Pluripotent stem cells were differentiated as previously described (Kurian et al, 2012). Briefly, undifferentiated human ES/iPS cells were freshly split on to matrigel-coated plates, making sure the sub-colonies were of small size (~300-500 cells /colony). Cells were differentiated using the chemically defined mesodermal induction media (MIM) (DMEM:F12, 15mg/ml stem cell grade BSA (MP biomedicals), 17.5µg/ml Human Insulin, (SAFC bioscience), 275 µg/ml Human holo transferrin (Sigma Aldrich), 20ng/ml bFGF (Hymanzyme), 50ng/ml Human VEGF-165 aa (Humanzyme), 25ng/ml human BMP4 (Stemgent), 450µM monothioglycerol (Sigma Aldrich), 2.25mM each L-Glutamine and Nonn-essential amino acids (Invitrogen).
Human ES cells, H1 (WA1, WiCell), (passage 25-40) were cultured in chemically defined hES/hiPS growth media, mTeSR on growth factor reduced matrigel (BD biosciences) coated plates. Briefly, 70-80% confluent hES/hiPS cells were treated with dispase (Invitrogen) for 7 minutes at 37¡C and the colonies were dispersed to small clusters and lifted carefully using a 5ml glass pipette, at a ratio of ~1:6. Human Umbilical Vein Endothelial Cells (HUVEC) were purchased from Promocell and cultivated in EBM medium supplemented with EGM singlequots (Lonza). iPS/ES-derived endothelial cells were cultivated in EGM-2 bullet kit (Lonza). All the endothelial cells were grown on collagen I coated plates (BD biosciences). All cell lines were maintained in an incubator (37¡C, 5% CO2) with media changes every day (hES/hiPS) or every second day (HUVEC).
Total RNA from roughly 10x106 cells was isolated using TRIzol reagent (Invitrogen). Intact total RNA samples were treated with DNase1. All the RNA samples met the following RNA quality- OD260/280 = 2-2.2; OD260/230 ³ 2.0; 28S:18S > 1.0, RIN>7.
200 ng of total RNA were amplified using the Ambion WT Expression Kit (Ambion/Applied Biosystems), labeled using the WT Terminal Labeling Kit (Affymetri
Samples were hybridized to Human Gene 1.0 ST for 16 h at 45ºC and 60 rpm in a GeneChip® Hybridization Oven 640
Affymetrix GeneChip Scanner 3000 7G
H1 cells with stable control (scramble) shRNA
CEL files were analyzed using the oligo package in R/Bioconductor and normalized using RMA