| 書目名稱 | Paraoxonase (PON1) in Health and Disease | | 副標題 | Basic and Clinical A | | 編輯 | Lucio G. Costa,Clement E. Furlong | | 視頻video | http://file.papertrans.cn/742/741193/741193.mp4 | | 圖書封面 |  | | 描述 | The paraoxonase or PON family of genes resides on human chromosome 7q2t-22 in the order PONt, PON3 and PON2. PONt was one of the early genes identified as an environmentally relevant gene, in that it is important in determining an individual‘s sensitivity or resistance to exposure from specific organophosphorus (OP) insecticides. Paraoxonase (PONt) is an A- esterase (i. e. , not inhibited by OP compounds) initially identified for its ability to catalytically hydrolyze paraoxon, the toxic metabolite (oxon form) of the insecticide parathion. Evidence accumulated in the past several years has established that this enzyme, which is present at variable levels in liver and serum of different individuals, is an important determinant of sensitivity to toxicity of specific organophosphorus compounds including chlorpyrifos oxon and diazoxon. Recent experiments have pointed out that it is the catalytic efficiency of PONt together with the levels of PONt that are important in determining the degree of resistance. Surprisingly, even though PONt has a higher catalytic efficiency than PONtQ)92 for paraoxon RJ92 hydrolysis, it does not provide significant in vivo protection against an exposure to | | 出版日期 | Book 2002 | | 關鍵詞 | cardiovascular; chlorpyrifos; insecticide; insecticides; organophosphorus; toxicology; ecotoxicology | | 版次 | 1 | | doi | https://doi.org/10.1007/978-1-4615-1027-7 | | isbn_softcover | 978-1-4613-5358-4 | | isbn_ebook | 978-1-4615-1027-7 | | copyright | Springer Science+Business Media New York 2002 |
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