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Öğe Comparison of histopathological effects of thymoquinone and local nasal corticosteroids in allergic rhinitis in a rabbit model(Karger, 2016) Yurttaş, Veysel; Şereflican, Murat; Erkoçoğlu, Mustafa; Dağlı, Muharrem; Terzi, Elçin Hakan; Fırat, Tülin; Seyhan, SinanBackground/Aims: In this study, we aimed to evaluate the histopathological effects of thymoquinone treatment of the nasal mucosa in a rabbit model of allergic rhinitis, and we compared its effects with those of nasal mometasone furoate. Methods: A total of 24 male New Zealand rabbits were used. The animals were randomly assigned to one of four groups. Group 1 received no treatment, while group 2 underwent ovalbumin (OVA) sensitization only. Group 3 was the study group; after OVA sensitization, the rabbits were treated with intranasal thymoquinone. The group 4 rabbits received mometasone furoate for 7 days after OVA sensitization. Mucosal structures were stained with hematoxylin and eosin, while toluidine blue was used to stain mast cells. Apoptosis was evaluated using a TUNEL assay. Results: In the positive control groups, including the thymoquinone and intranasal mometasone furoate groups, intraepithelial and submucosal inflammation and goblet cell hypertrophy were significantly decreased compared to group 2 (p < 0.001). The cilial structure was normal, as was the chondrocyte structure in both treatment groups. Conclusion: This is the first study to evaluate the histopathological effects of thymoquinone in an allergic rhinitis model. Thymoquinone reduced allergic inflammation and may be valuable for treating allergic rhinitis. However, additional studies are needed. (C) 2016 S. Karger AG, BaselÖğe Effect of n-butyl-2-cyanoacrylate on the tensile strength and pressure resistance of tracheal anastomoses ex vivo(Sage Publications Ltd, 2015) Biçer, Yusuf Özgür; Köybaşı, Serap; Kazaz, Hasan; Seyhan, SinanObjectives To investigate the effects of n-butyl-2-cyanoacrylate on tracheal anastomoses in terms of increased tension and intraluminal pressure ex vivo. Study Design Ex vivo experimental study. Setting Tertiary referral center (Department of Otolaryngology). Subjects and Methods Thirty sheep tracheas were used. Four cartilage rings were resected from the tracheas that were 20 cm in length. End-to-end anastomoses were performed by using Vicryl only (group 1), Vicryl and n-butyl-2-cyanoacrylate (group 2), and n-butyl-2-cyanoacrylate only (group 3). The amount of force to break off the anastomosis and the amount of intraluminal pressure to arouse air leakage through the anastomosis were measured. Results The mean force required to break off was 171.9 29.7 N in group 1, 164.8 +/- 26 N in group 2, and 13.52 +/- 2 N in group 3. The mean force required to break off in group 3 was significantly lower than those in groups 1 and 2 (P = .008 and P = .008, respectively). The mean pressure required to cause air leakage was 49.6 +/- 9.1 mm Hg in group 1, 113 +/- 14.4 mm Hg in group 2, and 15 +/- 4.2 mm Hg in group 3. Group 2 was found to be more resistant to intraluminal pressure than groups 1 and 3 (P = .008 and P = .008, respectively). Conclusion n-Butyl-2-cyanoacrylate had no significant effect on tensile strength. However, its application on the suture line provided extra pressure resistance ex vivo. We believe that further studies need to be conducted to investigate its long-term effects and histological impact on tracheal anastomoses in vivo.Öğe Investigation of the relationship between trefoil factor family peptides and sinonasal inflammation(Springer India, 2023) Seyhan, Sinan; Biçer, Yusuf Özgür; Şanal, Serap Köybaşı; Astarcı, Hesna MüzeyyenThe trefoil factor family (TFF) is a relatively new family of peptides. In some studies, an association between trefoil factors and inflammatory diseases of the nasal and paranasal sinuses has been suggested. However, it is still not clear whether there is a relationship between trefoil peptides and inflammation of the respiratory tract. The aims of this study are to determine the presence of TFF1, TFF2, and TFF3 in the nasal mucosa and investigate their relationships with inflammation by using rat models of various sinonasal inflammations. Nasal tampon, lipopolysaccharide, and ovalbumin were used to generate rat models of sinonasal inflammation, i.e., rhinosinusitis and allergic rhinitis. The study was conducted on seventy rats in seven groups, each with ten rats: four groups with rhinosinusitis, two groups with allergic rhinitis, and a control group. Histological evaluation of sinonasal mucosa from all rats was performed, and Trefoil factors were investigated using immunohistochemical methods. All three TFF peptides were detected in rat nasal mucosa by histological evaluation. No significant differences in the trefoil factor scores were observed among the study groups. A significant correlation between the TFF1 and TFF3 scores and loss of cilia was identified (p < 0.05). In conclusion, no direct relationship between sinonasal inflammation and TFF scores was observed. However, a possible association between the TFF and epithelial damage or regeneration in sinonasal inflammation can be suggested based on the correlation observed between the TFF1 and TFF3 scores and scores of cilia loss.