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Asthma I: Introduction

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...

Asthma-I: Introduction

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...

Asthma-II: Pathophysiology and Classification

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 Management

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.

Gene-Environment Interactions

Gene-Environment Interactions

Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs

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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Related Experiment Video

Updated: Jun 26, 2026

Identification and Characterization of Immunogenic RNA Species in HDM Allergens that Modulate Eosinophilic Lung Inflammation

Identification and Characterization of Immunogenic RNA Species in HDM Allergens that Modulate Eosinophilic Lung Inflammation

Published on: May 30, 2020

Gene-environment interactions in asthma.

Erika von Mutius¹

¹University Children's Hospital, Munich, Germany. Erika.von.Mutius@med.uni-muenchen.de

The Journal of Allergy and Clinical Immunology

|January 10, 2009

Summary

This summary is machine-generated.

Asthma development involves complex gene-environment interactions. Identifying genetic susceptibility can improve understanding of environmental impacts on asthma risk.

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Area of Science:

Environmental Health
Genetics
Epidemiology

Background:

Asthma's complexity arises from gene-environment interplay.
Many genes with small effects, not few strong ones, likely contribute to asthma.
Genetic predisposition to asthma can be influenced by environmental exposures.

Purpose of the Study:

To highlight the need for improved environmental exposure assessment tools.
To emphasize the significance of gene-environment interactions in asthma research.
To discuss how genetic analyses can refine environmental exposure effect estimations.

Main Methods:

Review of current literature on asthma genetics and environmental exposures.
Analysis of identified gene-environment interactions.
Discussion of technological advancements in genetic assessment versus environmental exposure assessment.

Main Results:

Numerous gene-environment interactions influencing asthma have been identified.
Genetic variation provides insights into biological mechanisms of environmental exposures.
Genetic analysis aids in identifying susceptible individuals to environmental hazards.

Conclusions:

Gene-environment interactions are crucial for understanding asthma etiology.
Improved environmental exposure assessment is needed for comprehensive asthma research.
Analyzing gene-environment interactions can reconcile conflicting study findings.