Yazar "Evliyaoglu, Osman" seçeneğine göre listele

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    Ameliorating effects of CAPE on oxidative damage caused by pneumoperitoneum in rat lung tissue
    (E-Century Publishing Corp, 2014) Davarci, Isil; Alp, Harun; Ozgur, Tumay; Karcioglu, Murat; Tuzcu, Kasim; Evliyaoglu, Osman; Motor, Sedat
    We investigated the biochemical and histopathological effects of caffeic acid phenethyl ester (CAPE) against oxidative stress causing lung injury induced by pneumoperitoneum. Twenty-eight rats were selected at random and seven rats were assigned to each of the following groups. The control group (S) was subjected to a sham operation without pneumoperitoneum. The other groups were subjected to CO2 pneumoperitoneum 15 mmHg for 60 min. The laparoscopy group (L) had no additional drugs administered, the laparoscopy + alcohol (LA) group had 1 ml of 70% ethyl alcohol administered 1 h before the desufflation period, and the laparoscopy + CAPE (LC) group had CAPE administered at 10 mu mol/kg 1 h before the desufflation period. The total oxidative status levels of lung and plasma were significantly increased in the LA group as compared with the LC and S group. When the LC group was compared with the L group, there was a decrease in the level of total oxidant status and increase in the levels of total antioxidant status and paraoxonase in lung tissue. The level of total antioxidative status in the S group was increased compared with the L group in lung tissue and bronchoalveolar lavage fluid. TNF-alpha and IL-6 were found significantly elevated in the L group compared with the LC and S groups in bronchoalveolar lavage fluid. There was a similar increase in plasma levels of IL-6. These results were supported by histopathological examination. CAPE was found to considerably reduce oxidative stress and inflammation induced by pneumoperitoneum.
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    The anti-oxidant and anti-apoptotic effects of nebivolol and zofenopril in a model of cerebral ischemia/reperfusion in rats
    (Pergamon-Elsevier Science Ltd, 2012) Uzar, Ertugrul; Acar, Abdullah; Evliyaoglu, Osman; Firat, Ugur; Kamasak, Kagan; Gocmez, Cuneyt; Alp, Harun
    The aim of this experiment was to investigate whether nebivolol and zofenopril have protective effects against oxidative damage and apoptosis induced by cerebral ischemia/reperfusion (I/R). There were seven groups of rats, with each containing eight rats. The groups were: the control group, I/R group, I/R plus zofenopril, I/R plus nebivolol, I/R plus nebivolol and zofenopril. zofenopril only and nebivolol only. Cerebral I/R was induced by clamping the bilateral common carotid artery and through hypotension. The rats were sacrificed 1 h after ischemia, and histopathological and biochemical analyses were carried out on their brains. The total antioxidant capacity was evaluated by using an automated and colorimetric measurement method developed by Erel. I/R produced a significant increase in the levels of total oxidant status and malondialdehyde levels, the number of caspase-3 immunopositive cells and activities of prolidase and paraoxonase in brain when compared with the control group (p<0.05). A significant decrease in brain total antioxidant capacity and nitric oxide levels were found in I/R group when compared with the control group (p<0.05). Both nebivolol and zofenopril treatment prevented decreasing of the total antioxidant capacity and nitric oxide levels, produced by I/R in the brain (p<0.05). Both nebivolol and zofenopril treatment prevented the total oxidant status, malondialdehyde levels, activities of paraoxonase and prolidase from increasing in brains of rats exposed to I/R (p<0.05). In conclusion, both nebivolol and zofenopril protected rats from ischemia-induced brain injury. The protection may be due to the indirect prevention of oxidative stress and apoptosis. (C) 2011 Elsevier Inc. All rights reserved.
