Cells were collected by gently pipetting and replated onto fresh Matrigel-coated dishes

and the BCA Protein Assay Kit according to the manufacturer’s instructions. For analysis of caspase activity, cells were lysed for 60 min on ice in lysis buffer, and 50 ml of the reaction buffer was added to 50 ml of the cellular supernatant solution and further incubated with 5 ml of caspase-3 and caspase9 substrates for 4 h. Absorbance was read spectrophotometrically using a microplate reader. Excitation and emission wavelengths were set at 400 and 500 nm, respectively. primers, 2 ml diluted cDNA and 9.5 ml ddH2O. The reaction conditions were 95uC for 30 s, followed by 40 cycles of 95uC for 5 s, 60uC for 30 s. The relative expression of the genes was normalized against GAPDH or b-actin. Melting curves were examined for the quality of the PCR amplification of each sample, and quantification was performed using the comparative CT method. In vitro differentiation To examine in vitro differentiation, iPS cells treated with 100 nM maxadilan for 24 h were cultured using a 24-well plate with ultralow adhesiveness to produce embryoid bodies in suspension. The EBs were subsequently cultured in differentiation medium, which consisted of 80% DMEM/F12, 20% Knockout Serum Replacement, 1 mM L-glutamine, 0.1 mM b-mercaptoethanol and 0.1 mM non-essential amino acids. Control iPS cells were not treated with maxadilan. iPS cells aggregated and generated EBs for 18 days. The attached EBs expanded and Primers GAPDH YM-155 chemical information total-F GAPDH total-R b-actin total-F b-actin total-R PAC1 total-F PAC1 total-R Nanog total-F Nanog total-R OCT4 total-F OCT4 total-R SOX2 total-F SOX2 total-R REX1 total-F REX1 total-R UTF-1 total-F UTF-1 total-R TERT total-F TERT total-R NESTIN total-F NESTIN total-R PAX6 total-F PAX6 total-R SOX1 total-F SOX1 total-R PPAR total-F PPAR total-R GATA4 total-F GATA4 total-R FOXA2 total-F FOXA2 total-R SOX17 “7851504 total-F SOX17 total-R Sequences GeneBank Number BC059110 Karyotype analysis iPS cells were incubated with 100 nM maxadilan for 24 h on day 5 after passaging. The iPS cells were subsequently passaged three times without removing the spontaneously differentiated colonies. iPS cells that were not treated with maxadilan served as the control. iPS cells were incubated with 0.05 mg/ml of colcemid for 150 min at 37uC in a 5% CO2 incubator. Cells were washed with PBS and trypsinized for 2 min at room temperature. Cells were fixed in methanol/glacial acetic acid three times and then dropped onto slides for chromosome spreads. The slides were baked overnight at 55uC, treated with 0.05% trypsin for 30 s and stained with Giemsa solution. Maxadilan Prevents Apoptosis in iPS Cells ” differentiated into cells with various morphological features after being seeded onto Matrigel-coated plates and cultured for 20 days. RT-PCR was performed for the markers of ectoderm, mesoderm and endoderm, and RT-qPCR was performed for NESTIN and PAX6 gene expression levels in these cells as described above. groups were analyzed using Student’s t-tests. A p-value of less than 0.05 was considered statistically significant. Data are presented as the means 6 SEM. All results were derived from three independent experiments. Results Analysis of PAC1 in iPS cells To determine if PAC1 was present in iPS cells, RT-PCR and western blot analyses were performed. The primer sequences of PAC1 were shown in Immunofluorescence assay iPS cells were treated with 100 nM maxadilan for 24 h and passaged 3 times without removing the spontaneously differentiated colonies before the immunofluoresce