Early studies showed that the reprogramming process is mutagenic, with a mutation rate that is 10 times higher than background levels of cells in ex vivo culture [104 106].
When treated with perifosine, edelfosine, or miltefosine alone (Figure 4B), both subline cells displayed a background level of cell death, suggesting that these three ALP compounds do not induce nonspecific cytotoxicity in this cell line system at the concentrations used in this experiment.
Solutions of saponin (0.008%, 0.010%, 0.012%, 0.013%, 0.014%, and 0.020% in HBSS; w/v; Sigma Chemical Co ., and HBSS only (to determine the background level of cell death), were addressed one at a time at 80 nl/s for 30 s in 200-μm-wide lanes (15 dyn/cm2 shear stress).
The NA peptide pool (N1/CA PP), used as a control in this experiment, induced only background levels of T cells, demonstrating that little or no T-cells induced by the infection with the swine virus were present in the lungs three days after challenge.
Transdution of cells with Adp53HRCaax in the absence of FTI resulted in only background levels of apoptotic cells, similar to those of mock tranduction.
Mouse immunization with Ad5 vector resulted in background levels of T-cell activation (0.83%).
In some of the cases, the swarming community "escaped" (white arrow), with no or background levels of SB cells in the "escaped" dendrite.
Throughout the challenge trial, the control groups had healthy-looking gills with background levels of epithelial hyperplasia (cell proliferation) in small areas that were considered standard for farmed fish [H. D. Rodger, pers. obs.].
The CE-dGuo adduct has been identified from calf thymus DNA and cultured cells treated with methylglyoxal, and in background levels of human melanoma cells and in plasmid DNA isolated from Escherichia coli.
