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Related Concept Videos

Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...

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Jae-Hoon Lee1, Won-Shik Ha, Won-Shik Chu

  • 1College of Pharmacy, Sungkyunkwan University, Suwon 440-746, Korea.

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|February 19, 2008
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This study shows that nano-composite deposition system (NCDS) can create poly(lactic-co-glycolic acid) (PLGA) scaffolds. Adding hydroxyapatite (HA) to these scaffolds enhances drug release and mechanical strength.

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Drug Delivery Systems

Background:

  • Poly(lactic-co-glycolic acid) (PLGA) scaffolds are widely used in tissue engineering and drug delivery.
  • Controlling drug release and mechanical properties of PLGA scaffolds remains a challenge.
  • Hydroxyapatite (HA) is a bioceramic with potential to enhance scaffold properties.

Purpose of the Study:

  • To prepare PLGA scaffolds incorporating hydroxyapatite (HA) using a nano-composite deposition system (NCDS).
  • To investigate the effect of HA on the mechanical properties and drug release profile of 5-Fluorouracil (5-FU) from PLGA scaffolds.
  • To evaluate the suitability of NCDS for fabricating customized polymeric implants.

Main Methods:

  • PLGA scaffolds loaded with 5-Fluorouracil (5-FU) and varying amounts of Hydroxyapatite (HA) were fabricated using NCDS.
  • Scaffold characterization included Scanning Electron Microscopy (SEM), Fourier-Transform Infrared Spectroscopy (FT-IR), X-ray Powder Diffraction (XRPD), and Differential Scanning Calorimetry (DSC).
  • In vitro drug release studies were conducted using Phosphate-Buffered Saline (PBS) as the release medium.

Main Results:

  • SEM, FT-IR, XRPD, and DSC confirmed the successful and uniform dispersion of 5-FU and HA within the PLGA scaffolds.
  • The release of 5-FU from the PLGA scaffolds exhibited a typical triphasic release pattern.
  • Incorporation of HA increased the 5-FU release rate and improved the mechanical properties of the scaffolds.
  • HA addition also retarded the degradation of the PLGA matrix.

Conclusions:

  • NCDS is an effective system for preparing PLGA scaffolds with tunable mechanical properties and drug release profiles.
  • The inclusion of HA in PLGA scaffolds offers a promising strategy for enhancing drug delivery and scaffold performance.
  • NCDS holds potential for fabricating polymeric implants with tailored characteristics for various biomedical applications.