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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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Raggi F, Bosco MC. Targeting Mononuclear Phagocyte Receptors in Cancer Immunotherapy: New Perspectives of the Triggering Receptor Expressed on Myeloid Cells (TREM-1). Cancers (Basel) 2020; 12:cancers12051337. [PMID: 32456204 PMCID: PMC7281211 DOI: 10.3390/cancers12051337] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/18/2020] [Accepted: 05/22/2020] [Indexed: 12/14/2022] Open
Abstract
Inflammatory cells are major players in the onset of cancer. The degree of inflammation and type of inflammatory cells in the tumor microenvironment (TME) are responsible for tilting the balance between tumor progression and regression. Cancer-related inflammation has also been shown to influence the efficacy of conventional therapy. Mononuclear phagocytes (MPs) represent a major component of the inflammatory circuit that promotes tumor progression. Despite their potential to activate immunosurveillance and exert anti-tumor responses, MPs are subverted by the tumor to support its growth, immune evasion, and spread. MP responses in the TME are dictated by a network of stimuli integrated through the cross-talk between activatory and inhibitory receptors. Alterations in receptor expression/signaling can create excessive inflammation and, when chronic, promote tumorigenesis. Research advances have led to the development of new therapeutic strategies aimed at receptor targeting to induce a tumor-infiltrating MP switch from a cancer-supportive toward an anti-tumor phenotype, demonstrating efficacy in different human cancers. This review provides an overview of the role of MP receptors in inflammation-mediated carcinogenesis and discusses the most recent updates regarding their targeting for immunotherapeutic purposes. We focus in particular on the TREM-1 receptor, a major amplifier of MP inflammatory responses, highlighting its relevance in the development and progression of several types of inflammation-associated malignancies and the promises of its inhibition for cancer immunotherapy.
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Nylund KM, Ruokonen H, Sorsa T, Heikkinen AM, Meurman JH, Ortiz F, Tervahartiala T, Furuholm J, Bostanci N. Association of the salivary triggering receptor expressed on myeloid cells/its ligand peptidoglycan recognition protein 1 axis with oral inflammation in kidney disease. J Periodontol 2019; 89:117-129. [PMID: 28846062 DOI: 10.1902/jop.2017.170218] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Accepted: 08/16/2017] [Indexed: 01/01/2023]
Abstract
BACKGROUND Triggering receptor expressed on myeloid cells (TREM-1) is a cell-surface receptor involved in amplification of inflammatory response to bacterial infections, along with its ligand peptidoglycan recognition protein 1 (PGLYRP1). TREM-1 is shed by matrix metalloproteinases (MMPs) to its soluble (s) form. The aim of the study is to investigate association of sTREM-1 and PGLYRP1 with oral inflammatory burden among patients with chronic kidney disease (CKD) at predialysis and posttransplantation stages. METHODS One hundred forty-four patients with CKD were examined at predialysis, and oral infection foci were treated prior to kidney transplantation. Fifty-three patients were available for follow-up after transplantation. Oral inflammatory burden was assessed by the Periodontal Inflammatory Burden Index (PIBI) and Total Dental Index. sTREM-1, PGLYRP1, and interleukin (IL)-1β were measured in saliva by enzyme-linked immunosorbent assay, and MMP-8 was measured by immunofluorometric assay. RESULTS In the predialysis stage, sTREM-1 and PGLYRP1 were positively associated with IL-1β, MMP-8, and PIBI. More specifically, patients with deeper probing depth (PD) (at least two sites with ≥6 mm) had higher concentrations of salivary sTREM-1 and PGLYRP1 compared with those with shallower PD. Higher concentrations of PGLYRP1 and IL-1β were associated with a higher number of teeth (> 25). On follow-up, higher PGLYRP1 and sTREM-1 were associated with one or more sites with ≥4 mm PD. CONCLUSIONS sTREM-1 and PGLYRP1 are elevated in patients with CKD with poor oral health and positively correlate with number of active periodontal pockets after oral infection therapy. Moreover, they positively correlate with MMP-8 and IL-1β. Hence, the salivary sTREM-1/PGLYRP1 axis could be useful as a diagnostic marker for oral infection within patients with CKD.
