LOU Hua-wei, LI Ling-jun, LI Ji. Studies on Absorption Kinetics of Rhynchophylline and Isorhynchophylline of Tiangou Jiangya Capsules in Rats' Intestinal[J]. Chinese journal of experimental traditional medical formulae, 2013, 19(7): 150-153.
LOU Hua-wei, LI Ling-jun, LI Ji. Studies on Absorption Kinetics of Rhynchophylline and Isorhynchophylline of Tiangou Jiangya Capsules in Rats' Intestinal[J]. Chinese journal of experimental traditional medical formulae, 2013, 19(7): 150-153. DOI: 10.11653/zgsyfjxzz2013070150.
Objective: To study the absorption kinetics of active components which was rhynchophylline and isorhynchophylline of Tiangou Jiangya capsules in rat's intestinal. Method: Using an improved rat everted gut sac model
rhynchophylline concentration and isorhynchophylline concentration were determined by HPLC. The concentration of cumulative absorption amount was calculated. The linear regression equation was figured through the concentration of cumulative absorption amount and time. The parameters were calculated. Result: The regression equation of rhynchophylline was Y=0.000 9X-0.008 5(r=0.908 6)
Ka=9.0×10-4μg·min-1·cm-2
t1/2=12.8 h; the regression equation of isorhynchophylline is Y=0.008 6X-0.178 2(r=0.909 0)
Ka=8.6×10-3μg·min-1·cm-2
t1/2=1.34 h. Conclusion: The absorption of rhynchophylline and isorhyncho-phylline conforms to the first-order kinetics in rats' intestine.