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Chen WL, Dong YZ, Zhang L, Liu ZS, He CF, Liu WB, Li XF. Xylooligosaccharides alleviate the carbohydrate-enriched diet-induced intestinal barrier dysfunction in carp Megalobrama amblycephala by promoting intestinal development, immunity and gut microbiota. Int J Biol Macromol 2024; 277:134346. [PMID: 39094883 DOI: 10.1016/j.ijbiomac.2024.134346] [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: 03/17/2024] [Revised: 07/11/2024] [Accepted: 07/29/2024] [Indexed: 08/04/2024]
Abstract
To date, although the high-carbohydrate (HC) feed has been extensively adopted in the aquaculture industry, its effects on the intestinal function and development of aquatic animals still remain unclear. In addition, the corresponding nutritional intervention is still barely reported. This study aimed to evaluate the influence of xylooligosaccharides (XOS) on the intestinal health of Megalobrama amblycephala subjected to a HC feeding. Fish (average weight: 44.55 ± 0.15 g) were randomly offered 3 diets, including a control one (29 % carbohydrate), a HC one (41 % carbohydrate), and a XOS supplemented one (HC + 1.0 % XOS, HCX) respectively for 12 weeks. The HC feeding caused morphological abnormalities of intestine, an increased intestinal permeability, and the intestinal immunosuppression, all of which were markedly reversed by XOS administration. In addition, compared with the HC group, HCX feeding remarkably promoted the intestinal activities of digestive and brush border enzymes, and the expressions of cell proliferation-related proteins (Wnt10b and Cyclin D1). The 16s rDNA sequencing also revealed that XOS administration increased the abundance of beneficial bacteria, and decreased that of pathogenic ones. In conclusion, dietary supplementation of XOS improved the intestinal histomorphology, barrier function, cell proliferation and bacterial communities of carbohydrate-overloaded fish Megalobrama amblycephala.
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Affiliation(s)
- Wei-Liang Chen
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Yan-Zou Dong
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Ling Zhang
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Zi-Shang Liu
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Chao-Fan He
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Wen-Bin Liu
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China
| | - Xiang-Fei Li
- Key Laboratory of Aquatic Nutrition and Feed Science of Jiangsu Province, College of Animal Science and Technology, Nanjing Agricultural University, No.1 Weigang Road, Nanjing 210095, PR China.
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Zhang J, Jiang Y, Li H, Wang J, Li C, Zhang D. Elevation of HO-1 expression protects the intestinal mucosal barrier in severe acute pancreatitis via inhibition of the MLCK/p-MLC signaling pathway. Exp Cell Res 2023; 424:113508. [PMID: 36764591 DOI: 10.1016/j.yexcr.2023.113508] [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: 01/01/2023] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 02/11/2023]
Abstract
In severe acute pancreatitis (SAP), intestinal mucosal barrier damage can cause intestinal bacterial translocation and induce or aggravate systemic infections. Heme oxygenase-1 (HO-1) is a validated antioxidant and cytoprotective agent. This research aimed to investigate the effect and mechanism of HO-1 on SAP-induced intestinal barrier damage in SAP rats. Healthy adult male Sprague-Dawley rats were randomly separated into the sham-operated group, SAP group, SAP + Hemin group, and SAP + Znpp group. The rat model of SAP was established by retrograde injection of sodium taurocholate (5%) into the biliopancreatic duct. Hemin (a potent HO-1 activator) and Znpp (a competitive inhibitor of HO-1) were injected intraperitoneally in the selected groups 24 h before SAP. Serum and intestinal tissue samples were collected for analysis after 24 h in each group. Hemin pretreatment significantly reduced systemic inflammation, intestinal oxidative stress, and intestinal epithelial apoptosis in SAP by increasing HO-1 expression. Meanwhile, pretreatment with Hemin abolished the inhibitory effect on the expression of the tight junction proteins and significantly inhibited the activation of the MLCK/P-MLC signaling pathway. Conversely, ZnPP completely reversed these effects. Our study indicates that upregulation of HO-1 expression attenuates the intestinal mucosal barrier damage in SAP. The protective effect of HO-1 on the intestine is attributed to MLCK/p-MLC signaling pathway inhibition.
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Affiliation(s)
- Jingyin Zhang
- Qingdao University, Shandong Province, China; Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China
| | - Yingjian Jiang
- Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China
| | - Hongbo Li
- Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China
| | - Jiang Wang
- Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China
| | - Chang Li
- Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China
| | - Dianliang Zhang
- Qingdao University, Shandong Province, China; Department of The First General Surgery, Qingdao Municipal Hospital, Shandong Province, China.
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Tang Y, Kong J, Zhou B, Wang X, Liu X, Wang Y, Zhu S. Mesenteric Lymph Duct Ligation Alleviates Acute Lung Injury Caused by Severe Acute Pancreatitis Through Inhibition of High Mobility Group Box 1-Induced Inflammation in Rats. Dig Dis Sci 2021; 66:4344-4353. [PMID: 33433807 PMCID: PMC8589802 DOI: 10.1007/s10620-020-06801-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 12/16/2020] [Indexed: 02/07/2023]
Abstract
BACKGROUND Acute lung injury (ALI) is the most common complication and one of the leading causes of mortality of severe acute pancreatitis (SAP). Nevertheless, no effective therapeutic schemes are presently available. AIMS To investigate the effect and potential mechanism of mesenteric lymph duct ligation (MLDL) on experimental SAP-induced ALI. METHODS Immediately following MLDL, rats were subjected to SAP by retrograde injection of 5% sodium taurocholate into the biliopancreatic duct. At 24 h after modeling, tissues were collected for morphological examination. The levels of TNF-α, IL-6, intercellular adhesion molecule-1 (ICAM1), diamine oxidase (DAO), and D-lactic acid (D-LA) in serum, and the myeloperoxidase (MPO) activity in lung tissues were determined. Moreover, the expressions of high mobility group box 1 (HMGB1), receptor of advanced glycation endproducts (RAGE), and NF-κB p65 at the mRNA and protein levels in lung tissues, and the expressions of HMGB1, RAGE, and TNF-α at the mRNA level in intestinal lymphoid tissues were evaluated. RESULTS MLDL significantly attenuated the histological injury of the pancreas and lung and reduced the production of TNF-α, IL-6, and ICAM1. Besides, MLDL repressed the activity of MPO in the lung. However, the levels of serum DAO and D-LA were decreased without obvious morphological improvement in intestinal injury. Moreover, MLDL apparently reduced the up-regulation of HMGB1, RAGE, and NF-κB p65 in lung tissues, as well as the expressions of HMGB1, RAGE, and TNF-α in intestinal lymphoid tissues. CONCLUSIONS Mesenteric lymph was a source of harmful factors leading to SAP-ALI. MLDL could alleviate SAP-ALI probably by inhibiting HMGB1-induced production of inflammation factors.
