1
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Chen P, Chen J, Ye J, Yang L. Identification of an Immune-Related Gene Diagnostic Model and Potential Drugs in Sepsis Using Bioinformatics and Pharmacogenomics Approaches. Infect Drug Resist 2023; 16:5665-5680. [PMID: 37662976 PMCID: PMC10473429 DOI: 10.2147/idr.s418176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/17/2023] [Indexed: 09/05/2023] Open
Abstract
Purpose Sepsis is an organ dysfunction with high mortality. Early identification, diagnosis, and effective treatment of sepsis are beneficial to the survival of patients. This study aimed to find potential diagnosis and immune-related genes, and drug targets, which could provide novel diagnostic and therapeutic markers for sepsis. Patients and Methods The GSE69063, GSE154918 and GSE28750 datasets were integrated to evaluate immune infiltration and identify differentially expressed genes (DEGs) and immune-related genes. Weighted gene co-expression network analysis (WGCNA) was applied to find the hub module related to immune score and sepsis. Immune-related key genes were screened out by taking interaction of DEGs, immune-related genes, and genes in hub module. Protein-protein interaction (PPI) analysis was used to further screen immune-related hub genes, followed by construction of a diagnostic model based on immune-related hub genes. Functional analysis and drug prediction of immune-related hub genes were, respectively, performed by David software and DGIdb database, followed by expression validation by reverse transcriptase polymerase chain reaction (RT-PCR). Results Totally, 93 immune-related key genes were identified between 561 DEGs, 1793 immune-related genes and 12,459 genes in the hub module of WGCNA. Through PPI analysis, a total of 5 diagnose and immune-related hub genes were further obtained, including IL7R, IL10, CD40LG, CD28 and LCN2. Relationship pairs between these 5 genes and immune cell were identified, including LCN2/IL7R/CD28-activated dendritic cell and IL10-immature B cell. Based on pharmacogenomics, 17 candidate drugs might interact with IL 10, including CYCLOSPORINE. Six candidate drugs might interact with CD28 and 11 with CD40LG, CD40LG and CD28 were drug targets of ALDESLEUKIN. Four significantly enriched signaling pathways were identified, such as T cell receptor signaling pathway, NF-kappa B signaling pathway and JAK-STAT signaling pathway. Conclusion The 5-gene diagnostic model could be used to diagnose and guide clinical immunotherapy for sepsis.
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Affiliation(s)
- Peng Chen
- Department of Urology, General Hospital of Northern Theater Command PLA, Shenyang, People’s Republic of China
| | - Juan Chen
- Department of Oncology, General Hospital of Northern Theater Command PLA, Shenyang, People’s Republic of China
| | - Jinghe Ye
- Department of Urology, General Hospital of Northern Theater Command PLA, Shenyang, People’s Republic of China
| | - Limin Yang
- Department of Urology, General Hospital of Northern Theater Command PLA, Shenyang, People’s Republic of China
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2
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Muske J, Knoop K. Contributions of the microbiota to the systemic inflammatory response. MICROBIOTA AND HOST 2023; 1:e230018. [PMID: 38872988 PMCID: PMC11170979 DOI: 10.1530/mah-23-0018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
The health of the intestinal microbiota impacts tolerance at homeostasis and the strength of the inflammation response during acute bloodstream infections. A complete understanding of the feedback loop between systemic inflammation and dysregulation of the gut microbiota is necessary for inflammation management. Here we will review the many ways in which the microbiota can influence the systemic pro-inflammatory response. Short-chain fatty acids, produced through the microbial metabolism of dietary fibers, can suppress inflammation systemically; in the absence of a balanced diet or disruption of the microbiota through antibiotics, there is disrupted metabolite production, leading to systemic inflammation. Dysbiosis or inflammation in the intestines can lead to a breakdown of the sturdy intestinal-epithelial barrier. When this barrier is perturbed, immunogenic lipopolysaccharides or extracellular vesicles enter the bloodstream and induce excessive inflammation. Necessary clinical treatments, such as antifungals or antibacterials, induce microbiota dysregulation and thus increased risk of endotoxemia; though probiotics may aid in improving the microbiota health and have been shown to deflate inflammation during sepsis. Within this complicated relationship: What is in control, the dysbiotic microbiota or the systemic inflammation?
