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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 125 (1999), S. 174-181 
    ISSN: 1432-1335
    Keywords: Key words Glutathione S-conjugate ; Cysteine S-conjugate ; Nephrotoxicity ; Cysteine conjugate β-lyase ; Organ specific toxicity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Several halogenated alkenes are nephrotoxic in rodents. A mechanism for the organ-specific toxicity to the kidney for these compounds has been elucidated. The mechanism involves hepatic glutathione conjugation to dihaloalkenyl or 1,1-difluoroalkyl glutathione S-conjugates, which are cleaved by γ-glutamyltransferase and dipeptidases to cysteine S-conjugates. Haloalkene-derived cysteine S-conjugates are substrates for renal cysteine conjugate β-lyases, which cleave them to form reactive intermediates identified as thioketenes (from chloroalkene-derived S-conjugates) or thionoacyl halides (from 1,1-difluoroalkyl S-conjugates). Alternatively, cysteine S-conjugates may be N-acetylated to excretable mercapturic acids. The formation of reactive intermediates by cysteine-conjugate β-lyase may play a role in the target-organ toxicity and in the possible renal tumorigenicity of several chlorinated olefins widely used in many chemical processes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 33 (1994), S. 1920-1935 
    ISSN: 0570-0833
    Keywords: Toxicology ; Chlorine ; Environmental chemistry ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Industrial “chlorine chemistry” is accused of polluting the environment with its products and having adverse effects on health. The accusation has been followed by the demand that this ill-defined branch of chemistry be simply abolished, a demand which has been repeated vigorously now for years. It grew out of misgivings such as those summarized here: 1. A number of polychlorinated cyclic compounds are very stable and highly lipophilic so that they accumulate in the environment and affect mankind through the food chain. Prominent examples are chlorinated pesticides, biphenyls, dibenzodioxins, and dibenzofurans. 2. Many chlorinated compounds are toxic for man and animals. Their genotoxicity (mutagenicity and carcinogenicity) plays a role in risk assessment; more and more chlorinated organic compounds are being shown to be carcinogenic and classified accordingly.To date there are no comprehensive reviews of the toxicology of chlorinated organic compounds. The present treatise is the result of an attempt to analyze the situation systematically. It makes generalizations as to the kind and degree of toxicity of the most important classes of chlorinated organic compounds and elaborates recommendations for reduction and avoidance of risk during production, occupational handling, and general use.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
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