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    The effect of Hypericum Perforatum on wound healing of oral mucosa in diabetic rats
    (Istanbul Univ Press, Istanbul Univ Rectorate, 2018) Altan, Ahmet; Aras, Mutan Hamdi; Damlar, Ibrahim; Gokce, Hasan; Ozcan, Oguzhan; Alpaslan, Cansu
    Purpose This study aims to investigate the histopathological and biochemical effects of the topical application of Hypericum perforatum on the healing of surgical wounds created in the oral mucosa of rats with experimentally induced diabetes mellitus. Materials and methods The study was carried out on 48 adult male Wistar albino rats. The animals were divided into two main groups as control and study groups. Two main groups were divided into three subgroups according to the sacrification days. All rats were given streptozotocin 60 mg/kg, after 72 hours, and those having blood glucose levels above 200 mg/dL were included in the study. Mucosal defects were created in the palatal area of the rats. H. perforatum oil was applied topically twice a day to the wounds of the rats in the study group. Animal were sacrificed on the 3rd, 7th and 10th days and samples taken from the palatal wounds were examined histologically and biochemically. Results On the 7th day, ulceration, necrosis, epithelialization, polymorphonuclear leucocytes and hydroxyproline variables showed statistically significant differences (p<0.05). Ulceration, necrosis and polymorphonuclear leukocytes values were higher in the control group, whereas epithelialization and hydroxyproline values were found to be higher in the H. perforatum group. Among 10th-day groups, there was only a statistically significant difference between the values of hydroxyproline, whereas H. perforatum-treated group showed high hydroxyproline levels (p<0.05). Conclusion Topically applied H. perforatum did not create any difference on the 3rd day, but it has positively affected the wound healing on the 7th and 10th days in diabetic rats.
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    Effects of Alpha-Lipoic Acid on TGF-?1 and Urotensin-II Levels in Glucocorticoid-Induced Osteonecrosis in Rats
    (Kowsar Publ, 2020) Koca, Irfan; Dokuyucu, Recep; Tas, Zeynel Abidin; Gokce, Hasan; Ozcan, Oguzhan
    Background: Osteonecrosis (ON) is a serious health problem, which dramatically reduces the quality of life. Objectives: In the present study on the rat model of glucocorticoids (GCs) -induced ON, we explored the influence of alpha-lipoic acid on serum levels of TGF-fi1 and urotensin-II (U-II) and on histological alteration with respect to fatty degeneration and osteocyte necrosis. Methods: A total of 32 male Wistar albino rats were equally assigned to four groups, including control, methylprednisolone acetate (MPA), alpha-lipoic acid (ALA), and MPA with ALA (MP1 + ALA). The animals in MPA group subcutaneously received 15 mg/kg/week during 2 weeks, whereas 100 mg/kg/day ALA was intraperitoneally administered to ALA group during 4 weeks. The MPA + ALA group had both treatments with the same doses. ON was confirmed and graded histologically. Lipid peroxidation and DNA damage levels were immunohistochemically assessed in rats' bones. Results: After histopathological examinations, ALA injection attenuated oxidative stress levels through reducing both 8-OHdG-and 4-HNE-positive cells in the femoral head region (P < 0.05). The U-II and TGF-fi1 protein levels significantly decreased after ALA treatment in MPA injected animals (P < 0.05, P < 0.01, respectively). Moreover, there was a strong correlation between U-II and TGF-fi 1 protein levels (P = 0.019, r = 0.884). Conclusions: This study is novel with regard to showing the therapeutic effects of ALA on GC-inducedONin rats as well as the strong correlation between the expression levels of U-II and TGF-fi1 proteins. In this regard, ALAmaybe a therapeutic agent in the treatment of ON patients.
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    Protective effect of dexpanthenol on gentamicin-induced nephrotoxicity in rats
    (2019) Pinar, Neslihan; Ozcan, Oguzhan; Dogan, Esin; Cakirca, Gokhan
    Aim: We evaluated the protective effects of dexpanthenol (Dxp) in rats with gentamicin (Genta)-induced nephrotoxicity by assessing a panel of biochemical and histopathologic parameters.Material Methods: Forty rats were divided randomly into the following four groups: Control group, physiological saline solution (0.5 cc intraperitoneally (i.p.) for 8 days; Dxp group, Dxp (500 mg/kg i.p.) for 8 days; Genta group, Genta (100 mg/kg, i.p.) for 8 days; and Genta+Dxp group, Gent a and Dxp (100 and 500 mg/kg i.p., respectively) for 8 days.Results: TIn the Genta group, the urea, creatinine, tumor necrosis factor-alpha (TNF-α), total oxidant status (TOS), oxidative stress index (OSI) and malondialdehyde (MDA) levels were significantly higher and the catalase (CAT) and glutathione peroxidase (GSH-Px) activities were significantly lower than those in the control group. In the Genta+Dxp group, the urea, creatinine, and TNF-α, TOS, OSI and MDA levels were significantly lower and the CAT and GSH-Px activities were significantly higher than those in the Genta group. Histopathological investigation showed severe tubular necrosis in the Genta group, which was of lesser severity in the Genta+Dxp group. Conclusion: The biochemical and histopathologic results of this study indicate that Dxp can ameliorate Genta-induced nephrotoxicity.Keywords: Oxidative stress; antioxidant; gentamicin; nephrotoxicity; dexpanthenol.
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    YKL-40 and fibronectin levels in patients with placental invasion anomaly
    (2021) Soylu Karapinar, Oya; Sahin, Hanifi; Gozukara, Ilay; Adeviye Sahin, Eda; Ozcan, Oguzhan; Sezgin, Burak; Gungoren, Arif
    Aim: To investigate the level of YKL-40 and fibronectin in patients with total placenta previa and to evaluate the presence of placental invasion anomaly such as accreta. Materials and Methods: A total of 60 patients were included in this prospective study. The patients were classified according to the placental localization as assessed through ultrasound. The study group consisted of 33 patients diagnosed with placenta previa or accreta with previous cesarean section. These patients were also subdivided into two groups according to the histopathological examination results as invasion-positive group and invasion-negative group. The control group consisted of 27 patients who were admitted to the gynecology clinic with previous cesarean deliveries and had normal placental localization. Serum YKL-40 and fibronectin levels were measured in two groups via human chitinase-3-like protein 1 (Ykl-40/CHI3L1) and fibronectin enzyme-linked immunosorbent assay kits. Results: Mean serum levels for YKL-40 and fibronectin were similar between the study and control groups. In the subgroup analysis according to invasion anomaly, the level of YKL-40 in invasion-positive group (n=11) was higher than invasion-negative group (n=22), indicating a statistically significant difference. Conclusion: Outcomes of this research indicates that YKL-40 can be used as a marker for identifying placental invasion anomalies.