Disposition and metabolomic effects of 2,2',5,5'-tetrachlorobiphenyl in female rats following intraperitoneal exposure.

Abstract

The disposition and toxicity of lower chlorinated PCBs (LC-PCBs) with less than five chlorine substituents have received little attention. This study characterizes the distribution and metabolomic effects of PCB 52, an LC-PCB found in indoor and outdoor air, three weeks after intraperitoneal exposure of female Sprague Dawley rats to 0, 1, 10, or 100 mg/kg BW. PCB 52 exposure did not affect overall body weight. Gas chromatography-tandem mass spectrometry (GC-MS/MS) analysis identified PCB 52 in all tissues investigated. Hydroxylated, sulfated, and methylated PCB metabolites, identified using GC-MS/MS and nontarget liquid chromatography-high resolution mass spectrometry (Nt-LCMS), were primarily found in the serum and liver of rats exposed to 100 mg/kg BW. Metabolomic analysis revealed minor effects on L-cysteine, glycine, cytosine, sphingosine, thymine, linoleic acid, orotic acid, L-histidine, and erythrose serum levels. Thus, the metabolism of PCB 52 and its effects on the metabolome must be considered in toxicity studies.

• Authors: Amanda Bullert, Xueshu Li, Zhang Chunyun, Kendra Lee, Casey F Pulliam, Brianna S Cagle, Jonathan A Doorn, Aloysius J Klingelhutz, Larry W Robertson, Hans-Joachim Lehmler
• Journal: Environmental toxicology and pharmacology (Environ Toxicol Pharmacol) Vol. 102 Pg. 104245 (Sep 2023) ISSN: 1872-7077 [Electronic] Netherlands
• PMID: 37572994 (Publication Type: Journal Article)
• Copyright: Copyright © 2023 Elsevier B.V. All rights reserved.

Chemical References

• 2,5,2',5'-tetrachlorobiphenyl
• Polychlorinated Biphenyls

Topics

• Rats
• Female
• Animals
• Polychlorinated Biphenyls (toxicity, metabolism)
• Rats, Sprague-Dawley
• Tandem Mass Spectrometry
• Gas Chromatography-Mass Spectrometry