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Abstract

COLON TARGETED MICROBEADS: A NOVEL APPROACH IN NDDS

Piyush S. Mahajan*, Girish S. Vispute, Anil P. Palhal, Dr Surajj Sarode, and Dr. Shashikant Barhate

ABSTRACT

In oral colon-specific drug delivery system, colon has a large amount of lymphoma tissue (facilitates direct absorption in to the blood), negligible brush boarder membrane activity, and much less pancreatic enzymatic activity as compared with the small intestine. Colon-specific drug delivery has gained increased importance not just for the delivery of the drugs for treatment of local diseases associated with the colon but also for its potential for the delivery of proteins and therapeutic peptides. Different approaches are designed based on prodrug formulation, pH-sensitivity, time-dependency (lag time), microbial degradation and osmotic pressure etc to formulate the different dosage forms like tablets, capsules, multiparticulates, microspheres, microbeads, liposome for colon targeting. The efficiency of drug delivery system is evaluated using different in vitro and in vivo release studies. This review updated the research on different approaches for formulation and evaluation of colon-specific drug delivery systems (CDDS).

Keywords: Colon Specific Drug Delivery System, Microbial Degradation, Osmotic Pressure, pH-sensitivity, Prodrug, Time Dependency.


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