31 results on '"GÜREL, Ahmet"'
Search Results
2. Thymosin alpha 1 attenuates lipid peroxidation and improves fructose-induced steatohepatitis in rats
- Author
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Armutcu, Ferah, Coskun, Ömer, Gürel, Ahmet, Kanter, Mehmet, Can, Murat, Ucar, Fatma, and Unalacak, Murat
- Published
- 2005
- Full Text
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3. Doppler Evaluation of Pediatric Goiter: Effect of Mandatory Iodination
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Özer, Tülay, Demirel, Fatma, Mahmutyazcoĝlu, Kamran, Gürel, Ahmet, Özdemir, Hüseyin, Savranlar, Ahmet, Demircan, Nejat, and Gündoĝdu, Sadi
- Published
- 2005
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4. The effect of CAPE on lipid peroxidation and nitric oxide levels in the plasma of rats following thermal injury
- Author
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Hoşnuter, Mübin, Gürel, Ahmet, Babucçu, Orhan, Armutcu, Ferah, Kargi, Eksal, and Işikdemir, Ahmet
- Published
- 2004
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5. The Effects of Glucose-Insulin-Potassium Solution and BN 52021 in Intestinal Ischemia-Reperfusion Injury
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Aldemir, Mustafa, Gürel, Ahmet, Büyükbayram, Hüseyin, and Taçyldz, İbrahim
- Published
- 2003
6. Asymmetric dimethylarginine contributes to airway nitric oxide deficiency in patients with COPD.
- Author
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Aydin, Murat, Altintas, Nejat, Cem Mutlu, Levent, Bilir, Bulent, Oran, Mustafa, Tülübaş, Feti, Topçu, Birol, Tayfur, İsmail, Küçükyalçin, Volkan, Kaplan, Gizem, and Gürel, Ahmet
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ASYMMETRIC dimethylarginine ,NITRIC oxide reduction ,OBSTRUCTIVE lung diseases ,PATHOLOGICAL physiology ,ENZYME-linked immunosorbent assay ,REGRESSION analysis - Abstract
Introduction Asymmetric dimethylarginine (ADMA) and nitric oxide (NO) show their mechanism of action reciprocally, the balance between these molecules contributes to the tight regulation of airways tone and function. Objectives The aim of this study to determine the serum levels of ADMA and NO in patients with chronic obstructive pulmonary disease (COPD) and establish whether their level vary in relation to forced expiratory volume in 1s (FEV
1 ), to assess their role in pathophysiology of COPD. Materials and Methods This study consisted of 58 patients with COPD and 30 healthy subjects. Serum ADMA and NO levels were measured using enzyme-linked immunosorbent assay and the colorimetric method, respectively. Results Serum ADMA levels were significantly higher, however, NO levels were lower in patients with COPD compared with controls. ADMA levels were inversely correlated with NO levels. Serum ADMA and NO were significantly correlated with FEV1 . Multivariable logistic regression analysis revealed that serum ADMA and NO were independently and significantly associated with the presence of COPD. Multiple linear regression analysis showed that COPD was positively associated with ADMA, additionally COPD and ADMA were independently and inversely associated with NO. NO levels were decreased, ADMA levels were increased compliant with progression of COPD stages. Conclusion While circulating ADMA is higher, NO is lower in COPD and both show a strong correlation to the degree of airflow limitation. ADMA seems to be a possible new marker of prognosis of COPD and can be a novel therapeutic target for the treatment of COPD. [ABSTRACT FROM AUTHOR]- Published
- 2017
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7. Plasma urotensin II and neurokinin B levels in acute myocardial infarction and stable coronary artery disease.
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Akkoyun, Dursun Çayan, Akyüz, Aydın, Alpsoy, Şeref, Gürel, Ahmet, Güler, Niyazi, Değirmenci, Hasan, and Gürkan, Ümit
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BLOOD plasma ,NEUROKININ B ,MYOCARDIAL infarction ,UROTENSINS ,CORONARY disease - Abstract
Objective: This aim of the study is to investigate whether there are possible plasma urotensin-II (U-II) and neurokinin B (NKB) level changes in patients with acute myocardial infarction (AMI) or not and plasma urotensin-II (U-II) and neurokinin B (NKB) level changes in patients with acute myocardial infarction (AMI) and stable coronary artery disease (CAD) and to evaluate whether there is any relationship between these changes and the pathogenesis of these diseases. Methods: This is a prospective case-control study. Three groups were formed from randomly admitted patients with AMI, stable CAD, and controls. Biochemical parameters and U-II and NKB levels were measured. Patients with congestive heart failure, chronic hepatic and renal failure, severe cardiac valve disease, and severe pulmonary hypertension were excluded from the study. The normality of the data was evaluated using the Kolmogorov-Smirnov test. We compared the three groups with one-way ANOVA and Tukey test (Kruskal-Wallis test and Mann-Whitney U test). Results: Compared with controls (n=31) and CAD patients (n=32), AMI patients (n=32) had lower U-II and NKB levels. In cases of stable CAD, U-II and NKB levels were similar. A positive correlation was found between U-II and NKB (r=0.720; p=0.000). U-II and NKB were poorly correlated with left ventricle ejection fraction but not with C-reactive protein. Conclusion: We found that U-II and NKB levels were lower in patients with AMİ in than those with CAD or the control group. According to our findings, the decreased U-II and NKB levels were related to complicated atherosclerotic events. [ABSTRACT FROM AUTHOR]
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- 2015
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8. Relationship among MIF, MCP-1, viral loads, and HBs Ag levels in chronic hepatitis B patients.
