Promising Polymeric Drug Carriers for Local Delivery: The Case of in situ Gels.

Current Drug Delivery
Neslihan Üstündağ OkurPanoraia I Siafaka

Abstract

At present, the controlled local drug delivery is a very promising approach compared to systemic administration, since it mostly targets the affected tissue. In fact, various drug carriers for local delivery have been prepared with improved therapeutic efficacy. in situ polymer gels are drug delivery systems that not only present liquid characteristics before their administration in body, but once they are administered, form gels due to gelation. Their gelation mechanism is due to factors such as pH alteration, temperature change, ion activation or ultraviolet irradiation. in situ gels offer various advantages compared to conventional formulations due to their ability to release drugs in a sustainable and controllable manner. Most importantly, in situ gels can be used in local drug delivery applications for various diseases. This review includes the basic knowledge and theory of in situ gels as well as their various applications according to their administration route. Various natural, semisynthetic, and synthetic polymers can produce in situ polymeric gels. For example, natural polysaccharides such as alginic acid, chitosan, gellan gum, carrageenan etc. have been utilized as in situ gels for topical delivery. Besides the polys...Continue Reading

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Citations

Nov 23, 2021·Therapeutic Delivery·Shreshtha DashAlekha K Dash

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