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Full-Text Articles in Medicine and Health Sciences

Protective Effects Of Anandamide Against Cisplatin-Induced Peripheral Neuropathy Inrats, Çi̇ğdem Çengelli̇ Ünel, Başak Ayaz, Şule Aydin, Emel Ulupinar, Orhan Özati̇k, Bi̇lgi̇n Kaygisiz, Engi̇n Yildirim, Kevser Erol Jan 2021

Protective Effects Of Anandamide Against Cisplatin-Induced Peripheral Neuropathy Inrats, Çi̇ğdem Çengelli̇ Ünel, Başak Ayaz, Şule Aydin, Emel Ulupinar, Orhan Özati̇k, Bi̇lgi̇n Kaygisiz, Engi̇n Yildirim, Kevser Erol

Turkish Journal of Medical Sciences

Background/aim: Cisplatin (CIS) is an effective antineoplastic agent used in the treatment of several cancer types. Peripheral neuropathy is a major dose-limiting side-effect in CIS therapy. Cannabinoids may alleviate this painful side effect. This study investigated the analgesic effects of anandamide (AN) on CIS-induced peripheral neuropathy, in vitro effects of AN in CIS neurotoxicity, and the contribution of nitric oxide (NO) in this effect. Materials and methods: This is an experimental animal study. Primary dorsal root ganglion (DRG) cultures were prepared from oneday-old rats for in vitro investigations. DRG cells were incubated with CIS (100-300 μM), and AN (10, 50, …


Comparison Of Ischemic Preconditioning And Botulinuma Toxin Injection For The Prevention Of Ischemia-Reperfusion Injury In Musculocutaneous Flaps, Handan Derebaşinlioğlu, Anil Demi̇röz, Yağmur Aydin, Hakan Ekmekçi̇, Özlem Balci Ekmekçi̇, Övgü Aydin, Levent Cankorkmaz Jan 2020

Comparison Of Ischemic Preconditioning And Botulinuma Toxin Injection For The Prevention Of Ischemia-Reperfusion Injury In Musculocutaneous Flaps, Handan Derebaşinlioğlu, Anil Demi̇röz, Yağmur Aydin, Hakan Ekmekçi̇, Özlem Balci Ekmekçi̇, Övgü Aydin, Levent Cankorkmaz

Turkish Journal of Medical Sciences

Background/aim: The aim of the study was to evaluate the protective effect of Botulinum A toxin injection against ischemia-reperfusion injury. Materials and methods: Thirty-two Sprague-Dawley rats were divided into: control, ischemia-reperfusion, ischemic preconditioning, and botulinum groups. In all groups the musculocutaneous pedicle flap was occluded for 4 h, and then reperfused to induce ischemia- reperfusion injury. Serum and tissue myeloperoxidase (MPO) and nitric oxide (NO) levels were measured at 24 h and at 10 days. Results: Tissue MPO levels did not differ significantly between the ischemic preconditioning and botulinum groups at 24 h but was significantly lower in the botulinum …


Effects Of Whole Blood Viscosity And Plasma Nox On Cardiac Function And Cerebral Blood Flow In Children With Chronic Kidney Disease, Necla Buyan, Meltem Akçaboy, Tayfun Göktaş, Serdar Kula, Bi̇jen Nazliel, Ni̇lgün Çakar, Nermi̇n Uncu, Bülent Çeli̇k, Deni̇z Erbaş Jan 2017

Effects Of Whole Blood Viscosity And Plasma Nox On Cardiac Function And Cerebral Blood Flow In Children With Chronic Kidney Disease, Necla Buyan, Meltem Akçaboy, Tayfun Göktaş, Serdar Kula, Bi̇jen Nazliel, Ni̇lgün Çakar, Nermi̇n Uncu, Bülent Çeli̇k, Deni̇z Erbaş

Turkish Journal of Medical Sciences

Background/aim: The aim of the study was to investigate the effects of whole blood viscosity and plasma nitric oxide on cerebral and cardiovascular risks associated with chronic kidney disease. Materials and methods: The study group consisted of 40 pediatric patients and 21 healthy control subjects. Hematologic and biochemical variables, viscosity and plasma nitric oxide levels, echocardiographic findings, and middle cerebral artery blood flow velocity were examined. Results: Viscosity values of patients were significantly lower than those of the control group. Lower values of hematocrit, total protein, and albumin and higher values of ferritin in all patient groups resulted in significantly …


