Journal: Nature Cardiovascular Research
Article Title: Network-based prioritization and validation of regulators of vascular smooth muscle cell proliferation in disease
doi: 10.1038/s44161-024-00474-4
Figure Lengend Snippet: a , Phosphokinase array and densitometric quantification of serum-starved hVSMCs treated for 15 min with 500 ng ml −1 rhTIMP1 or vehicle control ( N = 1 donor). b , Western blot of total STAT3, phospho-STAT3 (S727 or Tyr705), total AKT, phospho-AKT (pAKT), total p38a, phospho-p38a (p-p38a) and GAPDH in serum-starved hVSMCs after 0 min, 5 min, 10 min, 15 min and 30 min rhTIMP1. c , Quantification of relative western blot band intensity, normalized to GAPDH. The points show independent hVSMC isolates ( N = 4), the bars indicate the means, and the error bars indicate s.e.m.; P value: one-way ANOVA. d , Number of clonally expanded patches formed by lineage-labeled VSMCs following 21 days of culture, without (white, circles) or with 500 ng rmTIMP1 (blue, squares) in samples treated with vehicle (DMSO), 10 µM TT101 (STAT3i), 100 nM MK-2206 (AKTi), 10 µM SB202474 (control inhibitor, ctrl), 10 µM SB203580 (p38i1) or 10 µM SB202190 (p38i2). The points show averages ( N = 3 Myh11–Confetti animals analyzed in triplicate), the bars indicate means, the error bars indicated s.e.m.; P value: two-tailed t -test. e , Quantification over time of clonally expanded patches formed by lineage-labeled VSMCs, treated with non-targeting control (NTC) or Stat3 -targeting siRNA (siSTAT3) ±500 ng rmTIMP1. The points indicate means ( N = 3 Myh11–Confetti animals analyzed in triplicate), and the error bars indicated s.e.m.; P = 2.2 × 10 −7 , generalized linear model. f , ChIP–qPCR analysis at STAT3 targets ( TWIST and JUNB ) and negative control ( AMICA1 ), in serum-starved control and rhTIMP1-treated hVSMCs (15 min, 500 ng ml −1 ), showing anti-STAT3 and control-IgG precipitated DNA as a percentage of the input. The bars show the means of independent hVSMC isolates ( N = 3 donors), and the error bars indicate the s.e.m.; P value: two-tailed t -test. g , pSTAT3 S727 immunostaining (magenta) in cryosections from carotid plaque in an Myh11–Confetti/Apoe animal (11 weeks HFD) with Myh11–Confetti signals (CFP, blue; RFP, red; YFP, yellow; GFP, green). Representative of three animals. Scale bar = 50 µm (applies to both images in panel). h , i , pSTAT3 S727 and KI67 immunostaining ( h ) and quantification ( i ) of serum-starved control hVSMCs ±500 ng ml −1 rhTIMP1 treatment (15 min, h ) or indicated time points ( i ). The arrowheads indicate KI67 + cells. Scale bars = 50 µm. The symbols show average values for independent hVSMC isolates ( N = 3 donors, analyzed in triplicate), the lines represent means and the error bars represent s.e.m.; P value: two-way ANOVA, * P = 0.0498; NS, not significant.
Article Snippet: Phosphokinase array (R&D Systems, ARY003C) was incubated with cell lysates according to the manufacturer’s instructions.
Techniques: Control, Western Blot, Labeling, Two Tailed Test, Negative Control, Immunostaining