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Oami T, Abtahi S, Shimazui T, Chen CW, Sweat YY, Liang Z, Burd EM, Farris AB, Roland JT, Tsukita S, Ford ML, Turner JR, Coopersmith CM. Claudin-2 upregulation enhances intestinal permeability, immune activation, dysbiosis, and mortality in sepsis. Proc Natl Acad Sci U S A 2024; 121:e2217877121. [PMID: 38412124 DOI: 10.1073/pnas.2217877121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 01/16/2024] [Indexed: 02/29/2024] Open
Abstract
Intestinal epithelial expression of the tight junction protein claudin-2, which forms paracellular cation and water channels, is precisely regulated during development and in disease. Here, we show that small intestinal epithelial claudin-2 expression is selectively upregulated in septic patients. Similar changes occurred in septic mice, where claudin-2 upregulation coincided with increased flux across the paracellular pore pathway. In order to define the significance of these changes, sepsis was induced in claudin-2 knockout (KO) and wild-type (WT) mice. Sepsis-induced increases in pore pathway permeability were prevented by claudin-2 KO. Moreover, claudin-2 deletion reduced interleukin-17 production and T cell activation and limited intestinal damage. These effects were associated with reduced numbers of neutrophils, macrophages, dendritic cells, and bacteria within the peritoneal fluid of septic claudin-2 KO mice. Most strikingly, claudin-2 deletion dramatically enhanced survival in sepsis. Finally, the microbial changes induced by sepsis were less pathogenic in claudin-2 KO mice as survival of healthy WT mice injected with cecal slurry collected from WT mice 24 h after sepsis was far worse than that of healthy WT mice injected with cecal slurry collected from claudin-2 KO mice 24 h after sepsis. Claudin-2 upregulation and increased pore pathway permeability are, therefore, key intermediates that contribute to development of dysbiosis, intestinal damage, inflammation, ineffective pathogen control, and increased mortality in sepsis. The striking impact of claudin-2 deletion on progression of the lethal cascade activated during sepsis suggests that claudin-2 may be an attractive therapeutic target in septic patients.
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Affiliation(s)
- Takehiko Oami
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA 30322
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Shabnam Abtahi
- Laboratory of Mucosal Pathobiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115
| | - Takashi Shimazui
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA 30322
- Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, Chiba 260-8670, Japan
| | - Ching-Wen Chen
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Yan Y Sweat
- Laboratory of Mucosal Pathobiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115
| | - Zhe Liang
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Eileen M Burd
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322
| | - Alton B Farris
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA 30322
| | - Joe T Roland
- Epithelial Biology Center, Department of Surgery, Vanderbilt University Medical Center, Nashville, TN 37240
| | - Sachiko Tsukita
- Advanced Comprehensive Research Organization, Teikyo University, Tokyo 173-0003, Japan
| | - Mandy L Ford
- Department of Surgery and Emory Transplant Center, Emory University School of Medicine, Atlanta, GA 30322
| | - Jerrold R Turner
- Laboratory of Mucosal Pathobiology, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115
| | - Craig M Coopersmith
- Department of Surgery and Emory Critical Care Center, Emory University School of Medicine, Atlanta, GA 30322
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Yang Q, Zhang Z, Chen Z, Wang Y, Chen Y, Zheng J, Li R, Li L, Mo L, Liang Q, Chen F, Wang J, Li X. Flot2 deficiency facilitates B cell-mediated inflammatory responses and endotoxic shock. Immunology 2023; 170:567-578. [PMID: 37688314 DOI: 10.1111/imm.13692] [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: 03/21/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
Sepsis is a life-threatening disease characterized by multiple organ dysfunction. B cells play a pivotal role in sepsis. Here, we first observed the significantly reduced Flot2 gene expression in B cells from patients with bacterial sepsis and endotoxin-induced septic mice. However, the effects of Flot2 on sepsis and B-cell immunity remain unknown. Thus, we sorted B cells from Flot2 knockout (Flot2-/- ) mice, RNA-seq revealed significantly upregulated effector B cell (Beff) cytokines such as Il6, Il1b and Cxcl10 after Flot2 deficiency, while it showed no effect on the expression of regulatory B cell (Breg) cytokines such as Il10, Tgfb. Consistently, elevated Beff cytokine IL-6 and unchanged Breg cytokine IL-10 were shown in B cells from Flot2-/- mice. Similar results were subsequently observed in B cell-specific Flot2 knockout chimeric mice. Notably, Flot2 deficiency aggravated sepsis with increased lung injury and shortened survival time in vivo by facilitating Beffs but not Bregs. Taken together, our data identify Flot2 as a novel controller of B cells, Flot2 deficiency amplifies inflammation by affecting Beffs to participate in the pathogenesis and progression of sepsis.
