Acute effect of phosphodiesterase type 5 inhibitor on serum oxidative status and prolidase activities in men with erectile dysfunction

OBJECTIVES: To investigate the acute effect of phosphodiesterase type 5 (PDE5) inhibitor on erectile dysfunction by evaluating serum oxidative status and prolidase activity. METHODS: Serum samples of 36 patients with erectile dysfunction and 30 control cases were analyzed for total antioxidant status, total oxidant status, and prolidase activity, before and after the administration of tadalafil citrate. RESULTS: Before and after tadalafil citrate administration, serum total antioxidant status, total oxidant status, and prolidase were 1.1+0.0 vs. 1.6 + 0.0 umol H2O2 Eq/L, 10.3+1.1 vs. 6.9 + 1.2 umol H2O2 Eq/L, and 236.4+19.5 vs. 228.2 + 19.2 U/L, respectively (

Evaluación de parámetros de estrés oxidativo y actividades metabólicas de enfermeras trabajando en turnos diurnos y nocturnos

Se objetivó evaluar estrés oxidativo y actividades metabólicas de enfermeras en turnos diurnos y nocturnos. Participaron enfermeras de Unidad de Terapia Intensiva (UTI, n=70) y del servicio común (SC, n=70). Se obtuvieron muestras sanguíneas al inicio y al final de los turnos para medir parámetros de estrés oxidativo. Las actividades metabólicas también fueron analizadas utilizando brazaletes SenseWear. Los parámetros de estrés oxidativo aumentaron hacia el final de los turnos de todas las enfermeras SC y UTI, comparados con la medida de inicio. Los niveles de TAS, TOS y OSI no eran significativamente diferentes entre enfermeras SC y UTI al cierre de los turnos diurnos y nocturnos. Las actividades metabólicas de enfermeras SC y UTI se mostraron similares. Consecuentemente, los parámetros de estrés oxidativo y las actividades metabólicas de enfermeras SC y UTI no resultaron diferentes, y todas las enfermeras sufren efectos semejantes en sus turnos, tanto diurnos como nocturnos.O objetivo deste estudo foi avaliar o estresse oxidativo e as atividades metabólicas das enfermeiras em turnos diurnos e noturnos. Enfermeiras da Unidade de Tratamento Intensivo (UTI) (n=70) e do serviço comum (SC) (n=70) participaram do estudo. Logo no início e ao final dos turnos, amostras de sangue foram obtidas para medir parâmetros de estresse oxidativo. Atividades metabólicas também foram analisadas com o uso da braçadeira SenseWear. Parâmetros de estresse oxidativo aumentaram no fim dos turnos de todas as enfermeiras SC e UTI quando comparados ao início dos turnos. Comparados às enfermeiras SC, os níveis de TAS, TOS e OSI das enfermeiras de UTI não eram significativamente diferentes no final dos turnos diurnos e noturnos. Além disso, as atividades metabólicas das enfermeiras de SC e UTI se revelaram como sendo similares. Assim, os parâmetros de estresse oxidativo e as atividades metabólicas das enfermeiras SC e UTI não eram diferentes, e todas as enfermeiras sofrem efeitos semelhantes dos turnos, tanto no dia quanto na noite.The aim of this study was to evaluate the oxidative stress and metabolic activities of nurses working day and night shifts. Intensive care unit (ICU) (n=70) and ordinary service (OS) nurses (n=70) were enrolled in the study. Just before and the end of the shifts, blood samples were obtained to measure the participants' oxidative stress parameters. Metabolic activities were analyzed using the SenseWear Armband. Oxidative stress parameters were increased at the end of the shifts for all OS and ICU nurses compared to the beginning of the shifts. Compared to the OS nurses, the ICU nurses' TAS, TOS, and OSI levels were not significantly different at the end of the day and night shifts. The metabolic activities of the OS and ICU nurses were found to be similar. As a result, the OS and ICU nurses' oxidative stress parameters and metabolic activities were not different, and all of the nurses experienced similar effects from both the day and night shifts

A nationwide multicentre study in Turkey for establishing reference intervals of haematological parameters with novel use of a panel of whole blood