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Affiliation(s)
- Karita M Nylund
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Hellevi Ruokonen
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Timo Sorsa
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.,Department of Dental Medicine, Karolinska Insitutet, Huddinge, Sweden
| | - Anna Maria Heikkinen
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Jukka H Meurman
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Fernanda Ortiz
- Department of Nephrology, Abdominal Center, Helsinki University Hospital.,Folkhälsan Institute of Genetics, Folkhälsan Research Center, Helsinki, Finland
| | - Taina Tervahartiala
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Jussi Furuholm
- Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Nagihan Bostanci
- Department of Dental Medicine, Karolinska Insitutet, Huddinge, Sweden
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Kim SM, Kim EM, Ji KY, Lee HY, Yee SM, Woo SM, Yi JW, Yun CH, Choi H, Kang HS. TREM2 Acts as a Tumor Suppressor in Colorectal Carcinoma through Wnt1/ β-catenin and Erk Signaling. Cancers (Basel) 2019; 11:cancers11091315. [PMID: 31489935 PMCID: PMC6770495 DOI: 10.3390/cancers11091315] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Revised: 08/30/2019] [Accepted: 09/05/2019] [Indexed: 01/22/2023] Open
Abstract
TREM2 (triggering receptor expressed on myeloid cells) is involved in the development of malignancies. However, the function of TREM2 in colorectal cancer has not been clearly elucidated. Here, we investigated TREM2 function for the first time in colorectal epithelial cancer cells and demonstrated that TREM2 is a novel tumor suppressor in colorectal carcinoma. Blockade of TREM2 significantly promoted the proliferation of HT29 colorectal carcinoma cells by regulating cell cycle-related factors, such as p53 phosphorylation and p21 and cyclin D1 protein levels. HT29 cell migration was also increased by TREM2 inhibition via MMP9 (matrix metalloproteinase 9) expression upregulation. Furthermore, we found that the tumor suppressor effects of TREM2 were associated with Wnt/β-catenin and extracellular signal-regulated kinase (ERK) signaling. Importantly, the effect of TREM2 in the suppression of tumor development was demonstrated by in vivo and in vitro assays, as well as in human colon cancer patient tissue arrays. Overall, our results identify TREM2 as a potential prognostic biomarker and therapeutic target for colorectal cancer.
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Affiliation(s)
- Su-Man Kim
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
| | - Eun-Mi Kim
- Korea Institute of Toxicology, Daejeon, 34114, Korea.
| | - Kon-Young Ji
- Herbal Medicine Research Division, Korea Institute of Oriental Medicine, Daejeon 34054, Korea.
| | - Hwa-Youn Lee
- Medical Device Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 701-310, Korea.
| | - Su-Min Yee
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
| | - Su-Min Woo
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
| | - Ja-Woon Yi
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
| | - Chul-Ho Yun
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
| | - Harim Choi
- Department of Nursing, Nambu University, Gwangju 506-706, Korea.
| | - Hyung-Sik Kang
- School of Biological Sciences and Technology, Chonnam National University, Gwangju 500-757, Korea.
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Peng A, Lu X, Huang J, He M, Xu J, Huang H, Chen Q. Rheumatoid arthritis synovial fibroblasts promote TREM-1 expression in monocytes via COX-2/PGE 2 pathway. Arthritis Res Ther 2019; 21:169. [PMID: 31287012 PMCID: PMC6615166 DOI: 10.1186/s13075-019-1954-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 06/28/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Triggering receptor expressed on myeloid cells-1 (TREM-1) is inducible on monocyte/macrophages and neutrophils and amplifies the inflammatory response. The aim of this study was to determine whether rheumatoid arthritis synovial fibroblasts (RASF) promote the expression of TREM-1 in monocytes and its potential regulatory mechanism. METHODS Synovial fluid and paired peripheral blood from rheumatoid arthritis (RA) patients were analyzed using flow cytometry. Expression of TREM-1 in monocytes was detected after co-culture with RASF, with or without pre-treatment with toll-like receptor (TLR) ligands. Whether RASF-regulated TREM-1 level in monocytes require direct cell contact or soluble factors was evaluated by transwell experiment. COX-2 expression and PGE2 secretion in RASF were determined by quantitative PCR (qPCR) and ELISA. RASF, with and without TLR ligand stimulation, were treated with COX-2 inhibitors, COX-2 siRNA (siCOX-2) or EP1-4 antagonists, and the resulting TREM-1 level in CD14+ monocytes was measured using flow cytometry. RESULTS TREM-1 was highly expressed in CD14+ cells from peripheral blood and especially synovial fluid from RA patients. The expression of TREM-1 in monocytes was increased by co-culture with RASF. TLR-ligand-activated RASF further elevated TREM-1 level. Transwell assay indicated that soluble factors played a key role in RASF-promoted expression of TREM-1 in monocytes. RASF, with or without stimulation by TLR ligands, increased secretion of PGE2 in a cyclooxygenase (COX)-2-dependent manner. PGE2 enhanced the increase in TREM-1 level in monocytes. Finally, studies using COX-2 inhibitors, COX-2 siRNA (siCOX-2) and EP1-4 antagonists, showed that RASF promotion of TREM-1 expression in monocytes was mediated by COX-2/PGE2/EP2,4 signaling. CONCLUSIONS Our data is the first report to reveal the critical role of RASF in upregulating TREM-1 expression in monocytes, which indicates that TREM-1 might be a novel target for RA therapy.
