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Pharmacokinetic study of toosendanin in Toosendan Fructus extract in rats |
YU Jiaoyan WANG Qingwei SHI Lei ZHAO Jun ZHANG Ruitao ZHANG Yang XU Yuan |
Department of Pharmacy, the Second Affiliated Hospital of Air Force Medical University, Shaanxi Province, Xi′an 710038, China |
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Abstract Objective To study the pharmacokinetic characteristics of toosendanin in Toosendan Fructus in rats, through high performance liquid chromatography-mass spectrometry detection of the plasma concentration of toosendanin inrats (LC-MS/MS). Methods ZORBAX Eclipse Plus C18 (4.6 mm×100 mm, 3.5 μm) column was used as the column, acetonitrile-0.01% formate water was used as the mobile phase of the gradient elute, (0-4 min: acetonitrile 5%-55%; 4-6.5 min: acetonitrile 55%; 6.5-9 min: acetonitrile 55%-5%) and the flow rate of 0.6 mL/min, injection volume was 5 μL. The scanning mode was multi-response detection scanning (MRM), the ionization mode was electrospray ion source (ESI) and it was performed by negative ion. Twenty-four male SD rats were randomly divided into three groups according to their body weight, with 8 rats in each group. They were low dose group (15 g crude drug/kg), medium dose group (30 g crude drug/kg) and high dose group (60 g crude drug/kg). Blood was collected from the orbit at each time point after administration. After sample treatment, the pharmacokinetic parameters were calculated by DAS 2.0 software. Results The toosendanin in the range of 1.02-306 ng/mL showed good linear relationship with the peak (r = 0.9953). After the rats were given different doses of Toosendan Fructus extract, compared with the middle and low dose groups, the maximum serum concentration of high dose increased, the area under the curve, clearance rate and apparent distribution volume decreased (P < 0.05). However, there was no statistical difference between the medium dose group and the low dose group (P > 0.05). Conclusion A LC-MS/MS method for the determination of toosendanin in rat plasma is established. The method is simple, accurate and can be used for the pharmacokinetic study of toosendanin in rats plasma.
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