Kwolek-Mirek M, Bednarska S, Bartosz G, Biliński T
Department of Biochemistry and Cell Biology, University of Rzeszów, ul. Cegielniana 12, 35-959 Rzeszów, Poland.
Cell Biol Toxicol. 2009 Aug;25(4):363-78. doi: 10.1007/s10565-008-9090-x. Epub 2008 Jun 18.
Exposure of yeast cells to allyl alcohol results in intracellular production of acrolein. The toxicity of so formed acrolein involves oxidative stress, as (1) strains deficient in antioxidant defense are hypersensitive to allyl alcohol, (2) exposure to allyl alcohol increases the level of thiobarbituric-acid-reactive substances and decreases glutathione level in the cells, (3) hypoxic and anoxic atmosphere and antioxidants protect against allyl alcohol toxicity, and (4) allyl alcohol causes activation of Yap1p. No increased formation of reactive oxygen species was detected in cells exposed to allyl alcohol, so oxidative stress is due to depletion of cellular thiols and thus alteration in the redox state of yeast cells.
将酵母细胞暴露于烯丙醇会导致细胞内产生丙烯醛。如此形成的丙烯醛的毒性涉及氧化应激,原因如下:(1) 抗氧化防御功能缺陷的菌株对烯丙醇高度敏感;(2) 暴露于烯丙醇会增加细胞中硫代巴比妥酸反应性物质的水平并降低谷胱甘肽水平;(3) 低氧和无氧环境以及抗氧化剂可防止烯丙醇毒性;(4) 烯丙醇会导致Yap1p激活。在暴露于烯丙醇的细胞中未检测到活性氧的形成增加,因此氧化应激是由于细胞内硫醇的消耗以及酵母细胞氧化还原状态的改变所致。