The SP-induced hyperlipidemic cell model demonstrated increased expression of NLRP3 and caspase-1 proteins (P < 0.05) and elevated ROS levels (P < 0.01), and decreased phosphorylated-Akt and phosphorylated-eNOS expression (P < 0.05). In addition, SP significantly increased TNF-α, IL-1β, IL-6, ICAM-1, VCAM-1, P-selectin, and E-selectin levels (P < 0.01), decreased IL-10 levels (P < 0.01), and increased the adhesion rates of monocytes and neutrophils (P < 0.01). The SP-induced inflammatory response in HUVECs was ameliorated by κ-OR agonist, U50,488H. However, the protective effect of U50,488H was abolished by κ-OR antagonist, nor-BNI, and inhibitors of PI3K, Akt and eNOS. CONCLUSION Our findings suggest that κ-OR activation inhibits SP-induced inflammation by activating the PI3K/Akt/eNOS signaling pathway.
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Affiliation(s)
- Shumiao Zhang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Fan Yang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Rui Shi
- School of Life Sciences, Northwest University, No.1 North Taibai Road, Xi'an 710069, Shaanxi Province, People's Republic of China
| | - Chaoyang Liu
- School of Life Sciences, Northwest University, No.1 North Taibai Road, Xi'an 710069, Shaanxi Province, People's Republic of China
| | - Lei Zhao
- Department of Neurosurgery, Tangdu Hospital, Air Force Medical University, Xi'an 710033, Shaanxi Province, China
| | - Xiaoming Gu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Yinji Liu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Feng Fu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Na Feng
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Yali Liu
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Min Jia
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Rong Fan
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Lu Yang
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Jun Li
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China
| | - Juan Li
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China.
| | - Jianming Pei
- Department of Physiology and Pathophysiology, National Key Discipline of Cell Biology, Air Force Medical University, No. 169 West Changle Road, Xi'an 710032, Shaanxi Province, People's Republic of China; School of Life Sciences, Northwest University, No.1 North Taibai Road, Xi'an 710069, Shaanxi Province, People's Republic of China.
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Abdulredha A, Abosaooda M, Al-Amran F, Hadi NR. Berberine Protests the Heart from Ischemic Reperfusion Injury via Interference with Oxidative and Inflammatory Pathways. Med Arch 2021; 75:174-179. [PMID: 34483445 PMCID: PMC8385727 DOI: 10.5455/medarh.2021.75.174-179] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/10/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Ischemia and reperfusion (I/R) is a pathological condition characterized by an initial restriction of blood supply to an organ followed by the subsequent restoration of perfusion and concomitant reoxygenation. OBJECTIVE The aim of the study is to assess the possible cardioprotective potential effect of berberine in myocardial ischemia reperfusion injury induced by ligation of coronary artery in a male rat model. METHODS Total amount of 28 adult male albino rats were randomized into 4 equal groups: 1) Sham group, rats underwent the same anesthetic and surgical procedure as the control group except for LAD ligation; 2), Active control group, rats subjected to regional ischemia for 30 min by ligation of LAD coronary artery and reperfusion for 2 hours, 3), Control vehicle group, rats received dimethyl sulphoxide (DMSO) (vehicle of berberine) via IP route and subjected to ischemia for 30 minutes before ligation of LAD coronary artery & reperfusion for 2 hr; 4), Berberine treated group, rats pretreated with berberine10 mg/kg via IP injection 30minutes before ligation of LAD coronary artery & then subjected to reperfusion for 2 hr. RESULTS In the control group, as compared with sham, tissue TNF-α, IL-6, IL-10, caspase-3 and BAX, plasma cTn-T and serum MDA significantly increased (P<0.05), while serum GSH significantly decreased (P<0.05). The histopathological control group showed a significant cardiac injury (P<0.05) compared with the sham group. Berberine significantly counteracted (P<0.05) the increase of TNF-α, IL-6, caspase-3 and BAX and counteracted the increase in plasma cTn-T and serum MDA. Berberine produces a significant elevation (P<0.05) in cardiac IL-10 and serum GSH with a significant reduction in (P<0.05) cardiac injury. CONCLUSION Berberine attenuates myocardial I/R injury in male rats via interfering with inflammatory reactions and apoptosis which were induced by I/R injury.
