Wnt信号通路对vaspin诱导大鼠骨髓间充质干细胞成骨分化的影响

被引:8
作者
陈坤 [1 ]
高飞 [2 ]
机构
[1] 山西医科大学第一临床医学院
[2] 山西医科大学第一临床医学院内分泌科
关键词
骨髓间充质干细胞; 成骨分化; 脂肪组织特异性丝氨酸蛋白酶抑制剂; Wnt/胞内β-连锁蛋白通路; 核心蛋白结合因子2; 成骨细胞特异性转录因子Osterix;
D O I
10.13429/j.cnki.cjcr.2015.11.002
中图分类号
R329.2 [人体细胞学];
学科分类号
100107 [人体解剖与组织胚胎学(人体解剖学、组织与胚胎学)];
摘要
目的研究Wnt/胞内β-连锁蛋白(β-catenin)信号通路对脂肪组织特异性丝氨酸蛋白酶抑制剂(vaspin)介导大鼠骨髓间充质干细胞(BMSCs)成骨分化的影响。方法体外培养4周龄雄性SD大鼠的BMSCs,分为4组:对照组,实验1、2、3组,分别加入成骨诱导液、含50 ng/ml、100 ng/ml vaspin的成骨诱导液及含100 ng/ml vaspin成骨诱导液+Dickkopf1(DKK1,Wnt/β-catenin信号通路特异性阻断剂),于成骨诱导第7天酶标仪检测碱性磷酸酶(ALP)活性,逆转录-聚合酶链反应(RT-PCR)检测成骨分化相关基因:ALP、核心蛋白结合因子2(RUNX2)、成骨细胞特异性转录因子Osterix(OSX)mRNA及β-catenin的表达水平。结果体外培养BMSCs,并加入不同浓度vaspin诱导后,实验1、2组ALP活性较对照组增加,并呈vaspin浓度依赖性(P均<0.05);成骨分化基因ALP、RUNX2、OSX mRNA表达水平增加,亦呈vaspin浓度依赖性(P均<0.05);β-catenin表达水平仅在加入100 ng/ml vaspin时升高(P<0.05);加入DKK1后(实验3组),ALP活性及成骨分化各基因表达水平较实验2组(100 ng/ml vaspin)显著下降(P均<0.05),β-catenin表达水平也显著下降(P<0.05)。结论 Vaspin可通过Wnt/β-catenin通路促进大鼠BMSCs成骨分化。
引用
收藏
页码:1415 / 1417+1421 +1421
页数:4
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