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Full-Text Articles in Medicine and Health Sciences
The Relationship Between Hla-G Levels And Oxidative Stress Parameters In Patients With Breast Cancer, Sema Bozali̇oğlu, Nedret Kiliç, Zuhal Yildirim, Bi̇lkay Baştürk, Osman Kurukahveci̇oğlu
The Relationship Between Hla-G Levels And Oxidative Stress Parameters In Patients With Breast Cancer, Sema Bozali̇oğlu, Nedret Kiliç, Zuhal Yildirim, Bi̇lkay Baştürk, Osman Kurukahveci̇oğlu
Turkish Journal of Medical Sciences
To investigate serum HLA-G levels and its correlation with oxidative stress and antioxidant parameters in breast cancer patients. Materials and methods: The patient group consisted of 25 individuals with breast cancer who were operated on in the General Surgery Department of Gazi University’s Faculty of Medicine. Thirty-one individuals who had no history of any kind of cancer, allergic diseases, diabetes, or rheumatic and immunological disease constituted the control group. Results: Results showed that malondialdehyde (MDA), advanced oxidation protein products (AOPPs), and HLA-G levels in the patient group were statistically and significantly high compared to the control group (P < 0.001). While vitamin C levels were significantly lower in the patient group (P < 0.05), an insignificant difference in glutathione peroxidase (GPx) and total sulfhydryl group (R-SH) levels in both groups was observed (P > 0.05). Serum …
Investigation Of Serum Paraoxonase-1 Activity And Lipid Levels In Patients With Hyperthyroidism, Gülden Başkol, Kiymet Dolbun Seçki̇n, Fahri̇ Bayram, Fati̇h Tanriverdi̇
Investigation Of Serum Paraoxonase-1 Activity And Lipid Levels In Patients With Hyperthyroidism, Gülden Başkol, Kiymet Dolbun Seçki̇n, Fahri̇ Bayram, Fati̇h Tanriverdi̇
Turkish Journal of Medical Sciences
The present study was designed to investigate the relationship among the serum paraoxonase-1 (PON-1) activity, lipid levels, and thyroid hormone status in patients with hyperthyroidism. Materials and methods: The study group comprised 30 patients with primary hyperthyroidism and 18 normal healthy controls who were matched for age and sex. Serum PON-1 activity was determined by spectrophotometric methods. Results: Serum PON-1 activity was found to be lower in patients compared to controls (P < 0.05). Free triiodothyronine (T3) and free thyroxine (T4) levels were significantly higher in the patient group compared to the control group (P < 0.001 and P < 0.001 respectively). Thyroid-stimulating hormone (TSH) and total cholesterol values were found to be lower in patients than in the controls (P < 0.001 and P < 0.001 respectively). Low-density lipoprotein cholesterol levels were found to be decreased in patients compared to controls (P < 0.005). Triglyceride and high-density lipoprotein cholesterol levels were not significantly different between the 2 groups (P > 0.05). Serum PON-1 activity was found to be negatively correlated with free T4 levels (r = -0.324, P < 0.05) and positively correlated with total cholesterol (r = 0.330, P < 0.05) and TSH levels (r = 0.577, P < 0.001). Conclusion: Our PON-1 results show that there is decreased antioxidant defense in patients with hyperthyroidism. Therefore, we think that effective antioxidant therapy to increase PON-1 activity may be a therapeutic option in patients with hyperthyroidism.
