PuSH - Publication Server of Helmholtz Zentrum München: Long-term Effects of Commercial and Congeneric Polychlorinated Biphenyls on Ethane Production and malone Dialdehyde Levels Indicators of In-vivo lipid Peroxidation.

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Filser, J. ; Dogra, S. ; Cojocel, C. ; Greim, H. ; Regel, U. ; Desch, F. ; Robertson, L.W.

Long-term Effects of Commercial and Congeneric Polychlorinated Biphenyls on Ethane Production and malone Dialdehyde Levels Indicators of In-vivo lipid Peroxidation.

Arch. Toxicol. 62, 369-374 (1988)

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Ethane exhalation was increased in male Sprague-Dawley rats following a single intraperitoneal (IP) injection of Aroclor 1254 (500 mg/kg). In the first 2 weeks following Aroclor 1254 treatment, the increase in ethane exhalation was due to an inhibition of metabolism of endogenous ethane rather than to an increase in ethane production. In weeks 3 and 4 following Aroclor 1254 administration, metabolic clearance of ethane returned to and exceeded control levels, while ethane production increased to approximately twice the control rates (day 30). The HPLC determination of in situ hepatic malondialdehyde levels revealed a 2-fold increase in malondialdehyde content on day 30 following the Aroclor 1254 injection. Further, parallel increases in in situ malondialdehyde levels and ethane production rates were also found 30 days following a single IP injection of 3,3′,4,4′-tetrachlorobiphenyl, 2,3,4,4′,5-pentachlorobiphenyl and 2,2′,4,4′,5,5′-hexachlorobiphenyl (300 μmol/kg). These effects were not reflected in increased diene conjugation. Redox state of the liver was largely unaffected, as evidenced by the relative concentrations of reduced and oxidized NADPH. However, minor changes in reduced and oxidized glutathione were noted.

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