IntroductionA nationwide multicentre study was conducted to establish well-defined reference intervals (RIs) of haematological parameters for the Turkish population in consideration of sources of variation in reference values (RVs). Materials and methodsK2-EDTA whole blood samples (total of 3363) were collected from 12 laboratories. Sera were also collected for measurements of iron, UIBC, TIBC, and ferritin for use in the latent abnormal values exclusion (LAVE) method. The blood samples were analysed within 2 hours in each laboratory using Cell Dyn and Ruby (Abbott), LH780 (Beckman Coulter), or XT-2000i (Sysmex). A panel of freshly prepared blood from 40 healthy volunteers was measured in common to assess any analyser-dependent bias in the measurements. The SD ratio (SDR) based on ANOVA was used to judge the need for partitioning RVs. RIs were computed by the parametric method with/without applying the LAVE method. ResultsAnalyser-dependent bias was found for basophils (Bas), MCHC, RDW and MPV from the panel test results and thus those RIs were derived for each manufacturer. RIs were determined from all volunteers’ results for WBC, neutrophils, lymphocytes, monocytes, eosinophils, MCV, MCH and platelets. Gender-specific RIs were required for RBC, haemoglobin, haematocrit, iron, UIBC and ferritin. Region-specific RIs were required for RBC, haemoglobin, haematocrit, UIBC, and TIBC. ConclusionsWith the novel use of a freshly prepared blood panel, manufacturer-specific RIs’ were derived for Bas, Bas%, MCHC, RDW and MPV. Regional differences in RIs were observed among the 7 regions of Turkey, which may be attributed to nutritional or environmental factors, including altitude

A Protective Effect of Ischemic Preconditioning on the Rat Lung Ischemia-Reperfusion Injury

Objective: To investigate the protective effect and mechanism of ischemic preconditioning (IP) on the rat lung ischemia-reperfusion injury (IRI). Methods: Forty-five specific pathogen-free SD rats were randomly divided into Sham group (n＝15), ischemia-reperfusion group (I/R group, n＝15) and IP＋IR group (n＝15). All groups were dealt differently. The pathological changes and apoptosis of the lung tissue were observed, and its water content was measured. Additionally, superoxide dismutase (SOD) activity, malondialdehyde (MDA) and endothelin-1 (ET-1) concentrations in serum and lung tissue homogenate were detected. Results: Compared with Sham group, the lung tissue lesions obviously became worse, apoptotic number, water content in the lung tissue, MDA and ET-1 concentrations in serum and lung tissue all increased significantly, while SOD activity decreased markedly in I/R group under a light microscope (P＜0.01). By comparison to I/R group, the lung tissue lesions got better, apoptotic number, water content in the lung tissue, MDA and ET-1 concentrations in serum and lung tissue all decreased significantly, while SOD activity decreased markedly in IP＋I/R group (P＜0.01). Conclusion: IP has a protective effect on IRI, and this effect may be related to activation of endogenous antioxidation, inactivation or reduction of oxygen free radicals and protection of pulmonary vascular endothelial injury

Overt and Mild Subclinical Hypothyroidism Do Not Influence Mean Platelet Volume in Premenopausal Women Having Low Cardiac Risk

Mean platelet volume (MPV) was studied in subclinical hypothyroidism (SH) and the results are conflicting. The aim of this study is to assess how MPV is affected in overt hypothyroidism (OH) and mild SH, the 2 end points of hypothyroidism, in patients having low cardiac risk. Premenopausal women without any cardiac risk, 18 with OH, 30 with mild SH, and 37 euthyroid controls were enrolled. Overt hypothyroidism group had higher low-density lipoprotein cholesterol (LDL-C) and total cholesterol levels than the control group (P < .001 and P < .05, respectively). Increase in MPV was insignificant in OH group when compared with SH and control groups. No correlation was observed between MPV and metabolic and hormonal parameters. Both OH and SH did not influence MPV and high-sensitivity C-reactive protein (hs-CRP) in patients with low cardiovascular risk, but these findings need to be further evaluated in this patient group

In vitro antioxidant activity, cyclooxygenase-2, thioredoxin reductase inhibition and DNA protection properties of Teucrium sandrasicum L.

