Biochem Biophys Res Commun. 1992 May 15;184(3):1344-9.

Exposure to the chlorofluorocarbon substitute 2,2-dichloro-1,1,1- trifluoroethane and the anesthetic agent halothane is associated with transient protein adduct formation in the heart.

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Dept. of Pharmacology, Biocenter of the University, Basel, Switzerland.

Abstract

Hydrochlorofluorocarbons (HCFCs) that are structural analogues of the anesthetic agent halothane may follow a common pathway of bioactivation and formation of adducts to cellular targets of distinct tissues. Exposure of rats to a single dose of HCFC 123 (2,2-dichloro- 1,1,1-trifluoroethane) or its structural analogue halothane (2-bromo-2-chloro-1,1,1-trifluoroethane) in vivo resulted in the formation of one prominent trifluoroacetylated protein adduct (TFA-protein adduct) in the heart. In contrast, a variety of distinct TFA-protein adducts were formed in the liver and the kidney of the same animals. The TFA-protein adduct in the heart was processed rapidly; t1/2 of the intact TFA-protein adduct was less than 12 h.

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Exposure to the chlorofluorocarbon substitute 2,2-dichloro-1,1,1- trifluoroethane and the anesthetic agent halothane is associated with transient protein adduct formation in the heart.

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