Journal
MOLECULAR AND CELLULAR BIOCHEMISTRY
Volume 476, Issue 7, Pages 2823-2835Publisher
SPRINGER
DOI: 10.1007/s11010-021-04127-z
Keywords
Acute pulmonary embolism; Curcumin; Sp1; MicroRNA-21; PTEN; NF-κ B signaling pathway
Categories
Funding
- Natural Science Foundation of Shaanxi Province [2020JM-664]
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The study demonstrated that Curcumin inhibited lung injury and inflammation in acute pulmonary embolism (APE) rats by modulating the miR-21/PTEN/NF-kappa B axis.
This study was intended to investigate the effect of Curcumin on acute pulmonary embolism (APE) via microRNA-21 (miR-21)/PTEN/NF-kappa B axis. APE model was induced on rats and administrated with Curcumin. Western blot analysis and RT-qPCR manifested the downregulation of Sp1, miR-21 and NF-kappa B, but the upregulation of PTEN in Curcumin-treated APE rats. Blood gas analysis, ELISA, and weighing of wet weight/dry weight (W/D) ratio indicated that Curcumin diminished mPAP and RVSP levels, W/D ratio, thrombus volume, and inflammatory factors in the lungs of APE rats. Further mechanical analysis was conducted by dual-luciferase reporter assays and ChIP assay, which showed that Sp1 increased miR-21 expression by binding to the miR-21 promoter, and that PTEN was targeted by miR-21. The APE rats were injected with adenovirus to evaluate the effect of Sp1, miR-21, or PTEN on lung injury and inflammation. It was observed that downregulation of miR-21 or Sp1, or upregulation of PTEN diminished mPAP and RVSP levels, W/D ratio, thrombus volume, and inflammatory factors in the lungs of APE rats. In summary, Curcumin decreased miR-21 expression by downregulating Sp1 to upregulate PTEN and to impair the NF-kappa B signaling pathway, thus suppressing lung injury and inflammation in APE rats.
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