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    Antioxidant Signal and Kidney Injury Molecule-1 Levels in Shockwave Lithotripsy Induced Kidney Injury
    (Mary Ann Liebert, Inc, 2014) Hatipoglu, Namik Kemal; Evliyaoglu, Osman; Isik, Birgul; Bodakci, Mehmet Nuri; Bozkurt, Yasar; Sancaktutar, Ahmet Ali; Soylemez, Haluk
    Purpose: Shockwave lithotripsy (SWL) induces acute kidney injury (AKI) that extends from the papilla to the outer cortex by causing ischemia and the production of nephrotoxic agents. Direct ischemic damage and the generation of free radicals cause injury to the proximal tubular cells. Kidney injury molecule-1 (KIM-1) is a transmembrane glycoprotein that is upregulated in proximal tubular cells after ischemic or nephrotoxic injury and is not expressed in healthy kidneys. We evaluated the extent of free radical production in response to SWL by measuring urinary total antioxidant capacity (TAC) and total oxidant status (TOS). Furthermore, we investigated the severity of SWL-induced kidney injury by measuring KIM-1 expression levels. Patients and Methods: The study population comprised 30 patients who were carefully selected and 30 age and sex matched control subjects. All patients received the same SWL procedure. Midstream urine samples were collected from patients before SWL and at 120 minutes after SWL. Urine KIM-1 levels were measured by enzyme-linked immunosorbent assay, and TAC and TOS were measured via spectrophotometry. Results: Mean levels of TAC (2.880.56mmolTxEq/L),TOS (8.27 +/- 1.57molH(2)O(2)Eq/L), and KIM-1 (0.55 +/- 0.08ng/mL) before SWL were not significantly different from mean TAC, TOS, and KIM-1 levels measured from the control group at 2.81 +/- 0.42mmolTxEq/L, 10.73 +/- 1.4molH(2)O(2)Eq/L, and 0.51 +/- 0.07ng/mL, respectively. Two hours after SWL, mean urine TAC levels (2.81 +/- 0.85mmolTxEq/L, P=0.02) were decreased and mean KIM-1 expression (0.85 +/- 0.11ng/mL, P=0.01) was significantly increased, but there was no significant difference in mean TOS levels (11.24 +/- 1.9molH(2)O(2)Eq/L, P=0.627) compared with the control group. Conclusions: The increased burden of free radical oxidants in the setting of decreasing antioxidant capacity may be one of the initial indicators of AKI after SWL. Moreover, KIM-1 demonstrates great potential as an early and noninvasive biomarker of SWL-induced kidney injury.
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    ANTIOXIDANT SIGNAL AND KIM-1 LEVELS IN ESWL INDUCED KIDNEY INJURY
    (Mary Ann Liebert, Inc, 2012) Hatipoglu, Namik Kemal; Evliyaoglu, Osman; Bodakci, Mehmet Nuri; Atar, Murat; Penbegül, Necmettin; Soylemez, Haluk; Sancaktutar, Ahmet Ali
    [Abstract Not Available]
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    Bacterial translocation and inflammatory alterations in an experimental intestinal obstruction model in splenectomized rats
    (Aves, 2012) Sirca, Tarik; Onder, Akin; Kapan, Murat; Tekin, Recep; Firat, Ugur; Evliyaoglu, Osman; Taskesen, Fatih
    Purpose: Intestinal obstruction leads to an increase in the secretion of pro-inflammatory and inflammatory cytokines, oxidative injury, mucosal barrier dysfunction and bacterial translocation with the deterioration of normal ecological balance. Mitogenic activity resulting from splenectomy is reported to influence the development of bacterial translocation as a result of an increase in the proliferation of T cells and a decrease in the levels of serum tufsin. In this study, we aimed to investigate the effect of splenectomy on bacterial translocation and inflammatory response alterations resulting from the intestinal obstruction in rats. Materials and Methods: Twenty-four rats were divided into 3 groups as follows: Group 1 (Sham), only the ileocecal junction dissection; Group 2 (intestinal obstruction), complete ileal ligation; Group 3 (Splenectomy + intestinal obstruction), splenectomy following complete ileal ligation. 24 hours after the initial laparotomy, rats were sacrificed with the reception of intra-cardiac blood. Peritoneal swap, mesenteric lymph node, liver and ileal specimens, taken in sterile conditions, were examined microbiologically, biochemically and histopathologically. Results: Intestinal obstruction resulted in a significant increase in bacterial translocation, oxidative stress, inflammation, and ileal mucosal injury (p<0.05). No significant difference occurred between the splenectomized and non-splenectomized rats. Similar asimetric dimethylarginine levels were observed in all groups (p>0.05). Conclusions: It was proven that splenectomy has no significant effect on the bacterial translocation and inflammation in experimental intestinal obstruction models in rats.