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Affiliation(s)
- Qin Yang
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Zhenhua Zhang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Ziye Chen
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Yiyuan Wang
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Yan Chen
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Jiehuang Zheng
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Ruopeng Li
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Lihong Li
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Lixia Mo
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Qinghe Liang
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Fengsheng Chen
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
| | - Junjian Wang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, China
| | - Xiaojuan Li
- Laboratory of Anti-inflammatory and Immunomodulatory Pharmacology, Innovation Program of Drug Research on Inflammatory and Immune Diseases, NMPA Key Laboratory for Research and Evaluation of Drug Metabolism & Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, China
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Inhibition of PFKFB Preserves Intestinal Barrier Function in Sepsis by Inhibiting NLRP3/GSDMD. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:8704016. [PMID: 36589684 PMCID: PMC9803577 DOI: 10.1155/2022/8704016] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 12/24/2022]
Abstract
Intestinal barrier dysfunction is associated with the occurrence and development of sepsis. Further, aerobic glycolysis plays an essential role in inflammation and cell death. This study is aimed at investigating the protective effect and mechanism of PFKFB3 inhibition on intestinal barrier dysfunction in sepsis mice. Sepsis mouse models were established by cecal ligation and puncture (CLP) in wild-type mice and Gsdmd-/- mice. The results showed that the expression of 6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 3 (PFKFB3) in the small intestines was significantly upregulated in sepsis. 3-(3-Pyridinyl)-1-(4-pyridinyl)-2-propen-1-one (3PO), the specific inhibitor of PFKFB3, and Gsdmd gene knockout significantly inhibited the inflammatory response and cell death caused by sepsis, thus alleviating intestinal damage and barrier dysfunction. 3PO was also shown to significantly inhibit oxidative stress and NLRP3/caspase-1/GSDMD-dependent cell pyroptosis in the small intestines. The in vitro studies revealed that 3PO reduced NLRP3/caspase-1/GSDMD-dependent cell pyroptosis by inhibiting ROS. Taken together, our results suggest that PFKFB3 is involved in inflammation, oxidative stress, and pyroptosis during sepsis and enhances intestinal damage, which may provide important clues about the potential targets to be exploited in this highly lethal disease.
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Do MH, Lee HHL, Park M, Oh MJ, Lee E, Kweon M, Park HY. Morinda citrifolia Extract Prevents Alcoholic Fatty Liver Disease by Improving Gut Health. J Med Food 2022; 25:1102-1111. [PMID: 36516056 DOI: 10.1089/jmf.2022.k.0056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Alcoholic liver disease (ALD) is a major chronic liver disease. Chronic alcohol consumption induces dysbiosis, disruption of gut barrier function, oxidative stress, inflammation, and changes in lipid metabolism, thereby leading to ALD. In this study, we investigated whether the commercial Morinda citrifolia extract Nonitri can ameliorate ALD symptoms through the gut-liver axis. We used mice chronically administered EtOH and found a marked increase in serum endotoxin levels and biomarkers of liver pathology. Moreover, the EtOH-treated group showed significantly altered gut microbial composition particularly that of Alistipes, Bacteroides, and Muribaculum and disrupted gut barrier function. However, Nonitri improved serum parameters, restored the microbial proportions, and regulated levels of zonula occludens1, occludin, and claudin1. Furthermore, Nonitri suppressed inflammation by inhibiting endotoxin-triggered toll-like receptor 4-signaling pathway and fat deposition by reducing lipogenesis through activating AMP-activated protein kinase in the liver. Furthermore, Pearson's correlation analysis showed that gut microbiota and ALD-related markers were correlated, and Nonitri regulated these bacteria. Taken together, our results indicate that the hepatoprotective effect of Nonitri reduces endotoxin levels by improving gut health, and inhibits fat deposition by regulating lipid metabolism.
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Affiliation(s)
- Moon Ho Do
- Food Functionality Research Division; Jeollabuk-do, Korea
| | - Hyun Hee L Lee
- Chem-Bio Technology Center, Agency for Defense Development, Daejeon, Korea
| | - Miri Park
- Food Functionality Research Division; Jeollabuk-do, Korea
| | - Mi-Jin Oh
- Food Functionality Research Division; Jeollabuk-do, Korea
| | - Eunjung Lee
- Food Convergence Research Division; Korea Food Research Institute, Jeollabuk-do, Korea
| | - Minson Kweon
- Functional Ingredient Development Team, COSMAX NS INC, Gyeonggi-do, Korea
| | - Ho-Young Park
- Food Functionality Research Division; Jeollabuk-do, Korea
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Zhan L, Zheng J, Meng J, Fu D, Pang L, Ji C. Toll-like receptor 4 deficiency alleviates lipopolysaccharide-induced intestinal barrier dysfunction. Biomed Pharmacother 2022; 155:113778. [DOI: 10.1016/j.biopha.2022.113778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 11/02/2022] Open
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Xu Y, Kong X, Zhu Y, Xu J, Mao H, Li J, Zhang J, Zhu X. Contribution of gut microbiota toward renal function in sepsis. Front Microbiol 2022; 13:985283. [PMID: 36147845 PMCID: PMC9486003 DOI: 10.3389/fmicb.2022.985283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Accepted: 08/16/2022] [Indexed: 11/13/2022] Open
Abstract
Sepsis most often involves the kidney and is one of the most common causes of acute kidney injury. The prevalence of septic acute kidney injury has increased significantly in recent years. The gut microbiota plays an important role in sepsis. It interacts with the kidney in a complex and multifactorial process, which is not fully understood. Sepsis may lead to gut microbiota alteration, orchestrate gut mucosal injury, and cause gut barrier failure, which further alters the host immunological and metabolic homeostasis. The pattern of gut microbiota alteration also varies with sepsis progression. Changes in intestinal microecology have double-edged effects on renal function, which also affects intestinal homeostasis. This review aimed to clarify the interaction between gut microbiota and renal function during the onset and progression of sepsis. The mechanism of gut–kidney crosstalk may provide potential insights for the development of novel therapeutic strategies for sepsis.