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Affiliation(s)
- Josey Muske
- Mayo Graduate School of Biomedical Sciences
- Department of Immunology, Mayo Clinic Rochester, MN USA
| | - Kathryn Knoop
- Department of Immunology, Mayo Clinic Rochester, MN USA
- Department of Pediatrics, Mayo Clinic Rochester, MN USA
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3
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Pritchard KA, Jing X, Teng M, Wells C, Jia S, Afolayan AJ, Jarzembowski J, Day BW, Naylor S, Hessner MJ, Konduri GG, Teng RJ. Role of endoplasmic reticulum stress in impaired neonatal lung growth and bronchopulmonary dysplasia. PLoS One 2022; 17:e0269564. [PMID: 36018859 PMCID: PMC9417039 DOI: 10.1371/journal.pone.0269564] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 05/24/2022] [Indexed: 11/18/2022] Open
Abstract
Myeloperoxidase (MPO), oxidative stress (OS), and endoplasmic reticulum (ER) stress are increased in the lungs of rat pups raised in hyperoxia, an established model of bronchopulmonary dysplasia (BPD). However, the relationship between OS, MPO, and ER stress has not been examined in hyperoxia rat pups. We treated Sprague-Dawley rat pups with tunicamycin or hyperoxia to determine this relationship. ER stress was detected using immunofluorescence, transcriptomic, proteomic, and electron microscopic analyses. Immunofluorescence observed increased ER stress in the lungs of hyperoxic rat BPD and human BPD. Proteomic and morphometric studies showed that tunicamycin directly increased ER stress of rat lungs and decreased lung complexity with a BPD phenotype. Previously, we showed that hyperoxia initiates a cycle of destruction that we hypothesized starts from increasing OS through MPO accumulation and then increases ER stress to cause BPD. To inhibit ER stress, we used tauroursodeoxycholic acid (TUDCA), a molecular chaperone. To break the cycle of destruction and reduce OS and MPO, we used N-acetyl-lysyltyrosylcysteine amide (KYC). The fact that TUDCA improved lung complexity in tunicamycin- and hyperoxia-treated rat pups supports the idea that ER stress plays a causal role in BPD. Additional support comes from data showing TUDCA decreased lung myeloid cells and MPO levels in the lungs of tunicamycin- and hyperoxia-treated rat pups. These data link OS and MPO to ER stress in the mechanisms mediating BPD. KYC's inhibition of ER stress in the tunicamycin-treated rat pup's lung provides additional support for the idea that MPO-induced ER stress plays a causal role in the BPD phenotype. ER stress appears to expand our proposed cycle of destruction. Our results suggest ER stress evolves from OS and MPO to increase neonatal lung injury and impair growth and development. The encouraging effect of TUDCA indicates that this compound has the potential for treating BPD.
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Affiliation(s)
- Kirkwood A. Pritchard
- Division of Pediatric Surgery, Department of Surgery, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Xigang Jing
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Michelle Teng
- Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Clive Wells
- Electron Microscope Facility, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Shuang Jia
- Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Adeleye J. Afolayan
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Jason Jarzembowski
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Division of Pediatric Pathology, Department of Pathology, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Billy W. Day
- ReNeuroGen L.L.C. Milwaukee, Elm Grove, Wisconsin, United States of America
| | - Stephen Naylor
- ReNeuroGen L.L.C. Milwaukee, Elm Grove, Wisconsin, United States of America
| | - Martin J. Hessner
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - G. Ganesh Konduri
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America
| | - Ru-Jeng Teng
- Children’s Research Institute, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,Department of Pediatrics, Medical College of Wisconsin, Wauwatosa, Wisconsin, United States of America,* E-mail:
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4
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Li C, He YY, Zhang YT, You YC, Yuan HY, Wei YG, Chen X, Chen J. Tauroursodeoxycholic acid (TUDCA) disparate pharmacological effects to lung tissue-resident memory T cells contribute to alleviated silicosis. Biomed Pharmacother 2022; 151:113173. [PMID: 35623165 DOI: 10.1016/j.biopha.2022.113173] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/16/2022] [Accepted: 05/22/2022] [Indexed: 11/02/2022] Open
Abstract
Exposure to crystalline silica (CS) results in a persistent pulmonary inflammatory response, which results in abnormal tissue repair and excessive matrix deposition. Due to vague pathogenesis, there is virtually no practical therapeutic approach. Here we showed the pharmacological effects of TUDCA on CS-induced pulmonary inflammation and fibrosis. It also helped a faster recovery of CS-impaired pulmonary function. Mechanistically, TUDCA suppressed interferon (IFN)-γ and interleukin (IL)-17A productions by pulmonary helper T (Th) cells. We demonstrated that CS-boosted cytokine-producing Th cells were effector memory (TEM) phenotype. TUDCA decreased the pathogenic TEM cells expansion in the lung. Using in vivo labeling method, we discovered the TEM cells were lung tissue residency with CD103 expression. TUDCA's anti-fibrotic effects were linked to decreasing IFN-γ producing CD103- TEM-like and IL-17A producing CD103+ TRM-like T cells as well as restricting TRM-like Treg cells in the lung. Specifically, TUDCA could restrain CD103+ TRM-like Treg cell proliferation but not limit the CD103- ones. Further characterization study proved that though the Tregs originally came from the thymus, the expressing levels of ST-2 were different, which provides insights into TUDCA's various effects on cell proliferation. Collectively, our data paved the way to understanding the pathogenesis of silicosis and may provide new treatments for this pulmonary fibrotic disease.
