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Zhong S, Sun Q, Wen J, Zhang Z, Chen Y, Ye H, Huang W, Zheng J, Liu H, Fan X, Jin J, Lyu Z, Li B, Ma D, Liao X. Dexmedetomidine attenuates inflammatory response and chronic pain following video-assisted thoracoscopic surgery for lung cancer. Surgery 2024:S0039-6060(24)00379-9. [PMID: 38997865 DOI: 10.1016/j.surg.2024.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 05/18/2024] [Accepted: 06/02/2024] [Indexed: 07/14/2024]
Abstract
BACKGROUND The objective of the present study was to evaluate the effect of dexmedetomidine administration during video-assisted thoracoscopic surgery for lung cancer on perioperative inflammatory response and chronic post-surgical pain. METHODS A cohort of 152 patients with lung cancer scheduled for elective video-assisted thoracoscopic surgery participated in this randomized controlled trial. Patients were randomly divided into 2 groups and administered an equivalent volume of dexmedetomidine (n = 63) or normal saline (n = 63). Dexmedetomidine was administered at a dose of 0.6 μg/kg 10 minutes before anesthesia induction and maintained at 0.5 μg/kg/h until 0.5 hours before surgery completed. Anesthesia and postoperative pain management protocols were standardized for both groups. The analysis included vital signs, numerical rating scales of pain, blood inflammatory and oxidative stress biomarkers, pain type and location, patient-controlled intravenous analgesia usage, consumption of general anesthetics and pain rescue medications, as well as complications. RESULTS The administration of dexmedetomidine resulted in decreased levels of inflammatory cytokines (interleukin-1 beta, interleukin-6, alongside tumor necrosis factor-alpha) and oxidative stress biomarkers (reactive oxygen species alongside malondialdehyde) but elevated levels of interleukin-10 and superoxide dismutase. In addition, the dexmedetomidine group showed lower postoperative numerical rating scale scores, reduced consumption of anesthetics, faster chest-tube removal, fewer patient-controlled intravenous analgesia presses, and shorter postoperative hospital stays. CONCLUSION The administration of dexmedetomidine effectively attenuated surgical inflammation, oxidative stress, and postoperative pain, thereby promoting patient recovery after lung cancer surgery without increasing the risk of adverse effects or complications.
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Affiliation(s)
- Shi Zhong
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China
| | - Qizhe Sun
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK
| | - Junlin Wen
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China
| | - Zhigang Zhang
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China
| | - Yong Chen
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China
| | - Hongyu Ye
- Department of Cardiothoracic Surgery, Zhongshan City People's Hospital, Guangdong, China
| | - Weizhao Huang
- Department of Cardiothoracic Surgery, Zhongshan City People's Hospital, Guangdong, China
| | - Jiewei Zheng
- Department of Anaesthesiology, Guangdong Medical University, Guangdong, China
| | - Hao Liu
- Department of Anaesthesiology, Shenzhen University, Guangdong, China
| | - Xiaolan Fan
- Department of Anaesthesiology, Shenzhen University, Guangdong, China
| | - Jian Jin
- Department of Anaesthesiology, Guangdong Medical University, Guangdong, China
| | - Zhu Lyu
- Department of Anaesthesiology, Guangdong Medical University, Guangdong, China
| | - Binfei Li
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China
| | - Daqing Ma
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea & Westminster Hospital, London, UK; Department of Anaesthesiology, Perioperative and Systems Medicine Laboratory, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, P.R. China.
| | - Xiaozu Liao
- Department of Anaesthesiology, Zhongshan City People's Hospital, Guangdong, China.
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Feng L, Dai S, Zhang C, Zhang W, Zhu W, Wang C, He Y, Song W. Ripa-56 protects retinal ganglion cells in glutamate-induced retinal excitotoxic model of glaucoma. Sci Rep 2024; 14:3834. [PMID: 38360971 PMCID: PMC10869350 DOI: 10.1038/s41598-024-54075-z] [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: 08/17/2023] [Accepted: 02/08/2024] [Indexed: 02/17/2024] Open
Abstract
Glaucoma is a prevalent cause of blindness globally, characterized by the progressive degeneration of retinal ganglion cells (RGCs). Among various factors, glutamate excitotoxicity stands out as a significant contributor of RGCs loss in glaucoma. Our study focused on Ripa-56 and its protective effect against NMDA-induced retinal damage in mice, aiming to delve into the potential underlying mechanism. The R28 cells were categorized into four groups: glutamate (Glu), Glu + Ripa-56, Ripa-56 and Control group. After 24 h of treatment, cell death was assessed by PI / Hoechst staining. Mitochondrial membrane potential changes, apoptosis and reactive oxygen species (ROS) production were analyzed using flow cytometry. The alterations in the expression of RIP-1, p-MLKL, Bcl-2, BAX, Caspase-3, Gpx4 and SLC7A11 were examined using western blot analysis. C57BL/6j mice were randomly divided into NMDA, NMDA + Ripa-56, Ripa-56 and control groups. Histological changes in the retina were evaluated using hematoxylin and eosin (H&E) staining. RGCs survival and the protein expression changes of RIP-1, Caspase-3, Bcl-2, Gpx4 and SLC7A11 were observed using immunofluorescence. Ripa-56 exhibited a significant reduction in the levels of RIP-1, p-MLKL, Caspase-3, and BAX induced by glutamate, while promoting the expression of Bcl-2, Gpx-4, and SLC7A1 in the Ripa-56-treated group. In our study, using an NMDA-induced normal tension glaucoma mice model, we employed immunofluorescence and H&E staining to observe that Ripa-56 treatment effectively ameliorated retinal ganglion cell loss, mitigating the decrease in retinal ganglion cell layer and bipolar cell layer thickness caused by NMDA. In this study, we have observed that Ripa-56 possesses remarkable anti- necroptotic, anti-apoptotic and anti-ferroptosis properties. It demonstrates the ability to combat not only glutamate-induced excitotoxicity in R28 cells, but also NMDA-induced retinal excitotoxicity in mice. Therefore, Ripa-56 could be used as a potential retinal protective agent.
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Affiliation(s)
- Lemeng Feng
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Shirui Dai
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
- Hunan Clinical Research Center of Ophthalmic Disease, Changsha, Hunan, 410011, People's Republic of China
| | - Cheng Zhang
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Wulong Zhang
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Weiming Zhu
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Chao Wang
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Ye He
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China
- Eye Center of Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China
- Hunan Key Laboratory of Ophthalmology, Changsha, Hunan, 410008, People's Republic of China
| | - Weitao Song
- National Clinical Research Center for Geriatric Diseases, Xiangya Hospital of Central South University, No. 87 Xiangya Road, Changsha, Hunan, 410008, People's Republic of China.
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Lu K, Li X, Wu J. Sirtuin 3 is required for the dexmedetomidine-mediated alleviation of inflammation and oxidative stress in nephritis. Immun Inflamm Dis 2024; 12:e1135. [PMID: 38270316 PMCID: PMC10777884 DOI: 10.1002/iid3.1135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 11/23/2023] [Accepted: 12/17/2023] [Indexed: 01/26/2024] Open
Abstract
INTRODUCTION Although sirtuin 3 (SIRT3) is known to be involved in dexmedetomidine (DEX)-mediated alleviation of renal ischemia and reperfusion injury, the influence of the association between DEX and SIRT3 on nephritis development remains unclear. In this study, the role of SIRT3 in DEX-mediated amelioration of inflammation and oxidative stress in nephritis as well as the possible underlying mechanism were explored in vivo and in vitro. METHODS An animal model of glomerulonephritis was generated by injecting mice with interferon-alpha (IFNα)-expressing adenoviruses, and periodic acid-Schiff staining was then used to reveal pathogenicity-related changes in the renal tissue. Additionally, human embryonic kidney cells (HEK293) and renal mesangial cells (RMCs) were treated with IFNα to establish cell models of inflammation in vitro. RESULTS DEX administration alleviated glomerulonephritis in the animal model and upregulated SIRT3 expression in the renal tissue. SIRT3 knockdown inhibited the renoprotective effects of DEX against nephritis. IFNα induced inflammation, oxidative stress, and apoptosis in the RMCs and HEK293 cells and reduced their growth, as evidenced by the evaluation of cytokine levels (enzyme-linked immunosorbent assay), reactive oxygen species generation, catalase and superoxide dismutase activities, nuclear factor-erythroid factor 2-related factor 2/heme oxygenase-1 signal transduction, apoptotic cell proportion, and cell viability. In addition to promoting SIRT3 expression, DEX inhibited IFNα-induced inflammation, oxidative stress, and apoptosis in these cells and promoted their viability. SIRT3 knockdown partially reversed the beneficial effects of DEX on RMCs and HEK293 cells. CONCLUSIONS Our results suggest that DEX exhibits renoprotective activity during nephritis progression, protecting renal cells against inflammatory injury by promoting SIRT3 expression.
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Affiliation(s)
- Kai Lu
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Xinlong Li
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of MedicineZhejiang UniversityHangzhouChina
| | - Jie Wu
- Department of Anesthesiology, Sir Run Run Shaw Hospital, School of MedicineZhejiang UniversityHangzhouChina
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Heil LBB, Braga CL, Magalhães RF, Antunes MA, Cruz FF, Samary CS, Battaglini D, Robba C, Pelosi P, Silva PL, Rocco PRM. Dexmedetomidine compared to low-dose ketamine better protected not only the brain but also the lungs in acute ischemic stroke. Int Immunopharmacol 2023; 124:111004. [PMID: 37778171 DOI: 10.1016/j.intimp.2023.111004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 09/07/2023] [Accepted: 09/25/2023] [Indexed: 10/03/2023]
Abstract
BACKGROUND Dexmedetomidine (DEX) and low-dose ketamine (KET) present neuroprotective effects in acute ischemic stroke (AIS); however, to date, no studies have evaluated which has better protective effects not only on the brain but also lungs in AIS. METHODS AIS-induced Wistar rats (390 ± 30 g) were randomized after 24-h, receiving dexmedetomidine (STROKE-DEX, n = 10) or low-dose S(+)-ketamine (STROKE-KET, n = 10). After 1-h protective ventilation, perilesional brain tissue and lungs were removed for histologic and molecular biology analysis. STROKE animals (n = 5), receiving sodium thiopental but not ventilated, had brain and lungs removed for molecular biology analysis. Effects of DEX and KET mean plasma concentrations on alveolar macrophages, neutrophils, and lung endothelial cells, extracted primarily 24-h after AIS, were evaluated. RESULTS In perilesional brain tissue, apoptosis did not differ between groups. In STROKE-DEX, compared to STROKE-KET, tumor necrosis factor (TNF)-α and vascular cell adhesion molecule-1 (VCAM-1) expressions were reduced, but no changes in nuclear factor erythroid 2-related factor-2 (Nrf2) and super oxide dismutase (SOD)-1 were observed. In lungs, TNF-α and VCAM-1 were reduced, whereas Nrf2 and SOD-1 were increased in STROKE-DEX. In alveolar macrophages, TNF-α and inducible nitric oxide synthase (M1 macrophage phenotype) were lower and arginase and transforming growth factor-β (M2 macrophage phenotype) higher in STROKE-DEX. In lung neutrophils, CXC chemokine receptors (CXCR2 and CXCR4) were higher in STROKE-DEX. In lung endothelial cells, E-selectin and VCAM-1 were lower in STROKE-DEX. CONCLUSIONS In the current AIS model, dexmedetomidine compared to low-dose ketamine reduced inflammation and endothelial cell damage in both brain and lung, suggesting greater protection.
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Affiliation(s)
- Luciana B B Heil
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Cassia L Braga
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Raquel F Magalhães
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mariana A Antunes
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda F Cruz
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Rio de Janeiro Network on Neuroinflammation, Rio de Janeiro State Research Foundation (FAPERJ), Rio de Janeiro, Brazil
| | - Cynthia S Samary
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Rio de Janeiro Network on Neuroinflammation, Rio de Janeiro State Research Foundation (FAPERJ), Rio de Janeiro, Brazil; Department of Cardiorespiratory and Musculoskeletal Physiotherapy, Faculty of Physiotherapy, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Chiara Robba
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy; Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Paolo Pelosi
- IRCCS Ospedale Policlinico San Martino, Genoa, Italy; Department of Surgical Sciences and Integrated Diagnostics (DISC), University of Genoa, Genoa, Italy
| | - Pedro L Silva
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Rio de Janeiro Network on Neuroinflammation, Rio de Janeiro State Research Foundation (FAPERJ), Rio de Janeiro, Brazil
| | - Patricia R M Rocco
- Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil; Rio de Janeiro Network on Neuroinflammation, Rio de Janeiro State Research Foundation (FAPERJ), Rio de Janeiro, Brazil.
