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Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
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Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
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Cyclodextrin-modified poly(octamethylene citrate) polymers towards enhanced sorption properties.

Wiktor Kasprzyk1, Szczepan Bednarz1, Dariusz Bogdał1

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Biodegradable elastomers modified with cyclodextrins show enhanced drug absorption and prolonged release. These cPOCCD materials offer improved drug delivery potential compared to unmodified polyesters.

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Biomedical Engineering

Background:

  • Biodegradable polyesters are crucial for drug delivery applications.
  • Current materials often face challenges with drug loading efficiency and release kinetics.
  • Incorporating cyclodextrins can enhance material properties for drug encapsulation.

Purpose of the Study:

  • To synthesize and characterize novel biodegradable elastomers.
  • To investigate the impact of 2-hydroxypropyl-β-cyclodextrin incorporation on material properties.
  • To evaluate the drug loading and release performance of the modified elastomers for drug delivery.

Main Methods:

  • Synthesis of poly(1,8-octamethylene citrate) modified with 2-hydroxypropyl-β-cyclodextrin (cPOCCD).
  • Chemical structure analysis and physicochemical property evaluation.
  • In vitro drug loading and release studies using selected model drugs.

Main Results:

  • Successful synthesis of cPOCCD biodegradable elastomers.
  • Demonstrated intrinsic sorption properties of cPOCCD materials.
  • cPOCCD showed significantly higher drug absorption and prolonged drug release compared to unmodified poly(1,8-octamethylene citrate).

Conclusions:

  • cPOCCD represents a promising class of biodegradable elastomers for drug delivery.
  • The incorporation of cyclodextrins enhances drug sorption and controlled release capabilities.
  • These findings suggest potential for improved therapeutic efficacy through advanced drug delivery systems.