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Affiliation(s)
- Chao Li
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China.
| | - Yang-Yang He
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Yu-Ting Zhang
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Yi-Chuan You
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Hao-Yang Yuan
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Yun-Geng Wei
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Xi Chen
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China
| | - Jie Chen
- Division of Pneumoconiosis, School of Public Health, China Medical University, No. 77 Puhe Road, Shenyang North New Area, Shenyang 110122, China.
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5
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Bim Deletion Reduces Functional Deficits Following Ischemic Stroke in Association with Modulation of Apoptosis and Inflammation. Neuromolecular Med 2022; 24:405-414. [PMID: 35149957 DOI: 10.1007/s12017-022-08703-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 01/31/2022] [Indexed: 12/17/2022]
Abstract
Cellular apoptosis is a key pathological mechanism contributing to neuronal death following ischemic stroke. The pro-apoptotic Bcl-2 family protein, Bim, is an important regulator of apoptosis. In this study we investigated the effect of Bim expression on post-stroke functional outcomes, brain injury and inflammatory mechanisms. Wild type (WT) and Bim-deficient mice underwent 1-h middle cerebral artery occlusion (MCAO) followed by 23 h of reperfusion. At 24-h post-stroke, we assessed functional deficit, infarct volume, immune cell death, as well as the number of infiltrating immune cells in the brain and circulating immune cells. Bim deficiency did not affect infarct volume (P > 0.05), but resulted in less motor impairment (~ threefold greater latency to fall in hanging grip strength test, P < 0.05) and a lower median clinical score than WT mice (P < 0.05). Additionally following MCAO, Bim-deficient mice exhibited fewer myeloid cells (particularly neutrophils) in the ischemic brain hemisphere and less apoptosis of CD3+ T cells in the spleen and thymus compared with WT (all P < 0.05). After MCAO, Bim-deficient mice also tended to have more M2-polarised macrophages in the brain than WT mice. In sham-operated mice, we found that Bim deficiency resulted in greater numbers of circulating total CD45+ leukocytes, Ly6Clo+ monocytes and CD3+ T cells, although MCAO did not affect the number of circulating cells at 24 h in either genotype. Our findings suggest that Bim deficiency modulates post-stroke outcomes, including reductions in motor impairment, brain inflammation and systemic post-stroke leukocyte apoptosis. Bim could therefore serve as a potential therapeutic target for stroke.
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6
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Nedeva C. Inflammation and Cell Death of the Innate and Adaptive Immune System during Sepsis. Biomolecules 2021; 11:1011. [PMID: 34356636 PMCID: PMC8301842 DOI: 10.3390/biom11071011] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/05/2021] [Accepted: 07/09/2021] [Indexed: 12/23/2022] Open
Abstract
Sepsis is a life-threatening medical condition that occurs when the host has an uncontrolled or abnormal immune response to overwhelming infection. It is now widely accepted that sepsis occurs in two concurrent phases, which consist of an initial immune activation phase followed by a chronic immunosuppressive phase, leading to immune cell death. Depending on the severity of the disease and the pathogen involved, the hosts immune system may not fully recover, leading to ongoing complications proceeding the initial infection. As such, sepsis remains one of the leading causes of morbidity and mortality world-wide, with treatment options limited to general treatment in intensive care units (ICU). Lack of specific treatments available for sepsis is mostly due to our limited knowledge of the immuno-physiology associated with the disease. This review will provide a comprehensive overview of the mechanisms and cell types involved in eliciting infection-induced immune activation from both the innate and adaptive immune system during sepsis. In addition, the mechanisms leading to immune cell death following hyperactivation of immune cells will be explored. The evaluation and better understanding of the cellular and systemic responses leading to disease onset could eventuate into the development of much needed therapies to combat this unrelenting disease.
