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-  2015 

分化抑制因子1基因对BMP-2促进兔椎间盘软骨终板细胞软骨特性基因表达的影响

DOI: doi:10.7507/1002-1892.20150330

Keywords: BMP-2, 分化抑制因子1, 椎间盘软骨终板细胞, 基因转染,

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Abstract:

目的探讨通过慢病毒干扰细胞分化抑制因子1(inhibitor of differentiation 1,Id1)基因表达,对BMP-2促进兔椎间盘软骨终板细胞软骨特异性基因Ⅱ型胶原、蛋白多糖表达的影响。 方法取新西兰大白兔椎间盘软骨终板组织分离培养软骨终板细胞,取第2代细胞进行实验。使用绿色荧光蛋白慢病毒、高表达Id1基因慢病毒及RNA干扰(RNA interference,RNAi)Id1基因慢病毒转染椎间盘软骨终板细胞,采用荧光显微镜、实时荧光定量PCR及Western blot法观察慢病毒转染情况以及对细胞Id1基因和蛋白表达的影响。使用上述慢病毒与BMP-2慢病毒共同转染软骨终板细胞,并设置BMP-2慢病毒转染对照,通过实时荧光定量PCR、ELISA法观察Id1基因表达差异对BMP-2促进椎间盘终板软骨细胞合成Ⅱ型胶原和蛋白多糖的影响。 结果慢病毒转染对细胞形态无明显影响,高表达Id1基因和RNAi Id1基因慢病毒能有效转染软骨终板细胞,并干扰内源性Id1基因的表达。BMP-2慢病毒和高表达Id1基因慢病毒共同转染软骨终板细胞后,Ⅱ型胶原、蛋白多糖基因表达和蛋白合成均显著高于BMP-2慢病毒、高表达Id1基因慢病毒单独转染,差异有统计学意义(P<0.05)。Id1基因表达下降后,软骨终板细胞Ⅱ型胶原、蛋白多糖合成明显下调(P<0.05)。 结论Id1基因表达上调能协同BMP-2促进软骨终板细胞Ⅱ型胶原、蛋白多糖表达

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