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Sadeghloo Z, Nabavi-Rad A, Zali MR, Klionsky DJ, Yadegar A. The interplay between probiotics and host autophagy: mechanisms of action and emerging insights. Autophagy 2024:1-23. [PMID: 39291740 DOI: 10.1080/15548627.2024.2403277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 07/09/2024] [Accepted: 07/10/2024] [Indexed: 09/19/2024] Open
Abstract
Autophagy, a lysosome-dependent protein degradation mechanism, is a highly conserved catabolic process seen in all eukaryotes. This cell protection system, which is present in all tissues and functions at a basic level, can be up- or downregulated in response to various stresses. A disruption in the natural route of the autophagy process is frequently followed by an interruption in the inherent operation of the body's cells and organs. Probiotics are live bacteria that protect the host through various mechanisms. One of the processes through which probiotics exert their beneficial effects on various cells and tissues is autophagy. Autophagy can assist in maintaining host homeostasis by stimulating the immune system and affecting numerous physiological and pathological responses. In this review, we particularly focus on autophagy impairments occurring in several human illnesses and investigate how probiotics affect the autophagy process under various circumstances.Abbreviation: AD: Alzheimer disease; AKT: AKT serine/threonine kinase; AMPK: 5'AMP-activated protein kinase; ATG: autophagy related; CCl4: carbon tetrachloride; CFS: cell-free supernatant; CMA: chaperone-mediated autophagy; CRC: colorectal cancer; EPS: L. plantarum H31 exopolysaccharide; HD: Huntington disease; HFD: high-fat diet; HPV: human papillomavirus; IFNG/IFN-γ: interferon gamma; IL6: interleukin 6; LGG: L. rhamnosus GG; LPS: lipopolysaccharide; MTOR: mechanistic target of rapamycin kinase; MTORC1: MTOR complex 1; NAFLD: non-alcoholic fatty liver disease; NASH: non-alcoholic steatohepatitis; PD: Parkinson disease; Pg3G: pelargonidin-3-O-glucoside; PI3K: phosphoinositide 3-kinase; PolyQ: polyglutamine; ROS: reactive oxygen species; SCFAs: short-chain fatty acids; SLAB51: a novel formulation of lactic acid bacteria and bifidobacteria; Slp: surface layer protein (of acidophilus NCFM); SNCA: synuclein alpha; ULK1: unc-51 like autophagy-activating kinase 1; YB: B. longum subsp. infantis YB0411; YFP: yeast fermentate prebiotic.
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Affiliation(s)
- Zahra Sadeghloo
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Nabavi-Rad
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Daniel J Klionsky
- Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA
- Department of Molecular, Cellular and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Abbas Yadegar
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Yi S, Tao X, Wang Y, Cao Q, Zhou Z, Wang S. Effects of propofol on macrophage activation and function in diseases. Front Pharmacol 2022; 13:964771. [PMID: 36059940 PMCID: PMC9428246 DOI: 10.3389/fphar.2022.964771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 07/11/2022] [Indexed: 11/24/2022] Open
Abstract
Macrophages work with monocytes and dendritic cells to form a monocyte immune system, which constitutes a powerful cornerstone of the immune system with their powerful antigen presentation and phagocytosis. Macrophages play an essential role in infection, inflammation, tumors and other pathological conditions, but these cells also have non-immune functions, such as regulating lipid metabolism and maintaining homeostasis. Propofol is a commonly used intravenous anesthetic in the clinic. Propofol has sedative, hypnotic, anti-inflammatory and anti-oxidation effects, and it participates in the body’s immunity. The regulation of propofol on immune cells, especially macrophages, has a profound effect on the occurrence and development of human diseases. We summarized the effects of propofol on macrophage migration, recruitment, differentiation, polarization, and pyroptosis, and the regulation of these propofol-regulated macrophage functions in inflammation, infection, tumor, and organ reperfusion injury. The influence of propofol on pathology and prognosis via macrophage regulation is also discussed. A better understanding of the effects of propofol on macrophage activation and function in human diseases will provide a new strategy for the application of clinical narcotic drugs and the treatment of diseases.