Effects Of Lycopene On Plasma Glucose, Insulin Levels, Oxidative Stress, And Body Weights Of Streptozotocin-Induced Diabetic Rats, Muhsi̇n Aydin, Sefa Çeli̇k
Effects Of Lycopene On Plasma Glucose, Insulin Levels, Oxidative Stress, And Body Weights Of Streptozotocin-Induced Diabetic Rats, Muhsi̇n Aydin, Sefa Çeli̇k
Turkish Journal of Medical Sciences
To determine possible therapeutic effects of oral lycopene supplementation on plasma insulin levels, lipid peroxidation, blood glucose levels, and the antioxidant defense system of streptozotocin-induced diabetic rats. Materials and methods: Classical biochemical methods were used to determine plasma malondialdehyde (MDA), nitric oxide (NO), glutathione peroxidase (GSH-Px), catalase (CAT), superoxide dismutase (SOD), and glutathione (GSH) levels. Enzyme-linked immunosorbent assay was used to determine plasma insulin levels and reverse transcriptase-polymerase chain reaction was used to determine the levels of brain antioxidant enzymes (SOD, CAT, and GSH-Px). Results: It was found that the diabetes-related increase in blood glucose levels was reduced by supplementation …
Effects Of Royal Jelly On Liver Paraoxonase Activity In Rats Treated With Cisplatin, Serap Yildirim, Ali̇ Karadeni̇z, Akar Karakoç, Abdulkadi̇r Yildirim, Yildiray Kalkan, Nejdet Şi̇mşek
Effects Of Royal Jelly On Liver Paraoxonase Activity In Rats Treated With Cisplatin, Serap Yildirim, Ali̇ Karadeni̇z, Akar Karakoç, Abdulkadi̇r Yildirim, Yildiray Kalkan, Nejdet Şi̇mşek
Turkish Journal of Medical Sciences
To evaluate the protective effects of royal jelly (RJ) on the changes caused by cisplatin in paraoxonase-1 (PON-1) and arylesterase (ARE) activities. Materials and methods: Twenty-four Sprague-Dawley rats were divided into 4 groups of 6: control, royal jelly (300 mg kg^{-1} day^{-1}, cisplatin (7 mg kg^{-1} body weight), and royal jelly (300 mg kg^{-1} day^{-1} plus a single dose of cisplatin (7 mg kg^{-1} body weight). After the experimental procedures, blood and liver tissue samples were taken from each animal. The effects of RJ and cisplatin were evaluated by PON-1, ARE (in liver homogenates), and serum alanine aminotransferase measurements. The …
Effects Of 50 Hz Electric Field On Malondyaldehide And Nitric Oxide Levels In Spinal Cord Of Rats At Prenatal Plus Postnatal Period, Ertuğrul Uzar, Haci Ramazan Yilmaz, Mustafa Yilmaz, Efkan Uz, Vedat Ali̇ Yürekli̇, Bumi̇n Dündar, Hasan Rifat Koyuncuoglu, Selçuk Çömlekçi̇
Effects Of 50 Hz Electric Field On Malondyaldehide And Nitric Oxide Levels In Spinal Cord Of Rats At Prenatal Plus Postnatal Period, Ertuğrul Uzar, Haci Ramazan Yilmaz, Mustafa Yilmaz, Efkan Uz, Vedat Ali̇ Yürekli̇, Bumi̇n Dündar, Hasan Rifat Koyuncuoglu, Selçuk Çömlekçi̇
