Journal: Oncotarget
Article Title: Connexin40 controls endothelial activation by dampening NFκB activation
doi: 10.18632/oncotarget.16438
Figure Lengend Snippet: (A) Cx40 immunostaining (green) in communication-incompetent HeLa cells (left panel) and in HeLa cells stably transfected with Cx40 (right panel). DAPI (blue). (B) Intercellular communication was measured by Lucifer Yellow microinjection during 3 min. Images are representative examples of Lucifer Yellow diffusion in parental HeLa cells (upper panel, N=6) and in HeLa cells stably transfected with Cx40 (lower panel, N=10). Asterisks indicate the microinjected cells. (C) Western blots (upper panel) showing the induction of Phospho-NFκB after 5 min stimulation with 20 ng/ml TNFα (+) as compared to control conditions (-) in parental HeLa cells and in HeLa cells stably transfected with Cx40. Expression of Cx40 reduced TNFα-induced NFκB phosphorylation (lower panel). N=3. (D) Cx40 immunostaining (green) in communication-incompetent HeLa cells transiently transfected with full-length Cx40 (left panel) or with Cx40CT (right panel). DAPI (blue). (E) Lysates of parental HeLa cells (lane 1) or transiently transfected with Cx40 (lanes 2 and 4) or Cx40CT (lanes 3 and 5) or stably transfected with Cx40 (lane 6) were immunoblotted against Cx40 and GAPDH. (F) Intercellular communication was measured by Lucifer Yellow microinjection during 5 min. Images are representative examples of Lucifer Yellow diffusion in HeLa cells transiently transfected with Cx40 (upper panel, N=8) or Cx40CT (lower panel, N=6). Asterisks indicate the microinjected cells. (G) Induction of Phospho-NFκB after 5 min stimulation with 20 ng/ml TNFα in HeLa cells transiently transfected with Cx40 or Cx40CT. Expression of Cx40 or Cx40CT revealed a similar protection against TNFα-induced NFκB phosphorylation. N=3. Scale bar represents 10 μm in (A) and (D), and 15 μm in (B) and (F).
Article Snippet: Subsequently, primary antibodies against Cx40 (Cx40-A; Alpha-Diagnostics lot #175455A8.6; 1/200), Cx37 (Cx37A11-A; Alpha-Diagnostics lot #175859A5-L; 1/50), NFκB (NFκB p65 (A) sc-109; Santa Cruz; 1/100) or Phospho-NFκB (Phospho-NFκB (S536)(93H1); Cell Signaling; 1/100) in blocking solution were applied overnight at 4°C.
Techniques: Immunostaining, Stable Transfection, Transfection, Microinjection, Diffusion-based Assay, Western Blot, Control, Expressing, Phospho-proteomics