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Song R, He S, Wu Y, Tan S. Pyroptosis in sepsis induced organ dysfunction. Curr Res Transl Med 2024; 72:103419. [PMID: 38246070 DOI: 10.1016/j.retram.2023.103419] [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: 04/17/2023] [Revised: 09/27/2023] [Accepted: 10/05/2023] [Indexed: 01/23/2024]
Abstract
As an uncontrolled inflammatory response to infection, sepsis and sepsis induced organ dysfunction are great threats to the lives of septic patients. Unfortunately, the pathogenesis of sepsis is complex and multifactorial, which still needs to be elucidated. Pyroptosis is a newly discovered atypical form of inflammatory programmed cell death, which depends on the Caspase-1 dependent classical pathway or the non-classical Caspase-11 (mouse) or Caspase-4/5 (human) dependent pathway. Many studies have shown that pyroptosis is related to sepsis. The Gasdermin proteins are the key molecules in the membrane pores formation in pyroptosis. After cut by inflammatory caspase, the Gasdermin N-terminal fragments with perforation activity are released to cause pyroptosis. Pyroptosis is closely related to the occurrence and development of sepsis induced organ dysfunction. In this review, we summarized the molecular mechanism of pyroptosis, the key role of pyroptosis in sepsis and sepsis induced organ dysfunction, with the aim to bring new diagnostic biomarkers and potential therapeutic targets to improve sepsis clinical treatments.
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Affiliation(s)
- Ruoyu Song
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China; Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, China; National Medicine Functional Experimental Teaching Center, Central South University, Changsha, China.
| | - Shijun He
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China; Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, China; National Medicine Functional Experimental Teaching Center, Central South University, Changsha, China
| | - Yongbin Wu
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China; Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, China; National Medicine Functional Experimental Teaching Center, Central South University, Changsha, China
| | - Sipin Tan
- Department of Pathophysiology, School of Basic Medicine Science, Central South University, Changsha, China; Sepsis Translational Medicine Key Laboratory of Hunan Province, Central South University, Changsha, China; National Medicine Functional Experimental Teaching Center, Central South University, Changsha, China.
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2
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Liu ZM, Zhang YN, Zhang HF, Chen XJ, Peng H, Zhang XY. Restoration of the Mucosal IgA Response by Improving CD4 + T Pyroptosis Fails to Attenuate Gut Bacterial Translocation and Organ Damage After LPS Attack. Dig Dis Sci 2024; 69:798-810. [PMID: 38334934 DOI: 10.1007/s10620-024-08278-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 01/03/2024] [Indexed: 02/10/2024]
Abstract
BACKGROUND Currently, the mechanisms of impaired gut mucosal immunity in sepsis remain unclear. Gut immunoglobulin A (IgA) is an important defense mechanism against invasive pathogens, and CD4+ T cells regulate the IgA response. AIM We aimed to verify the hypothesis indicating that CD4+ T pyroptosis induced by lipopolysaccharide (LPS) leads to an impaired gut IgA response and subsequent bacterial translocation and organ damage. METHODS Cultured CD4+ T cells and mice were manipulated with LPS, and pyroptosis was improved by A438079 or adoptive CD4+ T cell transfer. The changes demonstrated in pyroptosis-related molecules, cytotoxicity and CD4+ T cells were examined to determine CD4+ T pyroptosis. The changes demonstrated in IgA+ B cells, AID (key enzyme for immunoglobulins) and IgA production and function were examined to evaluate the IgA response. Serum biomarkers, bacterial colonies and survival analysis were detected for bacterial translocation and organ damage. RESULTS LPS attack induced CD4+ T pyroptosis, as evidenced by increased expression of P2X7, Caspase-11 and cleaved GSDMD, which elevated cytotoxicity and decreased CD4+ T cells. Decreased CD4+ T subsets (Foxp3+ T and Tfh cells) influenced the IgA response, as evidenced by lower AID expression, which decreased IgA+ B cells and IgA production and function. A438079 or cell transfer improved the IgA response but failed to reduce the translocation of gut pathogens, damage to the liver and kidney, and mortality of mice. CONCLUSION LPS attack results in CD4+ T pyroptosis. Improvement of pyroptosis restores the mucosal IgA response but fails to ameliorate bacterial translocation and organ damage.
