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Yue C, Wang W, Gao S, Ye J, Zhang T, Xing Z, Xie Y, Qian H, Zhou X, Li S, Yu A, Wang L, Wang J, Hua C. Agomir miRNA-150-5p alleviates pristane-induced lupus by suppressing myeloid dendritic cells activation and inflammation via TREM-1 axis. Inflamm Res 2023:10.1007/s00011-023-01754-8. [PMID: 37326693 DOI: 10.1007/s00011-023-01754-8] [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: 04/10/2023] [Revised: 05/12/2023] [Accepted: 05/30/2023] [Indexed: 06/17/2023] Open
Abstract
OBJECTIVE Triggering receptors expressed on myeloid cells-1 (TREM-1) has been shown to participate in inflammatory autoimmune diseases. Nevertheless, the detailed underlying mechanisms and therapeutic benefits by targeting TREM-1 remain elusive, especially in myeloid dendritic cells (mDCs) and systemic lupus erythematosus (SLE). Disorders of epigenetic processes including non-coding RNAs give rise to SLE, resulting in complicated syndromes. Here, we aim to address this issue and explore the miRNA to inhibit the activation of mDCs and alleviate the progress of SLE by targeting TREM-1 signal axis. METHODS Bioinformatics methods were used to analyze the differentially expressed genes (DEGs) between patients with SLE and healthy individuals by four mRNA microarray datasets from Gene Expression Omnibus (GEO). Then we identified the expression of TREM-1 and its soluble form (sTREM-1) in clinical samples by ELISA, quantitative real-time PCR and Western blot. Phenotypic and functional changes of mDCs elicited by TREM-1 agonist were determined. Three databases of miRNAs target prediction and a dual-luciferase reporter assay were used to screen and verify miRNAs that can directly inhibit TREM-1 expression in vitro. Moreover, pristane-induced lupus mice were injected with miR-150-5p agomir to evaluate the effects of miR-150-5p on mDCs in lymphatic organs and disease activity in vivo. RESULTS We screened TREM-1 as one of the hub genes closely correlated with the progression of SLE and identified sTREM-1 in serum as a valuable diagnostic biomarker for SLE. Moreover, activation of TREM-1 by its agonist promoted activation and chemotaxis of mDCs and increased the production of inflammatory cytokines and chemokines, showing higher expression of IL-6, TNF-α, and MCP-1. We showed that lupus mice displayed a unique miRNA signature in spleen, among which miR-150 was the most significantly expressed miRNA that targeting TREM-1 compared with wild type group. Transfection of miRNA-150-5p mimics directly suppressed the expression of TREM-1 by binding to its 3' UTR. Our in vivo experiments first indicated that administration of miR-150-5p agomir effectively ameliorated lupus symptoms. Intriguingly, miR-150 inhibited the over activation of mDCs through TREM-1 signal pathway in lymphatic organs and renal tissues. CONCLUSIONS TREM-1 represents a potentially novel therapeutic target and we identify miR-150-5p as one of the mechanisms to alleviate lupus disease, which is attributable for inhibiting mDCs activation through TREM-1 signaling pathway.
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Affiliation(s)
- Chenran Yue
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Wenqian Wang
- Department of Plastic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Sheng Gao
- Laboratory Animal Center, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Jianzhong Ye
- Department of Clinical Laboratory, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Ting Zhang
- Department of Rheumatology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Zhouhang Xing
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Yuanyuan Xie
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Hengrong Qian
- School of the 2Nd Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Xueyin Zhou
- School of the 2Nd Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Shuting Li
- School of the 2Nd Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Anni Yu
- School of the 2Nd Clinical Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China
| | - Liangxing Wang
- Key Laboratory of Heart and Lung, Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China.
| | - Jianguang Wang
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China.
| | - Chunyan Hua
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou, 325035, Zhejiang Province, China.
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Badiee P, Ghasemi F, Jafarian H. Role of biomarkers in the diagnosis of invasive aspergillosis in immunocompromised patients. Ann Clin Microbiol Antimicrob 2022; 21:44. [PMID: 36320074 PMCID: PMC9628095 DOI: 10.1186/s12941-022-00539-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Accepted: 10/20/2022] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Invasive aspergillosis is one of the important causes of infection in immunocompromised patients. This study aimed to evaluate the roles of biomarkers in the diagnosis of invasive aspergillosis and their relationship with antifungal stewardship programs. METHODS 190 sera from 52 immunocompromised patients and volunteer individuals were included in this study. 18 immunocompromised volunteers without IA and 34 patients with probable and proven aspergillosis according to the European Organization for Research and Treatment of Cancer and the Mycoses Study Group consensus definitions were entered in this study. The respective sera were evaluated for procalcitonin, soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) levels; white blood cells count (WBC) count, C reactive protein (CRP), lactate dehydrogenase (LDH), and erythrocyte sedimentation rate (ESR) values. Demographic data and clinical characteristics of patients were extracted from their files. RESULTS The male-to-female ratio and mean age of patients were 22/12 and 38.9 years, respectively. The hematologic disorder was the most predisposing factor (29/34, 85.3%). Sensitivity of biomarkers for diagnosis of invasive aspergillosis was 70.6% (cut off value > 190 pg/mL for sTREM-1, 71% (cut off value > 260 pg/mL) for PCT, 85.3% (cut off value > 193 U/L) for LDH, 94.1% (cut off value > 8 mg/l) for CRP, 64.7% (cut off value < 5200 cells/ml) for WBC, and 85.3% (cut off value > 23 mm/h) for ESR. Twelve patients died, with significantly increased sTREM-1 levels and decreased WBC count in them. CONCLUSION According to our data, evaluation of the biomarkers can help in the diagnosis, management, and prediction of the severity of Aspergillus infection, and the rational use of antifungal agents in immunocompromised patients.
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Affiliation(s)
- Parisa Badiee
- grid.412571.40000 0000 8819 4698Clinical Microbiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Fatemeh Ghasemi
- grid.412571.40000 0000 8819 4698Clinical Microbiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Hadis Jafarian
- grid.412571.40000 0000 8819 4698Clinical Microbiology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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sTREM-1 Predicts Disease Severity and Mortality in COVID-19 Patients: Involvement of Peripheral Blood Leukocytes and MMP-8 Activity. Viruses 2021; 13:v13122521. [PMID: 34960790 PMCID: PMC8708887 DOI: 10.3390/v13122521] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/01/2021] [Accepted: 12/10/2021] [Indexed: 01/08/2023] Open
Abstract
Uncontrolled inflammatory responses play a critical role in coronavirus disease (COVID-19). In this context, because the triggering-receptor expressed on myeloid cells-1 (TREM-1) is considered an intrinsic amplifier of inflammatory signals, this study investigated the role of soluble TREM-1 (sTREM-1) as a biomarker of the severity and mortality of COVID-19. Based on their clinical scores, we enrolled COVID-19 positive patients (n = 237) classified into mild, moderate, severe, and critical groups. Clinical data and patient characteristics were obtained from medical records, and their plasma inflammatory mediator profiles were evaluated with immunoassays. Plasma levels of sTREM-1 were significantly higher among patients with severe disease compared to all other groups. Additionally, levels of sTREM-1 showed a significant positive correlation with other inflammatory parameters, such as IL-6, IL-10, IL-8, and neutrophil counts, and a significant negative correlation was observed with lymphocyte counts. Most interestingly, sTREM-1 was found to be a strong predictive biomarker of the severity of COVID-19 and was related to the worst outcome and death. Systemic levels of sTREM-1 were significantly correlated with the expression of matrix metalloproteinases (MMP)-8, which can release TREM-1 from the surface of peripheral blood cells. Our findings indicated that quantification of sTREM-1 could be used as a predictive tool for disease outcome, thus improving the timing of clinical and pharmacological interventions in patients with COVID-19.
