Related Experiment Video
Updated: Jun 17, 2026
Site-Directed Immobilization of Bone Morphogenetic Protein 2 to Solid Surfaces by Click Chemistry
Published on: March 29, 2018
Antibiotic-Loaded Ready-to-Use Latex Beads for Localized Treatment of Bone Infections
Hariharan Sekar1, Nidhi Pandey1, Falguni Gudekar1
1Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.
Abstract:
Osteomyelitis remains a persistent healthcare concern due to bacterial invasion and difficulty in inhibiting and eradicating biofilm-forming bacteria from infected bone tissue. Conventional therapies, including systemic antibiotics and surgically implanted beads made of calcium sulfate or polymethyl methacrylate, are hindered by complications like cytotoxicity, uneven drug distribution, and thermal denaturation of antibiotics during polymerization. Here, a solvent-free droplet approach is introduced for producing ready-to-use antibiotic-loaded beads through controlled aggregation of pre-formed polymer latex nanoparticles composed of poly (methyl methacrylate-co-butyl acrylate) [P(MMA-BA)]. Calcium chloride, a benign coagulant, triggers the controlled aggregation of latex nanoparticles and enables bead formation without the need for hand-mixing, chemical initiators, and solvents used in the existing PMMA bead fabrication method. Ampicillin was incorporated as a model antibiotic to evaluate antimicrobial and biocompatibility performance. The resulting beads demonstrated prolonged antibacterial activity and strong inhibition of Staphylococcus aureus biofilms. In co-culture systems with osteoblast Saos-2 cells, the beads selectively inhibited bacterial growth while maintaining cell viability, confirming their dual antibacterial and cytocompatibility functions. In vivo evaluations further supported their effectiveness in infection control and tissue integration. Overall, these results highlight the potential of latex particle-assembled polymeric beads as a scalable, solvent-free, and efficient platform for targeted bone infection treatment.
Insights
New polymer beads offer a solvent-free method to treat bone infections. These antibiotic-loaded beads effectively inhibit bacterial growth and biofilms while remaining safe for bone cells, improving infection control.
Area of Science:
- Biomaterials Science
- Infectious Disease Research
- Nanotechnology
Background:
- Osteomyelitis presents significant challenges due to antibiotic-resistant biofilms in bone tissue.
- Current treatments like systemic antibiotics and traditional bone beads have limitations including cytotoxicity and poor drug delivery.
- Developing novel, effective, and safe delivery systems for bone infection treatment is crucial.
Purpose of the Study:
- To develop a novel, solvent-free method for creating antibiotic-loaded polymeric beads for osteomyelitis treatment.
- To evaluate the antimicrobial efficacy, biofilm inhibition, and cytocompatibility of these new beads.
- To assess the in vivo performance of the beads for bone infection control and tissue integration.
Main Methods:
- Fabrication of poly (methyl methacrylate-co-butyl acrylate) [P(MMA-BA)] latex nanoparticles.
- Solvent-free droplet approach using calcium chloride as a coagulant for controlled nanoparticle aggregation and bead formation.
- Incorporation of ampicillin as a model antibiotic.
- In vitro assessment of antibacterial activity, biofilm inhibition against Staphylococcus aureus, and cytocompatibility with Saos-2 osteoblast cells.
- In vivo evaluation of efficacy in infection control and tissue integration.
Main Results:
- The novel solvent-free method successfully produced antibiotic-loaded P(MMA-BA) beads.
- The beads exhibited prolonged antibacterial activity and significantly inhibited Staphylococcus aureus biofilm formation.
- Co-culture studies confirmed selective bacterial inhibition while maintaining osteoblast cell viability, demonstrating dual functionality.
- In vivo studies supported the beads' effectiveness in managing bone infections and promoting tissue integration.
Conclusions:
- Latex particle-assembled polymeric beads represent a promising, scalable, and solvent-free platform for targeted bone infection therapy.
- This approach overcomes limitations of conventional methods, offering improved safety and efficacy.
- The developed beads show significant potential for clinical application in treating osteomyelitis.
More Related Videos
Related Concept Videos
00:57Antibiotic Selection
01:25Clinical Significance of Antibiotic Resistance