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Affiliation(s)
- Christina Nedeva
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, VIC 3086, Australia
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7
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Aslan M, Elpek Ö, Akkaya B, Balaban HT, Afşar E. Organ function, sphingolipid levels and inflammation in tunicamycin induced endoplasmic reticulum stress in male rats. Hum Exp Toxicol 2021; 40:259-273. [PMID: 33527851 DOI: 10.1177/0960327120949619] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Disorders of the endoplasmic reticulum (ER) lead to cellular damage but can cause cell death if ER dysfunction is prolonged. We aimed to examine liver/kidney functions, neutral sphingomyelinase (N-SMase) activity, sphingolipid levels, cytosolic phospholipase A2 (cPLA2) and cyclooxygenase-2 (COX-2) protein expression in rats under ER stress. ER stress was induced by tunicamycin (TM) and the ER stress inhibitor taurodeoxycholic acid (TUDCA) was injected before induction of ER stress. ER stress was confirmed by increased tissue levels of GRP78. Hematological and biochemical profiles were measured by autoanalyzers while hepatic and renal injury was evaluated via microscopy and histopathological scoring. Tissue levels of C16-C24 sphingomyelins (SM), C16-C24 ceramides (CERs) and sphingosine-1-phosphate (S1P) were determined by LC-MS/MS. Tissue cPLA2 and COX-2 were measured by western blot and activity assays. Tunicamycin treatment caused kidney and liver function test abnormalities, increased hematocrit and hemoglobin levels but decreased white blood cell counts. Histopathological findings showed hepatic necroinflammation and renal tubular damage in rats treated with TM. TUDCA administration attenuated WBC abnormalities and TM- induced hepatic/renal functional impairment in ER stress, as evident by significantly restored serum ALT, AST, creatinine, and total bilirubin levels. A significant increase was observed in N-SMase activity, tissue levels of C16-C24 CERs, cPLA2 and COX-2 expression in liver and kidney tissue under ER stress. TUDCA administration decreased tissue CER levels, cPLA2 and COX-2 expression as well as prostaglandin E2 (PGE2) formation. These results signify that ER stress causes hepatic and renal toxicity as well as CER-induced PGE2 formation in liver and kidney.
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Affiliation(s)
- Mutay Aslan
- Department of Medical Biochemistry, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Özlem Elpek
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Bahar Akkaya
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Hazal Tuzcu Balaban
- Department of Pathology, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
| | - Ebru Afşar
- Department of Medical Biochemistry, 64032Akdeniz University Faculty of Medicine, Antalya, Turkey
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8
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Cuevas E, Burks S, Raymick J, Robinson B, Gómez-Crisóstomo NP, Escudero-Lourdes C, Lopez AGG, Chigurupati S, Hanig J, Ferguson SA, Sarkar S. Tauroursodeoxycholic acid (TUDCA) is neuroprotective in a chronic mouse model of Parkinson's disease. Nutr Neurosci 2020; 25:1374-1391. [PMID: 33345721 DOI: 10.1080/1028415x.2020.1859729] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
OBJECTIVE Parkinson's disease (PD) is a progressive motor disease of unknown etiology. Although neuroprotective ability of endogenous bile acid, tauroursodeoxycholic acid (TUDCA), shown in various diseases, including an acute model of PD,the potential therapeutic role of TUDCA in progressive models of PD that exhibit all aspects of PD has not been elucidated. In the present study, mice were assigned to one of four treatment groups: (1) Probenecid (PROB); (2) TUDCA, (3) MPTP + PROB (MPTPp); and (3) TUDCA + MPTPp. Methods: Markers for dopaminergic function, neuroinflammation, oxidative stress and autophagy were assessed using high performance liquid chromatography (HPLC), immunohistochemistry (IHC) and western blot (WB) methods. Locomotion was measured before and after treatments. Results: MPTPp decreased the expression of dopamine transporters (DAT) and tyrosine hydroxylase (TH), indicating dopaminergic damage, and induced microglial and astroglial activation as demonstrated by IHC analysis. MPTPp also decreased DA and its metabolites as demonstrated by HPLC analysis. Further, MPTPp-induced protein oxidation; increased LAMP-1 expression indicated autophagy and the promotion of alpha-synuclein (α-SYN) aggregation.. Discussion: Pretreatment with TUDCA protected against dopaminergic neuronal damage, prevented the microglial and astroglial activation, as well as the DA and DOPAC reductions caused by MPTPp. TUDCA by itself did not produce any significant change, with data similar to the negative control group. Pretreatment with TUDCA prevented protein oxidation and autophagy, in addition to inhibiting α-SYN aggregation. Although TUDCA pretreatment did not significantly affect locomotion, only acute treatment effects were measured, indicating more extensive assessments may be necessary to reveal potential therapeutic effects on behavior. Together, these results suggest that autophagy may be involved in the progression of PD and that TUDCA may attenuate these effects. The efficacy of TUDCA as a novel therapy in patients with PD clearly warrants further study.