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Matos ADO, Dantas PHDS, Silva-Sales M, Sales-Campos H. TREM-1 isoforms in bacterial infections: to immune modulation and beyond. Crit Rev Microbiol 2021; 47:290-306. [PMID: 33522328 DOI: 10.1080/1040841x.2021.1878106] [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] [Indexed: 10/22/2022]
Abstract
The triggering receptor expressed on myeloid cells 1 (TREM-1) is an innate immunity receptor associated with the amplification of inflammation in sterile and non-sterile inflammatory disorders. Since its first description, the two isoforms of the receptor, membrane and soluble (mTREM-1 and sTREM-1, respectively) have been largely explored in the immunopathogenesis of several bacterial diseases and sepsis. The role of the receptor in these scenarios seems to be at least partly dependent on the source/type of bacteria, host and context. As uncontrolled inflammation is a result of several bacterial infections, the inhibition of the receptor has been considered as a promising approach to treat such conditions. Further, sTREM-1 has been explored as a biomarker for diagnosis and/or prognosis of several bacterial diseases. Therefore, this review aims to provide an updated insight into how the receptor influences and is influenced by bacterial infections, highlighting the advances regarding the use/manipulation of TREM-1 isoforms in biomedical research and clinical practice.
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Affiliation(s)
| | | | - Marcelle Silva-Sales
- Institute of Tropical Pathology and Public Health, Federal University of Goiás, Goiânia, Brazil
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Doughty C, O'Driscoll DN, Smith S, O'Currain E, Grant T, O'Hare FM, Culliton M, Watson RWG, O'Neill A, Molloy EJ. Soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in neonatal sepsis. J Matern Fetal Neonatal Med 2020; 35:2485-2492. [PMID: 32674630 DOI: 10.1080/14767058.2020.1786520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND Efficient and accurate diagnosis of neonatal sepsis is challenging. The potential impact for a reduction in morbidity and mortality as well as antibiotic usage has stimulated the ongoing search for biomarkers of early sepsis. The objective of this pilot study was to quantify the levels of sTREM-1 and correlate with blood cultures and inflammatory markers in neonates evaluated for sepsis. METHODS Neonates with suspected sepsis were enrolled (n = 83; Preterm n = 35; Term n = 48). Routine bloods for sepsis evaluation were included and plasma sTREM-1 levels were quantified by ELISA. RESULTS Term and preterm neonates (n = 83; Preterm n = 35; Term n = 48) were enrolled and 16 neonates had positive blood cultures (preterm n = 15; term n = 1). sTREM-1 levels were not significantly different in infants with culture-positive or culture-negative sepsis (356 ± 218 pg/mL and 385 ± 254 pg/mL respectively). The immature-to-total granulocyte (I/T) ratio showed a significant positive correlation with sTREM-1 in the preterm group with positive blood cultures. Additionally, sTREM-1 showed a positive correlation with CRP in the preterm group with negative blood cultures. CONCLUSIONS sTREM-1 was associated with traditional markers of inflammation (I/T ratio and CRP). However, in this cohort sTREM-1 did not improve the early detection of neonatal culture-positive sepsis.
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Affiliation(s)
- Catherine Doughty
- Department of Biochemistry, National Maternity Hospital, Dublin, Ireland
| | - David N O'Driscoll
- Department of Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute; Trinity Research in Childhood Centre, Trinity College, Dublin, Ireland
| | - Sile Smith
- Department of Neonatology, National Maternity Hospital, Dublin, Ireland
| | - Eoin O'Currain
- Department of Neonatology, National Maternity Hospital, Dublin, Ireland
| | - Tim Grant
- Centre for Support and Training in Analysis and Research, University College Dublin, Dublin, Ireland
| | - Fiona M O'Hare
- Department of Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute; Trinity Research in Childhood Centre, Trinity College, Dublin, Ireland.,Department of Neonatology, National Maternity Hospital, Dublin, Ireland
| | - Marie Culliton
- Department of Biochemistry, National Maternity Hospital, Dublin, Ireland
| | - R William G Watson
- School of Medicine and Medical Sciences, Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Amanda O'Neill
- School of Medicine and Medical Sciences, Conway Institute of Biomolecular and Biomedical Science, University College Dublin, Dublin, Ireland
| | - Eleanor J Molloy
- Department of Paediatrics, Trinity College, The University of Dublin, Dublin, Ireland.,Trinity Translational Medicine Institute; Trinity Research in Childhood Centre, Trinity College, Dublin, Ireland.,Department of Neonatology, National Maternity Hospital, Dublin, Ireland.,Department of Neonatology, Coombe Women and Infants' University Hospital, Dublin, Ireland.,Department of Neonatology, Children's Health Ireland at Crumlin and Tallaght, Dublin, Ireland
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Loughland JR, Woodberry T, Field M, Andrew DW, SheelaNair A, Dooley NL, Piera KA, Amante FH, Kenangalem E, Price RN, Engwerda CR, Anstey NM, McCarthy JS, Boyle MJ, Minigo G. Transcriptional profiling and immunophenotyping show sustained activation of blood monocytes in subpatent Plasmodium falciparum infection. Clin Transl Immunology 2020; 9:e1144. [PMID: 32566226 PMCID: PMC7302943 DOI: 10.1002/cti2.1144] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/17/2020] [Accepted: 05/18/2020] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES Malaria, caused by Plasmodium infection, remains a major global health problem. Monocytes are integral to the immune response, yet their transcriptional and functional responses in primary Plasmodium falciparum infection and in clinical malaria are poorly understood. METHODS The transcriptional and functional profiles of monocytes were examined in controlled human malaria infection with P. falciparum blood stages and in children and adults with acute malaria. Monocyte gene expression and functional phenotypes were examined by RNA sequencing and flow cytometry at peak infection and compared to pre-infection or at convalescence in acute malaria. RESULTS In subpatent primary infection, the monocyte transcriptional profile was dominated by an interferon (IFN) molecular signature. Pathways enriched included type I IFN signalling, innate immune response and cytokine-mediated signalling. Monocytes increased TNF and IL-12 production upon in vitro toll-like receptor stimulation and increased IL-10 production upon in vitro parasite restimulation. Longitudinal phenotypic analyses revealed sustained significant changes in the composition of monocytes following infection, with increased CD14+CD16- and decreased CD14-CD16+ subsets. In acute malaria, monocyte CD64/FcγRI expression was significantly increased in children and adults, while HLA-DR remained stable. Although children and adults showed a similar pattern of differentially expressed genes, the number and magnitude of gene expression change were greater in children. CONCLUSIONS Monocyte activation during subpatent malaria is driven by an IFN molecular signature with robust activation of genes enriched in pathogen detection, phagocytosis, antimicrobial activity and antigen presentation. The greater magnitude of transcriptional changes in children with acute malaria suggests monocyte phenotypes may change with age or exposure.
