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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.
Critical processes in asthma pathophysiology include:
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T Cell Types and Functions01:24

T Cell Types and Functions

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When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

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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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Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs01:25

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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.
Mast cell stabilizers, such as cromolyn (also known as sodium cromoglycate) and nedocromil (Tilade), are effective drugs in asthma management. These stabilizers hinder histamine release by skillfully obstructing the activation of mast cells and other cellular entities. Notably, they navigate this task without...
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Asthma-I: Introduction01:29

Asthma-I: Introduction

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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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Antiasthma Drugs: Leukotriene Modifiers01:19

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Leukotriene modifiers, or cysteinyl leukotriene receptor antagonists, are medications used to manage chronic asthma. These agents target specific inflammatory mediators produced during arachidonic acid metabolism, an essential process in generating inflammation in the body.
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Related Experiment Video

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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 helper 2 cells in asthma.

James A Harker1, Clare M Lloyd1

  • 1National Heart and Lung Institute, Imperial College London , London, UK.

The Journal of Experimental Medicine
|May 10, 2023
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Summary
This summary is machine-generated.

T helper 2 (Th2) cells play complex roles in allergic asthma pathogenesis, acting as both harmful and helpful regulators. Understanding their functions is key to developing new biologic therapies for asthma.

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Area of Science:

  • Immunology
  • Allergy and Asthma Research

Background:

  • Allergic asthma is a prevalent immune-mediated disease driven by type 2 immune responses.
  • The role of T helper 2 (Th2) cells in asthma is complex, with new innate sources of type 2 cytokines emerging.
  • Alarmins are potent innate mediators of inflammation relevant to asthma.

Approach:

  • This review synthesizes current knowledge on Th2 cells in human asthma.
  • It examines Th2 cell functions, considering tissue location, disease stage, and severity.
  • The review explores the impact of biologics targeting type 2 immune pathways.

Key Points:

  • Th2 cells exhibit diverse pathogenic and regulatory functions in asthma.
  • Their roles are context-dependent, varying with location and disease characteristics.
  • Biologics targeting type 2 immunity offer insights into Th2 cell functions.

Conclusions:

  • Th2 cells remain critical in understanding asthma pathogenesis.
  • Further research may uncover underappreciated roles of Th2 cells in lung inflammation.
  • Targeting type 2 immunity with biologics is advancing asthma treatment.