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    A Clinical, Radiographic and Laboratory Evaluation of Prognostic Factors in 363 Patients with Malignant Pleural Mesothelioma
    (Karger, 2010) Tanrikulu, Abdullah Cetin; Abakay, Abdurrahman; Kaplan, Mehmet Ali; Kucukoner, Mehmet; Palanci, Yilmaz; Evliyaoglu, Osman; Sezgi, Cengizhan
    Background: Malignant pleural mesothelioma (MPM) has a poor prognosis. Objectives: Only few studies in literature investigated the presence of pleural fluid and radiographic findings for the prognosis of MPM. Methods: We retrospectively investigated the hospital charts of 363 MPM patients who were diagnosed from January 1989 to March 2010. Survival time was calculated by the Kaplan-Meier method. Pretreatment clinical, laboratory and radiographic features of each patient at the time of diagnosis were obtained from patients' charts. Results: The mean age of 363 patients (217 men, 146 women) was 50.6 +/- 11.2 years (range 19-85) and the mean survival time was 11.7 +/- 8.6 months (range 1-53). Histological types of MPM were epithelial (71.2%), mixed (15.9%) and sarcomatous type (4.9%). The frequency of disease stages were 31.4% for stage 1, 24.2% for stage 2, 28.6% for stage 3 and 15.8% for stage 4. The most frequent symptoms were dyspnea (82.1%), chest pain (68.3%) and weight loss (58.9%). Results of univariate and multivariate analyses revealed that a Karnofsky performance score <= 60, a pleural fluid glucose level <= 40 mg/dl, a C-reactive protein level > 50 mg/l, a serum lactate dehydrogenase level > 500 U/l, the presence of pleural fluid, pleural thickening > 1 cm and a platelet count of > 420 x 10(3)/mu l were found to be associated with poor prognosis in MPM. Conclusions: Our data suggest that low pleural fluid glucose and high C-reactive protein, the presence of pleural fluid and pleural thickening were associated with poor MPM prognosis. Further prospective studies are needed to highlight prognostic factors more clearly. Copyright (C) 2010 S. Karger AG, Basel
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    Coenzyme Q10, Copper, Zinc, and Lipid Peroxidation Levels in Serum of Patients with Chronic Obstructive Pulmonary Disease
    (Humana Press Inc, 2011) Tanrikulu, Abdullah Cetin; Abakay, Abdurrahman; Evliyaoglu, Osman; Palanci, Yilmaz
    Severity of chronic obstructive pulmonary disease (COPD) exacerbation is associated with increased level of copper (Cu), zinc (Zn), and lipid peroxidation (malodialdehyde, MDA). The aim of this study was to investigate the levels of lipid peroxidation, Coenzyme Q10 (CoQ10), Zn, and Cu in the COPD exacerbations. Forty-five patients with COPD acute exacerbation and 45 healthy smokers as control group were used in the study. Forced expiratory volume in 1 s (FEV1) and forced vital capacity (FVC) were lower in exacerbation group than in control. C- reactive protein levels, white blood cell count, and sedimentation rate were significantly (p < 0.001) higher in patients than in control. CoQ10 level and Cu/Zn ratio was significantly (p < 0.05) lower in patients than in control, although MDA, Cu, and Zn levels were significantly (p < 0.05) higher in patients than in control. Negative correlations were found among MDA, Cu, Zn, FEV1, and FVC values in exacerbation and control subjects (p < 0.05). In conclusion, we observed that oxidative stress in the exacerbation period of COPD patients was increased. The decrease in CoQ10 level and Cu/Zn ratio and elevation in Cu and Zn levels observed in the patients probably result from the defense response of organism and are mediated by inflammatory-like substances.
