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- W2510034411 abstract "The precise role of interleukin-1 beta (IL-1β)-induced extracellular matrix degeneration in the pathogenesis of intervertebral disc degeneration (IDD) is currently unknown. Recent evidence has revealed that microRNAs (miRNAs) are associated with IDD, but their function in the extracellular matrix degradation of nucleus pulposus (NP) tissues is also poorly understood. The aim of this study was to evaluate the expression and functional role of miR-7 in IL-1β-induced disc degeneration. The expression level of miR-7 was investigated in degenerative NP tissues and in IL-1β-induced NP cells using quantitative reverse transcription-polymerase chain reaction amplification analysis. A dual-luciferase reporter assay was then utilized to determine whether growth differentiation factor 5 (GDF5) is a target of miR-7. Finally, mRNA and protein levels of known matrix components and of matrix degradation enzymes were determined to elucidate the function of miR-7 in IL-1β-induced disc degeneration. In this study, we found that miR-7 is highly expressed in human degenerative NP tissues and in IL-1β stimulated NP cells compared to normal controls. We also determined that GDF5 was a target of miR-7. Functional analysis showed that the overexpression of miR-7 significantly enhanced the IL-1β-induced extracellular matrix degeneration, whereas inhibition of miR-7 function by antagomiR-7 prevented NP cell detrimental catabolic changes in response to IL-1β. Additionally, the prevention of IL-1β-induced NP extracellular matrix degeneration by miR-7 silencing was attenuated by GDF5 siRNA. These findings suggest that miR-7 contributes to an impaired ECM in intervertebral discs through targeting GDF5 and miR-7 might therefore represent a novel therapeutic target for the prevention of IDD." @default.
- W2510034411 created "2016-09-16" @default.
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- W2510034411 date "2016-10-01" @default.
- W2510034411 modified "2023-10-15" @default.
- W2510034411 title "MicroRNA-7 regulates IL-1β-induced extracellular matrix degeneration by targeting GDF5 in human nucleus pulposus cells" @default.
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- W2510034411 doi "https://doi.org/10.1016/j.biopha.2016.08.062" @default.
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