- Author
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GÜNES, Hayati, METE, Rafet, AYDIN, Murat, TOPÇU, Birol, ORAN, Mustafa, DOĞAN, Mustafa, YILDIRIM, Oğuzhan, ERDEM, İlknur, TOPKAYA, Aynur EREN, and GÜREL, Ahmet
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CHRONIC hepatitis B ,MACROPHAGE migration inhibitory factor ,VIRAL load ,MONOCYTE chemotactic factor ,CELL surface antigens ,PARAMETER estimation ,PATIENTS - Abstract
Background/aim: To determine whether macrophage migration inhibitory factor (MIF) and monocyte chemoattractant protein-1 (MCP-1) levels in patients with hepatitis B (HB) are different than in normal individuals and whether the HB surface antigen (HBs Ag) level and viral load are correlated with each other and with the two aforementioned parameters. Materials and methods: Sera were obtained from 52 chronic active HB (CAHB) patients and 33 healthy controls, and their MIF and MCP-1 levels were measured. Statistical analyses were performed. A value of P < 0.05 was considered statistically significant. Results: The MIF and MCP-1 values of the control group were increased compared to those of the CAHB group. The MIF and MCP-1 levels were negatively correlated with HBs Ag levels and viral loads. The MIF and MCP-1 levels were positively correlated. The HBs Ag levels and the log10 of the viral loads were positively correlated. Conclusion: We conclude that the negative correlation of MIF and MCP-1 with viral load and HBs Ag levels may be due to T-cell deficiency, antinuclear antibody seropositivity, and/or inhibition of chemokine ligand 2 receptors by viral antigens. More studies with a greater number of subjects are needed to evaluate the potential role of MIF and MCP in CAHB. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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9. Investigation of serum macrophage migration inhibitor factor and monocyte chemotactic protein-1 levels in irritable bowel syndrome.
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TÜLÜBAŞ, Feti, ORAN, Mustafa, METE, Rafet, TURAN, Filiz, YILMAZ, Ahsen, YILDIZ, Zeynep Deniz, and GÜREL, Ahmet
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MACROPHAGES ,CELL migration ,MONOCYTE chemotactic factor ,IRRITABLE colon ,ENZYME-linked immunosorbent assay ,INFLAMMATION ,LEUCOCYTES - Abstract
Aim: Irritable bowel syndrome (IBS), a functional disorder of the bowel, has been thought to result from immune activation. The aim of this study was to evaluate macrophage migration inhibitory factor (MMIF) and monocyte chemotactic protein-1 (MCP-1) levels in IBS patients. Materials and methods: We enrolled 30 IBS patients and 30 healthy controls. The MMIF and MCP-1 levels of all patients and controls were detected using commercial enzyme-linked immunosorbent assay kits. Results: Serum MMIF and MCP-1 levels were markedly higher in IBS patients than in controls. White blood cell, neutrophil, lymphocyte, monocyte, eosinophil, and basophil counts did not differ significantly between groups. Conclusion: These results show that alterations in MMIF and MCP-1 affect the proinflammatory process. They also suggest that MMIF and MCP-1 may play a substantial role in IBS. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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10. MCV and MCH Values in Coronary Artery Patients with Positive Gensini Score.
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Tülübaş, Feti, Gürel, Ahmet, Akkoyun, Dursun Cayan, Alpsoy, Şeref, Akyüz, Aydın, Erdoğan, Hasan, and Yılmaz, Ahsen
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DIAGNOSIS , *CORONARY disease , *ERYTHROCYTES , *BASOPHILS , *BLOOD testing , *BLOOD cell count , *STATISTICAL correlation , *EOSINOPHILS , *HEMOGLOBINS , *LEUCOCYTES , *T-test (Statistics) , *RETROSPECTIVE studies , *DATA analysis software , *DESCRIPTIVE statistics , *CORONARY angiography - Abstract
This study aims to research whether gensini scoring of white blood cells and their subgroups and hemoglobin (Hb), hematocrit (Htc), erythroscyte and their computational tests are related, through retrospectively evaluating complete blood cell counts of patients who underwent coronary angiography with coronary artery disease (CAD) early diagnosis. Files of 267 patients, 113 women and 154 men over the age of 18, who came to Namık Kemal University Research and Practice Hospital in August 2011 and January 2012 and underwent coronary angiography with CAD early diagnosis, were scanned retrospectively. Patients were grouped as angio-negative (ANG) and angio-positive (APG) according to coronary angiography results. Gensini Scoring was done in APG patients according to angiography results. Hemogram values studied before coronery angiography as well as age, gender and other diseases of patients in both groups were recorded. When ANG and APG erythrocytic parameters were compared, Hb and Htc values did not differ significantly between groups while a significant difference was observed in mean corpuscular volume (MCV) and mean corpuscular hemoglobin (MCH) values. White blood cell count, neutrophil, lymphocyte and monocyte counts were significantly higher in APG compared to ANG. Eosinophil and basophil values and thrombocytic parameters did not differ significantly between groups. A positive correlation was observed between Gensini Score and MCV, MCH, WBC (leukocyte), neutrophil, lymphocyte and monocyte. Consequently, our findings suggest that erythrocyte has a role in CAD pathogenesis like other blood cells or factors in CAD pathogenesis might affect erythrocyte morphology. [ABSTRACT FROM AUTHOR]