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Park YH, Park HP, Kim E, Lee H, Hwang JW, Jeon YT, Lim YJ. The antioxidant effect of preischemic dexmedetomidine in a rat model: increased expression of Nrf2/HO-1 via the PKC pathway. BRAZILIAN JOURNAL OF ANESTHESIOLOGY (ELSEVIER) 2023; 73:177-185. [PMID: 34560114 PMCID: PMC10068566 DOI: 10.1016/j.bjane.2021.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Revised: 08/03/2021] [Accepted: 08/21/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND The precise underlying mechanism of antioxidant effects of dexmedetomidine-induced neuroprotection against cerebral ischemia has not yet been fully elucidated. Activation of Nuclear factor erythroid 2-related factor (Nrf2) and Heme Oxygenase-1 (HO-1) represents a major antioxidant-defense mechanism. Therefore, we determined whether dexmedetomidine increases Nrf2/HO-1 expression after global transient cerebral ischemia and assessed the involvement of Protein Kinase C (PKC) in the dexmedetomidine-related antioxidant mechanism. METHODS Thirty-eight rats were randomly assigned to five groups: sham (n...=...6), ischemic (n...=...8), chelerythrine (a PKC inhibitor; 5...mg.kg-1 IV administered 30...min before cerebral ischemia) (n...=...8), dexmedetomidine (100.....g.kg-1 IP administered 30...min before cerebral ischemia (n...=...8), and dexmedetomidine...+...chelerythrine (n...=...8). Global transient cerebral ischemia (10...min) was applied in all groups, except the sham group; histopathologic changes and levels of nuclear Nrf2 and cytoplasmic HO-1 were examined 24...hours after ischemia insult. RESULTS We found fewer necrotic and apoptotic cells in the dexmedetomidine group relative to the ischemic group (p...<...0.01) and significantly higher Nrf2 and HO-1 levels in the dexmedetomidine group than in the ischemic group (p...<...0.01). Additionally, chelerythrine co-administration with dexmedetomidine attenuated the dexmedetomidine-induced increases in Nrf2 and HO-1 levels (p...<...0.05 and p...<...0.01, respectively) and diminished its beneficial neuroprotective effects. CONCLUSION Preischemic dexmedetomidine administration elicited neuroprotection against global transient cerebral ischemia in rats by increasing Nrf2/HO-1 expression partly via PKC signaling, suggesting that this is the antioxidant mechanism underlying dexmedetomidine-mediated neuroprotection.
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Affiliation(s)
- Yong-Hee Park
- Chung-Ang University College of Medicine, Chung-Ang University Hospital, Department of Anesthesiology and Pain Medicine, Seoul, South Korea
| | - Hee-Pyoung Park
- Seoul National University College of Medicine, Seoul National University Hospital, Department of Anesthesiology and Pain Medicine, Seoul, South Korea
| | - Eugene Kim
- Hanyang University Medical Center, College of Medicine, Hanyang University, Department of Anesthesiology and Pain Medicine, Seoul, South Korea
| | - Hannah Lee
- Seoul National University College of Medicine, Seoul National University Hospital, Department of Anesthesiology and Pain Medicine, Seoul, South Korea
| | - Jung-Won Hwang
- Seoul National University College of Medicine, Seoul National University Bundang Hospital, Department of Anesthesiology and Pain Medicine, Seongnam, South Korea
| | - Young-Tae Jeon
- Seoul National University College of Medicine, Seoul National University Bundang Hospital, Department of Anesthesiology and Pain Medicine, Seongnam, South Korea
| | - Young-Jin Lim
- Seoul National University College of Medicine, Seoul National University Hospital, Department of Anesthesiology and Pain Medicine, Seoul, South Korea.
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Zhu L, Gao H, Huang S, Cao T, Zhai X, Hu J, Wang T, Dong J, Liu Z, Chen J, Liu J, Zhang Z, Zhou Q. Combination of STING agonist and CXCR3 antagonist disrupts immune tolerance to overcome anti-PD-L1 resistance in lung adenocarcinoma under oxidative stress. Gene 2023; 851:146962. [DOI: 10.1016/j.gene.2022.146962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 09/12/2022] [Accepted: 10/05/2022] [Indexed: 11/27/2022]
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Aroosa S, Sattar A, Javeed A, Usman M, Hafeez MA, Ahmad M. Protective Effects of Dexmedetomidine Infusion on Genotoxic Potential of Isoflurane in Patients Undergoing Emergency Surgery. Int J Clin Pract 2023; 2023:7414655. [PMID: 36874382 PMCID: PMC9977554 DOI: 10.1155/2023/7414655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Revised: 12/13/2022] [Accepted: 01/23/2023] [Indexed: 02/24/2023] Open
Abstract
BACKGROUND Isoflurane (ISO) has been extensively uses in general anesthesia and reported to cause deoxyribonucleic acid (DNA) damage in prolonged surgical procedures. Dexmedetomidine (DEX) is an adrenergic agonist and having antioxidant activity that may reduce the genotoxic potential (DNA damage) and oxidative stress induced by ISO in patients undergoing major neurosurgical procedures. Methods and Findings. Twenty-four patients of ASA (American Society of Anesthesiologists) classes I and II were randomly divided into two groups (n = 12). Group A patients received ISO, while group B patients received DEX infusion for maintenance of anesthesia. Venous blood samples were collected at different time intervals and used to evaluate the oxidative stress marker malondialdehyde (MDA) and endogenous antioxidants superoxide dismutases (SOD) and catalases (CAT). A single-cell gel electrophoresis (SCGE)-comet assay was used to investigate the genotoxic potential of ISO. CONCLUSION Increased level of antioxidants and decreased value of MDA and genetic damage index were seen in group B (P < 0.001) in a time-dependent manner. Genetic damage was highest at point T 2 (0.77 vs. 1.37), and continued to decrease till T 3 (0.42 vs. 1.19), with respect to negative controls or baseline values following DEX infusion. Significantly, higher level of MDA was recorded in serum of group A (P < 0.001) as compared to group B (1.60 ± 0.33 vs. 0.03 ± 0.001). Enzymatic activities of CAT and SOD were significantly higher in group B than group A (10.11 ± 2.18 vs. 5.71 ± 0.33), (1.04 ± 0.05 vs. 0.95 ± 0.01), respectively. It may play a contributing role in daily anesthesia practice and improve the toxic effects on patients as well as anesthesia personnel. Trial Registration. Ethical Committee of Post Graduate Medical Institute (PGMI), Lahore General Hospital approved the use of humans in this study vide human subject application number ANS-6466 dated February 04, 2019. Furthermore, as the clinical trials required registration from an appropriate registry approved by World Health Organization (WHO), this trail also retrospectively registered at Thai Clinical Trials Registry (an approved WHO registry for clinical trials registration) under reference ID TCTR20211230001 on December 30, 2021.
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Affiliation(s)
- Sadaf Aroosa
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Adeel Sattar
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Aqeel Javeed
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Muhammad Usman
- Institute of Pharmaceutical Sciences, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Mian Abdul Hafeez
- Department of Parasitology, Faculty of Veterinary Science, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Mehmood Ahmad
- Department of Pharmacology and Toxicology, University of Veterinary and Animal Sciences, Lahore, Pakistan
- Department of Pharmacology, Riphah International University, Lahore, Pakistan
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Xiao S, Zhou Y, Gao H, Yang D. Dexmedetomidine attenuates airway inflammation and oxidative stress in asthma via the Nrf2 signaling pathway. Mol Med Rep 2022; 27:2. [PMID: 36321783 PMCID: PMC9673067 DOI: 10.3892/mmr.2022.12889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 10/11/2022] [Indexed: 12/03/2022] Open
Abstract
Allergic asthma is a chronic inflammatory disease in which oxidative stress serves a pivotal role. In clinical practice, dexmedetomidine (DEX), an α‑2‑adrenergic receptor agonist, is used as a sedative. DEX exhibits antioxidative and organ‑protective properties. In a murine model of asthma, DEX has a therapeutic effect via the toll like receptor 4/NF‑кB signaling pathway; however, whether DEX can exert an antioxidative effect on asthma has yet to be elucidated. In the present study, a T helper (Th)2‑dominant murine asthma model was established. DEX treatment significantly reduced eosinophilic airway inflammation, mucus overproduction and airway hyperresponsiveness, as well as the concentrations of Th2 cytokines. The lung tissues of mice with asthma were characterized by redox imbalance (increased oxidative stress and impaired antioxidant capacity). DEX treatment alleviated this imbalance by decreasing the levels of malondialdehyde and reactive oxygen species, and increasing the levels of glutathione. Furthermore, the nuclear factor erythroid 2‑related factor 2 (Nrf2) signaling pathway was inhibited in the lung tissues of asthmatic mice; these effects were noted in its downstream genes, heme oxygenase 1 and glutathione peroxidase 4. In mice with asthma, DEX treatment induced the expression of these antioxidant genes and the activation of Nrf2, whereas ML385 (an inhibitor of Nrf2) partially abrogated the antioxidative and therapeutic effects of DEX. To the best of our knowledge, the present study is the first to demonstrate the protective effect of DEX on Th2‑dominant asthma through the activation of the Nrf2 signaling pathway. The results suggested that the antioxidative properties of DEX could be beneficial in clinical application of DEX for the relief of asthmatic symptoms.
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Affiliation(s)
- Shilin Xiao
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, P.R. China
| | - Ying Zhou
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, P.R. China
| | - Huibin Gao
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, P.R. China
| | - Dong Yang
- Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100144, P.R. China,Correspondence to: Professor Dong Yang, Department of Anesthesiology, Plastic Surgery Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 33 Badachu Road, Shijingshan, Beijing 100144, P.R. China, E-mail:
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Anticancer and chemosensitization effects of cannabidiol in 2D and 3D cultures of TNBC: involvement of GADD45α, integrin-α5, -β5, -β1, and autophagy. Drug Deliv Transl Res 2022; 12:2762-2777. [PMID: 35217991 PMCID: PMC9811521 DOI: 10.1007/s13346-022-01137-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/11/2022] [Indexed: 01/07/2023]
Abstract
To date, promising therapy for triple negative breast cancer (TNBC) remains a serious concern clinically because of poor prognosis, resistance, and recurrence. Herein, anti-cancer potential of synthetic cannabidiol (CBD; Purisys, GA; GMP grade) was explored either alone or as a chemosensitizer followed by post-treatment with doxorubicin (DOX) in TNBC (i.e., MDA-MB-231 and MDA-MB-468) cells. In comparison to 2D cultures, CBD showed greater IC50 values in 3D (LDP2 hydrogel based) cultures of MDA-MB-231 (6.26-fold higher) and MDA-MB-468 (10.22-fold higher) cells. Next-generation RNA sequencing revealed GADD45A, GADD45G, FASN, LOX, and integrin (i.e., -α5, -β5) genes to be novelly altered by CBD in MDA-MB-231 cells. CIM-16 plate-based migration assay and western blotting disclosed that CBD induces anti-migratory effects in TNBC cells by decreasing fibronectin, vimentin, and integrins-α5, -β5, and -β1. Western blotting, RT-qPCR, and immunocytochemistry revealed that CBD inhibited autophagy (decreased Beclin1, and ATG-5, -7, and -16) of TNBC cells. CBD pre-treatment increased DOX sensitivity in TNBC cells. CBD pre-treatment accompanied by DOX treatment decreased LOX and integrin-α5, and increased caspase 9 protein respectively in MDA-MB-468 cells.
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Fu Z, Pang Z, He L, Zhang L, Fan Y, Zhao C, Yang J. Dexmedetomidine Confers Protection Against Neuronal Oxygen Glucose Deprivation-Reperfusion by Regulating SIRT3 Mediated Autophagy. Neurochem Res 2022; 47:3490-3505. [PMID: 36042140 DOI: 10.1007/s11064-022-03712-y] [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: 04/29/2021] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 12/01/2022]
Abstract
Dexmedetomidine (Dex) plays protective effects on brain ischemia-reperfusion (I/R) injury, but its mechanism remains unclear. In this study, we aimed to investigate whether Dex protects neurons against I/R injury by activating SIRT3 mediated autophagy. The oxygen glucose deprivation-reperfusion (OGD/R) model was constructed in HT22 cells. Different doses of Dex (50 ng/mL, 100 ng/mL and 500 ng/mL) were treated to observe the changes of autophagy and SIRT3 expression. Further, the mimic of SIRT3 and SIRT3 inhibitor were used to analyze the effects of Dex on the SIRT3 expression in HT22 cells. Additionally, the autophagy inhibitor and AMPK inhibitor were used to analyze the effects of Dex on SIRT3 mediated autophagy. The cells viability, oxidative stress and ATP were observed using assay kits. The mitochondrial membrane potential (MMP) and death were analyzed by flow cytometry. The degree of autophagy was observed by acridine orange staining. Western blotting was used to analyze the expression of autophagy related proteins and AMPK/mTOR pathway related proteins. After Dex treatment, the OGD/R induced cell injury was significantly improved through decreasing the levels of LDH and H2O2, increasing levels of ATP and MMP. Furthermore, Dex increased the degree of autophagy and expression of SIRT3 in OGD/R injured cells. Through overexpression of SIRT3, the OGD/R induced cell injury was also clearly improved. But the SIRT3 inhibitor or autophagy inhibitor covered the roles of Dex. Additionally, AMPK inhibitor played an opposite role compared with the effects of Dex treatment. From this study, the protection mechanism of Dex on neurons I/R injury might related to the activation of SIRT3 mediated autophagy.
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Affiliation(s)
- Zhijie Fu
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China
| | - Zhilu Pang
- Department of Anesthesiology, Pain and Perioperative Medicine, Henan Provincial People's Hospital, Zhengzhou, 450000, China
| | - Long He
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China
| | - Le Zhang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China
| | - Yuning Fan
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China
| | - Can Zhao
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China
| | - Jianjun Yang
- Department of Anesthesiology, Pain and Perioperative Medicine, The First Affiliated Hospital of Zhengzhou University, No. 1, Longhu Central Ring Road, Zhengzhou, 450000, Henan Province, China.
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Neuroprotective Effect of Dexmedetomidine against Postoperative Cognitive Decline via NLRP3 Inflammasome Signaling Pathway. Int J Mol Sci 2022; 23:ijms23158806. [PMID: 35955939 PMCID: PMC9369249 DOI: 10.3390/ijms23158806] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 07/31/2022] [Accepted: 08/05/2022] [Indexed: 12/04/2022] Open
Abstract
Dexmedetomidine (Dex), widely used as a sedative in surgical procedures and intensive care units, induces sympatholytic, anxiolytic, analgesic, and sedative effects. Postoperative cognitive dysfunction (POCD) is routinely observed in postoperative care following surgery and general anesthesia. The NLRP3 inflammasome complex plays a critical role in innate immune response by detecting pathogenic microorganisms and activating pro-inflammatory cytokines. Although there are numerous protective effects of Dex among the neurological diseases, specific mechanisms including NLRP3 inflammasome-mediated neuroinflammation via oxidative stress response in a POCD model are not fully understood. Here, we investigated whether Dex exhibits neurocognitive effects through the NLRP3 inflammasome signaling in a POCD mouse model using a neurobehavioral test and ELISA analysis. We also confirmed the level of oxidative stress-related response in the in vitro system in the POCD model. Furthermore, we evaluated the NLRP3 inflammasome complex by immunoprecipitation analysis. In summary, the results of the present study indicated that Dex showed a neuroprotective effect in the POCD model by reducing oxidative stress response through NLRP3 inflammasome-mediated neuroinflammation.