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Affiliation(s)
- Yaya Xu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Xiangmei Kong
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Yueniu Zhu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Jiayue Xu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Haoyun Mao
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Jiru Li
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
| | - Jianhua Zhang
- Department of Pediatric Respiratory, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
- *Correspondence: Jianhua Zhang,
| | - Xiaodong Zhu
- Department of Pediatric Critical Care Medicine, Xinhua Hospital, Affiliated to the Medical School of Shanghai Jiao Tong University, Shanghai, China
- Xiaodong Zhu,
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Shen Q, Wei XM, Hu JN, Li MH, Li K, Qi SM, Liu XX, Wang Z, Li W, Wang YP. Saponins From Platycodon grandiflorum Reduces Cisplatin-Induced Intestinal Toxicity in Mice through Endoplasmic Reticulum Stress-Activated Apoptosis. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2022; 50:1927-1944. [PMID: 36056466 DOI: 10.1142/s0192415x22500823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Saponins from the roots of Platycodon grandiflorum, an edible medicinal plant, have shown a wide range of beneficial effects on various biological processes. In this study, an animal model was established by a single intraperitoneal injection of cisplatin (20[Formula: see text]mg/kg) for evaluating the protective effects of saponins from the roots of P. grandiflorum (PGS, 15[Formula: see text]mg/kg and 30[Formula: see text]mg/kg) in mice. The results indicated that PGS treatment for 10 days restored the destroyed intestinal mucosal oxidative system, and the loosened junctions of small intestinal villi was significantly improved. In addition, a significant mitigation of apoptotic effects deteriorated by cisplatin exposure in small intestinal villi was observed by immunohischemical staining. Also, western blot showed that PGS could effectively prevent endoplasmic reticulum (ER) stress-induced apoptosis caused by cisplatin in mice by restoring the activity of PERK (an ER kinase)-eIF2[Formula: see text]-ATF4 signal transduction pathway. Furthermore, molecular docking results of main saponins in PGS suggested a better binding ability with target proteins. In summary, the present work revealed the underlying protective mechanisms of PGS on intestinal injury induced by cisplatin in mice.
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Affiliation(s)
- Qiong Shen
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
- National & Local Joint Engineering Research, Center for Ginseng Breeding and Development, Changchun 130118, P. R. China
| | - Xiao-Meng Wei
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Jun-Nan Hu
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Ming-Han Li
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Ke Li
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Si-Min Qi
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Xiang-Xiang Liu
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
- Center for Life Science, School of Life Sciences, Yunnan University, Kunming 650500 P. R. China
| | - Zi Wang
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
| | - Wei Li
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
- National & Local Joint Engineering Research, Center for Ginseng Breeding and Development, Changchun 130118, P. R. China
| | - Ying-Ping Wang
- College of Chinese Medicinal Materials, Jilin Agricultural University, P. R. China
- National & Local Joint Engineering Research, Center for Ginseng Breeding and Development, Changchun 130118, P. R. China
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Li X, Li Q, Xiong B, Chen H, Wang X, Zhang D. Discoidin domain receptor 1(DDR1) promote intestinal barrier disruption in Ulcerative Colitis through tight junction proteins degradation and epithelium apoptosis. Pharmacol Res 2022; 183:106368. [PMID: 35905891 DOI: 10.1016/j.phrs.2022.106368] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/12/2022] [Accepted: 07/22/2022] [Indexed: 12/11/2022]
Abstract
BACKGROUND AND AIMS Discoidin domain receptor 1 (DDR1) encodes a receptor tyrosine kinase involved in multiple physiological and pathological processes. DDR1 is expressed in the intestinal epithelium, but its role in Ulcerative Colitis (UC) is poorly understand. This study aimed to identify the function of DDR1 in maintaining the homeostasis of UC. METHODS The DDR1 expression level in non-inflamed and inflamed colon samples from IBD patients were assessed. DDR1 knock-out (DDR1-/-) and wild-type (WT) mice were administered dextran sulfate sodium (DSS) to induce colitis and assessed based on colitis symptoms. In addition, intestinal epithelial barrier injury was induced by TNF-α and IFN-γ incubation to cell monolayers transfected with PCDH-DDR1 or pLKO.1-sh-DDR1-1 plasmids. The effect of DDR1 in regulating barrier integrity, tight junctions (TJ) protein status, and cell apoptosis was investigated in vivo and in vitro. Furthermore, the activation of the NF-κB p65-MLCK-p-MLC2 pathway was also investigated. RESULTS Decreased DDR1 expression levels were observed at the inflamed sites compared with the non-inflamed. DDR1-/- mice had alleviated intestinal mucosal barrier injuries, upregulated TJ proteins, decreased epithelium apoptosis from DSS-induced colitis, and reduced proinflammatory cytokines production in the colon. These findings were further confirmed in vitro. DDR1 over-expression aggravated the TNF-α/IFN-γ-induced TJ disruption, while DDR1 shRNA prevented TJ damage even in the presence of JSH-23. DDR1 dependently destroyed the intestinal barrier via the NF-κB p65-MLCK-p-MLC2 pathway. CONCLUSION Our findings revealed that DDR1 regulated the intestinal barrier in colitis by modulating TJ proteins expression and epithelium apoptosis, making it a potential target of UC.
