In vivo response to biodegradable controlled antibiotic release systems

Korkusuz, F
Korkusuz, P
Eksioglu, F
Gursel, I
Hasırcı, Vasıf Nejat
In this study, the major goal was to evaluate in vitro and in vivo findings by macroscopy, radiology, and histology to determine the effectiveness of therapy of experimental implant-related osteomyelitis with antibiotic carrier rods constructed of microbial polyesters. The polymers used were poly(3-hydroxybutyrate-co-4-hydroxyvalerate) [P(3HB-co-4-HB)] and poly(3-hydroxybutyrate-co-3-hydroxy-valerate) [P(3-HB-co-3-HV)]. Both the Sulperazone(R) and the Duocid(R)-P(3-HB-co-4-HB) rods with a drug to polymer ratio of 1:1 (w/w) were effective in treating the bone infection that was experimentally initiated by inoculation of a hemolytic strain of Staphylococcus aureus (coagulase positive; phage type 52/52b) together with metal implants into the medullary area of rabbit tibia. Macroscopical data revealed that the effectiveness of therapy was apparent at week 6 for all categories tested. Radiological findings with Duocid(R)- and Sulperazone(R)-loaded P(3-HB-co-4-HB) rods improved significantly when judged by changes in periosteal elevation, widening of bone shaft, new bone formation, and soft-tissue deformation after 6 weeks of implantation. Histologically the signs of infection were found to subside by weeks 3 and 6. inflammatory cells were replaced with bone-forming cells upon treatment with Sulperazone(R)-P(3-HB-co-4-HB) and Duocid(R)-P(3-HB-co-4-HB). Osteoblastic activity was prominent. Intramedullary inflammation, although still present, started to be replaced by fibrous or bony tissue. Histological findings presented the subsidence of infection. In summary, the antibiotic-loaded biopolymeric rods appeared to have potential as a new controlled-release system for the treatment of implant related osteomyelitis and chronic osteomyelitis. (C) 2001 John Wiley & Sons, Inc.


In vivo application of biodegradable controlled antibiotic release systems for the treatment of implant-related osteomyelitis
Gursel, I; Korkusuz, F; Turesin, F; Alaeddinoglu, NG; Hasırcı, Vasıf Nejat (2001-01-01)
In this study the construction and in vivo testing of antibiotic-loaded polyhydroxyalkanoate rods were planned for use in the treatment of implant-related osteomyelitis. The rods were constructed of poly(3-hydroxybutyrare-co-3-hydroxyvalerate) and poly(3hydroxybutyrate-co-4-hydroxybutyrate), carrying 50% (w/w) Sulperazone(R) or Duocid(R). They were implanted in rabbit tibia in which implant-related osteomyelitis (IRO) had been induced with Staphylococcus aureus. The effectiveness of the antibiotics in the t...
In vitro bone tissue engineering on patterned biodegradable polyester blends
Kenar, Halime; Hasırcı, Vasıf Nejat; Toner, Mehmet; Department of Biotechnology (2003)
This study aimed at guiding osteoblast cells on biodegradable polymer carriers with well-defined surface microtopography and chemistry, and investigating the effect of cell alignment on osteoblast phenotype expression. A blend of two different polyesters, one being natural in origin (PHBV) and the other synthetic (P(L/DL)LA), was used to form a film with parallel macro- (250 um wide) or microgrooves (27 jam wide) on its surface, by solvent casting on patterned templates. The micropatterned Si template was p...
In vitro induction of growth and development of common juniper(Juniperus communis L.) from shoot and bud explants
Koçer, Zeynep Ahsen; Kaya, Zeki; Department of Biotechnology (2005)
The objective of the study was to investigate the optimum conditions for in vitro regeneration of common juniper (Juniperus communis L.) by using indirect organogenesis approach. Throughout the study; callus induction, organogenesis, improved organogenesis and root induction experiments were performed sequentially. It was found that explant position, genotype, gender, treatments and sampling time had significant effects on callus induction rate in common juniper. The results of treatments indicated that IBA...
In vivo distribution of beta 2 glycoprotein I under various pathophysiologic conditions
Agostinis, Chiara; BİFFİ, Stefania; GARROVO, Chiara; DURİGUTTO, Paolo; LORENZON, Andrea; Bek, Alpan; Bulla, Roberta; Grossi, Claudia; Borghi, Maria O.; Meroni, PierLuigi; Tedesco, Francesco (2011-10-13)
In vitro studies have documented beta 2 glycoprotein I (beta 2GPI) binding to endothelial cells (ECs) and trophoblast using antiphospholipid antibodies. The in vivo binding of beta 2GPI to these cells and the conditions that favor their interaction have not been investigated. We analyzed the in vivo distribution of cyanine 5.5-labeled beta 2GPI in mice and evaluated the effect of pregnancy and circulating antibodies on its tissue localization. The signal was detected in the liver by whole body scan and ex v...
In vitro and in vivo evaluation of the effects of demineralized bone matrix or calcium sulfate addition to polycaprolactone-bioglass composites
ERDEMLİ, ÖZGE; Captug, O.; Bilgili, H.; ORHAN, DİCLEHAN; Tezcaner, Ayşen; Keskin, Dilek (Springer Science and Business Media LLC, 2010-01-01)
The objective of this study was to improve the efficacy of polycaprolactone/bioglass (PCL/BG) bone substitute using demineralized bone matrix (DBM) or calcium sulfate (CS) as a third component. Composite discs involving either DBM or CS were prepared by compression moulding. Bioactivity of discs was evaluated by energy dispersive X-ray spectroscopy (ESCA) and scanning electron microscopy (SEM) following simulated body fluid incubation. The closest Calcium/Phosphate ratio to that of hydroxyl carbonate apatit...
Citation Formats
F. Korkusuz, P. Korkusuz, F. Eksioglu, I. Gursel, and V. N. Hasırcı, “In vivo response to biodegradable controlled antibiotic release systems,” JOURNAL OF BIOMEDICAL MATERIALS RESEARCH, pp. 217–228, 2001, Accessed: 00, 2020. [Online]. Available: