Zhang Guoliang, Yu Huanhuan, Xu Jing, Wang Xiaotong, Wang Ying, Yang Jihong
Objective: To compare the pharmacokinetic differences of a total of 9 ganoderic acids(Ganoderic acid C2, C6, G, B, A, D2, C1, Luwdenic acid A and Gancderenic acid D) in rats after multiple administrations of sporoderm-broken and sporoderm-removed Ganoderma lucidum spore powder. Methods: Normal SD rats were randomly divided into sporoderm-broken G. lucidum spore powder group, sporoderm-removed G. lucidum spore powder high-dose group and low-dose group with 6 rats in each group, and were administered orally for 7 consecutive days, blood was taken from the inner canthus of the eye on the 7th day at 0, 0.1, 0.2, 0.5, 1, 2, 3, 4, 6, and 12 h. Blood concentration was determined by UPLC-MS/MS, and the pharmacokinetic parameters were calculated by Winnonlin 8.1 pharmacokinetic software. Results: In the sporoderm-removed G. lucidum spore powder group, the time to peak (Tmax) of 9 ganoderic acids was around 1 h, the half-life (t1/2) was less than 6 h, and the accumulation factor (Rac) was around 1.00, whereas no ganoderic acid was detected in the sporoderm-broken G. lucidum spore powder group. Compared with the sporoderm-removed G. lucidum spore powder low-dose group, the maximum concentrations (Cmax) of 9 ganoderic acids in the high-dose group was significantly higher (P < 0.05 or P < 0.01), and the mean area under the blood concentration-time curve (AUC0-t) was higher than that of the low-dose group by about 10-40 times. Conclusion: Sporoderm-removed G. lucidum spore powder maintains rapid absorption after multiple administrations, with no significant accumulation observed. Its bioavailability is significantly superior to that of sporoderm-broken spore powder, and it exhibits distinct dose dependency.