- Published
- 2013
11. Astma ve alerjik rinitli çocuklarda total IgE, C-reaktif protein ve kan sayım parametrelerinin değerlendirilmesi.
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Tülübaş, Feti, Gürel, Ahmet, Donma, Mustafa Metin, Nalbantoğlu, Burçin, Topçu, Birol, and Mut, Zeynep Deniz
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IMMUNOGLOBULIN E , *C-reactive protein , *BLOOD testing , *ASTHMA in children , *HAY fever in children , *ASTHMA risk factors , *CONTROL groups , *PATHOPHYSIOLOGY of asthma - Abstract
Objective: This study aimed to research retrospectively whether asthma and allergic rhinitis are related to total IgE, C-reactive protein (CRP) and complete blood count parameters. Materials and methods: Files of 443 children who applied to pediatric outpatient clinics of our hospital,aged 2-18 were retrospectively investigated. Patients were grouped into three as asthma (n=179), allergic rhinitis (n= 171) and control group (n= 93). Patients' ages, genders, total IgE, CRP and hemogram values were recorded. Results: While eosinophil count, MCHC and total IgE levels were significantly higher in asthma group, MCV levels were significantly lower. Lymphocyte count, CRP and total IgE levels were significantly higher in allergic rhinitis group compared with control group whereas neutrophil count were significantly lower and eosinophil count did not change significantly. Total IgE levels were higher in asthma and allergic rhinitis compared with controls. However, CRP levels were higher only in allergic rhinitis group. MCV levels were significantly lower in asthma group compared with controls. MCHC levels were significantly higher in asthma group compared with allergic rhinitis and control groups. Neutrophil count decreased while lymphocyte count increased significantly. Eosinophil count significantly increased compared with control group whereas a significant difference was not observed between allergic rhinitis and controls. Conclusions: Our findings suggest factors effective in asthma pathogenesis might be effective also in erythrocyte morphology. There are remarkable changes in blood eosinophil levels in asthma and in neuthrophil and lymphocyte levels in allergic rhinitis. Serum total IgE level increases in asthma group whereas it decreases in allergic rhinitis group. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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12. Astımlı Çocuklarda Tedavi Sonrası Total IgE, CRP ve Tam Kan Sayım Parametrelerinin Değerlendirilmesi.
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TÜLÜBAŞ, Feti, GÜREL, Ahmet, DONMA, Mustafa Metin, NALBANTOĞLU, Burçin, TOPÜU, Birol, and YILDIZ, Zeynep Deniz
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ADRENERGIC beta agonists , *ADRENOCORTICAL hormones , *HORMONE therapy , *ASTHMA treatment , *INFLAMMATION prevention , *BLOOD testing , *C-reactive protein , *IMMUNOGLOBULINS , *HEALTH outcome assessment , *TREATMENT effectiveness , *INHALATION administration , *CHILDREN , *THERAPEUTICS - Abstract
Objective: We aimed to study if inhaled corticosteroid and inhaled beta 2 agonist treatment to 2-18 years old children with asthma resulted in recovery in serum total IgE, CRP, and whole blood count levels and/or to evaluate the effect of treatment in comparison to healthy children. Methods: Data regarding pre and post treatment serum total IgE, CRP, and hemogram levels of 2-18 years old, 99 children with asthma, who received inhaled corticosteroid and inhaled beta 2 agonist treatment and who applied to Namık Kemal University Research and Practice Hospital Pediatrics Clinic, were obtained through file scanning. Data regarding demographics and serum total IgE, CRP and hemogram levels of 99 healthy children in control group were also obtained through file scanning. Results: In children with asthma, levels of serum total IgE, lymphocyte, eosinophil and basophil counts and percentages were significantly increased compared to healthy controls, and they were significantly decreased after treatment to the levels of healthy controls. Serum CRP levels, neutrophil counts and percentages were significantly decreased compared to healthy controls, and they were significantly increased after treatment. Conclusions: Inhaled steroid and beta 2 antagonist treatment to children with asthma resulted in recovery in levels of IgE, CRP, and some whole blood count parameters through decreasing inflammation with its anti-inflammatory effect. [ABSTRACT FROM AUTHOR]
- Published
- 2013
13. Evaluation of glucose challenge and oral glucose tolerance test results in pregnancy and estimation of prevalence of gestational diabetes mellitus at Sema Hospital in İstanbul.
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TORAMAN, Ahmet Ruhi, GÜREL, Ahmet, ULUSAL, Zeynep, BÜLBÜL, Gülnihal, DEMİRDÖVEN, Ayşe Gülçin, UZUN, Melek, ÖZCAN, Ali, and ÇAKMAK, Muzaffer
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GLUCOSE tolerance tests , *DIABETES , *ESTIMATION theory , *DISEASE prevalence , *RETROSPECTIVE studies - Abstract
Aim: This study was designed to evaluate glucose screening and oral glucose tolerance test results, and to assess the prevalence of gestational diabetes in pregnant patients admitted to our hospital. Materials and methods: This retrospective study was carried out at Sema Hospital in İstanbul, Turkey. The study subjects were recruited between January 2006 and August 2009. A glucose challenge test (GCT) was given to 1681 pregnant women and based on the results 494 went on to take an oral glucose tolerance test (OGTT). A diagnosis of gestational diabetes mellitus (GDM) was made according to the criteria defined by the National Diabetes Data Group. Results: Out of the 1681 pregnant women tested, 58 were diagnosed with gestational diabetes. Pregnant women with GDM had GCT results greater than or equal to 145 mg/dL. While the percentage of GCT false positives was 87.8% when the cut-off value was taken to be 140 mg/dL, it was calculated to be 84.3% when the cut-off value was taken to be 145 mg/dL. For the 140 mg/dL cut-off value of GCT, specificity was 100% and sensitivity was 4.3%, and for the 145 mg/dL cut-off value of GCT, specificity was 98.3% and sensitivity was 28.3%. Conclusion: The prevalence value in this study was calculated at 3.45%. Pregnant women diagnosed with GDM had GCT results higher than 145 mg/dL. When the cut-off value was increased from 140 mg/dL to 145 mg/dL, a decrease was observed in false positives, and an increase was observed in sensitivity. [ABSTRACT FROM AUTHOR]
- Published
- 2012
14. The Activities of Paraoxonase, Xanthine Oxidase, Adenosine Deaminase and the Level of Nitrite in Pseudoexfoliation Syndrome.