Turkish Journal of Medical Sciences
The effect of 50 Hz electric field (EF) on developing neural tissues is not known. We aimed to determine whether there would be any oxidative stress effect of 50 Hz EF on developing spinal cord tissues of pup rats by evaluating malondialdehyde (MDA), nitric oxide (NO) levels, and antioxidant enzyme activities such as superoxide dismutase (SOD) and catalase (CAT) measurement. Materials and methods: In the prenatal+postnatal group, the pregnant rat was exposed to continuous EF at 50 Hz 10 kV/s until delivery. Then the female pups of this group (n = 7) were exposed to EF at the same doses …
In Vitro Effect Of Resveratrol Against Oxidative Injury Of Human Coronary Artery Endothelial Cells, Oya Sayin, Nur Arslan, Zeki̇ye Sultan Altun, Gül Akdoğan
In Vitro Effect Of Resveratrol Against Oxidative Injury Of Human Coronary Artery Endothelial Cells, Oya Sayin, Nur Arslan, Zeki̇ye Sultan Altun, Gül Akdoğan
Turkish Journal of Medical Sciences
Reactive oxygen species induce oxidative stress that may contribute to endothelial dysfunction. In addition to endogen antioxidants, adding antioxidants to diet has been used to reduce oxidative-stress-induced endothelial dysfunction. Resveratrol is a natural phytoalexin which has many effects including antioxidant activity. The aim of this study was to investigate whether resveratrol could protect human coronary artery endothelial cells against in vitro oxidative-stress-mediated injury. Materials and methods: Human coronary artery endothelial cells were treated with varying concentrations of hydrogen peroxide for different durations and hydrogen peroxide plus varying concentrations of resveratrol. Then cell death was measured using lactate dehydrogenase release. Human …
Postoperative Atrial Fibrillation, Oxidative Stress, And Inflammation, Mehmet Özaydin
Postoperative Atrial Fibrillation, Oxidative Stress, And Inflammation, Mehmet Özaydin
Turkish Journal of Medical Sciences
Postoperative atrial fibrillation is the most common complication of cardiac surgery. It is associated with increased complication rates. Recent trials have suggested that inflammation and oxidative stress have key roles in the pathophysiology of atrial fibrillation. Current evidence evaluating the use of antiinflammatory and antioxidant agents, including statins, corticosteroids, N-acetylcysteine, vitamin C, and fish oil, to prevent postoperative atrial fibrillation is promising. However, larger randomized, controlled trials comparing different dose regimens are needed.
