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Gananandan K, Wiese S, Møller S, Mookerjee RP. Cardiac dysfunction in patients with cirrhosis and acute decompensation. Liver Int 2024; 44:1832-1841. [PMID: 38712826 DOI: 10.1111/liv.15896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 02/25/2024] [Accepted: 03/04/2024] [Indexed: 05/08/2024]
Abstract
The prevalence of cirrhotic cardiomyopathy (CCM) has been reported as high as 60%-70% in patients with liver cirrhosis and is associated with various negative outcomes. There has been a growing understanding of CCM over recent years. Indeed, the development of imaging techniques has enabled new diagnostic criteria to be proposed by the Cirrhotic Cardiomyopathy Consortium. However, important unanswered questions remain over pathophysiological mechanisms, optimal diagnostic modalities and potential treatment options. While there has been an increasing volume of literature evaluating CCM, there is a lack of clarity on its implications in acute decompensation, acute-on-chronic liver failure and following interventions such as transjugular intrahepatic portosystemic shunt insertion and liver transplantation. This review aims to summarise the literature in these challenging domains and suggest where future research should focus. We conclude that systemic inflammation and structural myocardial changes are likely to be crucial in the pathophysiology of the disease, but the relative contribution of different components remains elusive. Furthermore, future studies need to use standardised diagnostic criteria for CCM as well as incorporate newer imaging techniques assessing both myocardial structure and function. Finally, while specific treatments are currently lacking, therapeutics targeting systemic inflammation, microbial dysbiosis and bacterial translocation are promising targets and warrant further research.
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Affiliation(s)
- Kohilan Gananandan
- Liver Failure Group, Institute for Liver and Digestive Health, University College London, London, UK
| | - Signe Wiese
- Centre of Functional Imaging and Research, Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen, Copenhagen, Denmark
- Gastroenterology Unit, Medical Division, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Søren Møller
- Centre of Functional Imaging and Research, Department of Clinical Physiology and Nuclear Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Rajeshwar P Mookerjee
- Liver Failure Group, Institute for Liver and Digestive Health, University College London, London, UK
- Department of Hepatology and Gastroenterology, Aarhus University Hospital, Aarhus, Denmark
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Lim L, Kim H, Jeong J, Han SH, Yu YB, Song H. Yohimbine Inhibits PDGF-Induced Vascular Smooth Muscle Cell Proliferation and Migration via FOXO3a Factor. Int J Mol Sci 2024; 25:6899. [PMID: 39000009 PMCID: PMC11240894 DOI: 10.3390/ijms25136899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/16/2024] [Accepted: 06/21/2024] [Indexed: 07/14/2024] Open
Abstract
Yohimbine (YHB) has been reported to possess anti-inflammatory, anticancer, and cardiac function-enhancing properties. Additionally, it has been reported to inhibit the proliferation, migration, and neointimal formation of vascular smooth muscle cells (VSMCs) induced by platelet-derived growth factor (PDGF) stimulation by suppressing the phospholipase C-gamma 1 pathway. However, the transcriptional regulatory mechanism of YHB controlling the behavior of VSMCs is not fully understood. In this study, YHB downregulated the expression of cell cycle regulatory proteins, such as proliferating cell nuclear antigen (PCNA), cyclin D1, cyclin-dependent kinase 4 (CDK4), and cyclin E, by modulating the transcription factor FOXO3a in VSMCs induced by PDGF. Furthermore, YHB decreased p-38 and mTOR phosphorylation in a dose-dependent manner. Notably, YHB significantly reduced the phosphorylation at Y397 and Y925 sites of focal adhesion kinase (FAK), and this effect was greater at the Y925 site than Y397. In addition, the expression of paxillin, a FAK-associated protein known to bind to the Y925 site of FAK, was significantly reduced by YHB treatment in a dose-dependent manner. A pronounced reduction in the migration and proliferation of VSMCs was observed following co-treatment of YHB with mTOR or p38 inhibitors. In conclusion, this study shows that YHB inhibits the PDGF-induced proliferation and migration of VSMCs by regulating the transcription factor FOXO3a and the mTOR/p38/FAK signaling pathway. Therefore, YHB may be a potential therapeutic candidate for preventing and treating cardiovascular diseases such as atherosclerosis and vascular restenosis.
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MESH Headings
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/drug effects
- Forkhead Box Protein O3/metabolism
- Cell Proliferation/drug effects
- Cell Movement/drug effects
- Animals
- Platelet-Derived Growth Factor/metabolism
- Platelet-Derived Growth Factor/pharmacology
- Myocytes, Smooth Muscle/metabolism
- Myocytes, Smooth Muscle/drug effects
- Phosphorylation/drug effects
- Yohimbine/pharmacology
- Rats
- Signal Transduction/drug effects
- TOR Serine-Threonine Kinases/metabolism
- p38 Mitogen-Activated Protein Kinases/metabolism
- Focal Adhesion Kinase 1/metabolism
- Cells, Cultured
- Paxillin/metabolism
- Rats, Sprague-Dawley
- Male
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Affiliation(s)
- Leejin Lim
- Advanced Cancer Controlling Research Center, Chosun University, Gwangju 61452, Republic of Korea
| | - Hyeonhwa Kim
- Department of Biomedical Sciences, Chosun University Graduate School, Gwangju 61452, Republic of Korea
| | - Jihye Jeong
- Department of Biomedical Sciences, Chosun University Graduate School, Gwangju 61452, Republic of Korea
| | - Sung Hee Han
- Institute of Human Behavior & Genetics, Biomedical Research Center, Korea University, Seoul 02841, Republic of Korea
| | - Young-Bob Yu
- Department of Paramedicine, Nambu University, Gwangju 62271, Republic of Korea
| | - Heesang Song
- Advanced Cancer Controlling Research Center, Chosun University, Gwangju 61452, Republic of Korea
- Department of Biomedical Sciences, Chosun University Graduate School, Gwangju 61452, Republic of Korea
- Department of Biochemistry and Molecular Biology, Chosun University School of Medicine, Gwangju 61452, Republic of Korea
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3
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Szabo B. Presynaptic Adrenoceptors. Handb Exp Pharmacol 2024. [PMID: 38755350 DOI: 10.1007/164_2024_714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Presynaptic α2-adrenoceptors are localized on axon terminals of many noradrenergic and non-noradrenergic neurons in the peripheral and central nervous systems. Their activation by exogenous agonists leads to inhibition of the exocytotic release of noradrenaline and other transmitters from the neurons. Most often, the α2A-receptor subtype is involved in this inhibition. The chain of molecular events between receptor occupation and inhibition of the exocytotic release of transmitters has been determined. Physiologically released endogenous noradrenaline elicits retrograde autoinhibition of its own release. Some clonidine-like α2-receptor agonists have been used to treat hypertension. Dexmedetomidine is used for prolonged sedation in the intensive care; It also has a strong analgesic effect. The α2-receptor antagonist mirtazapine increases the noradrenaline concentration in the synaptic cleft by interrupting physiological autoinhibion of release. It belongs to the most effective antidepressive drugs. β2-Adrenoceptors are also localized on axon terminals in the peripheral and central nervous systems. Their activation leads to enhanced transmitter release, however, they are not activated by endogenous adrenaline.
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Affiliation(s)
- Bela Szabo
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany.
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Veeram A, Shaikh TB, Kaur R, Chowdary EA, Andugulapati SB, Sistla R. Yohimbine Treatment Alleviates Cardiac Inflammation/Injury and Improves Cardiac Hemodynamics by Modulating Pro-Inflammatory and Oxidative Stress Indicators. Inflammation 2024:10.1007/s10753-024-01985-9. [PMID: 38466531 DOI: 10.1007/s10753-024-01985-9] [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: 09/21/2023] [Revised: 01/16/2024] [Accepted: 02/05/2024] [Indexed: 03/13/2024]
Abstract
Acute myocarditis, also known as myocardial inflammation, is a self-limited condition caused by systemic infection with cardiotropic pathogens, primarily viruses, bacteria, or fungi. Despite significant research, inflammatory cardiomyopathy exacerbated by heart failure, arrhythmia, or left ventricular dysfunction and it has a dismal prognosis. In this study, we aimed to evaluate the therapeutic effect of yohimbine against lipopolysaccharide (LPS) induced myocarditis in rat model. The anti-inflammatory activity of yohimbine was assessed in in-vitro using RAW 264.7 and H9C2 cells. Myocarditis was induced in rats by injecting LPS (10 mg/kg), following the rats were treated with dexamethasone (2 mg/kg) or yohimbine (2.5, 5, and 10 mg/kg) for 12 h and their therapeutic activity was examined using various techniques. Yohimbine treatment significantly attenuated the LPS-mediated inflammatory markers expression in the in-vitro model. In-vivo studies proved that yohimbine treatment significantly reduced the LPS-induced increase of cardiac-specific markers, inflammatory cell counts, and pro-inflammatory markers expression compared to LPS-control samples. LPS administration considerably affected the ECG, RR, PR, QRS, QT, ST intervals, and hemodynamic parameters, and caused abnormal pathological parameters, in contrast, yohimbine treatment substantially improved the cardiac parameters, mitigated the apoptosis in myocardial cells and ameliorated the histopathological abnormalities that resulted in an improved survival rate. LPS-induced elevation of cardiac troponin-I, myeloperoxidase, CD-68, and neutrophil elastase levels were significantly attenuated upon yohimbine treatment. Further investigation showed that yohimbine exerts an anti-inflammatory effect partly by modulating the MAPK pathway. This study emphasizes yohimbine's therapeutic benefit against LPS-induced myocarditis and associated inflammatory markers response by regulating the MAPK pathway.
