Figure 7. Regulation of MAPK signaling in differentiating micromass cultures by TG2.
A – activity of ERK and JNK pathways were analyzed with specific luciferase reporter constructs (SABiosciences). Five days-old RCAS-infected micromass cultures were transiently transfected with reporter constructs and luciferase activity was measured 72 hours later using luciferase assay kit (Promega). B – Western blot analysis of phosphorylated p38 detected with specific antibody 9212 (Cell Signaling Technologies, MA). C – treatment of micromass cultures with p38 inhibitor SB203580 (10 μM) reduces transcript levels for xyloxyltransferase 2, measured by real-time RT-PCR (**, p<0.01).