Ali Atas

Harran University, Charan, Şanlıurfa, Turkey

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Publications (13)13.91 Total impact

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    ABSTRACT: The aim of the study was to evaluate the effects of short-term exercise on total antioxidant status (TAS), lipid hydroperoxide (LOOHs), total oxidative status (TOS) and oxidative stress index (OSI) in adolescent athletes. A total of 62 adolescent participated in the study. Athletes were trained regularly 3 days a week for 2 hours. All subjects followed a circuit exercise program. Blood samples were collected just before and immediately after the exercise program. Antioxidant status was evaluated by measuring the TAS level in the plasma. Oxidative status was evaluated by measuring the total peroxide level. The percentage ratio of TAS to total peroxide level was accepted as the OSI. Plasma triglyceride, total cholesterol, LDL, HDL and VLDL were measured by automated chemical analyzer using commercially available kits.There was a significant increase in TOS (p<0.05) and OSI (p<0.01) levels and a significant decrease in TAS levels (p<0.01) compared to the resting state. There were no significant changes in LOOHs levels before and after the short-term exercise. After short-term exercise, the balance between oxidative stress and antioxidant status moves towards oxidative stress as a result of increasing oxidants and decreasing antioxidants.
    Biology of Sport 09/2010; · 0.53 Impact Factor
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    ABSTRACT: Regular physical activity may play a protective role against cardiovascular disease in adults, and paraoxonase activity may serve to mediate this effect. This study compared paraoxonase activity and that of other antioxidative agents in adolescent athletes compared with inactive youth. Paraoxonase level was 177.32 +/- 100.10 (U/L) in children with regular physical activity and 98.11 +/- 40.92 (U/L) in the control group (P < 0.0001). The levels of total antioxidative capacity, total oxidative status, oxidative stress index, and lipid hydroperoxide were significantly higher in the athlete group compared with controls (P < 0.0001). Paraoxonase activity was found to be greater in adolescent athletes, suggesting that regular exercise might provide a cardio-protective effect by this means.
    Pediatric exercise science 02/2010; 22(1):93-104. · 1.61 Impact Factor
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    ABSTRACT: Osteoporosis in children is rare and mostly secondary to such conditions as prolonged immobilization, malabsorption syndromes, corticosteroid excess, osteogenesis imperfecta, celiac disease, Turner syndrome, and malignancy. Idiopathic juvenile osteoporosis (IJO) is a very rare condition of primary bone demineralization that presents in childhood. IJO, a disease of unknown etiology, manifests typically by pain, bone deformities, and fractures. Diagnosis of IJO was made by excluding other common causes of osteoporosis in this age. Bisphosphonates, calcitriol, fluoride, and calcitonin have been administered therapeutically, but the results were equivocal. Usually the disease remits by itself. Patient that has serious osteoporosis and high thyroid stimulating hormone level was diagnosed as IJO by eliminating secondary reasons. We report this case, whose symptoms were disappeared after parenteral pamidronat treatment, and he was reexamined owing to anemia and trombositopenia, and diagnosed as B-cell acute lymphoblastic leukemia, just to emphasis the importance of close follow-ups of IJO patients.
    Journal of Pediatric Hematology/Oncology 09/2009; 31(8):588-91. · 0.96 Impact Factor
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    ABSTRACT: Asthma is a disease where there is an accumulation of collagen in the reticular basal membrane of the airway leading to chronic inflammation. The enzyme prolidase plays an important role in the breakdown of collagen and the breakdown of intracellular protein especially in the final stage when peptides and dipeptides contain a high level of proline. To evaluate the relationship between prolidase activity and oxidative status in asthma patients. Comparison was made between 42 patients diagnosed with bronchial asthma and 32 healthy children of similar age and gender. Serum prolidase activity was measured spectrophotometrically. Oxidative status was determined using total antioxidant capacity (TAC) and total oxidant status (TOS) measurement. The prolidase activity of the asthma patient group was statistically significant compared with the control group (P< or =0.001). TAC and TOS levels in the asthma patient group were higher than the control group (P< or =0.001, P< or =0.002, respectively). No correlation was found between the prolidase and oxidative levels of the two groups. A positive correlation was determined between the prolidase activity and TAC in the asthma patient group (P< or =0.001, r=0.501). The prolidase enzyme activity, which plays a role in the collagen turnover, was low in the asthma patients; therefore, their collagen metabolism had undergone a change and this indicates that there may be an effect on the accumulation of collagen in the reticular basal membrane. Moreover, the high level of TOS indicates that these patients were exposed to severe oxidative stress with an increased TAC response.
