例如:"lncRNA", "apoptosis", "WRKY"

Circular RNA circ-Ttc3 protects HaCaT cells from hypoxic injury by downregulation of miR-449a.

IUBMB Life. 2020 Mar;72(3):505-514. doi:10.1002/iub.2236. Epub 2020 Feb 11
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摘要


BACKGROUND:Pressure ulcer (PU) is a common complication of acute and long-time hospitalization, especially in elderly patients. The incidence and prevalence of PU are swiftly fortifying. Currently, our purpose was to investigate the functional impacts of circ-Ttc3 on PU. METHODS:HaCaT cells were pretreated under hypoxia condition. Cell counting kit 8 assay and flow cytometry were utilized to test HaCaT cell viability and apoptosis. Quantitative reverse transcription polymerase chain reaction was utilized to determine circ-Ttc3 and miR-449a expression. Western blot was performed to examine apoptosis-associated proteins expression. Subsequently, the above-described investigations were reperformed after miR-449a upregulation. RESULTS:Hypoxia induced apoptosis and declined viability in HaCaT cells. Circ-Ttc3 expression was enhanced after transfection with circ-Ttc3 expressing vector. Overexpressing circ-Ttc3 raised viability and reduced apoptosis in HaCaT cells. Moreover, miR-449a expression was elevated by hypoxia and reversed by overexpressing circ-Ttc3. And circ-Ttc3 exerted its effect via downregulating miR-449a. Finally, overexpressing circ-Ttc3 activated nuclear factor kappa-B (NF-κB) and phosphatidylinositol 3 kinase (PI3K)/protein kinase B (AKT) pathways via downregulating miR-449a. CONCLUSION:Our data suggested that circ-Ttc3 alleviated hypoxic injury and activated NF-κB and PI3K/AKT pathways by downregulating miR-449a in HaCaT cells.

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