Pharmacokinetics of alliin in rat / 中成药

ABSTRACT

AIM: To develop an HPLC method for determintion of alliin concentration in rat plasma and to study its pharmacokinetics in rat. METHODS: The plasma samples were extracted with methanol. The analysis involved a ODS-1 column as stationary phase and distilled water as mobile phase. The flow rate was 0.5mL?min -1 ,UV detection wavelength was at 220nm. 5-fluorouracil was used as the internal standard. RESULTS: The calibration curve was linear over the range from 3?g?mL -1 to 75?g?mL -1 with a correlation coefficient of 0.9989 . The mean recovery was 95%. The RSD of within-day and between-day were all less than 5%. The HPLC method of determination of alliin in the plasma was established. After single dose of 300mg?mL -1 in 6 rat,the main pharmacokinetic parameters were estimated to be as follows CL( 0.048 )mg?min -1 ?kg -1 ,K_ 12 ( 0.0071 )min -1 ,K_ 21 ( 0.0093 )min -1 ,K_a(0.1915)min -1 ,t_ 1/2? ( 26.85 )min -1 ,t_ 1/2? ( 131.15 )min -1 , AUC( 6228.48 )?g?min -1 ?mL -1 . CONCLUSION: This method is quick,precise and reliable. It is shown that alliin is absorbed quickly in rat.