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Affiliation(s)
- Anjali Veeram
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India
| | - Taslim B Shaikh
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India
| | - Rajwinder Kaur
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India
| | - E Abhisheik Chowdary
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India
| | - Sai Balaji Andugulapati
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India.
| | - Ramakrishna Sistla
- Department of Applied Biology, CSIR-Indian Institute of Chemical Technology, Hyderabad, 500 007, Telangana, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh, 201 002, India.
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Su X, Lu F, Chen Y, Wang M, Tang G, Lin W, Liu Y, Wang H, Yin H, Wang Y. α 2 -ADRENORECEPTOR ANTAGONIST AMELIORATES SEPSIS-ASSOCIATED PULMONARY FIBROSIS BY SUPPRESSING NOREPINEPHRINE-MEDIATED FIBROBLAST DIFFERENTIATION VIA INHIBITING PKC ACTIVATION. Shock 2023; 60:771-780. [PMID: 37878498 DOI: 10.1097/shk.0000000000002240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
ABSTRACT Pulmonary fibrosis is an important factor affecting the prognosis of severe septic patients with acute lung injury. The objective of this study was to explore the effect of norepinephrine (NE) and α 2 -adrenoreceptor (AR) on sepsis-associated pulmonary fibrosis and the mechanism underlying these effects. We found pulmonary fibrotic changes, and increased NE production and α 2A -AR expression in the pulmonary tissue of mice subjected to cecal ligation and puncture surgery. Reserpine and yohimbine alleviated pulmonary fibrosis in mice with sepsis by exhausting NE derived from the lung's adrenergic nerve and blocking α 2 -AR, respectively. There was no significant difference in the expression of the three α 1 -AR subtypes. The effect of NE on promoting pulmonary fibroblast differentiation in vitro was suppressed by yohimbine. Both the protein and mRNA expression levels of α 2A -AR were increased in pulmonary fibroblasts treated with LPS. Clonidine, a selective α 2 -AR agonist, enhanced LPS-induced differentiation in pulmonary fibroblasts, as indicated by the increase in α-smooth muscle actin and collagen I/III, which was mitigated by inhibiting PKC and p38. Further in vivo results indicated that yohimbine alleviated pulmonary fibrosis and inhibited the phosphorylation of PKC, p38, and Smad2/3 in lung tissue of mice exposed to LPS for 4 weeks. Clonidine showed the opposite effect to yohimbine, which aggravated LPS-induced pulmonary fibrosis. These findings demonstrated that the sepsis-induced increase in NE promoted fibroblast differentiation via activating α 2 -AR. Blockage of α 2 -AR effectively ameliorated sepsis-associated pulmonary fibrosis by abolishing NE-induced lung fibroblast differentiation and inhibiting the PKC-p38-Smad2/3 pathway.
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Affiliation(s)
- Xingyu Su
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Fan Lu
- Department of Critical Care Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yihua Chen
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Miao Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Guoqing Tang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Wan Lin
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Yingwen Liu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Huadong Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
| | - Haiyan Yin
- Department of Critical Care Medicine, The First Affiliated Hospital of Jinan University, Guangzhou, China
| | - Yiyang Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, China
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6
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Hobai IA. MECHANISMS OF CARDIAC DYSFUNCTION IN SEPSIS. Shock 2023; 59:515-539. [PMID: 36155956 DOI: 10.1097/shk.0000000000001997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Studies in animal models of sepsis have elucidated an intricate network of signaling pathways that lead to the dysregulation of myocardial Ca 2+ handling and subsequently to a decrease in cardiac contractile force, in a sex- and model-dependent manner. After challenge with a lethal dose of LPS, male animals show a decrease in cellular Ca 2+ transients (ΔCa i ), with intact myofilament function, whereas female animals show myofilament dysfunction, with intact ΔCa i . Male mice challenged with a low, nonlethal dose of LPS also develop myofilament desensitization, with intact ΔCa i . In the cecal ligation and puncture (CLP) model, the causative mechanisms seem similar to those in the LPS model in male mice and are unknown in female subjects. ΔCa i decrease in male mice is primarily due to redox-dependent inhibition of sarco/endoplasmic reticulum Ca 2+ ATP-ase (SERCA). Reactive oxygen species (ROS) are overproduced by dysregulated mitochondria and the enzymes NADPH/NADH oxidase, cyclooxygenase, and xanthine oxidase. In addition to inhibiting SERCA, ROS amplify cardiomyocyte cytokine production and mitochondrial dysfunction, making the process self-propagating. In contrast, female animals may exhibit a natural redox resilience. Myofilament dysfunction is due to hyperphosphorylation of troponin I, troponin T cleavage by caspase-3, and overproduction of cGMP by NO-activated soluble guanylate cyclase. Depleted, dysfunctional, or uncoupled mitochondria likely synthesize less ATP in both sexes, but the role of energy deficit is not clear. NO produced by NO synthase (NOS)-3 and mitochondrial NOSs, protein kinases and phosphatases, the processes of autophagy and sarco/endoplasmic reticulum stress, and β-adrenergic insensitivity may also play currently uncertain roles.
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Affiliation(s)
- Ion A Hobai
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts
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Hobai IA. CARDIOMYOCYTE REPROGRAMMING IN ANIMAL MODELS OF SEPTIC SHOCK. Shock 2023; 59:200-213. [PMID: 36730767 DOI: 10.1097/shk.0000000000002024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
ABSTRACT Cardiomyocyte reprogramming plays a pivotal role in sepsis-induced cardiomyopathy through the induction or overexpression of several factors and enzymes, ultimately leading to the characteristic decrease in cardiac contractility. The initial trigger is the binding of LPS to TLR-2, -3, -4, and -9 and of proinflammatory cytokines, such as TNF, IL-1, and IL-6, to their respective receptors. This induces the nuclear translocation of nuclear factors, such as NF-κB, via activation of MyD88, TRIF, IRAK, and MAPKs. Among the latter, ROS- and estrogen-dependent p38 and ERK 1/2 are proinflammatory, whereas JNK may play antagonistic, anti-inflammatory roles. Nuclear factors induce the synthesis of cytokines, which can amplify the inflammatory signal in a paracrine fashion, and of several effector enzymes, such as NOS-2, NOX-1, and others, which are ultimately responsible for the degradation of cardiomyocyte contractility. In parallel, the downregulation of enzymes involved in oxidative phosphorylation causes metabolic reprogramming, followed by a decrease in ATP production and the release of fragmented mitochondrial DNA, which may augment the process in a positive feedback loop. Other mediators, such as NO, ROS, the enzymes PI3K and Akt, and adrenergic stimulation may play regulatory roles, but not all signaling pathways that mediate cardiac dysfunction of sepsis do that by regulating reprogramming. Transcription may be globally modulated by miRs, which exert protective or amplifying effects. For all these mechanisms, differentiating between modulation of cardiomyocyte reprogramming versus systemic inflammation has been an ongoing but worthwhile experimental challenge.
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Affiliation(s)
- Ion A Hobai
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, 55 Fruit Street, GRB 444, Boston, MA
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Jabir NR, Firoz CK, Zughaibi TA, Alsaadi MA, Abuzenadah AM, Al-Asmari AI, Alsaieedi A, Ahmed BA, Ramu AK, Tabrez S. A literature perspective on the pharmacological applications of yohimbine. Ann Med 2022; 54:2861-2875. [PMID: 36263866 PMCID: PMC9590431 DOI: 10.1080/07853890.2022.2131330] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Introduction: Phytochemicals have garnered much attention because they are useful in managing several human diseases. Yohimbine is one such phytochemical with significant pharmacological potential and could be exploited for research by medicinal chemists. It is an indole alkaloid obtained from various natural/synthetic sources.Aims and Results: The research on yohimbine started early, and its use as a stimulant and aphrodisiac by humans has been reported for a long time. The pharmacological activity of yohimbine is mediated by the combined action of the central and peripheral nervous systems. It selectively blocks the pre and postsynaptic α2-adrenergic receptors and has a moderate affinity for α1 and α2 subtypes. Yohimbine also binds to other behaviourally relevant monoaminergic receptors in the following order: α-2 NE > 5HT-1A>, 5HT-1B > 1-D > D3 > D2 receptors.Conclusion: The current review highlights some significant findings that contribute to developing yohimbine-based drugs. It also highlights the therapeutic potential of yohimbine against selected human diseases. However, further research is recommended on the pharmacokinetics, molecular mechanisms, and drug safety requirements using well-designed randomized clinical trials to produce yohimbine as a pharmaceutical agent for human use.Key MessagesYohimbine is a natural indole alkaloid with significant pharmacological potential.Humans have used it as a stimulant and aphrodisiac from a relatively early time.It blocks the pre- and postsynaptic α2-adrenergic receptors that could be exploited for managing erectile dysfunction, myocardial dysfunction, inflammatory disorders, and cancer.