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Affiliation(s)
- Jessica R Loughland
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Menzies School of Health ResearchDarwinNTAustralia
| | - Tonia Woodberry
- Menzies School of Health ResearchDarwinNTAustralia,Charles Darwin UniversityDarwinNTAustralia,Present address:
The University of NewcastleCallaghanNSWAustralia
| | - Matt Field
- Australian Institute of Tropical Health and Medicine and Centre for Tropical Bioinformatics and Molecular BiologyJames Cook UniversityCairnsQLDAustralia,John Curtin School of Medical ResearchAustralian National UniversityCanberraACTAustralia
| | - Dean W Andrew
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Arya SheelaNair
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | | | - Kim A Piera
- Menzies School of Health ResearchDarwinNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | - Fiona H Amante
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia
| | - Enny Kenangalem
- Timika Malaria Research ProgramPapuan Health and Community Development FoundationTimikaIndonesia,District Health AuthorityTimikaIndonesia
| | - Ric N Price
- Menzies School of Health ResearchDarwinNTAustralia,Charles Darwin UniversityDarwinNTAustralia,Centre for Tropical Medicine and Global HealthNuffield Department of Clinical MedicineUniversity of OxfordOxfordUK,Mahidol‐Oxford Tropical Medicine Research UnitFaculty of Tropical MedicineMahidol UniversityBangkokThailand
| | | | - Nicholas M Anstey
- Menzies School of Health ResearchDarwinNTAustralia,Charles Darwin UniversityDarwinNTAustralia
| | | | - Michelle J Boyle
- QIMR Berghofer Medical Research InstituteBrisbaneQLDAustralia,Menzies School of Health ResearchDarwinNTAustralia
| | - Gabriela Minigo
- Menzies School of Health ResearchDarwinNTAustralia,Charles Darwin UniversityDarwinNTAustralia,College of Health and Human SciencesCharles Darwin UniversityDarwinNTAustralia
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Dynamic Monitoring of sTREM-1 and Other Biomarkers in Acute Cholangitis. Mediators Inflamm 2020; 2020:8203813. [PMID: 32508526 PMCID: PMC7245684 DOI: 10.1155/2020/8203813] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/23/2020] [Accepted: 04/09/2020] [Indexed: 12/24/2022] Open
Abstract
Background Sepsis is a common complication of acute cholangitis (AC), which is associated with a high mortality rate. Our study is aimed at exploring the significance of white blood cell (WBC), C-reactive protein (CRP), procalcitonin (PCT), soluble triggering receptor expressed on myeloid cells 1 (sTREM-1), and temperature (T) alone or combined together in early identification and curative effect monitoring of AC with or without sepsis. Methods 65 consecutive cases with AC and 76 control cases were enrolled. They were divided into three groups: Group A (AC with sepsis), Group B (AC without sepsis), and Group C (inpatients without AC or other infections). The levels of WBC, CRP, PCT, sTREM-1, and temperature were measured dynamically. The study was carried out and reported according to STARD 2015 reporting guidelines. Results CRP had the highest AUC to identify AC from individuals without AC or other infections (AUC 1.000, sensitivity 100.0%, specificity 100.0%, positive predictive value 100.0%, and negative predictive value 100.0%). Among various single indexes, PCT performed best (AUC 0.785, sensitivity 75.8%, specificity 72.2%, positive predictive value 68.7%, and negative predictive value 78.8%) to distinguish sepsis with AC, while different combinations of indexes did not perform better. From day 1 to day 5 of hospitalization, the levels of sTREM-1 in Group A were the highest, followed by Groups B and C (P < 0.05); on day 8, sTREM-1 levels in Groups A and B declined back to normal. However, other index levels among three groups still had a significant difference on day 10. Both in Groups A and B, sTREM-1 levels declined fast between day 1 and day 2 (P < 0.05). Conclusions CRP is the best biomarker to suggest infection here. PCT alone is sufficient enough to diagnose sepsis with AC. sTREM-1 is the best biomarker to monitor patients' response to antimicrobial therapy and biliary drainage.
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Gao S, Yi Y, Xia G, Yu C, Ye C, Tu F, Shen L, Wang W, Hua C. The characteristics and pivotal roles of triggering receptor expressed on myeloid cells-1 in autoimmune diseases. Autoimmun Rev 2018; 18:25-35. [PMID: 30408584 DOI: 10.1016/j.autrev.2018.07.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 07/09/2018] [Indexed: 01/13/2023]
Abstract
Triggering receptor expressed on myeloid cells-1 (TREM-1) engagement can directly trigger inflammation or amplify an inflammatory response by synergizing with TLRs or NLRs. Autoimmune diseases are a family of chronic systemic inflammatory disorders. The pivotal role of TREM-1 in inflammation makes it important to explore its immunological effects in autoimmune diseases. In this review, we summarize the structural and functional characteristics of TREM-1. Particularly, we discuss recent findings on TREM-1 pathway regulation in various autoimmune diseases, including rheumatoid arthritis (RA), systemic lupus erythematosus (SLE), inflammatory bowel disease (IBD), type 1 diabetes (T1D), and psoriasis. This receptor may potentially be manipulated to alter the inflammatory response to chronic inflammation and possible therapies are explored in this review.
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Affiliation(s)
- Sheng Gao
- Laboratory Animal Center, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, China
| | - Yongdong Yi
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Guojun Xia
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Chengyang Yu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Chenmin Ye
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Fuyang Tu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Leibin Shen
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China
| | - Wenqian Wang
- Department of Breast Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, Zhejiang Province, China.
| | - Chunyan Hua
- School of Basic Medical Sciences, Wenzhou Medical University, Wenzhou 325035, Zhejiang Province, China.
