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    Assessment of fetal antioxidant and oxidant status during different anesthesia techniques for elective cesarean sections
    (Medknow Publications & Media Pvt Ltd, 2015) Karabayirli, Safinaz; Keskin, Esra Aktepe; Kaya, Ahmet; Koca, Cemile; Erel, Ozcan; Demircioglu, Ruveyda Irem; Muslu, Bunyamin
    Background: We aimed to investigate the effects of general, spinal and epidural anesthesia on fetal total antioxidant status (TAS) and total oxidant status (TOS), and oxidative stress index (OSI) during elective cesarean section in this study. Materials and Methods: Forty-seven parturients scheduled for elective cesarean section were randomly allocated into three groups: Group spinal (n = 15), group epidural (n = 17), and group general (n = 15), This prospective randomized study was performed in Faculty of Medicine, Turgut Ozal University, Turkey. After the baby was delivered; TAS, TOS levels, and arterial blood gases parameters were analyzed in an umbilical arterial blood sample. OSI values are calculated by a ratio of TOS to the TAS. Results: The levels of TAS and TOS in umbilical arterial blood sample were not statistically different among three. However, OSI values were significantly different among the three groups (P = 0.042). Median OSI values is 24 (interquartile range [IQR], 2-37) in group spinal, 19 (IQR, 4-44) in group epidural, and 8 (IQR, 4-36) in group general. There was no significant difference in OSI values in the comparison of group spinal with group general and group epidural, but it was significantly lower in group general when compared with group epidural with Bonferroni correction (P = 0.017). Umbilical cord arterial blood gas values (pH, PaCO2 , PaO2 , SaO(2) , HCO3 , and CtO(2) ), glucose, lactate, and hemoglobin levels were similar in three groups. Conclusion: General anesthesia may be more favorable than epidural in those undergoing cesarean section when fetal oxidative status gains importance.
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    Endothelin-1 and Nitric Oxide levels in exudative age-related macular degeneration
    (Wolters Kluwer Medknow Publications journal@jovr.org, 2015) Totan, Yüksel; Koca, Cemile; Erdurmuş, Mesut; Keskin, Uğurcan; Yiğitoğlu, Ramazan
    Purpose: To evaluate plasma levels of endothelin-1 (ET-1) and nitric oxide (NO) in patients with exudative age-related macular degeneration (AMD). Methods: In this study, ET-1 levels, as well as nitrite plus nitrate concentrations as an indicator of plasma NO level, were measured in the plasma of 20 subjects with exudative AMD and compared with 20 healthy age and sex matched controls. Results: Mean plasma ET-1 level was significantly higher in exudative AMD patients as compared to control subjects (0.35 ± 0.06 fmol/ml versus 0.17 ± 0.03 fmol/ml, P = 0.015). Patients with exudative AMD also showed significantly lower mean plasma levels of nitrite plus nitrate as compared to the controls (58.9 ± 2.7 ?mol/l versus 82.6 ± 5.9 ?mol/l, P = 0.001). Conclusion: Increased concentrations of ET-1 and reduced levels of NO in the plasma may suggest an imbalance between vasoconstrictor and vasodilator agents, respectively, as a reflection of endothelial dysfunction in the pathogenesis of AMD. These findings may also imply the role of vasoconstriction in exudative AMD. © 2020 Elsevier B.V., All rights reserved.
