Related Experiment Video
Updated: Sep 9, 2025
Noninvasive Sampling of Mucosal Lining Fluid for the Quantification of In Vivo Upper Airway Immune-mediator Levels
Published on: August 7, 2017
Exploring the causal role of plasma metabolites in pediatric asthma: a Mendelian randomization study
Shaojie Ma1, Wenjuan Hu1, Yingwei Bi1
1Department of Pediatrics, Civil Aviation General Hospital (Peking University Civil Aviation School of Clinical Medicine), Beijing, China.
Insights
This study identified ten plasma metabolites associated with pediatric asthma (PA). Key findings highlight 20:4n6 and G/C16 as potential biomarkers for early PA detection and management.
Area of Science:
- Metabolomics
- Genetics
- Pediatric Respiratory Medicine
Background:
- Pediatric asthma (PA) is a widespread chronic respiratory condition in children.
- Understanding plasma metabolites is crucial for elucidating PA's molecular pathology and developing new treatments.
Purpose of the Study:
- To investigate the causal relationships between plasma metabolites and pediatric asthma using genetic data.
- To identify potential plasma metabolite biomarkers for PA diagnosis and management.
Main Methods:
- Utilized Genome-Wide Association Studies (GWAS) data from the IEU-OpenGWAS project, analyzing 1400 plasma metabolites.
- Employed the inverse-variance weighting (IVW) method for causal inference, with stringent criteria for instrumental variable selection (p < 5x10-8) and Bonferroni correction (p < 3.57x10-5).
- Performed reverse Mendelian randomization analysis to validate findings.
Main Results:
- Identified 91 plasma metabolites associated with PA, with ten showing statistically significant links.
- Highlighted 20:4n6 (OR = 1.062) and G/C16 (OR = 0.886) as significant exposure factors for PA.
Conclusions:
- Ten plasma metabolites are significantly associated with pediatric asthma incidence.
- Elevated 20:4n6 levels and altered G/C16 may serve as valuable biomarkers for early PA detection and therapeutic strategies.
Background:
Pediatric asthma (PA) is the prevailing chronic respiratory ailment in childhood. A better understanding of plasma metabolites is the goal for elucidating the molecular pathological mechanisms of PA and investigating novel therapeutic approaches.
Methods:
Data for PA from Genome-Wide Association Studies (GWAS) was derived from the IEU-OpenGWAS project, featuring a collection of 1400 plasma metabolites. The inverse-variance weighting (IVW) method assessed causal relationships between plasma metabolites and PA, with measures taken to mitigate horizontal pleiotropy and heterogeneity. To select instrumental variables, a genome-wide significance threshold (p < 5 × 10-8) was applied to ensure robust genetic instruments. A Bonferroni correction controlled for multiple testing, with statistical significance defined as p < 3.57 × 10-5) (0.05/1400). To further substantiate outcomes, a reverse Mendelian randomization analysis was conducted.
Results:
Research found 91 plasma metabolites linked to PA, ten of which showed significant associations. Of note, 20:4n6 levels (IVW: OR (95% CI) = 1.062 (1.030 to 1.094) and G/C16 (IVW: OR (95% CI) = 0.886 (0.832 to 0.943) were identified as pivotal exposure factors for PA.
Conclusions:
This study highlights 10 plasma metabolites that may have significant associations with PA incidence, with 20:4n6 levels and G/C16 potentially serving as valuable biomarkers for the early detection and management of PA.
Related Concept Videos
01:19Antiasthma Drugs: Leukotriene Modifiers
Leukotriene modifiers work through two distinct mechanisms:
01:20Asthma: Pathogenesis and Management
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.
01:26Asthma-II: Pathophysiology and Classification
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:
01:25Antiasthma Drugs: Mast Cell Stabilizers and Anti-IgE Drugs
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...
01:29Asthma-I: Introduction
01:28Criteria for Causality: Bradford Hill Criteria - II