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Vázquez-Otero I, Rodríguez-Navedo Y, Vilá-Rivera K, Nieves-Plaza M, Morales-Ortiz J, Washington AV, Vilá LM. Association of soluble TREM-like transcript-1 with clinical features and patient reported outcomes in systemic lupus erythematosus. Eur J Rheumatol 2018; 5:244-248. [PMID: 30308137 PMCID: PMC6267757 DOI: 10.5152/eurjrheum.2018.18074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/27/2018] [Indexed: 01/04/2023] Open
Abstract
OBJECTIVE The soluble triggering receptor expressed on myeloid cells (TREM-1)-like transcript 1 (sTLT-1) has a modulatory effect on the activation of TREM-1. We compared plasma sTLT-1 levels between patients with systemic lupus erythematosus (SLE) and healthy individuals and determined the association between sTLT-1 levels and clinical features and patient-reported outcomes (PROs) among patients with lupus. METHODS An unmatched case-control study was conducted in 46 patients with SLE and 28 healthy subjects. sTLT-1 plasma levels were determined using enzyme-linked immunosorbent assay. Demographic factors, SLE manifestations, comorbidities, pharmacologic profile, disease activity (per SLAM-R), damage accrual, and PROs (as per Lupus Patient-Reported Outcome [LupusPRO]) were studied. RESULTS Patients with SLE were found to have lower sTLT-1 levels compared with healthy individuals (9.0±7.2 vs. 18.6±22.3 pg/mL, p=0.008). Among patients with SLE, higher sTLT-1 levels were found in those taking corticosteroids (11.1±8.8 vs. 6.9±4.6 pg/mL, p=0.014). Significant correlations were found for the cognition (r=-0.442, p=0.027) and desires/goals (r=0.435, p=0.030) domains of LupusPRO. A tendency was observed between sTLT-1 levels and the SLAM-R (r=-0.278, p=0.064) and the lupus symptoms (r=-0.388, p=0.055) and physical health (r=-0.382, p=0.060) domains of LupusPRO. CONCLUSION Compared with healthy individuals, sTLT-1 levels were significantly lower in patients with SLE. Among patients with SLE, correlations were observed for some domains of LupusPRO. Given that sTLT-1 has anti-inflammatory properties, the deficiency of this protein could play an important role in the pathogenesis of SLE.
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Affiliation(s)
- Ileana Vázquez-Otero
- Division of Rheumatology, Department of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Yerania Rodríguez-Navedo
- Division of Rheumatology, Department of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Karina Vilá-Rivera
- Division of Rheumatology, Department of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Mariely Nieves-Plaza
- Division of Rheumatology, Department of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
| | - Jessica Morales-Ortiz
- Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico
| | - A Valance Washington
- Department of Biology, University of Puerto Rico, Río Piedras Campus, San Juan, Puerto Rico
| | - Luis M Vilá
- Division of Rheumatology, Department of Medicine, University of Puerto Rico Medical Sciences Campus, San Juan, Puerto Rico
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Cui N, Wang H, Su LX, Zhang JH, Long Y, Liu DW. Role of Triggering Receptor Expressed on Myeloid Cell-1 Expression in Mammalian Target of Rapamycin Modulation of CD8 + T-cell Differentiation during the Immune Response to Invasive Pulmonary Aspergillosis. Chin Med J (Engl) 2018; 130:1211-1217. [PMID: 28485322 PMCID: PMC5443028 DOI: 10.4103/0366-6999.205850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: Triggering receptor expressed on myeloid cell-1 (TREM-1) may play a vital role in mammalian target of rapamycin (mTOR) modulation of CD8+ T-cell differentiation through the transcription factors T-box expressed in T-cells and eomesodermin during the immune response to invasive pulmonary aspergillosis (IPA). This study aimed to investigate whether the mTOR signaling pathway modulates the proliferation and differentiation of CD8+ T-cells during the immune response to IPA and the role TREM-1 plays in this process. Methods: Cyclophosphamide (CTX) was injected intraperitoneally, and Aspergillus fumigatus spore suspension was inoculated intranasally to establish the immunosuppressed IPA mouse model. After inoculation, rapamycin (2 mg·kg−1·d−1) or interleukin (IL)-12 (5 μg/kg every other day) was given for 7 days. The number of CD8+ effector memory T-cells (Tem), expression of interferon (IFN)-γ, mTOR, and ribosomal protein S6 kinase (S6K), and the levels of IL-6, IL-10, galactomannan (GM), and soluble TREM-1 (sTREM-1) were measured. Results: Viable A. fumigatus was cultured from the lung tissue of the inoculated mice. Histological examination indicated greater inflammation, hemorrhage, and lung tissue injury in both IPA and CTX + IPA mice groups. The expression of mTOR and S6K was significantly increased in the CTX + IPA + IL-12 group compared with the control, IPA (P = 0.01; P = 0.001), and CTX + IPA (P = 0.034; P = 0.032) groups, but significantly decreased in the CTX + IPA + RAPA group (P < 0.001). Compared with the CTX + IPA group, the proportion of Tem, expression of IFN-γ, and the level of sTREM-1 were significantly higher after IL-12 treatment (P = 0.024, P = 0.032, and P = 0.017, respectively), and the opposite results were observed when the mTOR pathway was blocked by rapamycin (P < 0.001). Compared with the CTX + IPA and CTX + IPA + RAPA groups, IL-12 treatment increased IL-6 and downregulated IL-10 as well as GM, which strengthened the immune response to the IPA infection. Conclusions: mTOR modulates CD8+ T-cell differentiation during the immune response to IPA. TREM-1 may play a vital role in signal transduction between mTOR and the downstream immune response.
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Affiliation(s)
- Na Cui
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Hao Wang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Long-Xiang Su
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jia-Hui Zhang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yun Long
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Da-Wei Liu
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
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Georgescu AM, Grigorescu BL, Chirteș IR, Vitin AA, Fodor RȘ. The Relevance of Coding Gene Polymorphysms of Cytokines and Cellular Receptors in Sepsis. ACTA ACUST UNITED AC 2017; 3:5-11. [PMID: 29967864 PMCID: PMC5769888 DOI: 10.1515/jccm-2017-0001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Accepted: 01/20/2017] [Indexed: 12/12/2022]
Abstract
Sepsis is an injurious systemic host response to infection, which can often lead to septic shock and death. Recently, the immune-pathogenesis and genomics of sepsis have become a research topic focusing on the establishment of diagnostic and prognostic biomarkers. As yet, none have been identified as having the necessary specificity to be used independently of other factors in this respect. However the accumulation of current evidence regarding genetic variations, especially the single nucleotide polymorphisms (SNPs) of cytokines and other innate immunity determinants, partially explains the susceptibility and individual differences of patients with regard to the evolution of sepsis. This article outlines the role of genetic variation of some serum proteins which have the potential to be used as biomarker values in evaluating sepsis susceptibility and the progression of the condition.
