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Full-Text Articles in Medicine and Health Sciences
Mechanisms Associated With Aging And Age-Related Disease In Drosophila, Melanie Jones
Mechanisms Associated With Aging And Age-Related Disease In Drosophila, Melanie Jones
Theses and Dissertations
Aging is an intrinsic process that is independent of obvious disease. In contrast to normal aging, age-related diseases are conditions that typically manifest at advanced ages, are associated with explicit pathology and cause disability and premature death. We used Drosophila as a model to investigate the molecular-genetic mechanisms associated with aging and age-related disease. Age-related locomotor impairment (ARLI) is a serious condition for the elderly and greatly impacts their quality of life. Toward identifying genes and mechanisms that influence ARLI, we performed a forward genetic screen using Drosophila mutants. This screen identified a loss of function mutant in PDK1, a …
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 …
O-Glcnac Transferase Modulates Jnk1 And Foxo4 Transcription Factor To Resist Acute Oxidative Stress, Shiuh-Rong Ho
O-Glcnac Transferase Modulates Jnk1 And Foxo4 Transcription Factor To Resist Acute Oxidative Stress, Shiuh-Rong Ho
All ETDs from UAB
O-GlcNAcylation is an abundant and dynamic post-translational modification on serine and threonine residues of nuclear and cytoplasmic proteins. O-GlcNAc Transferase (OGT) and Nuclear Cytoplasmic O-GlcNAcase and Acetyltransferase (NCOAT) are the only two enzymes and major regulators in this process. In the past two decades, many studies have demonstrated its important modulation roles in nutrient sensing, protein turnover, cell cycle progression, transcription, translation as well as stress resistance. Among these biological functions, the understanding of O-GlcNAcylation dependent oxidative stress is relatively unknown. This study aims to examine the effects of O-GlcNAcylation on JNK1 and FOXO4 transcription factors under acute oxidative stress …
Role Of Heme Oxygenase-1 In Acute Kidney Injury, Subhashini Bolisetty
Role Of Heme Oxygenase-1 In Acute Kidney Injury, Subhashini Bolisetty
All ETDs from UAB
Acute kidney injury (AKI), defined as the rapid loss of kidney function, is often seen in the setting of multiple organ failure in critically ill patients. Lack of established therapeutic approaches to overcome AKI has lead to unacceptably high incidence of morbidity and mortality in these patients. The molecular mechanisms that lead to AKI often have oxidative stress as a common pathogenic event. The kidney responds by prompt induction of its own anti-oxidant machinery including the highly inducible, anti-inflammatory and anti-apoptotic gene-heme oxygenase-1 (HO-1). This microsomal enzyme degrades pro-oxidant heme, which is released from heme proteins. The cytoprotective properties of …
The Effects Of Environmental Ozone Exposure On Vascular Function, Oxidative Stress, And Atherosclerosis, Gin Chuang
The Effects Of Environmental Ozone Exposure On Vascular Function, Oxidative Stress, And Atherosclerosis, Gin Chuang
All ETDs from UAB
Exposure to air pollutants are known to induce airway inflammation, decrease lung function, and worsen existing pulmonary conditions such as asthma. Additionally, air pollutant exposure has also been shown to impact cardiovascular health. Although these pollutant-induced cardiovascular effects were considered to be mediated by the direct action of pollutants upon the cardiovascular tissue and/or the indirect release of pro-inflammatory factors into the circulation, the relative contribution of the two pathways remained equivocal. Recently, several epidemiology studies associated ozone exposure with cardiovascular mortalities. However, relatively few studies to date have examined ozone in this context. In order to address our hypothesis …