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Affiliation(s)
- Nasimudeen R Jabir
- Department of Biochemistry and Biotechnology, Centre for Research and Development, PRIST University, Vallam, Thanjavur, India
| | - Chelapram K Firoz
- Department of Medical Laboratory Technology, MIMS College of Allied Health Sciences, ASTER MIMS Academy, Malappuram, Kerala University of Health Sciences, Kerala, India
| | - Torki A Zughaibi
- Toxicology and Forensic Science Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohammed Abdullah Alsaadi
- Hematology Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Adel M Abuzenadah
- Toxicology and Forensic Science Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed Ibrahim Al-Asmari
- Toxicology and Forensic Science Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Laboratory Department, King Abdul-Aziz Hospital, Ministry of Health, Jeddah, Saudi Arabia
| | - Ahdab Alsaieedi
- Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.,Vaccines and Immunotherapy Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Bakrudeen Ali Ahmed
- Department of Biochemistry and Biotechnology, Centre for Research and Development, PRIST University, Vallam, Thanjavur, India
| | - Arun Kumar Ramu
- Department of Biochemistry and Biotechnology, Centre for Research and Development, PRIST University, Vallam, Thanjavur, India
| | - Shams Tabrez
- Toxicology and Forensic Science Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Medical Laboratory Sciences, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
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Red Palm Oil Ameliorates Oxidative Challenge and Inflammatory Responses Associated with Lipopolysaccharide-Induced Hepatic Injury by Modulating NF-κβ and Nrf2/GCL/HO-1 Signaling Pathways in Rats. Antioxidants (Basel) 2022; 11:antiox11081629. [PMID: 36009348 PMCID: PMC9404920 DOI: 10.3390/antiox11081629] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/16/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
Lipopolysaccharide (LPS), a well-conserved cell wall component of Gram positive bacteria, exerts its toxic effects via inducing oxidative and pro-inflammatory responses. Red palm oil (RPO) is a unique natural product with a balanced ratio of saturated and unsaturated fatty acids, with reported antioxidant and anti-inflammatory effects. In this study, we assess the protective effect and mechanistic action of RPO using a lipopolysaccharide (LPS)-induced hepatic injury model. Male Wistar rats were assigned into four groups (10 animals/group): normal control (NC), RPO, LPS and RPO + LPS. Animals in the RPO and RPO + LPS groups were administered RPO (200 μL/day) for 28 days. On the 27th day of experiment, animals in LPS and RPO + LPS groups were injected with LPS (0.5 mg/kg body weight). Animals were sacrificed 24 h later, and blood and liver tissues harvested for biochemical and molecular analysis. RPO resolved hepatic histological dysfunction induced by LPS, and lowered alanine aminotransferase, aspartate aminotransferase, alkaline phosphatase and γ-glutamyl transferase activities in the serum. Hepatic malondialdehyde and conjugated dienes, as well as pro-inflammatory cytokines, including interleukin (IL)-1β, IL-6 and TNFα were significantly diminished (p < 0.05) by RPO pre-treatment. Activity of hepatic antioxidant enzymes including superoxide dismutase, glutathione reductase, glutathione peroxidase, as well as glutathione redox status (GSH:GSSG), and markers of antioxidant capacity that decreased as a result of LPS injection were improved by RPO pre-treatment. Mechanistically, RPO up-regulated mRNA expression of redox sensitive transcription factor Nrf2 and its downstream targets GCL and HO-1, while also suppressing the expression of NFκβ and associated inflammatory protein, Iκβ kinase (IκKβ). In conclusion, this study highlights the ameliorating effects of RPO against LPS-induced hepatic injury and revealed the Nrf2/GCL/HO-1 and NFκβ signaling axis as potential contributing mechanisms.
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10
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Effects of Acute Yohimbine Hydrochloride Supplementation on Repeated Supramaximal Sprint Performance. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19031316. [PMID: 35162339 PMCID: PMC8835515 DOI: 10.3390/ijerph19031316] [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: 12/30/2021] [Revised: 01/17/2022] [Accepted: 01/21/2022] [Indexed: 12/21/2022]
Abstract
The purpose of this study was to examine the effects of a single acute dose of yohimbine hydrochloride on repeated anaerobic sprint ability. Physically active females (n = 18) completed two separate repeated supramaximal sprint trials each with a different single-dose treatment: placebo (PL; gluten-free corn starch) or yohimbine hydrochloride (YHM; 2.5 mg). For each trial, participants consumed their respective treatment 20 min before exercise. Following a warm-up, participants completed 3 × 15 s Wingate anaerobic tests (WAnTs) separated by 2 min of active recovery. A capillary blood sample was obtained pre- and immediately post-exercise to measure blood concentrations of lactate (LA), epinephrine (EPI), and norepinephrine (NE). Heart rate (HR) and rate of perceived exertion (RPE) were measured following each WAnT. Findings showed that mean power (p < 0.001; η2 = 0.024), total work (p < 0.001; η2 = 0.061), and HR (p < 0.001; η2 = 0.046), were significantly higher with YHM supplementation versus PL. Fatigue index (p < 0.001; η2 = 0.054) and post-exercise LA (p < 0.001; d = 1.26) were significantly lower with YHM compared to PL. YHM resulted in significantly higher EPI concentrations versus PL (p < 0.001; η2 = 0.225) pre- and post-exercise while NE only increased as a function of time (p < 0.001; η2 = 0.227) and was unaffected by treatment. While RPE increased after each WAnT, no differences between treatments were observed (p = 0.539; η2 < 0.001). Together, these results suggest that acute YHM ingestion imparts ergogenic benefits which may be mediated by lower blood LA and fatigue concomitantly occurring with blood EPI increases. Thus, YHM may improve sprint performance although more mechanistic study is warranted to accentuate underlying processes mediating performance enhancement.
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11
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Tang X, Xu Y, Dai X, Xing Y, Yang D, Huang Q, Li H, Lv X, Wang Y, Lu D, Wang H. The Long-term Effect of Dobutamine on Intrinsic Myocardial Function and Myocardial Injury in Septic Rats with Myocardial Dysfunction. Shock 2021; 56:582-592. [PMID: 34524268 DOI: 10.1097/shk.0000000000001718] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
ABSTRACT Dobutamine (DOB) is recommended as an inotrope for septic patients with low cardiac output, but its long-term impact on sepsis-induced cardiomyopathy remains unclear. This study investigated the long-term effect of DOB on septic myocardial dysfunction and injury. Rats were exposed to cecal ligation and puncture (CLP), the intrinsic myocardial function, other organ functions, hemodynamics, inflammatory response, serum myocardial injury biomarkers, myocardial apoptosis, and vascular permeability were determined. At 6 h after CLP, the left ventricular ±dP/dt were significantly depressed, cardiac tumor necrosis factor-α and vascular cell adhesion molecule-1 expression were increased, but not serum cardiac troponin I (cTnI), N-terminal pro-brain natriuretic peptide (NT-proBNP), heart-type fatty acid-binding protein (H-FABP), creatinine, and urea nitrogen concentrations in CLP group compared with controls. At 9 h after CLP, hepatic dysfunction was present in CLP rats compared with controls. At 6 h after CLP, DOB treatment did not affect hemodynamics, the left ventricular ±dP/dt, cytokine levels in serum and myocardium, as well as cardiomyocyte apoptosis and cardiac vascular hyperpermeability at 20 h after CLP. However, DOB (10.0 μg/kg) increased serum IL-10 level and improved survival in septic rats. These results indicate that the intrinsic myocardial depression occurs earlier than hepatic and renal dysfunction in sepsis and serum cTnI, NT-proBNP, and H-FABP are not suitable as early biomarkers for sepsis-induced myocardial dysfunction. Although DOB treatment (10.0 μg/kg) in the presence of myocardial dysfunction improves survival in septic rats, it neither improves myocardial function and hemodynamics nor attenuates myocardial injury at the later stage of sepsis.
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Affiliation(s)
- Xiangxu Tang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
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Silencing Cardiac Troponin I-Interacting Kinase Reduces Lipopolysaccharide-Induced Sepsis-Induced Myocardial Dysfunction in Rat by Regulating Apoptosis-Related Proteins. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5520051. [PMID: 34136567 PMCID: PMC8175134 DOI: 10.1155/2021/5520051] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/13/2021] [Indexed: 11/18/2022]
Abstract
The aim of this study was to investigate the effect of cardiac troponin I-interacting kinase (TNNI3K) on sepsis-induced myocardial dysfunction (SIMD) and further explore the underlying molecular mechanisms. In this study, a lipopolysaccharide- (LPS-) induced myocardial injury model was used. qRT-PCR was performed to detect the mRNA expression of TNNI3K. Western blot was conducted to quantitatively detect the expression of TNNI3K and apoptosis-related proteins (Bcl-2, Bax, and caspase-3). ELISA was performed to detect the content of lactate dehydrogenase (LDH) and creatine kinase (CK). TUNEL assay was used to detect the apoptosis of H9C2 cells. In LPS-induced H9C2 cells, TNNI3K was up regulated. Besides, the CK activity, the content of LDH, and the apoptosis of H9C2 cells were significantly increased after treatment with LPS. Silencing TNNI3K decreased the LDH release activity and CK activity and inhibited apoptosis of H9C2 cell. Further research illustrated that si-TNNI3K promoted the protein expression of Bcl-2 and decreased the protein expression of Bax and cleaved caspase-3. The study concluded that TNNI3K was upregulated in LPS-induced H9C2 cells. Importantly, functional research findings indicated that silencing TNNI3K alleviated LPS-induced H9C2 cell injury by regulating apoptosis-related proteins.