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Affiliation(s)
- Zi-Meng Liu
- Department of Critical Care Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, People's Republic of China
| | - Yi-Nan Zhang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510089, China
| | - Hu-Fei Zhang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510089, China
| | - Xiao-Jun Chen
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510089, China
| | - Hui Peng
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510089, China
| | - Xu-Yu Zhang
- Department of Anesthesiology, The First Affiliated Hospital, Sun Yat-sen University, No. 58, Zhongshan 2nd Road, Guangzhou, 510089, China.
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3
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Ning W, Gao G, Zhou Y, Li WQ, Yang HH, Duan XB, Li X, Gong YB, Li D, Guo R. Calcitonin gene-related peptide ameliorates sepsis-induced intestinal injury by suppressing NLRP3 inflammasome activation. Int Immunopharmacol 2023; 116:109747. [PMID: 36706592 DOI: 10.1016/j.intimp.2023.109747] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 01/08/2023] [Accepted: 01/14/2023] [Indexed: 01/26/2023]
Abstract
Intestinal damage has long been viewed as the primary cause of sepsis-induced multiple organ dysfunction syndrome (MODS). Previous studies have demonstrated that calcitonin gene-related peptide (CGRP) exhibits anti-inflammatory and protective effects in mice exposed to endotoxin. This study investigated whether CGRP protects against sepsis-induced intestinal damage and its underlying mechanisms. Using a murine caecal ligation and puncture (CLP) model, we observed elevated serum and intestinal CGRP levels in septic mice. CGRP knockout (KO) mice showed more severe intestinal barrier damage, excessive NLRP3 inflammasome activation and higher levels of inflammation. In vitro, we used lipopolysaccharide (LPS) and adenosine triphosphate (ATP) to activate the NLRP3 inflammasome in MODE-K murine intestinal epithelial cells. CGRP inhibited NF-κB pathway activation; prevented ASC assembly and ROS accumulation; significantly decreased NLRP3, Caspase-1 p10, and IL-1β levels and LDH release; and increased cell viability. Treatment with an IL-1β inhibitor or CGRP suppressed p38 MAPK and ERK1/2 pathway activation and increased ZO-1 and Occludin protein levels in LPS+ATP-treated MODE-K cells. Finally, we used the CGRP upstream agonist drug rutaecarpine (RUT) to control endogenous CGRP release in mice, and this drug demonstrated good therapeutic effects on septic intestinal injury. In conclusion, our results suggest that CGRP ameliorates sepsis-induced intestinal damage, providing valuable insights for drug development.
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Affiliation(s)
- Wei Ning
- Laboratory Department, The Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Ge Gao
- Laboratory Department, The Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Yong Zhou
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha 410078, China
| | - Wen-Qun Li
- Department of Pharmacy, The Second Xiangya Hospital, Central South University, Changsha 410011, China
| | - Hui-Hui Yang
- Department of Physiology, School of Basic Medical Science, Central South University, Changsha 410078, China
| | - Xiang-Bing Duan
- Laboratory Department, The Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Xin Li
- Laboratory Department, The Third Xiangya Hospital, Central South University, Changsha 410013, China
| | - Yi-Bo Gong
- Department of Cardiovascular Surgery, The Second Xiangya Hospital of Central South University, Changsha 410011, China
| | - Dai Li
- Phase I Clinical Research Center, Xiangya Hospital, Central South University, Changsha 410005, China.
| | - Ren Guo
- Department of Pharmacy, The Third Xiangya Hospital, Central South University, Changsha 410013, China.