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Yac, Ramazan, Gürel, Ahmet, Ersöz, brahim, Karada, Remzi, Hepen, brahim F., and Duman, Sunay
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PARAOXONASE , *XANTHINE oxidase , *ADENOSINE deaminase , *NITRITES , *CONTROL groups , *OXIDATIVE stress ,DIAGNOSIS of eye diseases - Abstract
AbstractAim:Our purpose was to investigate the possible roles of nitrite levels and the activity of paraoxonase (PON), xanthine oxidase (XO) and adenosine deaminase (ADA) in the pathogenesis of pseudoexfoliation (PEX) syndrome. Methods:Serum samples were taken from 43 patients with PEX and 41 control subjects. The serum PON, XO and ADA activities and nitrite levels were assayed by spectrophotometric methods. Results:The PON, ADA and XO activities and nitrite levels (means ± standard deviation) were 81.72 ± 42.56 U/ml, 19.75 ± 5.72 U/l, 0.16 ± 0.09 U/l and 94.23 ± 27.72 μmol/l in the PEX group, respectively. In the control group, the PON, ADA and XO activities and the nitrite levels were 111.02 ± 43.51 U/ml, 15.21 ± 3.93 U/l, 0.13 ± 0.06 U/l and 61.96 ± 19.05 μmol/l, respectively. The serum PON activity was significantly lower in the PEX group when compared with the control group. The serum XO and ADA activities and nitrite levels were significantly higher in the patients with PEX when compared with the control subjects. Conclusion:Decreased PON (an antioxidant enzyme) activity as well as increased ADA and XO activities and nitrite levels indicate that oxidative stress is increased and purine metabolism is altered in PEX syndrome.Copyright © 2009 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
- Published
- 2009
15. Aqueous Humor and Serum Concentration of Hydroxyproline in Pseudoexfoliation Syndrome.
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Yacı, Ramazan, Ersöz, İbrahim, Aydın, Bahri, Beyaz, Elif, Gürel, Ahmet, Durmuş, Mustafa, and Duman, Sunay
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- 2007
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16. Oxidative Stress and Protein Oxidation in Pseudoexfoliation Syndrome.
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Yağci, Ramazan, Gürel, Ahmet, Ersöz, Ibrahim, Keskin, Uğgur C., Hepşen, Ibrahim F., Duman, Sunay, and Yiğitoğlu, Ramazan
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GLAUCOMA , *RETINAL degeneration , *OXIDATIVE stress , *SUPEROXIDE dismutase , *CARBONYL compounds , *MALONDIALDEHYDE - Abstract
Purpose: To investigate the oxidant/antioxidant status and protein oxidation in pseudoexfoliation syndrome. Methods: The activity of serum superoxide dismutase (SOD) and the levels of serum malondialdehyde (MDA) and protein carbonyl (PC) were measured in 50 patients with pseudoexfoliation (PEX) and in 55 healthy controls. Results: There was significant difference in the SOD activity in PEX group compared with the control group (p < 0.001). In addition, MDA and PC levels were significantly higher in patients than in the controls (p < 0.001). Conclusions: Decrease in SOD activity and the higher levels of MDA and PC indicate increased oxidative stress. Our results suggest a possible role of oxidative stress in pathology of PEX syndrome. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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17. Use of Melatonin to Prevent Selenite-Induced Cataract Formation in Rat Eyes.
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Yağci, Ramazan, Aydin, Bahri, Erdurmuş, Mesut, Karadağ, Remzi, Gürel, Ahmet, Durmuş, Mustafa, and Yiğitoğlu, Ramazan
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CATARACT ,MELATONIN ,LABORATORY rats ,OPHTHALMOLOGY ,SELENITES ,OXIDATIVE stress - Abstract
Purpose: To evaluate effects of melatonin on sodium selenite-induced cataract formation. Methods: Twenty-three Sprague-Dawley rat pups were randomized into three groups. Group 1(n = 9), injected with selenite (s.c.) on postpartum day 10; group 2 (n = 7), injected with selenite (s.c.) on day 10 plus melatonin (i.p.) on days 8–15; group 3 (n = 7), saline-injected controls. Development of cataract was assessed weekly under a dissection microscope. Rat lenses and serums were analyzed for antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT); oxidative stress indicators xanthine oxidase (XO) and malondialdehyde (MDA), a marker of lipid peroxidation; and protein carbonyl (PC), a marker of protein oxidation. Results: Significant differences (p < 0.05) were seen in cataract development by the three groups. All rats developed dense nuclear cataract in group 1. Dense nuclear cataract was not observed in group 2: five of seven rats developed minor cataracts, while the other two had clear lenses. In control rats (group 3), all lenses remained clear. In selenite group (group 1), lens and serum levels of MDA, PC, and XO were significantly higher and levels of SOD and CAT were significantly lower than those in control group (p < 0.001). In selenite+melatonin group (group 2), lens and serum levels of MDA, PC, and XO significantly decreased and levels of SOD and CAT significantly increased when compared with selenite group. Conclusions: Studies with the rat selenite cataract model strongly support the activity of melatonin as an endogenous antioxidant and anticataract agent. [ABSTRACT FROM AUTHOR]
- Published
- 2006
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18. The Status of Oxidants and Antioxidants in the Neutrophils of Patients with Recurrent Aphthous Stomatitis.
