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

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

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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

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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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Related Experiment Video

Updated: Aug 15, 2025

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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Regulatory T-cells in asthma.

Hani Harb1, Talal A Chatila2

  • 1Institute for Medical Microbiology and Virology, University Hospital Dresden, Technical University Dresden, Germany.

Current Opinion in Allergy and Clinical Immunology
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Summary
This summary is machine-generated.

Regulatory T (Treg) cells maintain lung immune tolerance but can worsen asthma by becoming pathogenic. Understanding this dual role is key for developing new asthma therapies.

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Area of Science:

  • Immunology
  • Pulmonology
  • Cell Biology

Background:

  • Regulatory T (Treg) cells are crucial for maintaining immune tolerance and tissue homeostasis in the lung.
  • Their function is critical in directing immune responses during both steady-state conditions and inflammatory processes like asthma.

Approach:

  • This review synthesizes recent research on Treg cell function in the lung.
  • It examines their role in immune tolerance and their involvement in asthmatic inflammation.

Key Points:

  • Treg cells normally enforce immune tolerance in lung tissues.
  • In chronic asthma, lung Treg cells can adopt a pathogenic phenotype, exacerbating airway inflammation.
  • Notch4 upregulation in Treg cells amplifies detrimental T helper type 2, T helper type 17, and innate lymphoid cell type 2 responses.

Conclusions:

  • Treg cells exhibit a dual role in asthma, acting as both immune regulators and potential effectors of disease.
  • This duality has significant implications for the development of novel therapeutic strategies for asthma.