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Safak G, Celiker M, Tümkaya L, Mercantepe T, Rakici S, Cinar S, Yilmaz A, Terzi S, Demir E, Celebi Erdivanlı O, Ozergin Coşkun Z, Karakaş S, Birinci M, Dursun E. Comparison of effects of dexmedetomidine and amifostine against X-ray radiation-induced parotid damage. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2022; 61:241-253. [PMID: 35147734 DOI: 10.1007/s00411-022-00964-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
Radiotherapy can be employed as a therapeutic modality alone in the early stages of cancer and is used together with other treatments such as surgery and chemotherapy in more advanced stages. However, exposure to ionizing radiation in association with radiotherapy affects several organs in the head and neck and can give rise to early and late side effects. Exposure to ionizing radiation used in radiotherapy is known to cause cell damage by leading to oxygen stress through the production of free oxygen radicals (such as superoxide radicals, hydroxyl radical, hydrogen peroxide, and singlet oxygen), depending on the total radiation dosage, the fractionation rate, radiosensitivity, and linear energy transfer. The purpose of the present study was to determine the potential protective role of a powerful and highly selective α2-adrenoreceptor agonist with a broad pharmacological spectrum against salivary gland damage induced by ionizing radiation exposure. Forty Sprague-Dawley rats were divided into five groups-control, ionizing radiation, ionizing radiation + dexmedetomidine (100 µg/kg), ionizing radiation + dexmedetomidine (200 µg/kg), and ionizing radiation + amifostine (200 mg/kg). Following exposure to ionizing radiation, we observed necrosis, fibrosis, and vascular congestions in parotid gland epithelial cells. We also observed increases in malondialdehyde (MDA) and cleaved Caspase-3 levels and a decrease in glutathione (GSH). In groups receiving dexmedetomidine, we observed necrotic epithelial cells, fibrosis and vascular congestion in parotid gland tissue, a decrease in MDA levels, and an increase in GSH. Dexmedetomidine may be a promising antioxidant agent for the prevention of oxidative damage following radiation exposure.
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Affiliation(s)
- Gökhan Safak
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey.
| | - Metin Celiker
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey
| | - Levent Tümkaya
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Tolga Mercantepe
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Sema Rakici
- Department of Radiation Oncology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Seda Cinar
- Department of Histology and Embryology, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Adnan Yilmaz
- Department of Biochemistry, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Suat Terzi
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey
| | - Emine Demir
- Department of Otolaryngology, Faculty of Medicine, Altınbas University, Rize, 34000, Turkey
| | - Ozlem Celebi Erdivanlı
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey
| | - Zerrin Ozergin Coşkun
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey
| | - Sibel Karakaş
- Department of Biochemistry, Faculty of Medicine, Recep Tayyip Erdogan University, Rize, 53010, Turkey
| | - Mehmet Birinci
- Departments of Otolaryngology, Of State Hospital, Trabzon, 61000, Turkey
| | - Engin Dursun
- Department of Otolaryngology, Faculty of Medicine, Recep Tayyip Erdogan University, İki nolu sehitler caddesi, Rize, 53010, Turkey
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Hu J, Lv B, West R, Chen X, Yan Y, Pac Soo C, Ma D. Comparison between dexmedetomidine and propofol on outcomes after coronary artery bypass graft surgery: a retrospective study. BMC Anesthesiol 2022; 22:51. [PMID: 35183122 PMCID: PMC8857833 DOI: 10.1186/s12871-022-01589-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 01/27/2022] [Indexed: 12/29/2022] Open
Abstract
Background Dexmedetomidine (DEX) has a pharmacological profile that should allow rapid recovery and prevent undesirable outcomes such as pulmonary complications. Methods This large retrospective study compared the beneficial effects of perioperative infusion of DEX with propofol on the postoperative outcome after coronary artery bypass graft surgery. We reviewed patients’ medical notes at Luoyang Central Hospital from 1st January 2012 to 31st December 2019. All continuous variables, if normally distributed, were presented as mean ± SD; Otherwise, the non-normally distributed data and categorical data were presented as median (25-75 IQR) or number (percentage). The Mann-Whitney U test and Chi-square test were used to evaluate the difference of variables between the DEX and propofol groups. Multivariate logistic regression analysis was performed on the main related and differential factors in the perioperative period. Results A total of 1388 patients were included in the study; of those, 557 patients received propofol infusion, and 831 patients received dexmedetomidine. DEX significantly reduced postoperative pulmonary complications compared with propofol, 7.82% vs 13.29%; P < 0.01, respectively. When compared with propofol, DEX significantly shortened the duration of mechanical lung ventilation, 18 (13,25) hours vs 21 (16,37) hours; P < 0.001, the length of stay in the intensive care unit, 51 (42,90) vs 59 (46,94.5) hours; P = 0.001 and hospital stay, 20 (17,24) vs 22 (17,28) days; P < 0.001, respectively. The incidences of postoperative wound dehiscence and infection were significantly reduced with DEX compared with propofol groups, 2.53% vs 6.64%; P < 0.001, respectively. Interestingly, patients receiving DEX had significantly shorter surgical time compared to propofol; 275 (240,310) vs 280 (250,320) minutes respectively (P = 0.005) and less estimated blood loss (P = 0.001). Conclusion Perioperative infusion of dexmedetomidine improved the desirable outcomes in patients who had coronary artery bypass graft surgery compared with propofol.
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Liu Z, Jin Y, Feng C, Liu G, Wang Y, Zhao X, Liu G. Renoprotective Effect of Intraoperative Dexmedetomidine in Renal Transplantation. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:9275406. [PMID: 35211189 PMCID: PMC8863455 DOI: 10.1155/2022/9275406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 01/13/2022] [Accepted: 01/20/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Renal dysfunction after kidney transplantation may be influenced by many reasons. This study was designed to evaluate whether the administration of dexmedetomidine (Dex) could ameliorate renal function and prognosis after kidney transplantation. METHODS A total of 65 patients were divided into Dex group (n = 33) and Con group (Con, n = 32). Dex group intravenously received an initial loading dose of 0.6 μg/kg Dex for 15 min before anaesthesia induction, followed by a rate of 0.4 μg/kg/h until 30 min after kidney reperfusion. By contrast, Con group received saline. The concentration of urinary kidney injury molecule-1 (KIM-1), serum creatinine (Cr), blood urea, urine output, β2 microglobulin (β2-MG), Cystatin C (CysC), and estimated glomerular filtration rate (eGFR) was recorded and compared between two groups during the course of the hospitalization or follow-up. Mean arterial pressure (MAP) and heart rate (HR), vasoactive drugs, and anaesthetics were recorded during the operation. Pain degree was evaluated using a visual analogue scale (VAS) after operation. Delayed graft function (DGF), graft loss, length of hospital stay, and mortality were compared between groups. RESULTS The concentration of KIM-1 in Dex group was lower than Con group at 2 h (P = 0.018), 24 h (P = 0.013), 48 h (P < 0.01), and 72 h (P < 0.01) after reperfusion. MAP of Dex group after tracheal intubation (P = 0.012) and incision (P = 0.018) and HR after intubation (P = 0.021) were lower than that of Con group. The dosage of sufentanil during operation in Dex group was less than Con group (P = 0.039). Patients that used atropine in Dex group were more than Con group (P = 0.027). Patients who received Dex presented with lower VAS scores at 6 h (P = 0.01) and 12 h (P = 0.002) after operation. Concentration of serum Cr and blood urea had no significant differences between groups before operation and on postoperative day 1 to 6. Urine output was recorded for 6 days after operation and had no differences between groups. Also, no differences were identified between two groups in urea, Cr, β2-MG, CysC, and eGFR in the first 3 months after operation. Incidence of DGF after operation was detected no difference between groups, while length of hospital stay in Dex group was less than Con group (P = 0.012). CONCLUSION Dex can decrease kidney injury marker level, attenuate perioperative stress, relieve the dosage of sufentanil and postoperative pain, and reduce length of hospital stay. However, Dex is not associated with changes in prognosis in the first 3 months after transplantation.
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Affiliation(s)
- Zhenzhen Liu
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yanwu Jin
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Chang Feng
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Ge Liu
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Yinghui Wang
- Department of Nephrology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Xin Zhao
- Department of Anesthesiology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
| | - Gang Liu
- Department of Nephrology, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
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Li Y, Wu B, Hu C, Hu J, Lian Q, Li J, Ma D. The role of the vagus nerve on dexmedetomidine promoting survival and lung protection in a sepsis model in rats. Eur J Pharmacol 2022; 914:174668. [PMID: 34863997 DOI: 10.1016/j.ejphar.2021.174668] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 11/27/2021] [Accepted: 11/30/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Sepsis often results in acute lung injury (ALI). Dexmedetomidine (Dex) was reported to protect cells and organs due to its direct cellular effects. This study aims to investigate the role of vagus nerves on Dex induced lung protection in lipopolysaccharide (LPS)-induced ALI rats. METHODS The bilateral cervical vagus nerve of male Sprague-Dawley rats was sectioned or just exposed as sham surgery. After LPS administration, Dex antagonist yohimbine (YOH) and/or Dex was injected intraperitoneally to rats with or without vagotomy. The severity of ALI was determined with survival curve analysis and lung pathological scores. The plasma concentrations of interleukin 1 beta (IL-1β), tumor necrosis factor-alpha (TNF-α), catecholamine and acetylcholine were measured with enzyme-linked immunosorbent assay. RESULTS The median survival time of LPS-induced ALI rats was prolonged by Dex (22 h, 95% CI, [24.46, 92.20]) vs. 14 h, 95% CI, [14.60, 89.57] of the LPS control group, P < 0.05), and the ALI score was reduced by Dex (6.5, 95% CI, [5.23, 8.10] vs. 11.5, 95% CI, [10.23, 13.10] in the LPS group, P < 0.01). However, these protective effects were significantly decreased by either YOH administration or vagotomy. Dex decreased LPS-induced IL-1β, TNF-α, and catecholamine but increased acetylcholine in blood serum; these effects of Dex was partially abolished by vagotomy. CONCLUSIONS Our data suggested that Dex increased vagal nerve tone that partially contributed to its anti-inflammatory and lung-protective effects. The indirect anti-inflammation and direct cytoprotection of Dex are likely through high vagal nerve tone and α2-adrenoceptor activation, respectively.
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Affiliation(s)
- Yumo Li
- Department of Anesthesiology, Perioperative and Pain Medicine, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Binbin Wu
- Department of Anesthesiology, Perioperative and Pain Medicine, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Cong Hu
- Department of Anesthesiology, Perioperative and Pain Medicine, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China; Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom
| | - Jie Hu
- Department of Anesthesiology, Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, Henan, China
| | - Qingquan Lian
- Department of Anesthesiology, Perioperative and Pain Medicine, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jun Li
- Department of Anesthesiology, Perioperative and Pain Medicine, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Daqing Ma
- Division of Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, United Kingdom.
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Assessing the Antioxidant Activity of Dexmedetomidine by Measuring the Plasma Antioxidant Enzyme Activity of Catalase, Glutathione Peroxidase, and Superoxide Dismutase During Lumbar Spine Laminectomy. ARCHIVES OF NEUROSCIENCE 2021. [DOI: 10.5812/ans.118182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background: Current knowledge on antioxidant properties of anesthetics is inconclusive. Nevertheless, experiments on different anesthesia-related drugs and techniques are growing. Objectives: The aim of this prospective blinded randomized study was to assess the effect of dexmedetomidine (Dex) infusion during anesthesia on oxidative stress resulting from lumbar laminectomy. Methods: The antioxidant activity of Dex compared to placebo (normal saline) was evaluated by measuring the antioxidant enzyme activity of catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPX). A total of 56 patients who underwent laminectomy surgery were allocated into two groups of intervention and control. Dex group received 0.6 µg.kg-1 dexmedetomidine infusion before induction of anesthesia over 15 minutes, followed by 0.4 µg.kg-1.hr-1 maintenance. Control group received the same volume and sequence of normal saline. Anesthesia protocol was similar in both groups. The antioxidant activity of the previously mentioned enzymes was measured at the beginning of the anesthesia (T1) and after surgery (T2). Propofol consumption, hemodynamic indices, shivering, bleeding volume, and pain numeric rating scale (NRS) were recorded. Results: Although the serum levels of CAT and GPX increased during the procedure, these changes were not significant (P-values 0.579 and 0.762, respectively). Also, the mean SOD level did not change over time in any of the groups, and it was not meaningfully different between the groups at any of the predetermined times (P-value 0.665). Conclusions: As expected, Dex decreased propofol consumption, mean heart rate, mean arterial pressure, and pain intensity allover the perioperative period. It seems that adding Dex to anesthesia regimen during laminectomy had no dominant antioxidant effects.