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    Interaction of Metabolic Syndrome with Asthma in Postmenopausal Women: Role of Adipokines
    (Springer/Plenum Publishers, 2013) Aydin, Murat; Koca, Cemile; Ozol, Duygu; Uysal, Sema; Yildirim, Zeki; Kavakli, Havva Sahin; Yigitoglu, M. Ramazan
    The increasing prevalence of both asthma and obesity are major health problems. Recent studies established a possible link between obesity and asthma; however, the underlying mechanism is not clear. The aim of the study was to analyze the prevalence of metabolic syndrome in postmenopausal subjects with asthma and search the interactions between adipokines, metabolic syndrome, and asthma. A total of 45 female patients (57.5 +/- 13.9 years) with asthma and 30 healthy subjects (59.6 +/- 12.8 years) in postmenopausal status were enrolled in this study. For the diagnosis of metabolic syndrome, modified World Health Organization diagnostic criteria were used. Blood levels of glucose, lipid profile, HbA1c, insulin, CRP, leptin, adiponectin, tumor necrosis factor-alpha, interleukin (IL)-6, IL-8 and plasminogen activator inhibitor-1 (PAI-1) were measured. The mean body mass index was 29.6 +/- 5.4 for asthma patients and 28.2 +/- 5.3 for the control group. The incidence of metabolic syndrome was found as 26 % for both groups. Insulin resistance as calculated by homeostasis model assessment (HOMA-IR) and fasting insulin levels were significantly higher in asthma patients (p < 0.001 for both parameters). Leptin levels were significantly higher (p = 0.001) and adiponectin levels were lower (p = 0.029) in asthma patients compared to controls. We concluded that although incidence of obesity and metabolic syndrome was not higher in postmenopausal asthma patients than controls, there was an impairment of glucose metabolism and altered adipokine levels in asthma patients.
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    Is the level of maternal serum prohepcidin associated with preeclampsia?
    (Taylor & Francis Inc, 2015) Duvan, Candan Iltemir; Simavli, Serap; Keskin, Esra Aktepe; Onaran, Yuksel; Turhan, Nilgun Ozturk; Koca, Cemile
    Objective: The objective of the study was to compare pro-hepcidin, hemoglobin (Hb) concentration, hematocrit (Hct), C-reactive protein (CRP), IL-6 and iron status parameters in preeclamptic (PE) and healthy pregnant women, and to examine the relationship between serum pro-hepcidin levels and iron parameters of preeclampsia (PE). Methods: In a prospective controlled study, we collected serum from women with normal pregnancy (n = 37) and from women with PE (n = 30) at the Department of Obstetrics and Gynecology at Turgut Ozal University between February 2010 and January 2013. Pro-hepcidin, hemoglobin (Hb) concentration, hematocrit (Hct), CRP, IL-6 and iron status parameters were measured in all patients and compared between groups. Results: Levels of serum prohepcidin in PE and control groups were similar and amount 69.4 +/- 19.7 and 71.9 +/- 22.1 ng/ml, respectively. The difference was not statistically significant (p: 0.694). On the other hand, the study group had a statistically lower iron binding capacity (IBC), total iron binding capacity, transferin, total protein, albumin levels (p<0.05). No significant differences were found among prohepcidin, Hb concentration, Hct, iron, ferritin, IL-6, urea and creatine in both the groups. Conclusion: In pregnancies complicated by PE with normal values of hemoglobin and hematocrit, serum prohepcidin concentrations are similar to those observed in healthy pregnant women. The analysis revealed no significant correlations between prohepcidin level and serum iron, serum ferritin or transferrin in the PE.
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    Prohepcidin in maternal circulation: is it related to spontaneous preterm labor?
    (Tubitak Scientific & Technological Research Council Turkey, 2014) Onaran, Yuksel; Aktepe Keskin, Esra; Iltemir Duvan, Zehra Candan; Simavli, Serap Aynur; Koca, Cemile; Kafali, Hasan; Turhan, Nilgun
    Background/aim: To investigate whether spontaneous preterm labor (PTL) with intact membranes is associated with changes in maternal serum prohepcidin concentrations. Materials and methods: The study consisted of patients with spontaneous PTL with intact membranes (n = 25), a control group of healthy pregnant women between the 24th and 37th gestational weeks (n = 22), and uncomplicated term pregnancies in spontaneous labor (n = 19). Blood samples were collected from patients at the time of clinical diagnosis. Levels of prohepcidin, hemoglobin, serum ferritin, serum iron, unsaturated iron binding capacity, total iron binding capacity, transferrin and transferrin saturation, C reactive protein, and interleukin-6 were measured. Results: Patients with spontaneous PTL had significantly lower maternal serum prohepcidin concentrations than term delivery and control subjects. Conclusion: Maternal serum prohepcidin concentration is lower in patients with spontaneous PTL compared to term delivery and control subjects. This suggests that measuring maternal serum prohepcidin concentrations in PTL may be a feasible method for understanding etiologic causes of spontaneous preterm delivery, but, before suggesting this as a course of action, low levels of prohepcidin in patients with PTL need to be more fully investigated.