- Author
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Altinyazar, Hilmi Cevdet, Gürel, Ahmet, Koca, Rafet, Armutçu, Ferah, and Ünalacak, Murat
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STOMATITIS , *OXIDIZING agents , *ANTIOXIDANTS , *NEUTROPHILS , *PATIENTS , *LEUCOCYTES , *OXIDATIVE stress - Abstract
Recurrent aphthous stomatitis (RAS) is an inflammatory condition of unknown etiology. The exact role of the leukocytes in the pathogenesis of RAS is not known. The aim of this study was to evaluate the status of the oxidative system in neutophils of RAS patients. A total of 26 patients and 22 sex and age matched healthy control subjects were analyzed by measuring intracellular oxidant/antioxidant enzymes and related parameters; myeloperoxidase (MPO), xanthine oxidase (XO), catalase (CAT), superoxide dismutase (SOD), adenosine deaminase (AD), malondialdehyde (MDA) and nitric oxide (NO). Statistically significant increases in the activities of SOD, CAT and levels of MDA, NO were detected in the neutrophils of patients. There was no significant difference in MPO, AD and XO activities of neutrophils. Although the functions of neutrophils were normal, there may be an oxidative stress affecting neutrophils in RAS. [ABSTRACT FROM AUTHOR]
- Published
- 2006
19. Biochemical Stress Indicators of Greater Wax Moth Exposure to Organophosphorus Insecticides.
- Author
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Içen, Ender, Armutçu, Ferah, Büyükgüzel, Kemal, and Gürel, Ahmet
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ACETYLCHOLINESTERASE ,INSECTICIDES ,HOMEOSTASIS ,MALONDIALDEHYDE ,AMINOTRANSFERASES ,LARVAE - Abstract
Although acetylcholinesterase (AChE) is the primary target of organophosphorus insecticides (OPs), increasing evidence regarding their secondary effects suggests that OPs disturb homeostasis of insects by generating free radical intermediates that trigger lipid peroxidation. We therefore investigated alterations in lipid peroxidation product, malondialdehyde (MDA) content, and alanine aminotransferase (ALT) and aspartate aminotransferase (AST) activities, in conjunction with AChE activity as biochemical stress indicators in greater wax moth, Galleria mellonella (L.) larvae for OPs methyl parathion (MP) and ethyl parathion (EP). The effects of MP and EP were first investigated by rearing the young larvae on an artificial diet containing 0.01, 0.1, 1, 10, and 100 ppm of each insecticide. Second, the mature larvae were injected with 0.05, 0.5, 5, 50, and 500 ng of insecticides for determining the changes in biochemical stress responses. The diet with lowest level of MP significantly decreased the activities of all measured enzymes, whereas it increased MDA content. However ALT and AST were significantly higher in the larvae reared with the diet with high levels of MP than in control larvae. All tested levels of MP resulted in a decrease in AChE activity. The lowest level of EP in diet (0.01 ppm) significantly increased ALT activity, whereas it reduced that of AChE. This insecticide at 0.1 ppm resulted in reduced AST activity, but 1 ppm in diet elevated AST activity and MDA content. EP at 0.1 ppm and higher levels in the diet reduced ALT activity. All dietary EP levels significantly decreased AChE activity. ALT, AST, and AChE were lower in larvae fed with the diet containing 100 ppm ethyl parathion compared with larvae on control diet. MP at 50 ng per larva increased ALT and AST activities from 35.42 ± 0.74 and 26.34 ± 0.83 to 203.57 ± 1.09, and 122.90 ± 1.21 U/g, respectively, when the mature larvae were injected. All injected doses of... [ABSTRACT FROM AUTHOR]
- Published
- 2005
20. Effects of Early Phase of Preconditioning on Rat Testicular Ischemia.
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Ceylan, Haluk, Yüncü, Mehmet, Armutçu, Ferah, Gürel, Ahmet, Bagci, Cahit, and Demiryürek, A. Tuncay
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LABORATORY rats ,TESTIS ,ISCHEMIA ,SPERMATIC cord torsion ,SPERMATIC cord diseases - Abstract
Introduction: Brief episodes of ischemia followed by periods of reperfusion generate a powerful protective mechanism in cell, tissue or organ, which increase the resistance to further ischemic damage. This is known as ischemic preconditioning, and has not been investigated in testis. The present experiments were undertaken to determine whether early phase of ischemic preconditioning is evident in rat testis. Materials and Methods: Surgery was conducted under thiopental (60 mg/kg, intraperitoneal) anesthesia in male Wistar rats. Surgical procedures were performed through a midline incision. Group 1 was designed as a sham group. In group 2, which served as the ischemia group, the animals were subjected to unilateral testicular torsion by rotating the left testis 720° in a clockwise direction. Then, this testis was maintained in the torsion position by fixing with a silk suture to the scrotal wall for 90 min. In groups 3 and 4, 5 or 10 min ischemia followed by 10 min reperfusion was introduced, respectively, to induce single cycle ischemic preconditioning. In group 5, which served as the multiple cycle preconditioning group, 3 cycles of 10 min ischemia and 10 min reperfusion were applied prior to 90 min ischemia. Both ipsilateral and contralateral testes were removed from the rats at the end of the experimental periods, and tissue malondialdehyde (MDA), nitric oxide (NO) levels, xanthine oxidase (XO), myeloperoxidase (MPO) and superoxide dismutase (SOD) activities were measured. Both testes were also evaluated histologically, assessing interstitial edema, congestion, hemorrhages, rupture of tubules and Leydig cell proliferation. Results: 90 min ischemia produced a marked increase in MDA level in left testis. However, all ischemic preconditioning protocols used in this study did not show any significant modification in MDA, NO levels or XO, MPO and SOD activities. Histological grading scale was also similar in ischemia and preconditioning groups. Conclusion: These results suggest that there are no protective effects with ischemic preconditioning in rat testis as showed by biochemical analysis and histological examinations. Copyright © 2005 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]
- Published
- 2005
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21. Effect of Iodine Supplementation on Goiter Prevalence among the Pediatric Population in a Severely Iodine Deficient Area.
