In this article , a review of research in the colon specific drug delivery based on azo polymers in which azo groups are located in the main chain, cross links, or in branches, is given.

• 在人体消化道中,偶氮键仅能被结肠厌氧菌代谢的偶氮还原酶还原而断裂,偶氮聚合物可作为潜在的高定位性的结肠靶向药物缓释载体。