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Affiliation(s)
- Elvis Cuevas
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | - Susan Burks
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | - James Raymick
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | - Bonnie Robinson
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | | | | | | | - Srinivasulu Chigurupati
- Office of Regulatory Affairs, Office of Regulatory Science, Food and Drug Administration, Rockville, MD, USA
| | - Joseph Hanig
- Office of Testing & Research, CDER/FDA, White Oak, MD, USA
| | - Sherry A Ferguson
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
| | - Sumit Sarkar
- Division of Neurotoxicology, National Center for Toxicological Research/FDA, Jefferson, AR, USA
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9
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Doerflinger M, Reljic B, Menassa J, Nedeva C, Jose I, Faou P, Mackiewicz L, Mansell A, Pellegrini M, Hotchkiss R, Puthalakath H. Circulating BiP/Grp78 is a novel prognostic marker for sepsis-mediated immune cell death. FEBS J 2020; 288:1809-1821. [PMID: 32894892 DOI: 10.1111/febs.15552] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/23/2020] [Accepted: 09/01/2020] [Indexed: 12/13/2022]
Abstract
Sepsis remains to be a major contributor to mortality in ICUs, and immune suppression caused by immune cell apoptosis determines the overall patient survival. However, diagnosis of sepsis-induced lymphopenia remains problematic with no accurate prognostic techniques or biomarkers for cell death available. Developing reliable prognostic tools for sepsis-mediated cell death is not only important for identifying patients at increased risk of immune suppression but also to monitor treatment progress of currently trialed immunotherapy strategies. We have previously shown an important role for endoplasmic reticulum stress (ER stress) in inducing sepsis-mediated cell death and here report on the identification of a secreted form of the ER chaperone BiP (immunoglobulin binding protein) as a novel circulating prognostic biomarker for immune cell death and ER stress during sepsis. Using biochemical purification and mass spectrometry coupled with an established in vitro sepsis cell death assay, we identified BiP/Grp78 as a factor secreted by lipopolysaccharide-activated macrophages that is capable of inducing cell death in target cells. Quantitative ELISA analysis showed significantly elevated levels of circulating BiP in mice undergoing polymicrobial sepsis, which was absent in Bim-/- mice that are protected from sepsis-induced lymphopenia. Using blood serum from human sepsis patients, we could detect a significant difference in levels of secreted BiP in sepsis patients compared to nonseptic controls, suggesting that secreted circulating BiP could indeed be used as a prognostic marker that is directly correlative to immune cell death during sepsis.
