RESUMEN
There is a close relationship between oxidative stress induced tissue damage and many diseases.As a multi-function oxidase,lipoxygenase can generate reactive oxygen species (ROS)by oxidatively metabolizing various endogenous and exogenous chemicals such as drugs and environmental pollutants.Lipoxygense can catalyze endogenous che mical reaction,such as arachidonic acid and pro-duce ROS.Lipoxygenase can be also activated in other ways to generate ROS by activating signal trans-duction.Moreover,some exogenous chemicals can be metabolized into highly reactive radical intermedi-ates by lipoxygenase,inducing ROS generation.The accumulation of intracellar ROS can damage intra-cellar redox balance and induce oxidative stress.That may be one of the possible toxic effect mecha-nis ms of che mical agents.