Browsing by Author "Ilknur A.E."

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    Efficiency of bioflavonoids in the prevention of experimental myringosclerosis
    (2010) Ilknur A.E.; Dundar R.; Basoglu S.; Inan S.; Aktas S.; Aslan H.; Ozkul Y.; Ozturkcan S.; Katilmis H.
    Objectives/Hypothesis: It has been noted that some materials with anti-inflammatory and antioxidant effects decrease sclerotic lesions in experimental myringosclerosis. Our purpose in this study is to investigate the effect of micronized purified flavonoid fraction (MPFF), an antioxidant with anti-inflammatory effects, in experimental myringosclerosis in guinea pigs. Materials and Methods: Two study groups were formed. The first group was administered 100mg/kg/day MPFF by catheter for five days before myringotomy and 10 days after myringotomy, while the second group was administered distilled water by the same method, before and after myringotomy. On the 15th day of the study, after the tympanic membranes were examined otomicroscopically for myringosclerosis, they were removed by dissection together with the bone annulus, for histochemical and immunohistochemical examinations. Results: In the MPFF group, the otomicroscopical sclerosis score, inflammation score and tympanic membrane thickness were significantly less than those in the untreated group (p<0.05). It was also determined that the immunoactivity of the anti-VEGF, anti-TGF-beta, anti-eNOS, anti-iNOS, and anti-IL1-beta primary antibodies, which are known to have an important role in angiogenesis and inflammation, significantly decreased in the MPFF group (p<0.05). Conclusion: In conclusion, this study shows that orally administered MPFF can be efficient in the prevention of experimental myringosclerosis in guinea pigs. Copyright 2005 © The Mediterranean Society of Otology and Audiology.
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    Inhibitory effect of N-acetyl cysteine and ascorbic acid on the development of myringosclerosis: AN experimental study
    (Elsevier Ireland Ltd, 2014) Dündar R.; Inan S.; Muluk N.B.; Cingi C.; Ilknur A.E.; Katilmiş H.
    Objectives: This study investigated the effects of ascorbic acid and N-acetyl cysteine (NAC) antioxidants on the development of myringosclerosis (MS) in an experimental model. Methods: Myringotomies were performed in the ears of 15 guinea pigs, and Spongostan® pieces were placed on the perforated regions of the tympanic membrane. The subjects were divided randomly into three groups and treated with three different solutions on the Spongostan-group 1: (control, 0.9% saline), group 2 (ascorbic acid), and group 3 (NAC). On day 15 after treatment, specimens from the tympanic membranes were obtained and examined via light microscopy. Sclerosis and inflammation scores and the tympanic membrane thicknesses were evaluated. Immunohistochemical methods were used to evaluate the expression of VEGF, TGF-β, iNOS, and IL1-β in all groups. Results: Lower sclerosis and inflammation scores and reduced tympanic membrane thicknesses were observed in groups treated with NAC or ascorbic acid compared with the control group. Immunohistochemical studies revealed significantly less expression of VEGF, TGF-β, and iNOS in groups 2 and 3 compared with group 1. Additionally, IL1-β expression was significantly less in group 3 than in group 1. Compared with group 1, group 2 animals exhibited reduced inflammation in the lamina propria, fewer active fibroblasts, less leukocyte infiltration, and decreased thickness of the vessels; group 3 animals exhibited decreased numbers of active fibroblasts and collagen fibers in the lamina propria. Conclusions: Inflammation scores, cellular infiltration, and expression of VEGF, TGF-β, and iNOS were reduced by ascorbic acid and/or NAC treatments, thereby decreasing MS development. Decreased expression of IL1-β was observed only in animals treated with NAC. © 2014 Elsevier Ireland Ltd.