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Du L, Zhu L, Lu X, Yu Y, Liu P, Pan J. Inhibition of the MLCK/MLC2 pathway protects against intestinal heat stroke-induced injury in rats. J Therm Biol 2023; 116:103655. [PMID: 37506522 DOI: 10.1016/j.jtherbio.2023.103655] [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: 06/13/2022] [Revised: 06/08/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023]
Abstract
Intestinal barrier dysfunction often exists in the heat stroke (HS) pathological process, which increases intestinal permeability and induces endotoxemia. The upregulation of MLCK is a crucial player affecting intestinal permeability. This study aimed to explore whether inhibiting myosin light chain kinase (MLCK) can improve HS-induced intestinal injury in rats. Twelve-week-old Wistar male rats were divided into three groups: the control group, the HS model group, and the treatment group [HS model + ML-7 (MLCK inhibitor)]. HS impaired the tight junctions in the rat gut and increased permeability. Additionally, increased inflammatory factors in serum, activation of apoptosis, and downregulation of tight junction proteins were observed in intestinal cells. ML-7 significantly inhibited the MLCK/p-MLC2 signaling pathway, increased the expression of tight junction proteins, reduced intestinal permeability, reduced apoptosis and alleviated the intestinal damage caused by HS. ML-7 inhibited HS-induced apoptosis of intestinal epithelial cells by regulating the ERK/p38/HSP70 axis. Furthermore, inhibition of MLCK upregulated HSP70 expression through activation of the ERK pathway and inhibited cell apoptosis by abolishing the p38 MAPK pathway. In conclusion, inhibiting the MLCK/p-MLC2 signaling pathway reduces HS-induced intestinal permeability and protects the intestinal mucosal barrier.
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Affiliation(s)
- Liwen Du
- Department of Emergency, Ningbo No.2 Hospital, Ningbo, 315010, China
| | - Leilei Zhu
- Department of Emergency, Ningbo No.2 Hospital, Ningbo, 315010, China
| | - Xiaozhen Lu
- Department of Emergency, Ningbo No.2 Hospital, Ningbo, 315010, China
| | - Yuezhou Yu
- Department of Emergency, Ningbo No.2 Hospital, Ningbo, 315010, China
| | - Peng Liu
- Department of Emergency, Ningbo No.2 Hospital, Ningbo, 315010, China
| | - Jianneng Pan
- Department of Intensive Care Unit, Ningbo No.2 Hospital, Ningbo, 315010, China.
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Zheng Y, Xie T, Li S, Wang W, Wang Y, Cao Z, Yang H. Effects of Selenium as a Dietary Source on Performance, Inflammation, Cell Damage, and Reproduction of Livestock Induced by Heat Stress: A Review. Front Immunol 2022; 12:820853. [PMID: 35116042 PMCID: PMC8803637 DOI: 10.3389/fimmu.2021.820853] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/29/2021] [Indexed: 11/13/2022] Open
Abstract
Heat stress as a result of global warming has harmful consequences for livestock and is thus becoming an urgent issue for animal husbandry worldwide. Ruminants, growing pigs, and poultry are very susceptible to heat stress because of their fast growth, rapid metabolism, high production levels, and sensitivity to temperature. Heat stress compromises the efficiency of animal husbandry by affecting performance, gastrointestinal health, reproductive physiology, and causing cell damage. Selenium (Se) is an essential nutritional trace element for livestock production, which acts as a structural component in at least 25 selenoproteins (SELs); it is involved in thyroid hormone synthesis, and plays a key role in the antioxidant defense system. Dietary Se supplementation has been confirmed to support gastrointestinal health, production performance, and reproductive physiology under conditions of heat stress. The underlying mechanisms include the regulation of nutrient digestibility influenced by gastrointestinal microorganisms, antioxidant status, and immunocompetence. Moreover, heat stress damage to the gastrointestinal and mammary barrier is closely related to cell physiological functions, such as the fluidity and stability of cellular membranes, and the inhibition of receptors as well as transmembrane transport protein function. Se also plays an important role in inhibiting cell apoptosis and reducing cell inflammatory response induced by heat stress. This review highlights the progress of research regarding the dietary supplementation of Se in the mitigation of heat stress, addressing its mechanism and explaining the effect of Se on cell damage caused by heat stress, in order to provide a theoretical reference for the use of Se to mitigate heat stress in livestock.