Levels Of Nitric Oxide, Asymmetric Dimethyl Arginine, Symmetric Dimethyl Arginine,And L-Arginine In Patients With Obsessive-Compulsive Disorder, Enver Demi̇rel Yilmaz, Mehmet Fati̇h Üstündağ, Ali̇ Görkem Gençer, Yüksel Kivrak, Özge Ünal, Mustafa Bi̇li̇ci̇ Jan 2016

Levels Of Nitric Oxide, Asymmetric Dimethyl Arginine, Symmetric Dimethyl Arginine,And L-Arginine In Patients With Obsessive-Compulsive Disorder, Enver Demi̇rel Yilmaz, Mehmet Fati̇h Üstündağ, Ali̇ Görkem Gençer, Yüksel Kivrak, Özge Ünal, Mustafa Bi̇li̇ci̇

Turkish Journal of Medical Sciences

Background/aim: We aimed to investigate and compare to healthy controls the variations in the levels of nitric oxide (NO), asymmetric dimethyl arginine (ADMA), symmetric dimethyl arginine (SDMA), and L-arginine levels in patients with obsessive-compulsive disorder (OCD). Materials and methods: We enrolled 30 patients with OCD and 30 healthy controls in the study consecutively. Diagnostic interviews of all participants were conducted with the Structured Clinical Interview for Axis I Disorders (SCID-I), and sociodemographic data of the participants were recorded. Patients scoring 10 points or more on the Yale-Brown Obsessive-Compulsive Scale were enrolled in the study. Results: The NO levels of patients …


The Effects Of Novokinin, An At2 Agonist, On Blood Pressure, Vascular Responses, And Levels Of Adma, Nadph Oxidase, And Rho Kinase In Hypertension Induced By Nos Inhibition And Salt, Emre Mutlu, Selçuk İlhan, Eli̇f Onat, Murat Kara, Engi̇n Şahna Jan 2016

The Effects Of Novokinin, An At2 Agonist, On Blood Pressure, Vascular Responses, And Levels Of Adma, Nadph Oxidase, And Rho Kinase In Hypertension Induced By Nos Inhibition And Salt, Emre Mutlu, Selçuk İlhan, Eli̇f Onat, Murat Kara, Engi̇n Şahna

Turkish Journal of Medical Sciences

Background/aim: The effects of AT2 receptor agonist novokinin on blood pressure, eNOS, NADPH oxidase, protein arginine methyltransferases (PRMTs), and Rho kinase in hypertension were investigated. Furthermore, in isolated thoracic aorta rings, contractile and dilator responses were studied. Materials and methods: To develop hypertension, L-NAME was administered intraperitoneally and salt was given with tap water (1%) for 4 weeks. Novokinin was administered intraperitoneally for the last 2 weeks. Blood pressures were measured using the tail-cuff method and enzyme levels by real-time polymerase chain reaction in aortic tissues. Results: Blood pressure increased significantly in hypertensive rats. Novokinin reduced the blood pressure in …


Effects Of Grape Seed Extract On Oxidative Stress And Antioxidant Defensemarkers In Streptozotocin-Induced Diabetic Rats, Muaz Belvi̇ranli, Hakki Gökbel, Ni̇lsel Okudan, Sadik Büyükbaş Jan 2015

Effects Of Grape Seed Extract On Oxidative Stress And Antioxidant Defensemarkers In Streptozotocin-Induced Diabetic Rats, Muaz Belvi̇ranli, Hakki Gökbel, Ni̇lsel Okudan, Sadik Büyükbaş

Turkish Journal of Medical Sciences

Background/aim: To evaluate the effects of grape seed extract (GSE) supplementation on oxidative stress and antioxidant markers in streptozotocin (STZ)-induced diabetic rats. Materials and methods: Thirty-six male rats were divided into the following four groups: control, GSE-supplemented control, diabetic, and GSE-supplemented diabetic. Beginning on day 7 after STZ injection, the rats were administered GSE (100 mg kg-1 day-1) in drinking water for 6 weeks. At the end of week 6, rats were sacrificed by cardiac puncture. Plasma nitric oxide (NO) levels and xanthine oxidase (XO), adenosine deaminase (ADA), and glutathione peroxidase (GPx) activities were analyzed. Results: Both XO and ADA …


Malondialdehyde And Nitric Oxide Levels And Catalase, Superoxide Dismutase, And Glutathione Peroxidase Levels In Maternal Blood During Different Trimesters Ofpregnancy And In The Cord Blood Of Newborns, Sevda Yüksel, Ayşe Arzu Yi̇ği̇t Jan 2015

Malondialdehyde And Nitric Oxide Levels And Catalase, Superoxide Dismutase, And Glutathione Peroxidase Levels In Maternal Blood During Different Trimesters Ofpregnancy And In The Cord Blood Of Newborns, Sevda Yüksel, Ayşe Arzu Yi̇ği̇t

Turkish Journal of Medical Sciences

Background/aim: To determine whether levels of malondialdehyde (MDA), nitric oxide (NO), superoxide dismutase (SOD), glutathione peroxidase (GPx), and catalase (CAT) change during the 3 trimesters of pregnancy, and to compare the third trimester of pregnancy with newborn cord blood in respect to the levels of MDA, NO, and antioxidant enzymes. Materials and methods: Maternal blood samples were collected at 9?13, 22?26, and 36?40 weeks of gestation. Cord blood was collected at the time of delivery. Results: NO levels and GPx activity were higher in the second and third trimesters than in the first trimester. MDA level was lower in the …


Expression Of Nadph-D In The Vagal Nuclei Of The Chronic Esophagitis Model In Rats, Ümi̇t Süleyman Şehi̇rli̇, Hali̇l Tuğtepe, Ural Veri̇mli̇, Özlem Ki̇razli, Mazhar Özkan, Emrullah Tolga Dağli Jan 2014

Expression Of Nadph-D In The Vagal Nuclei Of The Chronic Esophagitis Model In Rats, Ümi̇t Süleyman Şehi̇rli̇, Hali̇l Tuğtepe, Ural Veri̇mli̇, Özlem Ki̇razli, Mazhar Özkan, Emrullah Tolga Dağli

Turkish Journal of Medical Sciences

To evaluate the changes in the number of NADPH diaphorase (NADPH-d) stained neurons in the vagal nuclei in a chronic esophagitis model. Materials and methods: There were 3 groups of rats examined: 1) a chronic gastroesophageal reflux rat group, which was created by a partial gastric outlet obstruction; 2) a sham group; and 3) a ranitidine treated group. Serial sections of brainstems of all groups were cut and NADPH-d staining, which selectively stains the nitric acid synthase-containing neurons, was done. Results: Histopathological changes due to chronic reflux esophagitis was observed in the reflux group. The ranitidine treatment and sham control …


Endothelial Dysfunction And Insulin Resistance In Young Women With Polycystic Ovarian Syndrome, Mi̇ne Yavuz Taşlipinar, Nedret Kiliç, Ni̇lüfer Bayraktar, İsmai̇l Güler, Yasemi̇n Gülcan Kurt, Tayfun Göktaş, Mehmet Zeki̇ Taner, Mehmet Özdemi̇r Hi̇mmetoğlu, Hali̇l Yaman, Abdullah Taşlipinar Jan 2014

Endothelial Dysfunction And Insulin Resistance In Young Women With Polycystic Ovarian Syndrome, Mi̇ne Yavuz Taşlipinar, Nedret Kiliç, Ni̇lüfer Bayraktar, İsmai̇l Güler, Yasemi̇n Gülcan Kurt, Tayfun Göktaş, Mehmet Zeki̇ Taner, Mehmet Özdemi̇r Hi̇mmetoğlu, Hali̇l Yaman, Abdullah Taşlipinar

Turkish Journal of Medical Sciences

To evaluate whether there is a correlation between insulin resistance and nitric oxide-related endothelial dysfunction in patients with polycystic ovarian syndrome (PCOS). Materials and methods: The study was conducted with 25 young women with PCOS and 25 young healthy women, between 18 and 35 years of age. Plasma asymmetric dimethylarginine (ADMA) levels, serum nitric oxide (NO) levels, and homeostatic model assessment of insulin resistance (HOMA-IR) rates were measured in both the patient and control groups. Results: Plasma ADMA levels were significantly higher in PCOS patients than in the controls (P = 0.001). Serum NO levels were significantly lower in patients …


Investigation Of The Protective Effects Of L-Carnitine And L-Arginine On Cardiovascular Changes Induced By Acth And Dexamethasone In Rabbits, Bi̇rkan Topçu, Metehan Uzun Jan 2013

Investigation Of The Protective Effects Of L-Carnitine And L-Arginine On Cardiovascular Changes Induced By Acth And Dexamethasone In Rabbits, Bi̇rkan Topçu, Metehan Uzun

