Browsing by Publisher "Turkish Biochemistry Society"
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Item Examining acute changes in some serum biochemical markers of brain tissue damage after free and Greco-Roman style wrestling; [serbest ve grekoromen güreşi takiben beyin doku hasarını gösteren bazı serum biyokimyasal markerlerindeki akut deǧişimin i̇ncelenmesi](Turkish Biochemistry Society, 2010) Arslan F.; Büyükyazi G.; Ulman C.; Taneli F.; Gözlükaya F.; Çalkan M.Purpose: This study aimed to examine the acute changes in some serum biochemical markers due to overloading in one match of Greco-Roman and free style wrestling competitions. Method: In a repeated measures design, serum samples were collected before and 20 minutes after the first matches of the wrestlers during local wrestling competitions; subsequently analyzed for S-100B and heart-type fatty acid-binding protein. Study groups composed of Greco-Roman (n=15) and free style (n=16) wrestling groups of ≥19 year-old, healthy, male wrestlers. All matches were video-recorded for trauma analyses for each player. Results: Study results showed increments of 109% (p=.007) and 145% (p=.001) in serum S-100B; 63% (p=.023) and 198% (p=.002) in heart-type fatty acid-binding protein levels from pre to post match in the free and Greco-Roman style groups, respectively. The comparison of the increases obtained in the measured parameters did not reveal significant differences between the groups. Conclusion: Due to the significant increases in serum markers, there may be a possible additive effect of traumas in causing brain injuries/head traumas in free and Greco-Roman style wrestling. However, different style wrestling did not affect serum markers indicating brain tissue damage differently. © TurkJBiochem.com.Item Can urinary gamma glutamyl transferase be used as a bone resorption marker in postmenopausal osteoporosis?; [Üriner gamma glutamil transferaz postmenapozal osteoporozlu olgularda kemik yıkım belirteci olarak kullanılabilir mi?](Turkish Biochemistry Society, 2011) Tikiz C.; Ulman C.; Taneli F.; Acar E.Y.; Gümüşer G.; Horasan G.D.Objectives: To evaluate whether γ-glutamyl transferase can be used as a new novel bone resorption marker in postmenopusal osteoporotic subjects. Design and methods: 156 postmenopausal subjects were divided into three groups according to their lumbar spine T-score measured by dual-energy X-ray absorptiometry as normal, (control group, n=56), osteopenic (n=50) and osteoporotic (n=50). Deoxypyridinoline and γ-glutamyl transferase from urine samples and osteocalcin and bone specific alkaline phosphates from blood samples were assessed. Results: Osteocalcin and bone specific alkaline phosphates levels were increased in osteoporotic group (p<0.05). Although there is a tendency to increase in deoxypyridinoline values in osteoporotic group, this difference did not reach to a statistical significance. No significant differences were observed in urinary γ-glutamyl transferase levels between the three groups (p>0.05). No significant correlation was found between urinary γ-glutamyl transferase and deoxypyridinoline, bone specific alkaline phosphates and osteocalcin (p>0.05). Urinary γ-glutamyl transferase levels showed no significant correlation with neither bone mineral density nor T scores in all subjects (r= 0.058 p= 0.625, r=-0.074 p=0.533 respectively). Conclusions: Our primary findings did not support the suggestion that urinary γ-glutamyl transferase could be used as a potential marker for bone resorption in postmenopusal osteoporotic subjects. © 2011 TurkJBiochem.com.Item Parental attitude in women with hyperprolactinemia: A controlled cross-sectional study; [Ailesel tutumun hiperprolaktinemi üzerine etkisi: Kesitsel kontrollü bir çalışma](Turkish Biochemistry Society, 2011) Ulman C.; Aydemir O.; Taneli F.; Aksun S.; Öztin A.; Cennet S.; Laçin S.Objective: Prolactin hormone affects the brain, attitude and mood. Secretion of prolactin may be stimulated by environmental factors. The aim of this study was to demonstrate any possible effect of poor child-parent relationship on hyperprolactinemia. We hypothesize that women with hyperprolactinemia may have been subjected to poor child-parent relationship and neglect. Method: The present study was designed in a maternity hospital and included women with gynecologic complaints referred from the gynaecology outpatient clinic for serum prolactin assessments. An 85-item, self-rated EMBU Scale questionnaire (a scale for perceived parental attitude) was applied. Fifty women were enrolled over a period of 5 months. Results: Women with hyperprolactinemia (prolactin levels above 26 ng/ml) constituted the patient group (Group 1) (n=34) and those with normal serum prolactin levels (below 26 ng/ ml) served as the controls (Group 2) (n=16). The mean±SD levels of prolactin for group 1 and 2 were 57.25±38.7 ng/ml and 18.81±4.4 ng/ml, respectively. Group 1 patients believe that their parents did not show enough emotional warmth and had rejective behavior. Emotional warmth parameters of patients' mothers and fathers were significantly lower (p=0.002 and p=0.01, respectively) than