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Affiliation(s)
| | | | - Shengli Li
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Wei Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China
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Fung AA, Zhou A, Vanos JK, Schmid-Schönbein GW. Enhanced intestinal permeability and intestinal co-morbidities in heat strain: A review and case for autodigestion. Temperature (Austin) 2021; 8:223-244. [PMID: 34527763 PMCID: PMC8436972 DOI: 10.1080/23328940.2021.1922261] [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: 02/02/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 11/05/2022] Open
Abstract
Enhanced intestinal permeability is a pervasive issue in modern medicine, with implications demonstrably associated with significant health consequences such as sepsis, multiorgan failure, and death. Key issues involve the trigger mechanisms that could compromise intestinal integrity and increase local permeability allowing the passage of larger, potentially dangerous molecules. Heat stress, whether exertional or environmental, may modulate intestinal permeability and begs interesting questions in the context of global climate change, increasing population vulnerabilities, and public health. Emerging evidence indicates that intestinal leakage of digestive enzymes and associated cell dysfunctions--a process referred to as autodigestion--may play a critical role in systemic physiological damage within the body. This increased permeability is exacerbated in the presence of elevated core temperatures. We employed Latent Dirichlet Allocation (LDA) topic modeling methods to analyze the relationship between heat stress and the nascent theory of autodigestion in a systematic, quantifiable, and unbiased manner. From a corpus of 11,233 scientific articles across four relevant scientific journals (Gut, Shock, Temperature, Gastroenterology), it was found that over 1,000 documents expressed a relationship between intestine, enhanced permeability, core temperature, and heat stress. The association has grown stronger in recent years, as heat stress and potential autodigestion are investigated in tandem, yet still by a limited number of specific research studies. Such findings justify the design of future studies to critically test novel interventions against digestive enzymes permeating the intestinal tract, especially the small intestine.
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Affiliation(s)
- Anthony A. Fung
- Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
| | - Andy Zhou
- Department of Bioengineering, University of California San Diego, La Jolla, CA, USA
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Koch F, Albrecht D, Görs S, Kuhla B. Jejunal mucosa proteomics unravel metabolic adaptive processes to mild chronic heat stress in dairy cows. Sci Rep 2021; 11:12484. [PMID: 34127774 PMCID: PMC8203643 DOI: 10.1038/s41598-021-92053-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/04/2021] [Indexed: 12/31/2022] Open
Abstract
Climate change affects the duration and intensity of heat waves during summer months and jeopardizes animal health and welfare. High ambient temperatures cause heat stress in dairy cows resulting in a reduction of milk yield, feed intake, and alterations in gut barrier function. The objectives of this study were to investigate the mucosal amino acid, glucose and lactate metabolism, as well as the proteomic response of the small intestine in heat stressed (HS) Holstein dairy cows. Cows of the HS group (n = 5) were exposed for 4 days to 28 °C (THI = 76) in a climate chamber. Percentage decrease in daily ad libitum intake of HS cows was calculated to provide isocaloric energy intake to pair-fed control cows kept at 15 °C (THI = 60) for 4 days. The metabolite, mRNA and proteomic analyses revealed that HS induced incorrect protein folding, cellular destabilization, increased proteolytic degradation and protein kinase inhibitor activity, reduced glycolysis, and activation of NF-κB signaling, uronate cycling, pentose phosphate pathway, fatty acid and amino acid catabolism, mitochondrial respiration, ATPase activity and the antioxidative defence system. Our results highlight adaptive metabolic and immune mechanisms attempting to maintain the biological function in the small intestine of heat-stressed dairy cows.
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Affiliation(s)
- Franziska Koch
- Institute of Nutritional Physiology "Oskar Kellner", Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Dirk Albrecht
- Institute of Microbiology, Ernst-Moritz-Arndt-University, Felix-Hausdorff-Straße 8, 17487, Greifswald, Germany
| | - Solvig Görs
- Institute of Nutritional Physiology "Oskar Kellner", Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Björn Kuhla
- Institute of Nutritional Physiology "Oskar Kellner", Leibniz Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
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Wang X, Yang X, Han F, Gao L, Zhou Y. Propofol improves brain injury induced by chronic cerebral hypoperfusion in rats. Food Sci Nutr 2021; 9:2801-2809. [PMID: 34136148 PMCID: PMC8194753 DOI: 10.1002/fsn3.1915] [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: 08/19/2020] [Accepted: 08/23/2020] [Indexed: 12/12/2022] Open
Abstract
To study effect of propofol on cognitive dysfunction and brain injury in a rat model of chronic cerebral hypoperfusion. The bilateral carotid artery ligation (bilateral common carotid artery occlusion and BCCAO) to establish rat model of chronic cerebral hypoperfusion and randomly assigned to 4 groups (n = 10): sham-operation group treated with saline model group, propofol treatment model group, normal saline treatment, propofol treatment in the sham-operation group; continuous intraperitoneal injection of propofol and saline for 12 weeks. Morris water maze was used to evaluate the learning and memory ability of rats. Determination of central cholinergic and oxidative stress in brain tissue by spectrophotometry. Detection of inflammatory response in brain tissue by immunohistochemistry and ELISA method. Detection of neuronal loss in brain tissue by Nissl and TUNEL staining. Compared with the saline-treated model group, propofol in model group significantly increased the rat brain tissue SOD activity (p < .01) and GPX activity (p < .01), decreased the MDA levels (p < .01) and protein carbonyl compound levels (p < .01). The propofol treatment of model group rats hippocampal GFAP-immunoreactive satellite glial cells (p < .01) and immune Iba1-positive microglia cells (p < .01) area percent compared to saline-treated model group decreased significantly. The number of normal propofol treatment of model group rats hippocampus neuron than in physiological saline treatment model group rats was significantly increased (p < .01). Propofol can improve chronic cerebral hypoperfusion in rats induced by cognitive dysfunction and brain damage.