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Affiliation(s)
- Xiaoli Li
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China
| | - Qianqian Li
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China
| | - Bin Xiong
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China
| | - Huiling Chen
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China
| | - Xiaochun Wang
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China
| | - Dekui Zhang
- Department of Gastroenterology, The Second Clinical Medical College of Lanzhou University, LanZhou University Second Hospital, Lanzhou, China; Key Laboratory of Digestive Diseases, LanZhou University Second Hospital, Lanzhou, China.
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Wang Z, Yin L, Qi Y, Zhang J, Zhu H, Tang J. Intestinal Flora-Derived Kynurenic Acid Protects Against Intestinal Damage Caused by Candida albicans Infection via Activation of Aryl Hydrocarbon Receptor. Front Microbiol 2022; 13:934786. [PMID: 35923391 PMCID: PMC9339982 DOI: 10.3389/fmicb.2022.934786] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/20/2022] [Indexed: 12/25/2022] Open
Abstract
Colonization of the intestinal tract by Candida albicans (C. albicans) can lead to invasive candidiasis. Therefore, a functional intestinal epithelial barrier is critical for protecting against invasive C. albicans infections. We collected fecal samples from patients with Candida albicans bloodstream infection and healthy people. Through intestinal flora 16sRNA sequencing and intestinal metabolomic analysis, we found that C. albicans infection resulted in a significant decrease in the expression of the metabolite kynurenic acid (KynA). We used a repeated C. albicans intestinal infection mouse model, established following intake of 3% dextran sulfate sodium salt (DSS) for 9 days, and found that KynA, a tryptophan metabolite, inhibited inflammation, promoted expression of intestinal tight junction proteins, and protected from intestinal barrier damage caused by invasive Candida infections. We also demonstrated that KynA activated aryl hydrocarbon receptor (AHR) repressor in vivo and in vitro. Using Caco-2 cells co-cultured with C. albicans, we showed that KynA activated AHR, inhibited the myosin light chain kinase-phospho-myosin light chain (MLCK-pMLC) signaling pathway, and promoted tristetraprolin (TTP) expression to alleviate intestinal inflammation. Our findings suggest that the metabolite KynA which is differently expressed in patients with C. albicans infection and has a protective effect on the intestinal epithelium, via activating AHR, could be explored to provide new potential therapeutic strategies for invasive C. albicans infections.
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Affiliation(s)
- Zetian Wang
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
| | - Liping Yin
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
| | - Yue Qi
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
| | - Jiali Zhang
- Department of Central Laboratory, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
| | - Haiyan Zhu
- Department of Biological Medicines & Shanghai Engineering Research Center of Immunotherapeutics, Fudan University School of Pharmacy, Shanghai, China
- Haiyan Zhu,
| | - Jianguo Tang
- Department of Trauma-Emergency & Critical Care Medicine, Shanghai Fifth People’s Hospital, Fudan University, Shanghai, China
- *Correspondence: Jianguo Tang,
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10
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Zhan L, Pu J, Zheng J, Hang S, Pang L, Dai M, Ji C. Tetrastigma hemsleyanum Diels et Gilg ameliorates lipopolysaccharide induced sepsis via repairing the intestinal mucosal barrier. Biomed Pharmacother 2022; 148:112741. [PMID: 35217279 DOI: 10.1016/j.biopha.2022.112741] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/15/2022] [Accepted: 02/17/2022] [Indexed: 11/02/2022] Open
Abstract
OBJECTIVE Sepsis causes excessive systemic inflammation and leads to multiple organ dysfunction syndrome (MODS). The intestine plays a key role in the occurrence and development of sepsis. Tetrastigma hemsleyanum Diels et Gilg (San ye qing, SYQ), a precious Chinese medicine, has been widely used for centuries due to its high traditional value, such as a remarkable anti-inflammatory effect. However, the role of SYQ in intestinal permeability during the development of sepsis needs to be discovered. METHODS Mice were intraperitoneally injected with lipopolysaccharide (LPS) to simulate intestinal mucosal barrier function damage in sepsis. Pathological section, inflammatory cytokines, tight junctions, cell apoptosis, and intestinal flora were detected to evaluate the protective effect of SYQ on intestinal mucosal barrier injury in LPS-induced septic mice. RESULTS The results showed that SYQ treatment obviously attenuated LPS-induced intestinal injury and reduced the production of tumor necrosis factor α (TNF-α), interleukin 1β (IL-1β), and interleukin 6 (IL-6). Besides, SYQ also up-regulated the expressions of tight junctions, including Zonula occludens 1 (ZO-1), Claudin-5, and Occludin along with a decreased in the levels of myosin light chain kinase (MLCK) and myosin light chain (MLC). In addition, SYQ down-regulated the expression of Bax/Bcl2 as well as that of cleaved caspase-3 to prevent the cells from undergoing apoptosis. Further, SYQ restored the diversity of the intestinal flora, increased the abundance of Firmicutes, and decreased the abundance of Bacteroidota. CONCLUSIONS The study indicated that SYQ exerted its protective effect on intestinal mucosal barrier injury in LPS-induced septic mice by reducing inflammatory response, improving the tight junction protein expression, inhibiting cell apoptosis, and adjusting the intestinal flora structure.