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Affiliation(s)
- Abeer Abdulredha
- Al-Sadar Teaching Medical City, Al-Najaf Open Heart and Interventional Cardiac Center. Najaf, Iraq
| | | | - Fadhil Al-Amran
- Department of Thoracic Surgery, College of Medicine, Kufa University, Kufa, Iraq
| | - Najah R. Hadi
- Al-Sadar Teaching Medical City, Al-Najaf Open Heart and Interventional Cardiac Center. Najaf, Iraq
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Xue Y, Fu W, Liu Y, Yu P, Sun M, Li X, Yu X, Sui D. Ginsenoside Rb2 alleviates myocardial ischemia/reperfusion injury in rats through SIRT1 activation. J Food Sci 2020; 85:4039-4049. [PMID: 33073372 DOI: 10.1111/1750-3841.15505] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 09/05/2020] [Accepted: 09/28/2020] [Indexed: 12/16/2022]
Abstract
The cardioprotective effects of ginsenoside Rb2 on oxidative stress, which is induced by hydrogen peroxide and myocardial ischemia/reperfusion (MI/R) injury, have been studied. The mechanisms were associated with the inhibition of cardiomyocyte apoptosis, a high concentration of antioxidant defense enzymes, and scavenging oxidative stress products. Because of the association with oxidative reaction and cardioprotection, sirtuin-1 (SIRT1) was selected as a promising target for investigating whether MI/R injury can be alleviated by ginsenoside Rb2 pretreatment through SIRT1 activation. The rats were exposed to ginsenoside Rb2 with or without SIRT1 inhibitor EX527 before ligation of coronary artery. Ginsenoside Rb2 reduced myocardial superoxide generation; downregulated gp91phox expression; and decreased the mRNA expression levels and activities of interleukin-1β, interleukin-6, and tumor necrosis factor-α. The results demonstrated that ginsenoside Rb2 significantly attenuated oxidative stress and inflammation induced by MI/R injury. In addition, ginsenoside Rb2 upregulated SIRT1 expression and downregulated Ac-p53 expression. However, EX527 blocked the protective effects, indicating that the pharmacological action of ginsenoside Rb2 involves SIRT1. Our results thus revealed that ginsenoside Rb2 alleviated MI/R injury in rats by inhibiting oxidative stress and inflammatory response through SIRT1 activation. PRACTICAL APPLICATION: Ginsenoside Rb2 has a protective effect on MI/R injury by activating SIRT1 expression, reducing myocardium inflammation, and alleviating oxidative stress. Thus, ginsenoside Rb2 is a promising novel agent for ameliorating MI/R injury in ischemic heart diseases and cardiac surgery.