Lipid Profile Alterations And Oxidative Stress In Patients With Preeclampsia: Role Of Black Tea Extract On Disease Management, Ekambaram Padmini, Munuswamy Usha Rani
Lipid Profile Alterations And Oxidative Stress In Patients With Preeclampsia: Role Of Black Tea Extract On Disease Management, Ekambaram Padmini, Munuswamy Usha Rani
Turkish Journal of Medical Sciences
To investigate the lipid profile and susceptibility of low-density lipoprotein (LDL) to oxidation in preeclamptic women and to correlate the results with preeclampsia risk in the absence and presence of black tea extract (BTE). Preeclampsia is a disorder of human pregnancy characterized by altered endothelial function, secondary to oxidative stress. Materials and methods: Lipid profile levels and oxidative stress status were investigated in the cord blood of normotensive and preeclamptic patients. LDL susceptibility to oxidation was also monitored in the absence and presence of BTE to examine its protective role. Results: A significant alteration in lipid parameters and enhanced oxidative …
Plasma Vitamin A And E Levels In Patients With Gastroesophageal Cancer In Eastern Anatolia, Ömer Yilmaz, Hakan Dursun, Sai̇t Keleş, Ari̇f Yilmaz, Ni̇hat Okçu
Plasma Vitamin A And E Levels In Patients With Gastroesophageal Cancer In Eastern Anatolia, Ömer Yilmaz, Hakan Dursun, Sai̇t Keleş, Ari̇f Yilmaz, Ni̇hat Okçu
Turkish Journal of Medical Sciences
Gastrointestinal system (GIS) cancers account for a significant percentage of morbidity and mortality worldwide. Free radicals may play a role in the development of GIS cancers at various stages. The goal of this study was to analyze the relationship between gastroesophageal cancer and plasma levels of vitamin A and vitamin E, a significant part of antioxidant defense. Materials and methods: Twenty-six patients with gastroesophageal cancer diagnosed by endoscopy and histopathologic examination and 26 healthy volunteer subjects were included in this study. Plasma vitamin A and vitamin E levels were determined by high-performance liquid chromatography using a commercially available kit. Results: …
The Effect Of L-Tryptophan On The Heart In Rabbits Via Chronic Hypoxia, Fi̇gen Nari̇n, Nazmi̇ Nari̇n, Fatmagül Başarslan, Ali̇ Baykan, Sadetti̇n Sezer, Hülya Akgün, Aynur Akin, Mustafa Akçakuş, Hakan Ceyran
The Effect Of L-Tryptophan On The Heart In Rabbits Via Chronic Hypoxia, Fi̇gen Nari̇n, Nazmi̇ Nari̇n, Fatmagül Başarslan, Ali̇ Baykan, Sadetti̇n Sezer, Hülya Akgün, Aynur Akin, Mustafa Akçakuş, Hakan Ceyran
Turkish Journal of Medical Sciences
To evaluate the protective effect of tryptophan on an experimentally produced hypoxic myocardial injury via biochemical and pathological parameters. Materials and methods: A total of 26 rabbits were divided into 3 groups. Group 1 (n = 9) was only exposed to hypoxia. Group 2 (n = 10) was exposed to hypoxia and received L-tryptophan (200 mg/kg per day, orally for 5 days). Group 3 (n = 7) was the control group. Before the hypoxic injury and after the delivery of the medication, serum samples were taken for troponin-I, creatine kinase myocardial isoenzymes (CK-MB), lactate dehydrogenase (LDH), glutathione peroxidase (GSH-Px), superoxide …
Protective Effect Of Selenium On Intussusception-Induced Ischemia/Reperfusion Intestinal Oxidative Injury In Rats*, Hülya Akman, Sali̇h Somuncu, Günnur Di̇kmen, Şebnem Ayva, Tutku Soyer, Paki̇ze Doğan, Murat Çakmak
Protective Effect Of Selenium On Intussusception-Induced Ischemia/Reperfusion Intestinal Oxidative Injury In Rats*, Hülya Akman, Sali̇h Somuncu, Günnur Di̇kmen, Şebnem Ayva, Tutku Soyer, Paki̇ze Doğan, Murat Çakmak
Turkish Journal of Medical Sciences
To evaluate the protective effect of selenium on intestinal ischemia-reperfusion injury due to intussusception. Materials and methods: Forty Wistar albino rats were allocated to 4 equal groups (n = 10). After anesthetization, 2 cm of intestinal segment, 20 cm proximal to the ileocecal valve, was removed in the control group (CG). In the intussusception group (ING), intussusception was performed 20 cm proximal to the ileocecal valve by pushing the proximal intestinal segment distally with a stylet, and 2 cm of intestinal segment was removed 4 h later. Intussusception was reduced and a 2 cm segment was removed after another 4 …
Vitamin C Modulates Oxidative Stress-Induced Colitis In Rats, Mustafa Zeri̇n, Ali̇ Zi̇ya Karakilçik, Muharrem Bi̇ti̇ren, Davut Musa, Abdullah Özgönül, Şehabetti̇n Selek, Yaşar Nazligül, Ali̇ Uzunköy