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Affiliation(s)
- Lianghui Zhan
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, China; Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang 310014, China
| | - Jinbao Pu
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, China; Zhejiang Academy of Traditional Chinese Medicine, Hangzhou, Zhejiang 310014, China
| | - Jingru Zheng
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310014, China
| | - Suni Hang
- Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310014, China
| | - Lisha Pang
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, China
| | - Muhua Dai
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, China
| | - Chunlian Ji
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310014, China.
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11
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Zhang Y, Tao M, Chen C, Zhao X, Feng Q, Chen G, Fu Y. BAFF Blockade Attenuates DSS-Induced Chronic Colitis via Inhibiting NLRP3 Inflammasome and NF-κB Activation. Front Immunol 2022; 13:783254. [PMID: 35320937 PMCID: PMC8934862 DOI: 10.3389/fimmu.2022.783254] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 02/04/2022] [Indexed: 02/02/2023] Open
Abstract
Background BAFF production is increased in IBD patients. However, the specific role of BAFF in IBD is still uncovered. This study aimed to investigate the expression and function of BAFF in experimental colitis and the potential mechanisms. Methods BAFF levels in the serum and colon tissues were measured by ELISA in DSS-induced colitis mice. Mouse-derived BAFF antibody was administered in DSS mice. The changes of body weight, disease activity index (DAI) scores, colon length, spleen weight, histopathological damage, inflammatory indicators, NF-κB signaling, and NLRP3 inflammasome were assayed in DSS mice and control. LPS-primed RAW264.7 cells and bone marrow derived macrophages (BMDMs) were treated with BAFF blockage and recombinant mouse BAFF. Inflammatory associated cytokines, NLRP3 inflammasomes and NF-κB signaling were detected among groups. Results BAFF production was elevated systemically and locally in colitis mice. BAFF blockade improved the body weight loss, DAI scores, colon length, spleen weight, and histopathological damage in colitis mice. Immunoflurescence analysis revealed that elevated macrophages in mucosal lamina propria were the primary source of BAFF in the colon. NLRP3 inflammasome and NF-κB signaling pathway activation were dramatically inhibited in DSS mice treated with BAFF blockage. In LPS-primed RAW264.7 cells/BMDMs, BAFF blockade decreased the activation of NLRP3 inflammasome (NLPR3, ASC, cleaved IL-1β, cleaved caspase 1) via inhibiting NF-κB signaling pathway. Moreover, LPS synergizes with BAFF to promote inflammatory factor secretion and expression of NF-κB signaling pathway in RAW264.7 cells. Conclusions These results suggested that BAFF blockade protected against colitis partially by relieving inflammation, inhibiting intestinal NLRP3 inflammasome and NF-κB signaling pathway from macrophages. BAFF plays an important role in inflammation regulation in IBD, thus providing a novel idea for further research on colitis and experimental evidences for novel potential therapeutic target in IBD.
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Affiliation(s)
- Ying Zhang
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meihui Tao
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chaoyue Chen
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xi Zhao
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qinyu Feng
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guang Chen
- Department of Integrated Traditional Chinese and Western Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Fu
- Department of Gastroenterology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yu Fu,
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12
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Takeda A, Hasegawa E, Yawata N, Notomi S, Ishikawa K, Murakami Y, Hisatomi T, Kimura K, Sonoda KH. Increased vitreous levels of B cell activation factor (BAFF) and soluble interleukin-6 receptor in patients with macular edema due to uveitis related to Behçet's disease and sarcoidosis. Graefes Arch Clin Exp Ophthalmol 2022; 260:2675-2686. [PMID: 35230474 DOI: 10.1007/s00417-022-05600-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 02/11/2022] [Accepted: 02/18/2022] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Uveitis accounts for 10-15% of all cases of blindness in the developed world. Uveitic macular edema (UME) is a primary cause of permanent visual impairment in patients with uveitis. Because proinflammatory mediators elicit inflammation and lead to UME, we determined the profiles of proinflammatory mediators associated with complications, such as ME, in the vitreous humor of patients with panuveitis related to Behçet's disease (BD) and sarcoidosis. METHODS In this retrospective study, we enrolled 21 patients with uveitis, including 6 with BD and 15 with sarcoidosis, and 15 patients with idiopathic epiretinal membrane (iERM) at the Department of Ophthalmology, Kyushu University Hospital, between January 2008 and April 2016. Vitreous concentrations of 32 proinflammatory mediators, including cytokines and soluble receptors of tumor necrosis factor (TNF) and interleukin (IL)-6 families, were assessed using a bead-based multiplex assay and their association with clinical data was examined. RESULTS The levels of proinflammatory mediators, including a proliferation-inducing ligand (APRIL), B cell activating factor belonging to the TNF family (BAFF), soluble cluster of differentiation 30 (sCD30), soluble TNF receptor-1 (sTNFR1), sTNFR2, TNF-α, IL-6, and soluble IL-6 receptor-α (sIL-6Rα), were significantly higher in patients with uveitis. With regard to clinical parameters in patients with uveitis, vitreous levels of BAFF and sIL-6Rα were prominently elevated in patients with UME compared to in those without UME (P < 0.01, respectively). CONCLUSIONS Our results suggest that elevated vitreous levels of BAFF and sIL-6Rα are associated with the pathogenesis of UME in patients with panuveitis related to BD and sarcoidosis.
