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Lajqi T, Köstlin-Gille N, Bauer R, Zarogiannis SG, Lajqi E, Ajeti V, Dietz S, Kranig SA, Rühle J, Demaj A, Hebel J, Bartosova M, Frommhold D, Hudalla H, Gille C. Training vs. Tolerance: The Yin/Yang of the Innate Immune System. Biomedicines 2023; 11:biomedicines11030766. [PMID: 36979747 PMCID: PMC10045728 DOI: 10.3390/biomedicines11030766] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/26/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
For almost nearly a century, memory functions have been attributed only to acquired immune cells. Lately, this paradigm has been challenged by an increasing number of studies revealing that innate immune cells are capable of exhibiting memory-like features resulting in increased responsiveness to subsequent challenges, a process known as trained immunity (known also as innate memory). In contrast, the refractory state of endotoxin tolerance has been defined as an immunosuppressive state of myeloid cells portrayed by a significant reduction in the inflammatory capacity. Both training as well tolerance as adaptive features are reported to be accompanied by epigenetic and metabolic alterations occurring in cells. While training conveys proper protection against secondary infections, the induction of endotoxin tolerance promotes repairing mechanisms in the cells. Consequently, the inappropriate induction of these adaptive cues may trigger maladaptive effects, promoting an increased susceptibility to secondary infections—tolerance, or contribute to the progression of the inflammatory disorder—trained immunity. This review aims at the discussion of these opposing manners of innate immune and non-immune cells, describing the molecular, metabolic and epigenetic mechanisms involved and interpreting the clinical implications in various inflammatory pathologies.
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Affiliation(s)
- Trim Lajqi
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Correspondence: (T.L.); (C.G.)
| | - Natascha Köstlin-Gille
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Reinhard Bauer
- Institute of Molecular Cell Biology, Jena University Hospital, D-07745 Jena, Germany
| | - Sotirios G. Zarogiannis
- Department of Physiology, School of Health Sciences, Faculty of Medicine, University of Thessaly, GR-41500 Larissa, Greece
| | - Esra Lajqi
- Department of Radiation Oncology, Heidelberg University Hospital, D-69120 Heidelberg, Germany
| | - Valdrina Ajeti
- Department of Pharmacy, Alma Mater Europaea—Campus College Rezonanca, XK-10000 Pristina, Kosovo
| | - Stefanie Dietz
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Simon A. Kranig
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
| | - Jessica Rühle
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Ardian Demaj
- Faculty of Medical Sciences, University of Tetovo, MK-1200 Tetova, North Macedonia
| | - Janine Hebel
- Department of Neonatology, University of Tübingen, D-72076 Tübingen, Germany
| | - Maria Bartosova
- Center for Pediatric and Adolescent Medicine Heidelberg, University of Heidelberg, D-69120 Heidelberg, Germany
| | - David Frommhold
- Klinik für Kinderheilkunde und Jugendmedizin, D-87700 Memmingen, Germany
| | - Hannes Hudalla
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
| | - Christian Gille
- Department of Neonatology, Heidelberg University Children’s Hospital, D-69120 Heidelberg, Germany
- Correspondence: (T.L.); (C.G.)
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2
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Fedotov VD, Zhestkov A, Lyamin AV, Zaslavskaya M, Dobrotina I, Tulichev A. Microbiota in the pathogenesis of COPD and its impact on the course of the disease. CLINICAL MICROBIOLOGY AND ANTIMICROBIAL CHEMOTHERAPY 2022. [DOI: 10.36488/cmac.2022.3.202-212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Chronic obstructive pulmonary disease (COPD) is a serious problem for global health. Infectious agents play a main role in the development of COPD exacerbations. Bacterial colonization of the lower respiratory tract is common in patients with stable COPD. The role of microbiota and host immune response to potential pathogens is not well studied. Microbiota composition disorders in respiratory tract are found in patients with COPD and associated with maladaptive changes in the immune system of the lungs and increased level of inflammation. This review investigates role of microbiota in the pathogenesis of COPD and its impact on the course of the disease. Some important issues such as pneumococcal vaccination and antimicrobial resistance of respiratory pathogens are also discussed.