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Zheng S, Yu S, Fan X, Zhang Y, Sun Y, Lin L, Wang H, Pan Y, Li C. Porphyromonas gingivalis survival skills: Immune evasion. J Periodontal Res 2021; 56:1007-1018. [PMID: 34254681 DOI: 10.1111/jre.12915] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 05/27/2021] [Accepted: 06/30/2021] [Indexed: 01/06/2023]
Abstract
Periodontitis is a chronic inflammatory condition that destroys the tooth-supporting tissues and eventually leads to tooth loss. As one of the most prevalent oral conditions, periodontitis endangers the oral health of 70% of people throughout the world. Periodontitis is also related to various systemic diseases, such as diabetes mellitus, atherosclerosis, and rheumatoid arthritis, which not only has a great impact on population health status and the quality of life but also increases the social burden. Porphyromonas gingivalis (P. gingivalis) is a gram-negative oral anaerobic bacterium that plays a key role in the pathogenesis of periodontitis. Porphyromonas gingivalis can express various of virulence factors to overturn innate and adaptive immunities, which makes P. gingivalis survive and propagate in the host, destroy periodontal tissues, and have connection to systemic diseases. Porphyromonas gingivalis can invade into and survive in host tissues by destructing the gingival epithelial barrier, internalizing into the epithelial cells, and enhancing autophagy in epithelial cells. Deregulation of complement system, degradation of antibacterial peptides, and destruction of phagocyte functions facilitate the evasion of P. gingivalis. Porphyromonas gingivalis can also suppress adaptive immunity, which allows P. gingivalis to exist in the host tissues and cause the inflammatory response persistently. Here, we review studies devoted to understanding the strategies utilized by P. gingivalis to escape host immunity. Methods for impairing P. gingivalis immune evasion are also mentioned.
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Affiliation(s)
- Shaowen Zheng
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Shiwen Yu
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Xiaomiao Fan
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Yonghuan Zhang
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Yangyang Sun
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Li Lin
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Hongyan Wang
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China.,Liaoning Provincial Key Laboratory of Oral Disease, Shenyang, China
| | - Yaping Pan
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
| | - Chen Li
- Department of Periodontology, School and Hospital of Stomatology, China Medical University, Shenyang, China
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Wei Q, Chen J, Xiao F, Tu Y, Zhong Y, Xie Y. High-Dose Dexmedetomidine Promotes Apoptosis in Fetal Rat Hippocampal Neurons. DRUG DESIGN DEVELOPMENT AND THERAPY 2021; 15:2433-2444. [PMID: 34135573 PMCID: PMC8197572 DOI: 10.2147/dddt.s300247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 05/04/2021] [Indexed: 11/23/2022]
Abstract
Objective Dexmedetomidine (DEX) is a potent a2-adrenoceptor agonist that has sedative, analgesic, and anxiolytic effects. Its primary clinical use is as an adjunct to general anesthesia to reduce anesthetic doses, provide analgesia and sedation in the preoperative and postoperative periods, it also used in intensive care units (ICUs). However, high concentrations of DEX may have toxic effects on neurons and cause neuronal apoptosis. This study aimed to evaluate the potential proapoptotic effects of DEX on fetal rat hippocampal neurons. Methods Primary hippocampal were cultured in vitro for 8 days and incubated with different DEX concentrations for 3 h. Cell viability was measured using cell counting kit-8 assays. Cell apoptosis was evaluated using flow cytometry. The expression of apoptosis-related proteins, such as cleaved caspase-3, caspase-9, Cyt-c, Bax, and Bcl-2, was measured by Western blotting. The mitochondrial ATP levels, Δψm, and ROS analyzed were conducted. Results High concentrations of DEX (≥100 μM) significantly reduced cell viability, induced neuronal apoptosis, upregulated the protein expression of cleaved caspase 3, Bax, cleaved caspase 9, and Cyt-c. DEX also considerably promoted the release of ROS. However, DEX (≥100 μM) downregulated the protein expression of Bcl-2, decreased the mitochondrial membrane potential (MTP), and reduced ATP synthesis. Conclusion High concentrations of dexmedetomidine produced toxic effects on neurons and caused neuronal apoptosis.
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Affiliation(s)
- Qiufeng Wei
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Jing Chen
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Fei Xiao
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Youbing Tu
- Department of Anesthesiology, Shenzhen People's Hospital, The First Affiliated Hospital of Southern University of Science and Technology, Shenzhen, Guangdong, 518020, People's Republic of China
| | - Yu Zhong
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People's Republic of China
| | - Yubo Xie
- Department of Anesthesiology, The First Affiliated Hospital of Guangxi Medical University, Nanning, 530021, People's Republic of China
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Kim S, Park SJ, Nam SB, Song SW, Han Y, Ko S, Song Y. Pulmonary effects of dexmedetomidine infusion in thoracic aortic surgery under hypothermic circulatory arrest: a randomized placebo-controlled trial. Sci Rep 2021; 11:10975. [PMID: 34040043 PMCID: PMC8155071 DOI: 10.1038/s41598-021-90210-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 05/07/2021] [Indexed: 02/04/2023] Open
Abstract
Dexmedetomidine has emerged as a promising organ protective agent. We performed prospective randomized placebo-controlled trial investigating effects of perioperative dexmedetomidine infusion on pulmonary function following thoracic aortic surgery with cardiopulmonary bypass and moderate hypothermic circulatory arrest. Fifty-two patients were randomized to two groups: the dexmedetomidine group received 1 µg/kg of dexmedetomidine over 20 min after induction of anesthesia, followed by 0.5 µg/kg/h infusion until 12 h after aortic cross clamp (ACC)-off, while the control group received the same volume of normal saline. The primary endpoints were oxygenation indices including arterial O2 partial pressure (PaO2) to alveolar O2 partial pressure ratio (a/A ratio), (A-a) O2 gradient, PaO2/FiO2 and lung mechanics including peak inspiratory and plateau pressures and compliances, which were assessed after anesthesia induction, 1 h, 6 h, 12 h, and 24 h after ACC-off. The secondary endpoints were serum biomarkers including interleukin-6, tumor necrosis factor-α, superoxide dismutase, and malondialdehyde (MDA). As a result, dexmedetomidine did not confer protective effects on the lungs, but inhibited elevation of serum MDA level, indicative of anti-oxidative stress property, and improved urine output and lower requirements of vasopressors.
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Affiliation(s)
- Seongsu Kim
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Soo Jung Park
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Sang Beom Nam
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea ,grid.15444.300000 0004 0470 5454Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, South Korea
| | - Suk-Won Song
- grid.15444.300000 0004 0470 5454Department of Cardiovascular Surgery, Yonsei University College of Medicine, Seoul, South Korea
| | - Yeonseung Han
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Sangmin Ko
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Young Song
- grid.15444.300000 0004 0470 5454Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine, Seoul, South Korea ,grid.15444.300000 0004 0470 5454Anesthesia and Pain Research Institute, Yonsei University College of Medicine, Seoul, South Korea
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Dexmedetomidine alleviated neuropathic pain in dorsal root ganglion neurons by inhibition of anaerobic glycolysis activity and enhancement of ROS tolerance. Biosci Rep 2021; 40:222638. [PMID: 32285913 PMCID: PMC7201561 DOI: 10.1042/bsr20191994] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 02/23/2020] [Accepted: 04/08/2020] [Indexed: 01/29/2023] Open
Abstract
Neuropathic pain is a kind of chronic pain that is triggered or caused primarily by damage to the nervous system and neurological dysfunction. It’s known that dexmedetomidine is a new type of highly selective alpha2-adrenoceptor agonist with sedation, anti-anxiety, analgesic and other effects. However, the function and mechanism of dexmedetomidine on neuropathic pain are not clear. Rat DRG neurons were isolated and identified using immunofluorescence assay. Following treatment with H2O2, dexmedetomidine or ROS inhibitor (NAC), the apoptosis and ROS levels were examined by flow cytometery; apoptosis- and anaerobic glycolysis-related proteins were determined by Western blot assay; glucose consumption, pyruvic acid, lactic acid and ATP/ADP ratios were also measured. The results revealed that dexmedetomidine inhibited H2O2-induced apoptosis and reactive oxygen species (ROS) in rat DRG neurons and in addition, dexmedetomidine down-regulated the expression levels of anaerobic glycolysis-related proteins, significantly reduced glucose, pyruvic acid and lactic acid levels. It also increased the ATP/ADP ratio in H2O2-treated rat dorsal root ganglion (DRG) neurons. Moreover, we also demonstrated that ROS inhibitor (NAC) also inhibited H2O2-induced apoptosis and anaerobic glycolysis in rat DRG neurons. In conclusion, dexmedetomidine suppressed H2O2-induced apoptosis and anaerobic glycolysis activity by inhibiting ROS, in rat DRG neurons. Therefore, dexmedetomidine might play a pivotal role in neuropathic pain by the inhibition of ROS.
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Cytotoxic Mechanism of Sphaerodactylomelol, an Uncommon Bromoditerpene Isolated from Sphaerococcus coronopifolius. Molecules 2021; 26:molecules26051374. [PMID: 33806445 PMCID: PMC7961984 DOI: 10.3390/molecules26051374] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 02/21/2021] [Accepted: 02/26/2021] [Indexed: 11/17/2022] Open
Abstract
Marine natural products have exhibited uncommon chemical structures with relevant antitumor properties highlighting their potential to inspire the development of new anticancer agents. The goal of this work was to study the antitumor activities of the brominated diterpene sphaerodactylomelol, a rare example of the dactylomelane family. Cytotoxicity (10-100 µM; 24 h) was evaluated on tumor cells (A549, CACO-2, HCT-15, MCF-7, NCI-H226, PC-3, SH-SY5Y, SK-ML-28) and the effects estimated by MTT assay. Hydrogen peroxide (H2O2) levels and apoptosis biomarkers (membrane translocation of phosphatidylserine, depolarization of mitochondrial membrane potential, Caspase-9 activity, and DNA condensation and/or fragmentation) were studied in the breast adenocarcinoma cellular model (MCF-7) and its genotoxicity on mouse fibroblasts (L929). Sphaerodactylomelol displayed an IC50 range between 33.04 and 89.41 µM without selective activity for a specific tumor tissue. The cells' viability decrease was accompanied by an increase on H2O2 production, a depolarization of mitochondrial membrane potential and an increase of Caspase-9 activity and DNA fragmentation. However, the DNA damage studies in L929 non-malignant cell line suggested that this compound is not genotoxic for normal fibroblasts. Overall, the results suggest that the cytotoxicity of sphaerodactylomelol seems to be mediated by an increase of H2O2 levels and downstream apoptosis.
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Hafez MH, Elblehi SS, El-Sayed YS. Date palm fruit extract ameliorated pancreatic apoptosis, endocrine dysfunction and regulatory inflammatory cytokines in Streptozotocin-induced diabetes in rats. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:43322-43339. [PMID: 32737781 DOI: 10.1007/s11356-020-10262-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 07/22/2020] [Indexed: 06/11/2023]
Abstract
The current work studied the mechanism(s) and ability by which date palm (Phoenix dactylifera L.) fruit extract (DPE) inspired a glucose-lowering impact in rats suffering from diabetes. Forty-eight albino rats were divided into six various experimental treatments after induction of diabetes by intraperitoneal infusion of streptozotocin (45 mg/kg bwt) as follows: normal control, DPE, diabetic control, diabetic glibenclamide (GLI), diabetic DPE, and diabetic GLI plus DPE-treated groups. In animals euthanized after 8 weeks, blood and pancreatic tissue samples were assembled to assess different biochemical and histopathological changes. The expressions of insulin, B cell lymphoma-2 (Bcl-2), and cysteine aspartate-specific protease-3 (caspase-3) in islet β cells were also evaluated using immunohistochemical assessment. Diabetic rats exhibited hyperglycemia; increment of pancreatic malondialdehyde (lipid peroxidation biomarker), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β); and decrement of plasma insulin and pancreatic antioxidants: glutathione, superoxide dismutase, and catalase values. Also, the pancreatic islets exhibited histopathological and morphometric alternations associated with weak positive insulin and Bcl-2 immunoreactivity and strong positive caspase-3 immunoreactivity. DPE and/or GLI, an anti-diabetic drug, improved the pancreatic histoarchitecture and improved β cell function and structure, which increased insulin levels and improved the insulin, Bcl-2, and caspase-3 immunoreactivity in diabetic rats. Nevertheless, the combined DPE and GLI therapy revealed a significant recovery and restoration of β cells' structure and function. The date palm fruit has anti-apoptotic, anti-inflammatory, and antioxidant activities and hypoglycemic effects, which in turn play a pivotal role in avoiding the progression of diabetes mellitus. Moreover, it could potentiate the glucose-lowering activity of anti-diabetic drugs.
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Affiliation(s)
- Mona H Hafez
- Department of Physiology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Samar S Elblehi
- Department of Pathology, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Yasser S El-Sayed
- Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt.
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Zhu CH, Yu J, Wang BQ, Nie Y, Wang L, Shan SQ. Dexmedetomidine reduces ventilator-induced lung injury via ERK1/2 pathway activation. Mol Med Rep 2020; 22:5378-5384. [PMID: 33173983 PMCID: PMC7647005 DOI: 10.3892/mmr.2020.11612] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 09/15/2020] [Indexed: 02/07/2023] Open
Abstract
Mechanical ventilation (MV) can contribute to ventilator-induced lung injury (VILI); dexmedetomidine (Dex) treatment attenuates MV-related pulmonary inflammation, but the mechanisms remain unclear. Therefore, the present study aimed to explore the protective effect and the possible molecular mechanisms of Dex in a VILI rodent model. Adult male Sprague-Dawley rats were randomly assigned to one of seven groups (n=24 rats/group). Rats were euthanized after 4 h of continuous MV, and pathological changes, lung wet/dry (W/D) weight ratio, the levels of inflammatory cytokines (IL-1β, TNF-α and IL-6) in the bronchoalveolar lavage fluid (BALF), and the expression levels of Bcl-2 homologous antagonist/killer (Bak), Bcl-2, pro-caspase-3, cleaved caspase-3 and the phosphorylation of ERK1/2 in the lung tissues were measured. Propidium iodide uptake and TUNEL staining were used to detect epithelial cell death. The Dex pretreatment group exhibited fewer pathological changes, lower W/D ratios and lower expression levels of inflammatory cytokines in BALF compared with the VILI group. Dex significantly attenuated the ratio of Bak/Bcl-2, cleaved caspase-3 expression levels and epithelial cell death, and increased the expression of phosphorylated ERK1/2. The protective effects of Dex could be partially reversed by PD98059, which is a mitogen-activated protein kinase (upstream of ERK1/2) inhibitor. Overall, dexmedetomidine was found to reduce the inflammatory response and epithelial cell death caused by VILI, via the activation of the ERK1/2 signaling pathway.
