Gene expression in rat striatum following carbon monoxide poisoning.

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Studies have shown strong enhancement of •OH production in rat striatum by severe CO poisoning with a blood carboxyhemoglobin (COHb) level > 70% due to 3000 ppm CO, but not less severe CO poisoning with a blood COHb level at approximately 50% due to 1000 ppm CO [4]. Interestingly, 5% O2 causes hypoxia comparable with that by 3000 ppm CO and produces much less •OH than 3000 ppm CO does [4]. In addition, cAMP production in parallel with •OH production [5] might contribute to •OH production [6]. It is likely that mechanisms other than hypoxia contribute to brain damage due to CO poisoning [7]. To search for the mechanisms, we examined the effects of 1000 ppm CO, 3000 ppm CO and 5% O2 on gene expression in rat striatum. 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