Objective:

To investigate the relationship between elevated PFAS concentrations in human blood and changes in specific lipid species.

Key Findings:

• 25 lipid species differed significantly between exposure levels, with 24 showing higher abundance in individuals with elevated Σ7 PFAS levels.
• Triglycerides and phosphatidylethanolamines accounted for over 60% of the elevated lipids in the higher-exposure group.
• PFNA, PFOA, and PFDA showed numerous positive correlations with triglycerides and sphingomyelins.

Interpretation:

PFAS exposure may influence lipid metabolism, particularly affecting triglycerides and phosphatidylethanolamines, which are crucial for cellular membrane composition and energy storage.

Limitations:

• Differences in age, sex, and occupational factors could affect lipid profiles.
• Further studies are needed to clarify the biological mechanisms behind the observed associations.

Conclusion:

Future studies should integrate PFAS and lipidomic analyses to better understand the biological mechanisms altered by PFAS exposure.