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Affiliation(s)
- Yishuang Tang
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Jing Kong
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bingduo Zhou
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China.
| | - Xiaosu Wang
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xiaowen Liu
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yi Wang
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Shengliang Zhu
- Department of Gastroenterology, Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
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Wang Y, Song M, Zhou P, Wang J, Zheng J, Xu H. TNFAIP3-upregulated RIP3 exacerbates acute pancreatitis via activating NLRP3 inflammasome. Int Immunopharmacol 2021; 100:108067. [PMID: 34481142 DOI: 10.1016/j.intimp.2021.108067] [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: 04/19/2021] [Revised: 07/26/2021] [Accepted: 08/09/2021] [Indexed: 11/30/2022]
Abstract
Acute pancreatitis (AP) is an inflammatory disease of the pancreas. Accumulating studies have revealed the involvement of tumor necrosis factor alpha-induced protein 3 (TNFAIP3) in the progression of AP. Here, the current study was conducted to elucidate the role of TNFAIP3 and the underlying molecular mechanisms on the progression of AP. The in vivo animal model and in vitro cell model of AP were generated by retrograde injection of sodium taurocholate and stimulation of cerulein into AR42J cells, respectively. Relationships among TNFAIP3, receptor interacting protein 3 (RIP3) and nod-like receptor protein 3 (NLRP3) were predicted on bioinformatics websites and verified by co-immunoprecipitation. AR42J cells were transfected with overexpressing plasmid or shRNA to study the effects of TNFAIP3/RIP3/NLRP3 axis on cell proliferation and apoptosis, secretion of inflammatory cytokines and production of ROS. The effect of TNFAIP3/RIP3/NLRP3 axis in AP was further confirmed in vivo. High expression of TNFAIP3 was observed in AP pancreatic tissues and AP cell model. TNFAIP3 increased RIP phosphorylation through deubiquitination. RIP activated the NLRP3 inflammasome. Silencing of TNFAIP3 or RIP3T led to elevated proliferation and inhibited apoptosis in AR42J cells, accompanied by decreased inflammatory cytokine levels and ROS production. The protective role of inhibited TNFAIP3 in AP was confirmed evidenced by reduced levels of AMY, LIPA, and ROS in vivo. Collectively, overexpressed TNFAIP3 could contribute to the progression of AP by activating RIP3/NLRP3 axis, providing a potential therapeutic target for AP treatment.
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Affiliation(s)
- Yifan Wang
- Department of Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China
| | - Menglong Song
- Department of Emergency Intensive Care Unit, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China
| | - Ping Zhou
- Department of Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China
| | - Jiandong Wang
- Department of Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China
| | - Jun Zheng
- Department of Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China.
| | - Haidong Xu
- Department of Emergency Medicine, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 610072, PR China; Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital, Chengdu 610072, PR China.
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Overexpression of miR-122 Impairs Intestinal Barrier Function and Aggravates Acute Pancreatitis by Downregulating Occludin Expression. Biochem Genet 2021; 60:382-394. [PMID: 34235595 DOI: 10.1007/s10528-021-10106-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Accepted: 06/25/2021] [Indexed: 10/20/2022]
Abstract
Acute pancreatitis (AP) causes intestinal barrier damage, resulting in systemic inflammatory response syndrome (SIRS) or multiple organ dysfunction syndrome (MODS), which are important factors affecting AP severity and mortality. Here, we studied the mechanism of miR-122 in regulating intestinal barrier function in AP. AP rat model was constructed via intraperitoneal injection of ketamine, and primary intestinal epithelial cells were isolated from rats for in vitro studies. HE staining was used to assess pathological alterations of pancreas and intestines tissues. Inflammatory factors were detected by ELISA assay. qRT-PCR and WB were used to detect the expressions of miR-122 and occluding, respectively. Then dual-luciferase reporter assay, intestinal permeability test, and cell permeability were performed in vivo and in vitro to probe the molecular mechanism of miR-122 in regulating intestinal barrier function in AP. The expression of miR-122 was upregulated in AP rats, while the expression of occludin was downregulated, and the intestinal permeability was increased in AP rats and primary intestinal epithelial cells isolated from rats. Inhibition of miR-122 regulated intestinal barrier function through mediating occludin expression. miR-122 regulated intestinal barrier function to affect AP through mediating occludin expression in vivo. These results provided evidence that miR-122 overexpression impaired intestinal barrier function via regulation of occludin expression, thus promoting AP progression.