- Author
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Demirel, Fatma, Özer, Tülay, Gürel, Ahmet, Acun, Ceyda, Özdemir, Hüseyin, Tomaç, Nazan, and Ünalacak, Murat
- Published
- 2004
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22. SAGLIKLI KİŞİLERDE MALONDİALDEHİT VE KONJUGE DİEN İLE YAŞ İLİŞKİSİ.
- Author
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Büyükbaş, Sadik, Gürel, Ahmet, Uz, Efkan, and Bodur, Sait
- Published
- 2000
23. A mother with green breastmilk due to multivitamin and mineral intake: a case report.
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Yazgan, Hamza, Demirdöven, Mehmet, Yazgan, Zerrin, Toraman, Ahmet Ruhi, and Gürel, Ahmet
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- 2012
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24. S30 - DOKSORUBİSİNİN NEDEN OLDUĞU SIÇAN HEPATOTOKSİSİTE VE NEFROTOKSİSİTESİNE KARŞI OMEGA-3 YAĞ ASİTLERİNİN KORUYUCU ETKİSİ.
- Author
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TÜLÜBAŞ, Feti, GÜREL, Ahmet, ORAN, Mustafa, TOPÇU, Birol, ÇAĞLAR, Veli, and UYGUR, Emine
- Abstract
Bu çalışma, antikanser ilaç olan doksorubisinin yol açtığı akut karaciğer ve böbrek hasarı ve bu hasara karşı omega (w)-3 yağ asitlerinin koruyucu etkisini araştırmak amacı ile planlandı. Çalışmada 24 adet Sprague-Dawley cinsi erişkin erkek sıçan 8'er hayvandan oluşan 3 gruba ayrıldı. I. grupdaki sıçanlar kontrol grubu olarak alındı ve sadece intragastrik gavaj yoluyla serum fizyolojik verildi. II. grupdaki sıçanlar doksorubisin grubu olarak alındı ve 28. günde 30 mg/kg tek doz doksorubisin intraperitoneal olarak verildi. III. grupdaki sıçanlar ise doksorubisin ve w-3 yağ asiti grubu olarak alındı ve günlük 400 mg/kg dozunda w-3 yağ asiti intragastrik gavaj yoluyla 30 gün boyunca ve 28. günde de 30 mg/ kg tek doz doksorubisin intraperitoneal olarak verildi. 30 günlük deney süresi sonunda tüm sıçanlardan genel anestezi altında kan, karaciğer ve böbrek doku örnekleri alındı. Hayvanlardan alınan kan örneklerinde GSH ve MDA düzeyleri, karaciğer ve böbrek dokularında GSH ve MDA düzeyleri ile SOD ve GSH-Px aktiviteleri spektrofotometrik olarak ölçüldü. Çalışmamızda, sadece doksorubisin verilen sıçanların serum, karaciğer ve böbrek dokularında, MDA düzeyleri kontrol grubuna göre anlamlı derecede artarken, GSH düzeyi ile GSH-Px ve SOD aktiviteleri kontrol grubuna göre anlamlı olarak azaldı. Doksorubisin ile birlikte w-3 yağ asidi verilen sıçanların serum, karaciğer ve böbrek dokularında MDA düzeyleri doksorubisin verilen grubu göre anlamlı derecede azalırken, GSH düzeyi ile GSH-Px ve SOD aktiviteleri anlamlı derecede arttı. Sonuç olarak omega-3 yağ asitlerinin sıçan karaciğer ve böbrek dokularında doksorubisinin neden olduğu oksidatif hasarı önleyerek olumlu etki gösterdiği tespit edildi. [ABSTRACT FROM AUTHOR]
- Published
- 2012
25. Effect of moderate alcohol intake on lipid peroxidation in plasma, erythrocyte and leukocyte and on some antioxidant enzymes
- Author
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Akkuş, Idris, Gültekin, Fatih, Aköz, Mehmet, Çağlayan, Osman, Bahçaci, Sinan, Can, Ü.Gülsüm, Ay, Mahmut, and Gürel, Ahmet
- Published
- 1997
- Full Text
- View/download PDF
26. Alopesi Areatalı Hastaların Hematolojik Parametrelerinin Normal Populasyon İle Karşılaştırılması.
- Author
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Şener, Ümit, Yanık, Mehmet Emin, Erboğa, Mustafa, Albayrak, Hülya, Erfan, Gamze, and Gürel, Ahmet
- Abstract
Amaç: Bu çalışmada, alopesi areatalı hastaların hematolojik parametrelerinin normal populasyonun hematolojik parametreleri ile karşılaştırılması ve olası değişikliklerin, farklılıkların saptanması amaçlanmıştır. Yöntem: Bu çalışma, geriye dönük olarak gerçekleştirildi. 2013-2015 Yıllarında Namık Kemal Üniversitesi, Araştırma ve Uygulama Merkezi, Deri ve Zührevi Hastalıklar Polikliniği'ne başvurmuş 18-65 yaş arasındaki, 50 (35 erkek, 15 kadın) Alopesi Areata tanısı almış hasta, 50 (35 erkek, 15 kadın) sağlıklı kontrol, çalışmaya dahil edildi. Hastalara ve kontrol grubuna ait hematolojik parametreleri, kayıtlardan öğrenildi. Bulgular: AA' lı hastalara ait eritrosit sayısı (RBC), hemoglobin miktarı (Hb), hematokrit (Htc) değerleri, total lökosit, nötrofil, lenfosit ve monosit sayılarının kontrol grubuna göre anlamlı derecede yüksek, eritrosit dağılım aralığı (RDW-CV) değerinin ise anlamlı derecede düşük olduğu görüldü (sırasıyla p<0,05, p<0,01, p<0,01, p<0,05, p<0,05, p<0,05, p<0,05, p<0,001). Bu parametreler, cinsiyete göre değerlendirildiğinde ise, AA' lı kadınlarda ve erkeklerde RDW-CV değerinin kontrol grubuna göre anlamlı derecede düşük olduğu (sırasıyla p<0,05, p<0,01) saptandı. AA' lı erkeklerde ise Hb ve Htc değerlerinin erkek kontrol grubuna göre anlamlı derecede yüksek olduğu (sırasıyla p<0,01, p<0,01), total lökosit, nötrofil, lenfosit ve monosit sayılarının erkek kontrol grubuna göre anlamlı derecede yüksek saptandı (sırasıyla p<0,01, p<0,05, p<0,01, p<0,05). Sonuç: Bu çalışmada, AA'lı hastalarda normal popülasyona göre eritrositer seride ve lökositer seride gözlenen değişiklikler, hem hematopoezde, hem de hücresel immunitede aktivite artışının olduğunu düşündürmektedir. Bu bulgular, AA hastalarda hematopoezi uyaran faktörlerin varlığına, bu hastalığın immun sistemi aktive ettiğine ve etiyolojisinde otoimmunitenin rol oynamakta olduğuna işaret etmektedir. Öte yandan, bu çalışmada bildirilen verileri destekleyecek yeni çalışmalara ihtiyaç bulunduğu kanaatindeyiz. Objective: To compare hematological parameters in patients with alopecia areata (AA) and in a normal population sample in order to detect potential differences between these two groups. Methods: This was a retrospective study conducted between 2013 and 2015 involving a total of 