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Affiliation(s)
- Anping Peng
- Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
| | - Xinyi Lu
- Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Jun Huang
- Department of Pathogenic Biology and Immunology, Guangzhou Medical University, Guangzhou, China
| | - Min He
- Department of Laboratory Science, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jianhua Xu
- Department of Laboratory Science, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Hui Huang
- Department of Laboratory Science, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qubo Chen
- Biological Resource Center, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China.
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Feng Y, Hong Y, Zhang X, Cao C, Yang X, Lai S, Fan C, Cheng F, Yan M, Li C, Huang W, Chen W, Zhu P, Zeng C. Genetic variants of TREML2 are associated with HLA-B27-positive ankylosing spondylitis. Gene 2018; 668:121-128. [PMID: 29778423 DOI: 10.1016/j.gene.2018.05.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Revised: 04/08/2018] [Accepted: 05/16/2018] [Indexed: 01/09/2023]
Abstract
Although ankylosing spondylitis (AS) is a common, highly heritable arthropathy, the precise genetic mechanism underlying the disease remains elusive. Here, we investigate the disease-causing mutations in a large AS family with distinguished complexity, consisting of 23 patients covering four generations and exhibiting a mixed HLA-B27 (+) and (-) status. Linkage analysis with 32 members using three methods and whole-exome sequencing analysis with three HLA-B27 (+) patients, one HLA-B27 (-) patient, and one healthy individual did not identify a mutation common to all of the patients, strongly suggesting the existence of genetic heterogeneity in this large pedigree. However, if only B27-positive patients were analyzed, the linkage analysis located a 22-Mb region harboring the HLA gene cluster in chromosome 6 (LOD = 4.2), and the subsequent exome analysis identified two non-synonymous mutations in the TREML2 and IP6K3 genes. These genes were resequenced among 370 sporadic AS patients and 487 healthy individuals. A significantly higher mutation frequency of TREML2 was observed in AS patients (1.51% versus 0.21%). The results obtained for the AS pedigree and sporadic patients suggest that mutation of TREML2 is a major factor leading to AS for HLA-B27 (+) members in this large family and that TREML2 is also a susceptibility gene promoting the development of ankylosing spondylitis in HLA-B27 (+) individuals.
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Affiliation(s)
- Yuan Feng
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Yaqiang Hong
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China
| | - Xin Zhang
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Chunwei Cao
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Xichao Yang
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Shujuan Lai
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Chunmei Fan
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Feng Cheng
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Mei Yan
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Chaohua Li
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Wan Huang
- Department of Cell Biology, Fourth Military Medical University, Xi'an, Shanxi Province, China
| | - Wei Chen
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Ping Zhu
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi Province, China.
| | - Changqing Zeng
- Key Laboratory of Genomic and Precision Medicine, Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Collaborative Innovation Center for Genetics and Development, Shanghai, China.
