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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제59권 제4호
발행연도
2018.1
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511 - 518 (8page)

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Purpose: Hepatitis C virus (HCV) infection is a major cause of liver disease. Several miRNAs have been found to be associatedwith HCV infection. This study aimed to investigate the functional roles and possible molecular mechanisms of miR-215 in HCVreplication. Materials and Methods: The expression levels of miR-215 and TRIM22 were detected by quantitative real-time PCR (qRT-PCR)and western blot analysis in Con1b subgenomic genotype 1b HCV replicon cells (Con1b cells) and JFH1 full genome infectingHuh7.5.1 cells (Huh7.5.1 cells). HCV RNA levels were measured by qRT-PCR. The protein levels of NS3, NS5A, p65 subunit of NF-κB (p65), and phosphorylated p65 (p-p65) were determined by western blot analysis. The relationship between miR-215 andTRIM22 were explored by target prediction and luciferase reporter analysis. Results: miR-215 overexpression enhanced HCV replication in Con1b cells, while miR-215 knockdown suppressed HCV replicationin Huh7.5.1 cells. TRIM22 was confirmed to be a direct target of miR-215. TRIM22 upregulation resulted in a decline in HCVreplication, while TRIM22 inhibition led to enhancement of HCV replication. Additionally, exogenous expression of TRIM22 reversedthe facilitating effect of miR-215 on HCV replication, while TRIM22 downregulation counteracted the inhibitory effect ofmiR-215 knockdown on HCV replication. Furthermore, miR-215 targeted TRIM22 to block the NF-κB pathway, and exerted apositively regulatory role on HCV replication. Conclusion: miR-215 facilitated HCV replication via inactivation of the NF-κB pathway by inhibiting TRIM22, providing a novelpotential target for HCV infection.

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