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Updated: May 30, 2026
10:06
Cell Type-specific Gene Expression Profiling in the Mouse Liver
Published on: September 17, 2019
Identification of genes responsive to PFOS using gene expression profiling.
Wenyue Hu1, Paul D Jones, Trine Celius
1Department of Zoology, National Food Safety and Toxicology Center and Institute of Environmental Toxicology, Michigan State University, East Lansing, 224 National Food Safety and Toxicology Center, MI 48824-1311, USA.
Environmental Toxicology and Pharmacology
|July 26, 2011
Summary
Perfluorooctane sulfonic acid (PFOS) exposure alters gene expression in rats, primarily affecting fatty acid metabolism and hormone regulation pathways. This suggests a mechanism for PFOS toxicity linked to its structural similarity to fatty acids.
Area of Science:
- Environmental toxicology
- Molecular biology
- Genomics
Background:
- Perfluorooctane sulfonic acid (PFOS) is a persistent environmental contaminant found in wildlife and humans.
- The precise mechanism of PFOS toxicity remains largely unknown.
- Understanding gene expression changes is crucial for elucidating PFOS's biological effects.
Purpose of the Study:
- To identify specific genes and pathways affected by Perfluorooctane sulfonic acid (PFOS) exposure.
- To investigate the impact of PFOS on gene expression in both cell cultures and live animal models.
- To explore potential mechanisms of PFOS toxicity at the molecular level.
Main Methods:
- Utilized Affymetrix rat genome U34A genechip for gene expression analysis.
- Exposed rat hepatoma cells to PFOS (4-100μM) for 96 hours.
- Administered PFOS (5mg/kg/day) to Sprague-Dawley rats for 3 days and 3 weeks.
Main Results:
- PFOS significantly induced genes involved in fatty acid metabolism, cytochrome P450 activity, and hormone regulation.
- Consistent gene expression alterations were observed across in vitro and in vivo models, as well as short-term and long-term exposures.
- Peroxisomal fatty acid β-oxidation was identified as a major pathway affected by PFOS, likely due to structural similarities with endogenous fatty acids.
Conclusions:
- PFOS exposure leads to significant alterations in gene expression profiles related to lipid metabolism and hormonal pathways.
- The observed changes suggest that PFOS may disrupt normal cellular functions by interfering with fatty acid metabolism.
- Gene expression profiling provides valuable insights into the molecular mechanisms underlying PFOS toxicity.
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