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Affiliation(s)
| | | | | | - M.I. Zaslavskaya
- Privolzhskiy Research Medical University (Nizhny Novgorod, Russia)
| | - I.S. Dobrotina
- Privolzhskiy Research Medical University (Nizhny Novgorod, Russia)
| | - A.A. Tulichev
- Privolzhskiy Research Medical University (Nizhny Novgorod, Russia)
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3
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Zubair K, You C, Kwon G, Kang K. Two Faces of Macrophages: Training and Tolerance. Biomedicines 2021; 9:biomedicines9111596. [PMID: 34829825 PMCID: PMC8615871 DOI: 10.3390/biomedicines9111596] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Revised: 10/25/2021] [Accepted: 10/29/2021] [Indexed: 01/16/2023] Open
Abstract
Macrophages are present in almost all body tissues. They detect and quickly respond to “environmental signals” in the tissue. Macrophages have been associated with numerous beneficial roles, such as host defense, wound healing, and tissue regeneration; however, they have also been linked to the development of diverse illnesses, particularly cancers and autoimmune disorders. Complex signaling, epigenetic, and metabolic pathways drive macrophage training and tolerance. The induced intracellular program differs depending on the type of initial stimuli and the tissue microenvironment. Due to the essential roles of macrophages in homeostatic and their association with the pathogenesis of inflammatory diseases, recent studies have investigated the molecular mechanisms of macrophage training and tolerance. This review discusses the role of factors involved in macrophage training and tolerance, along with the current studies in human diseases.
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4
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Malapelle U, Pisapia P, Addeo A, Arrieta O, Bellosillo B, Cardona AF, Cristofanilli M, De Miguel-Perez D, Denninghoff V, Durán I, Jantus-Lewintre E, Nuzzo PV, O'Byrne K, Pauwels P, Pickering EM, Raez LE, Russo A, Serrano MJ, Gandara DR, Troncone G, Rolfo C. Liquid biopsy from research to clinical practice: focus on non-small cell lung cancer. Expert Rev Mol Diagn 2021; 21:1165-1178. [PMID: 34570988 DOI: 10.1080/14737159.2021.1985468] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
INTRODUCTION In the current era of personalized medicine, liquid biopsy has acquired a relevant importance in patient management of advanced stage non-small cell lung cancer (NSCLC). As a matter of fact, liquid biopsy may supplant the problem of inadequate tissue for molecular testing. The term 'liquid biopsy' refers to a number of different biological fluids, but is most clearly associated with plasma-related platforms. It must be taken into account that pre-analytical processing and the selection of the appropriate technology according to the clinical context may condition the results obtained. In addition, novel clinical applications beyond the evaluation of the molecular status of predictive biomarkers are currently under investigation. AREAS COVERED This review summarizes the available evidence on pre-analytical issues and different clinical applications of liquid biopsies in NSCLC patients. EXPERT OPINION Liquid biopsy should be considered not only as a valid alternative but as complementary to tissue-based molecular approaches. Careful attention should be paid to the optimization and standardization of all phases of liquid biopsy samples management in order to determine a significant improvement in either sensitivity or specificity, while significant reducing the number of 'false negative' or 'false positive' molecular results.
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Affiliation(s)
- Umberto Malapelle
- Department of Public Health, University of Naples Federico Ii, Naples, Italy
| | - Pasquale Pisapia
- Department of Public Health, University of Naples Federico Ii, Naples, Italy
| | - Alfredo Addeo
- Oncology Department, University Hospital Geneva, Geneva, Switzerland
| | - Oscar Arrieta
- Thoracic Oncology Unit, Instituto Nacional de Cancerología (INCan), México City, México
| | - Beatriz Bellosillo
- Department of Pathology, Hospital Del Mar, Barcelona, Spain.,Department of Pathology, Ciberonc, Madrid, Spain
| | - Andres F Cardona
- Department of Oncology, Clinical and Translational Oncology Group, Clínica Del Country, Bogotá, Colombia.,Department of Oncology, Foundation for Clinical and Applied Cancer Research (Ficmac), Bogotá, Colombia.,Molecular Oncology and Biology Systems Research Group (Fox-g/oncolgroup), Universidad el Bosque, Bogotá, Colombia
| | - Massimo Cristofanilli
- Division of Hematology and Oncology, Department of Medicine, Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Diego De Miguel-Perez
