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Yew JS, Ong SK, Lim HX, Tan SH, Ong KC, Wong KT, Poh CL. Immunogenicity of trivalent DNA vaccine candidate encapsulated in Chitosan-TPP nanoparticles against EV-A71 and CV-A16. Nanomedicine (Lond) 2024; 19:1779-1799. [PMID: 39140594 PMCID: PMC11418279 DOI: 10.1080/17435889.2024.2372243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Accepted: 06/21/2024] [Indexed: 08/15/2024] Open
Abstract
Aim: To develop a trivalent DNA vaccine candidate encapsulated in Chitosan-TPP nanoparticles against hand foot and mouth disease (HFMD) and assess its immunogenicity in mice.Materials & methods: Trivalent plasmid carrying the VP1 and VP2 genes of EV-A71, VP1 gene of CV-A16 was encapsulated in Chitosan-TPP nanoparticles through ionic gelation. In vitro characterization and in vivo immunization studies of the CS-TPP-NPs (pIRES-VP121) were performed.Results: Mice administered with CS-TPP NPs (pIRES-VP121) intramuscularly were observed to have the highest IFN-γ response. Sera from mice immunized with the naked pDNA and CS-TPP-NPs (pIRES-VP121) demonstrated good viral clearance against wild-type EV-A71 and CV-A16 in RD cells.Conclusion: CS-TPP-NPs (pIRES-VP121) could serve as a prototype for future development of multivalent HFMD DNA vaccine candidates.
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Affiliation(s)
- Jia Sheng Yew
- Centre for Virus & Vaccine Research, School of Medical & Life Sciences, Sunway University, Petaling Jaya, 47500, Malaysia
| | - Seng-Kai Ong
- Department of Biological science, School of Medical & Life Sciences, Sunway University, Petaling Jaya, 47500, Malaysia
| | - Hui Xuan Lim
- Centre for Virus & Vaccine Research, School of Medical & Life Sciences, Sunway University, Petaling Jaya, 47500, Malaysia
- Sunway Microbiome Centre, School of Medical & Life Sciences, Sunway University, Petaling Jaya, 47500, Malaysia
| | - Soon Hao Tan
- Department of Biomedical Science, Faculty of Medicine, Universiti Malaya, Federal Territory of Kuala Lumpur, Kuala Lumpur, 50603, Malaysia
| | - Kien Chai Ong
- Department of Biomedical Science, Faculty of Medicine, Universiti Malaya, Federal Territory of Kuala Lumpur, Kuala Lumpur, 50603, Malaysia
| | - Kum Thong Wong
- Department of Pathology, Faculty of Medicine, Universiti Malaya, Federal Territory of Kuala Lumpur, Kuala Lumpur, 50603, Malaysia
| | - Chit Laa Poh
- Centre for Virus & Vaccine Research, School of Medical & Life Sciences, Sunway University, Petaling Jaya, 47500, Malaysia
- ALPS Global Holding Berhad, The ICON, No.1, Off Jalan Tun Razak, Kuala Lumpur, 50400, Malaysia
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Gibot S, Lafon T, Jacquin L, Lefevre B, Kimmoun A, Guillaumot A, Losser MR, Douplat M, Argaud L, De Ciancio G, Jolly L, Touly N, Derive M, Malaplate C, Luc A, Baumann C, François B. Soluble TREM-1 plasma concentration predicts poor outcome in COVID-19 patients. Intensive Care Med Exp 2023; 11:51. [PMID: 37574520 PMCID: PMC10423708 DOI: 10.1186/s40635-023-00532-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 07/05/2023] [Indexed: 08/15/2023] Open
Abstract
BACKGROUND The immuno-receptor Triggering Expressed on Myeloid cells-1 (TREM-1) is activated during bacterial infectious diseases, where it amplifies the inflammatory response. Small studies suggest that TREM-1 could be involved in viral infections, including COVID-19. We here aim to decipher whether plasma concentration of the soluble form of TREM-1 (sTREM-1) could predict the outcome of hospitalized COVID-19 patients. METHODS We conducted a multicentre prospective observational study in 3 university hospitals in France. Consecutive hospitalized patients with confirmed infection with SARS-CoV-2 were enrolled. Plasma concentration of sTREM-1 was measured on admission and then at days 4, 6, 8, 14, 21, and 28 in patients admitted into an ICU (ICU cohort: ICUC) or 3 times a week for patients hospitalized in a medical ward (Conventional Cohort: ConvC). Clinical and biological data were prospectively recorded and patients were followed-up for 90 days. For medical ward patients, the outcome was deemed complicated in case of requirement of increased oxygen supply > 5 L/min, transfer to an ICU, or death. For Intensive Care Unit (ICU) patients, complicated outcome was defined by death in the ICU. RESULTS Plasma concentration of sTREM-1 at inclusion was higher in ICU patients (n = 269) than in medical ward patients (n = 562) (224 pg/mL (IQR 144-320) vs 147 pg/mL (76-249), p < 0.0001), and higher in patients with a complicated outcome in both cohorts: 178 (94-300) vs 135 pg/mL (70-220), p < 0.0001 in the ward patients, and 342 (288-532) vs 206 pg/mL (134-291), p < 0.0001 in the ICU patients. Elevated sTREM-1 baseline concentration was an independent predictor of complicated outcomes (Hazard Ratio (HR) = 1.5 (1.1-2.1), p = 0.02 in ward patients; HR = 3.8 (1.8-8.0), p = 0.0003 in ICU patients). An sTREM-1 plasma concentration of 224 pg/mL had a sensitivity of 42%, and a specificity of 76% in the ConvC for complicated outcome. In the ICUC, a 287 pg/mL cutoff had a sensitivity of 78%, and a specificity of 74% for death. The sTREM-1 concentrations increased over time in the ConvC patients with a complicated outcome (p = 0.017), but not in the ICUC patients. CONCLUSIONS In COVID-19 patients, plasma concentration of sTREM-1 is an independent predictor of the outcome, although its positive and negative likelihood ratio are not good enough to guide clinical decision as a standalone marker.