Vitamin C Modulates Oxidative Stress-Induced Colitis In Rats, Mustafa Zeri̇n, Ali̇ Zi̇ya Karakilçik, Muharrem Bi̇ti̇ren, Davut Musa, Abdullah Özgönül, Şehabetti̇n Selek, Yaşar Nazligül, Ali̇ Uzunköy
Turkish Journal of Medical Sciences
Free radicals are an important factor in the etiopathogenesis of colitis and may increase oxidative damage. The antioxidant vitamin C efficiently scavenges free oxygen radicals. The present study aimed to investigate the probable protective effects of vitamin C on oxidative injury in rats in which colitis was experimentally induced with acetic acid. Materials and methods: This study was conducted with rats for a period of 7 days. Group 1 intrarectally received a placebo (0.9% NaCl) and group 2 intrarectally received 2 mL of 5% acetic acid (AA) and the placebo. Group 3 intrarectally received 2 mL of 5% AA and …
Evaluation Of Oxidant/Antioxidant Status And Ecp Levels In Asthma, Ömer Emecen, Berri̇n Berçi̇k İnal, Füsun Erdenen, Murat Usta, Hale Aral, Güvenç Güvenen
Evaluation Of Oxidant/Antioxidant Status And Ecp Levels In Asthma, Ömer Emecen, Berri̇n Berçi̇k İnal, Füsun Erdenen, Murat Usta, Hale Aral, Güvenç Güvenen
Turkish Journal of Medical Sciences
Inflammatory and immune cells, such as eosinophils, macrophages, and neutrophils, generate more reactive oxygen species in patients with asthma than they do in healthy individuals, and oxygen radicals contribute to tissue injury in asthma. We aimed to measure total oxidant status (TOS) and antioxidant status (TAS) in order to assess oxidative and antioxidative capacity. Eosinophil cationic protein (ECP), total IgE, and eosinophils (%) were measured to evaluate the level of inflammation. Materials and methods: The study included 56 non-smoking asthma patients that were followed-up at the respiratory disease and allergy outpatient clinics, where they received ongoing treatment for 5 months …
The Effect Of Caffeic Acid Phenethyl Ester On Bacterial Translocation And Intestinal Damage After Intestinal Obstruction, Cengi̇z Ara, Abuzer Di̇ri̇can, Seli̇m Erdoğan, Burhan Ateş, Di̇nçer Özgör, Fai̇k Tatli, M. Sai̇t Tekerekoğlu, Vedat Kirimlioğlu
The Effect Of Caffeic Acid Phenethyl Ester On Bacterial Translocation And Intestinal Damage After Intestinal Obstruction, Cengi̇z Ara, Abuzer Di̇ri̇can, Seli̇m Erdoğan, Burhan Ateş, Di̇nçer Özgör, Fai̇k Tatli, M. Sai̇t Tekerekoğlu, Vedat Kirimlioğlu
Turkish Journal of Medical Sciences
Intestinal obstruction (IO) induces bacterial translocation due to failure of the intestinal barrier function. Following bacterial overgrowth, its degradation products play a decisive role in the development of systemic septic complications. The aim of this study was to evaluate the effects of caffeic acid phenethyl ester (CAPE) on bacterial translocation and intestinal damage in an IO model in rats. Materials and methods: Complete IO was created in the distal ileum of rats by a single 4-0 silk suture. A total of 21 Wistar albino rats were randomized into 3 groups: Group 1, Sham (n = 7); Group 2, IO (n …
Measurement Of Total Antioxidant Response In Colorectal Cancer Using A Novel Automated Method, Abdullah Özgönül, Nurten Aksoy, Fuat Di̇lmec, Ali̇ Uzunköy, Şahi̇n Aksoy
Measurement Of Total Antioxidant Response In Colorectal Cancer Using A Novel Automated Method, Abdullah Özgönül, Nurten Aksoy, Fuat Di̇lmec, Ali̇ Uzunköy, Şahi̇n Aksoy
Turkish Journal of Medical Sciences
Aim: The aim of this study was to compare the antioxidative status in patients with colorectal cancer and healthy controls, based on measurements made using a novel method. Materials and Methods: The study was conducted between 2005 and 2007, and included 30 patients with colorectal cancer and 30 healthy controls. To determine the antioxidative status of the patients and healthy controls, serum total antioxidant capacity was measured using a novel automated method. Blood samples were taken from the healthy controls and the patients. Results: Total serum antioxidant capacity was significantly lower in colorectal cancer patients than in healthy persons (P < 0.023). Conclusions: Patients with colorectal cancer are exposed to oxidative stress, which may have a role in the pathogenesis of the disease. The novel automated method used in this study was developed in our laboratory, and is feasible and fully automated; therefore, it may be useful for evaluating oxidative-antioxidative balance in patients with colorectal cancer.
