Methods of modifying therapeutic compounds such as drugs to be substrates for active transporters expressed in epithelial cells lining the lumen of the human colon are disclosed. The transporters expressed in the human colon include the sodium dependent multi-vitamin transporter (SMVT), and monocarboxylate transporters 1 and 4 (MCT 1 and MCT 4). The modified compounds can themselves be pharmacologically active, or upon cleavage of a chemical moiety after uptake from the colon, can be metabolized to form a compound that is pharmacologically active (e.g., a prodrug). The modified compounds disclosed herein are suitable for use in extended release oral dosage forms, particularly those that release drug over periods of greater than about 2-4 hours following administration.
本文披露了一种改变治疗化合物(如药物)成为表皮细胞在人类结肠腔内表达的活性转运蛋白底物的方法。在人类结肠中表达的转运蛋白包括依赖
钠的多
维生素转运蛋白(SMVT)和单
羧酸转运蛋白1和4(
MCT 1和
MCT 4)。改变后的化合物本身可以具有药理活性,或者在从结肠摄取后分解
化学基团后可以代谢成为具有药理活性的化合物(例如,前药)。本文披露的改变后的化合物适用于延长释放口服剂型,特别是在给药后释放药物超过约2-4小时的剂型。