Injectablein situforming controlled release implant composed of a poly‐ether‐ester‐carbonate and applications in the field of chemotherapy

Abstract

Polymeric controlled delivery systems hold great promise in the field of modern medicine. Such technology has already been converted into commercially viable products in a myriad of fields. Chemotherapy is an example of such an area where constant efficacious levels of drug can greatly enhance clinical outcomes. The key to designing such therapies is the preparation of the proper delivery system. To this end, a series of bioresorbable polyether-ester-carbonate copolymers have been developed, which when combined with a diluent, are capable injection into the body and consistently forming a drug delivery depot. The study delineated here aimed at producing a more effective treatment of a common drug, paclitaxel, using the polymeric carrier. The polymer carrier system exhibited controlled release of paclitaxel both in vitro and in vivo. Drug concentrations were analyzed by high performance liquid chromatography and apoptotic activity was confirmed through flow cytometry. Relevant success was exhibited by the regression of tumor size following a multiple injection treatment regimen in a murine xenograft model. This multiple injection treatment shows promising results when compared to the traditional paclitaxel paradigm of a single injection for a period of 3 weeks.

Elastomer–Hydrogel Systems: From Bio-Inspired Interfaces to Medical Applications

“…Among various groups of polymers, thermoplastic elastomer [26], poly(ε-caprolactone) copolyesters [27], poly(ether ester elastomers such as crosslinked polyesters [29] have been develop Among various groups of polymers, thermoplastic elastomers such as polyurethanes [26], poly(ε-caprolactone) copolyesters [27], poly(ether ester)s [28] and thermoset elastomers such as crosslinked polyesters [29] have been developed for heart valves and muscle applications, skin, cartilage implants, blood vessels, vascular catheter and wound dressings [30][31][32][33][34]. Simultaneously, hydrogels which show a physicochemical similarity with ECM and provide high-water content are considered as highly biocompatible materials.…”

Elastomer-Hydrogel Systems: From Bio-Inspired Interfaces to Medical Applications

“…Among various groups of polymers, thermoplastic elastomers such as polyurethanes [26], poly(εcaprolactone) copolyesters [27], poly(ether ester)s [28] and thermoset elastomers such as crosslinked polyesters [29] have been developed for heart valves and muscles applications, skin, cartilage implants, blood vessels, vascular catheter and wound dressings [30][31][32][33][34]. Simultaneously, hydrogels which show physico-chemical similarity with ECM and provide high-water content are considered as highly biocompatible materials.…”

Bio-Inspired Polymer-Polymer Hybrids for Medical Applications

“…Among various groups of polymers, bioelastomers have been developed for medical applications. Both thermoplastic elastomers such as polyurethanes [18], poly(ε-caprolactone) copolyesters [19], poly(ether ester)s [20] and thermoset elastomers such as crosslinked polyesters [21] have been developed for heart valves and muscles applications, skin, cartilage implants, blood vessels, vascular catheter and wound dressings. Simultaneously, hydrogels show physico-chemical similarity with ECM and provide high-water content are considered as highly biocompatible materials.…”