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Huang Q, Liu DH, Chen CF, Han Y, Huang ZQ, Zhang JW, Zeng XM. Pgc-1α Promotes Phosphorylation, Inflammation, and Apoptosis in H9c2 Cells During the Early Stage of Lipopolysaccharide Induction. Inflammation 2021; 44:1771-1781. [PMID: 33847873 DOI: 10.1007/s10753-021-01453-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 02/05/2021] [Accepted: 03/15/2021] [Indexed: 11/26/2022]
Abstract
Cardiac dysfunction in severe sepsis is associated with increased mortality. However, the molecular mechanisms underlying septic heart dysfunction remain unclear. Expression of peroxisome proliferator-activated receptor-γ coactivator 1α (Pgc-1α), concentrations of inflammatory factors, and activation of the nuclear factor kappa-B (NF-κB) signaling pathway were examined in H9c2 cells after a 24-h lipopolysaccharide (LPS) stimulation period using qPCR, enzyme-linked immunosorbent assays (ELISAs), and western blots (WBs), respectively. Pgc-1α was overexpressed and suppressed in cells using a lentivirus vector and siRNA, respectively. The effects of Pgc-1α dysfunction on the release of inflammatory factors and apoptosis were analyzed. Pgc-1α expression was increased after LPS induction for 0.5 h and returned to the pre-induction level at 2 h. Levels of IL-1β, IL-6, and TNF-α increase after LPS induction for 0.5 h and accumulated in the culture supernatants over time. The WBs revealed the highest Pgc-1α and phospho (p)-p65 protein levels after LPS induction for 0.5 h, followed by a decrease; moreover, the cleaved-caspase-3 level increased after LPS induction for 0.5 h and increased gradually thereafter. A functional analysis of Pgc-1α revealed that overexpression of this protein enhanced LPS-induced inflammatory factors and p-p65 levels and inhibited apoptosis during the early stage after LPS induction (0.5 and 4 h). In contrast, the inhibition of Pgc-1α expression inhibited the LPS expression-associated increases in inflammatory factors and p-p65 and promoted apoptosis. Pgc-1α promoted LPS-induced p65 phosphorylation and inflammatory factor release while inhibiting apoptosis.
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Affiliation(s)
- Qun Huang
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
| | - De-Hong Liu
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China.
| | - Chang-Feng Chen
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
| | - Yong Han
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
| | - Zhi-Qiang Huang
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
| | - Ji-Wen Zhang
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
| | - Xiao-Mei Zeng
- Emergency Department, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, No.3002 Sungang West Road, Shenzhen, 518035, Guangdong, People's Republic of China
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α2A-adrenoceptor deficiency attenuates lipopolysaccharide-induced lung injury by increasing norepinephrine levels and inhibiting alveolar macrophage activation in acute respiratory distress syndrome. Clin Sci (Lond) 2020; 134:1957-1971. [PMID: 32643759 DOI: 10.1042/cs20200586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/01/2020] [Accepted: 07/09/2020] [Indexed: 01/04/2023]
Abstract
Acute respiratory distress syndrome (ARDS) is a severe condition with high morbidity and mortality and few interventions. The role of sympathetic stress in the pathogenesis of ARDS has attracted recent research attention. Blockade of α-2 or α2A-adrenoceptor (α2A-AR) has been shown to attenuate lung injury induced by lipopolysaccharide (LPS) in rats. However, the mechanism is unclear. We confirmed the role of α2A-AR in ARDS using knockout mice and alveolar macrophages following LPS stimulation to assess the underlying mechanisms. We found that α2A-AR deficiency decreased the permeability of the alveolar capillary barrier in ARDS mice and suppressed lung inflammation by reducing inflammatory cell infiltration and the production of TNF-α, interleukin (IL)-6, and CXCL2/MIP-2. LPS stimulation decreased NF-κB activation in lung tissues of α2A-AR deficient mice and increased norepinephrine concentrations. In vitro, we found that norepinephrine inhibited the production of TNF-α, IL-6, and CXCL2/MIP-2 and promoted the secretion of IL-10 from LPS-stimulated murine alveolar macrophages. Blockade of α2A-AR by a specific antagonist further inhibited the production of TNF-α, IL-6, and IL-10. Furthermore, norepinephrine down-regulated NF-κB activation in stimulated alveolar macrophages. Altogether, these results suggest that α2A-AR deficiency ameliorates lung injury by increasing norepinephrine concentrations in lung tissues and inhibiting the activation of alveolar macrophages.
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15
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Asci H, Ozmen O, Erzurumlu Y, Savas HB, Temel EN, Icten P, Hasseyid N. Ameliorative effects of pregabalin on LPS induced endothelial and cardiac toxicity. Biotech Histochem 2020; 96:364-375. [PMID: 32921172 DOI: 10.1080/10520295.2020.1810315] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
We investigated the antioxidant, anti-inflammatory and anti-apoptotic effects of pregabalin (PREG) on lipopolysaccharide (LPS) induced sepsis related cardiotoxicity via NF-kβ pathways. We used 24 female Wistar albino rats divided into three groups: control, LPS treated and LPS + PREG treated. Total oxidant status (TOS), total antioxidant status (TAS), oxidative stress index (OSI), tumor necrosis factor alpha (TNF-α), nuclear factor kappa beta (NF-kβ)/p65, p-NF-kβ/p65, caspase-3 (Cas-3) and cleaved Cas-3 were measured in cardiac tissues and creatine kinase MB (CKMB), aspartate aminotransferase (AST), lactate dehydrogenase (LDH) levels were measured in blood samples. Also, Cas-3, granulocyte-colony stimulating factors (G-CSF), interleukin-6 (IL-6), serum amyloid A (SAA) and inducible nitric oxide synthase (iNOS) were measured immunohistochemically in heart and aorta tissue. In the LPS group; the levels of CKMB, AST, LDH, TOS, OSI increased and TAS decreased. TNF-α, p-NF-kβ/p65 and Cas-3 protein levels also increased in the LPS group. Immunohistochemical evaluation of the heart and aorta revealed a significant increase in the levels of Cas-3, G-CSF, SAA, IL-6 and iNOS in the LPS group. PREG treatment restored all measurements to near normal. LPS induced cardiovascular toxicity was due to inflammation, oxidative stress and apoptosis. PREG ameliorated the damage by inhibition of NF-kβ phosphorylation.
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Affiliation(s)
- H Asci
- Department of Pharmacology, Faculty of Medicine/Medicine, Medical Device and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey
| | - O Ozmen
- Department of Pathology, Faculty of Veterinary Medicine, Mehmet Akif Ersoy University, Burdur, Turkey
| | - Y Erzurumlu
- Department of Biochemistry, Faculty of Pharmacy, Suleyman Demirel University, Isparta, Turkey
| | - H B Savas
- Department of Medical Biochemistry, Faculty of Medicine, Alanya Alaaddin Keykubat University, Antalya, Turkey
| | - E N Temel
- Department of Infectious Diseases and Clinical Microbiology, Faculty of Medicine, Suleyman Demirel University, Isparta, Turkey
| | - P Icten
- Department of Pharmacology, Faculty of Medicine/Medicine, Medical Device and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey
| | - N Hasseyid
- Department of Pharmacology, Faculty of Medicine/Medicine, Medical Device and Dermocosmetic Research and Application Laboratory (IDAL), Suleyman Demirel University, Isparta, Turkey
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16
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Poveda-Jaramillo R. Heart Dysfunction in Sepsis. J Cardiothorac Vasc Anesth 2020; 35:298-309. [PMID: 32807603 DOI: 10.1053/j.jvca.2020.07.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 06/11/2020] [Accepted: 07/05/2020] [Indexed: 12/24/2022]
Abstract
Cardiac involvement during sepsis frequently occurs. A series of molecules induces a set of changes at the cellular level that result in the malfunction of the myocardium. The understanding of these molecular alterations has simultaneously promoted the implementation of diagnostic strategies that are much more precise and allowed the advance of the therapeutics. The heart is a vital organ for survival. Its well-being ensures the adequate supply of essential elements for organs and tissues.
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17
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Bloxham CJ, Foster SR, Thomas WG. A Bitter Taste in Your Heart. Front Physiol 2020; 11:431. [PMID: 32457649 PMCID: PMC7225360 DOI: 10.3389/fphys.2020.00431] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 04/08/2020] [Indexed: 12/11/2022] Open
Abstract
The human genome contains ∼29 bitter taste receptors (T2Rs), which are responsible for detecting thousands of bitter ligands, including toxic and aversive compounds. This sentinel function varies between individuals and is underpinned by naturally occurring T2R polymorphisms, which have also been associated with disease. Recent studies have reported the expression of T2Rs and their downstream signaling components within non-gustatory tissues, including the heart. Though the precise role of T2Rs in the heart remains unclear, evidence points toward a role in cardiac contractility and overall vascular tone. In this review, we summarize the extra-oral expression of T2Rs, focusing on evidence for expression in heart; we speculate on the range of potential ligands that may activate them; we define the possible signaling pathways they activate; and we argue that their discovery in heart predicts an, as yet, unappreciated cardiac physiology.
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Affiliation(s)
- Conor J Bloxham
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, St Lucia, QLD, Australia
| | - Simon R Foster
- Department of Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Walter G Thomas
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, St Lucia, QLD, Australia
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18
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Abstract
Purpose of Review To briefly review epidemiology and pathophysiology of SICM and provide a more extensive review of the data on diagnostic and management strategies. Recent Findings SICM is likely underdiagnosed and that has mortality implications. Current evidence supports speckle tracking echocardiography to identify decreased contractility irrespective of left ventricular ejection fraction for the diagnosis of SICM. There continues to be a dearth of large clinical trials evaluating the treatment of SICM and current consensus focuses on supportive measures such as vasopressors and inotropes. Summary Sepsis is a significant cause of mortality, and sepsis-induced cardiomyopathy has both prognostic and management implications for these patients. Individualized work-up and management of these patients is crucial to improving outcomes.