50 patients diagnosed with alopecia areata (35 male, 15 female) and 50 healthy controls (35 male, 15 female) between 18 and 65 years of age. Hematological parameters of patient and control subjects were retrieved from medical records. Results: Patients with AA had significantly higher red blood cell (RBC) count, hemoglobin (Hb), and hematocrit (Htc) values as well as total leukocyte, neutrophil, and monocyte counts as compared to controls; on the other hand the red blood cell distribution width (RDW-CV) was significantly lower among those with AA (p<0.05, p<0.01, p<0.01, p<0.05, p<0.05, p<0.05, p<0.05, and p<0.001 respectively). RDW-CV was significantly lower in both males and females with AA as compared to controls (p<0.05, and p<0.01, respectively). Males with AA had significantly higher Hb and Htc in comparison with male controls (p < 0.01 for both); similarly, significantly higher total leukocyte, neutrophil, lymphocyte and monocyte counts were found in male AA patients than in control males (p<0.01, p<0.05, p<0.01, and p<0.05, respectively). Conclusion: The changes observed in erythrocyte and leukocyte cell lines in patients with AA as compared to controls suggest an increased activity both in hematopoiesis and cellular immunity. Also, they suggest the presence of factors that may stimulate hematopoiesis in AA patients as well as the presence of an immune activation, indicating that autoimmune processes may play a role in the etiology of this condition. Further studies are warranted to support our observations. [ABSTRACT FROM AUTHOR]
- Published
- 2016
27. İleri kalp yetersizliği hastalarında levosimendanın eritrosit dağılım genişliği uzerine etkisi.
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Akkoyun, Dursun Cayan, Akyüz, Aydın, Alpsoy, Şeref, Aydın, Murat, Güler, Niyazi, and Gürel, Ahmet
- Abstract
Objectives: Levosimendan is a with positive inotropic and hemodynamic effects and is widely used for decompensated heart failure. Purpose of this study is to compare the red cell distribution width (RDW) in advanced heart failure patients who were treated with levosimendan before and after the treatment. Material and methods: One hundred and eight advanced heart failure patients who had levosimendan treatment during hospitalization were screened retrospectively. Echocardiographic and hemogram data before and one month after the treatment were obtained from retrospective records. Values before and after the treatment were compared. Results: Mean RDW was 15.4% before the treatment and mean RDW was 15.2% after the treatment. Mean change was 0.70 and this decrease was found to be statistically significant (p=0.019). Mean left ventricular end diastolic diameter and mean left ventricular end systolic diameter were decreased significantly and mean left ventricular ejection fraction (before 29,3%, after 30.3%, mean change 1,61%, p<0.001) increased significantly after the treatment. There was no change with regard to hemogram, RBC, MCV, MCHC, WBC, NE, LY, PLT, MPV values before and after the treatment. Conclusion: RDW which was shown to have prognostic value in cardiovascular disease was demonstrated to be decreased significantly in patients with advanced heart failure after the levosimendan treatment. [ABSTRACT FROM AUTHOR]
- Published
- 2015
28. Kolon polipli hastalarda hastalığın patogenezinde adenozin deaminaz, ksantin oksidaz, ürik asit ve nitrik oksit metabolizması.
- Author
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Mete, Rafet, Aydın, Murat, TülübaŞ, Feti, Oran, Mustafa, Turan, Bünyamin Cüneyt, Topçu, Birol, Gürel, Ahmet, and AteŞ, Hamit
- Abstract
Objective: Protrusion of colonic mucosa to the lumen is called polyp. Since adenomatous polyps are neoplastic polyps, determining the factors contributing to the pathogenesis of the disease would be helpful in terms of reducing mortality and morbidity. Variety studies have showed that increased oxidative stress might play an important role in carcinogenesis. The aim of this study was to investigate the relationship between adenosine deaminase, xanthine oxidase nitric oxide, uric acid levels and oxidative stress in patients with colonic polyps to help the elucidation of pathophysiology of the disease. Methods: The study was conducted at Gastroenterology Clinics of Namik Kemal University Training and Research Hospital. Thirty-five subjects who underwent colonoscopy because of any gastrointestinal symptom and whose pathologic evaluation of colonoscopic biopsy revealed adenomatous polyps were enrolled as patient group. Control group was consisted of 36 healthy subjects. Uric acid was measured by an autoanalyzer using photometric method. Adenosine deaminase, xanthine oxidase, and nitric oxide were measured manually using a spectrophotometric method. Results: Xanthine oxidase, uric acid, and nitric oxide levels were found to be significantly higher in patients with colonic polyp compared that of the healthy controls. (p = 0.007; p = 0.02; p<0.001, respectively).Although adenosine deaminase levels were significantly higher in patient group, the difference was not statistically significant (p = 0.07) Conclusion: Increased serum levels of adenosine deaminase, xanthine oxidase, nitric oxide, and uric acid levels in patients with colonic adenomatous polyp may indicate the increased oxidative stress and the oxidative impairment of the colonic mucosa which may play an important role in the pathophysiology of the disease. Further studies would be useful to assess antioxidant treatment options in these patients. [ABSTRACT FROM AUTHOR]
- Published
- 2014
- Full Text
- View/download PDF
29. Adenomatöz kolon polipli hastalarda oksidatif stres mekanizmasının paraoksonaz ve arilesteraz üzerinden değerlendirilmesi.