those of the control group. We also found that the patients believed that their mothers and fathers both had rejective behaviors (p=0.008 and p= 0.009, respectively). Conclusion: Prolactin secretion is regulated by the dopaminergic system and since dopamine is responsible of pleasure and satisfaction sensations, the negative affection of both mothers and fathers in childhood may play a role in the etiology of chronic low-grade hyperprolactinemia in women. © TurkJBiochem.com.Item Mannose binding lectin (MBL) gene polymorphism and relationship between serum MBL concentrations in COPD patients; [KOAH hastalarında mannoz baǧlayan lektin (MBL) gen polimorfizmi ve serum MBL derişimi arasındaki ilişki](Turkish Biochemistry Society, 2012) Ulutas G.S.; Taneli F.; Alpaydin A.O.; Cetinkaya C.; Ulman C.; Guvenc Y.; Dinc G.; Coskun A.S.Aim: We aimed to assess mannose-binding lectin (MBL) gene polymorphisms and serum MBL concentrations in a sample of Turkish chronic obstructive pulmonary disease (COPD) patients as well as in cigarette smokers. Furthermore, we looked for the possible correlations of serum MBL concentrations with pulmonary function tests. Materials and methods: Forty COPD patients and 40 healthy volunteers were included. The subjects were thereafter divided into 2 groups according to smoking status. Circulating MBL concentrations were assessed by ELISA and MBL gene polymorphisms were assessed by real time PCR method. Spirometry was performed to all subjects except healthy nonsmokers. Results: In the whole study population MBL gene frequencies were found 82.5%(66/80) for A/B genotype, 15%(12/80) for D/D genotype and 2.5%(2/80) for B/B genotype. Circulating MBL concentrations were found 2103±1311 ng/ml and 2324±1001 ng/ml in smoker and nonsmoker COPD patients, respectively, whereas they were 1746±1142 ng/ml in smoker and 2040±879 ng/ml in nonsmoker controls. No statistical difference was found between the study groups for serum MBL concentrations. Serum MBL concentration correlated positively with cigarette smoking (r=0.280, p=0.030) and negatively with pulmonary functions (FEV1 (r=- 0.246, p=0.058). Conclusion: To our knowledge, no previous study has been performed in healthy Turkish population to detect the MBL gene polymorphisms. A/B genotype was the most frequent MBL variant in our study population; however serum MBL concentrations were not found compatible with MBL deficiency. We believe these results need further investigation which includes larger series to evaluate whether serum MBL concentration is a risk factor for COPD. © TurkJBiochem.com.Item Careers and research performance of PhD program graduates of health sciences in Turkey; [Türkiye'de Saǧlık Bilimleri Doktora Programlarından Mezun Olanların Kariyerleri ve Araştırma Performansları](Turkish Biochemistry Society, 2013) Cavdar Z.; Ulman C.; Kirkali G.; Baydur H.; Akdogan G.G.In this review, we aimed to evaluate PhD graduates of the period between 1985-2010 and analyze the status, motivation and positive and negative factors influencing research motivation of graduates in eight disciplines from three graduate schools of Health Sciences in Turkey and to compare with the present status in the world. Some information obtained by web-based survey is the following: The most of graduates (83%) have academic positions in basic sciences departments in the faculty of medicine in universities. 94.2 % of graduates recognized the importance of personal motivation, while 54% of them thought that finding the appropriate research environment was important for research. For 52%, the biggest hindrance to medical research was lack of funding and for 39%, lack of technic personnel for research. The studies in the literature related to PhD graduates pointed out to the following facts: The number of PhD graduates is increasing gradually and the graduates' career choices have changed from academic to non-academic positions, especially in the industry. This is not parallel to our pilot study findings. About the teaching perspective treated in the relevant literature, the concept of "one should be a good researcher, as well as a good teacher" is dominant. PhD graduates in our pilot study mentioned that they had responsibilities in the education activities during their PhD education. We think that these responsibilities are useful for their future academic career. In conclusion, the majority (83%) of graduates from Graduate Schools of Health Sciences in Turkey are enrolled into academic researcher positions in universities. They keep producing funded research work as a first author and publish despite some problems. © TurkJBiochem.com.Item Determination of some physicochemical parameteres and inorganic nutrient content of Gediz River (Manisa); [Gediz Nehri (Manisa)’nın bazı fiziko-kimyasal özellikleri ve inorganik besin içeriğinin belirlenmesi](Turkish Biochemistry Society, 2015) Şentürk T.; Yıldız Ş.Objective: This present investigation aimed at assessing the water quality of the Gediz River located in western Turkey. Methods: Some physicochemical parameters and nutrient concentrations of the surface water of Gediz River