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Affiliation(s)
- Sébastien Gibot
- Médecine Intensive et Réanimation, Hôpital Central, Université de Lorraine, CHRU-Nancy, 54000, Nancy, France.
- Service de Médecine Intensive et Réanimation, Hôpital Central, 29 Avenue de Lattre de Tassigny, 54035, Nancy Cedex, France.
| | - Thomas Lafon
- Emergency Department, Limoges University Hospital Center, 87000, Limoges, France
- Inserm CIC 1435, Limoges University Hospital Center, 87000, Limoges, France
| | - Laurent Jacquin
- Emergency Department, Hospices Civils de Lyon, Hôpital Edouard Herriot, 69003, Lyon, France
| | - Benjamin Lefevre
- Service des Maladies Infectieuses et Tropicales, Université de Lorraine, CHRU-Nancy, 54000, Nancy, France
| | - Antoine Kimmoun
- Médecine Intensive et Réanimation, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Anne Guillaumot
- Département de Pneumologie, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Marie-Reine Losser
- Réanimation Chirurgicale, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Marion Douplat
- Emergency Department, Hospices Civils de Lyon, Hôpital Lyon Sud Pierre Benite, 69000, Lyon, France
| | - Laurent Argaud
- Service de Médecine Intensive-Réanimation, Hospices Civils de Lyon, Hôpital Edouard Herriot, 69003, Lyon, France
| | - Guillaume De Ciancio
- Département de Cardiologie, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Lucie Jolly
- Inotrem Sa, Faculté de Médecine de Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Nina Touly
- Inotrem Sa, Faculté de Médecine de Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Marc Derive
- Inotrem Sa, Faculté de Médecine de Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Catherine Malaplate
- Laboratoire de Biochimie, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
- Centre de Ressources Biologiques Lorraine, CHRU Nancy, Hôpital Brabois, 54500, Vandoeuvre-Les-Nancy, France
| | - Amandine Luc
- Unité de Méthodologie, Data Management et Statistiques, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Cédric Baumann
- Unité de Méthodologie, Data Management et Statistiques, Hôpital Brabois, Université de Lorraine, CHRU-Nancy, 54500, Vandoeuvre-Les-Nancy, France
| | - Bruno François
- Réanimation Polyvalente et Inserm CIC-1435 & UMR-1092, CHU Limoges, 87000, Limoges, France
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Ruiz-Pacheco JA, Muñoz-Medina EJ, Castillo-Díaz LA, Chacón-Salinas R, Escobar-Gutiérrez A. Dengue Virus Increases the Expression of TREM-1 and CD10 on Human Neutrophils. Viral Immunol 2023; 36:176-185. [PMID: 36811498 DOI: 10.1089/vim.2022.0124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
Every year, dengue is responsible for 400 million infections worldwide. Inflammation is related to the development of severe forms of dengue. Neutrophils are a heterogeneous cell population with a key role in the immune response. During viral infection, neutrophils are mainly recruited to the infection site; however, their excessive activation is linked to deleterious results. During dengue infection, neutrophils are involved in the pathogenesis through neutrophils extracellular traps production, tumor necrosis factor-alpha, and interleukin-8 secretion. However, other molecules regulate the neutrophil role during viral infection. TREM-1 is expressed on neutrophils and its activation is related to increased production of inflammatory mediators. CD10 is expressed on mature neutrophils and has been associated with the regulation of neutrophil migration and immunosuppression. However, the role of both molecules during viral infection is limited, particularly during dengue infection. Here, we report for the first time that DENV-2 can significantly increase TREM-1 and CD10 expression as well as sTREM-1 production in cultured human neutrophils. Furthermore, we observed that treatment with granulocyte-macrophage colony stimulating factor, a molecule mostly produced in severe cases of dengue, is capable of inducing the overexpression of TREM-1 and CD10 on human neutrophils. These results suggest the participation of neutrophil CD10 and TREM-1 in the pathogenesis of dengue infection.
