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Öğe Deneysel sepsis modelinde glutatyon, myeloperoksidaz, plazma ve doku mda düzeylerine N-asetilsistein ve erdostein’in etkilerinin karşılaştırılması(2009) Ayan, Murat; Gül, Mehmet; Köylü, Ramazan; Seydanoğlu, Abdüsselam; Erdem, Sami; Köylü, Öznur; Cander, BaşarAMAÇ: Deneysel sepsis modelinde antioksidan bir ajan olan N-asetilsistein ve Erdostein’in serbest oksijen radikalleri üzerine olan etkileri ve sepsisin neden olduğu organ fonksiyon bozuklukları ve akciğer doku hasarını önlemedeki rolü araştırıldı. METOD: Çalışmada Sprague-Dawley cinsi 40 adet rat kullanıldı. Ratlar randomize 10’arlı gruplara ayrıldılar. Ratlarda çekum ligasyon perforasyon yöntemiyle sepsis oluşturuldu. Sham grubu(grup 1), sepsis grubu(grup 2), sepsis N-asetisistein (grup 3) ve sepsis Erdostein (grup 4) şeklinde 4 grup oluşturuldu. N-asetilsistein grubunda ilaçlar (20mg/kg/gün), çekum perforasyonundan sonra, 0. 8. ve 16. saatlerde verildi. Erdostein grubunda ise ilaçlar(20mg/kg/gün) 0.ve 12. saatlerde verildi. 24. saatte lökosit, eritrosit glutatyon, lökosit myeloperoksidaz ve plazma malonildialdehit değerlerinin tayini için kan örnekleri ve doku incelemeleri için deneklerin ölümünü takiben akciğerden doku örnekleri alındı. BULGULAR: Gruplar karşılaştırıldığında grup 3’te grup 2’ye göre; lökosit, lökosit myeloperoksidaz ve akciğer doku malonildialdehit değerleri açısından istatistiksel olarak anlamlı fark saptanırken (P0.05), eritrosit glutatyon, plazma malonildialdehit değerleri açısından anlamlı fark saptanmadı (P0.05). Grup 4’te grup 2’ye göre eritrosit glutatyon, lökosit myeloperoksidaz, plazma malondialdehit ve akciğer doku malonildialdehit değerleri açısından karşılaştırıldığında istatistiksel olarak anlamlı tespit edilirken (P0.05), lökosit değerleri açısından anlamlı tespit edilmedi (P0.05). SONUÇ: Deneysel sepsis modelinde antioksidan bir ajan olan N-asetilsistein ve Erdostein’in düşük doz uygulanmasında eritrosit glutatyon, lökosit myeloperoksidaz düzeylerine, akciğer fonksiyonlarına, plazma ve doku malonildialdehit seviyelerine olumlu etkileri mevcuttur. Düşük doz N-asetilsistein ve Erdostein tedavisinin, sepsise bağlı organ fonksiyon anormalliklerini azaltmasına rağmen, bu etki histopatolojik olarak akciğer dokusuna yansımamıştır.Öğe Effect of Chronic Regular Exercise on Serum Ischemia-Modified Albumin Levels and Oxidative Stress in Type 2 Diabetes Mellitus(TAYLOR & FRANCIS INC, 2011) Kurban, Sevil; Mehmetoglu, Idris; Yerlikaya, Humeyra F.; Gonen, Sait; Erdem, SamiObjectives. Our aim was to determine the effect of chronic regular exercise on ischemia-modified albumin (IMA) levels and oxidative stress in type 2 diabetes mellitus (DM). Design and methods. Sixty patients with type 2 DM were randomly divided into two groups as exercise (17 M, 13 F) and non-exercise (12 M, 18 F) groups, each consisting of 30 patients. The exercise group underwent a 3-month aerobic regular exercise consisting of moderate-intensity power walking. The non-exercise subjects remained sedentary throughout the study period. Serum total antioxidant status (TAS), total oxidant status (TOS), and IMA levels of the groups were determined at baseline and 3 months later. Results. There was no significant change in TOS and IMA levels of exercise group but TAS levels were significantly increased (p < 0.05). Also, postexercise systolic (p < 0.001) and diastolic (p < 0.05) blood pressures of the exercise group were significantly lower than the baseline values. In addition, there was no significant change in TAS and TOS levels of the non-exercise group; however, IMA levels were significantly increased (p < 0.01). Conclusion. We have shown, for the first time, that exercise prevents increase in IMA levels in type 2 DM which might have resulted from increased levels of TAS and reduces the risk of ischemia in these patients. These findings show that chronic exercise is beneficial in the prevention of oxidative stress in patients with type 2 DM as documented by decreased IMA levels.