Nerve growth factor treatment prevents the increase in superoxide produced by epidermal growth factor in PC12 cells

被引:57
作者
Mills, EM
Takeda, K
Yu, ZX
Ferrans, V
Katagiri, Y
Jiang, H
Lavigne, MC
Leto, TL
Guroff, G
机构
[1] NICHD, Growth Factors Sect, NIH, Bethesda, MD 20892 USA
[2] NHLBI, Pathol Sect, Bethesda, MD 20892 USA
[3] NIAID, Host Def Lab, NIH, Bethesda, MD 20892 USA
关键词
D O I
10.1074/jbc.273.35.22165
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Stimulation of pheochromocytoma (PC12) cells with the mitogen epidermal growth factor (EGF) produced a rapid and robust accumulation of intracellular reactive oxygen species (ROS), an accumulation which, in other systems, has been shown to be essential for mitogenesis, Brief pretreatment of the cells with nerve growth factor (NGF) suppressed the EGF-mediated ROS increase. EGF failed to produce elevations in ROS in a PC12 variant stably expressing a dominant-negative p2(ras) construct (PC12-N17) or in cells pretreated with the MEK inhibitor PD098059, NGF failed to suppress the increase in ROS in the PC12 variant nnr5, which lacks p140(trk) receptors, The suppression of the increase in ROS by NGF was restored in nnr5 cells stably expressing p140(trk) (nnr5-trk), but NGF failed to prevent the increase in ROS in nnr cells expressing mutant p140(trk) receptors that lack binding sites for Shc and phospholipase C gamma, Among several inhibitors of superoxide-generating enzymes, only the lipoxygenase inhibitor, nordihydroguaiaretic acid reduced EGF-mediated ROS accumulation. The inhibitory action of NGF on ROS production was mimicked by the nitric oxide donor, sodium nitroprusside, and was blocked by an inhibitor of nitric-oxide synthetase, L-nitroarginine methyl ester, These results suggest a novel mechanism for the rapid interruption of mitogenic signaling by the neurotrophin NGF.
引用
收藏
页码:22165 / 22168
页数:4
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