Intestinal Absorption of Ergostane and Lanostane Triterpenoids from Antrodia cinnamomea Using Caco-2 Cell Monolayer Model

Abstract

Antrodia cinnamomea is a precious medicinal mushroom. It exhibits promising therapeutic effects on cancer, intoxication, hypertension, hepatitis, and inflammation. Its major bioactive constituents are ergostane and lanostane triterpenoids. In this study, we used intestinal Caco-2 cell monolayer model to reveal the intestinal absorption property of 14 representative triterpenoids from A. cinnamomea. The bidirectional transport through the monolayer at different time points was monitored by a fully validated LC/MS/MS method. In the case of pure compounds, ergostanes 5 (25R-antcin H), 6 (25S-antcin H) and 10 (25R-antcin B) could readily pass through the Caco-2 cell layer, whereas lanostanes 13 (dehydroeburicoic acid) and 14 (eburicoic acid) could hardly pass through. When the cells were treated with A. cinnamomea extract, antcins A, B, C, H and K (1-6 and 9-11) were absorbed via passive transcellular diffusion, and showed high P AB and P BA values (> 2.5 × 10(-5) cm/s). Meanwhile, the lanostanes dehydrosulphurenic acid (8), 15α-acetyldehydrosulphurenic acid (12), 13 and 14 exhibited poor permeability. Transport features of these compounds were consistent with their pharmacokinetic behaviors in rats. This study could also be helpful in predicting the intestinal absorption of A. cinnamomea in human.

Figures

Fig. 1

Chemical structures of 14 triterpenoids…

Fig. 1

Chemical structures of 14 triterpenoids used in this study. 25 S -antcin K…

Fig. 1 Chemical structures of 14 triterpenoids used in this study. 25S-antcin K (1), 25R-antcin K (2), 25S-antcin C (3), 25R-antcin C (4), 25R-antcin H (5), 25S-antcin H (6), 3β,15α-dihydroxylanosta-7,9(11),24-triene-21-oic acid (7), dehydrosulphurenic acid (8), 25S-antcin B (9), 25R-antcin B (10), (R/S)-antcin A (11), 15α-acetyldehydrosulphurenic acid (12), dehydroeburicoic acid (13), eburicoic acid (14)

Fig. 2

EIC chromatograms of 14 triterpenoids…

Fig. 2

EIC chromatograms of 14 triterpenoids in A. cinnamomea extract and in basolateral side…

Fig. 2 EIC chromatograms of 14 triterpenoids in A. cinnamomea extract and in basolateral side at 150 min by LC/MS/MS analysis

Fig. 3

The apparent permeability coefficients (…

Fig. 3

The apparent permeability coefficients ( a ) and transport rates ( b )…

Fig. 3 The apparent permeability coefficients (a) and transport rates (b) of 5, 6 and 10, and LC/MS/MS chromatograms of 5/6 in A. cinnamomea extract and in basolateral side (c)

Fig. 4

The apparent permeability coefficients of…

Fig. 4

The apparent permeability coefficients of 1 – 14 in A. cinnamomea extract

Fig. 4 The apparent permeability coefficients of 1–14 in A. cinnamomea extract

Fig. 5

Time-transport rate curves of 1…

Fig. 5

Time-transport rate curves of 1 – 7 and 9 – 11 in A.…

Fig. 5 Time-transport rate curves of 1–7 and 9–11 in A. cinnamomea extract