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Affiliation(s)
- Anca Meda Georgescu
- Infectious Diseases Clinic, University of Medicine and Pharmacy Tirgu Mures, Tirgu Mures, Romania
| | - Bianca Liana Grigorescu
- Discipline of Pathophysiology, University of Medicine and Pharmacy Tirgu Mures, Tirgu Mures, Romania
| | - Ioana Raluca Chirteș
- Infectious Diseases Clinic, University of Medicine and Pharmacy Tirgu Mures, Tirgu Mures, Romania
| | | | - Raluca Ștefania Fodor
- Anesthesiology and Intensive Care Clinic, University of Medicine and Pharmacy Tirgu Mures, Tirgu Mures, Romania
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Significance of soluble triggering receptor expressed on myeloid cells-1 elevation in patients admitted to the intensive care unit with sepsis. BMC Infect Dis 2016; 16:559. [PMID: 27729010 PMCID: PMC5059941 DOI: 10.1186/s12879-016-1893-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 10/01/2016] [Indexed: 01/18/2023] Open
Abstract
Background Among septic patients admitted to the intensive care unit (ICU), early recognition of those with the highest risk of death is of paramount importance. Since clinical judgment is sometimes uncertain biomarkers could provide additional information likely to guide critical illness management. We evaluated the prognostic value of soluble Triggering Receptor Expressed by Myeloid cells 1 (sTREM-1), procalcitonin (PCT) and leucocyte surface expression of CD64. Methods This was a prospective cohort study, which included 190 septic patient admitted to the ICU in two hospitals. Blood samples for biomarker measurements were obtained upon admission and thereafter. The Simplified Acute Physiology Score (SAPS) II and the Sequential Organ Failure Assessment (SOFA) score were calculated. The primary outcome was all-cause death in the ICU. Results The mortality rate reached 25.8 %. The best predictive value of the three biomarkers was obtained with baseline sTREM-1, although clinical scores outperformed this. Accuracy was greater in patients without prior exposure to antibiotics and in those with proven bacterial infection. Adding sTREM-1 levels to SAPS II increased its specificity to 98 %. The soluble TREM-1 level, core temperature and SAPS II value were the only independent predictors of death after adjustment for potential confounders. A decrease in sTREM-1 with time was also more pronounced in survivors than in non-survivors. Conclusions sTREM-1 was found to be the best prognostic biomarker among those tested. Both baseline values and variations with time seemed relevant. Although SAPS II outperformed sTREM-1 regarding the prediction of ICU survival, the biomarker could provide additional information. Electronic supplementary material The online version of this article (doi:10.1186/s12879-016-1893-4) contains supplementary material, which is available to authorized users.
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13
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Dopheide JF, Rubrech J, Trumpp A, Geissler P, Zeller GC, Bock K, Dünschede F, Trinh TT, Dorweiler B, Münzel T, Radsak MP, Espinola-Klein C. Leukocyte-platelet aggregates-a phenotypic characterization of different stages of peripheral arterial disease. Platelets 2016; 27:658-667. [PMID: 27352829 DOI: 10.3109/09537104.2016.1153619] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The formation of monocyte-platelet aggregates and neutrophil-platelet aggregates (MPA and NPA, respectively) is influenced by inflammation, but also might contribute to an exacerbation of inflammatory responses in atherosclerotic plaque. The purpose of this study was to analyze MPA and NPA proportions in regard to different stages of peripheral arterial disease (PAD). Forty-five patients with intermittent claudication (IC) (3 groups: Rutherford (R)-1, R-2, and R-3; each n = 15), 20 patients with critical limb ischemia (CLI) (Rutherford 5 (40%) and 6 (60%)), and 20 healthy controls were studied. Analyses of monocyte (Mon) subpopulations (CD14++CD16- (classical) Mon1, CD14++CD16+ (intermediate) Mon2, CD14+CD16++ (non-classical) Mon3), MPA, and NPA was performed from whole blood by flow cytometry. Controls showed an increased proportion of the Mon1 subpopulation (p < 0.001), whereas CLI patients showed a significant increase of the Mon2 subpopulation compared to controls, R-1, or R-2 patients (p < 0.0001). For the Mon3 subpopulation, CLI and R-3 patients showed an increased proportion (p < 0.05). MPA formation with the proinflammatory Mon2 and Mon3 subpopulations was increased in CLI patients (both p < 0.01). Similarly, NPA was significantly increased in CLI patients (p < 0.05). Serological markers of inflammation and procoagulation (fibrinogen [r = 0.459, p < 0.001], soluble triggering receptor expressed on myeloid cells (sTREM-1) [r = 0.237, p < 0.05] and P-Selectin [r = 0.225, p < 0.05]) correlated directly with MPA formation on the Mon2 subpopulation. We found an association of inflammatory and procoagulatory markers with increased formation of MPA on the Mon2 subpopulation. Since R-3 patients also had significantly increased MPA, one can speculate that the inflammatory burden might promote an aggravation of the disease.
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Affiliation(s)
- Jörn F Dopheide
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Jennifer Rubrech
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Amelie Trumpp
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Philip Geissler
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Geraldine C Zeller
- b Department of Internal Medicine I , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Karsten Bock
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Friedrich Dünschede
- c Department of Cardiothoracic and Vascular Surgery, Division of Vascular Surgery , University Medical Center, Johannes-Gutenberg University , Mainz , Germany
| | - Tran Tong Trinh
- c Department of Cardiothoracic and Vascular Surgery, Division of Vascular Surgery , University Medical Center, Johannes-Gutenberg University , Mainz , Germany
| | - Bernhard Dorweiler
- c Department of Cardiothoracic and Vascular Surgery, Division of Vascular Surgery , University Medical Center, Johannes-Gutenberg University , Mainz , Germany
| | - Thomas Münzel
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
| | - Markus P Radsak
- d Department of Internal Medicine III , University Medical Center, Johannes Gutenberg-University , Mainz , Germany.,e Institute for Immunology, University Medical Center, Johannes Gutenberg University , Mainz , Germany
| | - Christine Espinola-Klein
- a Department of Internal Medicine II , University Medical Center, Johannes Gutenberg-University , Mainz , Germany
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Saldir M, Tunc T, Cekmez F, Cetinkaya M, Kalayci T, Fidanci K, Babacan O, Erdem G, Kocak N, Sari E, Akgul EO, Kul M. Endocan and Soluble Triggering Receptor Expressed on Myeloid Cells-1 as Novel Markers for Neonatal Sepsis. Pediatr Neonatol 2015; 56:415-21. [PMID: 26341458 DOI: 10.1016/j.pedneo.2015.03.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 02/12/2015] [Accepted: 03/17/2015] [Indexed: 10/23/2022] Open
Abstract
BACKGROUND Neonatal sepsis is an important cause of neonatal morbidity and mortality in the neonatal intensive care unit. Soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) has been evaluated in sepsis and septic shock, and it was found to be valuable in distinguishing septic cases from nonseptic cases. Endocan is constitutively expressed by endothelial cells, and high levels of endocan may be of relevance for the promotion of systemic inflammation. The aim of this study was to investigate whether the levels of sTREM-1 and endocan were increased in late-onset neonatal sepsis. METHODS Patients were classified into septic and nonseptic groups. Blood was collected from a peripheral vein of all septic newborns and healthy newborns at the time of initial laboratory evaluation before any treatment, and within 48-72 hours after initiation of treatment. Serum sTREM-1 and endocan measurements were performed when the study was finished. RESULTS The study population comprised of 50 neonates: 20 nonseptic neonates and 30 septic neonates. The groups were similar with regards to baseline characteristics. The initial measurements of interleukin-6 (IL-6), sTREM-1, endocan, and immature/total neutrophil ratio (I/T ratio) were significantly higher in septic neonates in comparison with nonseptic neonates. Receiver operating characteristic (ROC) curve analyses revealed that IL-6, sTREM-1, endocan, and I/T ratio resulted in significant areas under the curve (AUC) with respect to early identification of septic neonates. Soluble TREM-1 and IL-6 performed best to distinguish septic neonates from nonseptic neonates. Univariate logistic regression analysis showed that increased IL-6 and sTREM-1 were strong predictors of neonatal late-onset sepsis. CONCLUSION Serum sTREM-1, IL-6, endocan levels, and I/T ratio increased in septic neonates. However, the diagnostic accuracy of circulating sTREM-1 seemed to be better than endocan and I/T ratio, but lower than IL-6.
