Related Experiment Video
Updated: Jun 12, 2025

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
Epithelial Interleukin-1 Receptor-Like-1 Activation Is Contingent on Interleukin-33 Isoforms and Asthma-Related
Michael A Portelli1, Maria E Ketelaar2,3, Stewart Bates4
1Centre for Respiratory Research, National Institute for Health Research Nottingham Biomedical Research Centre, School of Medicine, Biodiscovery Institute, University of Nottingham, Nottingham, UK.
Genetic variants in the interleukin-33 receptor (IL1RL1) influence asthma risk. Specific IL-33 isoforms, particularly cleaved forms, activate IL1RL1 signaling, suggesting targeted therapies for asthma patients with risk haplotypes.
Area of Science:
- Immunology
- Genetics
- Respiratory Medicine
Background:
- The interleukin-33/interleukin-1 receptor-like-1 (IL-33/IL1RL1) pathway is crucial in asthma pathogenesis.
- Nonsynonymous genetic polymorphisms in IL1RL1 are linked to asthma susceptibility.
Purpose of the Study:
- To investigate how IL1RL1 genetic variants affect IL1RL1 signaling.
- To determine the impact of different IL-33 isoforms on IL1RL1 activation in asthma.
Main Methods:
- HEK293 cells expressing IL1RL1 with various haplotypes were stimulated with different IL-33 isoforms.
- Secreted embryonic alkaline phosphatase (SEAP) activity and IL-8 levels were measured.
- Primary human bronchial epithelial cells (HBECs) from different genotype carriers were also stimulated with IL-33.
Main Results:
- IL1RL1 risk haplotypes in HEK293 cells showed maximal IL-33-driven signaling.
- All IL-33 isoforms activated IL1RL1, with cleaved forms (IL3395-270, IL33106-270) having the most significant effect.
- These findings were replicated in primary HBECs, confirming the role of genetic variants in IL1RL1 signaling.
Conclusions:
- Asthma patients with IL1RL1 risk haplotypes may benefit from therapies targeting the IL-33/IL1RL1 pathway.
- Elevated levels of cleaved IL-33 isoforms in the lung microenvironment could enhance IL1RL1 pathway activation.
- Specific cleaved IL-33 isoforms (IL3395-270, IL33106-270) represent potential targets for asthma treatment.
More Related Videos
10:21Author Spotlight: Exploring the Role of Inflammation in the Co-occurrence of Primary Sjogren's Syndrome and Lung Adenocarcinoma
Published on: September 20, 2024
08:16An IL-8 Transiently Transgenized Mouse Model for the In Vivo Long-term Monitoring of Inflammatory Responses
Published on: July 7, 2017
Related Concept Videos
Asthma-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:
T Cell Types and Functions
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Asthma: 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.
Asthma-I: Introduction
Drugs Used in Lower Respiratory Disorders: Overview
Bronchodilators, the first step of respiration enhancement, come in various forms, each with its own mechanism...
Receptor Downregulation in MVBs
The EGFR can initiate signaling pathways that lead to cell proliferation, migration, and differentiation. Overexpression of EGFR stimulates cells to proliferate. Excessive EGFR...