Turkish Journal of Medical Sciences

To determine the protective effects of L-carnitine on cardiovascular changes that may occur in rabbits treated with adrenocorticotropic hormone (ACTH) and dexamethasone (DEX). Materials and methods: Rabbits of equal weight were divided into 7 groups with 6 animals in each. Blood samples were collected from all groups on days 1, 7, and 14, and blood pressure values and ECG monitoring were recorded. Nitric oxide (NO), creatine kinase MB (CK-MB), and troponin I (TnI) levels were determined in blood samples. Heart rate, QT, and corrected QT (QTc) values were calculated from ECG records. Results: The QT and QTc times were prolonged …


The Effects Of Formaldehyde Intoxication On The Inducible Nitric Oxide Synthase Expression And Nitric Oxide Level In The Liver Tissue Of Rats, Ergün Uçmakli, Ferah Armutcu, Alaatti̇n Öztürk Jan 2013

The Effects Of Formaldehyde Intoxication On The Inducible Nitric Oxide Synthase Expression And Nitric Oxide Level In The Liver Tissue Of Rats, Ergün Uçmakli, Ferah Armutcu, Alaatti̇n Öztürk

Turkish Journal of Medical Sciences

To investigate inductive activity of formaldehyde (FA) on the expression of inducible nitric oxide synthase (iNOS) and level of nitric oxide (NO) in the liver of rats. Materials and methods: Sixteen male Wistar albino rats of the same age (3 months old) were divided into 2 experimental groups, with 8 rats as the control and 8 rats formaldehyde-treated (FAt). The FAt group received intraperitoneal injection of 10 mg/kg FA for 10 days. Activity of iNOS was shown with immunohistochemical stain kits, and the concentration of NO level was measured by spectrophotometric method in the liver tissue. Results: The FAt group …


Effects Of Two Different Doses Of Acetylsalicylic Acid On Serum Nitric Oxide, Asymmetric Dimethylarginine, And Homocysteine Levels In Healthy Volunteers*, İdri̇s Mehmetoğlu, Sevi̇l Kurban Jan 2012

Effects Of Two Different Doses Of Acetylsalicylic Acid On Serum Nitric Oxide, Asymmetric Dimethylarginine, And Homocysteine Levels In Healthy Volunteers*, İdri̇s Mehmetoğlu, Sevi̇l Kurban

Turkish Journal of Medical Sciences

To examine the effects of ASA on serum nitric oxide (NO), asymmetric dimethylarginine (ADMA), and homocysteine levels in healthy volunteers. Materials and methods: Totally, 26 apparently healthy volunteers were enrolled in the study. Of the participants, 13 (5F, 8M) received 100 mg of ASA daily and 13 (5F, 8M) received 150 mg of ASA daily for 2 months. Serum NO, ADMA, and homocysteine levels were measured before and 1 and 2 months after ASA treatment Serum NO, ADMA, and homocysteine levels were measured before and 1 and 2 months after ASA treatment. Results: ADMA levels of the group receiving 150 …


Serum Nitric Oxide, Asymmetric Dimethylarginine, And Plasma Homocysteine Levels In Active Behçet's Disease, Murat Aydin, Cemi̇le Koca, Sema Uysal, Yüksel Totan, Ramazan Yağci, Ferah Armutcu, Zübeyde Cücen, Muhammet Ramazan Yi̇ği̇toğlu Jan 2012

Serum Nitric Oxide, Asymmetric Dimethylarginine, And Plasma Homocysteine Levels In Active Behçet's Disease, Murat Aydin, Cemi̇le Koca, Sema Uysal, Yüksel Totan, Ramazan Yağci, Ferah Armutcu, Zübeyde Cücen, Muhammet Ramazan Yi̇ği̇toğlu

Turkish Journal of Medical Sciences

Behçet's disease is a relapsing vasculitis characterized by endothelial dysfunction. This study was conducted to determine the levels of nitric oxide (NO) and 2 related parameters, asymmetric dimethylarginine (ADMA) and homocysteine levels, in relation to the pathogenesis of Behçet's disease. Materials and methods: A total of 49 Behçet's patients, comprising 26 patients with the active disease and 23 patients with the inactive disease, and a healthy control group of 24 individuals participated in this study. International Study Group Diagnostic Criteria were followed in the diagnosis of Behçet's disease; patients who had at least 2 signs were considered as having the …


The Evaluation Of Plasma Arginine, Arginase, And Nitric Oxide Levels In Patients With Esophageal Cancer, İbrahi̇m Kaplan, Yener Aydin, Yusuf Bi̇len, Fatma Genç, Mevlüt Sai̇t Keleş, Ati̇la Eroğlu Jan 2012

The Evaluation Of Plasma Arginine, Arginase, And Nitric Oxide Levels In Patients With Esophageal Cancer, İbrahi̇m Kaplan, Yener Aydin, Yusuf Bi̇len, Fatma Genç, Mevlüt Sai̇t Keleş, Ati̇la Eroğlu

