scholarly journals The Role of Innate Lymphoid Cells in Chronic Respiratory Diseases

2021 ◽  
Vol 12 ◽  
Author(s):  
Amy T. Hsu ◽  
Timothy A. Gottschalk ◽  
Evelyn Tsantikos ◽  
Margaret L. Hibbs
Keyword(s):  
Immune System ◽  
Respiratory Diseases ◽  
Pulmonary Inflammation ◽  
Innate Lymphoid Cells ◽  
Lymphoid Cells ◽  
Chronic Obstructive ◽  
Chronic Respiratory Diseases ◽  
Chronic Lung Diseases ◽  
Pulmonary Immune System

The lung is a vital mucosal organ that is constantly exposed to the external environment, and as such, its defenses are continuously under threat. The pulmonary immune system has evolved to sense and respond to these danger signals while remaining silent to innocuous aeroantigens. The origin of the defense system is the respiratory epithelium, which responds rapidly to insults by the production of an array of mediators that initiate protection by directly killing microbes, activating tissue-resident immune cells and recruiting leukocytes from the blood. At the steady-state, the lung comprises a large collection of leukocytes, amongst which are specialized cells of lymphoid origin known as innate lymphoid cells (ILCs). ILCs are divided into three major helper-like subsets, ILC1, ILC2 and ILC3, which are considered the innate counterparts of type 1, 2 and 17 T helper cells, respectively, in addition to natural killer cells and lymphoid tissue inducer cells. Although ILCs represent a small fraction of the pulmonary immune system, they play an important role in early responses to pathogens and facilitate the acquisition of adaptive immunity. However, it is now also emerging that these cells are active participants in the development of chronic lung diseases. In this mini-review, we provide an update on our current understanding of the role of ILCs and their regulation in the lung. We summarise how these cells and their mediators initiate, sustain and potentially control pulmonary inflammation, and their contribution to the respiratory diseases chronic obstructive pulmonary disease (COPD) and asthma.

Interleukin-17A: A Potential Therapeutic Target in Chronic Lung Diseases

2019 ◽  
Vol 19 (7) ◽  
pp. 921-928 ◽  
Author(s):  
Sadiya Bi Shaikh ◽  
Ashwini Prabhu ◽  
Yashodhar Prabhakar Bhandary
Keyword(s):  
Respiratory Diseases ◽  
Inflammatory Cytokine ◽  
Inflammatory Responses ◽  
Chronic Obstructive ◽  
Interleukin 17 ◽  
Potential Therapeutic Target ◽  
Chronic Respiratory Diseases ◽  
Chronic Lung Diseases ◽  
Interleukin 17A ◽  
Insight Into

Background: Interleukin-17A (IL-17A) is a pro-inflammatory cytokine that has gained a lot of attention because of its involvement in respiratory diseases. Interleukin-17 cytokine family includes six members, out of which, IL-17A participates towards the immune responses in allergy and inflammation. It also modulates the progression of respiratory disorders. Objective: The present review is an insight into the involvement and contributions of the proinflammatory cytokine IL-17A in chronic respiratory diseases like Idiopathic Pulmonary Fibrosis (IPF), Chronic Obstructive Pulmonary Distress (COPD), asthma, pneumonia, obliterative bronchiolitis, lung cancer and many others. Conclusion: IL-17A is a major regulator of inflammatory responses. In all the mentioned diseases, IL- 17A plays a prime role in inducing the diseases, whereas the lack of this pro-inflammatory cytokine reduces the severity of respective respiratory diseases. Thereby, this review suggests IL-17A as an instrumental target in chronic respiratory diseases.

scholarly journals The Role of TOX in the Development of Innate Lymphoid Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Corey R. Seehus ◽  
Jonathan Kaye
Keyword(s):  
Bone Marrow ◽  
Immune System ◽  
Natural Killer ◽  
Cell Fate ◽  
Lymphoid Cell ◽  
Adaptive Immune System ◽  
Innate Lymphoid Cells ◽  
Lymphoid Cells ◽  
Innate Lymphoid Cell

TOX, an evolutionarily conserved member of the HMG-box family of proteins, is essential for the development of various cells of both the innate and adaptive immune system. TOX is required for the development of CD4+T lineage cells in the thymus, including natural killer T and T regulatory cells, as well as development of natural killer cells and fetal lymphoid tissue inducer cells, the latter required for lymph node organogenesis. Recently, we have identified a broader role for TOX in the innate immune system, demonstrating that this nuclear protein is required for generation of bone marrow progenitors that have potential to give rise to all innate lymphoid cells. Innate lymphoid cells, classified according to transcription factor expression and cytokine secretion profiles, derive from common lymphoid progenitors in the bone marrow and require Notch signals for their development. We discuss here the role of TOX in specifying CLP toward an innate lymphoid cell fate and hypothesize a possible role for TOX in regulating Notch gene targets during innate lymphoid cell development.