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Affiliation(s)
- Michael L'Heureux
- Division of Pulmonary Disease & Critical Care Medicine, Virginia Commonwealth University, P.O. Box 980050, Richmond, VA, 23298-0050, USA.
| | - Michael Sternberg
- Department of Internal Medicine, Virginia Commonwealth University, Richmond, VA, USA
| | - Lisa Brath
- Division of Pulmonary Disease & Critical Care Medicine, Virginia Commonwealth University, P.O. Box 980050, Richmond, VA, 23298-0050, USA
| | - Jeremy Turlington
- Division of Cardiology, Virginia Commonwealth University, Richmond, VA, USA
| | - Markos G Kashiouris
- Division of Pulmonary Disease & Critical Care Medicine, Virginia Commonwealth University, P.O. Box 980050, Richmond, VA, 23298-0050, USA
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Chang YT, Huang WC, Cheng CC, Ke MW, Tsai JS, Hung YM, Huang NC, Huang MS, Wann SR. Effects of epinephrine on heart rate variability and cytokines in a rat sepsis model. Bosn J Basic Med Sci 2020; 20:88-98. [PMID: 29984678 PMCID: PMC7029199 DOI: 10.17305/bjbms.2018.3565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2018] [Accepted: 06/06/2018] [Indexed: 01/31/2023] Open
Abstract
Catecholamines have both anti-inflammatory and vasoactive properties. A decreased cardiac response to catecholamines has been associated with a high risk of death in sepsis and septic shock. The aim of this study was to investigate the effects of epinephrine (EPI) on heart rate variability (HRV) and autonomic balance, as well as cytokine levels, in a rat sepsis model. Thirty-six male Sprague-Dawley rats were assigned to 4 experimental groups and 2 control groups of 6 rats each. The rats in the experimental groups were inoculated with a lipopolysaccharide (LPS, endotoxin) to establish a sepsis model. Group A received only LPS; group B received LPS, antecedent EPI and the nonselective β-blocker propranolol; group C received LPS and antecedent EPI; and group D received LPS, antecedent EPI and the selective β1-blocker esmolol. One control group received EPI and the other received saline placebo. Heart rate variability (HRV) was analyzed and tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and interleukin-1β (IL-1β) levels were measured. Measurements were carried out at baseline, at 0 hour after EPI infusion, and at 0.5, 2, and 4 hours after LPS inoculation. There were significant differences in HRV and cytokine levels between the groups, indicating that LPS infusion caused autonomic imbalance. Antecedent EPI significantly decreased the level of TNF-α in group C compared with group A in which TNF-α level peaked at 2 hours and then declined. Propranolol (group B) but not esmolol (group D) administration resulted in elevated TNF-α levels, comparable to those observed in group A. In conclusion, antecedent administration of EPI in a rat sepsis model inhibits the production of TNF-α possibly via the β2-adrenoceptor.
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Affiliation(s)
- Yun-Te Chang
- Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung City; Department of Nursing, Yuh-Ing Junior College of Health Care and Management, Kaohsiung City; Department of Physical Therapy, Shu-Zen Junior College of Medicine and Management, Kaohsiung City; School of Medicine, National Yang-Ming University, Taipei City, Taiwan, Republic of China.
| | - Wei-Chun Huang
- Cardiovascular Medical Center, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China
| | - Chin-Chang Cheng
- Cardiovascular Medical Center, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China
| | - Meng-Wei Ke
- Department of Medical Education and Research, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China
| | - Jung-Shun Tsai
- Department of Nursing, Yuh-Ing Junior College of Health Care and Management, Kaohsiung City, Taiwan, Republic of China
| | - Yao-Min Hung
- Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China
| | - Neng-Chyan Huang
- Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China
| | - Mu-Shun Huang
- School of Medicine, National Yang-Ming University, Taipei City, Taiwan, Republic of China.
| | - Shue-Ren Wann
- Department of Emergency Medicine, Kaohsiung Veterans General Hospital, Kaohsiung City, Taiwan, Republic of China.
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Hao R, Su G, Sun X, Kong X, Zhu C, Su G. Adiponectin attenuates lipopolysaccharide-induced cell injury of H9c2 cells by regulating AMPK pathway. Acta Biochim Biophys Sin (Shanghai) 2019; 51:168-177. [PMID: 30668810 DOI: 10.1093/abbs/gmy162] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 11/21/2018] [Indexed: 12/15/2022] Open
Abstract
Adiponectin, an adipokine synthesized and secreted majorly by adipose tissue, is reported to exert cardioprotective properties via anti-inflammation and antiapoptosis. Lipopolysaccharide (LPS) is a common inflammation and apoptosis inducer of cardiomyocytes. However, few studies have reported the roles of adiponectin on LPS-induced inflammation as well as apoptosis of H9c2 cells, and the possible mechanisms of these effects. In the present study, we found that adiponectin significantly relieved LPS-induced cytotoxicity including decreased viability and elevated LDH release, inhibited LPS-triggered inflammation, which is evidenced by increases in release of TNF-α, IL-1β as well as IL-6, and attenuated the enhanced rates of apoptotic cells as well as increased caspase-3 activity caused by LPS in H9c2 cells. In addition, our data demonstrated that adiponectin upregulated AMP-activated protein kinase (AMPK) activation of H9c2 cells with or without LPS administration. Moreover, we found that blocking AMPK pathway by compound c attenuated the protective effects of adiponectin against the cytotoxicity, inflammatory response, and apoptosis of H9c2 cells resulted from LPS. Our observations bring novel insights for understanding the mediatory role of AMPK pathway implicated in the protective effects of adiponectin against LPS-induced cardiotoxicity.
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Affiliation(s)
- Rui Hao
- Department of Cardiovascular Medicine, Jinan Central Hospital Affiliated to Shandong University, Ji’nan, China
- College of Medicine and Life Sciences, Shandong Academy of Medical Sciences, Jinan University, Ji’nan, China
| | - Guoying Su
- Department of Cardiovascular Medicine, Jinan Central Hospital Affiliated to Shandong University, Ji’nan, China
| | - Xiaolin Sun
- College of Medicine and Life Sciences, Shandong Academy of Medical Sciences, Jinan University, Ji’nan, China
- The Fourth People’s Hospital of Ji’nan City, Ji’nan, China
| | - Xiangran Kong
- College of Medicine and Life Sciences, Shandong Academy of Medical Sciences, Jinan University, Ji’nan, China
| | - Cuiying Zhu
- College of Medicine and Life Sciences, Shandong Academy of Medical Sciences, Jinan University, Ji’nan, China
| | - Guohai Su
- Department of Cardiovascular Medicine, Jinan Central Hospital Affiliated to Shandong University, Ji’nan, China
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21
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Skinner CM, Miousse IR, Ewing LE, Sridharan V, Cao M, Lin H, Williams DK, Avula B, Haider S, Chittiboyina AG, Khan IA, ElSohly MA, Boerma M, Gurley BJ, Koturbash I. Impact of obesity on the toxicity of a multi-ingredient dietary supplement, OxyELITE Pro™ (New Formula), using the novel NZO/HILtJ obese mouse model: Physiological and mechanistic assessments. Food Chem Toxicol 2018; 122:21-32. [PMID: 30282009 DOI: 10.1016/j.fct.2018.09.067] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/18/2018] [Accepted: 09/28/2018] [Indexed: 02/07/2023]
Abstract
Herbal dietary supplement (HDS)-induced hepato- and cardiotoxicity is an emerging clinical problem. In this study, we investigated the liver and heart toxicity of HDS OxyELITE-PRO™ New Formula (OEP-NF), a dietary supplement marketed for weight loss and performance enhancement that was recently withdrawn from the market. Using a novel NZO/HlLtJ obese mouse model, we demonstrated that administration of clinically relevant mouse equivalent doses (MED) of OEP-NF produced cardio- and hepatotoxic risks following both short- and long-term administration schedules. Specifically, gavaging female NZO/HlLtJ with up to 2X MED of OEP-NF resulted in 40% mortality within two weeks. Feeding mice with either 1X or 3X MED of OEP-NF for eight weeks, while not exhibiting significant effects on body weights, significantly altered hepatic gene expression, increased the number of apoptotic and mast cells in the heart and affected cardiac function. The degree of toxicity in NZO/HlLtJ mice was higher than that observed previously in non-obese CD-1 and B6C3F1 strains, suggesting that an overweight/obese condition can sensitize mice to OEP-NF. Adverse health effects linked to OEP-NF, together with a number of other hepato- and cardiotoxicity cases associated with HDS ingestion, argue strongly for introduction of quality standards and pre-marketing safety assessments for multi-ingredient HDS.
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Affiliation(s)
- Charles M Skinner
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA; Center for Dietary Supplement Research, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Isabelle R Miousse
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Laura E Ewing
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA; Department of Pharmacology and Toxicology, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Vijayalakshmi Sridharan
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72223, USA.
| | - Maohua Cao
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72223, USA.
| | - Haixia Lin
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - D Keith Williams
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Bharathi Avula
- National Center for Natural Product Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.
| | - Saqlain Haider
- National Center for Natural Product Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.
| | - Amar G Chittiboyina
- National Center for Natural Product Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.
| | - Ikhlas A Khan
- National Center for Natural Product Research, School of Pharmacy, University of Mississippi, University, MS, 38677, USA.
| | - Mahmoud A ElSohly
- ElSohly Laboratories, Inc. (ELI), Phyto Chemical Services, Inc. (PSI), 5 Industrial Park Drive, Oxford, MS 38655, USA.
| | - Marjan Boerma
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72223, USA; Center for Dietary Supplement Research, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Bill J Gurley
- Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, 72223, USA; Center for Dietary Supplement Research, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
| | - Igor Koturbash
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA; Center for Dietary Supplement Research, University of Arkansas for Medical Sciences, Little Rock, AR, 72205, USA.
