【摘 要】
：
目的:探讨1,25-二羟维生素D3[1,25-(OH) 2D3]对慢性哮喘模型小鼠肺组织α-平滑肌肌动蛋白(α-SMA)表达及气道重塑的影响.方法:卵白蛋白致敏激发建立慢性哮喘小鼠模型,将小鼠
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目的:探讨1,25-二羟维生素D3[1,25-(OH) 2D3]对慢性哮喘模型小鼠肺组织α-平滑肌肌动蛋白(α-SMA)表达及气道重塑的影响.方法:卵白蛋白致敏激发建立慢性哮喘小鼠模型,将小鼠随机分为对照组、哮喘组及VD组.HE染色及天狼星红染色观察各组气道结构及上皮下纤维化,并用计算机图像分析系统评价各组气道重塑；Western blot法及实时荧光定量PCR法检测各组的α-SMA表达.结果:(1)哮喘组出现炎性细胞浸润增多、上皮细胞脱落、上皮下纤维化及平滑肌细胞层增厚等气道重塑的结构改变,而1,25-(OH)2D3的干预可有效减轻上述病理改变；(2)VD组肺组织α-SMA的mRNA及蛋白表达水平均显著低于哮喘组,但仍高于对照组(P＜0.05).结论:1,25-(OH) 2D3能降低哮喘小鼠肺组织α-SMA的表达并有效抑制哮喘气道重塑.
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