scholarly journals High Frequency of Viral Co-Detections in Acute Bronchiolitis

Viruses ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 990
Author(s):  
Hortense Petat ◽  
Vincent Gajdos ◽  
François Angoulvant ◽  
Pierre-Olivier Vidalain ◽  
Sandrine Corbet ◽  
...  
Keyword(s):  
Respiratory Diseases ◽  
Virus Detection ◽  
Public Health Issue ◽  
Chronic Obstructive ◽  
Acute Bronchiolitis ◽  
Obstructive Pulmonary Disease ◽  
Chronic Respiratory Diseases ◽  
Coronavirus Infection ◽  
Syncytial Virus

Over two years (2012–2014), 719 nasopharyngeal samples were collected from 6-week- to 12-month-old infants presenting at the emergency department with moderate to severe acute bronchiolitis. Viral testing was performed, and we found that 98% of samples were positive, including 90% for respiratory syncytial virus, 34% for human rhino virus, and 55% for viral co-detections, with a predominance of RSV/HRV co-infections (30%). Interestingly, we found that the risk of being infected by HRV is higher in the absence of RSV, suggesting interferences or exclusion mechanisms between these two viruses. Conversely, coronavirus infection had no impact on the likelihood of co-infection involving HRV and RSV. Bronchiolitis is the leading cause of hospitalizations in infants before 12 months of age, and many questions about its role in later chronic respiratory diseases (asthma and chronic obstructive pulmonary disease) exist. The role of virus detection and the burden of viral codetections need to be further explored, in order to understand the physiopathology of chronic respiratory diseases, a major public health issue.

scholarly journals Virome in the Lungs: The Role of Anelloviruses in Childhood Respiratory Diseases

2021 ◽  
Vol 9 (7) ◽  
pp. 1357
Author(s):  
Giulia Dodi ◽  
Marina Attanasi ◽  
Paola Di Filippo ◽  
Sabrina Di Pillo ◽  
Francesco Chiarelli
Keyword(s):  
Immune System ◽  
Respiratory Diseases ◽  
Epidemiological Data ◽  
Chronic Inflammatory Disease ◽  
Molecular Techniques ◽  
Chronic Respiratory Diseases ◽  
Constant Change ◽  
Inflammatory Processes ◽  
Health And Disease

More recently, increasing attention has been directed to exploring the function of the global virome in health and disease. Currently, by new molecular techniques, such as metagenomic DNA sequencing, the virome has been better unveiled. By investigating the human lung virome, we could provide novel insights into respiratory diseases. The virome, as a part of the microbiome, is characterized by a constant change in composition related to the type of diet, environment, and our genetic code, and other incalculable factors. The virome plays a substantial role in modulating human immune defenses and contributing to the inflammatory processes. Anelloviruses (AVs) are new components of the virome. AVs are already present during early life and reproduce without apparently causing harm to the host. The role of AVs is still unknown, but several reports have shown that AVs could activate the inflammasomes, intracellular multiprotein oligomers of the innate immune system, which show a crucial role in the host defense to several pathogens. In this narrative revision, we summarize the epidemiological data related to the possible link between microbial alterations and chronic respiratory diseases in children. Briefly, we also describe the characteristics of the most frequent viral family present in the lung virome, Anelloviridae. Furthermore, we discuss how AVs could modulate the immune system in children, affecting the development of chronic respiratory diseases, particularly asthma, the most common chronic inflammatory disease in childhood.

scholarly journals Role of specialized pro-resolving lipid mediators in pulmonary inflammation diseases: mechanisms and development

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Ailin Yang ◽  
Yanjun Wu ◽  
Ganggang Yu ◽  
Haoyan Wang
Keyword(s):  
Immune Cells ◽  
Immune Modulation ◽  
Respiratory Diseases ◽  
Preventive Measures ◽  
Pulmonary Inflammation ◽  
Lipid Mediators ◽  
Pulmonary Diseases ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease

AbstractInflammation is an essential mechanism of various diseases. The development and resolution of inflammation are complex immune-modulation processes which induce the involvement of various types of immune cells. Specialized pro-resolving lipid mediators (SPMs) have been demonstrated to be signaling molecules in inflammation. SPMs are involved in the pathophysiology of different diseases, especially respiratory diseases, including asthma, pneumonia, and chronic obstructive pulmonary disease. All of these diseases are related to the inflammatory response and its persistence. Therefore, a deeper understanding of the mechanisms and development of inflammation in respiratory disease, and the roles of the SPM family in the resolution process, might be useful in the quest for novel therapies and preventive measures for pulmonary diseases.

scholarly journals Microbiota: A Missing Link in The Pathogenesis of Chronic Lung Inflammatory Diseases

2021 ◽  
Vol 70 (1) ◽  
pp. 25-32
Author(s):  
AGNIESZKA MAGRYŚ
Keyword(s):  
Respiratory Diseases ◽  
Inflammatory Diseases ◽  
Chronic Obstructive ◽  
High Morbidity ◽  
Obstructive Pulmonary Disease ◽  
Chronic Respiratory Diseases ◽  
Chronic Pulmonary Diseases ◽  
Underlying Mechanisms

