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L-Arg对肾性高血压心肌肥厚大鼠血管平滑肌核转录因子NF-κB和血管内皮生长因子表达的影响

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摘要 目的:探讨L-精氨酸(L-Arg)对肾性高血压心肌肥厚大鼠血管平滑肌核转录因子NF-κB和血管内皮生长因子(VEGF)表达的影响。方法:选用雄性Wistar大鼠30只,制作二肾一夹(2K1C)型肾血管型高血压大鼠模型。实验随机将造模4周后模型成功大鼠分成3组,每组10只,A组:假手术组;B组:模型组;C组:2K1C+L-Arg(200 mg/kg.d-1)组。分别用RT-PCR和Western Blot的方法检测NF-κB和VEGF在肾性高血压心肌肥厚大鼠血管平滑肌的mRNA和蛋白表达。结果:B组、C组中大鼠血管平滑肌NF-κB、VEGF的mRNA表达明显高于正常对照组(均P<0.001);并且B组大鼠血管平滑肌NF-κBmRNA表达与C组比较差异有统计学意义(P<0.001)。NF-κB、VEGF蛋白质在正常对照组、B组和C组中均有表达。B组和C组与正常组比较差异有统计学意义(均P<0.001)。血管平滑肌中NF-κB、VEGF蛋白质在B组表达与C组比较差异也有统计学意义(P<0.05)。结论:核转录因子NF-κB和VEGF在肾性高血压心肌肥厚大鼠血管平滑肌中高表达,可能共同参与了高血压心肌肥厚的形成。L-Arg可能通过抑制血管平滑肌中NF-κB和VEGF的蛋白表达能有效地治疗高血压及逆转心肌肥厚。
出处 《广西医科大学学报》 CAS 北大核心 2006年第5期727-729,共3页 Journal of Guangxi Medical University
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