    Journal of Clinical Laboratory Analysis 02/2009; 23(2):132-8. · 1.14 Impact Factor
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    ABSTRACT: To compare paraoxonase activity and changes in oxidative status in asthmatic children and healthy children by determining serum paraoxonase activity and total oxidative status, total antioxidant capacity and lipid hydroperoxidation. Forty two asthmatic children were compared with 32 healthy children of similar age and sex. To evaluate the paraoxonase and oxidative status, total antioxidant capacity and lipid hydroperoxidation were examined. Serum paraoxonase activity was evaluated by measuring the rate of paraoxon hydrolosis. Oxidative status was evaluated by the method developed by Erel. Lipid hydroperoxide was measured by an iodometric method. In comparison with the healthy control group, the paraoxonase activity of the asthmatic children was found to be low (163.7 +/- 73.0 (U/L) and 349.2 +/- 153.9 (U/L), P = 0.002) and total oxidant status (9.0 +/- 3.5 micromol H2O2 Eq/L and 13.4 +/- 7.0 micromol H2O2 Eq/L, P =0.002), total antioxidant capacity (5.5 +/- 2.5 micromol Trolox Eq/L and 1.0 +/- 0.6 micromol Trolox Eq/L, P < 0.001), and lipid hydroperoxidation values (9.9 +/- 3.4 micromol H2O2 Eq/L and 4.4 +/- 1.5 micromol H2O2 Eq/L, P < 0.001) were found to be high. The high density lipoprotein (HDL) concentration of the asthmatic children was lower than that in the control group (40.1 +/- 9.2 mg/dl and 54.5 +/- 15.9 mg/dl, P < 0.001) In asthmatic children, when total oxidant status, total antioxidant capacity and lipid hydroperoxidation levels increase, paraoxonase activity decreased.
    Clinical and investigative medicine. Medecine clinique et experimentale 01/2009; 32(5):E327-34. · 1.15 Impact Factor
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    ABSTRACT: Increased production of reactive oxygen species leading to an imbalance between the oxidative forces and the antioxidant defense systems favoring an oxidative injury has been implicated in the pathogenesis of asthma. The aim of the study was to investigate the peripheral DNA damage, and its association with oxidative and antioxidative measurements in children with asthma bronchiale. The study population contained 42 children with asthma bronchiale and 32 healthy controls. DNA damage was assessed by alkaline comet assay in peripheral lymphocytes. Plasma levels of total antioxidant status (TAS), total peroxide concentration (LOOHs), and total oxidant status (TOS) were determined. In asthma bronchiale patients, DNA damage was significantly higher than in controls (17.9 +/- 11.8 AU vs. 1.2 +/- 2.0 AU, p < 0.001). Plasma TOS and LOOHs were higher in patients than in healthy controls (13.4 +/- 7.0 vs. 9.0 +/- 3.5, p = 0.002; 9.9 +/- 3.4 vs. 4.4 +/- 1.5, p < 0.001, respectively). Plasma TAS level in patients was higher than in healthy controls (5.5 +/- 2.5 vs. 1.0 +/- 0.6, p < 0.001). DNA damage was correlated with TOS (r = 0,616, p < 0.001). The findings indicated that lymphocyte DNA damage level increases in children with asthma bronchiale. Elevated DNA damage may be related to increased oxidative stress. However, the mechanism of this association, and whether it is direct or indirect, remains to be explored.
    Pediatric Allergy and Immunology 10/2008; 20(4):370-6. · 3.38 Impact Factor
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    ABSTRACT: In this study, Ves-matic erythrocyte sedimentation rate and micro-erythrocyte sedimentation rate methods were compared on 96 subjects mean age 4.9+/-4.3 years. Ves-matic erythrocyte sedimentation rate an automated method, and micro-erythrocyte sedimentation rate method required minimal bloods are various approaches on the erythrocyte sedimentation rate. An important relationship between that the Ves-matic and micro-erythrocyte sedimentation rate was revealed. Although there was significantly correlation between these two methods, they are different to use interchangeably. Our study implies that "Micro-Automated Erythrocyte Sedimentation Rate Systems" could be developed which require a few amounts of blood and study automatically.
