Bioerodible polyanhydrides for antibiotic drug delivery: In vivo osteomyelitis treatment in a rat model system

C. T. Laurencin, P. Gerhart, P. Witschger, R. Satcher, A. Domb, Andrew Rosenberg, P. Hanff, L. Edsberg, W. Hayes, R. Langer

Research output: Contribution to journalArticle

97 Citations (Scopus)

Abstract

Acute and chronic osteomyelitis can be difficult to treat by conventional means. Current methods of treatment involve the use of systemic antibiotics, the local implantation of non-degradable drug carriers, and surgical debridement. Each method has specific drawbacks. We report on the use of a new controlled release system utilizing gentamicin and bioerodible, biocompatible polymers (polyanhydrides) designed for drug delivery applications for the treatment of clinical osteomyelitis. We compared this system's ability to reduce bacterial levels in infected bone with that of conventional non-degradable delivery systems based on polymelhylmethacrylate (PMMA) and gentamicin. Polyanhydride copolymers of bis-carboxyphenoxypropane and sebacic acid P loaded with gentamicin sulfate and PMMA/gentamicin matrices were implanted in the long bones of Sprague-Dawley rats infected with a strain of Staphylococcus aureus. After 3 weeks of implantation, the polymeric delivery devices were removed and quantitative cultures were used to determine bacterial levels in bone. The polyanhydride/gentamicin matrices demonstrated significant degradation over the 3 week implantation period. Levels of bacteria, measured in colony forming units, were significantly lower in bone implanted with the polyanhydride/gentamicin release system than in long bones of control animals without an implant (p < 0.01), of animals with a polyanhydride polymer implant alone (p < 0.01), and of animals with a PMMA/gentamicin implant (p = 0.03), Bioerodible polyanhydrides show promise as a new treatment modality for infections in bone.

Original languageEnglish
Pages (from-to)256-262
Number of pages7
JournalJournal of Orthopaedic Research
Volume11
Issue number2
DOIs
StatePublished - Mar 1 1993
Externally publishedYes

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Polyanhydrides
Osteomyelitis
Gentamicins
Anti-Bacterial Agents
Bone and Bones
Pharmaceutical Preparations
Therapeutics
Polymers
Drug Carriers
Debridement
Sprague Dawley Rats
Staphylococcus aureus
Stem Cells
Bacteria
Equipment and Supplies

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Bioerodible polyanhydrides for antibiotic drug delivery : In vivo osteomyelitis treatment in a rat model system. / Laurencin, C. T.; Gerhart, P.; Witschger, P.; Satcher, R.; Domb, A.; Rosenberg, Andrew; Hanff, P.; Edsberg, L.; Hayes, W.; Langer, R.

In: Journal of Orthopaedic Research, Vol. 11, No. 2, 01.03.1993, p. 256-262.

Research output: Contribution to journalArticle

Laurencin, CT, Gerhart, P, Witschger, P, Satcher, R, Domb, A, Rosenberg, A, Hanff, P, Edsberg, L, Hayes, W & Langer, R 1993, 'Bioerodible polyanhydrides for antibiotic drug delivery: In vivo osteomyelitis treatment in a rat model system', Journal of Orthopaedic Research, vol. 11, no. 2, pp. 256-262. https://doi.org/10.1002/jor.1100110213
Laurencin, C. T. ; Gerhart, P. ; Witschger, P. ; Satcher, R. ; Domb, A. ; Rosenberg, Andrew ; Hanff, P. ; Edsberg, L. ; Hayes, W. ; Langer, R. / Bioerodible polyanhydrides for antibiotic drug delivery : In vivo osteomyelitis treatment in a rat model system. In: Journal of Orthopaedic Research. 1993 ; Vol. 11, No. 2. pp. 256-262.
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