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Related Experiment Videos

Polymeric microspheres composed of pH/temperature-sensitive polymer complex.

E J Kim1, S H Cho, S H Yuk

  • 1Advanced Materials Division, Korea Research Institute of Chemical Technology, Yusung, Taejeon, South Korea.

Biomaterials
|August 23, 2001
PubMed
Summary
This summary is machine-generated.

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A novel polymer system using poly(N,N-dimethylamino)ethyl methacrylate (DMAEMA) and polyethyl acrylamide (EAAm) enables controlled drug release. This pH/temperature-sensitive material offers on-off hydrocortisone delivery with minimal delay.

Area of Science:

  • Polymer Science
  • Materials Science
  • Drug Delivery Systems

Background:

  • Developing smart materials for targeted drug delivery is crucial.
  • pH and temperature-sensitive polymers offer tunable release profiles.
  • Existing systems may have limitations in responsiveness or lag time.

Purpose of the Study:

  • To create a dual pH/temperature-sensitive polymer system.
  • To design and characterize microspheres for controlled drug release.
  • To evaluate the release kinetics of hydrocortisone from the developed system.

Main Methods:

  • Synthesized a polymer mixture of poly(N,N-dimethylamino)ethyl methacrylate (DMAEMA) and polyethyl acrylamide (EAAm).
  • Fabricated drug-loaded microspheres using the polymer system.

Related Experiment Videos

  • Characterized microsphere properties and performed drug release studies under varying pH and temperature conditions.
  • Utilized hydrocortisone as a model drug for release evaluation.

    • Main Results:

    • The polymer system exhibited transitions due to both polymer-water and polymer-polymer interactions.
    • Microspheres demonstrated pH/temperature-sensitive release behavior.
    • Controlled on-off release of hydrocortisone was achieved.
    • Release occurred without a considerable lag time.

    Conclusions:

    • The DMAEMA/EAAm polymer mixture forms an effective pH/temperature-sensitive system.
    • Microspheres derived from this system are suitable for controlled drug delivery.
    • The system allows for precise, on-off release of hydrocortisone, minimizing delays.