- GENyO, Centre for Genomics and Oncological Research, Pfizer-University of Granada-Andalusian Regional Government, Liquid Biopsy and Cancer Interception Group, Granada, Spain.,Marlene and Stewart Greenebaum Comprehensive Cancer Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Valeria Denninghoff
- Department of Pathology, University of Buenos Aires - National Council for Scientific and Technical Research (Conicet), Buenos Aires, Argentina
| | - Ignacio Durán
- Department of Oncology, Hospital Universitario Marques de Valdecilla, IDIVAL, Santander, Spain
| | - Eloísa Jantus-Lewintre
- Department of Pathology, Ciberonc, Madrid, Spain.,Molecular Oncology Laboratory, Fundación Para La Investigación Del Hospital General Universitario De Valencia, Valencia, Spain.,Mixed Unit TRIAL, (Príncipe Felipe Research Centre & Fundación Para La Investigación Del Hospital General Universitario De Valencia), Valencia, Spain.,Department of Biotechnology, Universitat Politècnica De València, Valencia, Spain
| | - Pier Vitale Nuzzo
- Department of Medical Oncology, The Lank Center for Genitourinary Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Ken O'Byrne
- Medical Oncology, Princess Alexandra Hospital, Queensland University of Technology, Brisbane City, Australia
| | - Patrick Pauwels
- Center for Oncological Research Antwerp (Core), Integrated Personalized & Precision Oncology Network (IPPON), University of Antwerp (Uantwerp), Wilrijk, Belgium.,Laboratory of Pathological Anatomy, Antwerp University Hospital (UZA), Edegem, Belgium
| | - Edward M Pickering
- Divison of Pulmonary and Critical Care Medicine, Section of Interventional Pulmonology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Luis E Raez
- Thoracic Oncology Program, Memorial Cancer Institute/Memorial Health Care System, Florida International University, Miami, FL, USA
| | - Alessandro Russo
- Department of Oncology, Medical Oncology Unit, A.O. Papardo, Messina, Italy
| | - Maria José Serrano
- GENyO, Centre for Genomics and Oncological Research, Pfizer-University of Granada-Andalusian Regional Government, Liquid Biopsy and Cancer Interception Group, Granada, Spain
| | - David R Gandara
- Department of Internal Medicine, UC Davis Comprehensive Cancer Center, Sacramento, CA, USA
| | - Giancarlo Troncone
- Department of Public Health, University of Naples Federico Ii, Naples, Italy
| | - Christian Rolfo
- Center for Thoracic Oncology, Tisch Cancer Institute, Mount Sinai Medical System & Icahn School of Medicine, New York, NY, USA
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Role of Toll-Like Receptor 2 in Regulation of T-Helper Immune Response in Chronic Obstructive Pulmonary Disease. Can Respir J 2021; 2021:5596095. [PMID: 34426754 PMCID: PMC8380179 DOI: 10.1155/2021/5596095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 06/29/2021] [Accepted: 08/10/2021] [Indexed: 11/23/2022] Open
Abstract
Objective According to modern views, the differences in the clinical course of chronic obstructive pulmonary disease (COPD) are associated with certain types of T-helper (Th) immune response. Recent data have shown that toll-like receptor 2 (TLR2) is involved in the development of Th immune response. However, TLR2-mediated regulation of Th subpopulation balance in COPD needs to be elucidated. The aim of our work is to determine the mechanisms of TLR2-mediated regulation of Th immune response in COPD of varying severity. Methods The study included 323 smokers/ex-smokers with stable COPD (GOLD I, GOLD II, and GOLD III) and 97 healthy nonsmokers (control group). Serum levels of Th1 (TNF-α and IFN-γ), Th2 (IL-4), Th17 (IL-6 and IL-17A), Treg (IL-10) cytokines, and the percentage of peripheral blood Th cells expressing TLR2 (CD4+CD282+) were assessed by flow cytometry. Serum concentrations of IL-21 (Th17) and TGF-β1 (Treg) were measured using the ELISA method. The predominant Th cytokine profile in serum was determined by calculating the ratios between levels of Th1 and Th17 cytokines. Spearman's correlation test was performed. Results Patients with COPD GOLD II and III with Th1 and Th17 cytokine profiles exhibited an increase in the percentage of CD4+CD282+ cells compared to the control group. In COPD GOLD I–III, positive correlations between CD4+CD282+ cell frequency and Th17 cytokine levels (IL-6, IL-17A, and IL-21) were found. In COPD GOLD I, IL-10 concentration was negatively correlated with the percentages of studied cells; in COPD GOLD II, a positive correlation between these parameters was noted. Conclusions Enhanced TLR2 expression on CD4+ cells shifts cytokine profile toward Th17 phenotype that plays a crucial role in COPD progression. The level of TLR2 expression on peripheral blood CD4+ cells may be considered as a biomarker for diagnosing and predicting the progression of COPD.