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Affiliation(s)
- Xiaodong Wang
- Department of AnesthesiologyPeking University Hospital of StomatologyBeijingChina
| | - Xudong Yang
- Department of AnesthesiologyPeking University Hospital of StomatologyBeijingChina
| | - Fang Han
- Department of AnesthesiologyPeking University Hospital of StomatologyBeijingChina
| | - Ling Gao
- Department of AnesthesiologyPeking University Hospital of StomatologyBeijingChina
| | - Yi Zhou
- Department of AnesthesiologyPeking University Hospital of StomatologyBeijingChina
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Yang MM, Wang L, Zhang Y, Yuan R, Zhao Y, Hu J, Zhou FH, Kang HJ. Establishment and effectiveness evaluation of a scoring system for exertional heat stroke by retrospective analysis. Mil Med Res 2020; 7:40. [PMID: 32854781 PMCID: PMC7453553 DOI: 10.1186/s40779-020-00269-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 08/12/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Heat stroke (HS) is a serious, life-threatening disease. However, there is no scoring system for HS so far. This research is to establish a scoring system that can quantitatively assess the severity of exertional heat stroke (EHS). METHODS Data were collected from a total of 170 exertional heat stroke (EHS) patients between 2005 and 2016 from 52 hospitals in China. Univariate statistical methods and comparison of the area under the receiver operating characteristic (ROC) curve (AUC) were used to screen exertional heat stroke score (EHSS) parameters, including but not limited body temperature (T), Glasgow Coma Scale (GCS) and others. By comparing the sizes of the AUCs of the APACHE II, SOFA and EHSS assessments, the effectiveness of EHSS in evaluating the prognosis of EHS patients was verified. RESULTS Through screening with a series of methods, as described above, the present study determined 12 parameters - body temperature (T), GCS, pH, lactate (Lac), platelet count (PLT), prothrombin time (PT), fibrinogen (Fib), troponin I (TnI), aspartate aminotransferase (AST), total bilirubin (TBIL), creatinine (Cr) and acute gastrointestinal injury (AGI) classification - as EHSS parameters. It is a 0-47 point system designed to reflect increasing severity of heat stroke. Low (EHSS< 20) and high scores (EHSS> 35) showed 100% survival and 100% mortality, respectively. We found that AUCEHSS > AUCSOFA > AUCAPACHE II. CONCLUSION A total of 12 parameters - T, GCS, pH, Lac, PLT, PT, Fib, TnI, AST, TBIL, Cr and gastrointestinal AGI classification - are the EHSS parameters with the best effectiveness in evaluating the prognosis of EHS patients. As EHSS score increases, the mortality rate of EHS patients gradually increases.
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Affiliation(s)
- Meng-Meng Yang
- Department of Critical Care Medicine, The First Medical Centre, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China
| | - Lu Wang
- Medical School of Chinese PLA, Beijing, China
| | - Yu Zhang
- Medical School of Chinese PLA, Beijing, China
| | - Rui Yuan
- Medical School of Chinese PLA, Beijing, China
| | - Yan Zhao
- Department of Critical Care Medicine, The First Medical Centre, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China
| | - Jie Hu
- Department of Critical Care Medicine, The First Medical Centre, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China
| | - Fei-Hu Zhou
- Department of Critical Care Medicine, The First Medical Centre, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China
| | - Hong-Jun Kang
- Department of Critical Care Medicine, The First Medical Centre, Chinese PLA General Hospital, No. 28, Fuxing Road, Haidian District, Beijing, 100853, China.
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Ji X, Guo Y, Qiu Q, Wang Z, Wang Y, Ji J, Sun Q, Cai Y, Zhou G. [Molecular mechanism underlying the inhibitory effect of propofol on lipopolysaccharide-induced pyroptosis of mouse bone marrow-derived macrophages]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2020; 40:525-530. [PMID: 32895145 DOI: 10.12122/j.issn.1673-4254.2020.04.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE To investigate the molecular mechanism underlying the inhibitory effect of propofol on pyroptosis of macrophages. METHODS Macrophages derived from bone marrow were extracted and divided into three groups: control group, LPS+ATP group and propofol+LPS+ATP group. The control group was not given any treatment; LPS+ATP group was given LPS 1 μg/mL stimulation for 4 h, then ATP 4 mM stimulation for 1 h; Propofol+LPS+ATP group was given propofol+LPS 1 μg/mL stimulation for 4 h, then ATP stimulation for 1 h. After treatment, the supernatant and cells of cell culture were collected. the cell activity was detected by CCK8 and flow cytometry. The inflammatory cytokines IL-1βand IL-18 were detected by Elisa. Western blot was used to detect the expression of caspase-1 protein and TLR4 on cell membran Immunohistochemical fluorescence was used to detect apoptosis of cells. RESULTS LPS+ATP significantly decreased the viability of the macrophages and increased the cellular production of IL-1β and IL-18, activation of caspase-1 protein and the expression of TLR-4 on the cell membrane (P < 0.05). Treatment with propofol obviously reversed the changes induced by LPS+ATP. CONCLUSIONS LPS+ATP can induce pyroptosis of mouse bone marrow-derived macrophages, and propofol effectively inhibits such cell death, suggesting that propofol anesthesia is beneficial during operation and helps to regulate the immune function of in patients with sepsis.
