益骨汤对骨质疏松大鼠骨密度及BMP-2信号通路的影响
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浙江中医药大学第三临床医学院,浙江 杭州 310053

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R285.5

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* 基金项目: 浙江省自然科学基金重点项目(LZ15H270001) 收稿日期: 2016 - 09 - 30 作者简介: 李威(1990-),男,河南安阳人,在读硕士研究生,研究方向:中医骨伤科基础与临床。△通信作者:姚新苗,E-mail:fengxieqing10yang@163.com


Effects of YiGu Recipe on the Expression of BMP-2 Signaling Pathways in Rats with Osteoporosis
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College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou 310053, China

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    摘要:

    目的 研究益骨汤对骨质疏松大鼠BMP-2信号通路上BMP-2(Bone morphogenetic protein-2)、Smads、Runx2(Runt-related transcription factor 2)、OSX(Osterix)、Noggin基因转录及蛋白表达的影响,探究益骨汤防治骨质疏松症作用机制。方法 采用去除大鼠卵巢方法,建立骨质疏松症模型。分空白组、模型组、补佳乐组、益骨汤组、Noggin反义寡核苷酸组。以实时定量PCR检测BMP-2通路基因转录,WesternBlot法检测BMP-2通路蛋白表达。结果 ①模型组骨密度值明显低于空白组(P<0.01),益骨汤组、补佳乐组、Noggin反义寡核苷酸组骨密度值明显高于模型组(P<0.01)。②益骨汤组、补佳乐组、Noggin反义寡核苷酸组大鼠BMP-2、Smads、Runx2、OSXmRNA表达明显高于模型组(P<0.05);而益骨汤组Noggin表达明显低于模型组(P<0.05)。③益骨汤组、补佳乐组、Noggin反义寡核苷酸组大鼠BMP-2、Smads、Runx2、OSX蛋白条带明显深于模型组,而益骨汤组Noggin蛋白条带明显浅于模型组。结论 益骨汤防治骨质疏松症机制与上调BMP-2、Smads、Runx2、OSX表达,同时抑制Noggin过度表达以及增加骨密度有关。推测BMPs抑制剂Noggin可能是新的抗骨质疏松靶点。

    Abstract:

    Objective To study the effects of YiGu Recipe on the mRNA transcription and protein expression of BMP-2(Bone morphogenetic protein-2), Smads, Runx2(Runt-related transcription factor 2), OSX(Osterix), Noggin on BMP-2 signaling pathways in rats with osteoporosis, analyze the mechanism of Yigu Recipe in the prevention and treatment of osteoporosis. Methods The osteoporosis rats model was built by the ovariectomy. All rats were divided into normal control, blank model, progynova, YiGu Recipe, anti-Noggin group. RT-PCR and WesternBlotting methods was applied to measure the mRNA and protein expression of BMP-2, Smads, Runx2, OSX, Noggin mRNA in bone homogenate. Results First, the BMD(Bone mineral density) of the model group significantly decreased compared with the blank group(P<0.01), the BMD significantly increased compared with the model group(P<0.01). Second, the expression of BMP-2、Smads、Runx2、OSX mRNA significantly increased compared with the model group(P<0.05), the expression of Noggin mRNA significantly decreased compared with the model group(P<0.05). At last, the expression of BMP-2, Smads, Runx2, OSX protein significantly increased compared with the model group, the expression of Noggin protein significantly decreased compared with the model group. Conclusion The mechanism of Yigu Recipe in the prevention and treatment of osteoporosis was increase the BMD, inhibiting the expression of Noggin and up-regulating the expression of the BMP-2, Smads, Runx2, OSX. Noggin as an inhibitor of MMPs may be a novel anti-osteoporosis target.

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