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4
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An analysis of intestinal morphology and incretin-producing cells using tissue optical clearing and 3-D imaging. Sci Rep 2022; 12:17530. [PMID: 36266531 PMCID: PMC9584944 DOI: 10.1038/s41598-022-22511-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 10/17/2022] [Indexed: 01/13/2023] Open
Abstract
Tissue optical clearing permits detailed evaluation of organ three-dimensional (3-D) structure as well as that of individual cells by tissue staining and autofluorescence. In this study, we evaluated intestinal morphology, intestinal epithelial cells (IECs), and enteroendocrine cells, such as incretin-producing cells, in reporter mice by intestinal 3-D imaging. 3-D intestinal imaging of reporter mice using optical tissue clearing enabled us to evaluate both detailed intestinal morphologies and cell numbers, villus length and crypt depth in the same samples. In disease mouse model of lipopolysaccharide (LPS)-injected mice, the results of 3-D imaging using tissue optical clearing in this study was consistent with those of 2-D imaging in previous reports and could added the new data of intestinal morphology. In analysis of incretin-producing cells of reporter mice, we could elucidate the number, the percentage, and the localization of incretin-producing cells in intestine and the difference of those between L cells and K cells. Thus, we established a novel method of intestinal analysis using tissue optical clearing and 3-D imaging. 3-D evaluation of intestine enabled us to clarify not only detailed intestinal morphology but also the precise number and localization of IECs and incretin-producing cells in the same samples.
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Sun G, Song X, Zou Y, Teng T, Jiang L, Shi B. Dietary Glucose Ameliorates Impaired Intestinal Development and Immune Homeostasis Disorders Induced by Chronic Cold Stress in Pig Model. Int J Mol Sci 2022; 23:ijms23147730. [PMID: 35887078 PMCID: PMC9317271 DOI: 10.3390/ijms23147730] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 07/11/2022] [Accepted: 07/11/2022] [Indexed: 01/03/2023] Open
Abstract
Endotherms are easily challenged by chronic cold stress. In this study, the development and injury of the small intestine in the Min pig model and Yorkshire pig model under chronic cold stress, and the molecular mechanisms by which glucose supplementation reduces small intestinal mucosal damage were investigated. The results showed that morphological structure lesions of the jejunal mucosa and ileal mucosa were visible in Yorkshire pigs under chronic cold stress. Meanwhile, the Occludin mRNA and protein expression in jejunal mucosa of Yorkshire pigs was decreased. Chronic cold stress enhanced the expression of Toll-like receptor 4 (TLR4), the myeloid differentiation main response 88 (MyD88), nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3), cleaved caspase-1, mature-IL-1β, and high-mobility group box 1 (HMGB 1) mRNA and protein expression in jejunal mucosa of Yorkshire pigs, whereas the mRNA and protein of Bax was triggered in ileal mucosa. In Min pigs, no such deleterious consequences were observed. Dietary glucose supplementation ameliorates small intestinal mucosal injury, declined TLR4 and MyD88 expression in jejunal mucosa. In conclusion, chronic cold stress induced the small intestinal mucosa damage in Yorkshire pigs, whereas glucose supplementation mitigated the deleterious effects of chronic cold stress on the small intestine.
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6
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Cheng N, Zhang L, Liu L. Understanding the Role of Purinergic P2X7 Receptors in the Gastrointestinal System: A Systematic Review. Front Pharmacol 2021; 12:786579. [PMID: 34987401 PMCID: PMC8721002 DOI: 10.3389/fphar.2021.786579] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/17/2021] [Indexed: 11/24/2022] Open
Abstract
Background: The role of purinergic P2X7 receptor (P2X7R) is of interest due to its involvement in inflammation and mediating immune cell responses. P2X7R is particularly implicated in the development of inflammatory bowel disease (IBD). However, the extent of the actions of P2X7R in the gastrointestinal (GI) system under physiological and pathophysiological conditions remains to be elucidated. This systematic review aimed to identify, summarize and evaluate the evidence for a critical role of P2X7R in the GI system. Methods: We searched PubMed, Embase and Scopus with search terms pertained to P2X7R in the GI system in disease or physiological state, including “P2X7 or P2X7 receptor or purinergic signaling” in combination with any of the terms “intestine or colon or gut or gastrointestinal,” “pathology or inflammation or disease or disorder,” and “physiology or expression.” Titles and abstracts were screened for potentially eligible full texts, and animal and human studies published in English were included in this study. Data were extracted from papers meeting inclusion criteria. Meta-analysis was not feasible given the study diversity. Results: There were 48 papers included in this review. We identified 14 experimental colitis models, three sepsis models and one ischemia-reperfusion injury model. Among them, 11 studies examined P2X7R in GI infections, six studies on immune cell regulation, four studies on GI inflammation, two studies on GI malignancies, three studies involving intestinal injury due to various causes, two studies on ATP-activated P2X7R in the GI system and two studies on metabolic regulation. Conclusion: Evidence supports P2X7R mediating inflammation and immune cell responses in GI inflammation, infections and injury due to IBD and other challenges to the intestinal wall. P2X7R inhibition by gene knockout or by application of P2X7R antagonists can reduce tissue damage by suppressing inflammation. P2X7R is also implicated in GI malignancies and glucose and lipid homeostasis. P2X7R blockade, however, did not always lead to beneficial outcomes in the various pathological models of study.