Turkish Journal of Medical Sciences

Many studies have been conducted to investigate plasma arginine, arginase, and nitric oxide (NO) levels in patients with different types of cancer, and it has been suggested that these might be important factors for patients with cancer. In the present study, plasma arginine, arginase, and nitric oxide levels were evaluated in patients with esophageal cancer. Materials and methods: A total of 100 patients (51 females and 49 males) diagnosed with esophageal cancer but not yet operated on were included in the study. The mean age of the study population was 62.03 ± 12.4 years. Patients treated with radiotherapy or chemotherapy …


The Effect Of Caffeine On Oxidative Stress In Liver And Heart Tissues Of Rats, Hati̇ce Paşaoğlu, Fatma Ebru Ofluoğlu Demi̇r, Canan Yilmaz-Demi̇rtaş, Ahmed Hussein, Özge Tuğçe Paşaoğlu Jan 2011

The Effect Of Caffeine On Oxidative Stress In Liver And Heart Tissues Of Rats, Hati̇ce Paşaoğlu, Fatma Ebru Ofluoğlu Demi̇r, Canan Yilmaz-Demi̇rtaş, Ahmed Hussein, Özge Tuğçe Paşaoğlu

Turkish Journal of Medical Sciences

To investigate the effect of caffeine on the levels of malondialdehyde (MDA), nitric oxide (NO), and advanced oxidation protein products (AOPP) in the liver and heart tissues of rats. Materials and methods: The current study included 30 rats, which were divided into 3 groups: a control group and 2 caffeine-treated groups. Group 1 was given caffeine at 30 mg/kg and Group 2 was given caffeine at 100 mg/kg (a high nontoxic dose) for 14 days. Results: MDA and AOPP levels in the liver tissue of the caffeine-treated groups decreased significantly as a result of the dose. MDA and AOPP levels …


The Levels Of Nitric Oxide And Metabolites In Behçet's Disease, İbrahi̇m Kökçam, Selma Bakar Dertli̇oğlu Jan 2011

The Levels Of Nitric Oxide And Metabolites In Behçet's Disease, İbrahi̇m Kökçam, Selma Bakar Dertli̇oğlu

Turkish Journal of Medical Sciences

Endothelial damage and dysfunction are held responsible for the etiopathogenesis of Behçet's disease (BD). In the present study, we aimed to investigate the relationship of BD with nitric oxide (NO), asymmetrical dimethylarginine (ADMA), symmetrical dimethylarginine (SDMA) and L-arginine levels, which are known to play a role in the pathogenesis of vasculitis. Materials and methods: Sixty patients enrolled in the study were allocated to groups as follows: active/inactive patient groups; the patient group with active/inactive vessel involvement, and mucocutaneous patient group without vessel involvement. Results: NO, SDMA, ADMA levels of the active patients and SDMA and ADMA levels of the inactive …


Immunohistochemical Evaluation Of The Effects Of Nebivolol On Intimal Hyperplasia Following Endothelial Injury, İlker Akar, Ali̇ Rahman, M. Cengi̇z Çolak, Bi̇lal Üstündağ, İbrahi̇m Hani̇fi̇ Özercan, Ayhan Uysal Jan 2011

Immunohistochemical Evaluation Of The Effects Of Nebivolol On Intimal Hyperplasia Following Endothelial Injury, İlker Akar, Ali̇ Rahman, M. Cengi̇z Çolak, Bi̇lal Üstündağ, İbrahi̇m Hani̇fi̇ Özercan, Ayhan Uysal

Turkish Journal of Medical Sciences

Intimal hyperplasia is a vascular remodeling process. It is a clinical problem that forms in the vascular wall as a result of smooth muscle cell migration, proliferation, and extracellular matrix accumulation. In this study we examined the immunohistochemical evaluation of the effects of nebivolol on intimal hyperplasia in damaged endothelial tissue. Materials and methods: The study was conducted using 21 rabbits equally divided into 3 groups: control, solvent, and nebivolol. The rabbits in the control group only underwent balloon injury of the abdominal aorta. The rabbits in the solvent group and nebivolol group underwent balloon injury and were treated with …


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 Jan 2011

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 …


Serum Nitric Oxide And Peroxynitrite Levels In Adult Sero-Positive Rheumatoid Arthritis Treated With Disease Modifying Antirheumatic Drugs: A Preliminary Report, Marwan S.M. Al-Nimer, Samir Abdul-Hassan Al-Obaidi, Khalid S. Al-Dulaimi Jan 2010