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Dai D, Xiong W, Fan Q, Wang H, Chen Q, Shen W, Zhang R, Ding F, Lu L, Tao R. Association of decreased serum sTREM-1 level with the severity of coronary artery disease: Inhibitory effect of sTREM-1 on TNF-α- and oxLDL-induced inflammatory reactions in endothelial cells. Medicine (Baltimore) 2016; 95:e4693. [PMID: 27631216 PMCID: PMC5402559 DOI: 10.1097/md.0000000000004693] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Soluble triggering receptor expressed on myeloid cells 1 (sTREM-1) is closely involved in autoimmune diseases and inflammatory reactions. We aimed to investigate whether serum sTREM-1 is related to coronary artery disease (CAD) and to evaluate the biological effects of sTREM-1 in cell experiments.This cross-sectional study included 263 consecutive patients with angiographically documented CAD, who were admitted for diagnosis and interventional treatment of CAD (CAD group), with 162 participants without CAD serving as controls (control group). Serum levels of sTREM-1 and high sensitivity C reactive protein (hsCRP) were determined in all participants. In cell experiments, the influence of sTREM-1 on tumor necrosis factor-α (TNF-α)- or oxidized low-density lipoprotein (oxLDL)-induced inflammatory reactions was evaluated in human umbilical vein endothelial cells (HUVECs).Serum level of sTREM-1 was significantly lower in CAD patients than in controls (P < 0.001). sTREM-1 values were related to the number of diseased coronary arteries (Spearman r = -0.413, P < 0.001) and the severity represented by Gensini score (Pearson r = -0.336, P < 0.001). Multivariable logistic regression analysis revealed that decreased sTREM-1 were independent determinants of CAD (OR = 0.428, P < 0.001). In cell experiments, recombinant sTREM-1 protein concentration-dependently inhibited the expression of IL-1β, IL-6, TNF-α, VCAM-1, and ICAM-1 induced by TNF-α or oxLDL in HUVECs.This study demonstrates that decreased serum sTREM-1 level is significantly associated with the presence and severity of CAD. sTREM-1 restrains inflammatory reaction in endothelial cells, suggesting that it might be a potential vascular protective factor.
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Affiliation(s)
| | | | - Qin Fan
- Department of Cardiology, Rui Jin Hospital
| | - Haibo Wang
- Institute of Cardiovascular Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | - Qiujing Chen
- Institute of Cardiovascular Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
| | | | | | | | - Lin Lu
- Department of Cardiology, Rui Jin Hospital
- Institute of Cardiovascular Diseases, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
- Correspondence: Rong Tao, Lin Lu, Department of Cardiology, Rui Jin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China (e-mail: , )
| | - Rong Tao
- Department of Cardiology, Rui Jin Hospital
- Correspondence: Rong Tao, Lin Lu, Department of Cardiology, Rui Jin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China (e-mail: , )
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Siegler BH, Weiterer S, Lichtenstern C, Stumpp D, Brenner T, Hofer S, Weigand MA, Uhle F. [Use of biomarkers in sepsis. Update and perspectives]. Anaesthesist 2015; 63:678-90. [PMID: 25002138 DOI: 10.1007/s00101-014-2347-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Sepsis and related complications are a challenge for intensive care medicine. Despite many advances in antibiotic therapy sepsis remains one of the most common diseases of patients in intensive care units and is designated as the main cause of death in critically ill patients. Persisting sepsis leads to impaired immunity, resulting in immunosuppression. Unspecific predictive signs complicate an early diagnosis; however, an early initiation of adequate therapy is of crucial importance for the prognosis. Scoring systems can be applied for the initial evaluation but are controversially discussed concerning the monitoring of disease progression and therapy as well as outcome prediction. Biomarkers are considered as a complementary approach.