Öğe Nasal type natural killer T-cell lymphoma involving nasooropharynx and larynx(2014) Köybaşı, Serap; Seyhan, Sinan; Biçer, Yusuf Özgür; Üner, Ayşegül; Yeşilırmak, AysunLenfoma, baş boyun bölgesini tutan yassı hücreli olmayan malign tümörlerden biridir. Bu bölgedeki lenfomalar çoğunlukla B hücre tipi kaynaklıdır ve genellikle Waldeyer halkasında görülür. Bu yazıda, nazo-orofarenksten larenkse uzanan pri- mer nazal tip doğal katil T hücreli lenfoma tanılı 45 yaşında bir kadın olgu sunuldu. Nadir görülen bu olgu, kötü prognoza sahiptir.Öğe Outcomes from cyanoacrylate use in tracheal anastomosis in a rat model(Sage Publications Ltd, 2015) Biçer, Yusuf Özgür; Köybaşı, Serap; Seyhan, Sinan; Fırat, Tülin; Kazaz, HasanObjectives We aimed to investigate the histologic effects of N-butyl-2-cyanoacrylate (NBCA) and metacryloxisulfolane (MS) comonomer on tracheal anastomosis in vivo on a rat model of tracheal resection and end-to-end anastomosis. Study Design Animal experiment. Rat model of tracheal resection and end-to-end anastomosis. Setting Animal laboratory. Subjects and Methods Tracheal resection and end-to-end anastomosis were performed in 28 Wistar albino rats. Rats were randomly divided into 2 groups: control (n = 14), in which anastomoses were performed with 8/0 Vicryl, and study (n = 14), in which NBCA and MS comonomer was used in addition to 8/0 Vicryl to perform anastomosis. Seven rats from each group were sacrificed on day 7 and the remaining on day 28 for gross and histologic examination. Results Indurations at the site of anastomoses were detected in all rats of study group. Slight narrowing at the site of anastomosis was observed in 8 rats of the study group and in only 1 of the control group. The difference was significant on day 28 (P = .021). The inflammatory cell infiltration was significantly increased in the study group on day 28 (P = .022). Epithelial regeneration was found to be worse in the study group on day 28 (P = .022). Conclusions The use of NBCA and MS comonomer increased the inflammation in rat tracheal anastomosis with respect to inflammatory cell count and epithelial regeneration. So the use of NBCA and MS comonomer in tracheal surgery cannot be recommended yet in the light of our data.Öğe Pilomatrixoma Localized in the Right Preauricular Region(2016) Şereflican, Murat; Şereflican, Betül; Seyhan, Sinan; Göksügür, Nadir; Yılmaz, FahriPilomatrixoma is a benign appendageal tumor derived from hair matrix cells which is also known as calcifying epithelioma of Malharbe. It usually appears as a solitary, asymptomatic, firm nodule. It is most common on the face and neck, but is occasionally found somewhere else on the body. A 18-year-old female was referred to dermatology clinic with a two year history of painless subcutaneous nodule in front of her right ear. The computed tomography imaging study demonstrated 8.5x12 mm subcutaneous mass lesion with calcification. Histopathological examination of the excised material showed the presence of basaloid cells associated with phantom cells, with areas of multinucleated giant cells, pigmented macrophages and widespread dystrophic calcification compatible with pilomatrixoma. In this case, we wished to present a patient who underwent excisional biopsy as a result of computed tomography imaging and whose pathological result was reported to be pilomatrixoma. Pilomatrixoma has long been supposed to be an infrequent tumor, but it may be more common than previously realized, so the clinicians must keep in mind the diagnosis of pilomatrixoma for subcutaneous nodules on the head and neck.Öğe Salivary alpha-amylase levels in vertigo: can it be an autonomic dysfunction?