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TRPV4离子通道在RANKL诱导的破骨细胞分化中的作用

Chinese Journal of Osteoporosis and Bone Mineral Research(2015)

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Abstract
破骨细胞(osteoclast,OC)来源于血液单核-巨噬细胞系统,其以多核细胞形式发挥作用.破骨细胞在分化过程中受多种信号通路的调控,其中,由核因子受体活化因子(receptor activator of nuclear factor-κB,RANK)及其配体(receptor activator of NF-κB ligand,RANKL)以及骨保护素(osteoprotegefin,OPG)组成的RANK-RANKL-OPG系统起到关键作用,而该通路的调控效应主要通过Ca2-NFATc1信号轴实现.瞬时感受器电位香草酸受体4(transient receptor potential vanilloid 4,TRPV4)是瞬时感受器电位通道(transient receptor potential,TRP)超家族的成员,该通道介导的钙离子内流维持了破骨细胞内钙离子浓度,确保了RANKL介导的NFATc1调控的基因转录,在破骨细胞的终末期分化中发挥着关键作用.因此,全面了解TRPV4离子通道将有助于临床更好地分析各种骨代谢性疾病的病因及发病机制,进而为治疗提供理论依据.
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Key words
osteoclast,transient receptor potential vanilloid 4,calcium
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