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Related Concept Videos

Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
T Cell Types and Functions01:24

T Cell Types and Functions

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...
Asthma-II: Pathophysiology and Classification01:26

Asthma-II: Pathophysiology and Classification

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:
Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

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.
Asthma-I: Introduction01:29

Asthma-I: Introduction

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...
Hypersensitivity Reactions: Delayed Hypersensitivity Reactions01:29

Hypersensitivity Reactions: Delayed Hypersensitivity Reactions

Delayed-Type Hypersensitivity (DTH), or Type IV hypersensitivity, is a cell-mediated immune response. It occurs when T cells, rather than antibodies, mediate a reaction to specific antigens. It is characterized by a delayed onset (1-2 days) and involves the recruitment of macrophages to the inflammation site.The initiation of a DTH response begins with the sensitization of T cells. During this phase, which lasts at least 1-2 weeks, antigen-specific T cells are activated, clonally expanded, and...

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Related Experiment Video

Updated: Jun 4, 2026

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
10:39

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy

Published on: April 16, 2019

T(H)17 cells in asthma and inflammation.

Shean J Aujla1, John F Alcorn

  • 1Department of Pedaitrics, Children's Hospital of Pittsburgh of UPMC, Pitsburgh, PA 15224, USA.

Biochimica Et Biophysica Acta
|February 15, 2011
PubMed
Summary

Severe asthma involves T helper 17 (T(H)17) cells and interleukin-17 (IL-17), which may explain resistance to corticosteroids. Targeting this pathway offers potential new treatments for severe asthma.

Area of Science:

  • Immunology
  • Respiratory Medicine
  • Cell Biology

Background:

  • Asthma is a chronic airway disease with significant patient and healthcare burdens.
  • Current treatments are inadequate due to asthma's complex and heterogeneous nature.
  • Severe asthma is often resistant to standard corticosteroid therapy.

Purpose of the Study:

  • To review the role of T helper 17 (T(H)17) cells and IL-17 in severe asthma.
  • To explore the association between T(H)17 cells, neutrophilic inflammation, and corticosteroid resistance.

Main Methods:

  • Review of mouse and human studies.
  • Analysis of immunologic pathways in asthma.
  • Investigation of T(H)17 cell function and IL-17 cytokine signaling.

More Related Videos

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse
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In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

Published on: October 25, 2024

Isolation and Th17 Differentiation of Na&iuml;ve CD4 T Lymphocytes
12:59

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes

Published on: September 26, 2013

Related Experiment Videos

Last Updated: Jun 4, 2026

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy
10:39

Advanced Imaging of Lung Homing Human Lymphocytes in an Experimental In Vivo Model of Allergic Inflammation Based on Light-sheet Microscopy

Published on: April 16, 2019

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse
07:46

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

Published on: October 25, 2024

Isolation and Th17 Differentiation of Na&iuml;ve CD4 T Lymphocytes
12:59

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes

Published on: September 26, 2013

Main Results:

  • Severe asthma phenotypes exhibit neutrophilic inflammation.
  • T(H)17 cells and IL-17 are implicated in severe asthma pathogenesis.
  • These pathways are linked to corticosteroid resistance in severe asthma.

Conclusions:

  • T(H)17 cells and IL-17 play a significant role in severe asthma.
  • These findings suggest T(H)17/IL-17 as a potential therapeutic target.
  • Targeting this pathway may improve treatment outcomes for severe asthma patients.