Thus, in the R0.8 cell line, resistance must be based on tolerating high intracellular cAMP.
Current therapies for hepatitis C are based on poorly tolerated pegylated interferon, but the development of highly effective all oral regimes [ 5] provides an opportunity to eliminate the virus from many regions of the world.
Oral doses of ZD4054 evaluated were 2.5, 10, 20, 30, 60, 120, 150 and 240 mg, with dose escalation continued based on tolerability until the maximum tolerated dose had been defined.
The dose of sunitinib was selected based on the maximum tolerated dose in a Phase I study in combination with FOLFIRI.
All the test materials were given at the three dose levels (low, medium, and high) based on the maximum tolerated dose observed in the toxicity test.
Phase I clinical studies have hitherto been relatively straightforward, selecting an active drug based on the maximum tolerated dose and taking successful candidate agents into phase II trials.
The imaging time point did depend on the total activity that was administered to the patient and was based on the maximum tolerated count rate of the SPECT system to acquire images without dead-time effects.
The selection of the dose for this study was empirical based on the maximum tolerated dose from previous studies in human volunteers and selected to ensure adequate PDE4 inhibition.
By necessity, we made the assumption that in most trials within the dataset studied, the agent doses are standard based on standard maximal tolerated doses defined by prior phase I trials.
The doses chosen were based on those safely tolerated in other murine nephropathy models in the literature [ 19, 25] and are 10-fold to 20-fold higher than those routinely received by humans (about 2.5 mg/kg per day).