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Affiliation(s)
- Chun-Hua Zhu
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Jian Yu
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Ben-Qing Wang
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Yu Nie
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Lei Wang
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
| | - Shi-Qiang Shan
- Department of Anesthesiology, Cangzhou Central Hospital, Cangzhou, Hebei 061000, P.R. China
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24
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Tang L, Zhu L, Zhang W, Yang X, Chen Q, Meng Z, Liu J, Sun Y, Hu J, Ni Z, Wang X. Qi-Xian Decoction Upregulated E-cadherin Expression in Human Lung Epithelial Cells and Ovalbumin-Challenged Mice by Inhibiting Reactive Oxygen Species-Mediated Extracellular-Signal-Regulated Kinase (ERK) Activation. Med Sci Monit 2020; 26:e922003. [PMID: 32833955 PMCID: PMC7461650 DOI: 10.12659/msm.922003] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background Loss of the epithelial barrier is characterized by a reduction in E-cadherin expression and is a hallmark of asthma. Qi-xian decoction (QXT) is a Chinese medicinal formula that has been used to effectively treat asthma. This study aimed to investigate the effect of QXT on E-cadherin expression in human lung epithelial 16HBE cells and ovalbumin-challenged mice and to explore the underlying molecular mechanism. Material/Methods Ovalbumin (OVA)-induced mice were used as a model of asthma. Real-time PCR and Western blotting were utilized to examine mRNA and protein levels. Lung tissue reactive oxygen species (ROS) levels were evaluated using dichloro-dihydro-fluorescein diacetate (DCFH-DA). Serum superoxide dismutase (SOD) and the total antioxidant capacity (TAOC) were measured via enzyme-linked immunosorbent assay (ELISA)-based analyses. 16HBE cells were utilized to explore the effect of QXT or hydrogen peroxide (H2O2) on the expression of E-cadherin in vitro. Results We found that QXT treatment increased E-cadherin expression and decreased extracellular-signal-regulated kinase (ERK) phosphorylation levels in the lung tissues of OVA-challenged mice. QXT also downregulated ROS levels and increased serum SOD and TAOC levels in OVA-challenged mice. In vitro studies demonstrated that increased ROS generation induced by H2O2 resulted in decreased E-cadherin expression levels in 16HBE cells, which was attenuated by inhibition of ERK signaling. Moreover, the H2O2-induced downregulation of E-cadherin expression, increased ROS generation, and ERK activation in 16HBE cells were restored by treatment with QXT water or ethanol extract. Conclusions These data demonstrate that one mechanism by which QXT protects against asthma is to restore E-cadherin expression in vivo and in vitro by inhibiting ROS-mediated ERK activation.
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Affiliation(s)
- Lingling Tang
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Linyun Zhu
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Wei Zhang
- Department of Respiratory Medicine, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Xiaoyan Yang
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Qingge Chen
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Ziyu Meng
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Jinjin Liu
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Yipeng Sun
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Junsheng Hu
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Zhenhua Ni
- Central Laboratory, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
| | - Xiongbiao Wang
- Department of Respiratory Medicine, Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China (mainland)
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Zhang W, Yu J, Guo M, Ren B, Tian Y, Hu Q, Xie Q, Xu C, Feng Z. Dexmedetomidine Attenuates Glutamate-Induced Cytotoxicity by Inhibiting the Mitochondrial-Mediated Apoptotic Pathway. Med Sci Monit 2020; 26:e922139. [PMID: 32419697 PMCID: PMC7251967 DOI: 10.12659/msm.922139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Background Glutamate (GLU) is the most excitatory amino acid in the central nervous system and plays an important role in maintaining the normal function of the nervous system. During cerebral ischemia, massive release of GLU leads to neuronal necrosis and apoptosis. It has been reported that dexmedetomidine (DEX) possesses anti-oxidant and anti-apoptotic properties. The objective of this study was to investigate the effects of DEX on GLU-induced neurotoxicity in PC12 cells. Material/Methods PC12 cells were treated with 20 mM GLU to establish an ischemia-induced injury model. Cell viability was accessed by MTT assay. MDA content and SOD activity were analyzed by assay kits. Apoptosis rate, ROS production, intracellular Ca2+ concentration, and MMP were evaluated by flow cytometry. Western blot analysis was performed to analyze expressions of caspase-3, caspase-9, cyt-c, bax, and bcl-2. Results PC12 cells treated with GLU exhibited reduced cell viability and increased apoptosis rates, which were ameliorated by pretreatment with DEX. DEX significantly increased SOD activity, reduced content of MDA, and decreased production of ROS in PC12 cells. In addition, DEX clearly reduced the level of intracellular Ca2+ and attenuated the decline of MMP. Moreover, DEX notably reduced expressions of caspase-3, caspase-9, cyt-c, and bax and increased expression of bcl-2. Conclusions Our findings suggest that DEX can protect PC12 cells against GLU-induced cytotoxicity, which may be attributed to its anti-oxidative property and reduction of intracellular calcium overload, as well as its ability to inhibit the mitochondria-mediated apoptotic pathway.
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Affiliation(s)
- Weidong Zhang
- Anesthesia and Operation Center, The First Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland).,Anesthesia and Operation Center, The Fifth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Jun Yu
- Department of Anesthesiology, The Fourth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Mengzhuo Guo
- Department of Anesthesiology, Beijing Tsinghua Changung Hospital, Beijing, China (mainland)
| | - Bo Ren
- Anesthesia and Operation Center, The Fifth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Yanyan Tian
- Department of Anesthesiology, Air Force Characteristic Medical Center, Beijing, China (mainland)
| | - Qinggang Hu
- Department of Anesthesiology, The Fourth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Qun Xie
- Department of Anesthesiology, The Fourth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Chen Xu
- Anesthesia and Operation Center, The Fifth Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
| | - Zeguo Feng
- Anesthesia and Operation Center, The First Medical Center of People's Liberation Army (PLA) General Hospital, Beijing, China (mainland)
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26
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Liu XM, Chen QH, Hu Q, Liu Z, Wu Q, Liang SS, Zhang HG, Zhang Q, Zhang XK. Dexmedetomidine protects intestinal ischemia-reperfusion injury via inhibiting p38 MAPK cascades. Exp Mol Pathol 2020; 115:104444. [PMID: 32335082 DOI: 10.1016/j.yexmp.2020.104444] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/15/2020] [Accepted: 04/21/2020] [Indexed: 12/15/2022]
Abstract
Intestinal ischemia-reperfusion (I/R) is a life-threatening condition associated with high morbidity and mortality. Dexmedetomidine (DEX), an agonist of α2-adrenoceptor with sedation and analgesia effect, has recently been identified with protective function against I/R injury in multiple organs. However, the mechanism underlying the beneficial effect of DEX on intestine after I/R injury remained poorly understood. In the present study, using in both in vitro and in vivo models, we found that intestinal I/R injury was associated with the activation of p38 MAPK cascade, while DEX was capable of deactivating p38 MAPK and thus protect intestinal cells from apoptosis by inhibiting p38 MAPK-mediated mitochondrial depolarization and cytochrome c (Cyto C) release. Moreover, through inhibiting p38 MAPK activity, the downstream production of pro-inflammatory cytokines-regulated by NF-κB was also suppressed by DEX treatment, leading to the resolution of I/R-induced inflammation in intestine. In general, our study provided evidence that DEX protected intestine from I/R injury by inhibiting p38 MAPK-mediated mitochondrial apoptosis and inflammatory response.
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Affiliation(s)
- Xiao-Ming Liu
- Department of Thoracic Surgery, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Qiu-Hong Chen
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Qian Hu
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Zhen Liu
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Qiong Wu
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Si-Si Liang
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Huai-Gen Zhang
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Qin Zhang
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xue-Kang Zhang
- Department of Anesthesiology, the First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, China.
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Kaye AD, Chernobylsky DJ, Thakur P, Siddaiah H, Kaye RJ, Eng LK, Harbell MW, Lajaunie J, Cornett EM. Dexmedetomidine in Enhanced Recovery After Surgery (ERAS) Protocols for Postoperative Pain. Curr Pain Headache Rep 2020; 24:21. [PMID: 32240402 PMCID: PMC7223065 DOI: 10.1007/s11916-020-00853-z] [Citation(s) in RCA: 104] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Effective acute pain management has evolved considerably in recent years and is a primary area of focus in attempts to defend against the opioid epidemic. Persistent postsurgical pain (PPP) has an incidence of up to 30-50% and has negative outcome of quality of life and negative burden on individuals, family, and society. The 2016 American Society of Anesthesiologists (ASA) guidelines states that enhanced recovery after surgery (ERAS) forms an integral part of Perioperative Surgical Home (PSH) and is now recommended to use a multimodal opioid-sparing approach for management of postoperative pain. As such, dexmedetomidine is now being used as part of ERAS protocols along with regional nerve blocks and other medications, to create a satisfactory postoperative outcome with reduced opioid consumption in the Post anesthesia care unit (PACU). RECENT FINDINGS Dexmedetomidine, a selective alpha2 agonist, possesses analgesic effects and has a different mechanism of action when compared with opioids. When dexmedetomidine is initiated at the end of a procedure, it has a better hemodynamic stability and pain response than ropivacaine. Dexmedetomidine can be used as an adjuvant in epidurals with local anesthetic sparing effects. Its use during nerve blocks results in reduced postoperative pain. Also, local infiltration of IV dexmedetomidine is associated with earlier discharge from PACU. Perioperative use of dexmedetomidine has significantly improved postoperative outcomes when used as part of ERAS protocols. An in-depth review of the use of dexmedetomidine in ERAS protocols is presented for clinical anesthesiologists.
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Affiliation(s)
- Alan David Kaye
- Department of Anesthesiology and Pharmacology, Toxicology, and Neurosciences, Louisiana State University School of Medicine, Shreveport, LA USA
| | | | - Pankaj Thakur
- Department of Anesthesiology, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA 71103 USA
| | - Harish Siddaiah
- Department of Anesthesiology, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA 71103 USA
| | - Rachel J. Kaye
- Medical University of South Carolina, Charleston, SC 29425 USA
| | - Lauren K. Eng
- Tulane University School of Medicine, New Orleans, LA 70112 USA
| | - Monica W. Harbell
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, 5777 East Mayo Boulevard, Phoenix, AZ 85054 USA
| | - Jared Lajaunie
- Department of Anesthesiology, LSU Health Sciences Center, Room 656, 1542 Tulane Ave., New Orleans, LA 70112 USA
| | - Elyse M. Cornett
- Department of Anesthesiology, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA 71103 USA
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Zheng LN, Guo FQ, Li ZS, Wang Z, Ma JH, Wang T, Wei JF, Zhang WW. Dexmedetomidine protects against lidocaine-induced neurotoxicity through SIRT1 downregulation-mediated activation of FOXO3a. Hum Exp Toxicol 2020; 39:1213-1223. [PMID: 32228195 DOI: 10.1177/0960327120914971] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lidocaine, a typical local anesthetic, has been shown to directly induce neurotoxicity in clinical settings. Dexmedetomidine (DEX) is an alpha-2-adrenoreceptor agonist that has been used as anxiolytic, sedative, and analgesic agent which has recently found to protect against lidocaine-induced neurotoxicity. Nicotinamide adenine dinucleotide-dependent deacetylase sirtuin-1 (SIRT1)/forkhead box O3 (FOXO3a) signaling is critical for maintaining neuronal function and regulation of the apoptotic pathway. In the present study, we designed in vitro and in vivo models to investigate the potential effects of lidocaine and DEX on SIRT1 and FOXO3a and to verify whether SIRT1/FOXO3a-mediated regulation of apoptosis is involved in DEX-induced neuroprotective effects against lidocaine. We found that in both PC12 cells and brains of mice, lidocaine decreased SIRT1 level through promoting the degradation of SIRT1 protein. Lidocaine also increased FOXO3a protein level and increased the acetylation of SIRT1 through inhibiting SIRT1. Upregulation of SIRT1 or downregulation of FOXO3a significantly inhibited lidocaine-induced changes in both cell viability and apoptosis. DEX significantly inhibited the lidocaine-induced decrease of SIRT1 protein level and increase of FOXO3a protein level and acetylation of FOXO3a. Downregulation of SIRT1 or upregulation of FOXO3a suppressed DEX-induced neuroprotective effects against lidocaine. The data suggest that SIRT1/FOXO3a is a potential novel target for alleviating lidocaine-induced neurotoxicity and provide more theoretical support for the use of DEX as an effective adjunct to alleviate chronic neurotoxicity induced by lidocaine.
