The development and validation of a sensitive HPLC-MS/MS method for the quantitative and pharmacokinetic study of the seven components ofBuddleja lindleyanaFort.

Abstract

Buddleja lindleyanaFort., a traditional Chinese medicine, has demonstrated anti-inflammatory, immunomodulatory, antidementia, neuroprotective, antibacterial, and antioxidant effects. Its flowers, leaves, and roots have been used as traditional Chinese medicines. A simple and rapid high-performance liquid chromatography method coupled with mass spectrometry (HPLC-MS/MS) was applied in the multicomponent determination ofBuddleja lindleyanaFort., and the discrepancies in the contents from ten different habitats were analyzed. The present study simultaneously determined the concentrations of seven chemical compounds ofBuddleja lindleyanaFort. extract in rat plasmaviaHPLC-MS/MS, which was applied in the pharmacokinetic (PK) study ofBuddleja lindleyanaFort. A C18 column was used for chromatographic separation, and ion acquisition was achieved by multiple-reaction monitoring (MRM) in negative ionization mode. The optimized mass transition ion-pairs (m/z) for quantization were 591.5/282.8 for linarin, 609.4/300.2 for rutin, 284.9/133.0 for luteolin, 300.6/151.0 for quercetin, 268.8/116.9 for apigenin, 283.0/267.9 for acacetin, 623.3/160.7 for acteoside, and 252.2/155.8 for sulfamethoxazole (IS). A double peak appeared in the drug-time curve of apigenin, which was associated with entero-hepatic recirculation. There were discrepancies in the contents of seven chemical compounds from 10 batches ofBuddleja lindleyanaFort., which were associated with the growth environments. Herein, the pharmacokinetic parameters of seven analytes inBuddleja lindleyanaFort. extract are summarized. The maximum plasma concentration (Cmax) of linarin, rutin, luteolin, quercetin, apigenin, acacetin and acteoside were 894.12 ± 9.34 ng mL−1, 130.76 ± 18.33 ng mL−1, 77.37 ± 25.72 ng mL−1, 20.15 ± 24.85 ng mL−1, 146.42 ± 14.88 ng mL−1, 31.92 ± 17.58 ng mL−1, and 649.78 ± 16.42 ng mL−1, respectively. The time to reachCmaxfor linarin, rutin, luteolin, quercetin, apigenin, acacetin, and acteoside were 10, 5, 5, 5, 180, 10 and 10 min, respectively. This is the first report on the simultaneous determination of seven active components for 10 different growing environments and the pharmacokinetic studies of seven active components in rat plasma after the oral administration ofBuddleja lindleyanaFort. extract. This study lays the foundation for a better understanding of the absorption mechanism ofBuddleja lindleyanaFort., and the evaluation of its clinical application.