Öğe The effect of n-acetyl cysteine on serum glutathione, tnf-? and tissue malondialdehyde levels in the treatment of sepsis(2011) Gül, Mehmet; Ayan, Murat; Seydanoğlu, Abdüsselam; Cander, Başar; Girişgin, Sdık; Erayman, İbrahim; Erdem, SamiAMAÇ Bu çalışmada, sepsis tedavisinde antioksidan bir ajan olan N-asetilsistein’in (NAC) serbest oksijen radikalle ri düzeylerine olan etkileri araştırıldı. GEREÇ VE YÖNTEM Çalışmada ağırlıkları 180-200 gr arasında değişen 30 adet Sprague-Dawley cinsi dişi sıçan kullanıldı. Sıçanlar rastge le 10’arlı 3 gruba (Grup I: Sham, Grup II: Sepsis ve Grup III: Sepsis NAC) ayrıldı. Grup I’e yalnızca laparotomi yapıldı. Grup II ve Grup III’de çekal ligasyon perforasyon (ÇLP) yöntemiyle sepsis modeli oluşturuldu. Grup III’e oral yoldan 0., 8. ve 16. saatte 20 mg/kg/gün NAC verildi. 24. saatte eritrosit glutatyon (GSH), serum TNF-? değerle rinin tayini için kan örnekleri ile histopatolojik inceleme ve doku malondialdehid (MDA) tayini için akciğer, karaciğer ve böbrek doku örnekleri alındı. BULGULAR Grup III’de TNF-?, eritrosit GSH ve böbrek doku MDA de ğerleri diğer gruplarla karşılaştırıldığında istatistiksel açı dan farklılık saptandı (p0,05). Karaciğer doku MDA de ğerleri ve akciğer, karaciğer ve böbrek dokularının histo patolojik inceleme sonuçları açısından ise gruplar arasında farklılık bulunmadı (p0,05). SONUÇ Sepsis oluşturulan sıçanlara verilen NAC tedavisinin eritro sit GSH, serum TNF-? düzeylerine, akciğer fonksiyonları na, böbrek doku MDA seviyelerine olumlu etkileri saptan dı. Buna karşılık bu olumlu etkinin histopatolojik düzelmeye yansımadığı görüldü. NAC’nin sepsis tedavisinde olası yarar lı etkilerini ortaya koymak için yeni çalışmalara ihtiyaç vardır.Öğe The effect of N-acetyl cysteine on serum glutathione, TNF-alpha and tissue malondialdehyde levels in the treatment of sepsis(TURKISH ASSOC TRAUMA EMERGENCY SURGERY, 2011) Gul, Mehmet; Ayan, Murat; Seydanoglu, Abdusselam; Cander, Basar; Girisgin, Sadik; Erayman, Ibrahim; Erdem, SamiBACKGROUND The aim of this study was to investigate the effects of N-acetyl cysteine (NAC) on the levels of reactive oxygen species in sepsis. METHODS In this study, 30 Sprague-Dawley female rats weighing 180-200 g were used. Rats were randomized into three groups, each containing 10 rats, as follows: Group I: Sham, Group II: Sepsis and Group III: Sepsis+NAC. Group I underwent only laparotomy. In Groups II and III, sepsis was induced by cecal ligation and perforation (CLP) technique. NAC (20 mg/kg/day) was administered orally to Group III at 0, 8 and 16 hours. At the 24th hour, tissue and blood samples were taken for erythrocyte glutathione (GSH) and serum tumor necrosis factor (TNF)-alpha levels, histopathological determination, and lung, liver and kidney tissue malondialdehyde (MDA) analyses. RESULTS Group III was significantly different from the other groups with respect to erythrocyte glutathione, serum TNF-alpha and kidney MDA levels (p<0.05). There was no significant difference between the groups regarding liver MDA levels and histopathological parameters for lung, liver and kidney (p>0.05). CONCLUSION NAC treatment had beneficial effects on erythrocyte GSH, serum TNF-alpha, lung function, and kidney MDA levels in sepsis-induced rats. However, this beneficial effect was not confirmed as histopathological improvement. Further research is needed to prove the effect of NAC in sepsis treatment.Öğe Ghrelin, resistin and leptin levels in patients with metabolic syndrome(2011) Koç, Fatih; Tokaç, Mehmet; Kocabaş, Volkan; Kaya, Coşkun; Büyükbaş, Sadık; Erdem, Sami; Karabağ, TurgutAmaç: Bu çalışmada metabolik sendromlu (MS) hastalar ile sağlıklı kontroller arasında açlık ghrelin, leptin ve resistin düzeylerinin karşılaştırılması amaçlanmıştır. Metod: Çalışmaya 21 MS hastası (7 erkek; ortalama yaş, 444) ve 17 sağlıklı kontrol (8 erkek; ortalama yaş 433) alınmıştır. MS tanısı Ulusal Kolesterol Eğitim Programı (NCEP) Erişkin Tedavi Paneli (ATP) III kriterlerine göre tanımlandı. MS karşılama kriterlerinden en az 3’üne sahip olan ve beden kitle indeksi (BKI) 30 kg/m² olan hastalar MS grubuna seçildi. Sağlıklı gönüllüler arasında