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KÖSE, KEMAL NACİ

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KÖSE

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KEMAL NACİ

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2018 - 20202
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Author: KURU, LEYLA × Subject: EXPRESSION ×

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    PublicationOpen Access
    Evaluation of the Effectiveness of Esterified Hyaluronic Acid Fibers on Bone Regeneration in Rat Calvarial Defects
    (HINDAWI LTD, 2018-06-28) ÖZBEYLİ, DİLEK; Agrali, Omer B.; Yildirim, Selin; Ozener, Hafize O.; Kose, Kemal N.; Ozbeyli, Dilek; Soluk-Tekkesin, Merva; Kuru, Leyla
    Hyaluronic acid (HA) constitutes one of the major components of the extracellular matrix domain in almost all mammals. The aim of this study was to evaluate the regenerative capacity of HA matrix in rat calvarial bone defects and compare with those of different combinations of resorbable collagen membrane (M) and bovine-derived xenograft (G). Twenty-four 3-month-old male Sprague-Dawley rats weighing 200-250 g were included. Control group was created by leaving one defect empty from 2 critical size defects with 5 mm diameter formed in the calvarial bones of 8 rats. In the same rats, the other defect was treated with HA matrix alone. One of the 2 defects formed in other 8 rats was treated with HA + G and the other with HA + M. One of the 2 defects formed in the remaining 8 rats was treated wilh G+M and the other with HA+G+M. The animals were sacrificed at 4 weeks. Histologic, histomorphometric, and immunohistochemical analyses were performed. Both HA matrix alone and its combinalions with G and M supported new bone formation (NBF). However, NBF was significantly greater in G+M and HA+G+M groups compared to control and HA alone (P < 0.00l). Bone morphogenetic protein-2 was expressed with varying degrees in all groups, without any difference among them. Within the limitations of the present study, HA matrix, used alone or in combination with G and M, did not contribute significantly to bone regeneration in rat calvarial bone defects.
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    The gingival crevicular fluid levels of growth factors in patients with amlodipine-induced gingival overgrowth: A pilot study
    (WOLTERS KLUWER MEDKNOW PUBLICATIONS, 2020) YILDIRIM, HATİCE SELİN; Kose, K. N.; Yilmaz, S.; Noyan, U.; Kuru, B.; Yildirim, H. S.; Agrali, O. B.; Ozener, H. O.; Kuru, L.
    Background: Amlodipine, calcium channel blocker (CCB), is used in the management of cardiovascular diseases which causes gingival overgrowth (GO). The growth factors may have a role in the pathogenesis of amlodipine-induced GO. Objectives: This pilot study aimed to investigate the growth factors including transforming growth factor-b1 (TGF-b1), platelet-derived growth factor-BB (PDGF-BB), and basic fibroblast growth factor (bFGF) in gingival crevicular fluid (GCF) of patients with amlodipine-induced GO and compare with of healthy subjects. Methods: GCF samples were collected from 56 sites presenting GO (GO + group) and from 38 sites not presenting GO (GO- group) of 5 patients using amlodipine for more than one year, and from 45 sites (control group) of 5 healthy subjects. The levels of TGF-b1, PDGF-BB, and bFGF were determined by using ELISA kits. Results: The mean concentration of TGF-b1 in GCF samples of GO + group (9.50 +/- 7.30 ng/ml) was higher than both GO- group (2.07 +/- 0.50 ng/ml) and control group (2.74 +/- 1.01 ng/ml) (P = 0.014). No significant difference was found among the groups in the GCF levels of PDGF-BB (P = 0.767). bFGF was detected in only 33% of the sites from patients. Conclusion: These preliminary results suggest that TGF-b1 may play a crucial role in the pathogenesis of amlodipine-induced GO.