Altered neurochemical profile after traumatic brain injury: (1)H-MRS biomarkers of pathological mechanisms.

Altered neurochemical profile after traumatic brain injury: (1)H-MRS biomarkers of pathological mechanisms.
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DOI:
10.1038/jcbfm.2012.114
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发表时间:
2012-12
期刊:
Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism
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质子磁共振波谱(1H-MRS)检测的特定神经化学物质可作为脑内病理机制的生物标志物。我们使用高场在体内1H-MRS测量详细的神经化学档案后,实验性创伤性脑损伤(TBI)大鼠。我们的特点是神经化学的变化,在挫伤皮层和正常出现的病灶周围海马在一个时间过程中,从1小时到2周后受伤。我们发现大脑皮层20种神经化学物质中有19种发生了显著变化,海马体20种神经化学物质中有9种发生了显著变化。这些变化提供了TBI后细胞代谢状态改变的证据,提出了反映水肿、兴奋性毒性、神经元和神经胶质完整性、线粒体状态和生物能量学、氧化应激、炎症和细胞膜破坏的特定化合物。我们的研究结果支持1H-MRS在动物模型中用于监测TBI病理学的细胞机制的实用性,以及这种方法用于新疗法的临床前评价的潜力。
Specific neurochemicals measured with proton magnetic resonance spectroscopy (1H-MRS) may serve as biomarkers of pathological mechanism in the brain. We used high field in vivo 1H-MRS to measure a detailed neurochemical profile after experimental traumatic brain injury (TBI) in rats. We characterized neurochemical changes in the contused cortex and the normal-appearing perilesional hippocampus over a time course from 1 hour to 2 weeks after injury. We found significant changes in 19 out of 20 neurochemicals in the cortex, and 9 out of 20 neurochemicals in the hippocampus. These changes provide evidence of altered cellular metabolic status after TBI, with specific compounds proposed to reflect edema, excitotoxicity, neuronal and glial integrity, mitochondrial status and bioenergetics, oxidative stress, inflammation, and cell membrane disruption. Our results support the utility of 1H-MRS for monitoring cellular mechanisms of TBI pathology in animal models, and the potential of this approach for preclinical evaluation of novel therapies.
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