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Affiliation(s)
- Atsunobu Takeda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan.
| | - Eiichi Hasegawa
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Nobuyo Yawata
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
- Department of Ocular Pathology and Imaging Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shoji Notomi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Keijiro Ishikawa
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Yusuke Murakami
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
| | - Toshio Hisatomi
- Department of Ophthalmology, Chikushi Hospital, Fukuoka University, Chikushino, Fukuoka, Japan
| | - Kazuhiro Kimura
- Department of Ophthalmology, Graduate School of Medicine, Yamaguchi University, Ube, Yamaguchi, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-Ku, Fukuoka, 812-8582, Japan
- Department of Ocular Pathology and Imaging Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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13
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Wan J, Yu X, Niu JQ, Qiu L, Wang F, Chen XL. Inhibition of Bruton's Tyrosine Kinase Protects Against Burn Sepsis-Induced Intestinal Injury. Front Med (Lausanne) 2022; 9:809289. [PMID: 35280898 PMCID: PMC8907476 DOI: 10.3389/fmed.2022.809289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 01/31/2022] [Indexed: 11/18/2022] Open
Abstract
This study aimed to investigate the role and molecular mechanisms of Bruton's tyrosine kinase (BTK), a member of the Tec family in burn sepsis-induced intestinal injury. Eighty C57BL/6 mice were randomly divided into four groups: the sham group, the burn group, the burn + sepsis group, and the burn + sepsis + LFM-A13 (a selective BTK inhibitor) group. The dynamic expression profiles of BTK and p-BTK in the intestine were measured by Western blot analysis. Intestinal histopathological changes and cellular apoptosis were determined. Inflammatory cytokines in serum and intestinal tissue were examined through enzyme-linked immunosorbent assay. Myeloperoxidase (MPO) activity was determined via a colorimetric assay. Intestinal p-BTK expression in the burn+sepsis group was significantly increased compared with that in the sham and burn groups. In the burn + sepsis group, the p-BTK expression level increased over time, peaked at 12, and then decreased at 24 h. LFM-A13 administration significantly inhibited p-BTK expression in the intestine. In contrast to the sham and burn groups, the burn + sepsis group exhibited obvious histopathological changes, which gradually aggravated over time. LFM-A13 also reduced the histopathological changes and cellular apoptosis in intestinal tissues, inhibited the inflammatory cytokines IL-4, IL-6, and TNF-α in serum and intestinal tissues, and significantly inhibited the increase in intestinal MPO activity induced by burn sepsis. BTK activation is one important aspect of the signaling event that may mediate the release of the anti-inflammatory cytokine IL-4 and the pro-inflammatory cytokines IL-6 and TNF-α; oxidative stress; and intestinal cell apoptosis. Thus, it contributes to burn sepsis-induced intestinal injury.
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14
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p-Hydroxybenzoic acid alleviates inflammatory responses and intestinal mucosal damage in DSS-induced colitis by activating ERβ signaling. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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15
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Dong R, Ye N, Zhao S, Wang G, Zhang Y, Wang T, Zou P, Wang J, Yao T, Chen M, Zhou C, Zhang T, Luo L. Studies on Novel Diagnostic and Predictive Biomarkers of Intrahepatic Cholestasis of Pregnancy Through Metabolomics and Proteomics. Front Immunol 2021; 12:733225. [PMID: 34721396 PMCID: PMC8552060 DOI: 10.3389/fimmu.2021.733225] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/27/2021] [Indexed: 11/25/2022] Open
Abstract
Background Intrahepatic cholestasis of pregnancy (ICP) usually occurs in the third trimester and is associated with increased risks in fetal complications. Currently, the exact mechanism of this disease is unknown. The purpose of this study was to develop potential biomarkers for the diagnosis and prediction of ICP. Methods We enrolled 40 pregnant women diagnosed with ICP and 40 healthy pregnant controls. The number of placental samples and serum samples between the two groups was 10 and 40 respectively. Ultra-performance liquid chromatography tandem high-resolution mass spectrometry was used to analyze placental metabolomics. Then, we verified the differentially expressed proteins and metabolites, both placental and blood serum, in the first, second, and third trimesters. Results Metabolomic analysis of placental tissue revealed that fatty acid metabolism and primary bile acid biosynthesis were enriched. In the integrated proteomic and metabolomic analysis of placental tissue, peroxisomal acyl-CoA oxidase 1 (ACOX1), L-palmitoylcarnitine, and glycocholic acid were found to be three potential biomarkers. In a follow–up analysis, expression levels of both placental and serum ACOX1, L-palmitoylcarnitine, and glycocholic acid in both placenta and serum were found to be significantly higher in third-trimester ICP patients; the areas under the ROC curves were 0.823, 0.896, and 0.985, respectively. Expression levels of serum ACOX1, L-palmitoylcarnitine, and glycocholic acid were also significantly higher in first- and second-trimester ICP patients; the areas under the ROC curves were 0.726, 0.657, and 0.686 in the first trimester and 0.718, 0.727, and 0.670 in the second trimester, respectively. Together, levels of the three aforementioned biomarkers increased the value for diagnosing and predicting ICP (AUC: 0.993 for the third, 0.891 for the second, and 0.932 for the first trimesters). Conclusions L-palmitoylcarnitine, ACOX1, and glycocholic acid levels taken together may serve as a new biomarker set for the diagnosis and prediction of ICP.