Serum Nitric Oxide And Peroxynitrite Levels In Adult Sero-Positive Rheumatoid Arthritis Treated With Disease Modifying Antirheumatic Drugs: A Preliminary Report, Marwan S.M. Al-Nimer, Samir Abdul-Hassan Al-Obaidi, Khalid S. Al-Dulaimi

Turkish Journal of Medical Sciences

The contribution of inducible nitric oxide synthase (iNOS) to oxidative/nitrative stress is well documented in inflamed joints. Nitric oxide stimulates the synthesis of proinflammatory mediators and cytotoxic molecules with a pivotal role in apoptosis at the joint of rheumatoid arthritis. This study aimed to assess the serum levels of nitric oxide and peroxynitrite in sero positive rheumatoid patients treated with disease modifying antirheumatic drugs. Materials and methods: Sixteen known patients with sero-positive rheumatoid arthritis fulfilling the criteria of the American College of Rheumatology and on disease modifying antirheumatic drugs were allocated from the consultant clinic of rheumatology at Al-Yarmouk Teaching …


The Effects Of Nitric Oxide On Rat Stomach Injury Induced By Acetylsalicylic Acid, Murat Yağmurca, Muharrem Uçar, Ersi̇n Fadillioğlu, Hasan Erdoğan, Feral Öztürk Jan 2009

The Effects Of Nitric Oxide On Rat Stomach Injury Induced By Acetylsalicylic Acid, Murat Yağmurca, Muharrem Uçar, Ersi̇n Fadillioğlu, Hasan Erdoğan, Feral Öztürk

Turkish Journal of Medical Sciences

Aim: Acetylsalicylic acid (ASA, aspirin), which is one of the most frequently used drugs in the world, causes severe gastric mucosal injury. Nitric oxide (NO) is synthesized from L-arginine by nitric oxide synthase (NOS). NOS can be inhibited by Nω-nitro-L-arginine methyl ester (L-NAME) and stimulated by supplementing the diet with L-arginine (L-Arg). The aim of this study was to investigate the role of NO on gastric mucosal injury induced by ASA. Materials and Methods: Male Sprague-Dawley rats were divided into seven groups: control, ASA, ASA+L-NAME, ASA+L-Arg, ASA+L-Arg+L-NAME, only L-NAME, and only L-Arg groups. After administration of the drugs, the rats …


Acute Effect Of Speed Exercise On Nitric Oxide (No) Level Of Footballers, Özcan Saygin Jan 2009

Acute Effect Of Speed Exercise On Nitric Oxide (No) Level Of Footballers, Özcan Saygin

Turkish Journal of Medical Sciences

Aim: Exercise is one of the low-cost and easiest ways for improving life standards and physical fitness, and reducing body stress. Nitric oxide (NO) is defined as the ''surprising soldier mediator'' of biological systems. NO is one of the relaxation factors coming from the vascular endothelium. This relaxation in smooth muscles leads to vasodilatation in veins. The purpose of this study is to evaluate the acute effect of 20-meter sprints of footballers on NO levels. Materials and Methods: 22 footballers with an age range of 18-32 were voluntarily enrolled in the study. The heights and weights of the subjects were …


The Effect Of Dust-Mites On Nitric Oxide Production, Süleyman Yazar, Eser Kiliç, Meti̇n Atambay, Aysun Bay Karabulut, Özlem Makbule Aycan, Gülden Sönmez Tamer, Ni̇lgün Daldal Jan 2009

The Effect Of Dust-Mites On Nitric Oxide Production, Süleyman Yazar, Eser Kiliç, Meti̇n Atambay, Aysun Bay Karabulut, Özlem Makbule Aycan, Gülden Sönmez Tamer, Ni̇lgün Daldal

Turkish Journal of Medical Sciences

Aim: We aimed to investigate the effect of house dust mite on the level of nitric oxide in patients who had dust mite in their houses and suffering from rhinitis and/or asthma and/or eczema-like allergic symptoms and were positive for skin tests (Prick). Materials and Methods: The effect of dust-mites on nitric oxide concentration was investigated using Griess method in patients who had allergic symptoms and were positive for skin tests. Results: The plasma nitric oxide level was found to be statistically higher in patients who had dust mite in their houses and suffering from allergic symptoms and were positive …


The Effect Of Alcohol On Total Antioxidant Activity And Nitric Oxide Levels In The Sera And Brains Of Rats, Sevi̇l Kurban, İdri̇s Mehmetoğlu Jan 2008