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Affiliation(s)
- L-N Zheng
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - F-Q Guo
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - Z-S Li
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - Z Wang
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - J-H Ma
- Department of Neurosurgery, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - T Wang
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - J-F Wei
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
| | - W-W Zhang
- Department of Anesthesiology, Shanxi Provincial People's Hospital, Tai Yuan, Shanxi, China
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29
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Chen Y, Bian W, Xu B. Pretreatment with dexmedetomidine alleviates lung injury in a rat model of intestinal ischemia reperfusion. Mol Med Rep 2020; 21:1233-1241. [PMID: 32016469 PMCID: PMC7003052 DOI: 10.3892/mmr.2020.10942] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/18/2019] [Indexed: 01/11/2023] Open
Abstract
The aim of the present study was to investigate the antioxidant mechanisms of dexmedetomidine against lung injury during intestinal ischemia reperfusion (IIR) in rats. The model of IIR-induced acute lung injury was established by occluding the superior mesenteric artery (SMA) for 1 h and reperfusing for 2 h using Sprague-Dawley rats. Pathological examination was used to assess the extent of the lung injury. Oxidative stress was evaluated by measuring malondialdehyde, myeloperoxidase and superoxide dismutase in the lung and plasma. The proinflammatory cytokines tumor necrosis factor-α and interleukin-6 were determined via an enzyme-linked immunosorbent assay. The mRNA and protein expression of nuclear factor-erythroid 2 related factor 2 (Nrf2) and heme oxygenase 1 (HO-1) were determined using a reverse transcription-quantitative polymerase chain reaction and western blotting. Pretreatment with dexmedetomidine significantly inhibited the oxidative stress response and proinflammatory factor release caused by IIR compared with the normal saline group (MDA and SOD in lung and plasma, P<0.05; MPO, IL-1β and TNF-α in lung and plasma, P<0.05). Dexmedetomidine improved pulmonary pathological changes in IIR rats compared with the normal saline group. Investigations into the molecular mechanism revealed that dexmedetomidine increased the expression levels of Nrf2 and HO-1 via activating α2 adrenergic receptors compared with the normal saline group. The antagonism of α2 adrenergic receptors may reverse the protective effect of dexmedetomidine on lung injury during IIR, including decreasing the expression levels of Nrf2 and HO-1, elevating the oxidative stress response and increasing the proinflammatory factor release. In conclusion, pretreatment with dexmedetomidine demonstrated protective effects against lung injury during IIR via α2 adrenergic receptors. The Nrf2/HO-1 signaling pathway may serve a function in the protective effect of dexmedetomidine.
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Affiliation(s)
- Yaping Chen
- Department of Anesthesiology, Jinshan Hospital, Fudan University, Shanghai 200000, P.R. China
| | - Wenyu Bian
- Department of Anesthesiology, Renji Hospital, Jiaotong University School of Medicine, Shanghai 200127, P.R. China
| | - Bo Xu
- Department of Anesthesiology and SICU, Xinhua Hospital, Jiaotong University School of Medicine, Shanghai 200092, P.R. China
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Wang K, Wu M, Xu J, Wu C, Zhang B, Wang G, Ma D. Effects of dexmedetomidine on perioperative stress, inflammation, and immune function: systematic review and meta-analysis. Br J Anaesth 2019; 123:777-794. [DOI: 10.1016/j.bja.2019.07.027] [Citation(s) in RCA: 160] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 06/26/2019] [Accepted: 07/03/2019] [Indexed: 01/06/2023] Open
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Li SP, Zhou XL, Zhao Y. Sedation with midazolam worsens the diaphragm function than dexmedetomidine and propofol during mechanical ventilation in rats. Biomed Pharmacother 2019; 121:109405. [PMID: 31810122 DOI: 10.1016/j.biopha.2019.109405] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 08/25/2019] [Accepted: 08/28/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Mechanical ventilation (MV) is identified as an independent contributor to diaphragmatic atrophy and contractile dysfunction. Appropriate sedation is also essential during MV, and anesthetics may have direct adverse effects on the diaphragm. However, there is a lack of research into the effects of different anesthetics on diaphragm function during MV. OBJECTIVES In the present study, we aim to examine the effect of midazolam, dexmedetomidine, and propofol on diaphragm function during MV. DESIGN Animal study. SETTING University research laboratory. SUBJECTS Male Wistar rats. INTERVENTIONS Animals were experienced 12 h of MV or spontaneous breathing (SB) with continuous anesthetics infusion. Diaphragm contractile properties, cross-sectional areas, microcirculation, oxidative stress, and proteolysis were examined. MEASUREMENTS AND MAIN RESULTS Diaphragmatic specific force was markedly reduced in the midazolam group compared with the dexmedetomidine (-60.4 ± 3.01%, p < 0.001) and propofol group (-58.3 ± 2.60%, p < 0.001) after MV. MV sedated with midazolam induced more atrophy of type II fibers compared with dexmedetomidine (-21.8 ± 2.11%, p = 0.0001) and propofol (-8.2 ± 1.53%, p = 0.003). No significant differences of these indices were found in the midazolam, dexmedetomidine, and propofol groups under SB condition (all p > 0.05, respectively). Twelve hours of MV resulted in a time dependent reduction in diaphragmatic functional capillary density (PB -25.1%, p = 0.0001; MZ -21.6%, p = 0.0003; DD -15.2%, p = 0.022; PP -24.8%, p = 0.0001, respectively), which did not occur in the gastrocnemius muscle. The diaphragmatic lipid peroxidation adducts 4-HNE and HIF-1α levels were significantly lower in dexmedetomidine group and propofol group compared to midazolam group (p < 0.05, respectively). Meanwhile, the catalase and SOD levels were also relatively lower (p < 0.05, respectively) in midazolam group compared to dexmedetomidine group and propofol group. CONCLUSIONS Twelve hours of mechanical ventilation during midazolam sedation led to a more severe diaphragm dysfunction than dexmedetomidine and propofol, possibly caused by its relative weaker antioxidant capacity.
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Affiliation(s)
- Shao-Ping Li
- 169 Donghu Road, Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China
| | - Xian-Long Zhou
- 169 Donghu Road, Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China
| | - Yan Zhao
- 169 Donghu Road, Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei, 430071, China.
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Chen HY, Li GH, Tan GC, Liang H, Lai XH, Huang Q, Zhong JY. Dexmedetomidine enhances hypoxia-induced cancer cell progression. Exp Ther Med 2019; 18:4820-4828. [PMID: 31772647 PMCID: PMC6861874 DOI: 10.3892/etm.2019.8136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 09/16/2019] [Indexed: 12/24/2022] Open
Abstract
Dexmedetomidine (DEX) is widely used in perioperative settings for analgesia and sedation; however, little is known about its effects on the hypoxia-induced progression of tumor cells. In the present study, the effects of DEX on hypoxia-induced growth and metastasis of lung cancer cells and colorectal cancer cells was examined. A549 cells and HCT116 cells were treated with normoxia, hypoxia, co-treatment of hypoxia and DEX, and atipamezole (an α2 adrenoceptor antagonist) for 4 h. The proliferation rate of cells was determined by MTT assays. Cell metastatic potential was evaluated by Transwell assays. Survivin and hypoxia inducible factor (HIF)-1α were detected by western blotting. Matrix metalloproteinase (MMP)-2 and MMP-9 were measured using reverse transcription-quantitative PCR. It was demonstrated that hypoxia treatment promoted the proliferation and may promote the metastasis of the two cancer cell lines. DEX substantially contributed to the survival and aggressiveness of the two cancer cell lines following hypoxia. Furthermore, DEX upregulated the expression of survivin, MMP-2, MMP-9 and HIF-1α in the two cancer cell lines in response to hypoxia. Finally, the effects of DEX on the hypoxia-induced growth and metastatic potential of cancer cells were reversed by atipamezole. Collectively, DEX enhances the hypoxia-induced progression of lung cancer cells and colorectal cancer cells by regulating HIF-1α signaling, which may be associated with the α2 adrenoceptor pathway.
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Affiliation(s)
- Hua Yan Chen
- Department of Anesthesiology, Affiliated FoShan Hospital of Sun Yat-Sen University, Foshan, Guangdong 528000, P.R. China
| | - Geng Hua Li
- Department of Anesthesiology, Affiliated Luoding Hospital of Guangdong Medical University, Luoding, Guangdong 527200, P.R. China
| | - Guo Cheng Tan
- Department of Anesthesiology, Affiliated Luoding Hospital of Guangdong Medical University, Luoding, Guangdong 527200, P.R. China
| | - Hua Liang
- Department of Anesthesiology, Affiliated FoShan Hospital of Sun Yat-Sen University, Foshan, Guangdong 528000, P.R. China
| | - Xiao Hong Lai
- Department of Anesthesiology, Affiliated FoShan Hospital of Sun Yat-Sen University, Foshan, Guangdong 528000, P.R. China
| | - Qiong Huang
- Department of Medical Statistics, Affiliated Chancheng Central Hospital of Guangdong Medical University, Foshan, Guangdong 528000, P.R. China
| | - Ji Ying Zhong
- Department of Anesthesiology, Affiliated FoShan Hospital of Sun Yat-Sen University, Foshan, Guangdong 528000, P.R. China
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Dexmedetomidine prevents septic myocardial dysfunction in rats via activation of α7nAChR and PI3K/Akt- mediated autophagy. Biomed Pharmacother 2019; 120:109231. [PMID: 31546082 DOI: 10.1016/j.biopha.2019.109231] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 07/13/2019] [Accepted: 07/15/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND AND PURPOSE Dexmedetomidine (Dex) has been shown to elicit cardio-protective effects in sepsis. The aim of this study was to investigate the role of autophagy in the protective effects of Dex and its possible mechanism in vivo and vitro. EXPERIMENTAL APPROACH 6-8-week-old male Wistar rats were performed cecal ligation puncture (CLP) and administered 0.9% saline (CLP group), 50 μg/kg Dex (Dex group), Dex plus chloroquine (20 mg/kg; Dex + CQ group), or 40 μg/kg methyllycaconitin (Dex + MLA group), or 25 μM LY294002 (Dex + LY294002 group). After study, cardiac histology, cardiac function, level of autophagy, cardiomyocytes apoptosis and inflammatory mediators including protein IL-1β, IL-6, and TNF-α were measured. The LPS induced-H9C2 cardiomyocytes were treated with Dex, Dex + CQ and detected for cell apoptosis, autophagy level and cell cycle. KEY RESULTS CLP-induced sepsis resulted in cardiac dysfunction, apoptosis, and inflammatory response. Dex exhibited protective effects on the myocardium by the induction of myocardial autophagy and ameliorated the LPS-induced blockade of autophagic flux in H9C2 cells. CQ was found to significantly inhibit Dex-mediated protection of myocardial apoptosis and inflammation. CLP rats treated with Dex in combination with MLA, an antagonist of α7 nicotinic acetylcholine receptor (α7nAChR), exhibited decreased autophagy and increased inflammation and cell death, identifying α7nAchR was involved in the Dex-mediated pathway. In addition, we found that the PI3K/Akt pathway is involved in Dex-mediated autophagy and convergent with α7nAChR-mediated stimulation of autophagy response. CONCLUSIONS AND IMPLICATIONS For the first time, these data indicate that autophagy is central in Dex-mediated cardio-protection in sepsis. These observations provide the foundation for further study, and may serve as the basis for innovative therapeutic strategies against septic myocardial dysfunction.
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Cao G, Zhang E. [Protective effects of dexmedetomidine against pulmonary ischemia-reperfusion injury during cardiopulmonary bypass in rats]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2019; 39:980-986. [PMID: 31511220 DOI: 10.12122/j.issn.1673-4254.2019.08.16] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate the signaling pathways that mediate the protective effects of dexmedetomidine on lung tissue against ischemia-reperfusion (I/R) injury during cardiopulmonary bypass (CPB). METHODS Forty adult SD rats were randomized into 5 groups, namely I/R group (group A), dexmedetomidine group (group B), sham-operated group (group C), oxypenicillin group (group D), and oxypenicillin + dexmedetomidine group (group E). The arterial blood gas, lung tissue apoptosis rate, protein kinase (Akt), phosphorylated Akt (p-AKT), caspase-3 and caspase-9 were compared among the 5 groups. RESULTS In groups A, B, D and E, the heart rate (HR), mean arterial pressure (MAP), and oxygenation index (OI) measured before CPB, at opening of the left hilar and at the end of experiment decreased gradually while the respiratory index (RI) increased at the 3 time points. At the end of experiment, HR, MAP, and OI in group B were significantly higher and RI was significantly lower than those in groups A, D and E (P < 0.05). In groups A-E, the pathological scores of the lung tissue at the end of the experiment were 4.89, 1.89, 0, 6.01 and 5.76, respectively, and the cell apoptosis rates in the lung tissue were 6.25%, 3.69%, 1.06%, 8.06% and 7.79%, respectively (P < 0.001). Western blotting showed that the expressions of Akt and p-AKT were the highest and those of caspase-3 and caspase-9 were the lowest in group B among the 5 groups (P < 0.05). CONCLUSIONS Dexmedetomidine can effectively alleviate lung injury in rats during CPB possibly by targeting caspase-3 and caspase-9 proteins that are related to PI3K/Akt signaling pathway.
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Affiliation(s)
- Ge Cao
- West China Hospital, Sichuang Univesity, Chengdu 610041, China
| | - Eryong Zhang
- West China Hospital, Sichuang Univesity, Chengdu 610041, China
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Dexmedetomidine exerts dual effects on human annulus fibrosus chondrocytes depending on the oxidative stress status. Biosci Rep 2019; 39:BSR20190419. [PMID: 31383789 PMCID: PMC6706599 DOI: 10.1042/bsr20190419] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Revised: 07/28/2019] [Accepted: 08/02/2019] [Indexed: 12/13/2022] Open
Abstract
Dexmedetomidine (Dex) is an anesthetic widely used in lumbar discectomy, but its effect on chondrocytes remains unclear. Dex is speculated to promote cartilage degeneration by activating α-2 adrenergic receptor. However, the antioxidative and anti-inflammatory effects of Dex implied the potential chondrocyte protective effect under stress conditions. The present study aimed to determine the effect of Dex on chondrocytes under non-stress and stress conditions. Chondrocytes were isolated from human annulus fibrosus (AF) tissues and oxidative stress was induced by treatment with 1 mM hydrogen peroxide (H2O2). Chondrocytes were treated with Dex alone or in combination with H2O2. Treatment with Dex alone decreased mRNA expression of COL2A1 and increased that of MMP-3 and MMP-13, thus contributing to cartilage degeneration. However, Dex prevented H2O2-induced death and degeneration of chondrocytes partly by enhancing antioxidant capacity. Mechanistically, Dex attenuated H2O2-mediated activation of NF-κB and NACHT, LRR, and PYD domains-containing protein 3 (NLRP3), both of which play key roles in inflammation and inflammatory damage. Dex inactivated NLRP3 through the suppression of NF-κB and JNK signals. Co-treatment with Dex and H2O2 increased protein level of XIAP (X-linked inhibitor-of-apoptosis, an anti-apoptosis protein), compared with H2O2 treatment alone. H2O2 treatment increased the expression of neural precursor cell expressed developmentally down-regulated protein 4 (NEDD4) that is a ubiquitin ligase targeting XIAP. However, Dex decreased the amount of NEDD4 adhering to XIAP, thus protecting XIAP protein from NEDD4-mediated ubiquitination and degradation. Given that surgery inevitably causes oxidative stress and inflammation, the protective effect of Dex on chondrocytes during oxidative stress is noteworthy and warrants further study.