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22
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Yu X, Wang Y, Yang D, Tang X, Li H, Lv X, Qi R, Hu C, Lu D, Lv B, Wang H. α 2A-adrenergic blockade attenuates septic cardiomyopathy by increasing cardiac norepinephrine concentration and inhibiting cardiac endothelial activation. Sci Rep 2018; 8:5478. [PMID: 29615637 PMCID: PMC5882799 DOI: 10.1038/s41598-018-23304-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 03/06/2018] [Indexed: 02/08/2023] Open
Abstract
Cardiomyopathy is a common complication associated with increased mortality in sepsis, but lacks specific therapy. Here, using genetic and pharmacological approaches, we explored the therapeutic effect of α2A-adrenergic receptor (AR) blockade on septic cardiomyopathy. CLP-induced septic rats were treated with BRL44408 (α2A-AR antagonist), prazosin (α1-AR antagonist) and/or reserpine. CLP-induced cardiomyopathy, indicated by reduced dP/dt and increased cardiac troponin I phosphorylation, was attenuated by BRL44408, this was associated with reduced cardiac TNF-α and endothelial VCAM-1 expression, cardiomyocyte apoptosis and related signal molecule phosphorylation. BRL44408 increased cardiac norepinephrine (NE) concentration in CLP rats. Pretreatment with reserpine that exhausts cardiac NE without affecting the circulating NE concentration or with prazosin partially abolished the cardioprotection of BRL44408 and reversed its inhibitory effects on myocardial TNF-α, apoptosis and related signal molecule phosphorylation, but not on VCAM-1 expression in septic rats. These effects of BRL44408 were confirmed by α2A-AR gene deletion in septic mice. Furthermore, α2-AR agonist not only enhanced LPS-induced TNF-α and VCAM-1 expression in cardiac endothelial cells that express α2A-AR, but also enhanced LPS-induced cardiac dysfunction in isolated rat hearts. Our data indicate that α2A-AR blockade attenuates septic cardiomyopathy by promoting cardiac NE release that activates myocardial α1-AR and suppressing cardiac endothelial activation.
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Affiliation(s)
- Xiaohui Yu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Yuan Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Duomeng Yang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Xiangxu Tang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Hongmei Li
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Xiuxiu Lv
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Renbin Qi
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Chaofeng Hu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Daxiang Lu
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China
| | - Ben Lv
- Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Huadong Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong, China.
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Yang Z, Cheng F, Yan G, Xiong L, Liu H. Propofol protects against endotoxin-induced myocardial injury by inhibiting NF-κB-mediated inflammation. Exp Ther Med 2017; 15:2032-2036. [PMID: 29434801 PMCID: PMC5776645 DOI: 10.3892/etm.2017.5605] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 11/22/2017] [Indexed: 01/09/2023] Open
Abstract
This study investigated whether propofol protects against endotoxin-induced myocardial injury by inhibiting NF-κB-mediated inflammation. Thirty clean male SD rats were randomly divided into a control (n=10), a model (n=10) and a propofol group (n=10). The model and propofol groups were injected with lipopolysaccharide (LPS) via the caudal vein to establish animal models of myocardial injury. At the same time, the control group was injected with normal saline via the caudal vein. At 30 min after the injections, the propofol group was treated with a continuous intravenous infusion of propofol, the control and model groups were injected with normal saline, and the three groups were treated continuously for 4 h. The changes in levels of interleukin-1 (IL-1), interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α) in serum were detected via enzyme-linked immunosorbent assay (ELISA). The mRNA expression level of nuclear factor-κB (NF-κB) in myocardial tissues was detected via quantitative real-time polymerase chain reaction (qRT-PCR). The protein expression levels of NF-κB, Bax and Bcl-2 in atrial muscles in each group were measured via Western blotting. The damage of myocardial tissues was detected via hematoxylin eosin (H&E) staining of tissues. Our results showed that compared with those in control group, the levels of IL-1, IL-6 and TNF-α in serum in the model and propofol groups were significantly higher; however, the levels in the model group, were significantly higher than those in the propofol group (P<0.01). The mRNA and protein expression levels of NF-κB in the propofol group were significantly lower than those in the model group (P<0.01). Likewise, the protein expression levels of Bax were significantly lower, while those of Bcl-2 were significantly increased. H&E staining showed that the myocardial tissues in the model group were damaged significantly, but the damage in the propofol group was significantly less severe. Based on our findings, it seems propofol can indeed protect against endotoxin-induced myocardial injury through its inhibition of the NF-κB-mediated inflammatory pathway.
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Affiliation(s)
- Zhijun Yang
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Feng Cheng
- Department of Clinical Laboratory, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Guosheng Yan
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Lang Xiong
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
| | - Huizhang Liu
- Department of Anesthesiology, Ezhou Central Hospital, Ezhou, Hubei 436000, P.R. China
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Liu W, Yu W, Weng Y, Wang Y, Sheng M. Dexmedetomidine ameliorates the inflammatory immune response in rats with acute kidney damage. Exp Ther Med 2017; 14:3602-3608. [PMID: 29042954 PMCID: PMC5639432 DOI: 10.3892/etm.2017.4954] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2015] [Accepted: 01/26/2017] [Indexed: 12/12/2022] Open
Abstract
It has been demonstrated that dexmedetomidine (Dex) can protect patients with acute kidney injury from experiencing further tissue damage, however its mechanism of action remains unclear. The present study investigated the immune modulatory functions of Dex in rats with acute kidney injury (AKI) induced via injection of lipopolysaccharide into the tail vein. ELISA analysis showed that Dex reduced the levels of inflammatory cytokines in rats with AKI in a dose dependent manner. Furthermore, the regulatory effects of Dex on cytokine production disappeared when the α-2 adrenergic receptor antagonist Yohimbine (YOH) was added. For a detailed investigation on how Dex regulates the immune response in rats with AKI, the impact of Dex on the viability of splenocytes and lymphocytes was determined and it was determined that Dex did not influence splenocyte and lymphocyte viability. In addition, ELISA tests showed that Dex regulated the production of the T-helper (Th) 17 cytokines interleukin (IL)-17 and IL-23, but not the Th1 cytokine tumor necrosis factor α, in splenocytes and lymphocytes. To confirm whether Dex functioned as an α-2-adrenergic receptor in these immune regulations, YOH was administered together with Dex. When Dex and YOH were administered together, the regulatory functions of Dex were reduced, confirming that Dex acted as an agonist on the α-2-adrenergic receptor. Thus the results of the current study may provide novel insights regarding how Dex modulates immune functions in AKI.
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Affiliation(s)
- Weihua Liu
- Department of Anesthesiology, Tianjin First Center Hospital, Nankai, Tianjin 300192, P.R. China
| | - Wenli Yu
- Department of Anesthesiology, Tianjin First Center Hospital, Nankai, Tianjin 300192, P.R. China
| | - Yiqi Weng
- Department of Anesthesiology, Tianjin First Center Hospital, Nankai, Tianjin 300192, P.R. China
| | - Yongwang Wang
- Department of Anesthesiology, Tianjin First Center Hospital, Nankai, Tianjin 300192, P.R. China
| | - Mingwei Sheng
- Department of Anesthesiology, Tianjin First Center Hospital, Nankai, Tianjin 300192, P.R. China
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Fan TT, Feng XY, Yang YZ, Gao F, Liu Q. Downregulation of PI3K-γ in a mouse model of sepsis-induced myocardial dysfunction. Cytokine 2017; 96:208-216. [PMID: 28458167 DOI: 10.1016/j.cyto.2017.04.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 04/17/2017] [Accepted: 04/18/2017] [Indexed: 01/25/2023]
Abstract
A key component during sepsis is the phosphoinositide 3-kinase (PI3K)/protein kinase B (Akt) signaling pathway, of which the PI3K-γ isoform is a major regulator in many inflammatory responses. However, the role of PI3K-γ in the development of sepsis-induced myocardial dysfunction (SIMD) is unknown. In this study, we established a model of SIMD induced by lipopolysaccharide (LPS), subsequently used the selective inhibitor LY294002 and AS605240 to block the effect of PI3K and PI3K-γ, respectively. Cardiac function was evaluated by echocardiography, hearts were obtained for histological and protein expression examinations. ELISA was used to measure the serum levels of tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), cardiac troponin I (cTnI) and heart-type fatty acid binding protein (H-FABP). LPS-treated mice showed an increase to cardiac inflammation, myocardial damage and production of TNF-α, IL-6, NF-κB, cTnI and H-FABP. Administration of AS605240 to LPS-treated mice reduced some patho-physiological characteristics of SIMD and reduced TNF-α, IL-6, cTnI and H-FABP production. However, administration of LY294002 did not improve those same conditions. The results showed that PI3K-γ is likely a crucial element in SIMD by regulating the PI3K/Akt pathway, and become a new marker of myocardial injury. Inhibition of PI3K-γ might be a potential therapeutic target in SIMD.
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Affiliation(s)
- Ting-Ting Fan
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China; Department of Emergency, Chengdu First People's Hospital, Sichuan 610016, PR China
| | - Xuan-Yun Feng
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Yuan-Zheng Yang
- Department of Critical Care Medicine, The Affiliated Hospital of Hainan Medical College, Hainan 571101, PR China
| | - Feng Gao
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China
| | - Qiong Liu
- Department of Emergency, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, PR China.