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Affiliation(s)
- Shuyuan Yi
- School of Anesthesiology, Weifang Medical University, Weifang, China
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
- Qingdao Central Hospital, Central Hospital Affiliated to Qingdao University, Qingdao, China
| | - Xinyi Tao
- Qingdao Central Hospital, Central Hospital Affiliated to Qingdao University, Qingdao, China
| | - Yin Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Qianqian Cao
- Qingdao Central Hospital, Central Hospital Affiliated to Qingdao University, Qingdao, China
| | - Zhixia Zhou
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
- *Correspondence: Zhixia Zhou, ; Shoushi Wang,
| | - Shoushi Wang
- Qingdao Central Hospital, Central Hospital Affiliated to Qingdao University, Qingdao, China
- *Correspondence: Zhixia Zhou, ; Shoushi Wang,
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Chen MS, Tung YW, Hu CL, Chang HJ, Lin WC, Sheu SM. Three Lipid Emulsions Reduce Staphylococcus aureus-Stimulated Phagocytosis in Mouse RAW264.7 Cells. Microorganisms 2021; 9:microorganisms9122479. [PMID: 34946079 PMCID: PMC8703492 DOI: 10.3390/microorganisms9122479] [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: 10/07/2021] [Revised: 11/16/2021] [Accepted: 11/25/2021] [Indexed: 11/21/2022] Open
Abstract
Soybean oil (SO)-, SO medium-chain triglyceride (MCT)-, olive oil (OO)-, and fish oil (FO)-based lipid emulsions are generally applied in clinical practice via intravenous injection for patients with nutritional requirements. The function of lipid emulsions on immune modulation remains inconsistent, and their effects on macrophages are limited. In the present study, we used a model of S. aureus-infected mouse RAW264.7 macrophages to determine the influence of three different compositions of lipid emulsions (Lipofundin, ClinOleic, and Omegaven) on reactive oxygen species (ROS) production, phagocytosis, and bacterial survival. The three individual lipid emulsions similarly enhanced bacterial survival but reduced S. aureus-stimulated ROS, phagocytosis of S. aureus bioparticles conjugate, polymerization of F-actin, and phosphorylation of AKT, JNK, and ERK. Compared with the JNK and ERK inhibitors, the PI3K inhibitor markedly suppressed the phagocytosis of S. aureus bioparticles conjugate and the polymerization of F-actin, whereas it significantly increased the bacterial survival. These results suggest that the three lipid emulsions diminished ROS production and phagocytosis, resulting in increased bacterial survival. PI3K predominantly mediated the inhibitory effects of the lipid emulsions on the phagocytosis of mouse RAW264.7 macrophages.
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Affiliation(s)
- Ming-Shan Chen
- Department of Anesthetics, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (M.-S.C.); (Y.-W.T.); (C.-L.H.)
- Department of Medical Laboratory Science and Biotechnology, Asia University, Taichung City 41354, Taiwan
| | - Yi-Wei Tung
- Department of Anesthetics, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (M.-S.C.); (Y.-W.T.); (C.-L.H.)
| | - Chia-Lin Hu
- Department of Anesthetics, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (M.-S.C.); (Y.-W.T.); (C.-L.H.)
| | - Hui-Ju Chang
- Department of Medical Research, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (H.-J.C.); (W.-C.L.)
| | - Wen-Chun Lin
- Department of Medical Research, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (H.-J.C.); (W.-C.L.)
| | - Shew-Meei Sheu
- Department of Medical Research, Ditmanson Medical Foundation, Chia-Yi Christian Hospital, Chia-Yi City 60002, Taiwan; (H.-J.C.); (W.-C.L.)