BKI 30 kg/m² olanlar kontrol grubu olarak seçildi. Plazma ghrelin, leptin ve resistin düzeyleri ELISA yöntemi ile ölçüldü. Bulgular:Ghrelin düzeyleri MS ve kontrol grupları arasında benzerdi. Ghrelin ve Leptin seviyeleri ile BKİ arasında negatif bir ilişki tespit edildi (r-.54, P.01 ve r-.56, p 0.009, sırasıyla). Resistin düzeyleri kontrol grubu ile MS arasında benzer bulundu. Leptin düzeyleri kontrol grubuna göre MS grubunda (3517 ng/ml ve 148 ng/ml, p 0.001) anlamlı derecede daha yüksek bulundu. Leptin düzeyleri ile BKİ arasında pozitif korelasyon vardı (r 0.56; p 0.008). Biz MS grubunda leptin düzeylerinin kontrol grubuna göre daha yüksek olduğunu gösterdik. Ancak, ghrelin ve resistin düzeyleri kontrol grubuna benzerdi. Sonuç: Sonuç olarak biz leptin düzeyleri ile BKİ arasında pozitif bir ilişki olduğunu ve ghrelin seviyeleri ile negatif ilişkili olduğunu gösterdik.Öğe Ischemia-modified albumin and total antioxidant status in patients with slow coronary flow: a pilot observational study(TURKISH SOC CARDIOLOGY, 2011) Koç, Fatih; Erdem, Sami; Altunkaş, Fatih; Özbek, Kerem; Gül, Enes Elvin; Kurban, Sevil; Taşyürek, ErkanObjective: Slow coronary flow (SCF) is defined as late opacification in the epicardial coronary arteries without significant stenosis. The underlying mechanism of SCF is similar to coronary atherosclerosis. Free radical damage may be responsible for the pathology. In this study, we aimed to investigate ischemia-modified albumin (IMA) levels and differences with regard to total antioxidant status (TAS) between patients with normal coronary arteries and patients with SCF without significant stenosis. Methods: Thirty patients who were diagnosed with SCF using coronary angiography were included in this cross-sectional observational study 113 male; mean age, 56 10 years). The control group consisted of 30 patients who had normal coronary arteries as shown by coronary angiography (13 male; mean age, 53 11 years). In this study, we assessed serum IMA levels, albumin-adjusted IMA and TAS. The Student t-test was used to compare serum IMA levels and TAS between the two groups. Pearson's correlation test was used to explore the relationship between TAS and serum IMA levels. Results: Serum IMA levels and albumin-adjusted IMA were similar in both groups (p=0.432, p=0.349). The mean value of TAS was significantly lower in the SCF group compared to control group (p=0.011). The TAS was negatively correlated with the levels of IMA and albumin-adjusted IMA in the SCF group (r=-0.457, p=0.011; r=-0.509, p=0.004). Conclusion: This study shows that serum IMA levels and albumin-adjusted IMA were similar between the groups, however the mean value of TAS was significantly lower in the SCF group compared to control group and negatively correlated with IMA. These results are important in terms of understanding the pathophysiological basis of SCE (Anadolu Kardiyol Derg 2011; 11:582-7)Öğe Relationship Between Iron-Deficiency Anemia and Periodontal Status in Female Patients(AMER ACAD PERIODONTOLOGY, 2009) Enhos, Sukru; Duran, Ismet; Erdem, Sami; Buyukbas, SadikBackground: The aim of this study was to evaluate the periodontal status of patients with iron-deficiency anemia (IDA) and the correlation of changes in serum and gingival crevicular fluid (GCF) ferritin levels after periodontal therapy. Methods: Nineteen female patients with anemic hematologic values were classified as group A, and 20 healthy females with normal hematologic values were classified as group B. After group A was recruited, group B was enrolled with patients who had similar gingival indices as group A. At baseline and the 3-month follow-up visit, clinical periodontal indices and hematologic parameters were recorded, and GCF samples were taken. All patients received an oral hygiene-improvement session followed by scaling, and sites with >4-mm probing depths received root planing. At the 3-month follow-up visit, all measurements and analyses were repeated. Results: During the follow-up period, all clinical indices decreased in both groups (P<0.05), but the gingival index in group A did not change. The GCF ferritin concentration showed statistically significant decreases (P<0.05), but total amounts of ferritin in GCF did not change. No significant correlation was found between serum and GCF ferritin levels. Conclusion: The findings of this study showed that changes in serum ferritin levels did not correlate with the GCF ferritin levels, and IDA was not a direct risk factor for periodontal diseases. J Periodontol 2009;80:1750-1755.