5-Heptadecylresorcinol
(AR-C17), as the most important active monomer,
is found in large quantities in wheat and triticale and plays a variety
of health benefits, such as antidiabetic, anti-inflammatory, and antitumor.
However, the low bioavailability of AR-C17 due to its low water solubility
restricts its application. Moreover, the transport mechanism of AR-C17
is not fully understood. Here, we showed that the transport of AR-C17
in vitro was time- and concentration-dependent, and relatively higher
temperature and lower pH obviously promoted the transport of AR-C17.
Besides, transporters, especially P-glycoprotein (P-gp), markedly
affected the transport of AR-C17 as well. Quercetin, a natural synergist
in triticale bran (TB), was confirmed as an inhibitor of P-gp to promote
the transport of AR-C17 in this study, and the bioavailability of
AR-C17 reached the highest when the concentration ratio of quercetin
to AR-C17 was 1:1.