- Author
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Aydın, Murat, Tülübaş, Feti, Bali, İlhan, Mete, Rafet, Oran, Mustafa, Yıldırım, Oğuzhan, Turan, Filiz, and Gürel, Ahmet
- Subjects
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OXIDATIVE stress , *ADENOMATOUS polyps , *PARAOXONASE , *TUMOR growth , *DEGENERATION (Pathology) , *RECTAL cancer , *PATHOLOGICAL physiology - Abstract
Objectives: Adenomatous polyps is characterized by the development of adenomas into the lumen in the rectum and colon. Increased oxidative stress plays a role in many degenerative diseases and tumor pathogenesis. The aim of this study in patients with adenomatous colon polyps paraoxonase, stimulated paraoxonase and arylesterase detection and reveal the relationship between oxidative stress and pathophysiology of the disease. Materials and methods: Patients admitted to Namik Kemal University Research and Training Hospital Gastroenterology Clinic with adenomatous polypossis and healty controls were studied. Paraoxonase, stimulated paraoxonase and arylesterase measurements were performed spectrophotometrically with manual methods. Results: The levels of paraoxonase and stimulated paraoxonase activity in patients with adenomatous polyps were found to be significantly lower than healthy controls, arylesterase activity were significantly higher than in healthy controls, but the difference was not statistically significant. Conclusion: A significant decrease in serum paraoxonase and stimulated paraoxonase activity lead to an increase in oxidative stress may play a role in the pathophysiology of adenomatous colon polyps. [ABSTRACT FROM AUTHOR]
- Published
- 2013
30. Prevalence of Cytopenia and Evaluation of Its Clinical Significance in Children with influenza A(H1N1)
- Author
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Yazgan, Hamza, Yokuş, Osman, Çaşkurlu, Hülya, Akkaş, Timuçin, Demirdöven, Mehmet, Ruhi Toraman, Ahmet, Çakmak, Muzaffer, and Gürel, Ahmet
- Abstract
Aim: Although influenza A causes flu epidemics every year, in 2009 the virus named influenza A H1N1 caused a pandemic. Mortality rates were reported higher than expected due to secondary infections. The aim of this study is to evaluate cytopenia which is one of the hematologic complications in patients who present with flu symptoms and are positive for influenza A H1N1. Method: 503 patients presenting at our Pediatrics Clinic with flu symptoms in November and December 2009 were retrospectively analyzed for epidemiologic and hematologic findings. The diagnosis of H1N1 was made with antigen tests studied on the nasopharyngeal swab. Result: 269 cases were male and 234 were female. Mean age of the patients was 8.8 years (six months- 17 years). 149 of 503 cases (29.6%) were positive for influenza A and 354 cases (70.4%) were negative. Sixty-three (42%) of positive cases underwent full blood count. Nine (14.3%) of these had leucopenia, 12 (19%) had neutropenia and 10 (15.9%) had lymphopenia. Hemogram was performed on 120 cases who were negative for influenza A. Only three (2.5%) of these had leucopenia, 2 cases (1.7%) had neutropenia and 1 case (0.8%) had lymphopenia. The difference between the groups was statistically significant (p<0.004, p<0.001, p<0.001). None of the cases had anemia or thrombocytopenia. Cytopenia resolved in the follow-up with the disappearance of symptoms and there was no permanent morbidity in any of the cases. Conclusion: Influenza A H1N1 infection leads to leucopenia but does not cause permanent cytopenia. Key words: Influenza A, H1N1, cytopenia. [ABSTRACT FROM AUTHOR]
- Published
- 2010
31. Demir Eksikliği Anemisi Hastalarında Serum Lipid Düzeylerinin Değerlendirilmesi.
- Author
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TÜLÜBAŞ, Feti, ORAN, Mustafa, METE, Rafet, YILMAZ, Ahsen, YILDIZ, Zeynep Deniz, and GÜREL, Ahmet
- Abstract
Objective: Several metabolic pathways are affected by the reduction in the amount of iron in iron deficiency anemia (IDA). As a result, some hormonal control mechanisms, especially carbohydrates, proteins, nucleic acid metabolism, are influenced. In this study, we aimed to investigate the effect of IDA on serum lipid profile. Method: Files of 30 patients with IDA and 30 healthy people (both groups aged 18-60), who consulted to internal medicine and gastroenterology clinic in Namık Kemal University Faculty of Medicine, were scanned. The lipid and blood parameters of these people as well as their demographics were recorded. Results: While serum total cholesterol and low-density lipoprotein (LDL) levels were markedly lower in IDA cases than in controls, serum triglyceride, high-density lipoprotein (HDL) and very low-density lipoprotein (VLDL) levels did not differ in patients with IDA compared with the control group. Conclusion: It was observed that serum total cholesterol and LDL levels, whose main content is cholesterol, were decreased in IDA. We consider that reduction of iron levels changes cholesterol metabolism. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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