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| ERα-AMPK-Sirt1信号通路在骨质疏松症中的作用 |
| The role of ERα-AMPK-Sirt1 signaling pathway in osteoporosis |
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| DOI:10.3969/j.issn.1006-7108.2019.08.024 |
| 中文关键词: 骨质疏松症 雌激素受体α 单磷酸腺苷活化蛋白激酶 沉默信息调节因子2相关酶1 |
| 英文关键词:osteoporosis estrogen receptor alpha AMP-activated protein kinase Sirtuin 1 |
| 基金项目:国家自然科学基金面上项目(81373654);广东省自然科学基金项目(2015A030313351);广东省科技计划项目(2014A020221052) |
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| 中文摘要: |
| 近年来,与骨代谢相关的分子信号通路成为研究的热点。其中Wnt/β-catenin信号通路、RANKL/RANK/OPG信号通路、NF-κB信号通路、PPAR-γ信号通路、PTH信号通路、MAPK信号通路、PI3K/Akt信号通路、Hedgehog信号通路和Notch信号通路对骨质疏松症的发病具有重要意义,但目前尚未有关于ERα-AMPK-Sirt1信号通路的研究报道。雌激素受体α(ERα)通过与配体结合、单磷酸腺苷活化蛋白激酶(AMPK)通过磷酸化作用、沉默信息调节因子2相关酶1(Sirt1)通过去乙酰化修饰等共同调控成骨细胞、破骨细胞的功能,且三者之间存在一定的上下游关系;研究表明ERα能够直接增加LKB1启动子的活性,而LKB1是AMPK最主要的上游蛋白激酶,活化的LKB1能够激活AMPK;AMPK可以激活Sirt1,而Sirt1反过来又可以通过磷酸化作用来激活AMPK,二者之间相互作用可参与调控成骨细胞的自噬或凋亡等,以上均提示了ERα-AMPK-Sirt1信号通路在骨质疏松症发病机制中的重要作用,因此有必要对ERα-AMPK-Sirt1信号通路进行深入研究,以便更好地指导临床抗骨质疏松新药物的研发,为临床实践提供更多可靠的偱证医学证据。 |
| 英文摘要: |
| In recent years, molecular signaling pathways related to bone metabolism has become a hot topic. Studies have revealed that signaling pathways associated with osteoporosis include Wnt/β-catenin, RANKL/RANK/OPG, NF-κB, PPAR-γ, PTH, MAPK, PI3K/Akt, Hedgehog and Notch signaling pathways. However, there has been no study concentrated on ERα-AMPK-Sirt1 signaling pathway. Estrogen receptor alpha (ERα), AMP-activated protein kinase (AMPK) and Sirtuin 1(Sirt1) can regulate the function of osteoblast or osteoclast by ligand binding, phosphorylation and deacetylation, respectively. Studies have indicated that ERα can directly increase the activity of LKB1, while LKB1 is the most important upstream protein kinase of AMPK, as a result, AMPK is activated. In addition, the mutual promotion of AMPK and Sirt1 can also modulate the autophagy or apoptosis of osteoblast; all these suggested that ERα-AMPK-Sirt1 signaling pathway may play an important role in the pathogenesis of osteoporosis. To sum up, it is necessary to start the research of ERα-AMPK-Sirt1 signaling pathway in order to better guide the development of new drugs and clinical practice. |
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