Browsing by Author "Kendirci R."

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    In vitro cultivation, characterization and osteogenic differentiation of stem cells from human exfoliated deciduous teeth on 3D printed polylactic acid scaffolds
    (Kowsar Medical Publishing Company, 2017) Islam A.; Mammadov E.; Kendirci R.; Aytac E.; Cetiner S.; Vatansever H.S.
    Background: Tissue engineering mainly focuses on creating appropriate conditions for the regeneration of tissues. Scaffolds, signal molecules, and stem cells interact with each other and compose the essential components of this field. Objectives: This study aimed at investigating the osteogenic induction ability of PLA Poly Lactic Acid (PLA) scaffolds and comparing the osteogenic differentiation behavior of Stem Cells from Human Exfoliated Deciduous Teeth (hSHEDs) in standard culture medium and on PLA scaffolds. Methods: The current clinical experimental study was conducted between April 2016 and October 2016 at the Near East University cell culture laboratory located in North Cyprus. The pulp tissues of deciduous teeth (non-decayed and in the absence of abscess, fistula or periapical lesion) were sampled from 10 healthy children aged between 6 and 11 years. The isolated hSHEDs were divided to 4 groups. The control group/Group1 consisted of cells, which were cultivated in standard culture medium, and Group2 cells were differentiated into an osteogenic lineage using osteogenic differentiation medium. Group 3 represented the non-differentiated group, which was transferred onto three dimensional (3D) printed PLA scaffolds and Group 4 cells were differentiated to the osteogenic lineage and transferred onto 3D printed PLA scaffolds. All groups were analyzed immunohistochemically and by immune-labeling, and were evaluated semi-quantitatively using the HSCORE. Results: Cultivation of hSHEDS on PLA scaffolds was assessed for 14 and 21 days; osteogenic differentiation was detected both histochemically and immunohistochemically. Generally, Osteocalcin (OCN) immunoreactivities were higher than Osteonectin (ON) immunoreactions in all groups. Despite higher OCN immunoreactivities, the intensities of OCN between 14 days and 21 days in group 4 (497.3 ± 0.57% and 486.7 ± 5.77%, respectively) were similar (P > 0.05). While the intensity of ON was 280.0 ± 10% in group 4, in group 2 the intensity of ON was 206.7 ± 5.77%, and on the 14th day the results were statistically significant (P < 0.0001). Conclusions: Poly lactic acid is a suitable scaffold material for osteogenic induction of the hSHEDs. The expression patterns of both markers showed that a 14-day cultivation period is adequate for hSHEDs with/without PLA scaffolds to differentiate into osteoblasts. © 2017, Iranian Red Crescent Medical Journal.
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    Effects of adipose and bone marrow-derived mesenchymal stem cells on vaginal atrophy in a rat menopause model
    (Elsevier B.V., 2019) Kasap B.; Kasap; Vatansever S.; Kendirci R.; Yılmaz O.; Çalışır M.; Edgünlü T.; Akın M.N.
    Background & objectives: Vaginal atrophy is characterized by thinning of vaginal epithelial layers and decreased local blood flow. We aimed to evaluate the regenerative effects of Adipose derived mesenchymal stem cells (ADMSC) and Bone marrow derived mesenchymal stem cells (BMDSC) on vaginal atrophy in rat menopause model. Materials and methods: Rats were randomly divided into 4 (four) groups: sham, control, ADMSC, BMDSC. Vaginal epithelial thickness, structure of the lamina propria, blood vessels in the lamina propria, collagen deposition, and muscle structure were evaluated. Anti ER α, VEGF, VEGFR 1, Bax and bcl-2 antibodies were analyzed. Beta actin gene was used as endogenous control. Genetical differences among the groups were compared by using Kruskal Wallis and Mann Whitney U test. p < 0.05 was regarded as statistically significant. Results: Epithelial thickness of ADMSC group was higher than control group, but less than sham group Epithelial thickness of BMDSC group was less than sham group. Lamina propria and muscle tissue of ADMSC and BMDSC groups were found to be similar to sham group. VEGFR-1, VEGF, Bax and ER-α staining levels were higher in ADMSC and BMDSC groups than control group. ADMSC group stained stronger with VEGFR-1 and VEGF than BMDSC group. Bcl-2 staining level was increased in ADMSC applied group. No statistically significant difference was detected in Bax and Bcl-2 genes and Bax-/Bcl-2 ratio. Conclusions: Although genetic expression might have ended and could not be significantly demonstrated, histological and immunohistochemical results favor ADMSC application in vaginal atrophy rather than BMDSC. © 2019 Elsevier B.V.
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    Synthesis and cytotoxic activities of organometallic Ru(II) diamine complexes
    (Academic Press Inc., 2020) Kavukcu S.B.; Şahin O.; Seda Vatansever H.; Kurt F.O.; Korkmaz M.; Kendirci R.; Pelit L.; Türkmen H.
    A series of mono and bimetallic ruthenium(II) arene complexes bearing diamine (Ru1-6) were prepared and fully characterized by 1H, 13C, 19F, and 31P NMR spectroscopy and elemental analysis. The crystal structure of the bimetallic complex (Ru5) was determined by X-ray crystallography. Monometallic analogues (Ru1-3) were synthesized to investigate the contributions of ruthenium and the other organic groups (aren, ethylenediamine, butyl) to the activity. The electrochemical behaviors of mono and bimetallic complexes were obtained from the relationship between cyclic voltammetry (CV) and the biological activities of the compounds. The cytotoxic activities of the complexes (Ru1-6) were tested against wide-scale cancer cell lines, namely HeLa, MDA-MB-231, DU-145, LNCaP, Hep-G2, Saos-2, PC-3, and MCF-7, and normal cell lines 3T3-L1 and Vero. Diamine Ru(II) arene complexes have unique biological characteristics and they are promising models for new anticancer drug development. MTT analysis reveals that each synthesized Ru complex showed cytotoxic activity towards the different cancer cells. In particular, three Ru complexes (Ru3, Ru5 and Ru6) showed less toxic effects on the cancer cells than the others. These novel Ru complexes affected both cancer and normal cell lines. As they had a toxic effect on the cells, the dosage applied should be tested before being used for in vivo applications. Cytotoxicity tests have shown that the bimetallic complex Ru6 was effective on all cancer cells. The effect of bimetallic enhancement on cancer cell lines, the systematic variation of the intermetallic distance and the ligand donor properties of the mono and bimetallic complexes were explored based on the cytotoxic activity. The interaction with FS-DNA and the stability/aquation of the complexes (Ru3 and Ru6) were investigated with 1H NMR spectroscopy. The binding modes between the complexes (Ru3 and Ru6) and DNA were investigated via UV–Vis spectroscopy. © 2020 Elsevier Inc.