Normobaric oxygen for cerebral ischemic injury

作者：Chen Chunhua; Cui Haimeng; Li Zihe; Wang Ruifeng; Zhou Changman^*

来源：Neural Regeneration Research, 2013, 8(31): 2885-2894.

DOI：10.3969/pssn.1673-5374.2013.31.001

• neural regeneration
• brain injury
• normobaric oxygen
• cerebral ischemia
• focal cerebral ischemia
• blood-brain barrier
• hypoxia-inducible factor-1 alpha
• grants-supported paper
• neuroregeneration

Oxygen inhalation has been shown to increase oxygen supply to tissues after cerebral ischemia/reperfusion injury, protecting injured neural cells. However, hyperbaric oxygen may aggravate oxidative stress. By contrast, normobaric oxygen has the rapid and non-invasive characteristics and may have therapeutic effects on ischemic/hypoxic disease. Rats inhaled normobaric oxygen (95% 02) for 6 consecutive days, and then a rat model of focal cerebral ischemia was established. Nissl and 2,3,5-triphenyltetrazolium chloride (TTC) staining revealed that normobaric oxygen pretreatment improved neurological deficits and reduced infarct volume. lmmunohistochemical staining and western blot assay revealed that the expression of hypoxia-inducible factor-1 alpha, Notch-1, vascular endothelial growth factor and erythropoietin were increased. Behavioral studies also verified that neurological deficit scores increased. The hypoxia-inducible factor inhibitor 2-methoxyestradiol treatment at 1 hour before administration of normobaric oxygen could suppress the protective effect of normobaric oxygen. Given these observations, normobaric oxygen pretreatment may alleviate cerebral ischemic injury via the hypoxia-inducible factor signal pathway.

• 出版日期2013-11
• 单位北京大学