- Correspondence:
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Zhang Y, Wu Y, Xu D, Xiao P, Xie B, Huang H, Shang Y, Yuan S, Zhang J. Very-Short-Term Sleep Deprivation Slows Early Recovery of Lymphocytes in Septic Patients. Front Med (Lausanne) 2021; 8:656615. [PMID: 34109195 PMCID: PMC8180857 DOI: 10.3389/fmed.2021.656615] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 04/12/2021] [Indexed: 12/22/2022] Open
Abstract
Sleep plays an important role in immune function. However, the effects of very-short-term sleep deprivation on the early recovery of immune function after sepsis remain unclear. This study was conducted in the intensive care unit to investigate the effects of 2 consecutive days of sleep deprivation (SD) on lymphocyte recovery over the following few days in septic patients who were recovering from a critical illness. The patients' self-reports of sleep quality was assessed using the Richards–Campbell Sleep Questionnaire at 0 and 24 h after inclusion. The demographic, clinical, laboratory, treatment, and outcome data were collected and compared between the good sleep group and poor sleep group. We found that 2 consecutive days of SD decreased the absolute lymphocyte count (ALC) and ALC recovery at 3 days after SD. Furthermore, post-septic poor sleep decreased the plasma levels of atrial natriuretic peptide (ANP) immediately after 2 consecutive days of SD. The ANP levels at 24 h after inclusion were positively correlated with ALC recovery, the number of CD3+ T cells, or the number of CD3+ CD4+ cells in the peripheral blood on day 5 after inclusion. Our data suggested that very-short-term poor sleep quality could slow down lymphocyte recovery over the following few days in septic patients who were recovering from a critical illness. Our results underscore the significance of very-short-term SD on serious negative effects on the immune function. Therefore, it is suggested that continuous SD or several short-term SD with short intervals should be avoided in septic patients.
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Affiliation(s)
- Yujing Zhang
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Yuming Wu
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Dan Xu
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Ping Xiao
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Bing Xie
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Haiyan Huang
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - You Shang
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Shiying Yuan
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
| | - Jiancheng Zhang
- Department of Critical Care Medicine, Tongji Medical College, Union Hospital, Huazhong University of Science and Technology, Wuhan, China.,Tongji Medical College, Institute of Anesthesia and Critical Care Medicine, Union Hospital, Huazhong University of Science and Technology, Wuhan, China
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Cai X, Li Y, Zheng X, Hu R, Li Y, Xiao L, Wang Z. Propofol suppresses microglial phagocytosis through the downregulation of MFG-E8. J Neuroinflammation 2021; 18:18. [PMID: 33422097 PMCID: PMC7796553 DOI: 10.1186/s12974-020-02061-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 12/16/2020] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND Microglia are highly motile phagocytic cells in the healthy brain with surveillance and clearance functions. Although microglia have been shown to engulf cellular debris following brain insult, less is known about their phagocytic function in the absence of injury. Propofol can inhibit microglial activity, including phagocytosis. Milk fat globule epidermal growth factor 8 (MFG-E8), as a regulator of microglia, plays an essential role in the phagocytic process. However, whether MFG-E8 affects the alteration of phagocytosis by propofol remains unknown. METHODS Microglial BV2 cells were treated with propofol, with or without MFG-E8. Phagocytosis of latex beads was evaluated by flow cytometry and immunofluorescence. MFG-E8, p-AMPK, AMPK, p-Src, and Src levels were assessed by western blot analysis. Compound C (AMPK inhibitor) and dasatinib (Src inhibitor) were applied to determine the roles of AMPK and Src in microglial phagocytosis under propofol treatment. RESULTS The phagocytic ability of microglia was significantly decreased after propofol treatment for 4 h (P < 0.05). MFG-E8 production was inhibited by propofol in a concentration- and time-dependent manner (P < 0.05). Preadministration of MFG-E8 dose-dependently (from 10 to 100 ng/ml) reversed the suppression of phagocytosis by propofol (P < 0.05). Furthermore, the decline in p-AMPK and p-Src levels induced by propofol intervention was reversed by MFG-E8 activation (P < 0.05). Administration of compound C (AMPK inhibitor) and dasatinib (Src inhibitor) to microglia blocked the trend of enhanced phagocytosis induced by MFG-E8 (P < 0.05). CONCLUSIONS These findings reveal the intermediate role of MFG-E8 between propofol and microglial phagocytic activity. Moreover, MFG-E8 may reverse the suppression of phagocytosis induced by propofol through the regulation of the AMPK and Src signaling pathways.
