Journal: Science Progress
Article Title: ULK2 suppresses glycolysis to attenuate cisplatin resistance in ovarian cancer organoid via c-Jun phosphorylation
doi: 10.1177/00368504261421695
Figure Lengend Snippet: ULK2 modulated c-Jun phosphorylation in ovarian cancer organoids. (A) Immunoblot analysis of phospho-c-Jun (Ser243) and c-Jun expression, with β-actin as loading control. (B) In vitro kinase assay to test the phosphorylation of c-Jun protein by ULK2 protein. (C-D) Quantification of ULK2 and c-Jun immunofluorescence signals was performed using IPP 6.0 software. E. ULK2 and c-Jun were examined by immunofluorescence. (F) Co-IP analysis indicated an interaction between ULK2 and c-Jun in chemoresistant ovarian cancer organoid. (G) Analysis of protein stability by cycloheximide (CHX) chase assay. Western blot of organoid lysates following treatment with CHX (50 μg/mL) for the indicated durations. (H) c-Jun was immunoprecipitated from chemoresistant ovarian cancer organoids and subsequently probed with an antiubiquitin antibody by Western blot. (I) Analysis of c-Jun mRNA expression by qRT-PCR. (J) c-Jun silencing reduced the cell viability of chemo-resistant ovarian cancer organoid. Organoids were treated with 8 μg/L cisplatin in different time intervals. (K) Assessment of glucose uptake following the knockdown of c-Jun. (L) Analysis of lactate production subsequent to c-Jun silencing. (M) Effect of c-Jun overexpression was verified by qRT-PCR. (N) The overexpression of c-Jun counteracted the decrease in cell viability caused by the upregulation of ULK2 in chemo-resistant ovarian cancer organoid. (O) Glucose uptake assay. (P) Effects of ULK2 overexpression and c-Jun S243A mutation on cell viability in chemoresistant ovarian cancer organoids. Organoids were treated with 8 μg/L cisplatin in different time intervals. Q. ULK2 overexpression suppresses glucose uptake, which is rescued by the c-Jun S243A mutation in chemoresistant ovarian cancer organoids. * p < .05; ** p < .01.
Article Snippet: P-c-Jun (Ser243) antibody was obtained from Absin (abs148022, Shanghai, China), and c-Jun (9165) antibody was sourced from Cell Signaling Technology (Boston, MA, USA).
Techniques: Phospho-proteomics, Western Blot, Expressing, Control, In Vitro, Kinase Assay, Immunofluorescence, Software, Co-Immunoprecipitation Assay, Immunoprecipitation, Quantitative RT-PCR, Knockdown, Over Expression, Mutagenesis