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- W1989745962 abstract "A simple and accurate high-performance liquid chromatography (HPLC) method was developed to measure levels of N-(4-hydroxyphenyl)retinamide (fenretinide, 4-HPR) and its main metabolite N-(4-methoxyphenyl)retinamide (4-MPR) in tissue. Following ultrasonic extraction of fresh tissue in acetonitrile (ACN), 4-HPR and 4-MPR were measured by HPLC with UV absorbance detection at 340 nm, using isocratic elution with ACN, H(2)O, and acetic acid. N-(4-ethoxyphenyl)retinamide (4-EPR) was employed as an internal standard. The 4-HPR and 4-MPR recovery in bovine liver or bovine brain tissue samples spiked with known amounts of 4-HPR and 4-MPR ranged from 93 to 110%. The detection limit of the method was 50 ng/ml. The method was tested on actual samples from an athymic (nu/nu) mouse carrying a subcutaneous tumor xenograft originating from SMS-KCNR neuroblastoma cells. The tissues were harvested and analyzed following a 3 day long treatment with intraperitoneal injections of 4-HPR/Diluent-12. 4-HPR and the metabolite 4-MPR were detected and quantitated in the tested tissues including tumor, liver, and brain. This method can be used to quantify 4-HPR and 4-MPR in different tissues to determine the bioavailability of 4-HPR." @default.
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- W1989745962 date "2004-09-01" @default.
- W1989745962 modified "2023-10-16" @default.
- W1989745962 title "Liquid chromatography method for quantifying N-(4-hydroxyphenyl)retinamide and N-(4-methoxyphenyl)retinamide in tissues" @default.
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- W1989745962 doi "https://doi.org/10.1016/j.jchromb.2004.02.031" @default.
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