    Journal of Clinical Laboratory Analysis 02/2008; 22(1):70-2. · 1.14 Impact Factor
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    ABSTRACT: Neonatal jaundice is the result of an imbalance between bilirubin production and elimination. Bilirubin conjugation in newborns is significantly impaired in the first few days; even a small increase in the rate of production can contribute to the development of hyperbilirubinemia. Hemolysis has a significant role in bilirubin increase in newborns. Intrauterine is tolerated by the maternal metabolism in life. When hemolysis takes place, a decrease is accepted in the haptoglobin and hemopoexin blood levels binding hemoglobin in the environment. Therefore, it may be considered that haptoglobin and hemopoexin from the early period umbilical cord (UC) blood in newborns may be an indicator in determining jaundice likely to develop in later stages. Babies were called to the control polyclinic in the third and fifth days. Eighty-four babies with normal term birth were included in the study. Gestational age of the mothers was 39.5+/-1.5 weeks in average. A significant negative correlation was found between the haptoglobin level from the UC taken during delivery and the bilirubin value in the fifth day (r=-0.345; P=0.001). The haptoglobin value from the blood of the UC can be used as a guiding indicator to demonstrate the future occurrence of jaundice in newborns. This way, the babies with high jaundice risk may be detected earlier and closer follow-up of these babies can be obtained. As a result, the haptoglobin level of the blood from the UC during delivery allows us to make an early prediction on whether neonatal jaundice will occur.
    Journal of Clinical Laboratory Analysis 02/2008; 22(6):409-14. · 1.14 Impact Factor
  • Indian pediatrics 05/2002; 39(4):362-5. · 1.01 Impact Factor
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    ABSTRACT: Protein energy malnutrition (PEM) is a common pediatric health problem in developing countries. Although the clinical features of PEM are well known, its pathophysiology is still unclear. Free radicals have been implicated in pathogenesis of PEM. In the present study, oxidant/anti-oxidant status in marasmus was investigated. Red cell glutathione, glutathione peroxidase and superoxide dismutase and their related cofactors, serum selenium and copper, were studied in marasmic and control children. Serum lipid peroxidation was also evaluated to assess oxidative stress. The red cell glutathione levels and glutathione peroxidase activities were found to be significantly lower in the marasmic children than in the controls. Red cell superoxide dismutase (SOD) activity was not different between two groups. Serum selenium and copper concentrations were significantly lower in the marasmic children than in the control subjects. The malondialdehyde concentration, which is an index of lipid peroxidation, was significantly higher in the marasmic group compared with the controls. The anti-oxidant defense system was affected in marasmic children. Reduced anti-oxidant status and increased oxidative stress occurs in marasmic children.
    Pediatrics International 07/2000; 42(3):289-92. · 0.73 Impact Factor
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    ABSTRACT: Leukopenia and thrombocytopenia are rare findings in systemic onset juvenile rheumatoid arthritis (S-JRA), and if present, bone marrow (BM) examination is necessary to exclude malignant diseases. We report here a 13.5-year-old boy with S-JRA who had severe thrombocytopenia and mild leukopenia, without arthritis, at the onset of the disease. BM was hypercellular with increased numbers of myeloid precursors and megakaryocytes. After treatment with acetylsalicylic acid, leukocyte and platelet counts returned to normal levels, and after two months chronic arthritis developed.
    The Turkish journal of pediatrics 01/2000; 42(2):162-4. · 0.56 Impact Factor
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    ABSTRACT: Purpose : We report a case of acute isoniazid intoxication presented with convulsions, and coma. Case : An 8-year-old boy had taken 10 isoniazid tablets (100mg/tb) which had been started as a prophylactic. A nasogastric catheter was administered and gastric lavage was performed followed by the administration of activated charcoal. Immediately after the procedure, sudden convulsions began, which subsided within five minutes of the administration of diazepam infusion. As an antidote, Pyridoxine 1.5 gr ( 50 mg/kg/day),was administered intravenously. After 8 hours the patient regained consciousness, his general condition normalized and oral nutrition was started. Conclusions : Pyridoxine administration is the best way of treating convulsions. Parenteral pyridoxine administration is an effective method in isoniazid intoxication.
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    ABSTRACT: The frequency and etiology of anemia were investigated in 2,913 children between six and 16 years of age in Sanliurfa, in the southeast region of Turkey. Anemia was found in 142 (7.8%) children in the 6-11 years of age group, and in 16 (1.5%) in the 12-16 years of age group; in total, in 158 (5.4%) children. Causes were iron deficiency in 93 (58.9%) children, beta-thalassemia heterozygosity in 10 (6.3%) children, chronic disease that causes anemia of inflammation in 30 (19.0%) children, and intestinal parasitic infections in 17 (10.8%) children. In eight (5.1%) children, the cause of anemia could not be determined. The study's results showed that iron deficiency anemia and chronic and parasitic disease are important problems in schoolchildren of Sanliurfa, while beta-thalassemia and hemoglobinopathies have less importance.
    The Turkish journal of pediatrics 42(2):91-5. · 0.56 Impact Factor