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Affiliation(s)
- Ruirui Dong
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ningzhen Ye
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Shaojie Zhao
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Gaoying Wang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Yan Zhang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Tiejun Wang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Ping Zou
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Jing Wang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Tingting Yao
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Minjian Chen
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, School of Public Health, Nanjing Medical University, Nanjing, China.,Key Laboratory of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, China
| | - Conghua Zhou
- School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang, China
| | - Ting Zhang
- The Affiliated Wuxi Matemity and Child Health Care Hospital of Nanjing Medical University, Wuxi, China
| | - Liang Luo
- The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, China
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16
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Wang C, Liang G, Shen J, Kong H, Wu D, Huang J, Li X. Long Non-Coding RNAs as Biomarkers and Therapeutic Targets in Sepsis. Front Immunol 2021; 12:722004. [PMID: 34630395 PMCID: PMC8492911 DOI: 10.3389/fimmu.2021.722004] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/18/2021] [Indexed: 12/14/2022] Open
Abstract
Sepsis, an infection-induced systemic inflammatory disorder, is often accompanied by multiple organ dysfunction syndromes with high incidence and mortality rates, and those who survive are often left with long-term sequelae, bringing great burden to social economy. Therefore, novel approaches to solve this puzzle are urgently needed. Previous studies revealed that long non-coding RNAs (lncRNAs) have exerted significant influences on the process of sepsis. The aim of this review is to summarize our understanding of lncRNAs as potential sepsis-related diagnostic markers and therapeutic targets, and provide new insights into the diagnosis and treatment for sepsis. In this study, we also introduced the current diagnostic markers of sepsis and discussed their limitations, while review the research advances in lncRNAs as promising biomarkers for diagnosis and prognosis of sepsis. Furthermore, the roles of lncRNAs in sepsis-induced organ dysfunction were illustrated in terms of different organ systems. Nevertheless, further studies should be carried out to elucidate underlying molecular mechanisms and pathological process of sepsis.
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Affiliation(s)
- Chuqiao Wang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, State Key Laboratory of Respiratory Disease, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China.,Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Guorui Liang
- Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Jieni Shen
- Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Haifan Kong
- Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Donghong Wu
- Nanshan School, Guangzhou Medical University, Guangzhou, China
| | - Jinxiang Huang
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, State Key Laboratory of Respiratory Disease, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China
| | - Xuefeng Li
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People's Hospital, State Key Laboratory of Respiratory Disease, Sino-French Hoffmann Institute, School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, China.,Shenzhen Luohu People's Hospital, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
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17
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Zhang S, Fu B, Xiong Y, Zhao Q, Xu S, Lin X, Wu H. Tgm2 alleviates LPS-induced apoptosis by inhibiting JNK/BCL-2 signaling pathway through interacting with Aga in macrophages. Int Immunopharmacol 2021; 101:108178. [PMID: 34607226 DOI: 10.1016/j.intimp.2021.108178] [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] [Received: 06/07/2021] [Revised: 09/08/2021] [Accepted: 09/18/2021] [Indexed: 12/19/2022]
Abstract
Sepsis is an unusual systemic infection caused by bacteria, which is a life-threatening organ dysfunction. The innate immune system plays an important role in this process; however, the specific mechanisms remain unclear. Using the LPS + treated mouse model, we found that the survival rate of Tgm2-/- mice was lower than that of the control group, while the inflammation was much higher. We further showed that Tgm2 suppressed apoptosis by inhibiting the JNK/BCL-2 signaling pathway. More importantly, Tgm2 interacted with Aga and regulated mitochondria-mediated apoptosis induced by LPS. Our findings elucidated a protective mechanism of Tgm2 during LPS stimulation and may provide a new reference target for the development of novel anti-infective drugs from the perspective of host immunity.
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Affiliation(s)
- Shanfu Zhang
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Beibei Fu
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Yan Xiong
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Qingting Zhao
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Shiyao Xu
- School of Life Sciences, Chongqing University, Chongqing 401331, China
| | - Xiaoyuan Lin
- School of Life Sciences, Chongqing University, Chongqing 401331, China.
| | - Haibo Wu
- School of Life Sciences, Chongqing University, Chongqing 401331, China.