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Liquid Biopsy Analysis in Clinical Practice: Focus on Lung Cancer. JOURNAL OF MOLECULAR PATHOLOGY 2021. [DOI: 10.3390/jmp2030021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Lung cancer is the leading cause of cancer death worldwide. Despite the emergence of highly effective targeted therapies, up to 30% of advanced stage non-small cell lung cancer (NSCLC) patients do not undergo tissue molecular testing because of scarce tissue availability. Liquid biopsy, on the other hand, offers these patients a valuable opportunity to receive the best treatment options in a timely manner. Indeed, besides being much faster and less invasive than conventional tissue-based analysis, it can also yield specific information about the genetic make-up and evolution of patients’ tumors. However, several issues, including lack of standardized protocols for sample collection, processing, and interpretation, still need to be addressed before liquid biopsy can be fully incorporated into routine oncology practice. Here, we reviewed the most important challenges hindering the implementation of liquid biopsy in oncology practice, as well as the great advantages of this approach for the treatment of NSCLC patients.
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Chen Z, Xu SL, Ge LY, Zhu J, Zheng T, Zhu Z, Zhou L. Sialic acid-binding immunoglobulin-like lectin 9 as a potential therapeutic target for chronic obstructive pulmonary disease. Chin Med J (Engl) 2021; 134:757-764. [PMID: 33595976 PMCID: PMC8104259 DOI: 10.1097/cm9.0000000000001381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 12/13/2022] Open
Abstract
ABSTRACT Chronic obstructive pulmonary disease (COPD) has become the third-leading cause of death worldwide, which is a severe economic burden to the healthcare system. Chronic bronchitis is the most common condition that contributes to COPD, both locally and systemically. Neutrophilic inflammation predominates in the COPD airway wall and lumen. Logically, repression of neutrophilia is an essential fashion to COPD treatment. However, currently available anti-neutrophilic therapies provide little benefit in COPD patients and may have serious side effects. Thus, there is an urgent need to explore an effective and safe anti-neutrophilic approach that might delay progression of the disease. Sialic acid-binding immunoglobulin-like lectin (Siglec)-9 is a member of the Siglec cell surface immunoglobulin family. It is noteworthy that Siglec-9 is highly expressed on human neutrophils and monocytes. Ligation of Siglec-9 by chemical compounds or synthetic ligands induced apoptosis and autophagic-like cell death in human neutrophils. Furthermore, administration of antibody to Siglec-E, mouse functional ortholog of Siglec-9, restrained recruitment and activation of neutrophils in mouse models of airway inflammation in vivo. Given the critical role that neutrophils play in chronic bronchitis and emphysema, targeting Siglec-9 could be beneficial for the treatment of COPD, asthma, fibrosis, and related chronic inflammatory lung diseases.
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Affiliation(s)
- Zi Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Shuang-Lan Xu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Lin-Yang Ge
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
| | - Jin Zhu
- Epidemiological Department, Huadong Medical Institute of Biotechniques, Nanjing, Jiangsu 210002, China
| | - Tao Zheng
- Department of Pediatrics and Department of Molecular Microbiology and Immunology, Brown University Warren Alpert Medical School, Providence, RI 02912, USA
| | - Zhou Zhu
- Department of Pediatrics and Department of Molecular Microbiology and Immunology, Brown University Warren Alpert Medical School, Providence, RI 02912, USA
| | - Linfu Zhou
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital, Nanjing Medical University, Nanjing, Jiangsu 210029, China
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Serrano MJ, Garrido-Navas MC, Diaz Mochon JJ, Cristofanilli M, Gil-Bazo I, Pauwels P, Malapelle U, Russo A, Lorente JA, Ruiz-Rodriguez AJ, Paz-Ares LG, Vilar E, Raez LE, Cardona AF, Rolfo C. Precision Prevention and Cancer Interception: The New Challenges of Liquid Biopsy. Cancer Discov 2020; 10:1635-1644. [PMID: 33037026 DOI: 10.1158/2159-8290.cd-20-0466] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 06/22/2020] [Accepted: 08/05/2020] [Indexed: 11/16/2022]
Abstract
Despite major therapeutic progress, most advanced solid tumors are still incurable. Cancer interception is the active way to combat cancer onset, and development of this approach within high-risk populations seems a logical first step. Until now, strategies for the identification of high-risk subjects have been based on low-sensitivity and low-specificity assays. However, new liquid biopsy assays, "the Rosetta Stone of the new biomedicine era," with the ability to identify circulating biomarkers with unprecedented sensitivity, promise to revolutionize cancer management. This review focuses on novel liquid biopsy approaches and the applications to cancer interception. Cancer interception involves the identification of biomarkers associated with developing cancer, and includes genetic and epigenetic alterations, as well as circulating tumor cells and circulating epithelial cells in individuals at risk, and the implementation of therapeutic strategies to prevent the beginning of cancer and to stop its development. Large prospective studies are needed to confirm the potential role of liquid biopsy for early detection of precancer lesions and tumors.
