In Vivo Performance of Poly(epsilon-caprolactone) Constructs Loaded with Gentamicin Releasing Composite Microspheres for Use in Bone Regeneration

Sezer, Umran Aydemir
Huri, Pinar Yilgor
Terzioglu, Hakan
Konukseven, Erhan İlhan
Hasırcı, Vasıf Nejat
Hasırcı, Nesrin
For materials used in the production of dental and orthopedic implants or scaffolds for bone tissue regeneration, the properties such as capacity to enhance cell attachment and proliferation, and antimicrobial activity to prevent biofilm formation are very important to improve the clinical utility of the material. In this study, poly(epsilon-caprolactone) (PCL) sponges with antimicrobial activity were prepared by incorporating gentamicin loaded beta-tricalcium phosphate (beta-TCP)-Gelatin microspheres, and in vivo performances were studied. These composite systems are expected to enhance bone regeneration due to beta-TCP and prevent a possible infection by releasing gentannicin in the host location. The effects of gentamicin and beta-TCP/Gelatin microspheres in the sponge structure were studied in vivo by applying them on iliac crest defects of rabbits. Histological analyses after 8 weeks of implantation showed that the composite constructs performed significantly better in bone healing than those with antibiotic-free microspheres. Also, the PCL constructs carrying beta-TCP/Gelatin microspheres led to better bone formation than the pristine PCL scaffolds. Push-out tests demonstrated better integration of the constructs with the tissue indicating high level of material-tissue integration. This study indicates the importance of the presence of antibiotics and beta-TOP/Gelatin in the scaffolds to achieve better and faster healing in bone defects than pristine scaffolds.


Preparation and characterization of poly(epsilon-caprolactone) scaffolds modified with cell-loaded fibrin gel
Malikmammadov, Elbay; Endoğan Tanır, Tuğba; Kızıltay, Aysel; Hasırcı, Nesrin (2019-03-15)
Poly(epsilon-caprolactone) (PCL) is one of the most commonly used polymers in the production of tissue engineered scaffolds for hard tissue treatments. Incorporation of cells into these scaffolds significantly enhances the healing rate of the tissue. In this study, PCL scaffolds were prepared by wet spinning technique and modified by addition of fibrinogen in order to form a fibrin network between the PCL fibers. By this way, scaffolds would have micro and nanofibers in their structures. Drying of the wet s...
Öndin, Nilsu; Durucan, Caner; Department of Metallurgical and Materials Engineering (2022-11-22)
Synthetic materials for bone defects have been widely used for biomedical applications. One of these materials is bioactive ceramic-based microspheres in the size range of couple 100s m. These microspheres are used for irregular defect filling operations due to high packing efficiency. The spherical shape also increases the surface area, reactivity, and cell adhesion. The osteoconduction (bone tissue growth) is the primary concern for hard-tissue replacements and grafts. Alpha-tricalcium phosphate (-TCP, ...
Development of manganese-doped hydroxyapatite incorporated PCL electrospun 3D scaffolds coated with gelatin for bone tissue engineering
Samiei, Alaleh; Keskin, Dilek; Evis, Zafer; Department of Biomedical Engineering (2023-1-27)
Combination of polymers and bioceramics has increased their importance in bone tissue engineering (BTE) to treat various defects. Within this frame, in this thesis, it is aimed to develop a 3D gelatin-coated PCL scaffold combined with Mn-doped hydroxyapatite (HA) in order to investigate the effect of the doping element, i.e., the manganese (Mn) ion, on the structural and biological properties of the composite scaffold. Pure and Mn-doped HAs were synthesized using microwave irradiation, and the samples were ...
Metabolomics analysis of iPSCs derived organoids
Sarı , Vedat; Koçak , Gamze; Reçber, Tuba; Karakülah , Gökhan; Utine , Canan Aslı; Nemutlu , Emirhan; Güven, Sinan (Orta Doğu Teknik Üniversitesi Enformatik Enstitüsü; 2022-10)
Regenerative medicine is focused on functional restoration of a particular tissue and organs. Stem cell based miniaturized heterogenous cellular clusters named organoids, exhibit features of organ functionality, self-organization, multicellularity, and utility. Induced pluripotent stem cells (iPSCs), have great potential to develop organoids of specific tissues and utilized in regenerative medicine. Organoid technologies have revolutionized the approach to human development and diseases, providing outstandi...
In vivo response to biodegradable controlled antibiotic release systems
Korkusuz, F; Korkusuz, P; Eksioglu, F; Gursel, I; Hasırcı, Vasıf Nejat (2001-05-01)
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 ra...
Citation Formats
U. A. Sezer et al., “In Vivo Performance of Poly(epsilon-caprolactone) Constructs Loaded with Gentamicin Releasing Composite Microspheres for Use in Bone Regeneration,” JOURNAL OF BIOMATERIALS AND TISSUE ENGINEERING, pp. 786–795, 2014, Accessed: 00, 2020. [Online]. Available: