Journal: Frontiers in Immunology
Article Title: Platelet-rich plasma-derived microRNA let-7a-5p alleviates knee osteoarthritis by regulating macrophage polarization and improving inflammatory microenvironment
doi: 10.3389/fimmu.2026.1756467
Figure Lengend Snippet: Validation of the targeting relationship between let-7a-5p and MAPK8. (A) Schematic representation of the predicted complementary binding site between let-7a-5p and the 3′-UTR of MAPK8. (B) Relative mRNA expression level of MAPK8 in macrophages overexpressing let-7a-5p detected by RT-qPCR. (C) WB analysis of MAPK8 protein expression in macrophages overexpressing let-7a-5p. (D) Inhibitory effect of let-7a-5p on MAPK8 expression was assessed via a dual luciferase reporter assay. ( **P < 0.01, ***P < 0.001).
Article Snippet: Subsequently, the tissue sections and cells were incubated overnight at 4°C with primary antibodies against iNOS (Proteintech 22226-1-AP), CD206 (Proteintech 18704-1-AP) and MAPK8 (Proteintech 66210-1-Ig).
Techniques: Biomarker Discovery, Binding Assay, Expressing, Quantitative RT-PCR, Luciferase, Reporter Assay