Related Experiment Video

Updated: Jul 18, 2026

Immobilization of Multi-biocatalysts in Alginate Beads for Cofactor Regeneration and Improved Reusability
09:27

Immobilization of Multi-biocatalysts in Alginate Beads for Cofactor Regeneration and Improved Reusability

Published on: April 22, 2016

In vivo release of vancomycin from biodegradable beads

Shih-Jung Liu1, Steve Wen-Neng Ueng, Song-Shu Lin

  • 1Department of Mechanical Engineering, Chang Gung University, Tao-Yuan, Taiwan.

Journal of Biomedical Materials Research
|November 6, 2002
PubMed

Insights

Biodegradable antibiotic beads offer a promising alternative to non-degradable polymethylmethacrylate (PMMA) beads for osteomyelitis treatment. These novel beads provide sustained drug release, potentially eliminating the need for a second surgical removal.

Area of Science:

  • Biomaterials Science
  • Infectious Disease Treatment
  • Drug Delivery Systems

Background:

  • Current osteomyelitis treatment relies on non-biodegradable polymethylmethacrylate (PMMA) beads for local antibiotic delivery.
  • The non-biodegradable nature of PMMA necessitates a second surgery for bead removal, increasing patient burden and healthcare costs.

Purpose of the Study:

  • To investigate the efficacy of biodegradable polymers as antibiotic beads for sustained in vivo drug release.
  • To evaluate the potential of biodegradable antibiotic beads as an alternative to PMMA for treating osteomyelitis.

Main Methods:

  • Biodegradable lactide-glycolide copolymers were mixed with vancomycin and processed into 8 mm beads via compression and sintering at 55°C.
  • An in vivo animal model was utilized to assess antibiotic elution rates over 55 days.
  • Bacterial inhibition tests were performed to determine the antimicrobial activity of released vancomycin.

Main Results:

  • Biodegradable beads released high concentrations of vancomycin in vivo, exceeding the breakpoint sensitivity concentration for the required 4-6 week treatment duration.
  • Bacterial inhibition zones ranged from 8 to 18 mm, indicating 9.1% to 100% relative antibiotic activity.
  • Systemic blood analysis revealed very low antibiotic concentrations, suggesting minimal systemic exposure.

Conclusions:

  • Antibiotic-impregnated biodegradable beads demonstrate sustained drug release and potent antimicrobial activity in vivo.
  • This biodegradable approach may offer a viable alternative to PMMA beads, potentially reducing the need for repeat surgeries.
  • Biodegradable antibiotic beads show significant potential for preventing and managing surgical site infections, including osteomyelitis.

More Related Videos

Treatment with Vancomycin Loaded Calcium Sulphate and Autogenous Bone in an Improved Rabbit Model of Bone Infection09:09

Treatment with Vancomycin Loaded Calcium Sulphate and Autogenous Bone in an Improved Rabbit Model of Bone Infection

Published on: March 14, 2019

A Novel Method to Determine the Longitudinal Antibacterial Activity of Drug-Eluting Materials06:18

A Novel Method to Determine the Longitudinal Antibacterial Activity of Drug-Eluting Materials

Published on: March 3, 2023

Related Concept Videos

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention01:05

Bioavailability Enhancement: Drug Stability Enhancement and GI Retention

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...
In Vitro Drug Release Testing: Overview, Development and Validation01:10

In Vitro Drug Release Testing: Overview, Development and Validation

In vitro dissolution and drug release tests assess how quickly and how much of a drug is released from its dosage form into an aqueous medium under standardized laboratory conditions. These tests are essential tools in pharmaceutical development and quality assurance, offering insight into the drug's performance before clinical use.During formulation development, dissolution testing identifies incomplete or inconsistent drug release issues. It also supports decisions on selecting the optimal...
In Vitro Drug Dissolution: Alternative Methods01:17

In Vitro Drug Dissolution: Alternative Methods

Alternative drug dissolution methods include the rotating bottle, intrinsic dissolution test, peristalsis, and the Franz diffusion cell method. The rotating bottle method involves meticulously rotating tightly capped controlled-release beads in a temperature-controlled bath. Periodic decanting of samples allows for residue assay, followed by refilling with fresh medium and testing at various pH levels to emulate the gastrointestinal tract conditions.In contrast, the intrinsic dissolution test...
Modified-Release Drug Delivery Systems: Bioavailability01:30

Modified-Release Drug Delivery Systems: Bioavailability

Modified-release (MR) dosage forms are designed to extend drug release over time, thereby maintaining stable plasma concentrations and reducing dosing frequency. However, their bioavailability is typically below 100% due to incomplete drug release and presystemic metabolism, and limitations in drug permeability across the gastrointestinal epithelium, all of which can restrict the fraction of the drug reaching systemic circulation. Consequently, studying the in vivo bioavailability of MR...
Modified-Release Drug Delivery Systems: Drug Release Characteristics01:22

Modified-Release Drug Delivery Systems: Drug Release Characteristics

Drug release from modified-release dosage forms is designed to achieve specific therapeutic effects by controlling the rate and extent of drug release. The classification of these drug release systems is based on key pharmacokinetic assumptions: drug disposition follows first-order kinetics, drug release is the rate-limiting step in absorption, and the released drug is rapidly and completely absorbed.There are four major models of drug release patterns. The first model is the slow zero-order...