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Affiliation(s)
- B H Siegler
- Klinik für Anaesthesiologie und Operative Intensivmedizin, Universitätsklinikum Gießen und Marburg, Standort Gießen, Rudolf-Buchheim Str. 7, 35392, Gießen, Deutschland
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Kojic D, Siegler BH, Uhle F, Lichtenstern C, Nawroth PP, Weigand MA, Hofer S, Brenner T. Are there new approaches for diagnosis, therapy guidance and outcome prediction of sepsis? World J Exp Med 2015; 5:50-63. [PMID: 25992320 PMCID: PMC4436940 DOI: 10.5493/wjem.v5.i2.50] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 01/09/2015] [Accepted: 04/02/2015] [Indexed: 02/06/2023] Open
Abstract
Beside many efforts to improve outcome, sepsis is still one of the most frequent causes of death in critically ill patients. It is the most common condition with high mortality in intensive care units. The complexity of the septic syndrome comprises immunological aspects - i.e., sepsis induced immunosuppression - but is not restricted to this fact in modern concepts. So far, exact mechanisms and variables determining outcome and mortality stay unclear. Since there is no typical risk profile, early diagnosis and risk stratification remain difficult, which hinders rapid and effective treatment initiation. Due to the heterogeneous nature of sepsis, potential therapy options should be adapted to the individual. Biomarkers like C-reactive protein and procalcitonin are routinely used as complementary tools in clinical decision-making. Beyond the acute phase proteins, a wide bunch of promising substances and non-laboratory tools with potential diagnostic and prognostic value is under intensive investigation. So far, clinical decision just based on biomarker assessment is not yet feasible. However, biomarkers should be considered as a complementary approach.
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Yan Q, Sun L, Zhu Z, Wang L, Li S, Ye RD. Jmjd3-mediated epigenetic regulation of inflammatory cytokine gene expression in serum amyloid A-stimulated macrophages. Cell Signal 2014; 26:1783-91. [PMID: 24703936 DOI: 10.1016/j.cellsig.2014.03.025] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 03/21/2014] [Accepted: 03/25/2014] [Indexed: 11/17/2022]
Abstract
Serum amyloid A (SAA), a major acute-phase protein, has potent cytokine-like activities in isolated phagocytes and synovial fibroblasts. SAA-induced proinflammatory cytokine gene expression requires transcription factors such as NF-κB; however, the associated epigenetic regulatory mechanism remains unclear. Here we report that Jmjd3, a histone H3 lysine 27 (H3K27) demethylase, is highly inducible in SAA-stimulated macrophages and plays an important role in the induction of inflammatory cytokine genes. SAA-induced Jmjd3 expression leads to reduced H3K27 trimethylation. Silencing of Jmjd3 expression significantly inhibited SAA-induced expression of proinflammatory cytokines including IL-23p19, G-CSF and TREM-1, along with up-regulation of H3K27 trimethylation levels on their promoters. Depletion of Jmjd3 expression also attenuated the release of proinflammatory cytokine genes in a peritonitis model and ameliorated neutrophilia in SAA-stimulated mice. Finally, we observed that Jmjd3 is essential for SAA-enhanced macrophage foam cell formation by oxidized LDL. Taken together, these results illustrate a Jmjd3-dependent epigenetic regulatory mechanism for proinflammatory cytokine gene expression in SAA-stimulate macrophages. This mechanism may be subject to therapeutic intervention for sterile inflammation and atherosclerosis.
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Affiliation(s)
- Qian Yan
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Lei Sun
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Ziyan Zhu
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Lili Wang
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Shuqin Li
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Richard D Ye
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, P.R. China; Department of Pharmacology, University of Illinois College of Medicine, Chicago, IL 60612, United States.
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Electrical activity of the diaphragm (EAdi) as a monitoring parameter in difficult weaning from respirator: a pilot study. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2013; 17:R182. [PMID: 23985299 PMCID: PMC4057029 DOI: 10.1186/cc12865] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Accepted: 08/02/2013] [Indexed: 11/10/2022]
Abstract
INTRODUCTION A reliable prediction of successful weaning from respiratory support may be crucial for the overall outcome of the critically ill patient. The electrical activity of the diaphragm (EAdi) allows one to monitor the patients' respiratory drive and their ability to meet the increased respiratory demand. In this pilot study, we compared the EAdi with conventional parameters of weaning failure, such as the ratio of respiratory rate to tidal volume. METHODS We studied 18 mechanically ventilated patients considered difficult to wean. For a spontaneous breathing trial (SBT), the patients were disconnected from the ventilator and given oxygen through a T-piece. The SBT was evaluated by using standard criteria. RESULTS Twelve patients completed the SBT successfully, and six failed. The EAdi was significantly different in the two groups. We found an early increase in EAdi in the failing patients that was more pronounced than in any of the patients who successfully passed the SBT. Changes in EAdi predicted an SBT failure earlier than did conventional parameters. CONCLUSIONS EAdi monitoring adds valuable information during weaning from the ventilator and may help to identify patients who are not ready for discontinuation of respiratory support.
