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- W2035841100 abstract "Paclitaxel is an anticancer agent extracted from the bark of the yew tree and is widely used in chemotherapy for solid tumors, including non-small cell lung cancer and ovarian carcinoma. Most assays to measure paclitaxel in plasma require a large amount of sample (0.4-1 ml) to achieve the necessary sensitivity, and are not suitable when only small sample sizes are available. To circumvent this latter limitation, we developed a sensitive liquid chromatography-mass spectrometry (LC-MS) method for the determination of paclitaxel in plasma based on the use of small sample volumes (50 microl plasma). A solid phase extraction procedure was employed that enabled the eluent to be directly injected onto a reversed phase chromatographic HPLC system using positive electrospray ionization followed by mass spectrometric detection. The extraction recoveries of paclitaxel were 98 and 83% from plasma and brain tissues, respectively. The mobile phase consisted of 50% acetonitrile in 0.1% formic acid that was pumped at 0.2 ml/min to yield a retention time for paclitaxel of 6.2 and 5.4 min for cephalomannine, the internal standard. The method has been validated at paclitaxel plasma concentrations from 0.036 to 9.9 microg/ml, and from 0.054 to 1.96 microg/ml in brain homogenates. A sensitive and specific assay for paclitaxel has been developed that has the advantages of using small sample sizes, and a single extraction step without solvent evaporation." @default.
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- W2035841100 date "2003-12-01" @default.
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- W2035841100 title "Determination of paclitaxel in mouse plasma and brain tissue by liquid chromatography–mass spectrometry" @default.
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- W2035841100 doi "https://doi.org/10.1016/j.jchromb.2003.08.049" @default.
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