Xenobiotic Conjugation with Dicarboxylic Acids

Area of Science:

• Xenobiotic Metabolism
• Biochemistry
• Toxicology

Background:

• Existing knowledge of xenobiotic metabolism may be incomplete, with novel pathways occasionally discovered.
• Short-chain dicarboxylic acids have been anecdotally reported as conjugating agents for xenobiotics, leading to their urinary excretion.

Purpose of the Study:

• To review and consolidate existing literature on xenobiotic conjugation with dicarboxylic acids.
• To raise awareness of this under-recognized metabolic pathway.

Main Methods:

• A narrative review approach was employed.
• Extensive literature search of bibliographic databases and scrutiny of peer-reviewed articles.

Main Results:

• Xenobiotic conjugation with dicarboxylic acids has been observed in microorganisms, plants, invertebrates, and mammals.
• Despite its occurrence across multiple domains of life, reports of this conjugation are exceptionally rare.

Conclusions:

• Dicarboxylic acid conjugation primarily occurs with nitrogen centers, specifically primary or secondary amines, including those formed by N-dealkylation.
• Increased awareness may encourage further research into identifying and characterizing these dicarboxylic acid-xenobiotic conjugates.