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    Effect of Caffeic Acid Phenethyl Ester on Intra-Abdominal Adhesion in Rats
    (Karger, 2013) Turgut, Abdulkadir; Sak, Muhammet Erdal; Turkcu, Gul; Ozler, Ali; Soydinc, Hatice Ender; Evsen, Mehmet Siddik; Evliyaoglu, Osman
    Background: To determine the impact of caffeic acid phenethyl ester (CAPE) on abdominal adhesion formation after laparotomy. Methods: Forty female rats were allocated into four distinct groups on which laparotomy alone; laparotonny with traumatization of the uterine horns; laparotomy, traumatization of the uterine horns and intraperitoneal irrigation with saline, and laparotomy, traumatization of the uterine horns and intraperitoneal irrigation with CAPE were performed. After sacrifying the animals on the 14th postoperative day, histopathological examination and biochemical analysis were conducted to evaluate the formation of abdominal adhesions and antioxidant status. Results: In the CAPE group, total adhesion scores were significantly lower than in the control and saline groups. The CAPE group displayed less inflammation, giant cell formation, fibrosis and fibroblastic activity than the control group. On the other hand, the control group displayed higher total adhesion scores. Conclusion:The results of this study indicate that the administration of CAPE may have beneficial effects for the prevention of abdominal adhesion formation after laparotomy. Further clinical studies are mandatory to explore the actual therapeutic potential of CAPE. Copyright (C) 2013 S. Karger AG, Basel
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    Effects of Ellagic Acid on Copper, Zinc, and Biochemical Values in Serum and Liver of Experimental Cholestatic Rats
    (Humana Press Inc, 2011) Gumus, Metehan; Yuksel, Hatice; Evliyaoglu, Osman; Kapan, Murat; Boyuk, Abdullah; Onder, Akin; Aldemir, Mustafa
    Ellagic acid (EA) is a natural polyphenolic compound. Although, modulator effects of EA on copper (Cu) and zinc (Zn) levels in some liver diseases have been reported in experimental animals, its effects in obstructive jaundice (OJ) has not been clarified. We aimed to evaluate potential effects of EA on Cu and Zn levels in liver and serum of cholestatic rats. Forty Wistar albino rats were equally divided into four groups. First group was used as controls. Second group received EA (60 mg(-1) kg(-1) day(-1)) for 8 days. Third was OJ group, and fourth group was OJ plus EA group. After 8 days, blood and liver samples were obtained. Higher serum and liver Cu and lower serum and liver Zn levels were found in OJ group (p < 0.05) compared with other groups. However, these differences reached to significant levels for Cu in serum and for Zn in lever. Higher serum copper levels were decreased, and lower liver Zn levels were increased by EA treatment in cholestatic rats (p < 0.05). Also, higher Cu/Zn ratio in OJ group was decreased by EA treatment both in liver (p < 0.05) and in serum (p < 0.05). Significantly higher serum bilirubin, alkaline phosphatase, alanine aminotransferase, and aspartate aminotransferase values were found in OJ and OJ + EA groups compared with the control and EA groups (p < 0.05). In conclusion, result of the current study indicated that ellagic acid has modulator effects on Cu and Zn levels in liver and serum of cholestatic rats.
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    The effects of erythropoietin on bacterial translocation and inflammation in rats with obstructive jaundice
    (Edizioni Luigi Pozzi, 2014) Onder, Alin; Kapan, Murat; Yuksel, Hatice; Tekin, Recep; Kele, Ayserur; Evliyaoglu, Osman; Arikanoglu, Zulfu
    INTRODUCTION: Obstruction of the common bile duct is associated with hepatic paranchymal damage and increased susceptibility to subsequent bacterial infections. Erythropoietin has antiinflammatory and cytoprotective effects and it induces antiinflammatory cytokines and suppresses the production of proinflammatory cytokines. In this study, we aimed to investigate the effect of Erythropoietin on bacterial translocation, inflammation and tissue damage in rats with obstructive jaundice. MATERIALS AND METHODS: Thirty-two Wistar albino rats (200-250 g) were divided into 4 groups as follows: Group 1 (Sham); only hepatoduodenal ligament dissection, Group 2 (Erythropoietin); hepatoduodenal ligament dissection and given 500 IU/kg Erythropoietin subcutaneously, Group 3 (Obstructive jaundice); complete hepatoduodenal ligament ligation, Group 4 (Obstructive jaundice + Erythropoietin); complete hepatoduodenal ligament ligation and given 500 IU/kg Erythropoietin subcutaneously. After 7 days, the rats were sacrificed by taking blood from the heart for biochemical analyses. Peritoneal swab culture, liver, mesenteric lymph nodes, spleen and ileum were collected for microbiological and histopathological examinations. RESULTS: Erythropoietin reduced the secretion of inflammatory cytokines, oxidative damage and bacterial translocation, prevent the formation of inflammatory changes in intestine and liver after obstructive jaundice. Conclusion: The treatment of EPO in rats with Of reduces bacterial translocation, inflammation and tissue damage.
