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    Effect of mesenchymal stem cells therapy in experimental kaolin induced syringomyelia model
    (Minerva Medica, 2022) Bal, Ercan; Hanalioğlu, Şahin; Köprü, Çağla Zübeyde; Köse, Sevil; Başak, Ahmet T.; Pehlivan, Sibel; Çetinkaya, Duygu; Purali, Nuhan; Korkusuz, Petek; Bozkurt, Gökhan
    Background: Syringomyelia is a pathological cavitation of the spinal cord. In this study, we examined whether a syrinx cavity would limit itself with axonal regeneration and stem cell activity in the cavity, and we evaluated subjects on a functional basis.Methods: Groups were designated as kaolin, trauma, kaolin-trauma, and saline groups. Also divided out of the syringomyelia treated groups were those given human mesenchymal stem cells (hMSCs). All groups were evaluated with immunohistochemistry, electron microscopy, confocal microscopy and functionally.Results: The kaolin-trauma group had a significant correction of BBB score with hMSCs therapy. The syrinx cavity measurements showed significant improvement in groups treated with hMSCs. The tissue surrounding the syrinx cavity, however, appeared to be better organized in groups treated with hMSCs. The process of repair and regeneration of damaged axons in the lesion were more improved in groups treated with hMSCs. Using confocal microscopy, fluorescence of hMSCs was observed in the central canal, in the ependymal tissue, and around the lesion.Conclusions: It was concluded that axonal repair accelerated in groups receiving stem cells, and thus, stem cells may be effective in recovery of neural tissue and myelin damage in syringomyelia.
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    Glucosamine-sulfate on fracture healing
    (Turkısh Assoc Trauma Emergency Surgery, 2013) Uğraş, Akın; Güzel, Elif; Korkusuz, Petek; Kaya, İbrahim; Dikici, Fatih; Demirbaş, Emrah; Çetinüs, Ercan
    BACKGROUND The aim of this study is to determine whether glucosamine-sulfate has any effects on bone-healing. METHODS A unilateral fracture was created in the tibia of sixty-one female rats. Rats were given no drug or 230 mg/kg glucosamine- sulfate daily. Fractures were analyzed during the first, second and fourth weeks after creation of fracture. Quantitative measurement for new bone formation and osteoblast lining were determined histologically. Semiquantitative score for fracture healing was used for histomorphometric analyses. Bridging bone formation was assessed radiographically. RESULTS New bone formation and osteoblast lining were significantly higher in glucosamine-treated group at week 1. Surrounding connective tissue was more cellular and vascular, and the newly formed bone trabecules were present in greater amounts in glucosamine-treated group, compared to control group at week 1 and 4. But radiologically, the control group had better scores than that of the glucosamine- treated group at week 4. CONCLUSION These data demonstrate that daily glucosamine-sulfate administration accelerates early phase of fracture repair in the rat tibia, with increased new bone formation and osteoblast lining histologically, but radiologic bone union is not favored on radiographs.