Total Antioxidant Capacity And C-Reactive Protein Levels In Patients With Community-Acquired Pneumonia, Ahmet Bi̇rcan, Recep Sütçü, Müni̇re Gökirmak, Hi̇cran Hi̇çyilmaz, Ahmet Akkaya, Önder Öztürk
Total Antioxidant Capacity And C-Reactive Protein Levels In Patients With Community-Acquired Pneumonia, Ahmet Bi̇rcan, Recep Sütçü, Müni̇re Gökirmak, Hi̇cran Hi̇çyilmaz, Ahmet Akkaya, Önder Öztürk
Turkish Journal of Medical Sciences
Aims: The aim of this study was to evaluate the oxidative stress measured by serum total antioxidant capacity (TAC) and malondialdehyde (MDA) in patients with community-acquired pneumonia (CAP), and to evaluate their possible correlation with the serum C-reactive protein (CRP) and pneumonia severity index (PSI). Materials and Methods: The PSI, chest X-ray (CXR) scores, and the serum TAC, MDA, and CRP levels were determined in 67 CAP patients on admission and compared to 45 healthy controls. Results: In the whole study population, the TAC level was inversely correlated with CRP levels and WBC counts (r=-0.648, P=0.0001; r=-0.626, P=0.0001, respectively). Lower …
Placental Heat Shock Protein 70 Overexpression Confers Resistance Against Oxidative Stress In Preeclampsia, Ekambaram Padmini, Bose Vijaya Geetha
Placental Heat Shock Protein 70 Overexpression Confers Resistance Against Oxidative Stress In Preeclampsia, Ekambaram Padmini, Bose Vijaya Geetha
Turkish Journal of Medical Sciences
Aims: Preeclampsia is a hypertensive disorder of human pregnancy and a leading cause of premature delivery and fetal growth retardation. The purpose of this study was to evaluate the expression of heat shock protein 70 (HSP70), both constitutive (HSC70) and induced (HSP70) forms, along with oxidative stress status in the placental tissues of normotensive (control group) and preeclamptic pregnancies. Materials and Methods: Placental samples were collected after delivery from normotensive pregnancies and preeclamptic patients (n = 20, each). Lipid peroxidation product malondialdehyde (MDA) and nitrite and nitrate levels, along with antioxidants such as superoxide dismutase (SOD) and glutathione peroxidase (GPx) …
Serum Homocysteine Levels In Highway Toll Collectors And The Relationship With Intima-Media Thickness Of The Carotid Artery, Ramazan Memi̇şoğullari, Beşi̇r Erdoğmuş, Hami̇t Hakan Alp, Cahi̇t Bi̇lgi̇n, Peri̇ Meram Arbak, Özlem Yavuz
Serum Homocysteine Levels In Highway Toll Collectors And The Relationship With Intima-Media Thickness Of The Carotid Artery, Ramazan Memi̇şoğullari, Beşi̇r Erdoğmuş, Hami̇t Hakan Alp, Cahi̇t Bi̇lgi̇n, Peri̇ Meram Arbak, Özlem Yavuz
Turkish Journal of Medical Sciences
Aim: A relationship between air pollution and increased intima-media thickness (IMT) has been recently reported, but its etiology is not yet well understood. We aimed to determine whether exposure to exhaust particles, which are important air pollutants, is associated with increased serum homocysteine (Hcy) levels and whether elevated Hcy levels are associated with increased IMT. Materials and Methods: Serum Hcy levels were measured by fluorometric high performance liquid chromatography in 65 male highway toll collectors (HTCs) and 43 healthy male volunteers. IMT was measured with Doppler sonography by an experienced radiologist. Results: Serum Hcy levels (14.5 ± 4.9 mmol/L, P < 0.005) and IMT (0.757 ± 0.18 mm, P < 0.001) were higher in the HTC group than in controls (12.0 ± 2.8 mmol/L and 0.612 ± 0.11 mm, respectively). A positive correlation was found between Hcy level and IMT both in the HTC group (r = 0.36; P < 0.005) and in the control group (r = 0.36; P < 0.05). Conclusions: Exposure to exhaust particles may cause an increase in oxidative stress because of an increase in serum Hcy levels, which consequently may lead to an increase in IMT. Nevertheless, further studies on the subject are needed before drawing a firm conclusion.