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    THE EFFECTS OF ERYTHROPOIETIN ON BACTERIAL TRANSLOCATION AND INFLAMMATORY RESPONSE IN AN EXPERIMENTAL INTESTINAL OBSTRUCTION MODEL IN RATS
    (Soc Medical Biochemists Serbia, 2013) Kapan, Murat; Onder, Akin; Yuksel, Hatice; Evliyaoglu, Osman; Firat, Ugur; Tekin, Recep; Gul, Mesut
    Background: Intestinal obstruction results in distortion of balance of antiinflammatory cytokines and release of oxidants, and also leads to bacterial translocation, sepsis and multiple organ failure. Asymmetric dimethylarginine is related to multiple organ failure as a new prognostic marker. Erythropoietin reduces the inflammatory response by decreasing the levels of proinflammatory cytokines and cytokine-induced apoptosis. In this study, we aimed to investigate the effectiveness of erythropoietin in reducing the severity of bacterial translocation and inflammatory response after intestinal obstruction and the relation between asymmetric dimethylarginine and inflammatory markers. Methods: Forty Wistar albino rats (200-250 g) were divided into 4 groups as follows: Group 1 (Sham), only ileocaecal junction dissection; Group 2 (Erythropoietin), ileocaecal junction dissection and 3000 IU/kg erythropoietin subcutaneously; Group 3 (Intestinal Obstruction), complete ileal ligation; Group 4 (Intestinal Obstruction + Erythropoietin), complete ileal ligation and 3000 IU/kg erythropoietin subcutaneously. After 24 hours, the rats were sacrificed by taking blood from the heart for biochemical analyses. Peritoneal swab culture, liver, mesenteric lymph nodes, spleen and ileum were collected for microbiological and histopathological examinations. Results: Erythropoietin reduced the secretion of inflammatory cytokines, oxidative damage and bacterial translocation, prevented the formation of inflammatory changes in the intestine, liver, spleen and mesenteric lymph nodes, and also significantly prevented the formation of intestinal damage after intestinal obstruction (p<0.05). Conclusions: Asymmetric dimethylarginine levels did not differ between the groups. Erythropoietin may be useful to preserve from intestinal injury and related sepsis in patients with intestinal obstruction. Asymmetric dimethylarginine is not a suitable prognostic marker.
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    Effects of Intrathecal Caffeic Acid Phenethyl Ester and Methylprednisolone on Oxidant/Antioxidant Status in Traumatic Spinal Cord Injuries
    (Thieme Medical Publ Inc, 2015) Gocmez, Cuneyt; Celik, Feyzi; Kamasak, Kagan; Kaplan, Metin; Uzar, Ertugrul; Arikanoglu, Adalet; Evliyaoglu, Osman
    PurposeTo examine the effect of intrathecally given caffeic acid phenethyl ester (CAPE) on peroxidation and total oxidant and antioxidant systems, and the effect of intrathecally given methylprednisolone (MP) in spinal cord injury (SCI) models. Materials and MethodsFour groups of 10 rats were formed: (1) Laminectomy, intrathecal saline injection, no SCI (sham: S); (2) Laminectomy, intrathecal saline injection, SCI (control: SCI); (3) Laminectomy, intrathecally given single dose of 3 mg/kg MP, SCISCI (SCI+MP). 4) Laminectomy, intrathecally given single dose of 1 mu g/kg CAPE, SCI (SCI+CAPE). Malondialdehyde (MDA), total oxidant activity (TOA), total antioxidant capacity (TAC), superoxide dismutase (SOD), and glutathione peroxidase (GPx) values in the spinal cord tissue were evaluated. ResultsWhen group S and group SCI were compared, MDA, TOA, and SOD parameters increased post-SCI (p<0.01). When compared with group SCI, it was observed that CAPE and MP decreased the MDA, TOA, and SOD levels (p<0.01). This decrease was more pronounced in the SCI+CAPE group. When group S and group SCI were compared, a statistically substantial decrease was observed in the post-SCI TAC levels. When compared with group SCI, it was shown that CAPE and MP treatment substantially increased TAC levels (p<0.001). ConclusionIntrathecal injection of both CAPE and MP inhibits lipid peroxidation and increase of oxidants in SCIs.
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    Effects of Malathion in Fetal Kidney Tissues in Pregnant Rats: Teratogenic Effects Induced by Different Doses
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2012) Alp, Harun; Sak, Muhammet Erdal; Evsen, Mehmet Siddik; Firat, Ugur; Evliyaoglu, Osman; Penbegül, Necmettin; Sancaktutar, Ahmet Ali
    The aim of this study was to investigate the teratogenic effects of Malathion (ML) induced by different doses on fetal kidney tissues in pregnant rats. A total of 28 Sprague-Dawley pregnant rats were randomly divided into 4 groups of 7 rats each. Depending on ML dose, four groups were formed, including (I) control, (II) ML 2.5 (ML 2.5 mg/kg/day, orally), (III) ML 5 (5 mg/kg/day, orally), and (IV) ML 10 (10 mg/kg/day, orally). ML application started when the male and female were put together (when mating started). Daily ML application was continued until birth. It was determined that in parallel with dose of ML, ML resulted in toxic effects on serum enzymes (acetyl-cholinesterase (AChE), amylase and lipase) and kidney tissues of pregnant rats, and also -regardless of ML dose in fetal kidneys-it led to teratogenic effects in all the doses. Biochemical data wasconfirmed by histopathologic data. We concluded that ML leads to kidney damage in both pregnant and fetal rats as a result of its teratogenic and toxic effects.