Öğe Relationship Between L-arginine/asymmetric Dimethylarginine, Homocysteine, Folic Acid, Vitamin B Levels, and Coronary Artery Ectasia(Lippincott Williams & Wilkins, 2010) Koç, Fatih; Ardıç, İdris; Erdem, Sami; Kalay, Nihat; Özbek, Kerem; Yarlıoğlueş, Mikail; Ceyhan, Köksal; Çelik, Ataç; Kadi, Hasan; Taner, Alpaslan; Şahin, Şemsettin; Önalan, Orhan; Kaya, Mehmet GüngörBackground Coronary artery ectasia (CAE) is characterized by an abnormal dilatation of the coronary arteries. The ratio of L-arginine/asymmetric dimethylarginine (ADMA) and homocysteine are important factors for endothelial function. In this study, we investigate the ratio of L-arginine/ADMA, homocysteine, and folic acid/vitamin B levels in patients with CAE. Methods Forty patients diagnosed with CAE using coronary angiography were included in the study (24 male; mean age, 56 +/- 11 years). The control group consisted of 30 patients who had normal coronary arteries as determined by coronary angiography (11 male; mean age, 54 +/- 8 years). The ratio of L-arginine/ADMA and plasma homocysteine was measured using high-performance liquid chromatography. Results The L-arginine/ADMA ratio and L-arginine levels were significantly lower in the CAE group compared with the control group (110 +/- 27 vs. 149 +/- 77, P = 0.02 and 157 +/- 32 mu mol/l vs. 187 +/- 59 mu mol/l, P = 0.02, respectively). Plasma ADMA levels were similar in the two groups. Patients with CAE had higher plasma homocysteine levels (P = 0.01). Plasma folic acid, vitamin B6, and vitamin B12 levels were similar between the two groups. Conclusion This study shows that patients with CAE have a lower L-arginine/ADMA ratio and higher plasma homocysteine levels. These results show a potential relationship between endothelial dysfunction and CAE.Öğe Serum Asymmetric Dimethylarginine Levels in Normotensive Obese Individuals(Int Scientific Information, Inc, 2010) Koç, Fatih; Tokaç, Mehmet; Erdem, Sami; Kaya, Coşkun; Ünlü, Ali; Karabağ, Turgut; Vatankulu, Mehmet Akif; Demir, Kenan; Ayhan, Selim; Kaya, AhmetBackground: Obesity is associated with an increased risk of developing insulin resistance, hyperinsulinemia, glucose intolerance, dyslipidemia, hypertension, premature atherosclerosis, and coronary artery disease. This study is designed to compare serum asymmetric dimethylarginine (ADMA) levels between obese individuals and controls. Material/Methods: Fifty volunteers, 30 obese (13 men; mean age, 40 +/- 11 years) and 20 healthy controls (13 men; mean age, 44 +/- 10 years) were enrolled to this study. Measurement of ADMA was accomplished by high performance liquid chromatography. Results: The mean body mass index of the obese group was significantly higher than that of the control group (35 +/- 4 vs 26 +/- 3 kg/m(2); P=.001). The mean waist circumference of the obese subjects was also significantly higher compared with controls (111 +/- 11 vs 93 +/- 10 cm; P=.001). No significant difference was found concerning age, sex, blood pressures, and biochemistry parameters. Serum ADMA levels were significantly higher in obese individuals compared with healthy controls (5.4 +/- 3.3 vs 3.1 +/- 1.8 mu mol/L; P=.006). A weak but significant correlation was identified between serum ADMA concentration and the waist circumference (r=0.282, P=.047). Conclusions: The results of the present study demonstrated that serum ADMA levels of normotensive obese individuals were significantly higher than healthy controls. Increased ADMA concentrations observed only in the obese group were deemed to be important regarding the development future of cardiovascular disease in the future.