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van den Berg FF, van Dalen D, Hyoju SK, van Santvoort HC, Besselink MG, Wiersinga WJ, Zaborina O, Boermeester MA, Alverdy J. Western-type diet influences mortality from necrotising pancreatitis and demonstrates a central role for butyrate. Gut 2021; 70:915-927. [PMID: 32873697 PMCID: PMC7917160 DOI: 10.1136/gutjnl-2019-320430] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2019] [Revised: 07/09/2020] [Accepted: 07/26/2020] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The gut microbiota are the main source of infections in necrotising pancreatitis. We investigated the effect of disruption of the intestinal microbiota by a Western-type diet on mortality and bacterial dissemination in necrotising pancreatitis and its reversal by butyrate supplementation. DESIGN C57BL/6 mice were fed either standard chow or a Western-type diet for 4 weeks and were then subjected to taurocholate-induced necrotising pancreatitis. Blood and pancreas were collected for bacteriology and immune analysis. The cecum microbiota composition of mice was analysed using 16S rRNA gene amplicon sequencing and cecal content metabolites were analysed by targeted (ie, butyrate) and untargeted metabolomics. Prevention of necrotising pancreatitis in this model was compared between faecal microbiota transplantation (FMT) from healthy mice, antibiotic decontamination against Gram-negative bacteria and oral or systemic butyrate administration. Additionally, the faecal microbiota of patients with pancreatitis and healthy subjects were analysed. RESULTS Mortality, systemic inflammation and bacterial dissemination were increased in mice fed Western diet and their gut microbiota were characterised by a loss of diversity, a bloom of Escherichia coli and an altered metabolic profile with butyrate depletion. While antibiotic decontamination decreased mortality, Gram-positive dissemination was increased. Both oral and systemic butyrate supplementation decreased mortality, bacterial dissemination, and reversed the microbiota alterations. Paradoxically, mortality and bacterial dissemination were increased with FMT administration. Finally, patients with acute pancreatitis demonstrated an increase in Proteobacteria and a decrease of butyrate producers compared with healthy subjects. CONCLUSION Butyrate depletion and its repletion appear to play a central role in disease progression towards necrotising pancreatitis.
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Affiliation(s)
- Fons F van den Berg
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Demi van Dalen
- Department of Surgery, Radboudumc, Nijmegen, The Netherlands
| | - Sanjiv K Hyoju
- Department of Surgery, University of Chicago, Pritzker School of Medicine, Chicago, Illinois, USA
| | - Hjalmar C van Santvoort
- Department of Surgery, Regional Academic Cancer Center Utrecht, UMC Utrecht Cancer Center, Utrecht, The Netherlands,Department of Surgery, Sint Antonius Hospital, Nieuwegein, The Netherlands
| | - Marc G Besselink
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - Willem Joost Wiersinga
- Center for Experimental and Molecular Medicine, Department of Medicine, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Olga Zaborina
- Department of Surgery, University of Chicago, Pritzker School of Medicine, Chicago, Illinois, USA
| | - Marja A Boermeester
- Department of Surgery, Amsterdam UMC, University of Amsterdam, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam, The Netherlands
| | - John Alverdy
- Department of Surgery, University of Chicago, Pritzker School of Medicine, Chicago, Illinois, USA
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Zhang Y, Shao F, Guan Z, Luo J, Xiao X, Zhou L. Overexpression of miR-99a Alleviates Intestinal Mucosal Barrier Injury in Rats with Severe Acute Pancreatitis. J Interferon Cytokine Res 2021; 41:72-80. [PMID: 33621134 DOI: 10.1089/jir.2020.0085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Severe acute pancreatitis (SAP), which is characterized by acute onset and high mortality, is complicated with systemic inflammatory response syndrome. This study investigated the molecular mechanism underlying SAP-induced intestinal mucosal barrier injury. SAP was established in rats by retrograde injection of sodium taurocholate (STC) into biliopancreatic duct. Transfection of miR-99a mimic was conducted 24 h before the SAP establishment. Histological properties of pancreatic and intestinal tissues were observed by hematoxylin-eosin staining. The serum levels of interleukin (IL)-1β, tumor necrosis factor (TNF)-α, procalcitonin (PCT), endotoxin (ET), and diamine oxidase (DAO) were measured by enzyme-linked immunosorbent assay. The expressions of miR-99a, NADPH oxidase (NOX)4, zonula occludens (ZO)-1, occludin, and claudin-1 in pancreatic and the intestinal tissue were determined by quantitative reverse transcription polymerase chain reaction or Western blot. STC injection damaged pancreatic and intestinal tissues of the rats. During the model construction, the serum levels of IL-1β, TNF-α, PCT, ET, and DAO were increased, whereas miR-99a expression in pancreatic and intestinal tissues of the rats was decreased. miR-99a mimic alleviated SAP-induced histological abnormality of pancreatic and intestinal tissues; moreover, it reversed the serum levels of IL-1β, TNF-α, PCT, ET, and DAO increased by SAP, decreased SAP-increased NOX4 expression and increased the expressions of ZO-1, occludin, and claudin-1 previously decreased by SAP in pancreatic and the intestinal tissues. Thus, overexpressed miR-99a could alleviate intestinal mucosal barrier injury in rats with SAP.
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Affiliation(s)
- Yu Zhang
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
| | - Feifei Shao
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
| | - Zhihui Guan
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
| | - Jinming Luo
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
| | - Xiaorong Xiao
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
| | - Lingmin Zhou
- Department of Critical Care Medicine, Taizhou First People's Hospital, Taizhou, Zhejiang, China
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8
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Wang YH. Current progress of research on intestinal bacterial translocation. Microb Pathog 2020; 152:104652. [PMID: 33249165 DOI: 10.1016/j.micpath.2020.104652] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 10/19/2020] [Accepted: 11/24/2020] [Indexed: 02/07/2023]
Abstract
Under normal conditions, the intestinal flora and the body are in dynamic equilibrium. When the barrier function of the intestinal tract is damaged due to various reasons, changes in the number and proportion of bacteria or spatial displacement result in bacterial translocation (BT), which ultimately leads to multiple organ dysfunction syndrome (MODS). Endogenous infections and endotoxemia caused by intestinal flora and endotoxin translocation are the origins of inflammatory responses, and the intestinal tract is the organ in which MODS both initiates and targets. Only by ensuring the integrity of the intestinal mucosal barrier can intestinal BT be effectively prevented. Elimination of the primary disease and maintaining blood and oxygen supply to the intestine is the most basic treatment. Early initiation of the intestinal tract, establishment of enteral nutrition, and selective digestive decontamination are also highly effective treatments. Early diagnosis, intervention, or prevention of BT may be a new avenue or important connection in the treatment of various diseases. The mechanism of BT, detection techniques, prevention and treatment, and its interaction with parenteral diseases were reviewed.
