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Updated: Jul 25, 2026
10:47
Isolation of Mouse Respiratory Epithelial Cells and Exposure to Experimental Cigarette Smoke at Air Liquid Interface
Published on: February 21, 2011
Smoking increases carcinogenic polycyclic aromatic hydrocarbons in human lung tissue
R Goldman1, L Enewold, E Pellizzari
1Georgetown University Medical Center, Lombardi Cancer Center, Washington, DC 20007, USA.
Cancer Research
|August 28, 2001
Summary
Smokers have higher polycyclic aromatic hydrocarbons (PAHs) in lung tissue, reflecting exposure dose and potentially cancer risk. This study measured eleven PAHs in lung samples from smokers and non-smokers.
Area of Science:
- Environmental Health
- Toxicology
- Cancer Research
Background:
- Tobacco smoke is a primary source of human exposure to polycyclic aromatic hydrocarbons (PAHs).
- PAH concentrations in lung tissue can indicate an individual's exposure dose and may correlate with cancer risk.
- Understanding PAH levels in lung tissue is crucial for assessing health risks associated with environmental exposures.
Purpose of the Study:
- To quantify eleven specific PAHs in human lung tissue samples.
- To compare PAH concentrations between smokers and non-smokers.
- To investigate the relationship between smoking, PAH levels, and potential cancer risk factors.
Main Methods:
- Gas chromatography-mass spectrometry was used to measure eleven PAHs.
- Seventy lung tissue samples from cancer-free autopsy donors were analyzed.
- Serum cotinine levels were used to categorize individuals as smokers or non-smokers.
Main Results:
- Smokers exhibited significantly higher total PAH concentrations compared to non-smokers (P = 0.01).
- A dose-response relationship was observed between smoking intensity and PAH levels (P < 0.01).
- Concentrations of five PAHs, including benzo(a)pyrene, approximately doubled in smokers; carcinogenic PAHs showed a 3-fold increased risk.
Conclusions:
- PAH levels in lung tissue serve as a reliable biomarker for actual exposure dose to the target organ.
- Smoking is a significant determinant of PAH accumulation in lung tissue.
- Elevated levels of carcinogenic PAHs in smokers suggest an increased risk, warranting further investigation into lung cancer etiology.
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