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Affiliation(s)
- Yan Xue
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China.,Department of Burn Surgery, The First Hospital of Jilin University, Changchun, Jilin, 130021, PR China
| | - Wenwen Fu
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Yanzhe Liu
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Ping Yu
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Mingyang Sun
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Xin Li
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Xiaofeng Yu
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
| | - Dayun Sui
- Department of Pharmacology, School of Pharmaceutical Sciences, Jilin University, Changchun, Jilin, 130021, PR China
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Su H, Ma Z, Guo A, Wu H, Yang X. Salvianolic acid B protects against sepsis-induced liver injury via activation of SIRT1/PGC-1α signaling. Exp Ther Med 2020; 20:2675-2683. [PMID: 32765761 PMCID: PMC7401829 DOI: 10.3892/etm.2020.9020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Accepted: 08/01/2019] [Indexed: 12/15/2022] Open
Abstract
Liver injury occurs frequently during sepsis, which leads to high mortality and morbidity. A previous study has suggested that salvianolic acid B (SalB) is protective against sepsis-induced lung injury. However, whether SalB is able to protect against sepsis-induced liver injury remains unclear. The present study aimed to investigate the effects of SalB on sepsis-induced liver injury and its potential underlying mechanisms. Sepsis was induced in mice using a cecal ligation and puncture (CLP) method. The mice were treated with SalB (30 mg/kg intraperitoneally) at 0.5, 2 and 8 h after CLP induction. Pathological alterations of the liver were assessed using hematoxylin and eosin staining. The serum levels of alanine transaminase (ALT), aspartate aminotransferase (AST), tumor necrosis factor (TNF)-α and interleukin (IL)-6 were measured. The hepatic mRNA levels of TNF-α, IL-6, Bax and Bcl-2 were also detected. The results suggested that treatment with SalB ameliorated sepsis-induced liver injury in the mice, as supported by the mitigated pathologic changes and lowered serum aminotransferase levels. SalB also decreased the levels of the inflammatory cytokines TNF-α and IL-6 in the serum and the liver of the CLP model mice. In addition, SalB significantly downregulated Bax expression and upregulated Bcl-2 expression, and upregulated the expression levels of SIRT1 and PGC-1α. However, when sirtuin 1 (SIRT1) small interfering RNA was co-administered with SalB, the protective effects of SalB were attenuated and the expression levels of SIRT1 and PGC-1α were reduced. In summary, these results indicate that SalB mitigates sepsis-induced liver injury via reduction of the inflammatory response and hepatic apoptosis, and the underlying mechanism may be associated with the activation of SIRT1/PGC-1α signaling.
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Affiliation(s)
- Hongling Su
- Department of Gastroenterology, Xidian Group Hospital, Xi'an, Shaanxi 710000, P.R. China
| | - Zhisheng Ma
- Department of Gastroenterology, Xidian Group Hospital, Xi'an, Shaanxi 710000, P.R. China
| | - Aixia Guo
- Department of Gastroenterology, Xidian Group Hospital, Xi'an, Shaanxi 710000, P.R. China
| | - Hong Wu
- Department of General Surgery, Xidian Group Hospital, Xi'an, Shaanxi 710000, P.R. China.,Department of General Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Xiangmin Yang
- Department of Gastroenterology, Xidian Group Hospital, Xi'an, Shaanxi 710000, P.R. China
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Fu W, Xu H, Yu X, Lyu C, Tian Y, Guo M, Sun J, Sui D. 20(S)-Ginsenoside Rg2 attenuates myocardial ischemia/reperfusion injury by reducing oxidative stress and inflammation: role of SIRT1. RSC Adv 2018; 8:23947-23962. [PMID: 35540288 PMCID: PMC9081734 DOI: 10.1039/c8ra02316f] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/11/2018] [Indexed: 11/21/2022] Open
Abstract
Previously we demonstrated that 20(S)-ginsenoside Rg2 protects cardiomyocytes from H2O2-induced injury by inhibiting reactive oxygen species (ROS) production, increasing intracellular levels of antioxidants and attenuating apoptosis. We explored the protective effect of 20(S)-ginsenoside Rg2 on myocardial ischemia/reperfusion (MI/R) injury and to clarify its potential mechanism of action. Rats were exposed to 20(S)-ginsenoside Rg2 in the presence/absence of the silent information regulator SIRT(1) inhibitor EX527 and then subjected to MI/R. 20(S)-Ginsenoside Rg2 conferred a cardioprotective effect by improving post-ischemic cardiac function, decreasing infarct size, reducing the apoptotic index, diminishing expression of creatine kinase-MB, aspartate aminotransferase and lactate dehydrogenase in serum, upregulating expression of SIRT1, B-cell lymphoma-2, procaspase-3 and procaspase-9, and downregulating expression of Bax and acetyl (Ac)-p53. Pretreatment with 20(S)-ginsenoside Rg2 also resulted in reduced myocardial superoxide generation, gp91phox expression, malondialdehyde content, cardiac pro-inflammatory markers and increased myocardial activities of superoxide dismutase, catalase and glutathione peroxidase. These results suggested that MI/R-induced oxidative stress and inflammation were attenuated significantly by 20(S)-ginsenoside Rg2. However, these protective effects were blocked by EX527, indicating that SIRT1 signaling may be involved in the pharmacological action of 20(S)-ginsenoside Rg2. Our results demonstrated that 20(S)-ginsenoside Rg2 attenuates MI/R injury by reducing oxidative stress and inflammatory responses via SIRT1 signaling. 