例如:"lncRNA", "apoptosis", "WRKY"

miR-409-5p negatively regulates Wnt/Beta catenin signaling pathway by targeting Lrp-8.

J. Cell. Physiol.2019 Dec;234(12):23507-23517. doi:10.1002/jcp.28919. Epub 2019 Jun 04
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摘要


Signaling pathways like Wnt play a vital part in all aspects of skeletal development which include osteoblastogenesis and osteoclastogenesis. Inactivation of Wnt signaling pathway leads to bone-related disorders, whereas activation of Wnt signaling pathway can cure bone pathologies like osteoporosis. Certain microRNA(s) have been identified that commune with Wnt signaling molecules to regulate osteogenesis. In this study we reported the identification of miR-409-5p as a suppressor of osteogenesis by targeting Lrp-8 which is a positive effector of Wnt signaling. Our study showed that overexpressing miR-409-5p inhibits osteoblast differentiation whereas obstructing miR-409-5p expression by anti-miR-409 promotes osteoblast functions and matrix mineralization. Using tools like targetscan and 3'-UTR luciferase reporter assay, Lrp-8 was confirmed as a straight target of miR-409-5p. By over expressing miR-409-5p, a repression of canonical Wnt/β catenin signaling was observed. These observations were strengthened by the fact that silencing of miR-409-5p in ovariectomized estrogen deficient Balb/c mice restored the loss of trabecular bone microarchitecture and suppressed bone resorption. Thus, targeting miR-409-5p may be helpful in increasing bone density in conditions like post menopausal osteoporosis.

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