It is suggested that c fos, c jun and NGF mRNA expression in rat brain can be inducted by repeated +G Z exposures and they may poly an important role in the pathologic course or self protection effection of brain neurons damage induced by+G Z exposures.

• 结论：表明＋ GZ 重复暴露可诱导大鼠脑组织c?fos、c?jun 和NGF m RNA 的表达，提示它们的表达增加可能在＋ GZ 所致脑损伤中起病理或保护作用。