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    Effects of Storage Temperature and Time on Stability of Serum Tacrolimus and Cyclosporine A Levels in Whole Blood by LC-MS/MS
    (Hindawi Ltd, 2015) Kaplan, Ibrahim; Yuksel, Hatice; Evliyaoglu, Osman; Basarali, M. Kemal; Toprak, Gulten; Colpan, Leyla; Sen, Velat
    Tacrolimus and cyclosporine A are immunosuppressant drugs with narrow therapeutic windows. The aim of this study was to investigate the stability of tacrolimus and cyclosporin A levels in whole blood samples under different storage conditions. Whole blood samples were obtained from 15 patients receiving tacrolimus and 15 patients receiving cyclosporine A. Samples were immediately analyzed and then stored at different conditions (room temperature (24 degrees C-26 degrees C) for 24 hours, + 4 degrees C for 24 and 48 hours, and -20 degrees C for one month) and then analyzed again. For tacrolimus, there was a significant difference between samples analyzed immediately and those kept 24 hours at room temperature (P = 0.005) (percent change 32.89%). However, there were no significant differences between the other groups. For cyclosporine A, there was a significant difference between samples analyzed immediately and those kept 24 hours (P = 0.003) (percent change 19.47%) and 48 hours (P = 0.002) (percent change 15.38%) at + 4 degrees C and those kept 24 hours at room temperature (P = 0.011) (percent change 9.71%). Samples of tacrolimus should be analyzed immediately or stored at either + 4 degrees C or -20 degrees C, while samples of cyclosporine A should be analyzed immediately or stored at -20 degrees C.
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    Ellagic acid attenuates oxidative stress on brain and sciatic nerve and improves histopathology of brain in streptozotocin-induced diabetic rats
    (Springer-Verlag Italia Srl, 2012) Uzar, Ertugrul; Alp, Harun; Cevik, Mehmet Ugur; Firat, Ugur; Evliyaoglu, Osman; Tufek, Adnan; Altun, Yasar
    The aim of this study was to investigate the possible effects of ellagic acid in brain and sciatic nerve tissues of diabetic rats. Also, the impact of ellagic acid on catalase and paraoxonase (PON-1) activities, total antioxidant status (TAS), total oxidant status (TOS), oxidative stress index (OSI), malondialdehyde (MDA) and nitric oxide (NO) were examined. The rats were randomly divided into four groups, with eight rats each: Normal controls (not diabetic), only ellagic acid treated (ellagic acid controls, not diabetic), Diabetic controls (streptozotocin, diabetic), ellagic acid-treated diabetic (streptozotocin + ellagic acid). After a 4 week experiment, rats were sacrificed, and biomarkers for oxidative stress in the brain and sciatic nerve tissues of the rats were measured. There was significant depletion in the PON-1, catalase, and TAS levels in the brain and sciatic nerve tissues compared to the control groups (for both parameters, p < 0.05). The values of catalase, PON-1 and TAS reversed back to normal levels in ellagic acid-treated diabetic rats compared to untreated diabetic rats (for both parameters, p < 0.05). The levels of MDA, TOS, NO and, OSI in the brain and sciatic nerve tissues were higher in untreated diabetic rats compared to control group (for both parameters p < 0.05). However, MDA, TOS, OSI, and NO levels were found to be significantly reduced in the ellagic acid-treated diabetic group compared to the untreated diabetic group in these tissues (for both parameters, p < 0.05). In conclusion, the results of the present study suggested that ellagic acid exhibits neuroprotective effects against oxidative damage in diabetic rats.