Chronic respiratory diseases account for high morbidity and mortality, with asthma, chronic obstructive pulmonary disease (COPD), and cystic fibrosis (CF) being the most prevalent globally. Even though the diseases increase in prevalence, the exact underlying mechanisms have still not been fully understood. Despite their differences in nature, pathophysiologies, and clinical phenotypes, a growing body of evidence indicates that the presence of lung microbiota can shape the pathogenic processes underlying chronic inflammation, typically observed in the course of the diseases. Therefore, the characterization of the lung microbiota may shed new light on the pathogenesis of these diseases. Specifically, in chronic respiratory tract diseases, the human microbiota may contribute to the disease’s development and severity. The present review explores the role of the microbiota in the area of chronic pulmonary diseases, especially COPD, asthma, and CF.

scholarly journals Infection-Associated Mechanisms of Neuro-Inflammation and Neuro-Immune Crosstalk in Chronic Respiratory Diseases

2021 ◽  
Vol 22 (11) ◽  
pp. 5699
Author(s):  
Belinda Camp ◽  
Sabine Stegemann-Koniszewski ◽  
Jens Schreiber
Keyword(s):  
Respiratory Diseases ◽  
Respiratory Infections ◽  
Airflow Obstruction ◽  
Microbial Colonization ◽  
Airflow Limitation ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Chronic Respiratory Diseases ◽  
Neuro Inflammation

Chronic obstructive airway diseases are characterized by airflow obstruction and airflow limitation as well as chronic airway inflammation. Especially bronchial asthma and chronic obstructive pulmonary disease (COPD) cause considerable morbidity and mortality worldwide, can be difficult to treat, and ultimately lack cures. While there are substantial knowledge gaps with respect to disease pathophysiology, our awareness of the role of neurological and neuro-immunological processes in the development of symptoms, the progression, and the outcome of these chronic obstructive respiratory diseases, is growing. Likewise, the role of pathogenic and colonizing microorganisms of the respiratory tract in the development and manifestation of asthma and COPD is increasingly appreciated. However, their role remains poorly understood with respect to the underlying mechanisms. Common bacteria and viruses causing respiratory infections and exacerbations of chronic obstructive respiratory diseases have also been implicated to affect the local neuro-immune crosstalk. In this review, we provide an overview of previously described neuro-immune interactions in asthma, COPD, and respiratory infections that support the hypothesis of a neuro-immunological component in the interplay between chronic obstructive respiratory diseases, respiratory infections, and respiratory microbial colonization.

scholarly journals Innate Lymphoid Cells: Roles In Tumour Genesis And Progression

2015 ◽  
Vol 16 (2) ◽  
pp. 85-91
Author(s):  
Ivan Jovanovic ◽  
Nevena Gajovic ◽  
Gordana Radosavljevic ◽  
Jelena Pantic ◽  
Nada Pejnovic ◽  
...  
Keyword(s):  
Metabolic Disease ◽  
Immune System ◽  
Innate Immune System ◽  
Cytokine Production ◽  
Tumour Progression ◽  
Innate Lymphoid Cells ◽  
Innate Immune ◽  
Lymphoid Cells ◽  
Tissue Remodelling

Abstract Innate lymphoid cells (ILCs) represent the most recently identified members of the innate immune system. These cells play important roles in inflammation, tissue remodelling and metabolic disease. ILCs can be subdivided into three major groups according to their cytokine production. The role of ILCs in tumourigenesis and tumour progression is not completely clarified. In this review, we discuss whether and how ILCs are involved in tumour genesis, growth and metastasis.

scholarly journals High Frequency of Viral Co-Detections in Acute Bronchiolitis

2021 ◽  
Author(s):  
Hortense PETAT ◽  
Vincent GAJDOS ◽  
Francois ANGOULVANT ◽  
Pierre-Olivier VIDALAIN ◽  
Sandrine CORBET ◽  
...  
Keyword(s):  
Respiratory Diseases ◽  
Virus Detection ◽  
Public Health Issue ◽  
Chronic Obstructive ◽  
Acute Bronchiolitis ◽  
Obstructive Pulmonary Disease ◽  
Chronic Respiratory Diseases ◽  
Coronavirus Infection ◽  
Syncytial Virus

Over two years (2012-2014), 719 nasopharyngeal samples were collected from 6 weeks to 12 months old infants presenting at emergency department with moderate to severe acute bronchiolitis. Viral testing was performed and we found 98% positive samples including 90% Respiratory Syncytial Virus, 34% Human Rhino Virus, and 55% viral co-detections with predominance of RSV/HRV co-infections (30%). Interestingly, we found that the risk of being infected by HRV is higher in the absence of RSV, suggesting interferences or exclusion mechanisms between these two viruses. Conversely, Coronavirus infection had no impact on the likelihood of co-infection involving HRV and RSV. Bronchiolitis is the leading cause of hospitalizations in infants before 12 months of age, and many questions about its role in the later chronic respiratory diseases (asthma and chronic obstructive pulmonary disease) do exist. Role of virus detection and burden of viral codetections need to be further explored, in order to understand the physiopathology of chronic respiratory diseases, a major public health issue.

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