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Affiliation(s)
- Yan-Hua Wang
- State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, 730046, China.
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Yu C, Zhang J, Qin Q, Liu J, Xu J, Xu W. Berberine improved intestinal barrier function by modulating the intestinal microbiota in blunt snout bream (Megalobrama amblycephala) under dietary high-fat and high-carbohydrate stress. FISH & SHELLFISH IMMUNOLOGY 2020; 102:336-349. [PMID: 32360278 DOI: 10.1016/j.fsi.2020.04.052] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 04/20/2020] [Accepted: 04/23/2020] [Indexed: 06/11/2023]
Abstract
The study investigated whether dietary berberine supplementation could improve intestinal barrier against inflammation induced by high-fat and high-carbohydrate diets in blunt snout bream. Fish (average initial weight 44.83 ± 0.06 g) were fed with six kinds of diets (control, high-fat diet (10% lipid) and high-carbohydrate (43% nitrogen-free extract) diet, control/berberine, high-fat/berberine or high-carbohydrate/berberine) for 8 weeks, respectively. Feeding mode of berberine (50 mg/kg diet) was adopted to two-week interval. After feeding trial, fish growth performance and intestinal barrier function were estimated. The result showed that no significant interactions between diet and berberine in growth performance, whole body composition or protein utilization were observed (P > 0.05). Specific growth rate (SGR) and feed conversion ratio (FCR) were significantly affected by berberine (P < 0.05). Protein efficiency ratio (PER), nitrogen retention (NRE), fish whole-body lipid contents increased greatly in high-fat or high-carbohydrate diets (P < 0.05). Significant interactions between diet and berberine were observed in fish intestinal barrier (physical, chemical, immunological and microbiological barriers) (P < 0.05). High-fat and high-carbohydrate diets could increase significantly intestinal permeability and inflammatory response, decrease intestinal mucins gene expression levels, and make the intestinal microbiota out of balance (P < 0.05). Berberine significantly inhibited inflammation response and modulated intestinal microflora profile (P < 0.05). Taken together, berberine could alleviate intestinal barrier damage injured by high-fat or high-carbohydrate diet and improve the growth performance of blunt snout bream.
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Affiliation(s)
- Chengbing Yu
- Shanghai Key Laboratory for Veterinary and Biotechnology, School of Agriculture and Biology, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 200240, PR China
| | - Jing Zhang
- Shanghai Key Laboratory for Veterinary and Biotechnology, School of Agriculture and Biology, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 200240, PR China
| | - Qin Qin
- Institute of Chinese Traditional Surgery, Longhua Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, No.725 Wanping South Road, Shanghai, 200032, PR China
| | - Jin Liu
- Shanghai Key Laboratory for Veterinary and Biotechnology, School of Agriculture and Biology, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 200240, PR China
| | - Jianxiong Xu
- Shanghai Key Laboratory for Veterinary and Biotechnology, School of Agriculture and Biology, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 200240, PR China
| | - Weina Xu
- Shanghai Key Laboratory for Veterinary and Biotechnology, School of Agriculture and Biology, Shanghai Jiao Tong University, No.800 Dongchuan Road, Shanghai, 200240, PR China.
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Singh N, Sonika U, Moka P, Sharma B, Sachdev V, Mishra SK, Upadhyay AD, Saraya A. Association of endotoxaemia & gut permeability with complications of acute pancreatitis: Secondary analysis of data. Indian J Med Res 2019; 149:763-770. [PMID: 31496529 PMCID: PMC6755773 DOI: 10.4103/ijmr.ijmr_763_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Background & objectives: In acute pancreatitis (AP) gut barrier dysfunction is considered as an important predisposing factor leading to increased intestinal permeability (IP). In this study a pooled analysis of data published in our previous four studies on various aspects of gut permeability and endotoxaemia in patients with AP was attempted to find an association between increased IP and severity of disease and associated complications. Methods: This study was a pooled analysis of data of four previously published prospective studies on AP. Gut permeability, assessed by lactulose/mannitol excretion in urine and endotoxin core antibodies type IgG and IgM (EndoCab IgG and IgM) were measured on days zero and seven (D0 and D7) of admission. All patients received standard treatment of AP. We studied whether IgG and IgM anti-endotoxin titres and lactulose-mannitol ratio (LMR) at admission and D7 were associated with organ failure, infection and mortality. Results: The titres of anti-endotoxin IgG and IgM were lower in all patients of AP (n=204), both in mild AP (n=24) and severe AP (n=180) in the first week, compared to controls (n=15). There was no significant difference in serum IgG and IgM anti-endotoxin levels and LMR at baseline and at D7 among patients with organ failure, infection and mortality. Interpretation & conclusions: Our findings showed that serum IgG and IgM anti-endotoxin titres and LMR at admission and at day 7 were not associated with organ failure, infection, and death of patients with AP.
