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Colon Cancer and Specific Ways to Deliver Drugs to the Large Intestine Publisher Pubmed



Derakhshankhah H1 ; Izadi Z1 ; Alaei L2 ; Lotfabadi A1 ; Saboury AA2 ; Dinarvand R1 ; Divsalar A3 ; Seyedarabi A2 ; Barzegari E2 ; Evini M2
Authors
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Authors Affiliations
  1. 1. Department of Pharmaceutical Biomaterials, Medical Biomaterials Research Centre, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
  3. 3. Department of Biological Sciences, Kharazmi University, Tehran, Iran

Source: Anti-Cancer Agents in Medicinal Chemistry Published:2017


Abstract

Background: It has been postulated that colon cancer is the third cause of cancer death worldwide. Recently, colon-targeted drug delivery systems have been developed for improving systemic drug delivery and treatment of local colon associated diseases. Using such drug delivery systems increases the drug’s effectiveness and results in reduced systemic side effects. Drug delivery systems formulated for the colon requires that the triggering of drug release mechanism is designed based on the colon’s physiological conditions. However, improving the site specificity and drug release kinetics of colon-targeted drug delivery systems is desired and is currently under active research. Objective: This review discusses colon cancer along with various colon-targeted drug delivery systems such as pro-drug formation, pH-sensitive polymers, hydrogels, time-dependent release systems, bio-adhesive and nanoparticle systems. The aim is to understand the effect of using colon-targeted drug delivery systems on therapeutic effectiveness of the drug by improving its degradation and bioavailability. Colon targeting holds a great promise as a therapeutic approach but it still requires more innovation. Conclusion: The distribution of the drugs in the colon suffers from problems related to the pH, retention time, micro-flora, and degrading enzymes of gastrointestinal tract. Moreover, these drug delivery systems are capable of overcoming some of the limitations in common targeting approaches. A precise assessment of such systems needs the use of various assaying protocols in order to characterize their traits and clarify their design rationales. © 2017 Bentham Science Publishers.
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