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Affiliation(s)
- Mehmet Saldir
- Department of Pediatrics, Gulhane Military School of Medicine, Ankara, Turkey
| | - Turan Tunc
- Department of Pediatrics, Division of Neonatology, Gulhane Military School of Medicine, Ankara, Turkey.
| | - Ferhat Cekmez
- Department of Pediatrics, Division of Neonatology, Gulhane Military School of Medicine, Ankara, Turkey
| | - Merih Cetinkaya
- Department of Pediatrics, Division of Neonatology, Istanbul Kanuni Sultan Suleyman Teaching Hospital, Istanbul, Turkey
| | - Tugce Kalayci
- Department of Pediatrics, Division of Neonatology, Istanbul Kanuni Sultan Suleyman Teaching Hospital, Istanbul, Turkey
| | - Kursat Fidanci
- Department of Pediatrics, Gulhane Military School of Medicine, Ankara, Turkey
| | - Oguzhan Babacan
- Department of Pediatrics, Gulhane Military School of Medicine, Ankara, Turkey
| | - Galip Erdem
- Department of Pediatrics, Gulhane Military School of Medicine, Ankara, Turkey
| | - Necmettin Kocak
- Department of Public Health, Gulhane Military School of Medicine, Ankara, Turkey
| | - Erkan Sari
- Department of Pediatrics, Gulhane Military School of Medicine, Ankara, Turkey
| | - Emin Ozgur Akgul
- Department of Clinical Biochemistry, Gulhane Military School of Medicine, Ankara, Turkey
| | - Mustafa Kul
- Department of Pediatrics, Gulhane Haydarpasa Military Hospital, Istanbul, Turkey
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15
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Immune responses in relation to the type and time of thermal injury: an experimental study. Injury 2015; 46:227-32. [PMID: 25467712 DOI: 10.1016/j.injury.2014.10.057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 10/11/2014] [Accepted: 10/19/2014] [Indexed: 02/02/2023]
Abstract
BACKGROUND Thermal injuries are followed by a complex immune response, but the relationship between the severity of burn injury and the time exposure to the thermal injury on the extent of the immune response is still not known. OBJECTIVE This study focuses on characterising the effect of temperature and time exposure on the post-burn immune response. METHODS We used 120 C57BL/6 male mice divided equally in 5 burn groups and one sham operated group (groups A-E and sham). Ten mice per group were sacrificed at 24 and 48 h after burn injury and whole blood was collected; specimens of liver, lung, spleen, kidney and bowel were excised. Apoptosis and TREM-1 expression on circulating blood cells were measured. Splenocytes were isolated and stimulated for cytokine production; the rate of apoptosis of splenocytes was also measured. RESULTS Production of IL-17 from splenocytes of mice group D was enhanced. Considerable effects were shown on the apoptosis of circulating lymphocytes and of spleen cells. The apoptotic rates varied between groups and also evolved after 24 and 48 h. To examine the origin of this differential response, quantitative bacterial cultures of liver, lung and kidney were made but no differences were observed compared with sham-operated animals. LIMITATIONS This study was based on an experimental murine model. CONCLUSION There is a unique response for each type of injury depending on the temperature of the thermal source and the exposure time.
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Early changes of the kinetics of monocyte trem-1 reflect final outcome in human sepsis. BMC Immunol 2014; 15:585. [PMID: 25532536 PMCID: PMC4335537 DOI: 10.1186/s12865-014-0063-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 12/15/2014] [Indexed: 11/23/2022] Open
Abstract
Background TREM-1 (triggering receptor expressed on myeloid cells), a receptor expressed on neutrophils and monocytes, is upregulated in sepsis and seems to tune the inflammatory response. We explored the expression of TREM-1 at the gene level and on cell membranes of monocytes and association with clinical outcome. Methods Peripheral venous blood was sampled from 75 septic patients (39 patients with sepsis, 25 with severe sepsis and 11 with septic shock) on sepsis days 1, 3 and 7. TREM-1 on monocytes was measured by flow cytometry; gene expression of TREM-1 in circulating mononuclear cells was assessed by real-time PCR. sTREM-1 was measured in serum by an enzyme immunoassay. Results Although surface TREM-1, sTREM-1 and TREM-1 gene expression did not differ between sepsis, severe sepsis and septic shock on day 1, survivors had greater expression of surface TREM-1 on days 3 and 7 compared to non-survivors. sTREM-1 on non-survivors decreased on day 3 compared to baseline. Patients with increase of monocyte gene expression of TREM-1 from day 1 to day 3 had prolonged survival compared to patients with decrease of gene expression of TREM-1 from day 1 to day 3 (p: 0.031). Conclusions Early decrease of gene expression of TREM-1 in monocytes is associated with poor outcome. A reciprocal decrease of the pro-inflammatory surface receptor TREM-1 linked with sepsis-induced immunosuppression may be part of the explanation. Electronic supplementary material The online version of this article (doi:10.1186/s12865-014-0063-y) contains supplementary material, which is available to authorized users.