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18
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陈 炜, 王 璐, 谢 斌, 谢 邵, 王 风. [The role of serum B cell activation factor in the diagnosis and phenotypes of chronic rhinosinusitis with nasal polyps]. LIN CHUANG ER BI YAN HOU TOU JING WAI KE ZA ZHI = JOURNAL OF CLINICAL OTORHINOLARYNGOLOGY, HEAD, AND NECK SURGERY 2021; 35:886-891. [PMID: 34628809 PMCID: PMC10127701 DOI: 10.13201/j.issn.2096-7993.2021.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Indexed: 11/12/2022]
Abstract
Objective:To investigate the changes of serum B cell activating factor(BAFF) levels in chronic rhinosinusitis with nasal polyps(CRSwNP) patients and its predictive value in phenotypes. Methods:Forty healthy volunteers(control group) and 77 patients with CRSwNP were recruited in the present study, all CRSwNP patients were divided into eosinophilic(neCRSwNP group, n=40) and non-eosinophilic(eCRSwNP group, n=37) according to the degree of eosinophil infiltration in postoperative histological sections. Serum samples were collected from all subjects, and serum BAFF levels were detected by ELISA, and the relationships between BAFF levels and clinical variables were evaluated. The predictive value of serum BAFF in distinguishing eCRSwNP was evaluated by receiver operating curve(ROC) and Logistic regression. Results:BAFF concentrations in the serum of CRSwNP patients were(1.2±0.4) ng/mL, which were higher than control group([0.8±0.3]ng/mL). In addition, serum BAFF levels in eCRSwNP group were (1.3±0.5) ng/mL, which were higher than neCRSwNP group([1.1±0.2]ng/mL), and both groups were higher than control groupt(P<0.05). The elevated serum BAFF levels in CRSwNP patients were positively correlated with the tissue eosinophil percentage(r=0.629, P<0.001) and counts(r=0.563, P<0.001), peripheral blood eosinophil percentage(r=0.411, P=0.002) and counts(r=0.501, P<0.001), and serum total IgE(r=0.178, P=0.021). Multivariate Logistic regression showed that serum BAFF level was an independent factor associated with CRSwNP phenotypes(OR=3.652, P=0.001). ROC analysis suggested that serum BAFF exhibited a good predictive value for eCRSwNP(AUC=0.885). Conclusion:Serum BAFF levels were increased in CRSwNP patients and associated with the degree of systemic and polyp eosinophilic inflammation. Preoperative evaluation of serum BAFF level maybe clinically meaningful for distinguishing CRSwNP phenotypes.
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Affiliation(s)
- 炜 陈
- 湖南省妇幼保健院病理科(长沙,410008)Department of Pathology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, 410008, China
| | - 璐 王
- 中南大学湘雅医院健康管理中心Health Management Center, Xiangya Hospital of Central South University
| | - 斌 谢
- 中南大学湘雅医院病理科Department of Pathology, Xiangya Hospital of Central South University
| | - 邵兵 谢
- 中南大学湘雅医院耳鼻咽喉头颈外科Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University
| | - 风君 王
- 中南大学湘雅医院耳鼻咽喉头颈外科Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University
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Yang Q, Yu J, Qin H, Liu L, Di C, Zhuang Q, Yin H. Irbesartan suppresses lipopolysaccharide (LPS)-induced blood-brain barrier (BBB) dysfunction by inhibiting the activation of MLCK/MLC. Int Immunopharmacol 2021; 98:107834. [PMID: 34174702 DOI: 10.1016/j.intimp.2021.107834] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 12/26/2022]
Abstract
The basic function of the blood-brain barrier (BBB) is to selectively regulate the infiltration of solutes from the circulating blood into the central nervous system (CNS). Impaired BBB activity is related to brain damage caused by stroke, traumatic injury, neurodegenerative diseases, etc. Comprised of a monolayer of endothelial cells, the integrity of the BBB is determined by the expression of tight junction proteins and the contractile activity of the perijunctional apical actomyosin ring. Irbesartan, an AT1R antagonist, has been widely used for the treatment of hypertension. However, the pharmacological function of Irbesartan in the balance of the BBB is still unknown. In the present study, we performed both in-vivo and in-vitro experiments using lipopolysaccharide (LPS) to explore the mechanism behind the protective effects of Irbesartan against the BBB impairment. The results of our mouse model study revealed that Irbesartan could reduce BBB permeability, restore the expression of Occludin, and suppress the expression of inflammatory mediators, including interleukin-6, monocyte chemoattractant protein-1, and intercellular adhesion molecule-1. Additionally, Irbesartan improved LPS-induced depressive-like behavior. In our in vitro experiments, human brain microvascular endothelial cells (HBMVECs) stimulated with LPS demonstrated decreased endothelial permeability and increased occludin expression in response to Irbesartan treatment. Importantly, we found that the protective effects of Irbesartan were mediated through the NF-κB/MLC/MLCK signaling pathway, as blockage of NF-κB abolished the effects of Irbesartan. Our findings provide a basis for further research into the neuroprotective mechanism of Irbesartan.
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Affiliation(s)
- Qixia Yang
- Department of Pharmacy, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Juanjuan Yu
- Department of Pharmacy, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Hao Qin
- Department of Neurosurgery, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Long Liu
- Department of Neurosurgery, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Chao Di
- Department of Neurosurgery, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Qiang Zhuang
- Department of Neurosurgery, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China
| | - Hang Yin
- Department of Neurosurgery, Zaozhuang Municipal Hospital, Zaozhuang, Shandong 277100, China.
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