Salidroside shows a particular pharmacokinetic property in model rats of myocardial ischemia

Objective: Salidroside showed potential pharmacological effect on plateau hypoxia and cardiovascular disease like myocardial ischemia. However, pharmacokinetic differences have not been assessed between the pathological model and the normal animals. This study focused on evaluating the pharmacokinetic properties of salidroside in animals with myocardial ischemia. Methods: A reproducible and sensitive method was established and optimized based on liquid chromatography tandem mass spectrometry (LC-MS/MS) to determine salidroside in rats plasma. The data showed the AUC(0-infinity) and C-max of salidroside proportionally increased along with dose elevation after singly intragastric administration of salidroside at a dose of 20, 50, and 100 mg/kg. Results: Compared to the single dose, the C-max, and AUC(0-8h) of salidroside markedly decreased while CL/F and V/F increased after multiple dosing. However, the C-max, and AUC(0-8h) of ischemic model rats were 0.35 and 0.39 fold lower than those in normal rats after a single dose at 50 mg/kg, with an increased CL/F and V/F. Surprisingly, after a consecutive administration of salidroside for 7 d, the mean C-max, AUC(0-8h) increased 2.89 and 2.61 fold higher than a single dose in model rats, and even 2.28 and 4.03 fold higher than the normal controls after multiple doses. All the above fold values were statistically different (P < 0.01). Conclusion: The particular PK properties of salidroside in ischemic model rats were presented in our study for the first time, suggesting that myocardial ischemia greatly affected pharmacokinetics exposure of the orally administrated salidroside after a single or multiple doses. (C) 2018 Tianjin Press of Chinese Herbal Medicines. Published by Elsevier B.V. All rights reserved.