Chlordecone metabolism in the pig

Area of Science:

• Environmental Toxicology
• Pharmacokinetics
• Comparative Metabolism

Background:

• Chlordecone (CD) is an organochlorine pesticide with known toxicity.
• Biotransformation of CD to chlordecone alcohol (CDOH) varies significantly across species.
• Identifying suitable animal models is crucial for understanding CD metabolism and toxicity.

Purpose of the Study:

• To investigate the biotransformation and conjugation of chlordecone (CD) in pigs.
• To evaluate pigs as a potential animal model for human CD metabolism.
• To compare CD metabolism pathways in pigs with those observed in humans.

Main Methods:

• Pigs were administered chlordecone (CD) via intraperitoneal injection.
• Plasma, gallbladder bile, hepatic bile, liver, and feces were collected.
• Gas chromatography was used to analyze CD and its metabolites, including CDOH and conjugated forms.

Main Results:

• Chlordecone alcohol (CDOH) was detected in pig bile and feces.
• CDOH in bile was highly conjugated (up to 85%), while in feces, conjugation was lower (15%).
• Conjugated CD constituted up to 20% in plasma and bile, and less than 3% in feces.

Conclusions:

• Pigs exhibit both reduction and conjugation pathways for chlordecone (CD) metabolism.
• The metabolic profile of CD in pigs closely resembles that observed in humans.
• Pigs represent a relevant animal model for studying chlordecone biotransformation and detoxification.