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    Effect of oxidative stress on antioxidant enzyme activities, homocysteine and lipoproteins in chronic kidney disease
    (Springer Heidelberg, 2008) Atamer, Aytac; Kocyigit, Yuksel; Ecder, Sabahat Alisir; Selek, Sahabettin; Ilhan, Nevin; Ecder, Tevfik; Atamer, Yildiz
    Background: Our aim was to determine the association of paraoxonase (PON1), superoxide dismutase (SOD) and catalase (CAT) activities and malondialdehyde (MDA) concentration, with lipoprotein and homocysteine (Hcy) concentrations in chronic kidney disease (CKD). Methods: We examined 60 patients with CKD (35 men and 25 women), aged 52.7 +/- 3.1 years, and 60 age-, sex- and body mass index (BMI)-matched control subjects. Serum PON1 activity, levels of lipoproteins, Hcy and MDA were evaluated; SOD and CAT activities in erythrocytes were also investigated. Results: Levels of MDA, lipoprotein (a) (Lp(a)) and Hcy were significantly higher, while PON1 activity was lower in CKD than in controls (p<0.001). There were no significant differences between the patients and controls in the SOD and CAT activities (p>0.05). Levels of high-density lipoprotein cholesterol (HDL-C) and apolipoprotein A-I (ApoA-I) were lower in CKD than in controls (p<0.001), whereas total cholesterol (T-Chol) and triglyceride (TG) levels showed no significant difference between the groups. Levels of apolipoprotein B (ApoB) and low-density lipoprotein cholesterol (LDL-C) were higher in CKD than in controls (p<0.001). In CKD, PON1 activities were correlated with levels of Hcy, MDA, HDL-C, Lp(a) and ApoA-I. A significant positive correlation was found between levels of Hcy and Lp(a). Conclusions: The results of this work suggest that patients with CKD exhibit an oxidant-antioxidant imbalance which is closely related to high levels of atherosclerotic risk factors.
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    Plasma Cytokine Levels in Migraineurs During and Outside of Attacks
    (Modestum Ltd, 2015) Aydin, Meliha; Demir, Caner Feyzi; Arikanoglu, Adalet; Bulut, Serpil; Ilhan, Nevin
    The hypothesis of cytokines as possible pain mediators in neurovascular inflammation offers a potential mechanism for the generation of migraine pain, but few studies examined cytokine levels in migraine patients. The aim of this study was to determine the levels of TNF-a, IL-4, IL-5, IL-6, IL-10, and IFN-gamma in serum of patients with migraine during attacks and attack-free periods. We evaluated 70 patients with migraine. Patients ranged in age from 17 to 55 19 healthy people without any diagnosis of migraine or headache were used as a control group. Levels of TNF-a, IL-4, IL-5, IL-6, IL-10, and IFN-gamma in plasma samples were determined by enzyme-linked immunosorbent assay (ELISA) techniques. The patients were classified as migraine with aura during attack, migraine with aura outside attack, migraine without aura during attack, migraine without aura outside attack according to migraine form presentation. TNF-a levels in migraine patients were significantly higher than in healthy controls. There was a significant change in serum TNF-a levels in patients with migraine with aura during migraine attacks. The levels of IL-6 high in all migraine subgroups compared to controls. In ictal groups, IL-10 levels were found higher than in interictal groups and healthy controls (p<0.05). Changes of the level of TNF-a, IL-6 and IL-10 in the blood of patients with migraine may suggest that neurogenic inflammation participates in the pathogenesis of migraine.