Journal: bioRxiv
Article Title: Unanchored ubiquitin chains promote the non-canonical inflammasome via UBXN1
doi: 10.1101/2024.10.30.621131
Figure Lengend Snippet: ( a, b ) Streptavidin pulldown of biotinylated (Bio) LPS from HeLa cells that were primed with IFN-γ and transfected with biotin or Bio-LPS for 5 h. Bio-LPS was detected with a streptavidin-conjugated HRP (horse radish peroxidase). IB, immunoblot. ( c ) Immunofluorescent confocal images in BMDMs that were primed with IFN-γ and transfected with FITC-LPS. DNA was stained by DAPI. Arrows point to colocalizations of FITC-LPS, UBXN1 and caspase-11 in WT, and localization of FITC-LPS in UBXN1 -/- BMDMs. Mock: transfection reagent only. Scale bar: 10 µm. ( d ) The cell death (LDH release) of HeLa cells that were primed with 10 ng/mL of IFN-γ for 12 h and transfected with a CASP4 or GSDMD plasmid for 24 h. Error bar, mean ± S.E.M., N=2 independent experiments. ( e ) Immunoblots of GSDMD in HeLa cells transfected with a FLAG-APEX-CASP4 and/or Myc-UBXN1 plasmid. The cells primed with IFN-γ and transfected with LPS serve as a positive control for GSDMD cleavage. FL, full-length; NT, active N-terminal fragment.
Article Snippet: Biotinylated LPS ( E. coli 0111:B4, Cat# tlrl-lpsbiot) was a product of InvivoGen.
Techniques: Transfection, Western Blot, Staining, Plasmid Preparation, Positive Control