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Affiliation(s)
- Marcel Doerflinger
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia.,Biochemistry and Molecular Biology, Clayton, Vic., Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Vic., Australia
| | - Boris Reljic
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia.,Biochemistry and Molecular Biology, Clayton, Vic., Australia
| | - Joseph Menassa
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia
| | - Christina Nedeva
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia
| | - Irvin Jose
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia
| | - Pierre Faou
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia
| | - Liana Mackiewicz
- Biochemistry and Molecular Biology, Clayton, Vic., Australia.,Department of Medical Biology, The University of Melbourne, Melbourne, Vic., Australia
| | - Ashley Mansell
- Hudson Institute of Medical Research, Clayton, Vic., Australia
| | - Marc Pellegrini
- Biochemistry and Molecular Biology, Clayton, Vic., Australia
| | - Richard Hotchkiss
- Department of Pediatrics and Department of Anesthesiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Hamsa Puthalakath
- Department of Biochemistry and Genetics, La Trobe University, Melbourne, Vic., Australia
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10
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Tauroursodeoxycholic acid prevents ER stress-induced apoptosis and improves cerebral and vascular function in mice subjected to subarachnoid hemorrhage. Brain Res 2020; 1727:146566. [DOI: 10.1016/j.brainres.2019.146566] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Revised: 11/20/2019] [Accepted: 11/21/2019] [Indexed: 12/15/2022]
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11
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TUDCA attenuates intestinal injury and inhibits endoplasmic reticulum stress-mediated intestinal cell apoptosis in necrotizing enterocolitis. Int Immunopharmacol 2019; 74:105665. [DOI: 10.1016/j.intimp.2019.05.050] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/20/2019] [Accepted: 05/26/2019] [Indexed: 01/06/2023]
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12
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Liu C, Oveissi S, Downs R, Kirby J, Nedeva C, Puthalakath H, Faou P, Duan M, Chen W. Semiquantitative Proteomics Enables Mapping of Murine Neutrophil Dynamics following Lethal Influenza Virus Infection. THE JOURNAL OF IMMUNOLOGY 2019; 203:1064-1075. [PMID: 31308090 DOI: 10.4049/jimmunol.1900337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Accepted: 06/17/2019] [Indexed: 12/31/2022]
Abstract
Neutrophils are rapidly deployed innate immune cells, and excessive recruitment is causally associated with influenza-induced pathologic conditions. Despite this, the complete set of influenza lethality-associated neutrophil effector proteins is currently unknown. Whether the expression of these proteins is predetermined during bone marrow (BM) neutrophil maturation or further modulated by tissue compartment transitions has also not been comprehensively characterized at a proteome-wide scale. In this study, we used high-resolution mass spectrometry to map how the proteomes of murine neutrophils change comparatively across BM, blood, and the alveolar airspaces to deploy an influenza lethality-associated response. Following lethal influenza infection, mature neutrophils undergo two infection-dependent and one context-independent compartmental transitions. Translation of type I IFN-stimulated genes is first elevated in the BM, preceding the context-independent downregulation of ribosomal proteins observed in blood neutrophils. Following alveolar airspace infiltration, the bronchoalveolar lavage (BAL) neutrophil proteome is further characterized by a limited increase in type I IFN-stimulated and metal-sequestering proteins as well as a decrease in degranulation-associated proteins. An influenza-selective and dose-dependent increase in antiviral and lipid metabolism-associated proteins was also observed in BAL neutrophils, indicative of a modest capacity for pathogen response tuning. Altogether, our study provides new and comprehensive evidence that the BAL neutrophil proteome is shaped by BM neutrophil maturation as well as subsequent compartmental transitions following lethal influenza infection.