20(S)-Ginsenoside Rg2 confers a protective effect against MI/R injury via SIRT1 signaling, by alleviating oxidative stress and reducing myocardium inflammation.![]()
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Affiliation(s)
- Wenwen Fu
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Huali Xu
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Xiaofeng Yu
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Chen Lyu
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Yuan Tian
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Minyu Guo
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
| | - Jiao Sun
- School of Nursing
- Jilin University
- Changchun
- China
| | - Dayun Sui
- Department of Pharmacology
- School of Pharmaceutical Sciences
- Jilin University
- Changchun 130021
- China
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9
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Bisoprolol protects myocardium cells against ischemia/reperfusion injury by attenuating unfolded protein response in rats. Sci Rep 2017; 7:11859. [PMID: 28928480 PMCID: PMC5605660 DOI: 10.1038/s41598-017-12366-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 09/07/2017] [Indexed: 01/02/2023] Open
Abstract
Bisoprolol (B) exerts potential cardioprotective effects against myocardial ischemia/reperfusion (I/R) injury. Unfolded protein response (UPR) attenuates I/R injury induced apoptosis by reducing oxidative damage and inflammation response. The current study investigated whether the protective effects of bisoprolol resulted from modulating UPR and anti-inflammatory during myocardial I/R condition and elucidated its potential mechanisms. Sprague-Dawley rats were treated with B in the absence or presence of the injected UPR activator dithiothreitol (DTT) and then subjected to myocardial I/R surgery. In vitro, cultured H9C2 cells were pretreated with B or DTT and then subjected to simulate ischemia reperfusion (SIR) operation. Bisoprolol conferred cardioprotective effects by improving postischemic cardiac function, decreasing infarct size, reducing apoptotic index, diminishing serum creatine kinase and lactate dehydrogenase levels, suppressing TNF-α and IL-6 secretion, inhibiting UPR signal pathways and downregulating caspase-12 and caspase-3 expressions. Consistently, B conferred similar antioxidative and anti-inflammatory effects against SIR injury in cultured H9C2 cardiomyocytes. Pretreatment with DTT or C/EBP homologous protein (CHOP) overexpression mediated by lentivirus administration both abolished these effects. In summary, our results demonstrate that Bisoprolol protects myocardium cells against ischemia/reperfusion injury partly by attenuating unfolded protein response.
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10
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Soeberdt M, Molenveld P, Storcken RPM, Bouzanne des Mazery R, Sterk GJ, Autar R, Bolster MG, Wagner C, Aerts SNH, van Holst FR, Wegert A, Tangherlini G, Frehland B, Schepmann D, Metze D, Lotts T, Knie U, Lin KY, Huang TY, Lai CC, Ständer S, Wünsch B, Abels C. Design and Synthesis of Enantiomerically Pure Decahydroquinoxalines as Potent and Selective κ-Opioid Receptor Agonists with Anti-Inflammatory Activity in Vivo. J Med Chem 2017; 60:2526-2551. [PMID: 28218838 DOI: 10.1021/acs.jmedchem.6b01868] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In order to develop novel κ agonists restricted to the periphery, a diastereo- and enantioselective synthesis of (4aR,5S,8aS)-configured decahydroquinoxalines 5-8 was developed. Physicochemical and pharmacological properties were fine-tuned by structural modifications in the arylacetamide and amine part of the pharmacophore as well as in the amine part outside the pharmacophore. The decahydroquinoxalines 5-8 show single-digit nanomolar to subnanomolar κ-opioid receptor affinity, full κ agonistic activity in the [35S]GTPγS assay, and high selectivity over μ, δ, σ1, and σ2 receptors as well as the PCP binding site of the NMDA receptor. Several analogues were selective for the periphery. The anti-inflammatory activity of 5-8 after topical application was investigated in two mouse models of dermatitis. The methanesulfonamide 8a containing the (S)-configured hydroxypyrrolidine ring was identified as a potent (Ki = 0.63 nM) and highly selective κ agonist (EC50 = 1.8 nM) selective for the periphery with dose-dependent anti-inflammatory activity in acute and chronic skin inflammation.