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Affiliation(s)
- Xiaoying Cai
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Ying Li
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Xiaoyang Zheng
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Rong Hu
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Yingyuan Li
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China
| | - Liangcan Xiao
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China.
| | - Zhongxing Wang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58 Zhongshan 2nd Road, Guangzhou, 510080, Guangdong, People's Republic of China.
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Jia G, Liu X, Che N, Xia Y, Wang G, Xiong Z, Zhang H, Ai L. Human-origin Lactobacillus salivarius AR809 protects against immunosuppression in S. aureus-induced pharyngitis via Akt-mediated NF-κB and autophagy signaling pathways. Food Funct 2020; 11:270-284. [PMID: 31957758 DOI: 10.1039/c9fo02476j] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Lactobacillus salivarius AR809 is a newly discovered probiotic strain from a healthy human pharynx and has potential ability to adhere to the pharyngeal epithelium and inhibit Staphylococcus aureus (S. aureus)-induced inflammatory response. Pharyngeal spray administration of AR809 exhibited protective effects in a S. aureus-induced mouse model of pharyngitis. The inhibitory effect and underlying molecular mechanism of AR809 on S. aureus-stimulated pharyngitis were further investigated. AR809 significantly increased phagocytosis and bactericidal activity, reduced the production of inflammatory mediators (intracellular reactive oxygen species (ROS), prostaglandin E2 (PGE2), cyclooxygenase-2 (COX-2), nitric oxide (NO), inducible NOS (iNOS)) and the expression of inflammatory cytokines (tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β)), and induced macrophages to adopt the M2 phenotype. AR809 also attenuated S. aureus-induced phosphorylations of protein kinase B (Akt) and rapamycin (mTOR), and elevated the autophagic protein (light chain 3 from II (LC3-II) and Beclin-1) level. Furthermore, AR809 inhibited nuclear transcription factor kappa-B (NF-κB) activation by suppressing the nuclear translocation of NF-κB p65. Likewise, 740Y-P (a PI3K activator) decreased the anti-inflammatory effect of AR809 against S. aureus-induced inflammatory response, while AR809 treatments with wortmannin (a PI3K inhibitor) markedly reversed this inflammatory response. AR809 prevents S. aureus-induced pharyngeal inflammatory response, possibly by regulating TLR/PI3K/Akt/mTOR signalling pathway-related autophagy and TLR/PI3K/Akt/IκB/NF-κB pathway activity, and therefore has potential for use in preventing pharyngitis and other inflammatory diseases.
