Related Experiment Video
Updated: Jun 7, 2025
10:47
Isolation of Mouse Respiratory Epithelial Cells and Exposure to Experimental Cigarette Smoke at Air Liquid Interface
Published on: February 21, 2011
34.0K
Third-Hand Smoke Exacerbates H2O2-Driven Airway Responses in A549 Cells
Rengin Reis1, Kübra Kolci1,2, Yağmur Özhan2
1Acıbadem Mehmet Ali Aydınlar University Faculty of Pharmacy, Department of Toxicology, İstanbul, Türkiye.
Turkish Journal of Pharmaceutical Sciences
|November 21, 2024
Summary
Third-hand smoke (THS) causes respiratory toxicity by inducing oxidative stress in airway cells. This study reveals THS exacerbates hydrogen peroxide-induced oxidative damage, highlighting its role in respiratory disease progression.
Area of Science:
- Environmental Health
- Toxicology
- Cell Biology
Background:
- Third-hand smoke (THS) is residual tobacco smoke adhering to surfaces.
- THS re-emission poses health risks, particularly for individuals with respiratory conditions.
Purpose of the Study:
- To investigate the mechanisms of THS-induced respiratory toxicity.
- To evaluate THS's potential to accelerate oxidative stress in human airway epithelial cells.
Main Methods:
- Cytotoxicity assessed using MTT assay.
- Reactive oxygen species (ROS) measured via DCFDA fluorescence.
- Biomarkers including GSH, MDA, CAT, and IL-6 analyzed spectrophotometrically and via ELISA.
Main Results:
- THS (50% v/v) induced significant cytotoxicity and upregulated intracellular ROS in A549 cells.
- THS exposure increased MDA levels and depleted GSH, while increasing CAT activity and IL-6 levels.
- THS-induced oxidative stress was amplified by co-treatment with H2O2 and attenuated by N-acetylcysteine.
Conclusions:
- Oxidative stress induction is a key mechanism in THS-induced airway toxicity.
- THS may contribute to the progression of respiratory diseases through oxidative stress pathways.
