Journal: Experimental & Molecular Medicine
Article Title: FGF12 induces aberrant mechanosignaling in aortic smooth muscle cells during thoracic aortic aneurysm formation in Marfan syndrome mice
doi: 10.1038/s12276-025-01621-y
Figure Lengend Snippet: a FGF12 induces RhoA activation in HASMCs. Levels of GTP-bound RhoA (RhoA-GTP) were measured by RhoA pulldown assays in untransduced and Ad-transduced HASMCs. b Losartan reduces FGF12 -induced RhoA activation. Following Ad transduction, HASMCs were treated with or without losartan. c FGF12 enhances phosphorylation of MLC (p-MLC) and cofilin (p-cofilin) via ROCK. Western blotting was performed on untransduced and Ad-transduced HASMCs treated with or without the ROCK inhibitor (Y27632). d FGF12 promotes nuclear translocation of MRTF-A and stress fiber formation via ROCK. Following Ad transduction, HASMCs were treated with or without Y27632 and stained for MRTF-A (green) and with phalloidin (red). e FGF12 upregulates integrin α5, integrin β1 and paxillin expression and enhances phosphorylation of SRC (p-SRC) and FAK (p-FAK) via ROCK. Western blotting was performed on untransduced and Ad-transduced HASMCs treated with or without Y27632. f FGF12 promotes FA formation via ROCK. Following Ad transduction, HASMCs were treated with or without Y27632 and stained for paxillin (green) and with phalloidin (red). g FGF12 increases cellular stiffness, which is suppressed by losartan or Y27632. After Ad transduction, HASMCs were treated with or without losartan and/or Y27632. The stiffness of individual cells was measured by AFM nanoindentation and is expressed as Young’s modulus ( n = 10–15 cells per group). In a – c and e , RhoA-GTP and phospho-protein levels were normalized to total protein. Protein levels are quantified relative to untransduced controls (Cont, set as 1; n = 3 independent experiments). In d and e , images and quantified data are representative of three independent experiments. Nuclei are stained with DAPI (blue). Scale bars, 20 μm. All data are presented as mean ± s.e.m. and were analyzed by one-way ANOVA with Bonferroni’s post-hoc test (* P < 0.05, ** P < 0.01, *** P < 0.001).
Article Snippet: Active RhoA (GTP-bound RhoA) was measured using a RhoA activation assay kit (Cytoskeleton).
Techniques: Activation Assay, Transduction, Phospho-proteomics, Western Blot, Translocation Assay, Staining, Expressing