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https://www.selleckchem.com/products/gw-4064.html For every 10% decrease in RDI, the risk of death increased by 23% (HR 1.23, 95% CI 1.09-1.4, P = 0.001). For every increment of one cycle (and up to six), the risk of death decreased by 27% (HR 0.73, 95% CI 0.61-0.88, P = 0.001). On multivariate analysis, reduced RDI was the only predictor significantly associated with OS (HR 1.18, 95% CI 1.02-1.36, P = 0.026). CONCLUSIONS Our study suggests that in mCSPC, reduced docetaxel RDI is associated with shorter survival. Unnecessary dose reductions, treatment delays and early discontinuation should be avoided. Granulocyte colony-stimulating factor may be considered to maintain standard DI.PURPOSE Capecitabine is a prodrug of 5-fluorouracil (5-FU) used for the treatment of colorectal cancer, with a two-week course of administration. However, the variance in plasma concentration and metabolic enzyme activities after multiple administration of capecitabine and its metabolites is unknown. The aim of this study was to identify the variance and predict the plasma concentration profile of capecitabine and its metabolites, using metabolic enzyme activities, to develop a more effective and safer medication. METHODS Rats orally received 180 mg/kg of capecitabine once a day for two weeks. Blood samples were collected nine times, and plasma concentration was measured on day 1, 7, and 14. The liver and small intestine were removed after blood sampling and were used in vitro to evaluate metabolic enzyme activities of carboxylesterase, cytidine deaminase, and thymidine phosphorylase. A physiologically based pharmacokinetic (PBPK) model was developed using in vitro results. RESULTS Area under the plasma concentration-time curve from 0 h to infinity of 5-FU on day 7 and day 14 was significantly lower than that on day 1. Intrinsic clearance of thymidine phosphorylase in the liver on day 7 and day 14 was 1.4 and 1.3 times lower than that on day 1, respectively. The PBPK model described the ob

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