Transcriptome sequencing reveals prenatal PFOS exposure on liver disorders

Area of Science:

• Environmental Toxicology
• Developmental Biology
• Molecular Toxicology

Background:

• Perfluorooctane sulfonate (PFOS) is a widespread environmental contaminant with known hepatic toxicity and potential carcinogenicity.
• Prenatal exposure to environmental toxicants is a significant concern due to potential long-lasting effects on development.
• PFOS contamination in maternal and cord blood highlights the risk to fetal development.

Purpose of the Study:

• To investigate the hepatotoxic and hepatocarcinogenic effects of prenatal PFOS exposure in the fetus.
• To elucidate the molecular mechanisms underlying PFOS-induced liver damage during embryonic development.

Main Methods:

• Transcriptome sequencing was employed to analyze gene expression changes in fetal liver.
• Bioinformatics analysis was used to identify affected biological pathways and signaling cascades.
• Assays were performed to measure hepatic transaminase activity in offspring.

Main Results:

• Prenatal PFOS exposure activated fatty acid and lipid synthesis/metabolism pathways, causing fetal liver damage and developmental interference.
• Cancer-promoting signaling pathways (Wnt/β-catenin, Rac, TGF-β) were activated in the fetal liver.
• Hepatic transaminase activities (AST, ALT) were induced in mouse offspring following prenatal PFOS exposure.

Conclusions:

• Prenatal PFOS exposure induces significant hepatotoxicity and interferes with normal liver development in the fetus.
• Activated oncogenic pathways suggest a potential for long-term carcinogenic risk.
• This study provides the first evidence that prenatal PFOS exposure may predispose offspring to long-term liver disorders.