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Affiliation(s)
- Nathalie Cheng
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Li Zhang
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, Sydney, NSW, Australia
| | - Lu Liu
- School of Medical Sciences, UNSW Sydney, Sydney, NSW, Australia
- *Correspondence: Lu Liu,
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7
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Deng Z, Yang Z, Peng J. Role of bioactive peptides derived from food proteins in programmed cell death to treat inflammatory diseases and cancer. Crit Rev Food Sci Nutr 2021:1-19. [PMID: 34694177 DOI: 10.1080/10408398.2021.1992606] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Bioactive peptides are specific peptide which usually contains 2-20 amino acid residues and actively exerts various functions and biological activities and ultimately affect health. Programmed cell deaths are some styles of cell death discovered in recent years, which is the key to tissue development and balance, eliminating excess, damaged or aging cells. More importantly, programmed cell death is a potential way to treat inflammatory diseases and cancer. In this review, through screening references from 2015 to present, we introduce the effect of bioactive peptides derived from food proteins on inflammatory diseases or cancer through regulating programmed cell deaths, including apoptosis, autophagy, pyroptosis, ferroptosis, and necroptosis. And this review also introduces the targets of these bioactive peptides to regulate programmed cell death. The purpose of this review is to help to expand the prospective applications of bioactive peptides in the field of inflammatory disease and cancer to provide some guidance.
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Affiliation(s)
- Zhao Deng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China.,State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China
| | - Zhipeng Yang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China
| | - Jian Peng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan, P. R. China.,State Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, China.,The Cooperative Innovation Center for Sustainable Pig Production, Wuhan, Hubei, China
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8
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Wang K, Chen X, Zuo L, Pan C, Liu G, Zhang X, Du J, Zhang C, Zhang B, Wang Z, Li M, Zhang A, Jiang N. Dietary sodium butyrate protects lipopolysaccharide-induced inflammatory response in lambs through inhibiting TLR4/NF-κB signalling pathway. ITALIAN JOURNAL OF ANIMAL SCIENCE 2021. [DOI: 10.1080/1828051x.2021.1955627] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Kexin Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Xiang Chen
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Lijun Zuo
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Chunyuan Pan
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Gan Liu
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Xinyu Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Jiahua Du
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Cunhao Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Bofu Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Zhao Wang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Muyang Li
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Aizhong Zhang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
| | - Ning Jiang
- College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing, China
- Key Laboratory of Feed Resource Efficient Utilization and Nutrition Manipulation in Cold Region of Heilongjiang Province, Daqing, China
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Sun K, Zhang J, Yang Q, Zhu J, Zhang X, Wu K, Li Z, Xie W, Luo X. Dexmedetomidine exerts a protective effect on ischemic brain injury by inhibiting the P2X7R/NLRP3/Caspase-1 signaling pathway. Brain Res Bull 2021; 174:11-21. [PMID: 33991606 DOI: 10.1016/j.brainresbull.2021.05.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 04/30/2021] [Accepted: 05/08/2021] [Indexed: 12/29/2022]
Abstract
Dexmedetomidine (Dex) has been suggested to exert a protective function in ischemic brain injury. In this study, we aimed to elucidate the intrinsic mechanisms of Dex in regulating microglia pyroptosis in ischemic brain injury via the purinergic 2X7 receptor (P2X7R)/NLRP3/Caspase-1 signaling pathway. First, permanent middle cerebral artery occlusion (p-MCAO) rat model was established, followed by the measurement of behavioral deficit, neuronal injury, the volume of brain edema and the infarct size. Dex treatment was suggested to alleviate the neurological deficits in p-MCAO rats and reduce the brain water content and infarct size. Additionally, rat microglia were cultured in vitro and a model of oxygen and glucose (OGD) was established. Microglia cell activity and ultrastructure were detected. Dex could increase cell activity and reduce LDH activity, partially reversing the changes in cell morphology. Furthermore, the activation of P2X7R/NLRP3/Caspase-1 pathway was tested. The obtained findings indicated Dex suppressed microglial pyroptosis by inhibiting the P2X7R/NLRP3/Caspase-1 pathway. Inhibition of P2X7R or NLRP3 could inhibit Caspase-1 p10 expression, improve cell activity, and reduce LDH activity. The same result was verified in vivo experiments. This study indicated that Dex inhibited microglia pyroptosis by blocking the P2X7R/NLRP3/Caspase-1 pathway, thus playing a protective role against ischemic brain injury.
