After a total body irradiation (3.0 Gy 200 kV X-rays), the mice received an injection with 5 × 10 cells intravenously from the green fluorescence protein (GFP luciferase-marked, human MM cell line U266.
When stably transfected with recombinant ODAM the MDA-MB-231 breast cancer cell line showed marked inhibition of neoplastic and metastatic properties in vivo and in vitro[ 18].
The MDA-MB-361 cell line showed marked up-regulation of ER and PR shortly after commencing treatment with L + T. Therefore, we asked whether ER might be the mechanism for de novo resistance in this model.
Indeed, although BEZ235/CI-1040 treassociatedociated with a control miRNA did not display any cytotoxicity, the same treatment in combination with miR-491-5p (or siRNA-BCL-XL) induced a marked apoptosis in the SKOV3 cell line.
In marked contrast, when cell lines were preincubated with 10 ng/ml TRAIL for 30 min before the treatment with increasing concentrations of doxorubicin a profound sensitization and strongly increased cell death induction was seen in all cell lines.
Tumours established from the drug-sensitive A2780 cell line show a marked growth inhibition when treated with the maximum tolerated dose of paclitaxel (15 mg/kg, i.v.×3; Fig. 1).
Each cancer cell line had a marked decrease in cell viability in the presence of TBHP following pretreatment with 500 µM sulindac (Figure 1A and 1B).
Our data showed that two critical elements had a role in the marked resistance to apoptosis in this cell line.
In all cell (line)s, a marked calcium deposition was only seen when the cells were cultured in OM and OM/D (both containing β-glycerol phosphate).
In these experiments, combined exposure to TRAIL and IR resulted in a sensitisation effect with marked enhancement of apoptosis in one RCC cell line only (clearCa-22).