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Affiliation(s)
- Michael Soeberdt
- Dr. August Wolff GmbH & Co. KG Arzneimittel , Sudbrackstraße 56, D-33611 Bielefeld, Germany
| | - Peter Molenveld
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | - Roy P M Storcken
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | | | - Geert Jan Sterk
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | - Reshma Autar
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | - Marjon G Bolster
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | - Clemens Wagner
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | | | | | - Anita Wegert
- Mercachem , Kerkenbos 1013, NL-6546 BB Nijmegen, The Netherlands
| | - Giovanni Tangherlini
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster , Correnstraße 48, D-48149 Münster, Germany.,Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), Universität Münster , D-48149 Münster, Germany
| | - Bastian Frehland
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster , Correnstraße 48, D-48149 Münster, Germany
| | - Dirk Schepmann
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster , Correnstraße 48, D-48149 Münster, Germany.,Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), Universität Münster , D-48149 Münster, Germany
| | - Dieter Metze
- Klinik für Hautkrankheiten, Universitätsklinikium Münster , Von-Esmarch-Straße 58, D-48149 Münster, Germany
| | - Tobias Lotts
- Klinik für Hautkrankheiten, Universitätsklinikium Münster , Von-Esmarch-Straße 58, D-48149 Münster, Germany.,Kompetenzzentrum chronischer Pruritus (KCP), Universitätsklinikium Münster , Von-Esmarch-Straße 58, D-48149 Münster, Germany
| | - Ulrich Knie
- Dr. August Wolff GmbH & Co. KG Arzneimittel , Sudbrackstraße 56, D-33611 Bielefeld, Germany
| | - Kun-Yuan Lin
- Eurofins Panlabs Taiwan, Ltd. , 158 Li-Teh Road, Peitou, Taipei 11259, Taiwan
| | - Tai-Yu Huang
- Eurofins Panlabs Taiwan, Ltd. , 158 Li-Teh Road, Peitou, Taipei 11259, Taiwan
| | - Chih-Ching Lai
- Eurofins Panlabs Taiwan, Ltd. , 158 Li-Teh Road, Peitou, Taipei 11259, Taiwan
| | - Sonja Ständer
- Klinik für Hautkrankheiten, Universitätsklinikium Münster , Von-Esmarch-Straße 58, D-48149 Münster, Germany.,Kompetenzzentrum chronischer Pruritus (KCP), Universitätsklinikium Münster , Von-Esmarch-Straße 58, D-48149 Münster, Germany
| | - Bernhard Wünsch
- Institut für Pharmazeutische und Medizinische Chemie der Universität Münster , Correnstraße 48, D-48149 Münster, Germany.,Cells-in-Motion Cluster of Excellence (EXC 1003-CiM), Universität Münster , D-48149 Münster, Germany
| | - Christoph Abels
- Dr. August Wolff GmbH & Co. KG Arzneimittel , Sudbrackstraße 56, D-33611 Bielefeld, Germany
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11
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An R, Zhao L, Xu J, Xi C, Li H, Shen G, Zhang W, Zhang S, Sun L. Resveratrol alleviates sepsis-induced myocardial injury in rats by suppressing neutrophil accumulation, the induction of TNF-α and myocardial apoptosis via activation of Sirt1. Mol Med Rep 2016; 14:5297-5303. [DOI: 10.3892/mmr.2016.5861] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 08/24/2016] [Indexed: 11/06/2022] Open
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Maslov LN, Khaliulin I, Oeltgen PR, Naryzhnaya NV, Pei J, Brown SA, Lishmanov YB, Downey JM. Prospects for Creation of Cardioprotective and Antiarrhythmic Drugs Based on Opioid Receptor Agonists. Med Res Rev 2016; 36:871-923. [PMID: 27197922 PMCID: PMC5082499 DOI: 10.1002/med.21395] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 03/31/2016] [Accepted: 04/04/2016] [Indexed: 12/19/2022]
Abstract
It has now been demonstrated that the μ, δ1 , δ2 , and κ1 opioid receptor (OR) agonists represent the most promising group of opioids for the creation of drugs enhancing cardiac tolerance to the detrimental effects of ischemia/reperfusion (I/R). Opioids are able to prevent necrosis and apoptosis of cardiomyocytes during I/R and improve cardiac contractility in the reperfusion period. The OR agonists exert an infarct-reducing effect with prophylactic administration and prevent reperfusion-induced cardiomyocyte death when ischemic injury of heart has already occurred; that is, opioids can mimic preconditioning and postconditioning phenomena. Furthermore, opioids are also effective in preventing ischemia-induced arrhythmias.