Increased Lipid Peroxidation And Decreased Antioxidant Response In Serum And Cerebrospinal Fluid In Acute Ischemic Stroke, Abdulkadi̇r Yildirim, Di̇lcan Kotan, Serap Yildirim, Recep Aygül, Fati̇h Akçay
Increased Lipid Peroxidation And Decreased Antioxidant Response In Serum And Cerebrospinal Fluid In Acute Ischemic Stroke, Abdulkadi̇r Yildirim, Di̇lcan Kotan, Serap Yildirim, Recep Aygül, Fati̇h Akçay
Turkish Journal of Medical Sciences
Background and Aim: The pathogenesis of brain damage in ischemic stroke is highly complex. The aim of the present study was to investigate the presence of oxidative stress in ischemic stroke and to determine whether the measured oxidative stress markers in serum and cerebrospinal fluid (CSF) were associated with infarction volume, and the Glasgow Coma Scale (GCS) and Glasgow Outcome Scale (GOS). Materials and Methods: The study included 32 patients with acute ischemic stroke within 48 h of onset and 18 suitable controls. Superoxide dismutase (SOD) and glutathione peroxidase (GPX) activity, glutathione (GSH) and malondialdehyde (MDA) level, and total antioxidant …
The Relation Between Low-Density Lipoprotein (Ldl) Oxidation And Hemodialysis With Respect To Membrane Types Protective Effects Of Vitamin E-Bonded Membrane, Selda Demi̇rtaş, Gökhan Nergi̇soğlu, Ayşegül Akbay Yarpuzlu, Levent Karaca
The Relation Between Low-Density Lipoprotein (Ldl) Oxidation And Hemodialysis With Respect To Membrane Types Protective Effects Of Vitamin E-Bonded Membrane, Selda Demi̇rtaş, Gökhan Nergi̇soğlu, Ayşegül Akbay Yarpuzlu, Levent Karaca
Turkish Journal of Medical Sciences
Plasma total antioxidant (TAO) levels, LDL (low density lipoprotein), antioxidant defense potential (AOP) and the resistance to oxidation of LDL fractions were studied in chronic hemodialysis patients. The differences with respect to dialyzer membrane types before and after hemodialysis were also assessed. After isolation of LDL from plasma by precipitation, AOP was measured based on the determination of TBARS (thiobarbituric acid reactive substance), and resistance to oxidation was assessed by the metal-catalyzed peroxidation of LDL followed by the determination of the values of the peroxidation product malondialdehide (MDA) before and after peroxidation. The assay principle of TAO was based on …
Relationship Between Aging And Susceptibility To Oxidative Damage: An Assessment By Erythrocyte Membrane Proteins And Lipids, Ahmet Özaydin, İlhan Onaran, Kadi̇r Avşar, Vecdet Tezcan, Gönül Sultuybek
Relationship Between Aging And Susceptibility To Oxidative Damage: An Assessment By Erythrocyte Membrane Proteins And Lipids, Ahmet Özaydin, İlhan Onaran, Kadi̇r Avşar, Vecdet Tezcan, Gönül Sultuybek
Turkish Journal of Medical Sciences
Contradictory results have been reported from various studies regarding the effect of age on susceptibility to oxidative damage. Using different parameters, we carried out a comparative study on the erythrocytes and erythrocyte membranes of healthy elderly and young adults to determine how resistance to oxidative damage is affected by aging. Thin layer chromatography and polyacrylamide gel electrophoresis under denaturing conditions were used to estimate changes in membrane phospholipids and cytoskeletal proteins, respectively. Our results showed that these components of intact erythrocytes incubated with cumene hydroperoxide (CumOOH), a powerful oxidising agent, remained unchanged in both age groups. However, exposure of erythrocyte …
Effects Of Cigarette Smoking On Blood Antioxidant Status In Short-Term And Long-Term Smokers, Hüda Di̇ken, Mustafa Kelle, Cemi̇l Tümer, Basra Deni̇z, Yüksel Baylan, Abdurrahman Şermet
Effects Of Cigarette Smoking On Blood Antioxidant Status In Short-Term And Long-Term Smokers, Hüda Di̇ken, Mustafa Kelle, Cemi̇l Tümer, Basra Deni̇z, Yüksel Baylan, Abdurrahman Şermet
Turkish Journal of Medical Sciences
To determine the effects of cigarette smoking on blood antioxidant status and lipid peroxidation, 16 healthy male current smokers (CS) and 16 healthy male non-smokers (NS) serving as controls were studied. CS were divided into two groups: short-term smokers (STS) 35.4 ± 5.8 years of age (mean±SD), and long-term smokers (LTS) 60.9 ± 4.9 years of age. The average smoking period of STS and LTS were 8.1 ± 1.1 years (mean ±SD) and 20.5 ± 4.5 years (mean ± SD)respectively. STS and LTS had their own controls, who were NS (young NS and old NS respectively). When STS and LTS …