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    Effects of Malathion in fetal kidney tissues in pregnant rats: Teratogenic effects induced by different doses
    (Veteriner Fakultesi Dergisi, 2012) Alp H.; Sak M.E.; Evsen M.S.; Firat U.; Evliyaoglu O.; Penbegul N.; 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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    The predictive role of Paraoxonase 1 (PON1) activity on survival in patients with metastatic and nonmetastatic gastric cancer
    (Societa Editrice Universo, 2014) Atay A.E.; Kaplan M.A.; Evliyaoglu O.; Ekin N.; Isikdogan A.
    Background. Oxidative stress is known to be implicated in the pathogenesis of malignancies including gastric cancer (GC). Paraoxonase 1(PON1) is a member of antioxidant defense system which acts by hydrolysing peroxidases. Our aim is to assess the levels PON1 activity in different stages and localizations of GC and analyze the predictive role of PON1 activity on overall survival in GC. Materials and Methods. One hundred and twenty six patients with GC were enrolled to the study. Patients were divided into two groups; group I (nonmetastatic GC, n=65) and group II (metastatic GC, n=61). Paraoxonase 1 activity, albumine and lactate dehidrogenase levels and whole blood count were analyzed. Union Internationale Contre le Cancer system was used for staging procedure. Results. Patients at advanced N or M stage have significantly lower levels of PON1 (34.26 U/L and 29.88 U/L, p=0.04 and p=0.03; respectively). Gender, Lauren's classification, grade, localization and T stage of tumor have nonsignificant impact on PON1 activity. PON1 activity was a significant prognostic factor in GC as well as metastasis, localization of tumor and low hemoglobine or albumine level. Conclusions. Lower levels of paraoxonase 1 activity in patients with metastatic gastric cancer may reflect the presence of enhanced oxidative stress in advanced stages of the disease. PON1 activity is a significant and independent predictor of overall survival. Identifying novel prognostic markers can help to establish appropriate therapeutic strategies, to determine preventive measures and to improve survival rates. © Società Editrice Universo (SEU).
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    Serum levels of neopterin, tumor necrosis factor-alpha and Interleukin-6 in preeclampsia: relationship with disease severity.
    (2012) Ozler A.; Turgut A.; Sak M.E.; Evsen M.S.; Soydinc H.E.; Evliyaoglu O.; Gul T.
    There are many studies evaluating the role of inflammation in the pathogenesis of preeclampsia. However, little is known about the relationship between the severity of inflammation and the severity of preeclampsia due to insufficient of studies reporting this matter. To investigate the maternal serum concentrations of IL-6, TNF-alpha and Neopterin in patients with mild preeclampsia and severe preeclampsia and HELLP (hemolysis, elevated liver enzymes, low platelet count) syndrome in preeclampsia and determine their association with the severity of the disease. Patients, hospitalized with the diagnosis of preeclampsia between October 2011 and March 2012, were included in the study. The patients with preeclampsia were divided into three groups as mild preeclampsia, severe preeclampsia and HELLP syndrome. The control group was comprised of normotensive and uncomplicated pregnant women. The serum levels of IL-6, TNF-alpha and Neopterin (NEO) were determined, using enzyme-linked immunosorbent assay. Spearman's rank correlation tests were used for the correlations between the serum levels of inflammatory markers and the severity of preeclampsia. There was no observed significant difference among mean serum TNF-alpha and IL-6 levels of four groups (p > 0.05). The median serum concentration of NEO in subjects with mild preeclampsia of 14.1 nmol/L and severe preeclampsia of 14.8 nmol/L was significantly higher than that of 10.3 nmol/L in normotensive controls (p = 0.013; p = 0.000 respectively). In addition, the median serum concentration of NEO was detected to be highest in subjects with HELLP syndrome. The serum levels of NEO was well correlated with the severity of preeclampsia (r = 0.533, p = 0.000). The serum levels of NEO, an important marker of cellular immunity, associated with severity of disease in patients with preeclampsia.