Journal: Molecular cancer research : MCR
Article Title: Aberrant induction of a mesenchymal/stem-cell program engages senescence in normal mammary epithelial cells.
doi: 10.1158/1541-7786.MCR-19-1181
Figure Lengend Snippet: a, Western analysis of SMAD2, SMAD3, and ACTIN (loading control) levels in SKD-HMEC expressing shRNAs targeting GFP (shGFP), SMAD2 (shSMAD2), or SMAD3 (shSMAD3). b-f, SKD-HMEC expressing shRNAs targeting GFP (shGFP), SMAD2 (shSMAD2), or SMAD3 (shSMAD3) were left untreated or treated with recombinant OSM [10 ng/mL] for 10 days and then subjected to the following assays. b, Relative growth assays of shGFP-, shSMAD2-, and shSMAD3-expressing HMEC grown in the presence (+) and absence (−) of OSM. Mean ± SEM (error bars) of all triplicates are presented for each sample. c, Senescence-associated β-galactosidase (SA-β-Gal) activity staining (blue) in untreated shGFP-, shSMAD2-, and shSMAD3-expressing HMEC and cells treated with OSM. Scale bar, 150 μm. d, Flow cytometry of CD24 and CD44 surface-profile expression in shGFP-, shSMAD2-, and shSMAD3-expressing SKD-HMEC grown in the presence (+) and absence (−) of OSM. CD44LO cells are shown as red and CD44HI cells as blue. Black numbers represent the percent of total cell population that are CD44HI. e, qRT-PCR analysis of cells grown in the presence (+) and absence (−) of OSM using primers targeting CD44s (SC gene; left) and SNAI1 (EMT gene; right) f, Following treatment with OSM [10 ng/mL] for 10 days, mRNA was harvested from shGFP-, shSMAD2-, or shSMAD3-expressing SKD-HMEC and subjected to a targeted Human EMT qRT-PCR profiler array. Heat map displaying non-supervised hierarchical clustering of fold-regulation gene expression data between OSM-treated cells relative to untreated shGFP-cells with the brightest green representing the smallest value, brightest red the highest value, and black the average magnitude of gene expression. Error bars indicate mean ± SEM of three independent experiments. Statistically significant differences are indicated with * when P < 0.05, ** when P < 0.01, *** when P < 0.001, and **** when P < 0.0001. Differences with a P value > 0.05 were considered non-significant and indicated with ns.
Article Snippet: 15 , 16 , 20 The retroviral plasmids pRetroSUPER-Puro shSMAD2 and pRetroSUPER-Puro shSMAD3 (Addgene plasmid #s 15722 and 15726) were gifts from and deposited to Addgene by Dr. Joan Massague (Memorial Sloan-Kettering Cancer Center); and pRetroSUPER-Puro shGFP was obtained from Dr. Yosef Shiloh (Department of Neurobiology, Tel Aviv University, Tel Aviv, Israel).
Techniques: Western Blot, Expressing, Recombinant, Activity Assay, Staining, Flow Cytometry, Quantitative RT-PCR