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Affiliation(s)
| | - Igor Khaliulin
- School of Clinical SciencesUniversity of BristolBristolUK
| | | | | | - Jian‐Ming Pei
- Department of PhysiologyFourth Military Medical UniversityXi'anP. R. China
| | | | - Yury B. Lishmanov
- Research Institute for CardiologyTomskRussia
- National Research Tomsk Polytechnic University634050TomskRussia
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Berberine Attenuates Myocardial Ischemia/Reperfusion Injury by Reducing Oxidative Stress and Inflammation Response: Role of Silent Information Regulator 1. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2015; 2016:1689602. [PMID: 26788242 PMCID: PMC4691633 DOI: 10.1155/2016/1689602] [Citation(s) in RCA: 83] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Accepted: 09/06/2015] [Indexed: 12/21/2022]
Abstract
Berberine (BBR) exerts potential protective effect against myocardial ischemia/reperfusion (MI/R) injury. Activation of silent information regulator 1 (SIRT1) signaling attenuates MI/R injury by reducing oxidative damage and inflammation response. This study investigated the antioxidative and anti-inflammatory effects of BBR treatment in MI/R condition and elucidated its potential mechanisms. Sprague-Dawley rats were treated with BBR in the absence or presence of the SIRT1 inhibitor sirtinol (Stnl) and then subjected to MI/R injury. BBR conferred cardioprotective effects by improving postischemic cardiac function, decreasing infarct size, reducing apoptotic index, diminishing serum creatine kinase and lactate dehydrogenase levels, upregulating SIRT1, Bcl-2 expressions, and downregulating Bax and caspase-3 expressions. Stnl attenuated these effects by inhibiting SIRT1 signaling. BBR treatment also reduced myocardium superoxide generation, gp91phox expression, malondialdehyde (MDA) level, and cardiac inflammatory markers and increased myocardium superoxide dismutase (SOD) level. However, these effects were also inhibited by Stnl. Consistently, BBR conferred similar antioxidative and anti-inflammatory effects against simulated ischemia reperfusion injury in cultured H9C2 cardiomyocytes. SIRT1 siRNA administration also abolished these effects. In summary, our results demonstrate that BBR significantly improves post-MI/R cardiac function recovery and reduces infarct size against MI/R injury possibly due to its strong antioxidative and anti-inflammatory activity. Additionally, SIRT1 signaling plays a key role in this process.