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Affiliation(s)
- Ke Sun
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Jiangang Zhang
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Qingcheng Yang
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China.
| | - Jinzhao Zhu
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Xiangdong Zhang
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Kun Wu
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Zhenhua Li
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Weizheng Xie
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
| | - Xue Luo
- Department of Neurology, Anyang People's Hospital, Anyang, Henan, 455000, China
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10
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Dong S, Lyu X, Yuan S, Wang S, Li W, Chen Z, Yu H, Li F, Jiang Q. Oxidative stress: A critical hint in ionizing radiation induced pyroptosis. RADIATION MEDICINE AND PROTECTION 2020. [DOI: 10.1016/j.radmp.2020.10.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
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11
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Su W, Chen Y, Cao P, Chen Y, Guo Y, Wang S, Dong W. Fusobacterium nucleatum Promotes the Development of Ulcerative Colitis by Inducing the Autophagic Cell Death of Intestinal Epithelial. Front Cell Infect Microbiol 2020; 10:594806. [PMID: 33330137 PMCID: PMC7728699 DOI: 10.3389/fcimb.2020.594806] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 10/30/2020] [Indexed: 12/21/2022] Open
Abstract
There is a growing body of evidence which suggests that intestinal microbiota, especially Fusobacterium nucleatum (F. nucleatum), are associated with intestinal immune disease such as ulcerative colitis (UC). The mechanism by which F. nucleatum promotes intestinal epithelial cell (IEC) death remained undefined. Here, we investigated the potential mechanisms about how F. nucleatum aggravates IEC death in UC. We first detected the abundance of F. nucleatum in UC tissues and analyzed its relationship with the clinical characteristics of UC. Next, we explored whether F. nucleatum promotes intestinal epithelial cell death in vitro and in vivo. Furthermore, we extracted lipopolysaccharide (LPS) of the F. nucleatum and examined whether F. nucleatum exacerbates UC via LPS. Our results indicated that F. nucleatum was abundant in UC tissues and was correlated with clinical characteristics. In addition, we demonstrated that F. nucleatum and its LPS aggravated IEC death by promoted IEC autophagy. Furthermore, autophagy inhibitors, chloroquine (CQ), 3-methyladenine (3-MA) or Atg5 silencing prevented IEC death mediated by F. nucleatum, which suggests F. nucleatum may contribute to UC by activating autophagic cell death. All our results uncover a vital role of F. nucleatum in autophagic cell death and UC, giving rise to a new sight for UC therapy by inhibiting excessive IEC autophagy and autophagic cell death.