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Affiliation(s)
- Guochao Jia
- Shanghai Engineering Research Center of Food Microbiology, School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
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Chen MS, Lu PK, Lin WC, Shin HC, Sie SR, Sheu SM. Lipofundin Mediates the Major Inhibition of Intravenous Propofol in IL-1β Secretion and Phagocytosis of Staphylococcus aureus-Infected Macrophages. Lipids 2019; 55:45-52. [PMID: 31838756 DOI: 10.1002/lipd.12207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/23/2019] [Accepted: 11/21/2019] [Indexed: 01/26/2023]
Abstract
Lipofundin is the solvent for propofol in the intravenous injection of Propofol-Lipuro® and is used in patients who need intravenous feeding to provide fatty acids and fat for energy. In addition to propofol, Lipofundin also affects the immune modulation of phagocytes. In a previous study, we reported that intravenous propofol effectively decreased Staphylococcus aureus-stimulated reactive oxygen species (ROS) levels, IL-1β secretion, and phagocytosis in RAW264.7 macrophages. It is important to separately assess the effects of pure propofol, Lipofundin, and Propofol-Lipuro. By using an S. aureus-infected RAW264.7 macrophage model, the levels of secreted IL-1β in cell supernatants were determined by ELISA. IL-1β mRNA in cell pellets was further analyzed by quantitative polymerase chain reaction (qPCR), and Western blotting was performed to detect pro-IL-1β synthesis. Total ROS levels were determined by a luminol chemiluminescence assay. Compared with pure propofol, treatment with clinically relevant concentrations of Propofol-Lipuro and Lipofundin obviously reduced IL-1β secretion (>85% inhibition), S. aureus-stimulated ROS production (50% inhibition), and phagocytosis (>60% inhibition) to similar levels. Treatment with pure propofol alone significantly decreased IL-1β mRNA levels and pro-IL-1β protein synthesis, and slightly inhibited phagocytosis. In contrast, treatment with Propofol-Lipuro did not influence IL-1β mRNA or pro-IL-1β protein expression, even though treatment with Lipofundin increased the levels of both IL-1β mRNA and its precursor protein. In conclusion, IL-1β secretion is regulated at the posttranslational level. Lipofundin mediated the major effect of Propofol-Lipuro on the inhibition of IL-1β secretion, ROS production, and phagocytosis in S. aureus-infected RAW264.7 cells.
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Affiliation(s)
- Ming-Shan Chen
- Department of Anesthesiology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan.,Department of Biotechnology, Asia University, Taichung City, 41354, Taiwan
| | - Peh-Kuang Lu
- Department of Anesthesiology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan
| | - Wen-Chun Lin
- Department of Medical Research, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan
| | - Hsun-Chang Shin
- Department of Anesthesiology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan
| | - Shih-Ren Sie
- Department of Anesthesiology, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan
| | - Shew-Meei Sheu
- Department of Medical Research, Ditmanson Medical Foundation Chia-Yi Christian Hospital, Chia-Yi City, 60002, Taiwan
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Propofol specifically reduces PMA-induced neutrophil extracellular trap formation through inhibition of p-ERK and HOCl. Life Sci 2019; 221:178-186. [PMID: 30771312 DOI: 10.1016/j.lfs.2019.02.030] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 02/12/2019] [Accepted: 02/12/2019] [Indexed: 12/21/2022]
Abstract
Neutrophil extracellular traps (NETs) are net-like chromatin fibers that can trap and kill microorganisms. Although several anti-inflammatory effects of intravenous anesthetics have been reported, it has not been investigated whether intravenous anesthetics influence NET formation. AIMS To compare the effects of four intravenous anesthetics (propofol, thiamylal sodium, midazolam, and ketamine) on phorbol myristate acetate (PMA)-induced NET formation and analyze the associated signaling pathways. MATERIALS AND METHODS PMA-stimulated NETs formed in the absence or presence of intravenous anesthetics were stained with SYTOX Green and then quantified. Inhibitors were applied to investigate the related mechanism, which was confirmed by western blotting, and ROS were detected. KEY FINDINGS The neutrophils incubated with propofol showed the lowest degree of NET formation compared with those incubated with the other intravenous anesthetics. Propofol significantly reduced the level of myeloperoxidase (MPO)-derived HOCl but not that of superoxide. Aminopyrine, an MPO inhibitor, markedly decreased the number of PMA-induced NETs, indicating the involvement of HOCl in the inhibitory effect of propofol on NET formation. According to western blotting results, the level of p-ERK was reduced by propofol during PMA-induced NET formation. The ERK inhibitor PD98059 decreased NET formation but did not inhibit PMA-induced HOCl generation, and aminopyrine did not reduce ERK phosphorylation. SIGNIFICANCE Through this study, we define a new anti-inflammatory effect of intravenous anesthetics. Of the four intravenous anesthetics tested, propofol was the most potent inhibitor of NET formation. Moreover, propofol resulted in a decrease in PMA-induced NET formation by two independent mechanisms: inhibition of HOCl and p-ERK.
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