Cells were resuspended in PBS and stained according to protocol to detecting protein or activation of the phosphorylation state. An appropriate isotype control was utilized in each test to adjust for back ground fluorescence, and results are reported as Mean fluorescence intensity. sellckchem For each sample, at least 20,000 events were acquired in a FACSAria I cell sorter. Data were processed with the FACS Diva software. Quantitative real time PCR Total RNA from both types of cells was obtained after 3 hours of incubation using the PureLink Micro to Midi total RNA purification system. First strand cDNA was synthesized from 5 ug of total RNA using Super script III First Strand Synthesis Supermix. Real Time PCR was performed using a LightCycler 2. 0 apparatus and LightCycler FastStart DNA Inhibitors,Modulators,Libraries MasterPLUS SYBR Green I.

Analysis of PCR products was performed using LightCycler software. Data are Inhibitors,Modulators,Libraries expressed as relative quantities using a reference gene. Each sample was processed in tri plicate to verify the specificity of the amplification reac tion. Oligonucleotides used to amplify human I Ba, P65 RELA, BAD, BAK, BAX, NOXA, PUMA, P21, P53, P16, MCL 1, BCL XL, CASPASE 3, CASPASE 9, SURVIVIN, E6 and E7 and L32 RIBOSOMAL PROTEIN are shown in Table 1. Oligonucleotides were designed using the Oligo V6 software. Gene sequences were obtained from the GenBank Nucleotide Database of the National Center for Biotechnology Information. Statistical analysis Results of each experiment represent the meansstan dard deviation of three independent experiments carried out in triplicate.

Students t test Inhibitors,Modulators,Libraries was Inhibitors,Modulators,Libraries Inhibitors,Modulators,Libraries used for statistical analyses a value of P 0. 05 was considered significant. For the comparison of gene expression was considered as significant differences values of 30%. In some cases was calculated the % that represent the percent of increment or diminution in relation to com parative group. Results Effect of PTX and CIS, alone or in combination on cervix cancer cell line To evaluate the antiproliferative effects to different schedules of PTX, CIS or PTX CIS treatments, in a first step we determined the clonogenic assay, which is a proven method to study the chemosensitivity to anti tumor drugs. Table 2 shows a clearly dose response effect in CIS treated HeLa cultures in which toxicity increased with the dose.

Surprisingly, PTX also had cytotoxic effect per se, it was also dose dependant, because with the administered dose of 8 mM, the sur viving fraction was approximately 70% lower than that of the untreated control group. The combi nation of both drugs also shows a similar dose response effect, during reaching near 80% and 100% of toxi city with the two highest doses of PTX 8 and 16 mM and CIS at 4 and 8 uM respectively P 0. 05 vs untreated control cells. We carried out the same experiments using SiHa cells.