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    Evaluation of serum oxidant/antioxidant balance in multiple sclerosis
    (Springer Heidelberg, 2012) Acar, Abdullah; Cevik, M. Ugur; Evliyaoglu, Osman; Uzar, Ertugrul; Tamam, Yusuf; Arikanoglu, Adalet; Yucel, Yavuz
    The total oxidative status (TOS)/total anti-oxidative status (TAS) ratio can provide information on an individual's absolute oxidative stress index (OSI). We investigated the alterations in the oxidant-antioxidant balance by measuring the oxidant parameters OSI, TOS, and malondialdehyde (MDA) together with the antioxidant parameters such as TAS, and superoxide dismutase (SOD) in patients with relapsing remitting multiple sclerosis (MS). To our knowledge, this is the first study to evaluate OSI in patients with relapsing remitting MS. 35 ambulatory patients with relapsing-remitting MS (35.8 +/- A 8.7 years) and 32 age- and activity-matched healthy control subjects (35.1 +/- A 3.7 years) that participated in the study. Serum TAS and TOS levels were determined using new automated methods. MS patients had higher concentrations of MDA (151.5 +/- A 51.1 vs. 111.3 +/- A 27.4 nmol/g protein, respectively; p < 0.001), TOS (148.1 +/- A 162.5 vs. 48.3 +/- A 46.4 mmol H2O2 Equiv./g protein, respectively; p = 0.002), OSI (21124 +/- A 32543 vs. 5294 +/- A 5562, respectively; p = 0.008), and SOD (4.5 +/- A 0.7 vs. 3.4 +/- A 0.6 U/L, respectively; p < 0.001) compared with healthy controls. On the other hand, MS patients had lower concentrations of NO (12.3 +/- A 6.9 vs. 17.4 +/- A 2.5 mu mol/g protein, respectively; p < 0.001) and TAS (0.82 +/- A 0.27 vs. 0.26 +/- A 0.15, respectively; p = 0.011) compared with healthy controls. In conclusion, these findings indicate that the oxidative stress plays an important role in the pathogenesis of MS.
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    Impact of insulin resistance on contrast induced nephropathy in patients undergoing percutaneous coronary intervention
    (Springer India, 2014) Elbey, Mehmet Ali; Evliyaoglu, Osman; Simsek, Ziya; Oylumlu, Mustafa; Akil, Mehmet Ata; Aydin, Mesut; Bilik, Zihni
    Contrast-induced nephropathy (CIN) is a common complication following percutaneous coronary intervention (PCI). Contrast-induced nephropathy after emergency PCI in subjects with insulin resistance (IR) has not been studied before. In this prospective study we determined the relation between IR on CIN, among those undergoing PCI due to acute coronary syndrome. One hundred twenty four consecutive acute coronary syndrome patients with diabetes (N = 44), insulin resistance (N = 38) and normal glycemic metabolism (N = 42) were included in the study. They were all treated with PCI. Pre- and post procedural creatinines were measured and independent predictors of CIN were analyzed. IR was defined as a HOMA level (HOMA-IR = Serum Glucose (mg/dL) X Plasma Insulin (micro unit/mL) / 405 > 2.5. Patients with IR or diabetes had significantly higher levels of creatinine after procedure, serum cholesterol, glucose, contrast volume, hospital stay and HOMA. Female gender, frequency of CIN and multivessel disease were also higher in these patients. On the other hand they had significantly lower ejection fraction. Logistic regression analysis showed that HOMA was the single independent risk factor for CIN in patients with acute coronary syndrome treated with PCI. Insulin resistance is an independent risk factor for CIN in patients with acute coronary syndrome treated with PCI. It carries a similar risk with diabetes and proper prophylaxis should be performed.
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    Increased asymmetric dimethylarginine and nitric oxide levels in patients with migraine
    (Bmc, 2011) Uzar, Ertugrul; Evliyaoglu, Osman; Toprak, Guelten; Acar, Abdullah; Yucel, Yavuz; Calisir, Tugba; Cevik, Mehmet Ugur
    Asymmetric dimethylarginine (ADMA) has been found as correlated with endothelial dysfunction and oxidative stress. There are few studies regarding ADMA and nitric oxide (NO) levels in patients with migraine and alterations of ADMA and NO levels during migraine attack are not well-known. Therefore, in present study, we aimed to measure NO and ADMA levels in patients with migraine and compare them with the control group to investigate the correlation between migraine, oxidative stress and endothelial dysfunction. The migraine group consisted of 59 patients, including 22 suffering from migraine with aura and 37 suffering from migraine without aura. The control group consisted of 31 healthy volunteers without headache. The patients in migraine group were divided into subgroups based on whether attack period was present or not and whether it was migraine with or without aura. Plasma ADMA levels were measured using an enzyme-linked immunosorbent assay method. Migraine patients had higher concentrations of NO (35.6 +/- A 7.7, 31.0 +/- A 6.2 mu mol/L, respectively, p = 0.005) and ADMA (0.409 +/- A 0.028, 0.381 +/- A 0.044 mu mol/L, respectively, p = 0.001) levels when compared with the healthy controls. During migraine attack, NO and ADMA levels were found to be significantly higher in migraine group as compared to control group (respectively, p = 0.015, p = 0.014). Similarly, NO and ADMA levels in the patients with migraine in the interictal period were found to be significantly higher as compared to control group (p = 0.011, p = 0.003). In conclusion, higher ADMA and NO levels of patients with migraine supported that oxidative stress and endothelial dysfunction may have a role in migraine pathogenesis.