© 2015 Elsevier B.V.The aerial parts of Teucrium sandrasicum L. (Lamiaceae), an endemic species of the Turkish flora, are widely used in the daily diet. The plant is also valued as a traditional medicine and is used for diuretic, diaphoretic, tonic, antipyretic, antidiabetic, antispasmodic, and cholagogic purposes. This study investigated a methanolic extract of aerial parts of T. sandrasicum for its antioxidant and anti-inflammatory effects, inhibition of thioredoxin reductase, and protection against DNA damage. The extract showed inhibitory activity against FeCl3/ascorbic acid induced phosphatidylcholine liposome oxidation (EC50=1.49±0.03mg/mL), quenched stable DPPH (EC50=1.05±0.03mg/mL), superoxide anion (EC50=1.20±0.06mg/mL), and ABTS cation radicals (EC50=1.73±0.01mg/mL). The extract also acted as a reductant, as determined by the FRAP value (2.66±0.21mM/L Fe2+), indicating its potential as an antioxidant. The T. sandrasicum species was determined to be a rich source of flavonoids (104.39±1.37mg/g), which are likely to serve as antioxidant, anti-inflammatory, and cancer chemoprevention agents. The extract was strongly inhibitory against both cyclooxygenase-2 (COX-2) (EC50=1.18±0.03mg/mL) and thioredoxin reductase (0.90±0.02mg/mL), and it significantly and dose-dependently decreased the amount of nicked DNA, as well as increased the natural form of DNA

Evaluation of Serum S100A8/S100A9 Levels in Patients with Autoimmune Thyroid Diseases

Background: The correlation of S100A8/S100A9 with various inflammatory conditions, including autoimmune diseases have been reported. There is no study investigating the levels of S100A8/S100A9 in autoimmune thyroid diseases (AITD) Aims: We aimed to evaluate the level of serum S100A8/S100A9 in AITD. Study Design: Case control study. Methods: Fifty patients with AITD (25 Hashimoto’s thyroiditis (HT) and 25 Graves’ disease (GD)) were included in the study. Twenty seven healthy subjects participated as a control group. Blood samples were obtained in the 3 months after the initiation of medical treatment. Serum levels of total antioxidant status (TAS), total oxidative status (TOS), total free sulfhydryl (SH), lipid hydroperoxide (LOOH) and S100A8/S100A9 were analyzed. Results: The patients with AITD had significantly higher S100A8/S100A9, OSI, LOOH and TOS levels than the healthy control group. There was no significant difference between GD and HT patients in terms of S100A8/S100A9, TOS and OSI levels. S100A8/S100A9 level was positively correlated with LOOH, TOS and OSI levels but negatively correlated with –SH level in the patients with AITD. Conclusion: Serum S100A8/S100A9 levels were increased in patients with AITD and positively correlated with LOOH, TOS and OSI whereas negatively correlated with SH

The impact of preoperative trimetazidine use on oxidative parameters in patients undergoing coronary bypass surgery

Objective: This prospective, randomised, controlled,clinical study was planned to determine the effect oftrimetazidine on myocardial ischemia-reperfusion duringon pomp coronary artery bypass graft surgery (CABG).Methods: Thirty-five patients undergoing elective CABSin our hospital between 2008 and 2009 were included.The patients were divided into two groups randomly.Seventeen patients consisted trimetazidine group andpreoperative trimetazidine PO received for two weeks,whereas 18 cases were controls. Venous blood sampleswere drawn, preoperatively, intraoperatively and postoperatively,whereas coronary sinus blood samples weredrawn before and after cardiopulmonary bypass. At theend, total oxidative status (TOS) and total antioxidant status(TAS) were studied and oxidative stress index (OSİ)was calculated. Repeated measures analysis of variancewas used to test the influence of operative stress andtrimetazidine use on oxidative parameters.Results: Trimetazidine had no impact on total oxidativestatus, total antioxidant status and oxidative stress index(p>0.05). However, repeated measurements of total oxidativestatus, total antioxidant status and oxidative stressindex have revealed significant impact of operative stresson oxidative parameters (p<0.05).Conclusion: Preoperative trimetazidine use had no impacton total oxidative status, total antioxidant status andoxidative stress index contrary to significant influence ofoperative stress on oxidative parameters.Key words: Coronary bypass surgery, trimetazidine, oxidative stres