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Affiliation(s)
- Wenhao Su
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yongyu Chen
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Pan Cao
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yan Chen
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Yuanmei Guo
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Siwei Wang
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
| | - Weiguo Dong
- Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.,Key Laboratory of Hubei Province for Digestive System Disease, Renmin Hospital of Wuhan University, Wuhan, China
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12
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Cornelius DC, Travis OK, Tramel RW, Borges-Rodriguez M, Baik CH, Greer M, Giachelli CA, Tardo GA, Williams JM. NLRP3 inflammasome inhibition attenuates sepsis-induced platelet activation and prevents multi-organ injury in cecal-ligation puncture. PLoS One 2020; 15:e0234039. [PMID: 32555710 PMCID: PMC7299389 DOI: 10.1371/journal.pone.0234039] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/06/2020] [Indexed: 12/27/2022] Open
Abstract
Sepsis is characterized by organ dysfunction due to a dysregulated immune response to infection. Currently, no effective treatment for sepsis exists. Platelets are recognized as mediators of the immune response and may be a potential therapeutic target for the treatment of sepsis. We previously demonstrated that NLRP3 inflammasome activation in sepsis-induced activated platelets was associated with multi-organ injury in the cecal-ligation puncture (CLP) rat model of sepsis. In this study, we tested the hypothesis that inhibition of NLRP3 would inhibit platelet activation and attenuate multi-organ injury in the CLP rat. CLP (n = 10) or Sham (n = 10) surgery were performed in male and female Sprague-Dawley rats. A subset of CLP rats were treated with MCC950 (50mg/kg/d), a specific NLRP3 inhibitor (CLP+MCC950, n = 10). At 72 hrs. post-CLP, blood and organs were harvested for analysis of platelet activation, NLRP3 activation, inflammation and end organ damage. Platelet activation increased from 8±0.8% in Sham to 16±1% in CLP, and was reduced to 9±1% in CLP+M rats (p<0.05). NLRP3 activation was also increased in platelets of CLP vs Sham. NLRP3 expression was unchanged in kidney and lung after CLP, but Caspase 1 expression and IL-1β were increased. MCC950 treatment attenuated NLRP3 activation in platelets. Plasma, kidney, and lung levels of NLRP3 inflammasome associated cytokines, IL-1ß and IL-18, were significantly increased in CLP compared to Sham rats. Inhibition of NLRP3 normalized cytokine levels. Glomerular injury, pulmonary edema, and endothelial dysfunction markers were increased in CLP rats vs Sham. MCC950 treatment significantly decreased renal and pulmonary injury and endothelial dysfunction in CLP+M. Our results demonstrate a role for NLRP3 in contributing to platelet activation and multi-organ injury in sepsis.
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Affiliation(s)
- Denise C. Cornelius
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Department of Pharmacology & Toxicology, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Cardiovascular-Renal Research Center, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- * E-mail:
| | - Olivia K. Travis
- Department of Pharmacology & Toxicology, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Cardiovascular-Renal Research Center, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Robert W. Tramel
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Marivee Borges-Rodriguez
- Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Cedar H. Baik
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Mallory Greer
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Chelsea A. Giachelli
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Geilda A. Tardo
- Department of Emergency Medicine, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
| | - Jan M. Williams
- Department of Pharmacology & Toxicology, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
- Cardiovascular-Renal Research Center, University of Mississippi Medical Center, Jackson, Mississippi, United States of America
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13
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Skirecki T, Cavaillon JM. Inner sensors of endotoxin – implications for sepsis research and therapy. FEMS Microbiol Rev 2019; 43:239-256. [DOI: 10.1093/femsre/fuz004] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 01/24/2019] [Indexed: 12/12/2022] Open
Affiliation(s)
- Tomasz Skirecki
- Laboratory of Flow Cytometry and Department of Anesthesiology and Intensive Care Medicine, Centre of Postgraduate Medical Education, Marymoncka 99/103 Street, 01–813 Warsaw, Poland
| | - Jean-Marc Cavaillon
- Experimental Neuropathology Unit, Institut Pasteur, 28 rue Dr. Roux, 75015 Paris, France
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Activation of PD-1 Protects Intestinal Immune Defense Through IL-10/miR-155 Pathway After Intestinal Ischemia Reperfusion. Dig Dis Sci 2018; 63:3307-3316. [PMID: 30206757 DOI: 10.1007/s10620-018-5282-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 09/08/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND To date, mechanisms of intestinal immunoglobulin (Ig) dysfunction following intestinal ischemia/reperfusion (I/R) remain unclear. Programmed death 1 (PD-1) is associated with immune responses of lymphocytes. AIM We aimed to verify the hypothesis that activation of PD-1 may improve intestinal immune dysfunction by regulating IL-10/miR-155 production after intestinal IR injury. METHODS Intestinal I/R injury was induced in mice by clamping the superior mesenteric artery for 1 h followed by 2-h reperfusion. PD-L1 fusion Ig, anti-interleukin (IL)-10 monoclonal antibody (mAb), and microRNA (miR)-155 agomir were administered. PD-1 expression, IL-10 mRNA, and protein expression in Peyer's patches (PP) CD4+ cells were measured. MiR-155 levels, tumor necrosis factor (TNF)-α and IL-1β concentration, and activation-induced cytidine deaminase (AID), a key enzyme for intestinal immune antibodies, in PP tissues were measured, respectively. Importantly, the production and cecal bacteria-binding capacity of IgA and IgM were detected. RESULTS Intestinal I/R led to decreased PD-1 expression, imbalanced production, and impaired bacteria-binding capacity of IgA and IgM. Activating PD-1 by PD-L1 Ig facilitated IL-10 synthesis, then decreased miR-155 levels, and subsequently promoted AID expression and reduced TNF-α, IL-1β concentration. Upregulation of AID improved the disruptions of intestinal immune barrier caused by IgA and IgM dysfunction. Anti-IL-10 mAb and miR-155 agomir abolished the protective effects of PD-L1 Ig on the intestinal immune defense. CONCLUSION Activation of PD-1 with PD-L1 Ig relieves intestinal immune defensive injury through IL-10/miR-155 pathway following intestinal I/R attack. PD-1, IL-10, and miR-155 may be potential targets for the damages of intestinal barrier and immunity.