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    Increased bone mineral density in patients with non-alcoholic steatohepatitis
    (Baishideng Publishing Group Inc, 2013) Kaya, Muhsin; Isik, Devran; Bestas, Remzi; Evliyaoglu, Osman; Akpolat, Veysi; Buyukbayram, Huseyin; Kaplan, Mehmet Ali
    AIM: To determine the relationship between non-alcoholic steatohepatitis (NASH) and bone mineral density (BMD). METHODS: A total of 38 patients (25 males) with a diagnosis of histologically proven NASH and 42 healthy controls (24 males) were enrolled in the study. Demographic features, clinical findings, complete blood count and routine biochemical analysis, as well as adrenal, thyroid and gonadal functions, were recorded. Additionally, intact parathormone, 25-OH-vitamin-D3, tumor necrosis factor-alpha, interleukin-6, interleukin-1, in-sulin-like growth factor-1 and insulin-like growth factor binding protein-3 levels were measured in both groups. Furthermore, lumbar spine and femoral neck BMD of both groups were measured by the dual-energy X-ray absorptiometry (DXA) method. RESULTS: The mean age was 41 +/- 12 years in the NASH group and 43 +/- 11 years in the control group. Among demographic features, waist circumference was significantly larger in the NASH group compared to the control group (P < 0.019). Among laboratory parameters, serum triglyceride (P < 0.008), alanine transaminase (P < 0.0001), aspartate transaminase (P < 0.001), alkaline phosphatase (P < 0.016), gamma glutamyl transferase (P < 0.0001), ferritin (P < 0.001) and 25-OH-vitamin-D3 levels (P < 0.0001) were significantly higher in the NASH group compared to the control group. Lumbar BMD was significantly higher in the NASH group compared to the control group (1.057 +/- 0.119 g/cm(2) vs 0.941 +/- 0.133 g/cm(2); P < 0.001, respectively). In the NASH group, there was no significant relationship between BMD and fibrosis stage in liver biopsy. CONCLUSION: NASH increases BMD and may be related to an elevated serum 25-OH-vitamin D3 level. (C) 2013 Baishideng Publishing Group Co., Limited. All rights reserved.
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    Investigation of Some Sera Biomarker Levels in Fascioliasis Patient
    (Kafkas Univ, Veteriner Fakultesi Dergisi, 2012) Cicek, Mutalip; Evliyaoglu, Osman; Boyuk, Abdullah; Tekin, Alicem
    Fasciola sp. that are generally known as liver trematode of sheep and cattle cause infections also in the human. In this study, we investigated in the sera of patients with fascioliasis how paraoxonase, total oxidant level, total antioxidant capacity, apolipoprotein A-I, apolipoprotein B, transferrin and nitric oxide levels are affected. For this purpose, 45 patients with fascioliasis and 38 healthy controls were enrolled in the study. Fascioliasis was diagnosed with ELISA IgG, stool examination and radiologic imaging. Number of females and males were determined as 34/11 and 30/8 in patient and control groups. Mean age was 38.1 +/- 11.7and 35.8 +/- 16.9 years in patient and control groups, respectively. A statistically significant difference was not detected between groups in terms of age, gender and body mass index (P>0.05). As the result of the study, paraoxonase (P<0.001), Apolipoprotein A-I (P<0.001), transferrin (P<0.001) and total antioxidant capacity (P<0.024) levels were found lower in patient group compared to control group and the difference was statistically significant (P<0.001). A difference was not detected between two groups in terms of apolipoprotein B levels. Lower paraoxonase, total antioxidant capacity, transferrin and Apolipoprotein A-I levels in patients with fascioliasis compared to controls and higher nitric oxide and total oxidant status may be guide for understanding pathogenesis and immunity of fascioliasis and for novel biomarkers that could aid for diagnosis.