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Zhou X, Wang D, Zhang Y, Zhang J, Xiang D, Wang H. Activation of κ-opioid receptor by U50,488H improves vascular dysfunction in streptozotocin-induced diabetic rats. BMC Endocr Disord 2015; 15:7. [PMID: 25887435 PMCID: PMC4355970 DOI: 10.1186/s12902-015-0004-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 02/18/2015] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Evidence suggests that activation of κ-opioid receptor (KOR) by U50,488H exhibits potential cardiovascular protective properties. However, the effects of U50,488H on vascular dysfunction in diabetes mellitus (DM) are still not clear. The present study was designed to investigate the effects of U50,488H on vascular dysfunction in diabetic rats and explore the underlying mechanisms involved. METHODS Rats were randomly divided into control, DM, DM + vehicle, DM + U50,488H and DM + nor-binaltorphimine (nor-BNI) groups. Streptozotocin injection was used to induce DM. Weight, blood glucose, blood pressure and plasma insulin for each group were measured. Arterial functions were assessed with isolated vessels mounted for isometric tension recordings. Angiotensin II (ANG II), soluble intercellular adhesion molecule-1 (sICAM-1), interleukin (IL)-6 and IL-8 levels were measured by ELISA, and endothelial nitric oxide synthase (eNOS) phosphorylation and NF-κB p65 translocation were measured by Western blot. RESULTS Activation of KOR by U50,488H reduced the enhanced contractility of aortas to KCl and noradrenaline and increased acetylcholine-induced vascular relaxation, which could also protect the aortal ultrastructure in DM. U50,488H treatment resulted in reduction in ANG II, sICAM-1, IL-6 and IL-8 levels and elevation in NO levels, while these effects were abolished by nor-BNI treatment. Further more, eNOS phosphorylation was increased, and NF-κB p65 translocation was decreased after U50,488H treatment. CONCLUSIONS Our study demonstrated that U50,488H may have therapeutic effects on diabetic vascular dysfunction by improving endothelial dysfunction and attenuating chronic inflammation, which may be dependent on phosphorylation of eNOS and downstream inhibition of NF-кB.
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MESH Headings
- 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer/pharmacology
- 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer/therapeutic use
- Animals
- Antihypertensive Agents/pharmacology
- Antihypertensive Agents/therapeutic use
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiopathology
- Diabetes Mellitus, Experimental/drug therapy
- Diabetes Mellitus, Experimental/physiopathology
- Diabetic Angiopathies/physiopathology
- Diabetic Angiopathies/prevention & control
- Endothelium, Vascular/drug effects
- Endothelium, Vascular/physiopathology
- Male
- Pulmonary Artery/drug effects
- Pulmonary Artery/physiopathology
- Rats
- Rats, Sprague-Dawley
- Receptors, Opioid, kappa/agonists
- Streptozocin
- Vasoconstriction/drug effects
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Affiliation(s)
- Xuan Zhou
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
- Department of Cardiology, General Hospital of Guang Zhou Military Command, Guangzhou, Guangdong, 510011, China.
| | - Dongjuan Wang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
- Department of Cardiology, PLA Navy General Hospital, Beijing, 100048, China.
| | - Yuyang Zhang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
| | - Jinxia Zhang
- Department of Cardiology, General Hospital of Guang Zhou Military Command, Guangzhou, Guangdong, 510011, China.
| | - Dingcheng Xiang
- Department of Cardiology, General Hospital of Guang Zhou Military Command, Guangzhou, Guangdong, 510011, China.
| | - Haichang Wang
- Department of Cardiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi, 710032, China.
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15
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Gein SV. Dynorphins in regulation of immune system functions. BIOCHEMISTRY (MOSCOW) 2015; 79:397-405. [PMID: 24954590 DOI: 10.1134/s0006297914050034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Dynorphins constitute a family of opioid peptides manifesting the highest affinity for κ-opiate receptors. Immune system cells are known to express a κ-receptor similar to that in the central nervous system, and as a consequence dynorphins are involved in the interaction between cells of the nervous and immune systems. In this review, data on dynorphin structure are analyzed and generalized, the κ-opiate receptor is characterized, and data on the regulation by dynorphins of functioning of the innate and adaptive immunity cells are summarized.
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Affiliation(s)
- S V Gein
- Institute of Ecology and Genetics of Microorganisms, Ural Branch of the Russian Academy of Sciences, Perm, 614081, Russia.
