Related Experiment Video
Updated: May 6, 2026
08:33
A Method for Generating Pulmonary Neutrophilia Using Aerosolized Lipopolysaccharide
Published on: December 15, 2014
11.1K
Endotoxin-stimulated innate immunity: A contributing factor for asthma
1Allergic Disease Research Laboratory, Mayo Clinic, Rochester, MN, USA.
The Journal of Allergy and Clinical Immunology
|August 10, 2001
Summary
Airborne endotoxin exposure in infancy may prevent asthma by boosting T(H)1 response. However, later exposure worsens asthma by increasing inflammation and susceptibility to respiratory infections.
Area of Science:
- Immunology
- Environmental Health
- Pulmonology
Background:
- Airborne endotoxin exposure has dual effects on asthma: protective in infancy but detrimental later in life.
- Endotoxin triggers inflammatory pathways (IL-1, TNF-alpha, IL-8) and inhibits IgE responses via IL-12.
- Distinct granulocyte recruitment (neutrophils by endotoxin, eosinophils by IgE) leads to different tissue injury patterns.
Purpose of the Study:
- To elucidate the complex role of airborne endotoxin in asthma development and exacerbation.
- To differentiate endotoxin-induced inflammation from IgE-mediated allergic inflammation.
- To identify sources and health impacts of airborne endotoxin exposure.
Main Methods:
- Review of existing literature on endotoxin exposure, immune responses, and asthma.
- Analysis of signaling pathways involved in endotoxin and IgE-mediated inflammation.
- Identification of common environmental and occupational sources of airborne endotoxin.
Main Results:
- Infant exposure may confer protection via enhanced T(H)1 response and allergen tolerance.
- Adult exposure exacerbates asthma by increasing airway inflammation, rhinovirus susceptibility, and chronic bronchitis.
- Chronic exposure can lead to emphysema and irreversible airway obstruction.
Conclusions:
- Mitigating airborne endotoxin exposure is the primary management strategy for asthma.
- Further clinical research is needed to explore potential drug treatments for endotoxin-related respiratory issues.
More Related Videos
09:56Intra-tracheal Administration of Haemophilus influenzae in Mouse Models to Study Airway Inflammation
Published on: March 2, 2016
10.0K
10:39Advanced 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
7.0K
Related Concept Videos
01:20Asthma: Pathogenesis and Management
1.5K
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 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.
1.5K
01:25Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs
2.4K
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...
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...
2.4K
01:29Asthma-I: Introduction
3.6K
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...
3.6K
01:26Asthma-II: Pathophysiology and Classification
4.7K
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:
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:
4.7K
01:28Asthma I: Introduction
311
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...
311
01:25Inflammatory Bowel Disease III: Crohn's Disease
69
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
69