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Affiliation(s)
- Namrata Singh
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Ujjwal Sonika
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Praneeth Moka
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Brij Sharma
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Vikas Sachdev
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Sushil Kumar Mishra
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
| | - Ashish Datt Upadhyay
- Department of Biostatistics, All India Institute of Medical Sciences, New Delhi, India
| | - Anoop Saraya
- Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India
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11
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Da-Cheng-Qi Decoction Alleviates Intestinal Injury in Rats with Severe Acute Pancreatitis by Inhibiting the JAK2-STAT3 Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 2019:3909468. [PMID: 31485245 PMCID: PMC6710798 DOI: 10.1155/2019/3909468] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Accepted: 07/17/2019] [Indexed: 02/08/2023]
Abstract
Objective To investigate the effect of Da-Cheng-Qi decoction (DCQD) on treating intestinal injury in rats with severe acute pancreatitis (SAP), based on the Janus kinase 2 (JAK2)/signal transducers and transcription 3 (STAT3) signaling pathway. Methods Rats were randomly divided into the SAP group, SAP + ruxolitinib (JAK2 inhibitor) group, SAP + Stattic (STAT3 inhibitor) group, SAP + DCQD group, and sham operation group. They were further divided into 3-hour, 6-hour, 12-hour, and 18-hour subgroups. Levels of amylase and the inflammatory cytokines tumor necrosis factor-α, interleukin 6, interleukin 10, and interleukin 4 in plasma were tested. The messenger ribonucleic acid (mRNA) expression of JAK2 and STAT3 and the protein expression of phosphorylated JAK2 (p-JAK2) and phosphorylated STAT3 (p-STAT3) in the pancreas and terminal ileum tissues were examined. Results Rats with SAP had severe changes in plasma levels of amylase and inflammatory cytokines and showed an overexpression of JAK2 mRNA, STAT3 mRNA, p-JAK2 protein, and p-STAT3 protein in the pancreas and terminal ileum. The events could be downregulated by treatment with DCQD, JAK2 inhibitor, and STAT3 inhibitor. Conclusions In rats with SAP, DCQD ameliorated inflammatory cytokines and intestinal injury, which may be closely associated with the inhibition of the JAK2/STAT3 signaling pathway.
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Autophagy Strengthens Intestinal Mucosal Barrier by Attenuating Oxidative Stress in Severe Acute Pancreatitis. Dig Dis Sci 2018; 63:910-919. [PMID: 29427225 DOI: 10.1007/s10620-018-4962-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Accepted: 02/01/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Intestinal mucosal barrier dysfunction can be caused by severe acute pancreatitis (SAP). It is normally associated with changes to mucosal autophagy and oxidative stress. OBJECTIVE The aim of this study was to investigate the correlation between autophagy and oxidative stress on the intestinal mucosal barrier of SAP rat model. METHODS SAP was induced by retrograde injection of sodium taurocholate (5%) into the biliopancreatic duct. Bacterial translocation (BT) was detected by 16S rDNA sequencing analysis. Morphological alterations in the pancreas and gut were determined by hematoxylin-eosin staining. Oxidative stress status was determined by measuring the level of intestinal malondialdehyde (MDA), superoxide dismutase (SOD) and glutathione peroxidase (GPx). Western blot, RT-PCR, and immunofluorescent staining were preformed to analyze the expression of tight junction and autophagy proteins. RESULTS According to the sequencing analysis, rats in SAP group were divided into BT (+) group (n = 9) and BT (-) group (n = 8). Pancreatic and intestinal injuries in SAP group were significantly higher than sham operation group. The content of MDA was clearly elevated, and SOD as well as GPx activities were decreased in BT (+) group as compared with BT (-) group. The expression of LC3II and Beclin1 in BT (-) group was higher than that observed in BT (+). In contrast, BT (+) group had a higher level of claudin-2 and a lower level of zonula occluden-1, occludin, and claudin-1. CONCLUSION These results suggest that activated autophagy may attenuate intestinal mucosal barrier dysfunction by preventing and reducing the oxidative stress in SAP.
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DeLoid GM, Wang Y, Kapronezai K, Lorente LR, Zhang R, Pyrgiotakis G, Konduru NV, Ericsson M, White JC, De La Torre-Roche R, Xiao H, McClements DJ, Demokritou P. An integrated methodology for assessing the impact of food matrix and gastrointestinal effects on the biokinetics and cellular toxicity of ingested engineered nanomaterials. Part Fibre Toxicol 2017; 14:40. [PMID: 29029643 PMCID: PMC5640936 DOI: 10.1186/s12989-017-0221-5] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 09/18/2017] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Engineered nanomaterials (ENMs) are increasingly added to foods to improve their quality, sensory appeal, safety and shelf-life. Human exposure to these ingested ENMs (iENMS) is inevitable, yet little is known of their hazards. To assess potential hazards, efficient in vitro methodologies are needed to evaluate particle biokinetics and toxicity. These methodologies must account for interactions and transformations of iENMs in foods (food matrix effect) and in the gastrointestinal tract (GIT) that are likely to determine nano-biointeractions. Here we report the development and application of an integrated methodology consisting of three interconnected stages: 1) assessment of iENM-food interactions (food matrix effect) using model foods; 2) assessment of gastrointestinal transformations of the nano-enabled model foods using a three-stage GIT simulator; 3) assessment of iENMs biokinetics and cellular toxicity after exposure to simulated GIT conditions using a triculture cell model. As a case study, a model food (corn oil-in-water emulsion) was infused with Fe2O3 (Iron(III) oxide or ferric oxide) ENMs and processed using this three-stage integrated platform to study the impact of food matrix and GIT effects on nanoparticle biokinetics and cytotoxicity . METHODS A corn oil in phosphate buffer emulsion was prepared using a high speed blender and high pressure homogenizer. Iron oxide ENM was dispersed in water by sonication and combined with the food model. The resulting nano-enabled food was passed through a three stage (mouth, stomach and small intestine) GIT simulator. Size distributions of nano-enabled food model and digestae at each stage were analyzed by DLS and laser diffraction. TEM and confocal imaging were used to assess morphology of digestae at each phase. Dissolution of Fe2O3 ENM along the GIT was assessed by ICP-MS analysis of supernatants and pellets following centrifugation of digestae. An in vitro transwell triculture epithelial model was used to assess biokinetics and toxicity of ingested Fe2O3 ENM. Translocation of Fe2O3 ENM was determined by ICP-MS analysis of cell lysates and basolateral compartment fluid over time. RESULTS It was demonstrated that the interactions of iENMs with food and GIT components influenced nanoparticle fate and transport, biokinetics and toxicological profile. Large differences in particle size, charge, and morphology were observed in the model food with and without Fe2O3 and among digestae from different stages of the simulated GIT (mouth, stomach, and small intestine). Immunoflorescence and TEM imaging of the cell culture model revealed markers and morphology of small intestinal epithelium including enterocytes, goblet cells and M cells. Fe2O3 was not toxic at concentrations tested in the digesta. In biokinetics studies, translocation of Fe2O3 after 4 h was <1% and ~2% for digesta with and without serum, respectively, suggesting that use of serum proteins alters iENMs biokinetics and raises concerns about commonly-used approaches that neglect iENM - food-GIT interactions or dilute digestae in serum-containing media. CONCLUSIONS We present a simple integrated methodology for studying the biokinetics and toxicology of iENMs, which takes into consideration nanoparticle-food-GIT interactions. The importance of food matrix and GIT effects on biointeractions was demonstrated, as well as the incorporation of these critical factors into a cellular toxicity screening model. Standardized food models still need to be developed and used to assess the effect of the food matrix effects on the fate and bioactivity of iENMs since commercial foods vary considerably in their compositions and structures.