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Anesthetic Propofol-Induced Gene Expression Changes in Patients Undergoing Coronary Artery Bypass Graft Surgery Based on Dynamical Differential Coexpression Network Analysis. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2016; 2016:7097612. [PMID: 27437027 PMCID: PMC4942588 DOI: 10.1155/2016/7097612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 06/12/2016] [Accepted: 06/15/2016] [Indexed: 02/02/2023]
Abstract
We aimed to determine the influence of anesthetic propofol on gene expression in patients treated by coronary artery bypass graft (CABG) surgery based on differential coexpression network (DCN) and to further reveal the novel mechanisms of the cardioprotective effects of propofol. Firstly, we constructed the DCN for disease condition based on Pearson correlation coefficient (PCC) and weight value. Secondly, the inference of modules was applied to search modules from DCN with same members but varied connectivity. Furthermore, we measured the statistical significance of the modules for selecting differential modules (DMs). Finally, attract method was used for DMs analysis to select key modules. Based on the δ value, 11928 edges and 2956 nodes were chosen to construct DCNs. A total of 29 seed genes were selected. Moreover, by quantifying connectivity changes in shared gene modules across different conditions, 8 DMs with higher connectivity dynamics were identified. Then, we extracted key modules using attract method, there were 8 key modules, and the top 3 modules were module 1, 2, and 3. Furthermore, GCG, PPY, and PON1 were initial seed genes of these 3 key modules, respectively. Accordingly, GCG and PON1 might exert important roles in the cardioprotective effects of propofol during CABG.
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Shimokawa T, Tsutsui H, Miura T, Nishinaka T, Terada T, Takama M, Yoshida S, Tanba T, Tojo A, Yamagata M, Yukimura T. Renoprotective effect of yohimbine on ischaemia/reperfusion-induced acute kidney injury through α2C-adrenoceptors in rats. Eur J Pharmacol 2016; 781:36-44. [DOI: 10.1016/j.ejphar.2016.03.059] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 03/25/2016] [Accepted: 03/30/2016] [Indexed: 11/29/2022]
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BOZDOĞAN Ö, KAYA ST, YAŞAR S, BAŞ EÇ, ÖZARSLAN OT, EKŞİOGLU D, ERİM F. Short-term diabetes decreases ischemia reperfusion-induced arrhythmia: the effect of alpha-2 blocker yohimbine and glibenclamide. Turk J Biol 2016. [DOI: 10.3906/biy-1510-42] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Abstract
Sepsis-induced myocardial dysfunction is a common complication in septic patients and is associated with increased mortality. In the clinical setting, it was once believed that myocardial dysfunction was not a major pathological process in the septic patients, at least in part, due to the unavailability of suitable clinical markers to assess intrinsic myocardial function during sepsis. Although sepsis-induced myocardial dysfunction has been studied in clinical and basic research for more than 30 years, its pathophysiology is not completely understood, and no specific therapies for this disorder exist. The purpose of this review is to summarize our current knowledge of sepsis-induced myocardial dysfunction with a special focus on pathogenesis and clinical characteristics.
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Affiliation(s)
- Xiuxiu Lv
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People’s Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong 510632 China
| | - Huadong Wang
- Department of Pathophysiology, Key Laboratory of State Administration of Traditional Chinese Medicine of the People’s Republic of China, School of Medicine, Jinan University, Guangzhou, Guangdong 510632 China
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De Luca LA, Almeida RL, David RB, de Paula PM, Andrade CAF, Menani JV. Participation of α2 -adrenoceptors in sodium appetite inhibition during sickness behaviour following administration of lipopolysaccharide. J Physiol 2015; 594:1607-16. [PMID: 26036817 DOI: 10.1113/jp270377] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2015] [Accepted: 05/26/2015] [Indexed: 11/08/2022] Open
Abstract
Sickness behaviour, a syndrome characterized by a general reduction in animal activity, is part of the active-phase response to fight infection. Lipopolysaccharide (LPS), an effective endotoxin to model sickness behaviour, reduces thirst and sodium excretion, and increases neurohypophysial secretion. Here we review the effects of LPS on thirst and sodium appetite. Altered renal function and hydromineral fluid intake in response to LPS occur in the context of behavioural reorganization, which manifests itself as part of the syndrome. Recent data show that, in addition to its classical effect on thirst, non-septic doses of LPS injected intraperitoneally produce a preferential inhibition of intracellular thirst versus extracellular thirst. Moreover, LPS also reduced hypertonic NaCl intake in sodium-depleted rats that entered a sodium appetite test. Antagonism of α2 -adrenoceptors abolished the effect of LPS on sodium appetite. LPS and cytokine transduction potentially recruit brain noradrenaline and α2 -adrenoceptors to control sodium appetite and sickness behaviour.
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Affiliation(s)
- Laurival A De Luca
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Roberto L Almeida
- Department of Physiology, ABC Medical School, Santo André, São Paulo, Brazil
| | - Richard B David
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Patricia M de Paula
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - Carina A F Andrade
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
| | - José V Menani
- Department of Physiology and Pathology, School of Dentistry, São Paulo State University - UNESP, Araraquara, São Paulo, Brazil
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Khodir AE, Ghoneim HA, Rahim MA, Suddek GM. Montelukast attenuates lipopolysaccharide-induced cardiac injury in rats. Hum Exp Toxicol 2015; 35:388-97. [DOI: 10.1177/0960327115591372] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
This study investigates the possible protective effects of montelukast (MNT) against lipopolysaccharide (LPS)-induced cardiac injury, in comparison to dexamethasone (DEX), a standard anti-inflammatory. Male Sprague Dawley rats (160–180 g) were assigned to five groups ( n = 8/group): (1) control; (2) LPS (10 mg/kg, intraperitoneal (i.p.)); (3) LPS + MNT (10 mg/kg, per os (p.o.)); (4) LPS + MNT (20 mg/kg, p.o.); and (5) LPS + DEX (1 mg/kg, i.p.). Twenty-four hours after LPS injection, heart/body weight (BW) ratio and percent survival of rats were determined. Serum total protein, creatine kinase muscle/brain (CK-MB), alkaline phosphatase (ALP), and lactate dehydrogenase (LDH) activities were measured. Heart samples were taken for histological assessment and for determination of malondialdehyde (MDA) and glutathione (GSH) contents. Cardiac tumor necrosis factor α (TNF-α) expression was evaluated immunohistochemically. LPS significantly increased heart/BW ratio, serum CK-MB, ALP, and LDH activities and decreased percent survival and serum total protein levels. MDA content increased in heart tissues with a concomitant reduction in GSH content. Immunohistochemical staining of heart specimens from LPS-treated rats revealed high expression of TNF-α. MNT significantly reduced percent mortality and suppressed the release of inflammatory and oxidative stress markers when compared with LPS group. Additionally, MNT effectively preserved tissue morphology as evidenced by histological evaluation. MNT (20 mg/kg) was more effective in alleviating LPS-induced heart injury when compared with both MNT (10 mg/kg) and DEX (1 mg/kg), as evidenced by decrease in positive staining by TNF-α immunohistochemically, decrease MDA, and increase GSH content in heart tissue. This study demonstrates that MNT might have cardioprotective effects against the inflammatory process during endotoxemia. This effect can be attributed to its antioxidant and/or anti-inflammatory properties.
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Affiliation(s)
- AE Khodir
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Delta University, Mansoura, Egypt
| | - HA Ghoneim
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - MA Rahim
- Urology and Nephrology Center, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - GM Suddek
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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Wang Y, Wang Y, Yang D, Yu X, Li H, Lv X, Lu D, Wang H. β₁-adrenoceptor stimulation promotes LPS-induced cardiomyocyte apoptosis through activating PKA and enhancing CaMKII and IκBα phosphorylation. Crit Care 2015; 19:76. [PMID: 25887954 PMCID: PMC4383083 DOI: 10.1186/s13054-015-0820-1] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 02/18/2015] [Indexed: 02/08/2023] Open
Abstract
INTRODUCTION Caspase activation and cardiomyocyte apoptosis have been implicated in lipopolysaccharide (LPS)-induced cardiac contractile dysfunction. We have recently demonstrated that β1-adrenoceptor (AR) activation by endogenous norepinephrine contributes to cardiomyocyte apoptosis in endotoxemic mice. Here, we further investigated the molecular mechanisms for the enhancing effect of β₁-AR activation on LPS-induced cardiomyocyte apoptosis. METHODS The adult mouse ventricular myocytes were exposed to LPS, dobutamine, protein kinase A (PKA) inhibitor or/and nifedipine, an L-type Ca(2+) channel blocker. Male BALB/c mice were treated with LPS or/ and β₁-AR antagonist, atenolol. Cardiomyocyte apoptosis was determined by terminal deoxynucleotidyl transferase-mediated dUTP nick-end-labeling (TUNEL) assay and apoptosis-associated molecules were detected. RESULTS LPS induced apoptosis in adult mouse ventricular myocytes, dobutamine (DOB), a β₁-AR agonist, promoted apoptosis, caspase-8, 9 and 3 activation and increased cytosolic Ca(2+) concentration in LPS-challenged cardiomyocytes. DOB also up-regulated TNF-α expression, decreased Bcl-2 levels, promoted Bax translocation to mitochondria, mitochondrial membrane potential loss and cytochrome c release as well as IκBα, p38 MAPK, JNK and Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) phosphorylation in LPS-treated cardiomyocytes. PKA inhibitor abolished the effects of DOB on caspase-9 activation, Bcl-2 levels as well as JNK and p38 MAPK phosphorylation, but not on IκBα phosphorylation, TNF-α expression and caspase-8 activation in LPS-stimulated cardiomyocytes. Pretreatment with nifedipine not only significantly blocked the enhancing effects of DOB on LPS-induced elevation in cytosolic Ca(2+) concentration and CaMKII phosphorylation in cardiomyocytes, but also partly reversed the effects of DOB on caspase-9 and caspase-3/7 activities in LPS-treated cardiomyocytes. Furthermore, atenolol suppressed TNF-α expression, JNK, p38 MAPK and CaMKII phosphorylation, increased Bcl-2 expression, and inhibited cytochrome c release and cardiomyocyte apoptosis in the myocardium of endotoxemic mice. CONCLUSIONS β1-AR activation promotes LPS-induced apoptosis through activating PKA, increasing CaMKII phosphorylation as well as enhancing IκBα phosphorylation and TNF-α expression in cardiomyocytes.
