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Related Concept Videos

Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
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Asthma: Pathogenesis and Management01:20

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Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
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Asthma-I: Introduction01:29

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Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
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Asthma is a chronic respiratory condition for which new therapeutic avenues, including anti-inflammatory drugs like mast cell stabilizers and anti-IgE treatments, continue to be developed.
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Asthma-III: Symptoms and Complications01:24

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Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
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Asthma-IV: Diagnostic and Management01:30

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The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
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Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
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T-cell responses in asthma exacerbations.

Naomi Bryant1, Lyndsey M Muehling1

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Annals of Allergy, Asthma & Immunology : Official Publication of the American College of Allergy, Asthma, & Immunology
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T cells, including CD4+, CD8+, and unconventional types, play diverse roles in allergic and nonallergic asthma pathogenesis. Understanding these T cell contributions is crucial for developing new asthma therapies beyond current TH2-targeted treatments.

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Area of Science:

  • Immunology
  • Pulmonology
  • Cellular Biology

Background:

  • Asthma is a complex chronic respiratory disease with diverse endotypes.
  • T cells are key immune cells implicated in both the development and regulation of asthma.
  • Existing research has primarily focused on CD4+ T helper cell subsets.

Purpose of the Study:

  • To review the multifaceted roles of various T cell populations in asthma.
  • To explore the contributions of CD4+, CD8+, and unconventional T cells in different asthma endotypes.
  • To highlight research gaps and future directions in T cell-mediated asthma pathogenesis.

Main Methods:

  • Comprehensive review of published literature on T cells in asthma.
  • Inclusion of recent peer-reviewed articles and contextual studies.
  • Synthesis of findings on T cell subsets in allergic and nonallergic asthma.

Main Results:

  • CD4+ TH2 cells are central to allergic asthma; TH1 and TH17 cells are linked to neutrophilic and steroid-resistant asthma.
  • CD8+ Tc2 cells are associated with allergic asthma.
  • Unconventional T cells (γδT, iNKT, MAIT) are emerging players, bridging innate and adaptive immunity, though data are limited.

Conclusions:

  • Asthma pathogenesis is driven by diverse and heterogeneous T cell responses.
  • Current asthma therapeutics primarily target TH2 pathways, necessitating broader therapeutic strategies.
  • Further research into all T cell types is vital for a comprehensive understanding and improved treatment of asthma.