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Affiliation(s)
- Glen M. DeLoid
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Yanli Wang
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Klara Kapronezai
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Laura Rubio Lorente
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Roujie Zhang
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - Georgios Pyrgiotakis
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Nagarjun V. Konduru
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
| | - Maria Ericsson
- Department of Cell Biology, Harvard Medical School, Boston, MA 02115 USA
| | - Jason C. White
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06504 USA
| | - Roberto De La Torre-Roche
- Department of Analytical Chemistry, Connecticut Agricultural Experiment Station, New Haven, CT 06504 USA
| | - Hang Xiao
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - David Julian McClements
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
- Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003 USA
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, HSPH-NIEHS Nanosafety Research Center, Department of Environmental Health, Harvard School of Public Health, Boston, MA 02115 USA
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Qi H, Lu Q, Yin C, Xiao H, Wen Y, Zhang S, Cui Q, Yang W. Exogenous leptin protects rat models of sodium taurocholate-induced severe acute pancreatitis through endocrinal and immunological pathways. Mol Med Rep 2017; 16:6306-6312. [DOI: 10.3892/mmr.2017.7320] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Accepted: 07/05/2017] [Indexed: 11/06/2022] Open
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Huang C, Chen J, Wang J, Zhou H, Lu Y, Lou L, Zheng J, Tian L, Wang X, Cao Z, Zeng Y. Dysbiosis of Intestinal Microbiota and Decreased Antimicrobial Peptide Level in Paneth Cells during Hypertriglyceridemia-Related Acute Necrotizing Pancreatitis in Rats. Front Microbiol 2017; 8:776. [PMID: 28522995 PMCID: PMC5415626 DOI: 10.3389/fmicb.2017.00776] [Citation(s) in RCA: 78] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2016] [Accepted: 04/18/2017] [Indexed: 12/21/2022] Open
Abstract
Hypertriglyceridemia (HTG) aggravates the course of acute pancreatitis (AP). Intestinal barrier dysfunction is implicated in the pathogenesis of AP during which dysbiosis of intestinal microbiota contributes to the dysfunction in intestinal barrier. However, few studies focus on the changes in intestine during HTG-related acute necrotizing pancreatitis (ANP). Here, we investigated the changes in intestinal microbiota and Paneth cell antimicrobial peptides (AMPs) in HTG-related ANP (HANP) in rats. Rats fed a high-fat diet to induce HTG and ANP was induced by retrograde injection of 3.5% sodium taurocholate into biliopancreatic duct. Rats were sacrificed at 24 and 48 h, respectively. Pancreatic and ileal injuries were evaluated by histological scores. Intestinal barrier function was assessed by plasma diamine oxidase activity and D-lactate level. Systemic and intestinal inflammation was evaluated by tumor necrosis factor alpha (TNFα), interleukin (IL)-1β, and IL-17A expression. 16S rRNA high throughput sequencing was used to investigate changes in intestinal microbiota diversity and structure. AMPs (α-defensin5 and lysozyme) expression was measured by real-time polymerase chain reaction (PCR) and immunofluorescence. The results showed that compared with those of normal-lipid ANP (NANP) groups, the HANP groups had more severe histopathological injuries in pancreas and distal ileum, aggravated intestinal barrier dysfunction and increased TNFα, IL-1β, and IL-17A expression in plasma and distal ileum. Principal component analysis showed structural segregation between the HANP and NANP group. α-Diversity estimators in the HANP group revealed decreased microbiota diversity compared with that in NANP group. Taxonomic analysis showed dysbiosis of intestinal microbiota structure. In the HANP group, at phyla level, Candidatus_Saccharibacteria and Tenericutes decreased significantly, whereas Actinobacteria increased. At genus level, Allobaculum, Bifidobacterium, and Parasutterella increased significantly, while Alloprevotella, Anaerotruncus, Candidatus_Saccharimonas, Christensenellaceae_R-7_group, Rikenellaceae_RC9_gut_group, Ruminiclostridium_5, Ruminococcaceae_UCG-005, and Ruminococcaceae_UCG-014 decreased. Compared with those in the NANP rats, mRNA expression of lysozyme and α-defensin5 and protein expression of lysozyme decreased significantly in the HANP rats. Moreover, in the NANP rats and the HANP rats, Allobaculum abundance was inversely correlated with lysozyme expression, while Anaerotruncus abundance was positively correlated with it by Spearman test. In conclusion, intestinal microbiota dysbiosis and decreased AMPs of Paneth cells might participate in the pathogenesis of intestinal barrier dysfunction in HANP.
