PMID- 23010479 OWN - NLM STAT- MEDLINE DCOM- 20130215 LR - 20121012 IS - 1873-376X (Electronic) IS - 1570-0232 (Linking) VI - 907 DP - 2012 Oct 15 TI - Analysis of daidzein in nanoparticles after oral co-administration with sodium caprate to rats by ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry. PG - 21-6 LID - S1570-0232(12)00498-9 [pii] LID - 10.1016/j.jchromb.2012.08.026 [doi] AB - An ultra-performance-liquid-chromatography-quadrupole-time-of-flight mass spectrometry (UPLC/Q-TOF-MS) method was developed and validated for the quantitation of daidzein (DZ) in rat plasma. Ethylparaben was chosen as internal standards (IS). DZ was linear over the range of 0.001-5 mug/mL. The lower limit of quantification (LLOQ) was 0.001 mug/mL and the limit of detection (LOD) was 0.0005 mug/mL. The intra-day and inter-day relative standard deviations (RSDs) were ranged from 3.59% to 6.43% and 5.35% to 7.25%, respectively. This UPLC/Q-TOF-MS method provided good specifity, highly sensitivity, accurate and high-speed detection (6 min), applicable to the pharmacokinetics study in rats in vivo after oral administration of free daidzein solution, daidzein-loaded poly (lactide-co-glycolide) (PLGA) nanoparticles (D-NPs) suspension and D-NPs co-administered with sodium caprate (C(10)) which as the oral absorption promoter. It was shown that the pharmacokinetics behavior was significantly improved after the oral administration of D-NPs suspension co-administered with absorption promoter C(10) by the fact that the relative bioavailability were enhanced about 4.24-fold, compared to that of DZ suspension. CI - Copyright (c) 2012 Elsevier B.V. All rights reserved. FAU - Ma, Yiran AU - Ma Y AD - School of Pharmacy, Shanghai Jiao Tong University, Shanghai 200240, China. FAU - Zhang, Li AU - Zhang L FAU - Zhao, Xinyi AU - Zhao X FAU - Shen, Qi AU - Shen Q LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20120910 PL - Netherlands TA - J Chromatogr B Analyt Technol Biomed Life Sci JT - Journal of chromatography. B, Analytical technologies in the biomedical and life sciences JID - 101139554 RN - 0 (Decanoic Acids) RN - 0 (Isoflavones) RN - 4G9EDB6V73 (decanoic acid) RN - 6287WC5J2L (daidzein) SB - IM MH - Administration, Oral MH - Animals MH - Chromatography, High Pressure Liquid/*methods MH - Decanoic Acids/*administration & dosage/pharmacokinetics MH - Drug Stability MH - Isoflavones/administration & dosage/*blood/pharmacokinetics MH - Linear Models MH - Male MH - Mass Spectrometry/*methods MH - Nanoparticles/*administration & dosage/chemistry MH - Rats MH - Rats, Sprague-Dawley MH - Reproducibility of Results MH - Sensitivity and Specificity EDAT- 2012/09/27 06:00 MHDA- 2013/02/16 06:00 CRDT- 2012/09/27 06:00 PHST- 2012/02/06 00:00 [received] PHST- 2012/08/21 00:00 [revised] PHST- 2012/08/23 00:00 [accepted] PHST- 2012/09/27 06:00 [entrez] PHST- 2012/09/27 06:00 [pubmed] PHST- 2013/02/16 06:00 [medline] AID - S1570-0232(12)00498-9 [pii] AID - 10.1016/j.jchromb.2012.08.026 [doi] PST - ppublish SO - J Chromatogr B Analyt Technol Biomed Life Sci. 2012 Oct 15;907:21-6. doi: 10.1016/j.jchromb.2012.08.026. Epub 2012 Sep 10.