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Pierobon D, Bosco MC, Blengio F, Raggi F, Eva A, Filippi M, Musso T, Novelli F, Cappello P, Varesio L, Giovarelli M. Chronic hypoxia reprograms human immature dendritic cells by inducing a proinflammatory phenotype and TREM-1 expression. Eur J Immunol 2013; 43:949-66. [PMID: 23436478 DOI: 10.1002/eji.201242709] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Revised: 12/21/2012] [Accepted: 01/25/2013] [Indexed: 12/30/2022]
Abstract
DCs are powerful antigen-presenting cells central in the orchestration of innate and acquired immunity. DC development, migration, and activities are intrinsically linked to the microenvironment. DCs migrate through pathologic tissues before reaching their final destination in the lymph nodes. Hypoxia, a condition of low partial oxygen pressure, is a common feature of many pathologic situations, capable of modifying DC phenotype and functional behavior. We studied human monocyte-derived immature DCs generated under chronic hypoxic conditions (H-iDCs). We demonstrate by gene expression profiling the upregulation of a cluster of genes coding for antigen-presentation, immunoregulatory, and pattern recognition receptors, suggesting a stimulatory role for hypoxia on iDC immunoregulatory functions. In particular, we show that H-iDCs express triggering receptor expressed on myeloid cells(TREM-1), a member of the Ig superfamily of immunoreceptors and an amplifier of inflammation. This effect is reversible because H-iDC reoxygenation results in TREM-1 down-modulation. TREM-1 engagement promotes upregulation of T-cell costimulatory molecules and homing chemokine receptors, typical of mature DCs, and increases the production of proinflammatory, Th1/Th17-priming cytokines/chemokines, resulting in increased T-cell responses. These results suggest that TREM-1 induction by the hypoxic microenvironment represents a mechanism of regulation of Th1-cell trafficking and activation by iDCs differentiated at pathologic sites.
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Affiliation(s)
- Daniele Pierobon
- Department of Molecular Biotechnology and Health Sciences, University of Torino, Torino, Italy
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Bostanci N, Oztürk VÖ, Emingil G, Belibasakis GN. Elevated oral and systemic levels of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) in periodontitis. J Dent Res 2012; 92:161-5. [PMID: 23242230 DOI: 10.1177/0022034512470691] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
The Triggering Receptor Expressed on Myeloid cells 1 (TREM-1) is a cell-surface receptor of the immunoglobulin superfamily, involved in the propagation of the inflammatory response to bacterial challenge. Soluble (s)TREM-1 is released from the cell surface during the course of infection and is a useful inflammatory biomarker in the early diagnosis of systemic sepsis. The hypothesis of this study was that oral and systemic levels of sTREM-1 are elevated in periodontitis. Therefore, the aim was to investigate, by ELISA, the sTREM-1 concentrations in saliva and serum of individuals without periodontitis (control) and persons with chronic or generalized aggressive periodontitis. In saliva, sTREM-1 concentrations were higher in chronic and aggressive periodontitis than in the control group, by 3.3-fold and 5.6-fold, respectively. In serum, these differences were 1.7-fold and 2-fold, respectively. However, there were no significant differences between the two forms of periodontitis, neither in saliva nor in serum. Salivary and serum sTREM-1 levels positively correlated with full-mouth clinical periodontal parameters. In conclusion, the increased oral and systemic levels of sTREM-1 in periodontitis denote a value for this molecule as a biomarker for the disease and may also have implications in the association between periodontal infections and systemic inflammatory response.
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Affiliation(s)
- N Bostanci
- Oral Translational Research, Institute of Oral Biology, Center of Dental Medicine, University of Zürich, Switzerland.