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Affiliation(s)
- Xuexia Ji
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yuanbo Guo
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Qianqi Qiu
- Department of Anesthesiology, Guangzhou Women and Children's Medical Center, Guangzhou 510623, China
| | - Zhipeng Wang
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yan Wang
- Department of Science and Education, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Jinquan Ji
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Qiang Sun
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Yujing Cai
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
| | - Guobin Zhou
- Department of Anesthesiology, Guangdong Provincial People's Hospital/Guangdong Academy of Medical Sciences, Guangzhou 510080, China
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Wang K, Zhang H, Han Q, Lan J, Chen G, Cao G, Yang C. Effects of astragalus and ginseng polysaccharides on growth performance, immune function and intestinal barrier in weaned piglets challenged with lipopolysaccharide. J Anim Physiol Anim Nutr (Berl) 2019; 104:1096-1105. [PMID: 31724241 DOI: 10.1111/jpn.13244] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 09/07/2019] [Accepted: 09/25/2019] [Indexed: 12/23/2022]
Abstract
This experiment was conducted to evaluate the effects of astragalus polysaccharides (Aps) and ginseng polysaccharide (Gps) on growth performance, liver function, immune function, TLR4 signalling pathways and intestinal barrier in weaned piglets challenged with lipopolysaccharide (LPS). In an experiment spanning 28 days, 180 weaned piglets were randomly divided into three treatment groups: basal diet (Con), basal diet supplemented with 800 mg/kg Gps (Gps) and basal diet supplemented with 800 mg/kg Aps (Aps). At the end of the experiment, 12 piglets of each group were selected; half (n = 6) were intraperitoneally injected with LPS and half with normal saline. Dietary supplementation with Aps and Gps significantly increased (p < .05) the average daily gain and feed conversion rate. Lipopolysaccharide challenge increased (p < .05) expression of serum urea nitrogen (BUN), alanine aminotransferase (ALT), aspartate aminotransferase (AST), interleukin-1β (IL-1β) and tumour inflammatory factor-α (TNF-α), but decreased (p < .05) serum superoxide dismutase (SOD) level, total antioxidant capacity (T-AOC) and immunoglobulin A (IgA) expression. Lipopolysaccharide-challenged piglets fed with Aps or Gps had lower (p < .05) BUN, ALT, AST, IL-1β and TNF-α levels and greater (p < .05) SOD, T-AOC and IgA levels. Lipopolysaccharide challenge increased (p < .05) the expression of TLR4, MyD88 and NF-κB, and LPS-challenged piglets fed diets supplemented with Aps or Gps increased TLR4 and MyD88 and decreased NF-κB expression. Lipopolysaccharide challenge reduced (p < .05) the jejunal villus height, and piglets fed with Aps or Gps had increased (p < .05) jejunal villus height. Supplementation with Aps or Gps enhanced the expression of occludin and claudin in challenged or unchallenged piglets. In conclusion, dietary supplementation with Aps or Gps enhanced piglet growth performance, alleviated liver dysfunction and reduced immunological stress caused by LPS, as well as increased the intestinal barrier function.
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Affiliation(s)
- Kangli Wang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
| | - Haoran Zhang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
| | - Qianjie Han
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
| | - Junhong Lan
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
| | - Guangyong Chen
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
| | - Guangtian Cao
- College of Standardization, China Jiliang University, Hangzhou, China
| | - Caimei Yang
- Key Laboratory of Applied Technology on Green-Eco-Healthy Animal Husbandry of Zhejiang Province, The Zhejiang Provincial Engineering Laboratory for Animal Health and Internet Technology, College of Animal Science and Technology, Zhejiang A & F University, Hangzhou, China
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Ye N, Yu T, Guo H, Li J. Intestinal Injury in Heat Stroke. J Emerg Med 2019; 57:791-797. [PMID: 31708310 DOI: 10.1016/j.jemermed.2019.08.033] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 07/23/2019] [Accepted: 08/25/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND Heat stroke is a life-threatening syndrome that is characterized by its severe clinical symptoms, rapid progression, and high rate of mortality. Recently, research has indicated that a dysfunctional intestinal epithelia barrier plays an important role in the pathophysiology of heat stroke. Protecting the intestines from heat stress had been identified as a potentially effective treatment for patients with heat stroke and may reduce the innate immune response caused by endotoxins in circulation. OBJECTIVES The aim of this review is to discuss this key event in heat stroke and to describe the mechanism during progression. DISCUSSION Direct injuries and secondary impairments of the intestine induced by heat stress are discussed; recent studies that refer to intestine-specific prevention and treatment in heat stroke and heat stress-induced injuries are also summarized. CONCLUSIONS A more detailed pathogenesis of heat stroke needs to be elucidated so that potentially effective means of treatment and prevention of heat stroke can be developed and studied.
