[UPLC-MS/MS determination of tanshinone ⅡA, salvianolic acid B and ginsenoside Rg₁ in Fufang Danshen preparation in rat plasma and brain tissues].

A sensitive and specific ultra-performance liquid chromatography-mass spectrometry (UPLC-MS/MS) method was developed for analysis of tanshinone ⅡA(TSⅡA), salvianolic acid B(SAB) and ginsenoside Rg₁ (GRg₁) in rat plasma and brain tissues. Male healthy Sprague-Dawley(SD) rats were orally given single dose of Fufang Danshen preparation (TS ⅡA 60 mg•kg⁻¹, SAB 300 mg•kg⁻¹, GRg₁ 150 mg•kg⁻¹, borneol 300 mg•kg⁻¹), and their blood samples and brain tissues were collected at different time points. The drug plasma and brain tissue concentrations of the three analytes were determined by UPLC-MS/MS method. Subsequently, the main pharmacokinetics parameters of plasma and brain tissues were calculated by using Phoenix WinNolin 6.1 software. The methodological test showed that all of analytes in both plasma and brain homogenate exhibited a good linearity within the concentration range(r>0.992 2). Their mean recoveries were between 58.86% and 112.1%. Intra-day and inter-day precisions of the investigated components exhibited RSD≤9.7%, and the accuracy(RE) ranged from -9.68% to 8.20% at all quality control levels. The results of accuracy and stability meet the requirements for biopharmaceutical analysis. For TSⅡA, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the plasma were (1.58±0.081) h, (725.4±88.20) μg•L⁻¹, (2 101.3±124.85) μg•h•L⁻¹ and (3.66±0.05) h, respectively. For SAB, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the plasma were (1.29±0.21) h, (307.9±46.75) μg•L⁻¹, (537.4±88.24) μg•h•L⁻¹ and (2.08±0.11) h, respectively. For GRg₁, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the plasma were (1.42±0.20) h, (460.38±154.60) μg•L⁻¹, (383.4±88.16) μg•h•L⁻¹ and (1.87±0.046) h, respectively. For TSⅡA, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the brain tissue were (0.75±0.22) h, (1.41±0.42) ng•g⁻¹, (4.34±2.48) ng•h•g⁻¹ and (4.00±1.90) h, respectively. For SAB, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the plasma were (1.08±0.20) h, (21.09±4.850) ng•g⁻¹, (14.83±3.160) ng•h•g⁻¹ and (0.99±0.08) h, respectively. For GRg₁, the pharmacokinetics parameters Tmax, Cmax, AUC0-t, MRTlast in the plasma were (0.50±0.16) h, (130.96±54.220) ng•g⁻¹, (136.24±34.350) ng•h•g⁻¹ and (2.87±0.33) h, respectively. The developed method was successfully applied in pharmacokinetic studies on content of TS ⅡA, SAB and GRg₁ in rat plasma and brain tissues.