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Affiliation(s)
- Chuanxin Liu
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Sara Oveissi
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Rachael Downs
- La Trobe Comprehensive Proteomics Platform, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia; and
| | - Jason Kirby
- Land and Water, Commonwealth Scientific and Industrial Research Organisation, Urrbrae, South Australia 5064, Australia
| | - Christina Nedeva
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Hamsa Puthalakath
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Pierre Faou
- La Trobe Comprehensive Proteomics Platform, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia; and
| | - Mubing Duan
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia;
| | - Weisan Chen
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Bundoora, Victoria 3086, Australia;
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De Miguel C, Sedaka R, Kasztan M, Lever JM, Sonnenberger M, Abad A, Jin C, Carmines PK, Pollock DM, Pollock JS. Tauroursodeoxycholic acid (TUDCA) abolishes chronic high salt-induced renal injury and inflammation. Acta Physiol (Oxf) 2019; 226:e13227. [PMID: 30501003 DOI: 10.1111/apha.13227] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 10/23/2018] [Accepted: 11/22/2018] [Indexed: 12/23/2022]
Abstract
AIM Chronic high salt intake exaggerates renal injury and inflammation, especially with the loss of functional ETB receptors. Tauroursodeoxycholic acid (TUDCA) is a chemical chaperone and bile salt that is approved for the treatment of hepatic diseases. Our aim was to determine whether TUDCA is reno-protective in a model of ETB receptor deficiency with chronic high salt-induced renal injury and inflammation. METHODS ETB -deficient and transgenic control rats were placed on normal (0.8% NaCl) or high salt (8% NaCl) diet for 3 weeks, receiving TUDCA (400 mg/kg/d; ip) or vehicle. Histological and biochemical markers of kidney injury, renal cell death and renal inflammation were assessed. RESULTS In ETB -deficient rats, high salt diet significantly increased glomerular and proximal tubular histological injury, proteinuria, albuminuria, excretion of tubular injury markers KIM-1 and NGAL, renal cortical cell death and renal CD4+ T cell numbers. TUDCA treatment increased proximal tubule megalin expression as well as prevented high salt diet-induced glomerular and tubular damage in ETB -deficient rats, as indicated by reduced kidney injury markers, decreased glomerular permeability and proximal tubule brush border restoration, as well as reduced renal inflammation. However, TUDCA had no significant effect on blood pressure. CONCLUSIONS TUDCA protects against the development of glomerular and proximal tubular damage, decreases renal cell death and inflammation in the renal cortex in rats with ETB receptor dysfunction on a chronic high salt diet. These results highlight the potential use of TUDCA as a preventive tool against chronic high salt induced renal damage.
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Affiliation(s)
- Carmen De Miguel
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Randee Sedaka
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Malgorzata Kasztan
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Jeremie M. Lever
- Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Michelle Sonnenberger
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Andrew Abad
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Chunhua Jin
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Pamela K. Carmines
- Department of Cellular and Integrative Physiology University of Nebraska Medical Center Omaha Nebraska
| | - David M. Pollock
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
| | - Jennifer S. Pollock
- Section of Cardio‐Renal Physiology and Medicine, Division of Nephrology, Department of Medicine University of Alabama at Birmingham Birmingham Alabama
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Affiliation(s)
- Jason A Glab
- Department of Biochemistry & Genetics, La Trobe Institute for Molecular Science, La Trobe University, Kingsbury Drive, Bundoora, Victoria 3086, Australia
| | - Marcel Doerflinger
- Department of Biochemistry & Genetics, La Trobe Institute for Molecular Science, La Trobe University, Kingsbury Drive, Bundoora, Victoria 3086, Australia
| | - Hamsa Puthalakath
- Department of Biochemistry & Genetics, La Trobe Institute for Molecular Science, La Trobe University, Kingsbury Drive, Bundoora, Victoria 3086, Australia
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15
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Doerflinger M, Forsyth W, Ebert G, Pellegrini M, Herold MJ. CRISPR/Cas9-The ultimate weapon to battle infectious diseases? Cell Microbiol 2016; 19. [PMID: 27860197 DOI: 10.1111/cmi.12693] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 10/30/2016] [Accepted: 11/04/2016] [Indexed: 12/12/2022]
Abstract
Infectious diseases are a leading cause of death worldwide. Novel therapeutics are urgently required to treat multidrug-resistant organisms such as Mycobacterium tuberculosis and to mitigate morbidity and mortality caused by acute infections such as malaria and dengue fever virus as well as chronic infections such as human immunodeficiency virus-1 and hepatitis B virus. The clustered regularly interspaced short palindromic repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) system, which has revolutionized biomedical research, holds great promise for the identification and validation of novel drug targets. Since its discovery as an adaptive immune system in prokaryotes, the CRISPR/Cas9 system has been developed into a multi-faceted genetic modification tool, which can now be used to induce gene deletions or specific gene insertions, such as conditional alleles or endogenous reporters in virtually any organism. The generation of CRISPR/Cas9 libraries that can be used to perform phenotypic whole genome screens provides an important new tool that will aid in the identification of critical host factors involved in the pathogenesis of infectious diseases. In this review, we will discuss the development and recent applications of the CRISPR/Cas9 system used to identify novel regulators, which might become important in the fight against infectious diseases.
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Affiliation(s)
- M Doerflinger
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - W Forsyth
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia
| | - G Ebert
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - M Pellegrini
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
| | - M J Herold
- Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.,Department of Medical Biology, University of Melbourne, Parkville, VIC, Australia
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