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Affiliation(s)
- Nan Ye
- Department of Military Biosafety, Army Medical University, Third Military Medical University, Chongqing, China
| | - Tiantian Yu
- Department of Military Biosafety, Army Medical University, Third Military Medical University, Chongqing, China
| | - Hongxia Guo
- Department of Military Biosafety, Army Medical University, Third Military Medical University, Chongqing, China
| | - Jintao Li
- Department of Military Biosafety, Army Medical University, Third Military Medical University, Chongqing, China
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The protective effect of selenium from heat stress-induced porcine small intestinal epithelial cell line (IPEC-J2) injury is associated with regulation expression of selenoproteins. Br J Nutr 2019; 122:1081-1090. [DOI: 10.1017/s0007114519001910] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AbstractThe present study compared the protective effect of sodium selenite (SS) and selenomethionine (SeMet) on heat stress (HS)-invoked porcine IPEC-J2 cellular damage and integrate potential roles of corresponding selenoprotein. Cells were cultured at 37°C until 80 % confluence and then subjected to four different conditions for 24 h: at 37°C (control), 41·5°C (HS), 41·5°C supplied with 0·42 µmol Se/L SS (SS), or SeMet (SeMet). HS significantly decreased cell viability, up-regulated mRNA and protein levels of heat shock protein 70 (HSP70) and down-regulated mRNA and protein levels of tight junction-related proteins (claudin-1 (CLDN-1) and zonula occludens-1 (ZO-1)). HS-induced cell injury was associated with the up-regulation (P < 0·05) of six inflammation-related genes and fourteen selenoprotein encoding genes and down-regulation (P < 0·05) of two inflammation-related genes and five selenoprotein encoding genes. Compared with the HS group, SS and SeMet supplementation resulted in an increase (P < 0·05) in cell viability, decreased (P < 0·05) mRNA expression of HSP70 and six inflammation-related genes and rescue (P < 0·05) of mRNA and protein levels of CLDN-1 and ZO-1. SS and SeMet supplementation changes the expressions of nineteen selenoprotein encoding genes in cells affected by HS. Both Se supplementation significantly recovered the protein level of glutathione peroxidase-1 and increased selenoprotein P in the IPEC-J2 cells under HS, respectively. In summary, Se supplementation alleviated the negative impact of HS on IPEC-J2 cells, and their cellular protective effect was associated with regulation expression of selenoproteins, and SeMet exhibited a better protective effect.
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11
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Xia B, Meng Q, Feng X, Tang X, Jia A, Feng J, Zhang S, Zhang H. Probing the molecular regulation of lipopolysaccharide stress in piglet liver by comparative proteomics analysis. Electrophoresis 2018; 39:2321-2331. [PMID: 29569248 DOI: 10.1002/elps.201700467] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 02/22/2018] [Accepted: 03/03/2018] [Indexed: 12/18/2022]
Abstract
Lipopolysaccharide (LPS) can induce inflammatory responses in piglets, causing immunological stress and tissue damage. However, chronic LPS infection may lead to LPS-induced immunological stress resistance. The molecular mechanisms underlying LPS stress have not been fully elucidated. Here, we conducted a global comparative proteomics analysis to investigate the molecular regulation of LPS stress using an immunological stress model of weaned piglets. A shotgun-based SWATH-MS workflow was used for global proteomes of the piglet livers after 15-day LPS treatment. Out of 3700 quantified proteins, 93 proteins showed differential changes under LPS stress. Bioinformatics analysis indicated that the differentially expressed proteins were mainly involved in inflammatory response, oxidation-redox processes and defense reactions, and were enriched in a phagosome pathway. Several key proteins associated with oxidative stress (SOD2), inflammation response (STEAP4 and S100 family) and the phagosome pathway were verified by activity and targeted-MS analyses. The observed responses appear to mitigate hepatic damage due to excessive oxidative stress, inflammation, and repression of the phagosome pathway. Our results reveal that an increased STEAP4 expression in piglets appears involved in cellular regulation by LPS stress and subsequent immunological stress resistance. This study sheds new light on the mechanism of prevention and relieving injury by LPS-induced immune responses.
