Browsing by Author "Gemalmaz, HC"

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    Role of a combination dietary supplement containing mucopolysaccharides, vitamin C, and collagen on tendon healing in rats
    (TURKISH ASSOC ORTHOPAEDICS TRAUMATOLOGY) Gemalmaz, HC; Sanyilmaz, K; Ozkunt, O; Gurgen, SG; Silay, S
    Objective: The aim of this study was to investigate the effect of mucopolysaccharide, vitamin C, and collagen supplementation on the healing of Achilles tendon in rats. Methods: Sixteen rats were separated into 2 groups. Both Achilles tendons of all rats were transected 5 mm above the insertion and repaired using a Kessler suture. After the surgical repair, the study group received the daily recommended amount of the supplement by gastric gavage, while the control group received a placebo. At the end of the third week, the animals were sacrificed. The biomechanical properties of the groups were compared with ultimate tensile strength and stiffness tests. The biological properties of the 2 groups were assessed with a histomorphometric comparison to determine the amount of collagen type I (COL1), proliferating cell nuclear antigen (PCNA), and transforming growth factor beta 1 (TGF-beta 1) expression in 3 different tissue subgroups (collagen matrix, tenocytes, and endotenon fibroblasts). Results: Analysis of histomorphometric results revealed that the rats receiving dietary supplements demonstrated a significant increase in PCNA (mean value of 86 in the control group and 168.85 in the trial group; p < 0.05) and TGF-beta 1 (mean value of 87.57 in the control group and 161.85 in the trial group; p < 0.05) in the endotenon fibroblasts of the repair site. However, there was no difference between the groups in PCNA or TGF-beta 1 when the collagen matrix and the tenocytes of the repair site were examined. Furthermore, no significant difference could be found between groups in COL1 in any of the 3 tissue subgroups (collagen matrix, tenocytes, and endotenon fibroblasts). The statistical analysis also indicated that the rats receiving supplements did not demonstrate a significant increase in the ultimate tendon tensile strength or stiffness. Conclusion: The results of this study revealed no advantage to the oral administration of the trial supplement in collagen synthesis or biomechanical properties in rats after 3 weeks using the presented study design. However, the increased expression of PCNA and TGE-beta 1 seen in the endotenon fibroblasts of the repair site might play a role in the continuum of tendon healing. (C) 2018 Turkish Association of Orthopaedics and Traumatology. Publishing services by Elsevier B.V.
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    Investigation of efficacy of treatment in spinal cord injury: Erythropoietin versus methylprednisolone
    (SAGE PUBLICATIONS INC) Ozkunt, O; Sariyilmaz, K; Gemalmaz, HC; Gürgen, SG; Yener, U; Dikici, F
    Background: Investigation of the expression of platelet-derived growth factor (PDGF)-beta and glial fibrillary acidic protein (GFAP) in rats with spinal cord injury as a marker of neurologic recovery between groups treated with erythropoietin (EPO) and methylprednisolone (MP). Methods: Thirty adult female rats were randomly divided into three even groups. A laminectomy was applied to thoracic ninth vertebra and contusion injury was induced by extradural application of an aneurysm clip. Group 1 rats received one-time intrathecal administration of normal saline, group 2 rats received MP, and group 3 rats received EPO. Motor neurological function was evaluated by the Basso, Beattie, and Bresnahan (BBB) locomotor rating scale. Thirty days after the surgery, T8-10 segments of the spinal cords were extracted and the immunohistochemical assay revealed the number of PDGF-beta- and GFAP-positive cells. Results: Evaluation of the last control animal showed that BBB score in the EPO group showed an increase from 1 to 12 (p < 0.05). The immunohistochemical assay revealed that the number of PDGF-beta- and GFAP-positive cells was significantly higher in EPO group (p = 0.000) when compared to MP and control groups. After studying the effect of PDGF-beta expression on the locomotor function, we determined that PDGF-beta expression and locomotor function after a spinal injury has a strong relationship (p < 0.05). Conclusion: EPO seems to better increase the expression of PDGF-beta, thus produce better results in locomotor functions when compared to MP.
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    English
    (0391-3988) Gemalmaz, HC; Bolukbasi, S; Esen, E; Erdogan, D; Gürgen, SG; Bardakci, Y
    WICHTIG EDITORE