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Affiliation(s)
- Juan A Ruiz-Pacheco
- Investigador por México, División de Investigación Quirúrgica, Centro de Investigaciones Biomédicas de Occidente, IMSS, Guadalajara, México
| | - E José Muñoz-Medina
- División de Laboratorios de Vigilancia e Investigación Epidemiológica, Instituto Mexicano del Seguro Social, Ciudad de México, México
| | - Luis A Castillo-Díaz
- División de Ciencias Biológicas y de la Salud, Departamento de Medicina y Ciencias de la Salud, Universidad de Sonora, Hermosillo, México
| | - Rommel Chacón-Salinas
- Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas, IPN, Ciudad de México, México
| | - Alejandro Escobar-Gutiérrez
- Coordinación de Investigaciones Inmunológicas, Instituto de Diagnóstico y Referencia Epidemiológicos, "Dr. Manuel Martínez Báez," Secretaría de Salud, Ciudad de México, México
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Shen P, Zhang T, Chen G, Zhang B, Huang A, Duan L, Zhu D, Chen J, Wang J, Duan Y. Recombinant P40 protein of Schistosoma japonicum inhibits TREM-1 expression in RAW264.7 cells via FOXO3a. Biomed Pharmacother 2022; 149:112826. [PMID: 35306429 DOI: 10.1016/j.biopha.2022.112826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 03/06/2022] [Accepted: 03/14/2022] [Indexed: 11/02/2022] Open
Abstract
Triggering receptor expressed on myeloid cells 1 (TREM-1) is a transmembrane glycoprotein receptor and TREM-1 expression reached the peak at 6 weeks after infection with Schistosoma japonicum and inhibited subsequently. Since TREM-1 may be involved in the macrophage polarization process, the reason for the inhibition of TREM-1 expression in chronic schistosomiasis engaged us in them. In this study, flow cytometry was used to observe TREM-1 expression in peritoneal macrophages from mice infected with Schistosoma japonicum. Since P40 is one of the main components from schistosoma eggs, western blot and dual-luciferase reporter assays were performed to observe the effect of recombinant Schistosoma japonicum P40 protein (rSjP40) on TREM-1 expression in the mouse leukemic monocyte/macrophage cell line RAW264.7. These methods were also conducted to observe the effect of FOXO3a on the expression of TREM-1 in RAW264.7 cells, and a ChIP assay was performed to confirm the binding site of FOXO3a to the TREM-1 promoter. Our results showed that TREM-1 expression reached the peak in peritoneal macrophages from mice at 6 weeks after infection with Schistosoma japonicum. rSjP40 inhibited TREM-1 promoter activity at the position of - 1924 ~ - 1531 bp. rSjP40 down-regulated TREM-1 and FOXO3a protein expression in RAW264.7 cells. TREM-1 protein expression may be regulated by binding of FOXO3a to the promoter of TREM-1 in RAW264.7 cells. In conclusion, we found that rSjP40 inhibited TREM-1 expression in macrophages by inhibiting FOXO3a expression. This study will provide the basis for the study to explore the role of TREM-1 in Schistosoma japonicum infection.
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Affiliation(s)
- Pei Shen
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China; Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Tianyu Zhang
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Guo Chen
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Bei Zhang
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Ailong Huang
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Lian Duan
- Department of Medical Informatics, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China.
| | - Dandan Zhu
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Jinling Chen
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Jianxin Wang
- Department of Laboratory Medicine, Affiliated Hospital of Nantong University, 20 Xisi Road, Nantong 226001, Jiangsu, People's Republic of China
| | - Yinong Duan
- Department of Pathogen Biology, School of Medicine, Nantong University, 19 Qixiu Road, Nantong 226001, Jiangsu, People's Republic of China.
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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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Li J, Yang S, Liu S, Chen Y, Liu H, Su Y, Liu R, Cui Y, Song Y, Teng Y, Wang T. Transcriptomic Profiling Reveals a Role for TREM-1 Activation in Enterovirus D68 Infection-Induced Proinflammatory Responses. Front Immunol 2021; 12:749618. [PMID: 34887856 PMCID: PMC8650217 DOI: 10.3389/fimmu.2021.749618] [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: 07/29/2021] [Accepted: 11/04/2021] [Indexed: 11/18/2022] Open
Abstract
Increasing cases related to the pathogenicity of Enterovirus D68 (EV-D68) have made it a growing worldwide public health concern, especially due to increased severe respiratory illness and acute flaccid myelitis (AFM) in children. There are currently no vaccines or medicines to prevent or treat EV-D68 infections. Herein, we performed genome-wide transcriptional profiling of EV-D68-infected human rhabdomyosarcoma (RD) cells to investigate host-pathogen interplay. RNA sequencing and subsequent experiments revealed that EV-D68 infection induced a profound transcriptional dysregulation of host genes, causing significantly elevated inflammatory responses and altered antiviral immune responses. In particular, triggering receptor expressed on myeloid cells 1 (TREM-1) is involved in highly activated TREM-1 signaling processes, acting as an important mediator in EV-D68 infection, and it is related to upregulation of interleukin 8 (IL-8), IL-6, IL-12p70, IL-1β, and tumor necrosis factor alpha (TNF-α). Further results demonstrated that NF-κB p65 was essential for EV-D68-induced TREM-1 upregulation. Moreover, inhibition of the TREM1 signaling pathway by the specific inhibitor LP17 dampened activation of the p38 mitogen-activated protein kinase (MAPK) signaling cascade, suggesting that TREM-1 mainly transmits activation signals to phosphorylate p38 MAPK. Interestingly, treatment with LP17 to inhibit TREM-1 inhibited viral replication and infection. These findings imply the pathogenic mechanisms of EV-D68 and provide critical insight into therapeutic intervention in enterovirus diseases.
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Affiliation(s)
- Jinyu Li
- School of Life Sciences, Tianjin University, Tianjin, China.,State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Shan Yang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Sihua Liu
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Yulu Chen
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Hongyun Liu
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Yazhi Su
- School of Life Sciences, Tianjin University, Tianjin, China
| | - Ruicun Liu
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yujun Cui
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yajun Song
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Yue Teng
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Tao Wang
- School of Life Sciences, Tianjin University, Tianjin, China.,Institute of Tianjin Key Laboratory of Function and Application of Biological Macromolecular Structures, Tianjin, China
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Abstract
Triggering Receptor Expressed on Myeloid Cells 1 (TREM-1) amplifies the immune response, operating synergistically with Toll-Like Receptors (TLRs) in the production of inflammatory mediators. TREM-1 signaling depends on the adapter protein DAP12, which results in the activation of NFkB, the expression of inflammatory genes, and the release of antimicrobial peptides, such as Beta-defensin 2. We evaluated the activation of the TREM-1 signaling pathways in Cutaneous Leishmaniasis (CL) caused by Leishmania braziliensis and linage human keratinocytes exposed to these parasites since the host immune response against Leishmania plays a critical role in promoting parasite killing but also participates in inflammation and tissue damage. We analyzed publicly available transcriptome data from the lesions of CL patients. In the CL biopsies, we found increased expression of the molecules involved in the TREM-1 pathway. We then validated these findings with RT-qPCR and immunohistochemistry in newly obtained biopsies. Surprisingly, we found a strong labeling of TREM-1 in keratinocytes, prompting the hypothesis that increased TREM-1 activation may be the result of tissue damage. However, increased TREM-1 expression was only seen in human lineage keratinocytes following parasite stimulation. Moreover, no up-regulation of TREM-1 expression was observed in the skin lesions caused by other non-infectious inflammatory diseases. Together, these findings indicate that L. braziliensis (Lb) induces the expression of the TREM-1 receptor in tissue keratinocytes regardless of tissue damage, suggesting that non-immune skin cells may play a role in the inflammatory response of CL.
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Abstract
Hand, Foot and Mouth Disease (HFMD) is usually a self-limiting, mild childhood disease that is caused mainly by Coxsackie virus A16 (CVA16) and Enterovirus A71 (EV-A71), both members of the Picornaviridae family. However, recurring HFMD outbreaks and epidemics due to EV-A71 infection in the Western Pacific region, and the propensity of EV-A71 strains to cause severe neurological complications have made this neurotropic virus a serious public health concern in afflicted countries. High mutation rate leading to viral quasispecies combined with frequent intra- and inter-typic recombination events amongst co-circulating EV-A71 strains have contributed to the great diversity and fast evolution of EV-A71 genomes, making impossible any accurate prediction of the next epidemic strain. Comparative genome sequence analyses and mutagenesis approaches have led to the identification of a number of viral determinants involved in EV-A71 fitness and virulence. These viral determinants include amino acid residues located in the structural proteins of the virus, affecting attachment to the host cell surface, receptor binding, and uncoating events. Critical residues in non-structural proteins have also been identified, including 2C, 3A, 3C proteases and the RNA-dependent RNA polymerase. Finally, mutations altering key secondary structures in the 5’ untranslated region were also found to influence EV-A71 fitness and virulence. While our current understanding of EV-A71 pathogenesis remains fragmented, these studies may help in the rational design of effective treatments and broadly protective vaccine candidates.
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Affiliation(s)
- Pei Yi Ang
- Infectious Diseases Translational Research Programme, Department of Microbiology&Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Immunology programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
| | - Connie Wan Hui Chong
- Infectious Diseases Translational Research Programme, Department of Microbiology&Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Immunology programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
| | - Sylvie Alonso
- Infectious Diseases Translational Research Programme, Department of Microbiology&Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,Immunology programme, Life Sciences Institute, Centre for Life Sciences, National University of Singapore, 28 Medical Drive, Singapore 117456, Singapore
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de Sá Resende A, Matos de Oliveira YL, Rodrigues de Moura T, Martins-Filho PR. Potential role of Triggering Receptor Expressed on Myeloid Cells-1 (TREM-1) in SARS-CoV-2 infection: First insights. EXCLI JOURNAL 2021; 20:722-723. [PMID: 34040499 PMCID: PMC8144538 DOI: 10.17179/excli2021-3581] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 03/25/2021] [Indexed: 12/13/2022]
Affiliation(s)
- Ayane de Sá Resende
- Health Sciences Graduate Program, Federal University of Sergipe, Aracaju, Sergipe, Brazil
| | | | | | - Paulo Ricardo Martins-Filho
- Health Sciences Graduate Program, Federal University of Sergipe, Aracaju, Sergipe, Brazil.,Investigative Pathology Laboratory, Federal University of Sergipe, Aracaju, Sergipe, Brazil
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de Oliveira Matos A, Dos Santos Dantas PH, Figueira Marques Silva-Sales M, Sales-Campos H. The role of the triggering receptor expressed on myeloid cells-1 (TREM-1) in non-bacterial infections. Crit Rev Microbiol 2020; 46:237-252. [PMID: 32326783 DOI: 10.1080/1040841x.2020.1751060] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The triggering receptor expressed on myeloid cells 1 (TREM-1) is a receptor of the innate immune system, expressed mostly by myeloid cells and primarily associated with pro- inflammatory responses. Although the exact nature of its ligands has not yet been fully elucidated, many microorganisms or danger signals have been proposed as inducers of its activation or the secretion of sTREM-1, the soluble form with putative anti-inflammatory effects. In the course of the 20 years since its first description, several studies have investigated the involvement of TREM-1 in bacterial infections. However, the number of studies describing the role of TREM-1 in fungal, viral and parasite-associated infections has only increased in the last few years, showing a diverse contribution of the receptor in these scenarios, with beneficial or detrimental activities depending on the context. Therefore, this review aims to discuss how TREM-1 may influence viral, fungal and parasitic infection outcomes, highlighting its potential as a therapeutic target and biomarker for diagnosis and prognosis of non-bacterial infectious diseases.
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