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Affiliation(s)
- Yiyang Wang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Yuan Wang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Duomeng Yang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Xiaohui Yu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Hongmei Li
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
- Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Xiuxiu Lv
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
- Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Daxiang Lu
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
- Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
| | - Huadong Wang
- Department of Pathophysiology, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
- Key Laboratory of State Administration of Traditional Chinese Medicine of the People's Republic of China, School of Medicine, Jinan University, Guangzhou, 510632, Guangdong, China.
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Tan F, Chen Y, Yuan D, Gong C, Li X, Zhou S. Dexmedetomidine protects against acute kidney injury through downregulating inflammatory reactions in endotoxemia rats. Biomed Rep 2015; 3:365-370. [PMID: 26137237 DOI: 10.3892/br.2015.427] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 02/06/2015] [Indexed: 12/29/2022] Open
Abstract
Approximately 42% of patients with sepsis undergo acute kidney injury (AKI), which evidently influences patient survival. However, effective therapy strategies are lacking, thus, the present study investigated the protective effects of dexmedetomidine (DEX), a highly selective α-2 adrenoceptor agonist, in rat sepsis models. Rat sepsis models were generated through lipopolysaccharide injection (LPS; 5 mg/kg) in the tail vein. Rats were pretreated with DEX (10 µg/kg) 10 min before LPS injection to observe its protective effects. Of note, a unique α-2-adrenergic receptor antagonist, yohimbine (YOH; 1 mg/kg, intraperitoneally), was also used to antagonize the protective effects of DEX 30 min before DEX exposure. Thirty-two male Sprague Dawley rats were randomly divided into the Sham, LPS, DEX + LPS and YOH + DEX + LPS groups (n=8/group). All the rats were sacrificed 4 h later to observe the pathological changes of renal tissue, including plasma creatinine (Cr), blood urea nitrogen (BUN), kidney injury molecule-1 (KIM-1) and high mobility group protein 1 (HMGB-1) expression. Interleukin 6 (IL-6), IL-18 and tumor necrosis factor α (TNF-α) were all determined to examine the mechanisms of LPS-induced AKI relative to inflammatory reaction. The results indicated that AKI induced by LPS was serious. Renal pathological injury, plasma Cr, BUN, IL-6, IL-18 and TNF-α were all evidently increased in varying degrees. KIM-1 and HMGB-1 expression was upregulated in the LPS group (P<0.05 vs. Sham group). However, when rats were pretreated with DEX, AKI induced by LPS was decreased significantly. Renal pathological injury, plasma Cr, BUN, IL-6, IL-18, TNF-α, and KIM-1 and HMGB-1 expression were all reduced (P<0.05 vs. LPS group). In addition, exposure of the α-2-adrenergic receptor antagonist, YOH, eliminated this reduction. In conclusion, DEX protected against sepsis-induced AKI through depressing the inflammatory reaction, mechanisms of which may be associated with α-2 receptors inhibition.
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Affiliation(s)
- Fang Tan
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Yujie Chen
- Department of Intensive Care Unit, Guangzhou Development District Hospital, Guangzhou, Guangdong 510730, P.R. China
| | - Dongdong Yuan
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Culian Gong
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Xiaoyun Li
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
| | - Shaoli Zhou
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510630, P.R. China
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Extending in silico mechanism-of-action analysis by annotating targets with pathways: application to cellular cytotoxicity readouts. Future Med Chem 2014; 6:2029-56. [DOI: 10.4155/fmc.14.137] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Background: An in silico mechanism-of-action analysis protocol was developed, comprising molecule bioactivity profiling, annotation of predicted targets with pathways and calculation of enrichment factors to highlight targets and pathways more likely to be implicated in the studied phenotype. Results: The method was applied to a cytotoxicity phenotypic endpoint, with enriched targets/pathways found to be statistically significant when compared with 100 random datasets. Application on a smaller apoptotic set (10 molecules) did not allowed to obtain statistically relevant results, suggesting that the protocol requires modification such as analysis of the most frequently predicted targets/annotated pathways. Conclusion: Pathway annotations improved the mechanism-of-action information gained by target prediction alone, allowing a better interpretation of the predictions and providing better mapping of targets onto pathways.
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Li X, Jiang L, Lin S, He Y, Shen G, Cai Z, Ling M, Ni J, Zhang H, Zhang M. Inhibition of mTORC1 renders cardiac protection against lipopolysaccharide. INTERNATIONAL JOURNAL OF CLINICAL AND EXPERIMENTAL PATHOLOGY 2014; 7:8432-8442. [PMID: 25674207 PMCID: PMC4313975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 11/26/2014] [Indexed: 06/04/2023]
Abstract
Sepsis-induced cardiac dysfunction is a severe clinical problem. It is evident that rapamycin can protect heart from pathological injuries. However, there are no data demonstrating rapamycin reverse cardiac dysfunction induced by sepsis. In this study, Lipopolysaccharide (LPS) was administrated to mice and H9c2 cells. After treatment, we further determined cardiac function by echocardiography, ANP, BNP and inflammatory markers by qPCR and apoptosis by TUNEL staining. Moreover, mTORC1 signaling pathway and Akt activity were measured by Western blots. We found that rapamycin attenuated cardiac dysfunction, increase in ANP and BNP as well as apoptosis induced by LPS both in mice and in H9c2 cells. Unexpectedly, LPS did not significantly affect the mRNA levels of TNF-α and IL-6. Furthermore, rapamycin further reduced the decrease in mTORC1 signaling and Akt activity induced by LPS. In conclusion, rapamycin can protect heart from LPS induced damages by inhibition mTORC1 signaling and elevation of Akt activity.
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Affiliation(s)
- Xiang Li
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
- Department of Pathology, Gansu Provincial HospitalLanzhou 730000, Gansu, People’s Republic of China
| | - Lijing Jiang
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Shenghui Lin
- Department of Cardiology, Jinjiang Hospital of Quanzhou Medical CollegeJinjiang 362200, Fujian, People’s Republic of China
| | - Yunfen He
- Minhang District Maternal and Child Health Hospital of ShanghaiMinhang, Shanghai 201199, People’s Republic of China
| | - Guofeng Shen
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Zhenlin Cai
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Meirong Ling
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Jindi Ni
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Hao Zhang
- Department of ICU, Minhang Hospital, Fudan UniversityMinhang, Shanghai 201199, People’s Republic of China
| | - Min Zhang
- Department of Pathology, Gansu Provincial HospitalLanzhou 730000, Gansu, People’s Republic of China
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Wang Y, Li C, Liu Z, Shi T, Wang Q, Li D, Wu Y, Han J, Guo S, Tang B, Wang W. DanQi Pill protects against heart failure through the arachidonic acid metabolism pathway by attenuating different cyclooxygenases and leukotrienes B4. Altern Ther Health Med 2014; 14:67. [PMID: 24555740 PMCID: PMC3933388 DOI: 10.1186/1472-6882-14-67] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 02/18/2014] [Indexed: 01/21/2023]
Abstract
Background Chinese herbal formulae are composed of complex components and produce comprehensive pharmacological effects. Unlike chemical drugs that have only one clear single target, the components of Chinese herbal formulae have multiple channels and targets. How to discover the pharmacological targets of Chinese herbal formulae and their underlying molecular mechanism are still under investigation. Methods DanQi pill (DQP), which is one of the widely prescribed traditional Chinese medicines, is applied as an example drug. In this study, we used the drug target prediction model (DrugCIPHER-CS) to examine the underlying molecular mechanism of DQP, followed by experimental validation. Results A novel therapeutic effect pattern of DQP was identified. After determining the compounds in DQP, we used DrugCIPHER-CS to predict their potential targets. These potential targets were significantly enriched in well-known cardiovascular disease-related pathways. For example, the biological processes of neuroactive ligand–receptor interaction, calcium-signaling pathway, and aminoacyl–tRNA biosynthesis were involved. A new and significant pathway, arachidonic acid (AA) metabolism, was also identified in this study. This predicted pathway alteration was validated with an animal model of heart failure (HF). Results show that DQP had effect both on thromboxane B2 (TXB2) and Prostaglandin I2 (PGI2) in different patterns. It can down-regulate the TXB2 and up-regulate the PGI2 in diverse way. Remarkably, it also had effect on cyclooxygenase (COX)-1 and COX2 by suppressing their levels, which may be the critical and novel mechanism of cardiacprotective efficacy for DQP. Furthermore, leukotrienes B4 (LTB4) receptor, another key molecule of AA metabolism which finally mediated gastrotoxic leukotrienes, was also reduced by DQP. Conclusions The combination of drug target prediction and experimental validation provides new insights into the complicated mechanism of DQP.
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