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外源性血管内皮生长因子对大鼠脊髓神经元的神经营养作用 被引量:1

Neurotrophic effect of vascular endothelial growth factor on rat spinal cord neuron in vitro
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摘要 目的观察血管内皮生长因子(VEGF)对大鼠脊髓神经元的神经营养作用。方法体外培养SD大鼠脊髓神经元细胞,加入不同浓度的VEGF164(10、25、50、75、100μg/L),通过神经元细胞计数、噻唑蓝(MTT)比色法检测神经元细胞活性、免疫组织化学方法观察大鼠脊髓神经元VEGF以及其受体Flk-1/Flt-1表达情况,检测并测量微管相关蛋白(MAP)-2标记的神经轴突生长长度,用50mg/L BrdU标记神经元前体细胞,研究VEGF164对体养的大鼠脊髓神经元前体细胞的增殖性的影响。结果当培养液终质量浓度达到25μg/L时,受5’-溴脱氧尿嘧啶(BrdU)标记的神经元前体细胞阳性细胞数由36/1000增加到62/1000,神经元前体细胞轴突生长平均长度由0.021mm增加到0.037mm。SU1498可抑制VEGF的这一作用。结论VEGF164可能通过VEGFR2/flk-1受体途径介导,对大鼠脊髓神经元具有神经营养作用。 Objective To investigate direct neurotrophie effects of vascular endothelial growth factor (VEGF) on SD rat spinal cord neurons. Methods We employed primary cultures of embryonic rat spinal cord neurons, then administrated different concentration VEGF164 ( 10,25,50,75,100 μg/L) in culture medium, Using BrdU labeling (50 mg/L)as an index of neuronal precursors proliferation ,the light microscope, MTT assay and immunoehemistry were employed to measure and observe the change of rat spinal cord neuron in cell morphology, axonal growth, proliferation and expression of VEGF receptors. Results When VEGF concentrations in culture medium reached 25 μg/L, positive ceils labeling with Brdu increased from 36/1000 to 62/1000, neurite length significantly increased from 0. 021 mm to 0. 037 mm. VEGFR2/FLK-1 inhibitor SU1498 can reverse these effects. Conclusion Vascular endothelial growth factor (VEGF) might stimulates Neurogenesis in Vitro Through VEGFR2/Flk-1 Receptors.
出处 《中华实验外科杂志》 CAS CSCD 北大核心 2008年第8期981-983,共3页 Chinese Journal of Experimental Surgery
基金 山西省自然科学青年基金资助项目(20070083)
关键词 血管内皮生长因子 脊髓 神经元 VEGF Spinal cord Neuron
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