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Pelham CJ, Pandya AN, Agrawal DK. Triggering receptor expressed on myeloid cells receptor family modulators: a patent review. Expert Opin Ther Pat 2014; 24:1383-95. [PMID: 25363248 DOI: 10.1517/13543776.2014.977865] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
INTRODUCTION Triggering receptor expressed on myeloid cells (TREM) receptors and TREM-like transcript (TLT; or TREML) receptors of the immunoglobulin superfamily are known as key modulators of host immune responses. TREM-1 (CD354) and TREM-2 share the transmembrane adaptor DNAX-activation protein of 12 kDa (DAP12), but they possess separate stimulatory and inhibitory functional roles, especially in myeloid cells. AREAS COVERED This review covers findings related to TREMs and TLTs published in patent applications from their discovery in 2000 to the present. New roles for TREM-1, TREM-2, TLT-1 and TLT-2 in maladies ranging from acute and chronic inflammatory disorders to cardiovascular diseases and cancers are discussed. Putative endogenous ligands and novel synthetic peptide blockers are also discussed. EXPERT OPINION So far, therapeutic use of activators/blockers specific for TREMs and TLTs has been limited to preclinical animal models. TREM-1 is an immediate therapeutic target for acute and chronic inflammatory conditions, especially sepsis. Certain mutations in DAP12 and TREM-2 manifest into a disorder named polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy, and newly identified TREM-2 variants confer a significant increase in risk of developing Alzheimer's disease. This makes TREM-2 an attractive therapeutic target for neurodegenerative diseases.
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Affiliation(s)
- Christopher J Pelham
- Creighton University School of Medicine, Department of Biomedical Sciences and Center for Clinical & Translational Science , Omaha, NE 68178 , USA
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Pelham CJ, Agrawal DK. Emerging roles for triggering receptor expressed on myeloid cells receptor family signaling in inflammatory diseases. Expert Rev Clin Immunol 2013; 10:243-56. [PMID: 24325404 DOI: 10.1586/1744666x.2014.866519] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Innate immune receptors represent important therapeutic targets for inflammatory disorders. In particular, the Toll-like receptor (TLR) family has emerged as a promoter of chronic inflammation that contributes to obesity, insulin resistance and atherosclerosis. Importantly, triggering receptor expressed on myeloid cells-1 (TREM-1) has been characterized as an 'amplifier' of TLR2 and TLR4 signaling. TREM-1- and TREM-2-dependent signaling, as opposed to TREM-like transcript-1 (TLT-1 or TREML1), are mediated through association with the transmembrane adaptor DNAX activation protein of 12 kDa (DAP12). Recessive inheritance of rare mutations in DAP12 or TREM-2 results in a disorder called polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy, and surprisingly these subjects are not immunocompromised. Recent progress into the roles of TREM/DAP12 signaling is critically reviewed here with a focus on metabolic, cardiovascular and inflammatory diseases. The expanding repertoire of putative ligands for TREM receptors is also discussed.
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Affiliation(s)
- Christopher J Pelham
- Department of Biomedical Sciences and Center for Clinical & Translational Science, Creighton University School of Medicine, 2500 California Plaza, Omaha, NE 68178, USA
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Mihailidou I, Pelekanou A, Pistiki A, Spyridaki A, Tzepi IM, Damoraki G, Giamarellos-Bourboulis EJ. Dexamethasone Down-Regulates Expression of Triggering Receptor Expressed on Myeloid Cells-1: Evidence for a TNFα-Related Effect. Front Public Health 2013; 1:50. [PMID: 24350219 PMCID: PMC3859977 DOI: 10.3389/fpubh.2013.00050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Accepted: 04/24/2013] [Indexed: 11/20/2022] Open
Abstract
Objectives: To investigate the effect of dexamethasone on triggering receptor expressed on myeloid cells-1 (TREM-1). Methods: Wild-type and tumor necrosis factor (TNF−/−) mice were pre-treated with saline, dexamethasone, or hydrocortisone and exposed to a lethal infection of Pseudomonas aeruginosa. Mortality and TREM-1 on neutrophil membranes was measured after sacrifice. U937 human monocytic cells were stimulated with lipopolysaccharide (LPS) or heat-killed P. aeruginosa without or with dexamethasone or hydrocortisone, and cell-surface TREM-1 and soluble TREM-1 (sTREM-1) were quantified. Expression of TREM-1 and sTREM-1 was also studied in LPS-stimulated U937 cells incubated in the absence or presence of TNFα or anti-TNFα antibody. Results: Pre-treatment with dexamethasone, but not hydrocortisone, prolonged animal survival. Mice pre-treated with dexamethasone showed decreased expression of TREM-1 on neutrophils. In U937 cells, LPS or heat-killed P. aeruginosa induced the expression of TREM-1 and the release of sTREM-1. U937 TREM-1 and sTREM-1 were decreased upon addition of dexamethasone but not hydrocortisone. The suppressive effect of dexamethasone was enhanced in the presence of exogenous TNFα and lost in the presence of anti-TNFα antibody. In TNF−/− mice, dexamethasone suppression of mortality and TREM-1 neutrophil expression was lost. Gene expression of TREM-1 in U937 monocytes was decreased after treatment with dexamethasone. Conclusion: TREM-1/sTREM-1 is a novel site of action of dexamethasone. This action is associated with down-regulation of gene expression and is mediated by TNFα.
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Affiliation(s)
- Ira Mihailidou
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Aimilia Pelekanou
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Aikaterini Pistiki
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Aikaterini Spyridaki
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Ira-Maria Tzepi
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Georgia Damoraki
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece
| | - Evangelos J Giamarellos-Bourboulis
- 4th Department of Internal Medicine, University of Athens Medical School , Athens , Greece ; Integrated Research and Treatment Center, Center for Sepsis Control and Care, Jena University Hospital , Jena , Germany
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Association of serum myeloid cells of soluble triggering receptor-1 level with myocardial dysfunction in patients with severe sepsis. Mediators Inflamm 2013; 2013:819246. [PMID: 23861562 PMCID: PMC3703897 DOI: 10.1155/2013/819246] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 06/02/2013] [Accepted: 06/02/2013] [Indexed: 01/20/2023] Open
Abstract
OBJECTIVE To investigate the association of serum sTREM-1 with myocardial dysfunction in patients with severe sepsis. METHODS A total of 85 patients with severe sepsis were divided into severe sepsis group (n = 40) and septic shock group (n = 45). Serum levels of sTREM-1, NT-proBNP, APACHE II score, SOFA score, cardiac index, cardiac function index, global ejection fraction, and left ventricular contractility index were measured on days 1, 3, and 7 after admission to ICU. RESULTS Serum sTREM-1 levels of patients with septic shock were significantly higher than those with severe sepsis on days 1, 3, and 7. Serum sTREM-1 was positively correlated with APACHE II scores, SOFA scores, and NT-proBNP. However, The sTREM-1 level was markedly negatively correlated with CI, CFI, GEF, and dP/dt max, respectively. Multiple logistic regression analysis showed that sTREM-1 was independent risk factor to NT-proBNP increasing. The optimal cut-off point of sTREM-1 for detecting patients with myocardial dysfunction was 468.05 ng/mL with sensitivity (80.6%) and specificity (75.7%). There is no difference in TREM-1-mRNA expression between the two groups. CONCLUSIONS Serum sTREM-1 is significantly associated with myocardial dysfunction and may be a valuable tool for determining the presence of myocardial dysfunction in patients with severe sepsis.