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Li Z, Wang G, Feng D, Zu G, Li Y, Shi X, Zhao Y, Jing H, Ning S, Le W, Yao J, Tian X. Targeting the miR-665-3p-ATG4B-autophagy axis relieves inflammation and apoptosis in intestinal ischemia/reperfusion. Cell Death Dis 2018; 9:483. [PMID: 29706629 PMCID: PMC5924757 DOI: 10.1038/s41419-018-0518-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 03/20/2018] [Accepted: 03/22/2018] [Indexed: 02/08/2023]
Abstract
Autophagy is an essential cytoprotective response against pathologic stresses that selectively degrades damaged cellular components. Impaired autophagy contributes to organ injury in multiple diseases, including ischemia/reperfusion (I/R), but the exact mechanism by which impaired autophagy is regulated remains unclear. Several researchers have demonstrated that microRNAs (miRNAs) negatively regulate autophagy by targeting autophagy-related genes (ATGs). Therefore, the effect of ATG-related miRNAs on I/R remains a promising research avenue. In our study, we found that autophagy flux is impaired during intestinal I/R. A miRNA microarray analysis showed that miR-665-3p was highly expressed in the I/R group, which was confirmed by qRT-PCR. Then, we predicted and proved that miR-665-3p negatively regulates ATG4B expression in Caco-2 and IEC-6 cells. In ileum biopsy samples from patients with intestinal infarction, there was an inverse correlation between miR-665-3p and ATG4B expression, which supports the in vitro findings. Moreover, based on miR-665-3p regulation of autophagy in response to hypoxia/reoxygenation in vitro, gain-of-function and loss-of-function approaches were used to investigate the therapeutic potential of miR-665-3p. Additionally, we provide evidence that ATG4B is indispensable for protection upon inhibition of miR-665-3p. Finally, we observed that locked nucleic acid-modified inhibition of miR-665-3p in vivo alleviates I/R-induced systemic inflammation and apoptosis via recovery of autophagic flux. Our study highlights miR-665-3p as a novel small molecule that regulates autophagy by targeting ATG4B, suggesting that miR-665-3p inhibition may be a potential therapeutic approach against inflammation and apoptosis for the clinical treatment of intestinal I/R.
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Affiliation(s)
- Zhenlu Li
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Guangzhi Wang
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Dongcheng Feng
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Guo Zu
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Yang Li
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Xue Shi
- Department of Pharmacology, Dalian Medical University, 116044, Dalian, China
| | - Yan Zhao
- Department of Pharmacology, Dalian Medical University, 116044, Dalian, China
| | - Huirong Jing
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Shili Ning
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China
| | - Weidong Le
- Clinical Research Center on Neurological Diseases, the First Affiliated Hospital of Dalian Medical University, 116011, Dalian, China
| | - Jihong Yao
- Department of Pharmacology, Dalian Medical University, 116044, Dalian, China.
| | - Xiaofeng Tian
- Department of General Surgery, The Second Hospital of Dalian Medical University, 116023, Dalian, China.
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