Person: ŞENTÜRK, EROL
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Publication Open Access Effect of Radiofrequency on DNA Damage and Oxidative Status in Patients with Turbinate Hypertrophy.(2019-11-01) Tugrul, S; Koçyiğit, A; Senturk, E; Doğan, Remzi; Eren, SB; Ozturan, ORHAN; Kesgin, S; ŞENTÜRK, EROL; TUĞRUL, SELAHATTİN; DOĞAN, REMZI; EREN, SABRİ BAKİ; ÖZTURAN, ORHAN; KOÇYİĞİT, ABDÜRRAHİMThe radiofrequency devices that are used generate radiofrequency in the frequency range of 1.5 and 2.5 MHz. This study aims to demonstrate whether systematic oxidative status and DNA are influenced in this frequency range. In study, 27 patients who received radiofrequency treatment on inferior turbinate as they were diagnosed with inferior turbinate hypertrophy. DNA damage was assessed by alkaline comet assay in peripheral lymphocyte cells. Plasma levels of total antioxidant status (TAS), total oxidative status (TOS) were determined by using an automated measurement method and oxidative stress index (OSI) was calculated (OSI was calculated as: OSI = (TOS/TAS) × 100). There were increased in the OSI and TOS values on days 1 and 15 as compared to the samples taken before the radiofrequency administration. Significant decreases were seen in TAS values on days 1 and 15. As for the DNA damage, no significant differences were found on day 15 compared to the preoperative values even though there was a statistically insignificant increase on day 1. Administration of radiofrequency radiation on inferior turbinates results in increased oxidative stress in the acute period and a decrease in the anti-oxidative system. Although this effect causes a slight increase in the DNA damage in the early post-operative period, the damage is restored to the pre-operative levels on day 15. Therefore, we believe that a more conservative approach should be selected for radiofrequency treatment instead of using it routinely.Publication Open Access DNA damage and oxidative status in PFAPA syndrome(2015-10-01) TUGRUL, Selahattin; Dogan, REMZİ; Kocyigit, ABDÜRRAHİM; Torun, EMEL; SENTURK, EROL; Ozturan, ORHAN; TUĞRUL, SELAHATTİN; DOĞAN, REMZI; KOÇYİĞİT, ABDÜRRAHİM; TORUN, EMEL; ŞENTÜRK, EROL; ÖZTURAN, ORHANObjective: PFAPA syndrome is a clinical entity of unknown etiology which presents with periodic episodes of fever, aphthous stomatitis, tonsillitis or pharyngitis, and cervical adenitis. In this study we investigated DNA damage and the oxidative stress parameters in patients diagnosed with PFAPA, to elucidate the underlying pathophysiological mechanism of this syndrome. Methods: Thirty-one patients diagnosed with PFAPA (Group 1), 22 patients diagnosed with normal tonsillitis or pharyngitis (Group 2), and 20 healthy volunteers (Group 3) were included in our study. Heparinized peripheral blood samples were drawn from all patients and volunteers. DNA damage was assessed by single cell alkaline electrophoresis assay in peripheral mononuclear leukocytes. Plasma levels of total antioxidant status (TAS) and total oxidative status (TOS) were determined by using a novel automated measurement method, and oxidative stress index (OSI) was calculated. Results: DNA damage in the mononuclear leukocytes of Group 1 was significantly higher than that of Group 2 and Group 3. The oxidative stress parameters revealed that the TOS and OSI values of Group 1 were significantly higher than those of Group 2 and Group 3. TAS values of Group 1 were significantly lower than those of Group 2 and Group 3. Correlation analysis of Group 1 demonstrated a significant correlation between TOS, one of the oxidative stress parameters, and DNA damage. Correlations between DNA damage and C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR) values were also significant. Conclusion: Our study indicated that both the inflammatory and the oxidative stress parameters were significantly increased in patients with PFAPA syndrome, accompanied by a significant positive correlation between DNA damage and oxidative stress.Publication Open Access Schwannoma Located in Nasopharyngeal Region.(2016-01-01) AKSOY, FEYZA MÜBERRA; SENTURK, EROL; Ozturan, ORHAN; YENIGUN, A; AKSOY, FADLULLAH; YENİGÜN, ALPER; ŞENTÜRK, EROL; ÖZTURAN, ORHANSchwannoma is a tumor which has neuroectoderm origins, is hard, well-circumscribed, encapsulated, and slow growing benign cranial tumor, and may autonomously grow out of the nerve sheath of peripheral nerves. It is mostly seen in the head and neck region. In the paranasal sinus and nose areas, it is seen at a rate of 4%. The diagnosis is mostly made after histopathological examination. In this paper, a Schwannoma case observed in the nasopharyngeal region was presented in a 20-year-old female who had complaints of sleeping with open mouth, snoring, foreign body feeling in throat, and swallowing difficulties. The tumor was extracted via transoral approach. No recurrence was observed during follow-up over the next year. This case presentation is presented for the first time in the literature in English.Publication Open Access A Rare and Unexpected Reason for Unilateral Epistaxis: Nasal Septal Schwannoma(2020-10-01T00:00:00Z) YENİGÜN, Alper; KULAKSIZ, YASİN; KIRAN, Tuğçe; ŞENTÜRK, Erol; Aksoy, Fadlullah; ÖZTURAN, ORHAN; YENİGÜN, ALPER; KULAKSIZ, YASİN; KIRAN, TUĞÇE; ŞENTÜRK, EROL; AKSOY, FADLULLAH; ÖZTURAN, ORHANNasal septal schwannoma is a rare tumor. It causes complaints such as nasal congestion, nosebleeds, and headaches. There are many diseases such as nasal polyps, antrochoanal polyp, chronic rhinosinusitis, concha bullosa, inverted papilloma, and retention cyst with schwannoma diagnosis. The diagnosis is made histopathologically, and the treatment is surgery. In this case report, we presented a male patient with septal schwannoma who had nasal obstruction for a year and reviewed the last 20 years of literature on nasal schwannoma.