Journal: Cancers
Article Title: Chemokine CXCL12 Activates CXC Receptor 4 Metastasis Signaling Through the Upregulation of a CXCL12/CXCR4/MDMX (MDM4) Axis
doi: 10.3390/cancers16244194
Figure Lengend Snippet: CXCL12 addition does not increase MDMX protein half-life following cycloheximide or MG132 treatment. ( A ) Immunoblot analysis of lysates from MDA-MB-231 cells treated with CXCL12 (50 ng/mL) for 30 min followed by cycloheximide (CHX) or DMSO for 40 or 80 min. Cells were harvested and lysed in CHAPS lysis buffer and subjected to immunoblotting to probe for MDM2 and MDMX. Actin was probed as a loading control. ( B , C ) Evaluation of Western blot band density was carried out using ImageJ and Prism software. Error bars represent SD. * p < 0.05, NS = non-significant. ( D ) HCT116 p53-/- cells were transfected with pcDNA3-MDMX for 24 h and then treated with CXCL12 (50 ng/mL) for 30 min followed by MG132 or DMSO for 40 or 80 min. Cells were harvested and lysed in CHAPS lysis buffer and subjected to immunoblotting to probe for MDM2, MDMX, and Ubiquitin. Actin was probed as a loading control. ( E , F ) Evaluation of Western blot band density was carried out using ImageJ and Prism 10 software. Error bars represent SD. * p < 0.05, NS = non-significant.
Article Snippet: MDM2 R&D Systems Cat no. AF1244 (1:2000) Rabbit in 1% milk PBST, MDMX, 53BP1 Cell Signaling (1:1000) Rabbit in 1% milk TBST, PARP-1 Proteintech (1:1000) Rabbit in TBST, GST Santa Cruz Technologies (1:2000) Mouse in 1% milk PBST, Ubiquitin Cell Signaling Rabbit Polyclonal Ab (1:10,000) in 5% BSA PBST, CXCR4 mouse antibody Proteintech (1:2000) Cat No. 60042-1-Ig in 1% milk PBST, phospho-AKT S473 Cell Signaling (1:1000) Cat No. 9217S Rabbit 5% BSA in TBST, and MDMX (Cat No. 17914-1-AP; Proteintech, Rosemont, IL, USA).
Techniques: Western Blot, Lysis, Control, Software, Transfection, Ubiquitin Proteomics