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Affiliation(s)
- Chunlan Huang
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Jing Chen
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Jingjing Wang
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Hui Zhou
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Yingying Lu
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Lihong Lou
- International Medical Care Center, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Junyuan Zheng
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Ling Tian
- Shanghai Key Laboratory of Pancreatic Diseases, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Xingpeng Wang
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Zhongwei Cao
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
| | - Yue Zeng
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of MedicineShanghai, China
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Dysbiosis of intestinal microbiota and decrease in paneth cell antimicrobial peptide level during acute necrotizing pancreatitis in rats. PLoS One 2017; 12:e0176583. [PMID: 28441432 PMCID: PMC5404871 DOI: 10.1371/journal.pone.0176583] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 04/12/2017] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVES Intestinal barrier dysfunction plays an important role in acute necrotizing pancreatitis (ANP) and intestinal microbiota dysbiosis was involved in intestinal barrier failure. Paneth cells protect intestinal barrier and are associated with intestinal microbiota. Here, we investigated changes in intestinal microbiota and antimicrobial peptides of Paneth cells in ileum during ANP. METHODS Rats with ANP were established by retrograde injection of 3.5% sodium taurocholate into biliopancreatic duct and sacrificed at 24h and 48h, respectively. Injuries of pancreas and distal ileum were evaluated by histopathological score. Intestinal barrier function was assessed by plasma diamine oxidase activity (DAO) and D-lactate. Systemic and intestinal inflammation was evaluated by TNFα, IL-1β and IL-17A concentration by ELISA, respectively. 16S rRNA high throughput sequencing on fecal samples was used to investigate the changes in intestinal microbiota in the ANP group at 48h. Lysozyme and α-defensin5 were measured by real-time PCR, western blot and immunofluoresence. RESULTS ANP rats had more severe histopathological injuries in pancreas and distal ileum, injured intestinal barrier and increased expression of TNFα, IL-1β and IL-17A in plasma and distal ileum compared with those of the sham-operated (SO) group. Principal component analysis (PCA) showed structural segregation between the SO and ANP groups. Operational taxonomic unit (OTU) number and ACE index revealed decreased microbiota diversity in the ANP group. Taxonomic analysis showed dysbiosis of intestinal microbiota structure. At phyla level, Saccharibacteria and Tenericutes decreased significantly. At genus level, Escherichia-Shigella and Phascolarctobacterium increased significantly, while Candidatus_Saccharimonas, Prevotellaceae_UCG-001, Lachnospiraceae_UCG-001, Ruminiclostridium_5 and Ruminococcaceae_UCG-008 decreased significantly. Lysozyme and α-defensin5 mRNA expression levels decreased significantly in ANP group at 48h. Protein expression of lysozyme decreased in ANP groups at 24h and 48h. Meanwhile, the relative abundance of Escherichia-Shigella correlated inversely with the decrease in lysozyme. CONCLUSION The disorder in intestinal microbiota and decreases of Paneth cell antimicrobial peptides might participate in the pathogenesis of intestinal barrier dysfunction during ANP.
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Luo H, Zhou DJ, Chen Z, Zhou QQ, Wu K, Tian K, Li ZW, Xiao ZL. Establishment and evaluation of an experimental rat model for high-altitude intestinal barrier injury. Exp Ther Med 2016; 13:475-482. [PMID: 28352318 PMCID: PMC5348649 DOI: 10.3892/etm.2016.4012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 10/28/2016] [Indexed: 01/19/2023] Open
Abstract
In the present study an experimental high-altitude intestinal barrier injury rat model was established by simulating an acute hypoxia environment, to provide an experimental basis to assess the pathogenesis, prevention and treatment of altitude sickness. A total of 70 healthy male Sprague-Dawley rats were divided into two groups: Control group (group C) and a high-altitude hypoxia group (group H). Following 2 days adaptation, the rats in group H were exposed to a simulated 4,000-m, high-altitude hypoxia environment for 3 days to establish the experimental model. To evaluate the model, bacterial translocation, serum lipopolysaccharide level, pathomorphology, ultrastructure and protein expression in rats were assessed. The results indicate that, compared with group C, the rate of bacterial translocation and the apoptotic index of intestinal epithelial cells were significantly higher in group H (P<0.01). Using a light microscope it was determined that the intestinal mucosa was thinner in group H, there were fewer epithelial cells present and the morphology was irregular. Observations with an electron microscope indicated that the intestinal epithelial cells in group H were injured, the spaces among intestinal villi were wider, the tight junctions among cells were open and lanthanum nitrate granules (from the fixing solution) had diffused into the intestinal mesenchyme. The expression of the tight junction protein occludin was also decreased in group H. Therefore, the methods applied in the present study enabled the establishment of a stable, high-altitude intestinal barrier injury model in rats.
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Affiliation(s)
- Han Luo
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Dai-Jun Zhou
- The Fourth Institute of Field Surgery, Daping Hospital, Third Military Medical University, Chongqing 400042, P.R. China
| | - Zhang Chen
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Qi-Quan Zhou
- High Altitude Military Medical Science Academy, Third Military Medical University, Chongqing 400038, P.R. China
| | - Kui Wu
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Kun Tian
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Zhi-Wei Li
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Zhen-Liang Xiao
- Respiratory Department, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
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Up-regulation of Tight-Junction Proteins by p38 Mitogen-Activated Protein Kinase/p53 Inhibition Leads to a Reduction of Injury to the Intestinal Mucosal Barrier in Severe Acute Pancreatitis. Pancreas 2016; 45:1136-44. [PMID: 27171513 DOI: 10.1097/mpa.0000000000000656] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVES The aim of this study was to explore the role of the p38 mitogen-activated protein kinase (p38MAPK)/p53 signaling pathway in injury to the intestinal mucosal barrier during severe acute pancreatitis (SAP). METHODS Both sham operation and SAP groups had 3 subgroups analyzed 3, 6, or 12 hours after the SAP induction. The concentrations of amylase, endotoxin, diamine oxidase, tumor necrosis factor α, and phospho-p38MAPK, p53, and caspase-3 and the messenger RNA levels of zonula occludens protein-1 and occludin in the intestine were measured. Immunohistochemical staining was used to determine the expression of zonula occludens protein-1 and occludin. Pathological changes of the pancreas and intestine were also assessed. Then, rats were randomly assigned to 5 groups-sham operation group, SAP group, 3 groups treated with different concentrations of p38MAPK-inhibitor SB203580-and the abovementioned experiment was repeated and analyzed 6 hours after the SAP induction. RESULTS The phospho-p38MAPK reached a peak value at 6 hours after the SAP induction with obvious pathological injury to the pancreas and intestine. Treatment with SB203580 led to a less damage to the pancreatic and intestinal tissues. CONCLUSIONS These results suggest that SAP activates the p38MAPK/p53 signaling pathway and induces injury to the intestinal mucosal barrier, which can be alleviated by inhibiting the p38MAPK/p53 pathway.