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Affiliation(s)
- Bing Xia
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Qingshi Meng
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Xiaohui Feng
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Xiangfang Tang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Anfeng Jia
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Jinghai Feng
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
| | - Sheng Zhang
- Institute of Biotechnology, Cornell University, Ithaca, NY, USA
| | - Hongfu Zhang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, P. R. China
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Propofol Does Not Reduce Pyroptosis of Enterocytes and Intestinal Epithelial Injury After Lipopolysaccharide Challenge. Dig Dis Sci 2018; 63:81-91. [PMID: 29063417 DOI: 10.1007/s10620-017-4801-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 10/10/2017] [Indexed: 12/13/2022]
Abstract
BACKGROUND To date, mechanisms of sepsis-induced intestinal epithelial injury are not well known. P2X7 receptor (P2X7R) regulates pyroptosis of lymphocytes, and propofol is usually used for sedation in septic patients. AIMS We aimed to determine the occurrence of enterocyte pyroptosis mediated by P2X7R and to explore the effects of propofol on pyroptosis and intestinal epithelial injury after lipopolysaccharide (LPS) challenge. METHODS A novel regimen of LPS challenge was applied in vitro and in vivo. Inhibitors of P2X7R (A438079) and NLRP3 inflammasome (MCC950), and different doses of propofol were administered. The caspase-1 expression, caspase-3 expression, caspase-11 expression, P2X7R expression and NLRP3 expression, extracellular ATP concentration and YO-PRO-1 uptake, and cytotoxicity and HMGB1 concentration were detected to evaluate enterocyte pyroptosis in cultured cells and intestinal epithelial tissues. Chiu's score, diamine oxidase and villus length were used to evaluate intestinal epithelial injury. Moreover, survival analysis was performed. RESULTS LPS challenge activated caspase-11 expression and P2X7R expression, enhanced ATP concentration and YO-PRO-1 uptake, and led to increased cytotoxicity and HMGB1 concentration. Subsequently, LPS resulted in intestinal epithelial damage, as evidenced by increased levels of Chiu's score and diamine oxidase, and shorter villus length and high mortality of animals. A438079, but not MCC950, significantly relieved LPS-induced enterocyte pyroptosis and intestinal epithelial injury. Importantly, propofol did not confer the protective effects on enterocyte pyroptosis and intestinal epithelia although it markedly decreased P2X7R expression. CONCLUSION LPS attack leads to activation of caspase-11/P2X7R and pyroptosis of enterocytes. Propofol does not reduce LPS-induced pyroptosis and intestinal epithelial injury, although it inhibits P2X7R upregulation.
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Ji J, Gu Z, Li H, Su L, Liu Z. Cryptdin-2 predicts intestinal injury during heatstroke in mice. Int J Mol Med 2017; 41:137-146. [PMID: 29115396 PMCID: PMC5746321 DOI: 10.3892/ijmm.2017.3229] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 10/27/2017] [Indexed: 12/15/2022] Open
Abstract
Intestinal injury-induced bacterial translocation and endotoxemia are important in the pathophysiological process of heatstroke. However, the underlying mechanism remains to be fully elucidated. Previous studies using 2D-gel electrophoresis found that defensin-related cryptdin-2 (Cry-2), an intestinal α-defensin, is upregulated in intestinal tissues during heatstroke in mice, and that treatment with ulinastatin, a multivalent enzyme inhibitor, reduced heat-induced acute lung injury. To investigate the association between Cry-2 and heat stress (HS)-induced intestinal injury and the probable protective role of ulinastatin, the present study examined the intestinal expression of Cry-2 via histopathologic analysis and reverse transcription-quantitative polymerase chain reaction analysis in mice with heatstroke. The heat-stressed mice were exposed to different core temperatures and cooling treatments, and intestinal pathological changes and Chiu scores were determined. Chemical markers of intestinal injury, serum and intestinal concentrations of diamine oxidase (DAO) and D-lactic acid (D-Lac), and serum and intestinal concentrations of Cry-2 were also determined. Correlations were analyzed using Spearman's correlation analysis. It was found that HS upregulated the expression of Cry-2, and the serum and intestinal concentrations of Cry-2 were correlated with the severity of HS-induced intestinal damage, indicated by pathology scores and concentrations of DAO and D-lac. Ulinastatin protected the intestines from HS-induced injury and downregulated the expression of Cry-2, which was also correlated with the extent of intestinal injury. Therefore, ulinastatin administration may be beneficial for patients with heatstroke, and Cry-2 may be a novel predictor of HS-induced intestinal injury.
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Affiliation(s)
- Jingjing Ji
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
| | - Zhengtao Gu
- Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
| | - Hui Li
- Key Laboratory of Hot Zone Trauma Care and Tissue Repair of PLA, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
| | - Lei Su
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
| | - Zhifeng Liu
- Department of Critical Care Medicine, General Hospital of Guangzhou Military Command, Guangzhou, Guangdong 510010, P.R. China
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Li L, Tan H, Yang H, Li F, He X, Gu Z, Zhao M, Su L. Reactive oxygen species mediate heat stress-induced apoptosis via ERK dephosphorylation and Bcl-2 ubiquitination in human umbilical vein endothelial cells. Oncotarget 2017; 8:12902-12916. [PMID: 28038454 PMCID: PMC5355065 DOI: 10.18632/oncotarget.14186] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 12/05/2016] [Indexed: 12/25/2022] Open
Abstract
Heat stress can induce the mitochondrial apoptotic pathway in HUVEC cells, indicating that apoptosis may be a prominent pathological feature of heat stroke, however, little is known about the precise mechani sms involved in it. In this study, we describe the apoptotic effect of intense heat stress on HUVEC cells and our investigation of its underlying mechanisms. Treatment of cells with intense heat stress induced production of reactive oxygen species (ROS) and a concomitant increase in activation of the mitochondrial apoptotic pathway. Furthermore, by over-expression of MnSOD and GPx in cells, we show that ROS, and especially superoxide, is the primary oxidative species induced by intense heat stress and responsible for cell death. In addition, we explored the mechanism by which superoxide regulates the apoptotic effect of intense heat stress, and found that it involved Bcl-2 down-regulation through ubiquitin - proteasomal degradation. Superoxide production also led to Bcl-2 dephosphorylation through inactivation of MAP kinase ERK1/2, which promoted Bcl-2 ubiquitination. Taken together, these findings describe a novel pathway downstream of heat stress-induced apoptosis in HUVEC cells, and provide new insight into the process of redox-mediated down-regulation of Bcl-2 and apoptosis induction. These results could be important in the understanding of pathogenesis of heat stroke and for the development of preventive and treatment measures, both of which are currently lacking.