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Wu Y, Wang F, Fan X, Bao R, Bo L, Li J, Deng X. Accuracy of plasma sTREM-1 for sepsis diagnosis in systemic inflammatory patients: a systematic review and meta-analysis. CRITICAL CARE : THE OFFICIAL JOURNAL OF THE CRITICAL CARE FORUM 2012. [PMID: 23194114 PMCID: PMC3672614 DOI: 10.1186/cc11884] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Introduction Early diagnosis of sepsis is vital to the clinical course and outcome of septic patients. Recently, soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) appears to be a potential marker of infection. The objective of this systematic review and meta-analysis was to evaluate the accuracy of plasma sTREM-1 for sepsis diagnosis in systemic inflammatory patients. Methods A systematic literature search of PubMed, Embase and Cochrane Central Register of Controlled Trials was performed using specific search terms (up to 15 October 2012). Studies were included if they assessed the accuracy of plasma sTREM-1 for sepsis diagnosis in adult patients with systemic inflammatory response syndrome (SIRS) and provided sufficient information to construct a 2 X 2 contingency table. Results Eleven studies with a total of 1,795 patients were included. The pooled sensitivity and specificity was 79% (95% confidence interval (CI), 65 to 89) and 80% (95% CI, 69 to 88), respectively. The positive likelihood ratio, negative likelihood ratio and diagnostic odds ratio were 4.0 (95% CI, 2.4 to 6.9), 0.26 (95% CI, 0.14 to 0.48), and 16 (95% CI, 5 to 46), respectively. The area under the curve of the summary receiver operator characteristic was 0.87 (95% CI, 0.84 to 0.89). Meta-regression analysis suggested that patient sample size and assay method were the main sources of heterogeneity. Publication bias was suggested by an asymmetrical funnel plot (P = 0.02). Conclusions The present meta-analysis showed that plasma sTREM-1 had a moderate diagnostic performance in differentiating sepsis from SIRS. Accordingly, plasma sTREM-1 as a single marker was not sufficient for sepsis diagnosis in systemic inflammatory patients.
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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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Bostanci N, Belibasakis GN. Doxycycline inhibits TREM-1 induction by Porphyromonas gingivalis. ACTA ACUST UNITED AC 2012; 66:37-44. [DOI: 10.1111/j.1574-695x.2012.00982.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2012] [Revised: 03/12/2012] [Accepted: 04/25/2012] [Indexed: 12/15/2022]
Affiliation(s)
- Nagihan Bostanci
- Oral Translational Research; Institute of Oral Biology; Center of Dental Medicine; University of Zürich; Zürich; Switzerland
| | - Georgios N. Belibasakis
- Oral Microbiology and Immunology; Institute of Oral Biology; Center of Dental Medicine; University of Zürich; Zürich; Switzerland
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Involvement of the TREM-1/DAP12 pathway in the innate immune responses to Porphyromonas gingivalis. Mol Immunol 2011; 49:387-94. [DOI: 10.1016/j.molimm.2011.09.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 09/15/2011] [Accepted: 09/16/2011] [Indexed: 11/17/2022]
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Hypoxia modulates the gene expression profile of immunoregulatory receptors in human mature dendritic cells: identification of TREM-1 as a novel hypoxic marker in vitro and in vivo. Blood 2010; 117:2625-39. [PMID: 21148811 DOI: 10.1182/blood-2010-06-292136] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Dendritic cells (DCs) are a heterogeneous group of professional antigen-presenting cells functioning as sentinels of the immune system and playing a key role in the initiation and amplification of innate and adaptive immune responses. DC development and functions are acquired during a complex differentiation and maturation process influenced by several factors present in the local milieu. A common feature at pathologic sites is represented by hypoxia, a condition of low pO(2), which creates a unique microenvironment affecting cell phenotype and behavior. Little is known about the impact of hypoxia on the generation of mature DCs (mDCs). In this study, we identified by gene expression profiling a significant cluster of genes coding for immune-related cell surface receptors strongly up-regulated by hypoxia in monocyte-derived mDCs and characterized one of such receptors, TREM-1, as a new hypoxia-inducible gene in mDCs. TREM-1 associated with DAP12 in hypoxic mDCs, and its engagement elicited DAP12-linked signaling, resulting in ERK-1, Akt, and IκBα phosphorylation and proinflammatory cytokine and chemokine secretion. Finally, we provided the first evidence that TREM-1 is expressed on mDCs infiltrating the inflamed hypoxic joints of children affected by juvenile idiopathic arthritis, representing a new in vivo marker of hypoxic mDCs endowed with proinflammatory properties.
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