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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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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.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
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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: 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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Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

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Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
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Antiasthma Drugs: Leukotriene Modifiers01:19

Antiasthma Drugs: Leukotriene Modifiers

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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.
Leukotriene modifiers work through two distinct mechanisms:
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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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Innate lymphocyte cells in asthma phenotypes.

Leyla Pur Ozyigit1, Hideaki Morita2, Mubeccel Akdis2

  • 1Department of Allergy and Immunology, Koç University, School of Medicine, Istanbul, Turkey.

Clinical and Translational Allergy
|July 8, 2015
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Summary

Asthma is more complex than just T helper type 2 (TH2) cells. The innate immune system, particularly innate lymphoid cells, plays a crucial role in understanding diverse asthma phenotypes and mechanisms.

Keywords:
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Area of Science:

  • Immunology
  • Pulmonology
  • Allergy

Background:

  • T helper type 2 (TH2) cells were historically considered the primary drivers of asthma.
  • Exaggerated TH2 cell activity alone cannot account for the full spectrum of asthma.
  • Asthma presents as a heterogeneous syndrome with distinct phenotypes.

Purpose of the Study:

  • To explore the limitations of TH2-centric asthma models.
  • To highlight the role of the innate immune system in asthma pathogenesis.
  • To provide a framework for understanding and differentiating asthma phenotypes.

Main Methods:

  • Review of existing literature on asthma pathophysiology.
  • Analysis of recent discoveries in innate lymphoid cell function.
  • Comparison of different asthma phenotypes and their underlying mechanisms.

Main Results:

  • Asthma encompasses multiple phenotypes, including allergic, eosinophilic, virus-induced, obesity-related, and neutrophilic asthma.
  • Innate lymphoid cells (ILCs) are key players in rapid cytokine production and asthma pathogenesis.
  • The innate immune system offers new insights into asthma mechanisms.

Conclusions:

  • Asthma is a complex disease with diverse phenotypes beyond TH2-driven inflammation.
  • Innate immunity, particularly ILCs, is critical for understanding asthma heterogeneity.
  • Recognizing innate immune contributions advances asthma research and clinical differentiation.