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16
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Fang S, Xu H, Lu J, Zhu Y, Jiang H. Neuroprotection by the kappa-opioid receptor agonist, BRL52537, is mediated via up-regulating phosphorylated signal transducer and activator of transcription-3 in cerebral ischemia/reperfusion injury in rats. Neurochem Res 2013; 38:2305-12. [PMID: 23996400 DOI: 10.1007/s11064-013-1139-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 08/16/2013] [Accepted: 08/20/2013] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to investigate whether the kappa-opioid receptor (KOR) agonist, BRL52537, has a neuroprotective effect against cerebral ischemia/reperfusion (I/R) injury in rats and further explore the underlying mechanisms. Adult male Sprague-Dawley rats were randomly assigned into sham (group A), I/R (group B), BRL52537 (KOR agonist) + I/R (group C), nor-BNI (nor-binaltorphimine, KOR antagonist) + I/R (group D), AG490 (STAT3 phosphorylation inhibitor) + I/R (group E), dimethyl sulfoxide (DMSO, vehicle of AG490) + I/R (group F), and BRL52537 + AG490 +I/R (group G) groups. Cerebral I/R injury was induced by 10 min exposure to global ischemia (4-VO). Histopathological changes and neuronal apoptosis were evaluated with H&E staining and the TUNEL assay, respectively. Expression levels of signal transducer and activator of transcription 3 (STAT3), phosphorylated STAT3 and caspase-3 were determined with western blot analysis. Our results showed that BRL52537 protects against I/R injury-induced brain damage and inhibits neuronal apoptosis to a significant extent. Additionally, BRL52537 promoted up-regulation of p-STAT3 and a marked decrease in caspase-3 expression. Based on the collective findings, we propose that the KOR agonist, BRL52537, protects against cerebral I/R injury via a mechanism involving STAT3 signaling.
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Affiliation(s)
- Shudong Fang
- Department of Anaesthesiology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 639 Zhi Zao Ju Road, Shanghai, 200011, China
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κ-Opioid receptor stimulation modulates TLR4/NF-κB signaling in the rat heart subjected to ischemia–reperfusion. Cytokine 2013; 61:842-8. [DOI: 10.1016/j.cyto.2013.01.002] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Revised: 08/23/2012] [Accepted: 01/04/2013] [Indexed: 01/04/2023]
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Wang Y, Zhang ZZ, Wu Y, Zhan J, He XH, Wang YL. Honokiol protects rat hearts against myocardial ischemia reperfusion injury by reducing oxidative stress and inflammation. Exp Ther Med 2012; 5:315-319. [PMID: 23251290 PMCID: PMC3523945 DOI: 10.3892/etm.2012.766] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Accepted: 10/18/2012] [Indexed: 11/12/2022] Open
Abstract
Honokiol, a potent radical scavenger, has been demonstrated to ameliorate cerebral infarction following ischemia/reperfusion (I/R) injury. However, its effects on myocardial I/R injury remain unclear. The present study aimed to examine the effects of honokiol on myocardial I/R injury and to investigate its potential cardioprotective mechanisms. Sprague-Dawley rats were pretreated with honokiol and exposed to a 30-min myocardial ischemia followed by 2-h coronary reperfusion. Myocardial I/R-induced infarct size and biochemical and histological changes were compared. The expression of nuclear factor κB(NF-κB; p65) was assessed by western blotting. Pretreatment with honokiol significantly reduced infarct size, and serum creatine kinase (CK) and lactate dehydrogenase (LDH) release compared with those in the I/R group following a 2-h reperfusion. The malondialdehyde (MDA) level, myeloperoxidase (MPO) activity, concentrations of tumor necrosis factor (TNF)-α and interleukin (IL)-6 and expression level of NF-κB were all reduced by honokiol pretreatment, while honokiol inhibited the decreases in superoxide dismutase (SOD) and catalase (CAT) activities. In addition, less neutrophil infiltration and histopathological damage in the myocardium were observed in the honokiol-pretreated group. These findings indicate that honokiol pretreatment diminished myocardial I/R injury through attenuation of oxidative stress and inflammation.
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Affiliation(s)
- Yun Wang
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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