The Effect Of Alcohol On Total Antioxidant Activity And Nitric Oxide Levels In The Sera And Brains Of Rats, Sevi̇l Kurban, İdri̇s Mehmetoğlu

Turkish Journal of Medical Sciences

Background: The present study investigated the effect of alcohol consumption on total antioxidant activity (AOA) and nitric oxide (NO) levels in the sera and brains of rats. Materials and methods: The study included 24 rats that were divided into 2 groups: the control group (n = 12) and the alcohol group (n = 12). Both groups were fed regular laboratory chow and tap water for a period of 2 months; however, the alcohol group received 15% (v/v) ethanol in their drinking water. Then, the rats were decapitated, and serum and brain AOA and NO levels were measured. Results: Both serum …


Interleukin-6 And Nitric Oxide Levels In Neonatal Sepsis, Anil Aktaş Tapisiz, Ebru Ergenekon, Deni̇z Erbaş, Murat Öktem, Ni̇hal Demi̇rel, Kivilcim Gücüyener, Canan Türkyilmaz, Esra Önal, Yildiz Atalay Jan 2007

Interleukin-6 And Nitric Oxide Levels In Neonatal Sepsis, Anil Aktaş Tapisiz, Ebru Ergenekon, Deni̇z Erbaş, Murat Öktem, Ni̇hal Demi̇rel, Kivilcim Gücüyener, Canan Türkyilmaz, Esra Önal, Yildiz Atalay

Turkish Journal of Medical Sciences

Aim: The objectives of this study were to compare interleukin-6 (IL-6) and nitric oxide (NO) levels in newborns with culture-proven sepsis with levels in age- and gestational age (GA)-matched controls, and to investigate the correlation between mediator levels and circulatory functions in the septic group. Materials and Methods: Samples for IL-6 and NO levels were obtained from newborns with blood culture-proven sepsis before the beginning of antibiotic therapy and on the 3rd day of treatment. Heart rate, blood pressure and other treatment modalities including inotropic support were also recorded. Age- and GA-matched newborns without infection were included as controls. Minitab …


Histological Changes In The Rat Thoracic Aorta After Chronic Nitric Oxide Synthase Inhibition, Ni̇gar Vardi, Feral Öztürk, Ersi̇n Fadillioğlu, Ali̇ Otlu, Murat Yağmurca Jan 2003

Histological Changes In The Rat Thoracic Aorta After Chronic Nitric Oxide Synthase Inhibition, Ni̇gar Vardi, Feral Öztürk, Ersi̇n Fadillioğlu, Ali̇ Otlu, Murat Yağmurca

Turkish Journal of Medical Sciences

The objective of this study was to determine the morphological effects of chronic nitric oxide (NO) inhibition on the thoracic aorta of Wistar rats. Fifteen male Wistar Albino rats were divided into three groups. Group I rats (control group, n = 5) received tap water, group II rats (n = 5) recieved 100 mg/kg L-NAME (moderate NO inhibiton) and group III rats (n = 5) received 500 mg/kg L-NAME, in drinking water (severe NO inhibition) for 15 days. At the end of 15 days, the carotid arteries of the rats were cannulated and their blood pressure was measured. The rats …


Lipid Peroxidation, Nitrate And Nitrite Levels In Eclamptic And Intrauterine Growth Retarded Pregnancies, Hati̇ce Paşaoğlu, Nesli̇han Bukan, Gülsen Bulduk, Şevki̇ Çelen Jan 2003

Lipid Peroxidation, Nitrate And Nitrite Levels In Eclamptic And Intrauterine Growth Retarded Pregnancies, Hati̇ce Paşaoğlu, Nesli̇han Bukan, Gülsen Bulduk, Şevki̇ Çelen

Turkish Journal of Medical Sciences

In this study we investigated nitric oxide metabolites nitrate+nitrite and lipid peroxidation product (malonyldialdehyde: MDA) related to the pathogenesis of eclampsia and intrauterine growth retarded (IUGR) pregnancy. Plasma nitrate+nitrite levels were higher in the eclamptic (31.6 ± 16.7 µmol/L p < 0.001) and IUGR (24.3 ± 9.5 µmol/L p < 0.005) groups than in the control group (18.8 ± 6.9 µmol /L). Plasma MDA levels were higher in the eclamptic group (5.5 ± 2.5 nmol/ml (p < 0.05) but not significantly different in the IUGR (3.4 ± 2.4 nmol/ml p > 0.05) group than control group (3.0 ± 1.3 nmol/ml). In addition, the plasma nitrite+nitrate and MDA levels in the eclamptic group were higher than in the IUGR group (p < 0.05). These variations could play different roles in the pathogenesis of eclampsia and IUGR pregnancy.