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Affiliation(s)
- Li Li
- Department of Intensive Care Unit, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, P.R. China.,Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Hongping Tan
- Department of Epilepsy Surgery, Guangdong Sanjiu Brain Hospital, Guangzhou 510510, P.R. China.,Southern Medical University, Guangzhou, 510515, China
| | - Hong Yang
- Department of Intensive Care Unit, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, P.R. China.,Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Feng Li
- Department of Intensive Care Unit, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, P.R. China.,Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Xuan He
- Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Zhengtao Gu
- Department of Intensive Care Unit, The Third Affiliated Hospital of Southern Medical University, Guangzhou 510630, P.R. China.,Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Ming Zhao
- Department of Pathophysiology, Southern Medical University, Guangdong Provincial Key Laboratory of Shock and Microcirculation Research, Guangzhou 510515, P.R. China
| | - Lei Su
- Southern Medical University, Guangzhou, 510515, China.,Department of Intensive Care Unit, Guangzhou General Hospital of Guangzhou Military Command, Guangzhou, P.R. China
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Tang SH, Wang HY, Sun H, An N, Xiao L, Sun Q, Zhao DB. Propofol inhibits carbachol-induced chloride secretion by directly targeting the basolateral K + channel in rat ileum epithelium. Neurogastroenterol Motil 2017; 29. [PMID: 27578144 DOI: 10.1111/nmo.12934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Accepted: 08/04/2016] [Indexed: 02/08/2023]
Abstract
BACKGROUND Propofol is a widely used intravenous general anesthetic. Acetylcholine (ACh) is critical in controlling epithelial ion transport. This study was to investigate the effects of propofol on ACh-evoked secretion in rat ileum epithelium. METHODS The Ussing chamber technique was used to investigate the effects of propofol on carbachol (CCh)-evoked short-circuit currents (Isc). KEY RESULTS Propofol (10-2 -10-6 mol/L) attenuated CCh-evoked Isc of rat ileum mucosa in a dose-dependent manner. The inhibitory effect of propofol was only evident after application to the serosal side. Pretreatment with tetrodotoxin (TTX, 0.3 μmol/L, n=5) had no effect on propofol-induced inhibitory effect, whereas serosal application of K+ channel inhibitor, glibenclamide, but not, an ATP-sensitive K+ channel inhibitor, largely reduced the inhibitory effect of propofol. In addition, pretreatment with either hexamethonium bromide (HB, nicotinic nACh receptor antagonist) or Cl- channel blockers niflumic acid and cystic fibrosis transmembrane conductance regulator (inh)-172 did not produce any effect on the propofol-induced inhibitory effect. CONCLUSIONS & INFERENCES Propofol inhibits CCh-induced intestinal secretion by directly targeting basolateral K+ channels.
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Affiliation(s)
- S-H Tang
- Department of Anesthesiology, Qilu Hospital, Shandong University, Jinan, China
| | - H-Y Wang
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - H Sun
- Department of Thoracic Surgery, Shandong Tumor Hospital, Shandong University, Jinan, China
| | - N An
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - L Xiao
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - Q Sun
- Department of Physiology, School of Medicine, Shandong University, Jinan, China
| | - D-B Zhao
- Department of Thoracic Surgery, Shandong Tumor Hospital, Shandong University, Jinan, China
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Cao L, Tang J, Li Q, Xu J, Jia G, Liu G, Chen X, Shang H, Cai J, Zhao H. Expression of Selenoprotein Genes Is Affected by Heat Stress in IPEC-J2 Cells. Biol Trace Elem Res 2016; 172:354-360. [PMID: 26706036 DOI: 10.1007/s12011-015-0604-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 12/18/2015] [Indexed: 12/12/2022]
Abstract
The aim of this study was to explore the impacts of heat stress (HS) on expressions of selenoprotein genes in IPEC-J2 cells. Cells were cultured with 5 % CO2-humidified chamber at 37 °C until the cells grew to complete confluence and then exposed to a mild hyperthermia at 41.5 °C (HS) or 37 °C (control) for another 24 h, finally harvested for total RNA or protein extraction. Real-time quantitative PCRs (qPCRs) were performed to compare gene expression of 25 selenoprotein genes, 3 tight junction-related genes, and 10 inflammation-related genes. Protein expressions of heat shock protein 70 (Hsp70) and selenoprotein X and P (SelX and SelP) were also investigated by Western blot. The results showed that HS up-regulated (P < 0.05) Hsp70 and one tight junction-related gene [zonula occludens-1 (Zo-1)] in IPEC-J2 cells. At the same time, HS up-regulated (P < 0.05) 4 selenoprotein genes (Gpx3, Dio2, Selk, Sels) and three inflammation-related genes (Il-6, Icam-1, Tgf-β) and down-regulated (P < 0.05 or as indicated) six selenoprotein genes (Gpx2, Gpx6, Txnrd1, Selh, Selm, Selx) and three inflammation-related genes (Ifn-β, Mcp-1, Tnf-α) in the cells. HS also exhibited impacts on protein expressions, which up-regulated Hsp70, down-regulated SelX, and showed no effect on SelP in IPEC-J2 cells. Our results showed that HS affected the expression of inflammation-related genes and up-regulated gene and protein expressions of Hsp70. The changes of so many selenoprotein genes expression implied a potential link between selenoprotein genes and HS. Moreover, the results provided by this IPEC-J2 model may be used to further study the interactive mechanisms between selenoprotein function and potential intestinal damage induced by HS.
