PMID- 25714369 OWN - NLM STAT- MEDLINE DCOM- 20160118 LR - 20221207 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 10 IP - 2 DP - 2015 TI - Pharmacokinetic study of 14-(3-methylbenzyl)matrine and 14-(4-methylbenzyl)matrine in rat plasma using liquid chromatography-tandem mass spectrometry. PG - e0116010 LID - 10.1371/journal.pone.0116010 [doi] LID - e0116010 AB - A rapid, sensitive and selective high-performance liquid chromatography-tandem mass spectrometric method (HPLC-MS) was developed and validated to determine the 14-(3-methylbenzyl)matrine (3MBM) and 14-(4-methylbenzyl)matrine (4MBM) levels in rat plasma in the present study. The analytes were separated using a C18 column (1.9 mum, 2.1 mm x 100 mm) equipped with a Security Guard C18 column (5 mum, 2.1 mm x 10 mm), followed by detection via triple-quadrupole mass spectrometry using an electrospray ionization (ESI) source. Sample pretreatment involved one-step protein precipitation with isopropanol:ethyl acetate (v/v, 25:75), and pseudoephedrine hydrochloride was used as an internal standard. The method was linear in the concentration range of 5-2000 ng/ml for both compounds. The intra-day and inter-day relative standard deviations (RSDs) were less than 15%, and all relative errors (REs) were within 15%. The proposed method enables the unambiguous identification and quantification of these two compounds in vivo. This study is the first to determine the 3MBM and 4MBM levels in rat plasma after oral administration of these compounds. These results provide a meaningful basis for evaluating the clinical applications of these medicines. FAU - Jiang, Minjie AU - Jiang M AD - School of Chemistry and Chemical Engineering, Guangxi University, 100 Daxue Road, Nanning, 530004, China. FAU - Wang, Lisheng AU - Wang L AD - School of Chemistry and Chemical Engineering, Guangxi University, 100 Daxue Road, Nanning, 530004, China. FAU - Huang, Shulin AU - Huang S AD - School of Pharmaceutical, Guangxi Medical University, Nanning 530021, China. FAU - Xu, Liba AU - Xu L AD - School of Pharmaceutical, Guangxi Medical University, Nanning 530021, China. FAU - Hu, Chao AU - Hu C AD - School of Pharmaceutical, Guangxi Medical University, Nanning 530021, China. FAU - Jiang, Weizhe AU - Jiang W AD - School of Pharmaceutical, Guangxi Medical University, Nanning 530021, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150225 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Alkaloids) RN - 0 (Quinolizines) RN - 0 (Matrines) SB - IM MH - Alkaloids/administration & dosage/chemistry/*pharmacokinetics MH - Animals MH - *Chromatography, Liquid MH - Drug Stability MH - Male MH - Molecular Structure MH - Quinolizines/administration & dosage/chemistry/*pharmacokinetics MH - Rats MH - Reproducibility of Results MH - Sensitivity and Specificity MH - *Tandem Mass Spectrometry MH - Matrines PMC - PMC4340794 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2015/02/26 06:00 MHDA- 2016/01/19 06:00 PMCR- 2015/02/25 CRDT- 2015/02/26 06:00 PHST- 2014/09/22 00:00 [received] PHST- 2014/12/03 00:00 [accepted] PHST- 2015/02/26 06:00 [entrez] PHST- 2015/02/26 06:00 [pubmed] PHST- 2016/01/19 06:00 [medline] PHST- 2015/02/25 00:00 [pmc-release] AID - PONE-D-14-42720 [pii] AID - 10.1371/journal.pone.0116010 [doi] PST - epublish SO - PLoS One. 2015 Feb 25;10(2):e0116010. doi: 10.1371/journal.pone.0116010. eCollection 2015.