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Affiliation(s)
- Maria Jose Serrano
- GENYO Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Granada, Spain. .,Bio-Health Research Institute (Instituto de Investigación Biosanitaria ibs. GRANADA), Hospital Universitario Virgen de las Nieves Granada, Department of Medical Oncology, University of Granada, Granada, Spain.,Department of Pathological Anatomy, Faculty of Medicine, Campus de Ciencias de la Salud, University of Granada, Granada, Spain
| | - Maria Carmen Garrido-Navas
- GENYO Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Granada, Spain
| | - Juan Jose Diaz Mochon
- GENYO Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Granada, Spain.,DestiNA Genomica S.L. Parque Tecnológico Ciencias de la Salud (PTS), Armilla, Granada, Spain.,Department of Medicinal and Organic Chemistry, School of Pharmacy, University of Granada, Granada, Spain
| | - Massimo Cristofanilli
- Department of Medicine, Division of Hematology and Oncology, Robert H. Lurie Comprehensive Cancer Center, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Ignacio Gil-Bazo
- Department of Oncology, Clínica Universidad de Navarra, Pamplona, Spain
| | - Patrick Pauwels
- Department of Pathology, University Hospital Antwerp, Belgium & Center for Oncological Research (CORE), Antwerp University, Belgium
| | - Umberto Malapelle
- Department of Public Health, University of Naples "Federico II," Naples, Italy
| | | | - Jose A Lorente
- GENYO Centre for Genomics and Oncological Research, Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Granada, Spain.,Laboratory of Genetic Identification, Department of Legal Medicine, University of Granada, Granada, Spain
| | - Antonio J Ruiz-Rodriguez
- Unit of gastroenterology and hepatology, University Hospital Clínico San Cecilio, Granada, Spain
| | - Luis G Paz-Ares
- Division of Medical Oncology, University Hospital 12 de Octubre, Madrid, Spain
| | - Eduardo Vilar
- Department of Clinical Cancer Prevention, Division of OVP, Cancer Prevention and Population Sciences, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Luis E Raez
- Memorial Cancer Institute, Memorial Health Care System, Florida International University, Miami, Florida
| | - Andres F Cardona
- Clinical and Translational Oncology Group, Clínica del Country, Bogotá, Colombia.,Foundation for Clinical and Applied Cancer Research -FICMAC, Bogotá, Colombia.,Molecular Oncology and Biology Systems Research Group (Fox-G), Universidad El Bosque, Bogotá, Colombia
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Sidletskaya K, Vitkina T, Denisenko Y. The Role of Toll-Like Receptors 2 and 4 in the Pathogenesis of Chronic Obstructive Pulmonary Disease. Int J Chron Obstruct Pulmon Dis 2020; 15:1481-1493. [PMID: 32606656 PMCID: PMC7320879 DOI: 10.2147/copd.s249131] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2020] [Accepted: 05/24/2020] [Indexed: 12/14/2022] Open
Abstract
Currently, chronic obstructive pulmonary disease (COPD) is one of the leading causes of morbidity and mortality worldwide. The determination of immune mechanisms of inflammation in the disease presents an important challenge for fundamental medical research. According to modern views, Toll-like receptors (TLRs), among which TLR2 and TLR4 play a key role, are one of the essential components of inflammatory process in COPD. This review focuses on following aspects: the role of TLR2 and TLR4 in the initiation of inflammatory process in COPD; the mechanisms of influence of various exogenous factors (cigarette smoke, suspended particulate matter, and bacteria) on the expression of TLR2 and TLR4; the contribution of these TLRs to the T-helper (Th) immune response development in COPD, in particular to the Th17 immune response, which contributes to the progression of the disease and therapeutic implications of TLR2 and TLR4 in COPD.
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Affiliation(s)
- Karolina Sidletskaya
- Vladivostok Branch of Federal State Budgetary Science Institution "Far Eastern Scientific Center of Physiology and Pathology of Respiration" - Institute of Medical Climatology and Rehabilitative Treatment, Vladivostok, Russia
| | - Tatyana Vitkina
- Vladivostok Branch of Federal State Budgetary Science Institution "Far Eastern Scientific Center of Physiology and Pathology of Respiration" - Institute of Medical Climatology and Rehabilitative Treatment, Vladivostok, Russia
| | - Yulia Denisenko
- Vladivostok Branch of Federal State Budgetary Science Institution "Far Eastern Scientific Center of Physiology and Pathology of Respiration" - Institute of Medical Climatology and Rehabilitative Treatment, Vladivostok, Russia
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