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Clinical significance of soluble-triggering receptor expressed on myeloid cells-1 (sTREM-1) in patients with rheumatoid arthritis. EGYPTIAN RHEUMATOLOGIST 2013. [DOI: 10.1016/j.ejr.2012.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Aziz M, Jacob A, Yang WL, Matsuda A, Wang P. Current trends in inflammatory and immunomodulatory mediators in sepsis. J Leukoc Biol 2013; 93:329-42. [PMID: 23136259 PMCID: PMC3579020 DOI: 10.1189/jlb.0912437] [Citation(s) in RCA: 217] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2012] [Revised: 10/09/2012] [Accepted: 10/16/2012] [Indexed: 12/22/2022] Open
Abstract
Sepsis refers to severe systemic inflammation in response to invading pathogens. An overwhelming immune response, as mediated by the release of various inflammatory mediators, can lead to shock, multiple organ damage, and even death. Cytokines, proteases, lipid mediators, gaseous substances, vasoactive peptides, and cell stress markers play key roles in sepsis pathophysiology. Various adhesion molecules and chemokines sequester and activate neutrophils into the target organs, further augmenting inflammation and tissue damage. Although the anti-inflammatory substances counterbalance proinflammatory mediators, prolonged immune modulation may cause host susceptibility to concurrent infections, thus reflecting enormous challenge toward developing effective clinical therapy against sepsis. To understand the complex interplay between pro- and anti-inflammatory phenomenon in sepsis, there is still an unmet need to study newly characterized mediators. In addition, revealing the current trends of novel mediators will upgrade our understanding on their signal transduction, cross-talk, and synergistic and immunomodulating roles during sepsis. This review highlights the latest discoveries of the mediators in sepsis linking to innate and adaptive immune systems, which may lead to resolution of many unexplored queries.
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Affiliation(s)
- Monowar Aziz
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, and Department of Surgery, Hofstra North Shore-LIJ School of Medicine, Manhasset, New York, USA
| | - Asha Jacob
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, and Department of Surgery, Hofstra North Shore-LIJ School of Medicine, Manhasset, New York, USA
| | - Weng-Lang Yang
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, and Department of Surgery, Hofstra North Shore-LIJ School of Medicine, Manhasset, New York, USA
| | - Akihisa Matsuda
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, and Department of Surgery, Hofstra North Shore-LIJ School of Medicine, Manhasset, New York, USA
| | - Ping Wang
- Center for Immunology and Inflammation, The Feinstein Institute for Medical Research, and Department of Surgery, Hofstra North Shore-LIJ School of Medicine, Manhasset, New York, USA
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23
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Bisson C, Massin F, Lefevre PA, Thilly N, Miller N, Gibot S. Increased gingival crevicular fluid levels of soluble triggering receptor expressed on myeloid cells (sTREM) -1 in severe periodontitis. J Clin Periodontol 2012; 39:1141-8. [PMID: 23067264 DOI: 10.1111/jcpe.12008] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2012] [Indexed: 01/22/2023]
Abstract
AIM This study was designed to evaluate the presence of a new regulator of innate immunity in periodontitis: the soluble form of triggering receptor on myeloid cells-1 (sTREM-1) in gingival crevicular fluid (GCF). MATERIAL AND METHODS GCF was collected at four sites, three pathological and one healthy from 17 patients with periodontitis, and at one healthy site from 23 control patients. An enzyme-linked immunosorbent assay (ELISA) kit was used to quantify sTREM-1 levels in collected crevicular fluid. Recorded clinical parameters were probing pocket depth (PPD), bleeding upon probing, tooth mobility, plaque index (PlI), and gingival index (GI). RESULTS The mean sTREM-1 level in collected fluid was significantly higher in pathological sites than in healthy sites from either periodontal or control patients: 353.9 pg/ml, 50.2 pg/ml and 25.4 pg/ml respectively. Soluble TREM-1 concentration was significantly correlated with PPD. The sTREM-1 levels increased with the augmentation of the PlI and GI scores and levelled off at score 2 for both indexes. In multivariate analysis, periodontal pocket depth and smoking status were statistically associated with highest sTREM-1 concentrations. CONCLUSION sTREM-1 was detected in crevicular fluid and its concentration was higher in pathological sites. It could be a marker of periodontal tissue destruction.
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Affiliation(s)
- Catherine Bisson
- Département de parodontologie, Université Henri Poincaré, Nancy, France.
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24
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Tzepi IM, Giamarellos-Bourboulis EJ, Carrer DP, Tsaganos T, Claus RA, Vaki I, Pelekanou A, Kotsaki A, Tziortzioti V, Topouzis S, Bauer M, Papapetropoulos A. Angiopoietin-2 enhances survival in experimental sepsis induced by multidrug-resistant Pseudomonas aeruginosa. J Pharmacol Exp Ther 2012; 343:278-87. [PMID: 22859861 DOI: 10.1124/jpet.112.195180] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Levels of circulating angiopoietin-2 (Ang-2) increase in sepsis, raising the possibility that Ang-2 acts as a modulator in the sepsis cascade. To investigate this, experimental sepsis was induced in male C57BL6 mice by a multidrug-resistant isolate of Pseudomonas aeruginosa; survival was determined along with neutrophil tissue infiltration and release of proinflammatory cytokines. Survival was significantly increased either by pretreatment with recombinant Ang-2 2 h before or treatment with recombinant Ang-2 30 min after bacterial challenge. Likewise, Ang-2 pretreatment protected against sepsis-related death elicited by Escherichia coli; however, Ang-2 failed to provide protection in lipopolysaccharide (LPS)-challenged mice. The survival advantage of Ang-2 in response to P. aeruginosa challenge was lost in tumor necrosis factor (TNF)-deficient mice or neutropenic mice. Infiltration of the liver by neutrophils was elevated in the Ang-2 group compared with saline-treated animals. Serum TNF-α levels were reduced by Ang-2, whereas those of interleukin (IL)-6 and IL-10 remained unchanged. This was accompanied by lower release of TNF-α by stimulated splenocytes. When applied to U937 cells in vitro, heat-killed P. aeruginosa induced the secretion of IL-6 and TNF-α; low levels of exogenous TNF-α synergized with P. aeruginosa. This synergistic effect was abolished after the addition of Ang-2. These results put in evidence a striking protective role of Ang-2 in experimental sepsis evoked by a multidrug-resistant isolate of P. aeruginosa attributed to modulation of TNF-α production and changes in neutrophil migration. The protective role of Ang-2 is shown when whole microorganisms are used and not LPS, suggesting complex interactions with the host immune response.
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Affiliation(s)
- Ira-Maria Tzepi
- Fourth Department of Internal Medicine, University of Athens Medical School, Attikon University Hospital, 1 Rimini Str, 124 62 Athens, Greece
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