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Wang Y, Mao X, Chen H, Feng J, Yan M, Wang Y, Yu Y. Dexmedetomidine alleviates LPS-induced apoptosis and inflammation in macrophages by eliminating damaged mitochondria via PINK1 mediated mitophagy. Int Immunopharmacol 2019; 73:471-481. [PMID: 31170676 DOI: 10.1016/j.intimp.2019.05.027] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 01/18/2019] [Accepted: 05/15/2019] [Indexed: 01/20/2023]
Abstract
The macrophage is an innate immune response cell that plays an important role in the development of sepsis. Dexmedetomidine (DEX) is a sedation drug, which have anti-oxidative, anti-inflammatory and anti-apoptosis effects and can be used on sepsis patients in the ICU. However, its mechanisms of action remain poorly understood. PTEN-induced putative kinase 1 (PINK1) is a mitochondrial serine/threonine protein kinase that recognizes damaged mitochondria and leads to mitophagy. This study investigated the effects of DEX on Lipopolysaccharides(LPS)-induced macrophage injury and explained the underlying mechanisms. The results showed that LPS treatment caused mitochondrial damage, mitochondria-dependent apoptosis and PINK1-mediated mitophagy; at the same time, PINK1 has a protective effect on LPS-induced macrophage apoptosis and inflammation by mitophagy that eliminates dysfunctional mitochondria. DEX could promote the clearance of damaged mitochondria characterized by low Mitochondrial membrane potential (MMP) and high reactive oxygen species(ROS), thus exerting a protective effect in LPS treated macrophages, and PINK1 mediated mitophagy is required for this protective effect.
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Affiliation(s)
- Yanyan Wang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Xing Mao
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Hongguang Chen
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Jingcheng Feng
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Mengying Yan
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Yaoqi Wang
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China
| | - Yonghao Yu
- Department of Anesthesiology, Tianjin Medical University General Hospital, Tianjin 300052, China; Tianjin Research Institute of Anesthesiology, Tianjin 300052, China.
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Irisin Contributes to the Hepatoprotection of Dexmedetomidine during Intestinal Ischemia/Reperfusion. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2019; 2019:7857082. [PMID: 31191804 PMCID: PMC6525857 DOI: 10.1155/2019/7857082] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/16/2019] [Accepted: 03/25/2019] [Indexed: 12/29/2022]
Abstract
Intestinal ischemia/reperfusion (I/R), which is associated with high morbidity and mortality, is also accompanied with abnormal energy metabolism and liver injury. Irisin, a novel exercise-induced hormone, can regulate adipose browning and thermogenesis. The following study investigated the potential role of dexmedetomidine in liver injury during intestinal I/R in rats. Adult male Sprague-Dawley rats underwent occlusion of the superior mesenteric artery for 90 min followed by 2 h of reperfusion. Dexmedetomidine or irisin-neutralizing antibody was intravenously administered for 1 h before surgery. The results demonstrated that severe intestine and liver injuries occurred during intestinal I/R as evidenced by pathological scores and an apparent increase in serum diamine oxidase (DAO), aspartate aminotransferase (AST), alanine aminotransferase (ALT), and lactate dehydrogenase (LDH) levels. In addition, the hepatic irisin, cleaved caspase-3, Bax, and NLRP3 inflammasome components (including NLRP3, ASC, and caspase-1), protein expressions, apoptotic index, reactive oxygen species (ROS), malondialdehyde (MDA), myeloperoxidase (MPO), tumor necrosis factor- (TNF-) α, and interleukin- (IL-) 6 levels increased; however, the serum irisin level and hepatic Bcl-2 protein expression and superoxide dismutase (SOD) activity decreased after intestinal I/R. Interestingly, dexmedetomidine could reduce the above listed changes and increase the irisin levels in plasma and the liver in I/R rats. Dexmedetomidine-mediated protective effects on liver injury and NLRP3 inflammasome activation during intestinal I/R were partially abrogated via irisin-neutralizing antibody treatment. The results suggest that irisin might contribute to the hepatoprotection of dexmedetomidine during intestinal ischemia/reperfusion.
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Feng X, Guan W, Zhao Y, Wang C, Song M, Yao Y, Yang T, Fan H. Dexmedetomidine ameliorates lipopolysaccharide-induced acute kidney injury in rats by inhibiting inflammation and oxidative stress via the GSK-3β/Nrf2 signaling pathway. J Cell Physiol 2019; 234:18994-19009. [PMID: 30919976 DOI: 10.1002/jcp.28539] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 02/22/2019] [Accepted: 03/05/2019] [Indexed: 12/19/2022]
Abstract
Acute kidney injury (AKI) is a frequent and serious complication of sepsis; however, there are currently no effective therapies. Inflammation and oxidative stress are the major mechanisms implicated in lipopolysaccharide (LPS)-induced AKI. Dexmedetomidine (DEX) has been reported to have remarkable anti-inflammatory and antioxidant effects. Here, we examined the renoprotective effects of DEX and potential underlying mechanisms in rats with LPS-induced AKI. We analyzed renal function and structure; serum inflammatory cytokine; renal oxidant and antioxidant levels; and renal expression of glycogen synthase kinase-3β (GSK-3β)/nuclear factor erythroid 2-related factor 2 (Nrf2) pathway-related proteins in rats 4 hr after administration of LPS. Pretreatment with DEX improved renal function and significantly reduced the levels of inflammatory cytokines and oxidative stress markers. Treatment with DEX and the GSK-3β inhibitor SB216367 promoted phosphorylation of GSK-3β, induced Nrf2 nuclear translocation, and increased transcription of the Nrf2 target genes heme oxygenase-1 and NAD(P)H quinone oxidoreductase-1, primarily in renal tubules. Alpha-2-adrenergic receptor (α2-AR) antagonist atipamezole and imidazoline I 2 receptor (I 2 R) antagonist idazoxan reversed the effects of DEX. These results suggest that the renoprotective effects of DEX are mediated via α2-AR and I 2 R-dependent pathways that reduce inflammation and oxidative stress through GSK-3β/Nrf2 signaling.
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Affiliation(s)
- Xiujing Feng
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Wei Guan
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Yuan Zhao
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Chaoran Wang
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Manyu Song
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Yujie Yao
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Tianyuan Yang
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
| | - Honggang Fan
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, People's Republic of China
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Yao Y, Liu T, Wang X, Zhang D. The Contrary Effects of Sirt1 on MCF7 Cells Depend on CD36 Expression Level. J Surg Res 2019; 238:248-254. [PMID: 30826489 DOI: 10.1016/j.jss.2019.01.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 11/16/2018] [Accepted: 01/17/2019] [Indexed: 11/30/2022]
Abstract
BACKGROUND Breast cancer is one of the most aggressive and pervasive cancers identified in females. Sirt1 and CD36 both exert an essential role toward the oncogenic signaling in breast cancer cells. As reported, the adrenergic signaling could promote the malignancy of breast cancer. This study focuses specifically on the role of Sirt1/CD36 in the proliferation of MCF-7 breast cancer cells and also investigates their response to the α2-adrenergic agonist dexmedetomidine (Dex). MATERIALS AND METHODS Expression of Sirt1 and CD36 was measured in breast cancer tissue by immunohistochemistry. We cultured MCF7 cells and treated cells with resveratrol (RSV) or Dex. Western blot analysis was performed to quantify the protein expression levels. The methyl thiazolyl tetrazolium (MTT) assay was applied to detect cell proliferation. RESULTS Compared with normal adjacent tissues, Sirt1 increased and CD36 decreased in cancer tissues. RSV, a Sirt1 activator, increased the proliferation of MCF-7 cells at low concentration but exerted cytotoxicity effect at higher concentration. Sirt1 activation increased the expression of CD36 at higher concentration. Dex treatment gradually increased the proliferation of MCF7 cells in a dose-dependent manner and downregulated the expression of Sirt1/CD36. Interestingly, overexpression of Sirt1 via RSV pretreatment could suppress Dex-stimulated proliferation of breast cancer, accompanied with CD36 upregulation. CONCLUSIONS though expression of Sirt1 increased in breast cancer progression, overexpression of Sirt1 could inhibit MCF7 proliferation, which may be associated with CD36 upregulation. In addition, the promotion effect of Dex on MCF7 cells, which may be associated with the Sirt1/CD36 inhibition, could be weakened by Sirt1 activation via RSV.
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Affiliation(s)
- Yiqun Yao
- Department of Thyroid and Breast Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Tao Liu
- Department of Thyroid and Breast Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Xiaolan Wang
- Department of Thyroid and Breast Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Dianlong Zhang
- Department of Thyroid and Breast Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China.
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Sun YB, Zhao H, Mu DL, Zhang W, Cui J, Wu L, Alam A, Wang DX, Ma D. Dexmedetomidine inhibits astrocyte pyroptosis and subsequently protects the brain in in vitro and in vivo models of sepsis. Cell Death Dis 2019; 10:167. [PMID: 30778043 PMCID: PMC6379430 DOI: 10.1038/s41419-019-1416-5] [Citation(s) in RCA: 106] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 01/30/2019] [Accepted: 02/01/2019] [Indexed: 12/12/2022]
Abstract
Sepsis is life-threatening and often leads to acute brain damage. Dexmedetomidine, an α2-adrenoceptor agonist, has been reported to possess neuroprotective effects against various brain injury but underlying mechanisms remain elusive. In this study, in vitro and in vivo models of sepsis were used to explore the effects of dexmedetomidine on the inflammasome activity and its associated glia pyroptosis and neuronal death. In vitro, inflammasome activation and pyroptosis were found in astrocytes following lipopolysaccharide (LPS) exposure. Dexmedetomidine significantly alleviated astrocyte pyroptosis and inhibited histone release induced by LPS. In vivo, LPS treatment in rats promoted caspase-1 immunoreactivity in astrocytes and caused an increase in the release of pro-inflammatory cytokines of IL-1β and IL-18, resulting in neuronal injury, which was attenuated by dexmedetomidine; this neuroprotective effect was abolished by α2-adrenoceptor antagonist atipamezole. Dexmedetomidine significantly reduced the high mortality rate caused by LPS challenge. Our data demonstrated that dexmedetomidine may protect glia cells via reducing pyroptosis and subsequently protect neurons, all of which may preserve brain function and ultimately improve the outcome in sepsis.
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Affiliation(s)
- Yi-Bing Sun
- Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Hailin Zhao
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - Dong-Liang Mu
- Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China
| | - Wenwen Zhang
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK.,Department of Obstetrics and Gynecology, the Second Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang Province, China
| | - Jiang Cui
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - Lingzhi Wu
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - Azeem Alam
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK
| | - Dong-Xin Wang
- Department of Anesthesiology and Critical Care Medicine, Peking University First Hospital, Beijing, China.
| | - Daqing Ma
- Anaesthetics, Pain Medicine and Intensive Care, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, Chelsea and Westminster Hospital, London, UK.
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Sha J, Zhang H, Zhao Y, Feng X, Hu X, Wang C, Song M, Fan H. Dexmedetomidine attenuates lipopolysaccharide-induced liver oxidative stress and cell apoptosis in rats by increasing GSK-3β/MKP-1/Nrf2 pathway activity via the α2 adrenergic receptor. Toxicol Appl Pharmacol 2019; 364:144-152. [DOI: 10.1016/j.taap.2018.12.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 12/19/2018] [Accepted: 12/24/2018] [Indexed: 12/28/2022]
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Sha J, Feng X, Chen Y, Zhang H, Li B, Hu X, Fan H. Dexmedetomidine improves acute stress‐induced liver injury in rats by regulating MKP‐1, inhibiting NF‐κB pathway and cell apoptosis. J Cell Physiol 2019; 234:14068-14078. [DOI: 10.1002/jcp.28096] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 12/07/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Jichen Sha
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Xiujing Feng
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Yongping Chen
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Huayun Zhang
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Bei Li
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Xueyuan Hu
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
| | - Honggang Fan
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine College of Veterinary Medicine Northeast Agricultural University Harbin Heilongjiang China
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Si Y, Bao H, Han L, Chen L, Zeng L, Jing L, Xing Y, Geng Y. Dexmedetomidine attenuation of renal ischaemia-reperfusion injury requires sirtuin 3 activation. Br J Anaesth 2018; 121:1260-1271. [PMID: 30442253 DOI: 10.1016/j.bja.2018.07.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Revised: 06/20/2018] [Accepted: 07/12/2018] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Dexmedetomidine attenuates renal ischaemia and reperfusion (I/R) injury, but its mechanism of action is unclear. As sirtuin 3 (SIRT3) activation can alleviate acute kidney injury, we investigated whether dexmedetomidine acts through SIRT3 to reduce renal I/R injury. METHODS The potential involvement of SIRT3 in dexmedetomidine attenuation of renal I/R injury was tested in HK2 cells subjected to hypoxia/reoxygenation and C57BL/6J mice subjected to renal I/R. A short interfering RNA targeting SIRT3 was used in some experiments to examine the potential role of SIRT3. Cell death and mitochondrial membrane potential (Δψm) were analysed in cultured cells. Mitochondrial damage in mice was assessed using electron microscopy and markers for renal function. Expression of cyclophilin D, cytochrome c, and SIRT3, and the level of cyclophilin D acetylation were determined. RESULTS Hypoxia/reoxygenation of HK2 cells increased cell death, cytochrome C expression, and cyclophilin D acetylation, and decreased Δψm and SIRT3 expression (P<0.05). Dexmedetomidine attenuated these changes. The dexmedetomidine effects were enhanced by SIRT3 overexpression and eliminated by SIRT3 knockdown. I/R in mice damaged renal function, and increased histological lesions, mitochondrial damage, cytochrome c expression, and cyclophilin D acetylation, while SIRT3 activity was decreased by 51% (P<0.05). Dexmedetomidine inhibited these changes in mice expressing normal levels of SIRT3, but not in SIRT3-knockdown mice. CONCLUSIONS Dexmedetomidine appears to act, at least in part, by up-regulating SIRT3 to inhibit mitochondrial damage and cell apoptosis and thereby protect against renal I/R injury.