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Affiliation(s)
- Lei Cao
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Jiayong Tang
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Qiang Li
- Sichuan Provincial General Station for Animal Husbandry, Chengdu, 610041, China
| | - Jingyang Xu
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Gang Jia
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Guangmang Liu
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Xiaoling Chen
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Haiying Shang
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Jingyi Cai
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China
| | - Hua Zhao
- Animal Nutrition Institute, Sichuan Agricultural University, No 211 Huimin Road, Chengdu, Sichuan, 611130, China.
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Derradjia A, Alanazi H, Park HJ, Djeribi R, Semlali A, Rouabhia M. α-tocopherol decreases interleukin-1β and -6 and increases human β-defensin-1 and -2 secretion in human gingival fibroblasts stimulated with Porphyromonas gingivalis
lipopolysaccharide. J Periodontal Res 2015. [DOI: 10.1111/jre.12308] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- A. Derradjia
- Groupe de Recherche en Écologie Buccale; Faculté de Médecine Dentaire; Université Laval; Québec QC Canada
- Groupe de Recherche sur les Biofilms et la Biocontamination des Matériaux; Faculté des Sciences; Université d'Annaba; Annaba Algeria
| | - H. Alanazi
- Groupe de Recherche en Écologie Buccale; Faculté de Médecine Dentaire; Université Laval; Québec QC Canada
| | - H. J. Park
- Groupe de Recherche en Écologie Buccale; Faculté de Médecine Dentaire; Université Laval; Québec QC Canada
| | - R. Djeribi
- Groupe de Recherche sur les Biofilms et la Biocontamination des Matériaux; Faculté des Sciences; Université d'Annaba; Annaba Algeria
| | - A. Semlali
- Department of Biochemistry; College of Science; King Saud University; Riyadh Saudi Arabia
| | - M. Rouabhia
- Groupe de Recherche en Écologie Buccale; Faculté de Médecine Dentaire; Université Laval; Québec QC Canada
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Suchecka D, Harasym J, Wilczak J, Gajewska M, Oczkowski M, Gudej S, Błaszczyk K, Kamola D, Filip R, Gromadzka-Ostrowska J. Antioxidative and anti-inflammatory effects of high beta-glucan concentration purified aqueous extract from oat in experimental model of LPS-induced chronic enteritis. J Funct Foods 2015. [DOI: 10.1016/j.jff.2014.12.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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19
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He S, Hou X, Xu X, Wan C, Yin P, Liu X, Chen Y, Shu B, Liu F, Xu J. Quantitative proteomic analysis reveals heat stress-induced injury in rat small intestine via activation of the MAPK and NF-κB signaling pathways. MOLECULAR BIOSYSTEMS 2015; 11:826-34. [DOI: 10.1039/c4mb00495g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We employed comparative proteomics to reveal a heat stress-induced injury mechanism in rat small intestine.
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20
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Chen J, Zhang R, Wang J, Yu P, Liu Q, Zeng D, Song H, Kuang Z. Protective effects of baicalin on LPS-induced injury in intestinal epithelial cells and intercellular tight junctions. Can J Physiol Pharmacol 2014; 93:233-7. [PMID: 25665915 DOI: 10.1139/cjpp-2014-0262] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
AIMS To investigate the protective effects and mechanisms of baicalin on lipopolysaccharide (LPS)-induced injury in intestinal epithelial cells and intercellular tight junctions. METHODS IEC-6 cells were stimulated with LPS (1.0 μg/mL), with or without baicalin, for 24 h. The levels of the inflammatory cytokines interleukin (IL)-6 and tumor necrosis factor (TNF)-α were determined using ELISA. Quantitative real-time PCR was used for determining the mRNA expression level of claudin-3, occludin, and ZO-1; Western blot and immunofluorescence analysis were used for analyzing the expression level and the distribution patterns of ZO-1 protein. RESULTS Pretreatment with baicalin (10.0 μg/mL) improved LPS-stimulated cell viability and repressed IL-6 and TNF-α levels. In addition, pretreatment with baicalin up-regulated mRNA and protein expression levels of ZO-1 and kept the protein intact in IEC-6 cells injured with LPS. CONCLUSION Baicalin has the capacity to protect IEC-6 cells and the intercellular tight junctions from LPS-induced injury. The mechanisms may be associated with inhibiting the production of inflammatory cytokines, and up-regulating the mRNA and protein expression of ZO-1.
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Affiliation(s)
- Jian Chen
- School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
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