Journal: The Journal of Biological Chemistry
Article Title: Mechanism of NUMBL enhancing axitinib resistance in clear cell renal cell carcinoma by UCHL1-mediated deubiquitination of MMP9
doi: 10.1016/j.jbc.2025.110873
Figure Lengend Snippet: UCHL1 stabilizes the expression of MMP9 protein. A , heatmap of the correlation between NUMBL and the VM gene set. B , identify the intersection between the ECM gene set and the VM gene set. C – F , correlation analysis of the four genes in the intersection with UCHL1 in the CPTAC database. G – H , knocking down NUMBL in 769P cells results in decreased expression of MMP9. I – J , treating 769P cells with 20 μM of MG-132 for 12 h results in increased expression of MMP9. K , the co-IP experiment detects an interaction between MMP9 and UCHL1. L , MMP9 undergoes ubiquitination modification. M and P , WB is used to detect the efficiency of knocking down UCHL1. N , knocking down UCHL1 in 769P cells results in increased ubiquitination levels of MMP9. O , immunofluorescence staining reveals colocalization of UCHL1 and MMP9 in the cytoplasm of 769P cells. Data were shown as mean ± SD of at least three independent experiments for every cell line. Statistical differences were determined using Tukey's post hoc one-way ANOVA test. NS, nonstatistically significant, ∗ p < 0.05, ∗∗ p < 0.01, and ∗∗∗ p < 0.001. co-IP, coimmunoprecipitation; CPTAC, Clinical Proteomic Tumor Analysis Consortium; ECM, extracellular matrix; MMP9, matrix metalloproteinase 9; UCHL1, ubiquitin C-terminal hydrolase L1; VM, vasculogenic mimicry; WB, Western blot.
Article Snippet: The human renal cancer cell lines 769P, OSRC2, and ACHN (obtained from the American Type Culture Collection) were cultured using standard methods.
Techniques: Expressing, Co-Immunoprecipitation Assay, Ubiquitin Proteomics, Modification, Immunofluorescence, Staining, Western Blot