Conjugation and bioactivation of chlorotrifluoroethylene

D. W. Bonhaus, A Jay Gandolfi

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Halogenated vinyl cysteine conjugates, which are potent, specific nephrotoxins, have been chemically synthesized from both chlorotrifluoroethylene (CTFE) and trichloroethylene (TCE) but have not been shown to be formed in a biological system. The vinyl cysteine conjugates are stable, but rapidly activated and degraded enzymatically with the release of pyruvate. Increased concentrations of pyruvate after incubation with CTFE may be an indirect index of the formation and bioactivation of a vinyl cysteine conjugate of CTFE. Incubation of CTFE with 10,000 x g rat liver and kidney supernatants resulted in 60 and 100 nmole/mg/hr increases in pyruvate concentration with concomitant depletion of endogenous glutathione. A renal cortex brush border preparation high in C-S lyase activity but deficient in cytosolic transferases did not generate pyruvate during incubation with CTFE. The evidence presented suggests that halogenated vinyl cysteine conjugates are formed in vitro by conjugation of the halogenated ethylene with glutathione which subsequently degrades to form the cysteine conjugate.

Original languageEnglish (US)
Pages (from-to)2399-2405
Number of pages7
JournalLife Sciences
Volume29
Issue number23
DOIs
StatePublished - Dec 7 1981

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Cysteine
Pyruvic Acid
Glutathione
Kidney
Trichloroethylene
Biological systems
Brushes
Microvilli
Transferases
Liver
Rats
chlorotrifluoroethylene

ASJC Scopus subject areas

  • Pharmacology

Cite this

Conjugation and bioactivation of chlorotrifluoroethylene. / Bonhaus, D. W.; Gandolfi, A Jay.

In: Life Sciences, Vol. 29, No. 23, 07.12.1981, p. 2399-2405.

Research output: Contribution to journalArticle

Bonhaus, D. W. ; Gandolfi, A Jay. / Conjugation and bioactivation of chlorotrifluoroethylene. In: Life Sciences. 1981 ; Vol. 29, No. 23. pp. 2399-2405.
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