(Sage Publications Inc, 2018) Korkmaz, Tanzer; Biçer, Yusuf Özgür; Serin, Erdinç; Seyhan, Sinan; Şanal, Serap KöybaşıWe aim to demonstrate possible autonomic dysfunction based on salivary alpha-amylase measurements during and after the vertigo attacks associated with Meniere disease (MD) and benign paroxysmal positional vertigo (BPPV). Patients admitted to the emergency room with a diagnosis of vertigo attacks caused by either MD (n = 15) or BPPV (n = 9) constituted the study groups. The control group (n = 10) consisted of volunteer patients admitted to the emergency department with minor soft-tissue trauma. The first saliva samples were obtained immediately during the attacks and the second and third samples were obtained on the third and fifteenth days of the attack, respectively. In the controls, the first sample was obtained after admission to the hospital and the second sample was obtained on the third day. Salivary alpha-amylase levels were evaluated. The difference between salivary alpha-amylase levels in patients with MD and BPPV was not significant. The amylase value measured early after the BPPV attack was significantly lower than that of the controls (p = 0.008). Although not significant, an undulating pattern of salivary alpha-amylase levels was observed with both diseases. An autonomic imbalance could be partly demonstrated by salivary alpha-amylase measurement early after the attack in patients with BPPV. Therefore, amylase may be a promising marker that is worth further investigation.Öğe Satisfaction in rhinoplasty: the possible impact of anxiety and functional outcome(Springer, 2018) Köybaşı, Serap; Biçer, Yusuf Özgür; Seyhan, Sinan; Kesgin, SelcanRhinoplasty is a complex but commonly applied surgical procedure. Patient satisfaction is the least discussed but one of the most important determinants of surgical success. Evaluation of the patient satisfaction together with surgeon satisfaction were the main goals of this study. The roles of anxiety, gender, age and follow-up period were also studied. 53 eligible patients operated by the first two authors within the previous 2 years were enrolled in the study. The medical records were reviewed for demographic data as well as the details of the surgical procedure. Functional and esthetic satisfactions of the patients were evaluated by VAS and ROE respectively. Surgeon satisfaction was evaluated by VAS in crosswise manner. Anxiety was measured by STAI_s and STAI_t scales. The analysis concerning esthetic results as well as functional results did not reveal any significant difference between the two surgeons (p = 0.132, p = 0.43 respectively). ROE scores were significantly different among patients with "good" and "very good" functional results. The difference between surgeon satisfaction and patient satisfaction was found to be insignificant (p = 0.273). Correlation analysis yielded a positive correlation between STAI_I and STAI_II (Pearson r = 0.335, p = 0.014) but not between STAI scores and ROE scores. Moreover, there was no relation between anxiety scores and the functional results. Likely, gender as well as age, follow-up, and surgical technique were not found to have any effect on patient satisfaction either. Patient satisfaction is preferential in rhinoplasty. In our patient series, patient satisfaction was shown to be correlated with functional outcome but not with surgeon satisfaction. Anxiety was not found to have a significant impact on results of rhinoplasty. Our results should be interpreted cautiously keeping in mind that our patients' primary drive for rhinoplasty was functional.Öğe Trefoil faktör ailesi peptidlerinin sinonazal inflamasyonla ilişkisinin bir hayvan modeli kullanılarak araştırılması(Bolu Abant İzzet Baysal Üniversitesi, 2016) Seyhan, Sinan; Biçer, Yusuf ÖzgürBurun ve paranazal sinüslerin inflamatuar hastalıkları dünya çapında sık tanı konulan hastalıklardandır. Trefoil faktör ailesi nispeten yeni bir protein ailesidir. Yapılan bazı çalışmalarda Trefoil faktörlerin nazal ve paranazal sinüs inflamatuar hastalıkları ile ilişkili olabileceği ileri sürülmüştür. Ancak solunum yolu inflamasyonu ile trefoil peptidler arasındaki ilişki henüz net değildir. Bu çalışmanın amacı, sıçanlar üzerinde çeşitli sinonazal inflamasyon modelleri kullanılarak, nazal mukozada TFF1, 2 ve 3'ün varlığı ve bunların inflamasyon ile ilişkisinin araştırılmasıdır. Sinonazal inflamasyon modelleri oluşturmak için nazal tampon, lipopolisakkarit ve ovalbumin uygulaması yapılarak sıçanlarda rinosinüzit ve alerjik rinit oluşturuldu. Gruplarda on adet sıçan olacak şekilde, dört adet rinosinüzit, iki adet alerjik rinit ve bir adet kontrol grubu oluşturuldu. Deney sonunda bütün sıçanların sinonazal mukozaları histolojik olarak değerlendirildi ve Trefoil faktörlerin incelenmesi için immünohistokimyasal yöntem kullanıldı. Histopatolojik değerlendirme sonunda sıçan nazal mukozasında her üç TFF peptidinin de varlığı tespit edildi. Trefoil faktörlerin skorlarının deney grupları arasında anlamlı farklılık göstermediği görüldü. Ancak Trefoil faktörler ile silia kaybı arasında istatistiksel olarak anlamlı korelasyon olduğu saptandı (p<0,05). Sonuç olarak sinonazal inflamasyon ile TFF skorları arasında doğrudan bir ilişki gösterilememiştir. Fakat TFF skorlarının silia kaybı ile korelasyonu TFF'nin sinonazal inflamasyonlarda epitel hasarı veya rejenerasyonuyla ilişkili olabileceğini gösterebilir.