The Relation Of Cerebrospinal Fluid Nitric Oxide Levels To Prognosis And Differential Diagnosis Of Meningitis, Kasim Çeti̇n, Serpi̇l Erol, Hülya Aksoy, Mehmet Akin Taşyaran Jan 2002

The Relation Of Cerebrospinal Fluid Nitric Oxide Levels To Prognosis And Differential Diagnosis Of Meningitis, Kasim Çeti̇n, Serpi̇l Erol, Hülya Aksoy, Mehmet Akin Taşyaran

Turkish Journal of Medical Sciences

This study was designed to investigate the role of nitric oxide (NO) in the differential diagnosis of bacterial, tuberculous and viral meningitis, and the relation between cerebrospinal fluid (CSF) NO levels and meningitis prognosis. Twenty patients with bacterial meningitis, 9 with tuberculous meningitis, 11 with viral meningitis/meningoencephalitis and 21 control patients were included in the study. CSF NO levels were investigated by measuring the levels of nitrite with a colorimetric test. Mean CSF nitrite levels were 3.9 ± 2.0 µmol/l in bacterial meningitis, 2.7 ± 1.9 µmol/l in tuberculous meningitis, 1.9 ± 1.7 µmol/l in viral meningitis/meningoencephalitis and 1.4 ± …


Protective Effect Of Nitric Oxide In Lung Injury Associated With Cerulein-Induced Acute Pancreatitis, Abdulkadi̇r Bedi̇rli̇, Erdoğan M. Sözüer, Recep Saraymen, Nai̇l Ersöz, Eser Kiliç Jan 2002

Protective Effect Of Nitric Oxide In Lung Injury Associated With Cerulein-Induced Acute Pancreatitis, Abdulkadi̇r Bedi̇rli̇, Erdoğan M. Sözüer, Recep Saraymen, Nai̇l Ersöz, Eser Kiliç

Turkish Journal of Medical Sciences

The aim of this study was to investigate the role of NO in the pathogenesis of lung injury associated with pancreatitis, and the relation between malondialdehyde (MDA) and myeloperoxidase (MPO). Forty Wistar male rats were divided into control or pancreatitis groups, and treated with saline, L-arginine (100 mg/kg i.v.), NO donor, or N-nitro-L-arginine methyl ester (L-NAME) (10 mg/kg i.v.), an inhibitor of NO synthase. Pancreatitis was induced in rats intravenously via the administration of cerulein (10 µg/kg/h) for 4 h). Eight hours after the induction of acute pancreatitis (AP), amylase and lipase in plasma significantly increased in all animals in …


Nitric Oxide I: Advances In The Measurements For Clinical Applications, Ayşe Baysal Jan 2001

Nitric Oxide I: Advances In The Measurements For Clinical Applications, Ayşe Baysal

Turkish Journal of Medical Sciences

Nitric oxide (NO) is a colorless gas with high affinity to ferrous hemoproteins. This simple molecule is a powerful messenger in the body. This study reviews a literature search using keywords and abstracts in English through Medline. Recent advances in the therapeutic uses of inhaled nitric oxide in lung diseases and other pathologic states urges the efficient and convenient use of nitric oxide in hospital practice. In addition, methods of inhaled nitric oxide delivery, chemiluminescence and electrochemical analyzers were reviewed. The performance characteristics of different equipment were compared. The novel methods of nitric oxide measurements that utilize simple and cheaper …


Nitric Oxide In Chronic Liver Disease, Güldal Kirkali, Semra Gezer, Nurcan Umur, Mehmet Ali̇ Özcan, Ethem Tankurt Jan 2000

Nitric Oxide In Chronic Liver Disease, Güldal Kirkali, Semra Gezer, Nurcan Umur, Mehmet Ali̇ Özcan, Ethem Tankurt

Turkish Journal of Medical Sciences

The formation of nitric oxide (NO), a free radical, increases in liver disease, where the L-arginine-nitric oxide (L- arg-NO) pathway is activated by the increased levels of cytokines and endotoxins. In this study, we investigated the relationship between the L-arg-NO pathway and chronic active hepatitis and cirrhosis, which are classified as chronic liver disease. We determined the serum levels of nitrite and nitrate, the end products of the L-arg-NO pathway, in patients with chronic liver disease and compared them with the control group levels. Total nitrite produced by the reduction of nitrate to nitrite in the presence of nitrate reductase …