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Tan SJ, Yu C, Yu Z, Lin ZL, Wu GH, Yu WK, Li JS, Li N. High-fat enteral nutrition reduces intestinal mucosal barrier damage after peritoneal air exposure. J Surg Res 2015; 202:77-86. [PMID: 27083951 DOI: 10.1016/j.jss.2015.12.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2015] [Revised: 11/05/2015] [Accepted: 12/01/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND Peritoneal air exposure is needed in open abdominal surgery, but long-time exposure could induce intestinal mucosal barrier dysfunction followed by many postoperative complications. High-fat enteral nutrition can ameliorate intestinal injury and improve intestinal function in many gastrointestinal diseases. In the present study, we investigated the effect of high-fat enteral nutrition on intestinal mucosal barrier after peritoneal air exposure and the underlying mechanism. METHODS Male adult rats were administrated saline, low-fat or high-fat enteral nutrition via gavage before and after peritoneal air exposure for 3 h. Rats undergoing anesthesia without laparotomy received saline as control. Twenty four hours after surgery, samples were collected to assess intestinal mucosal barrier changes in serum D-lactate levels, intestinal permeability, intestinal tight junction protein ZO-1 and occludin levels, and intestinal histopathology. The levels of malondialdehyde and the activity of superoxide dismutase in the ileum tissue were also measured to assess the status of intestinal oxidative stress. RESULTS High-fat enteral nutrition significantly decreased the serum D-lactate level and increased the intestinal tight junction protein ZO-1 level when compared to the group treated with low-fat enteral nutrition (P < 0.05). Meanwhile, histopathologic findings showed that the intestinal mucosal injury assessed by the Chiu's score and the intestinal epithelial tight junction were also improved much more in the high-fat enteral nutrition-treated group (P < 0.05). In addition, the intestinal malondialdehyde level was lower, and the intestinal superoxide dismutase activity was higher in the high-fat enteral nutrition-treated group than that in the low-fat enteral nutrition-treated group (P < 0.05). CONCLUSIONS These results suggest that high-fat enteral nutrition could reduce intestinal mucosal barrier damage after peritoneal air exposure, and the underlying mechanism may be associated with its antioxidative action. Perioperative administration of high-fat enteral nutrition may be a promising intervention to preserve intestinal mucosal barrier function in open abdominal surgery.
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Affiliation(s)
- Shan-Jun Tan
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China; Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Chao Yu
- Department of Nephrology, Shanghai Tenth People's Hospital Affiliated to Tongji University, Shanghai, China
| | - Zhen Yu
- Department of General Surgery, Shanghai Tenth People's Hospital Affiliated to Tongji University, Shanghai, China
| | - Zhi-Liang Lin
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Guo-Hao Wu
- Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China.
| | - Wen-Kui Yu
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
| | - Jie-Shou Li
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China
| | - Ning Li
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, China.
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Tan S, Yu W, Lin Z, Chen Q, Shi J, Dong Y, Duan K, Bai X, Xu L, Yu Z, Li J, Li N. Berberine Ameliorates Intestinal Mucosal Barrier Damage Induced by Peritoneal Air Exposure. Biol Pharm Bull 2015; 38:122-6. [DOI: 10.1248/bpb.b14-00643] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Shanjun Tan
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Wenkui Yu
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Zhiliang Lin
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Qiyi Chen
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Jialiang Shi
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Yi Dong
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Kaipeng Duan
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Xiaowu Bai
- Research Institute of General Surgery, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University
| | - Lin Xu
- Research Institute of General Surgery, Jinling Hospital, Clinical School of Nanjing, Second Military Medical University
| | - Zhen Yu
- Department of General Surgery, Shanghai Tenth People’s Hospital Affiliated to Tongji University
| | - Jieshou Li
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
| | - Ning Li
- Research Institute of General Surgery, Jinling Hospital, Medical School of Nanjing University
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The effect of peritoneal air exposure on intestinal mucosal barrier. Gastroenterol Res Pract 2014; 2014:674875. [PMID: 25210511 PMCID: PMC4158158 DOI: 10.1155/2014/674875] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 07/17/2014] [Accepted: 08/04/2014] [Indexed: 11/25/2022] Open
Abstract
Background. Damage of the intestinal mucosa barrier may result in intestinal bacterial and endotoxin translocation, leading to local and systemic inflammation. The present study was designed to investigate whether peritoneal air exposure induces damage of intestinal mucosal barrier. Methods. Sprague-Dawley rats (weighing 210 to 230 g) were randomized into five groups (6/group): a control group, a sham group, and three exposure groups with peritoneal air exposure for 1, 2, and 3 h, respectively. At 24 h after surgery, blood and terminal ileum were sampled. The serum D-lactate levels were determined using an ELISA kit. The intestinal permeability was determined by measuring the intestinal clearance of FITC-dextran (FD4). The histopathological changes in terminal ileum were also assessed. Results. Compared with the controls, peritoneal air exposure caused an increase in both serum D-lactate level and intestinal FD4 clearance, which were proportional to the length of peritoneal air exposure and correlated to Chiu's scores, indices for intestinal mucosal injury. Edema and inflammatory cells were also observed in mucosa and submucosa of ileum in three exposure groups. Conclusions. Peritoneal air exposure could induce damage to the intestinal mucosal barrier, which is proportional to the time length of peritoneal air exposure.
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