首页> 外文期刊>Journal of Nanjing Medical University >Effects of Nerve Growth Factor on NMDA Receptor 1 and Neuronal Nitric Oxide Production after Spinal Cord Injury in Rats
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Effects of Nerve Growth Factor on NMDA Receptor 1 and Neuronal Nitric Oxide Production after Spinal Cord Injury in Rats

机译:神经生长因子对大鼠脊髓损伤后NMDA受体1和神经元一氧化氮产生的影响

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Objective: To explore the protective mechanisms of nerve growth factor (NGF) an spinal cord injury (SCI) and provide theoretical basis for its clinical application. Methods: The SCI of Wistar rats was done by Allen's weight dropping way by a 10 g X 2. 5 cm impact on the posterior of spinal cord T_8. NGF (3 g/L, 20 μl) or normal saline was injected through catheter into sub-arachnoid space 2, 4, 8, 12 and 24 h after SCI. The expression of N-methyl-D-asparate receptor 1 (NMDAR 1) and neuronal constitutive nitric oxide synthase (ncNOS) mRNA in rat spinal cord, was detected by in situ hybridization. Results: Abnormal expression of NMDAR 1 and ncNOS mRNA appeared in spinal ventral horn motorneuron in injured rats, as compared with that in control group. The expression of NMDAR 1 and ncNOS mRNA in NGF group was significantly lower than that in saline group (P<0. 01). Conclusion: NGF can protect spinal cord against injury in vivo. One of the mechanisms is that NGF can prohibit NMDAR 1 and nitric oxide (NO) production after spinal cord injury.
机译:目的:探讨神经生长因子(NGF)对脊髓损伤(SCI)的保护机制,为其临床应用提供理论依据。方法:Wistar大鼠的脊髓损伤(SCI)采用艾伦(Allen)减重法,对脊髓T_8的后方施加10 g X 2. 5 cm的冲击力。在SCI后2、4、8、12和24小时,通过导管将NGF(3 g / L,20μl)或生理盐水注入蛛网膜下腔。通过原位杂交检测N-甲基-D-天冬氨酸受体1(NMDAR 1)和神经元组成型一氧化氮合酶(ncNOS)mRNA在大鼠脊髓中的表达。结果:与对照组相比,损伤大鼠脊髓腹角运动神经元中NMDAR 1和ncNOS mRNA的表达异常。 NGF组NMDAR 1和ncNOS mRNA的表达明显低于生理盐水组(P <0。01)。结论:NGF可以保护脊髓免受体内损伤。机制之一是NGF可以抑制脊髓损伤后NMDAR 1和一氧化氮(NO)的产生。

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