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Affiliation(s)
- Y Si
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - H Bao
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China.
| | - L Han
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - L Chen
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - L Zeng
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - L Jing
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
| | - Y Xing
- Mechanical Engineering, Southeast University, Nanjing, People's Republic of China
| | - Y Geng
- Department of Anaesthesiology, Nanjing First Hospital, Nanjing Medical University, Nanjing, People's Republic of China
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Dexmedetomidine Protects Against Chemical Hypoxia-Induced Neurotoxicity in Differentiated PC12 Cells Via Inhibition of NADPH Oxidase 2-Mediated Oxidative Stress. Neurotox Res 2018; 35:139-149. [PMID: 30112693 DOI: 10.1007/s12640-018-9938-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 07/16/2018] [Accepted: 07/26/2018] [Indexed: 12/17/2022]
Abstract
Dexmedetomidine (Dex) is a widely used sedative in anesthesia and critical care units, and it exhibits neuroprotective activity. However, the precise mechanism of Dex-exerted neuroprotection is not clear. Increased neuronal NADPH oxidase 2 (NOX2) contributes to oxidative stress and neuronal damage in various hypoxia-related neurodegenerative disorders. The present study investigated whether Dex regulated neuronal NOX2 to exert its protective effects under hypoxic conditions. Well-differentiated PC12 cells were exposed to cobalt chloride (CoCl2) to mimic a neuronal model of chemical hypoxia-mediated neurotoxicity. The data showed that Dex pretreatment of PC12 cells significantly suppressed CoCl2-induced neurotoxicity, as evidenced by the enhanced cell viability, restoration of cellular morphology, and reduction in apoptotic cells. Dex improved mitochondrial function and inhibited CoCl2-induced mitochondrial apoptotic pathways. We further demonstrated that Dex attenuated oxidative stress, downregulated NOX2 protein expression and activity, and inhibited intracellular calcium ([Ca2+]i) overload in CoCl2-treated PC12 cells. Moreover, knockdown of the NOX2 gene markedly improved mitochondrial function and attenuated apoptosis under hypoxic conditions. These results demonstrated that the protective effects of Dex against hypoxia-induced neurotoxicity in neural cells were mediated, at least partially, via inhibition of NOX2-mediated oxidative stress.
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Zhou Z, Chen Q, Wan L, Zheng D, Li Z, Wu Z. Dexmedetomidine protects hepatic cells against oxygen-glucose deprivation/reperfusion injury via lncRNA CCAT1. Cell Biol Int 2018; 42:1250-1258. [PMID: 29851220 DOI: 10.1002/cbin.10996] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 05/27/2018] [Indexed: 12/26/2022]
Affiliation(s)
- Zhuang Zhou
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
| | - Qingsong Chen
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
| | - Lei Wan
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
| | - Daofeng Zheng
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
| | - Zhongtang Li
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
| | - Zhongjun Wu
- Department of Hepatobillary Surgery; The First Affiliated Hospital of Chongqing Medical University; No.1 Youyi Road Yuzhong District Chongqing P.R. China
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Yanling Q, Xiaoning C, Fei B, Liyun F, Huizhong H, Daqing S. Inhibition of NLRP9b attenuates acute lung injury through suppressing inflammation, apoptosis and oxidative stress in murine and cell models. Biochem Biophys Res Commun 2018; 503:436-443. [PMID: 29655793 DOI: 10.1016/j.bbrc.2018.04.079] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Accepted: 04/09/2018] [Indexed: 02/07/2023]
Abstract
Acute lung injury (ALI), known a severe disease along with high morbidity and mortality, is lacking of specific therapies. Inflammation, apoptosis and oxidative stress are critical pathologies that contribute to ALI. Recently, there is study indicated that NLRP9b, a NOD-like receptor (NLR) member, is critical in modulation of inflammatory response. However, the effects of NLRP9b on sepsis-associated ALI, and the underlying molecular mechanism have not been understood. In the present study, the wild type (WT) and NLRP9b-knockout (NLRP9b-/-) mice with C57B/L6 background were subjected to a cecal ligation and puncture (CLP) for ALI murine model establishment. The findings indicated that NLRP9b-/- improved the survival rate of CLP-induced ALI mice, and inhibited pulmonary histopathological alterations, inflammation, and apoptosis. NLRP9b-/- reduced the activation of inhibitor of κBα/nuclear factor kappa B (IκBα/NF-κB), apoptosis-associated speck-like protein containing a Caspase-recruitment domain (ASC)/Casapse-1 and Caspase-3/poly (ADP-ribose) polymerase (PARP) signaling pathways in CLP-challenged mice with ALI. In vitro, mouse epithelial cells (MLE-12) were incubated with lipopolysaccharide (LPS) or recombinant NLRP9b caused a significant increased of pro-inflammatory cytokines or chemokine, and reactive oxygen species (ROS) generation; however, these changes were markedly alleviated by NLRP9-knockdown using its specific siRNA sequence. Pre-treatment of MLE-12 cells with ROS scavenger of N-acetylcysteine (NAC) remarkably decreased lipopolysaccharide (LPS)- and rMuNLRP9-induced production of ROS, and the secretion of inflammatory cytokines or chemokine, as well as the activity of IκBα/NF-κB, ASC/Casapse-1 and Caspase-3/PARP signaling pathways. Together, the findings here suggested that NLRP9b played an essential role in lung inflammation, apoptosis and oxidative stress of sepsis-induced ALI animal model or in LPS-induced MLE-12 cells, providing that NLRP9b inhibition might be a potential therapeutic option for ALI.
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Affiliation(s)
- Qiu Yanling
- Department of Pediatric, Baoji Maternal and Child Health Hospital, Baoji City 721000, Shaanxi, China
| | - Cheng Xiaoning
- Department of Pediatric, The Second Affiliated Hospital, Shaanxi University of Traditional Chinese Medicine, Shanxi 712000, China
| | - Bai Fei
- Department of Child Healthcare, Northwest Women and Children Hospital, Xi'an, Shaanxi 710061, China
| | - Fang Liyun
- Department of Pediatric, Xi'an NO.3 Hospital, Xi'an, Shaanxi 710018, China
| | - Hu Huizhong
- Department of Pediatric, Xi'an NO.3 Hospital, Xi'an, Shaanxi 710018, China
| | - Sun Daqing
- Department of Pediatric, Xi'an NO.3 Hospital, Xi'an, Shaanxi 710018, China.
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Neuroprotective potential of glibenclamide is mediated by antioxidant and anti-apoptotic pathways in intracerebral hemorrhage. Brain Res Bull 2018; 142:18-24. [PMID: 29933037 DOI: 10.1016/j.brainresbull.2018.06.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 06/04/2018] [Accepted: 06/14/2018] [Indexed: 12/17/2022]
Abstract
The sulfonylurea receptor 1 (SUR1)-regulated NCca-ATP channels were progressively upregulated and demonstrated unchecked opening in central nervous system (CNS) injury, which induced cerebral damage. Glibenclamide (GLI) can block NCca-ATP channels and consequently exert protective effects. Recent studies have found that GLI has antioxidative effects. In this study, we primarily explored the antioxidative effects of GLI in a rat model of intracerebral hemorrhage (ICH). We found that GLI could scavenge free radicals, reduce activated-caspase-3 expression, increase the Bcl-2/Bax ratio, inhibit apoptosis, and improve functional neurological outcomes in a rat model of ICH.
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Yan X, Cheng X, Zhou L, He X, Zheng W, Chen H. Dexmedetomidine alleviates lipopolysaccharide-induced lung injury in Wistar rats. Oncotarget 2018; 8:44410-44417. [PMID: 28574842 PMCID: PMC5546489 DOI: 10.18632/oncotarget.17899] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Accepted: 04/27/2017] [Indexed: 12/17/2022] Open
Abstract
This study aimed to investigate the protective effects of dexmedetomidine on lipopolysaccharide (LPS)-induced lung injury in Wistar rats. 24 female Wistar rats were randomly assigned into 3 groups (n = 8): a control group, a LPS-challenged group, and a LPS plus dexmedetomidine group. Inflammation, oxidative stress, Nrf2/Keap1, and Akt signal were determined. The results showed that LPS caused inflammation and oxidative stress via increasing pro-inflammatory cytokines and oxidative products. Dexmedetomidine treatment alleviated inflammation and oxidative stress in LPS-challenged rats. Nrf2/Keap1 was inhibited and Akt signal was activated in the lung after exposure to LPS, while dexmedetomidine activated Nrf2/Keap1, which further mediated expressions of antioxidant genes. In conclusion, dexmedetomidine alleviated inflammatory response and oxidative stress in LPS-induced lung injury in rats via influencing Nrf2/Keap1 signal.
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Affiliation(s)
- Xuetao Yan
- Department of Anesthesiology, Shenzhen Bao'an Maternity and Child Health Hospital, Shenzhen, 518100, China
| | - Xiaoli Cheng
- Department of Pharmacy, Shenzhen Bao'an Maternity and Child Health Hospital, Shenzhen, 518100, China
| | - Liwen Zhou
- Department of Anesthesiology, Xiangyang Central Hospital, Xiangyang, 441021, China
| | - Xianghu He
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Wuhan, 430071, China
| | - Wenzhong Zheng
- Department of Anesthesiology, Shenzhen Bao'an Maternity and Child Health Hospital, Shenzhen, 518100, China
| | - Hu Chen
- Department of Anesthesiology, Shenzhen Bao'an Maternity and Child Health Hospital, Shenzhen, 518100, China
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Güzel A, Doğan E, Türkçü G, Kuyumcu M, Kaplan İ, Çelik F, Yıldırım ZB. Dexmedetomidine and Magnesium Sulfate: A Good Combination Treatment for Acute Lung Injury? J INVEST SURG 2018; 32:331-342. [PMID: 29359990 DOI: 10.1080/08941939.2017.1422575] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Objectives: In this study, we aimed to investigate the therapeutic effects of magnesium sulfate (MgSO4) and dexmedetomidine (dex) in a model of acute lung injury (ALI). We determined whether concomitant administration decreased the inflammatory effects of hydrochloric acid (HCl)-induced ALI in a synergistic manner. Materials and Methods: In this study, 42 Sprague-Dawley rats were randomized into six groups: Group S (saline), Group SV (saline + mechanical ventilation), Group HCl (HCl), Group Dex (Dex), Group Mag (MgSO4), and Group DM (Dex + MgSO4). All groups except Group S were mechanically ventilated prior to HCl-induced ALI. Saline or HCl was administered via tracheostomy. Prior to treatment, HCl was administered to Group HCl, Group Dex, Group Mag, and Group DM to induce ALI. Dex and MgSO4 were administered intraperitoneally. The rats were monitored for 4 h after treatment to measure oxidative stress parameters in blood, and prolidase enzyme activity. Lung tissue damage were determined via histopathology. Results: A significant increase in heart rate and rapid desaturation was observed in HCl-administered groups. Treatment administration decreased the pulse values. Increased saturation values and decreased oxidative stress indices were observed in groups that were subsequently administered Dex and MgSO4. Serum prolidase activity increased significantly in Group HCl. Severe pathological findings were detected following HCl-induced ALI. Group Mag showed greater improvement in the pathology of HCl-induced ALI than did Group Dex. Administration of both Dex and MgSO4 did not improve the pathological scores. Conclusions: The antioxidant and anti-inflammatory effects of Dex and MgSO4 ameliorated the detrimental effects of HCI-induced ALI. However, adverse effects on hemodynamics and lung damage were observed when the two drugs were administered together.
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Affiliation(s)
- Abdulmenap Güzel
- a Department of Anesthesiology , Dicle University , Diyarbakır , Turkey
| | - Erdal Doğan
- a Department of Anesthesiology , Dicle University , Diyarbakır , Turkey
| | - Gül Türkçü
- b Department of Pathology , Dicle University , Diyarbakır , Turkey
| | - Mahir Kuyumcu
- a Department of Anesthesiology , Dicle University , Diyarbakır , Turkey
| | - İbrahim Kaplan
- c Department of Biochemistry , Dicle University , Diyarbakır , Turkey
| | - Feyzi Çelik
- a Department of Anesthesiology , Dicle University , Diyarbakır , Turkey
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Dexmedetomidine mitigate acute lung injury by inhibiting IL-17-induced inflammatory reaction. Immunobiology 2018; 223:32-37. [DOI: 10.1016/j.imbio.2017.10.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 06/02/2017] [Accepted: 10/03/2017] [Indexed: 12/20/2022]
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