were determined over a period of twelve months (October to September 2012) at 5 sampling sites along the river. Results: Data on some ions namely NH4-N, NO2-N, NO3-N and PO-34-P were measured. The pH, temperature, electrical conductivity (EC), salinity and dissolved oxygen were also determined to assess the chemical status and pollution levels of the river. The measured data were given as mean, maximum, minimum values, respectively. In this context; the ranges for Water temperature [17.95°C±1.37ºC (30.2-4.5)], pH [7.45±0.06 (8.11-6.66)], Dissolved Oxygen [3.84±0.65 mg/L (6.25-2.43)], Electrical Conductivity (E.C) [1051.4±216.07 μS/cm (3000-296)], Salinity [0,16±0,05 ppt (0,8-0,1)], Ammonium nitrogen (NH4-N) [1.772±0.8228 mg/L (4.642-0.057)], Nitrite nitrogen (NO2-N) [0.605±0.4224 mg/L (2.312-0.050)], Nitrate nitrogen (NO3-N) [46.014±44.9878 mg/L (151.965-2.855)], Phosphate phosphorus (PO-34-P) [5.489±3.6356 mg/L (20.350-0.190)] were found to be higher than the natural background levels for surface water. Conclusion: This indicates pollution of the river water samples from the areas studied. Our findings highlighted the deterioration of water quality of the river due to anthropogenic and agriculturel activities. © 2015, Turkish Biochemistry Society. All rights reserved.Item Evaluation of scale-up parameters of bioethanol production from Escherichia coli KO11; [Escherichia coli KO11 suşundan biyoetanol üretimi için ölçek büyütme parametrelerinin değerlendirilmesi](Turkish Biochemistry Society, 2015) Deniz I.; Imamoglu E.; Sukan F.V.into fuel ethanol, as one of the cleanest liquid fuel alternatives to fossil fuels. However, industrial production of bioethanol is related with successful scaling-up studies. Methods: In this study, the experimental designs of scale-up procedures based on constant mixing time, impeller tip speed and oxygen mass transfer coefficient were performed in 8 L stirred tank reactor and were compared in terms of product yield and productivity with those obtained from 2 L stirred tank reactor using quince pomace as a substrate for bioethanol production by Escherichia coli KO11. Results: Scale-up based on constant mixing time yielded a maximum ethanol concentration of 23.42 g/L which corresponded to 0.4 g ethanol/ g reduced sugar in 8 L stirred tank reactor. Moreover, shear stress increased only 1.1 fold which resulted in low cell damage and high cell viability. Conclusion: Constant mixing time was identified as the most important key parameter especially for scaling-up of viscous fermentation broths of bioethanol production due to the significance of the homogeneity. © 2015, Turkish Biochemistry Society. All rights reserved.Item Comparative study of heavy metals and selenium accumulation in the digestive gland and gills of Mytilus galloprovincialis (Lamarck, 1819) caught in Izmir Bay (Turkey); [İzmir Körfezi’nden (Türkiye) yakalanan Mytilus galloprovincialis (Lamarck, 1819)’un sindirim bezi ve solungaçlarındaki ağır metal ve selenyum içeriklerinin karşılaştırması](Turkish Biochemistry Society, 2015) Yabanlı M.; Katalay S.; Yozukmaz A.; İnanan B.E.Objective: The aim of this study was to evaluate heavy metals (Cr, Fe, Ni, Cu, Zn, As, Cd, Hg, Pb) and selenium levels in digestive gland and gill tissues of wild Mediterranean mussel Mytilus galloprovincialis (Lamarck, 1819) collected from four locations in Izmir Bay. Methods: A total of 180 samples of the wild Mediterranean mussel M. galloprovincialis with shell length of 50-60 mm were collected from four locations. Inductively coupled plasmamass spectroscopy was used to determine heavy metals and selenium concentrations in mussel samples after microwave digestion process. Results: The highest values (mg kg-1 dry weight) obtained for digestive gland and gills were 0.17 and 0.15 for Cr, 28.62 and 29.49 for Fe, 0.25 and 0.29 for Ni, 2.53 and 1.78 for Cu, 18.52 and 22.03 for Zn, 1.26 and 1.08 for As, 0.04 and 0.04 for Cd, 0.02 and 0.02 for Hg, 0.19 and 0.16 for Pb, 0.40 and 0.48 for Se, respectively. Statistically significant differences among digestive gland and gills (p<0.05) were found for Cr, Ni, Zn, As, Se and Cd. In general, the levels of the studied elements were higher for the Karşıyaka than for other three stations. Conclusion: The low levels of toxic metals (Cd, Hg, Pb, Cr, Ni) found in tissues of M. galloprovincialis, comparing with the other studies including taken place in the Inner of Izmir Bay. M. galloprovincialis can be used as a sensitive biomonitor for the availabilities of studied elements in the Inner Bay of Izmir, Turkey. © TurkJBiochem.com.Item Comparative analysis of XTT assay and xCELLigence system by measuring cytotoxicity of resveratrol in human cancer cell lines; [İnsan kanser hücre hatlarında resveratrol sitotoksisitesinin XTT testi ve xCELLigence sistemi ile karşılaştırmalı analizi](Turkish Biochemistry Society, 2016) Atmaca H.; Bozkurt E.; Kısım A.; Uslu R.Objective: In vitro preliminary oncological and translational studies are mainly based on evaluating the cytotoxic effects of a specific compound on cultured cells. Resveratrol is a commercially available compound which is originally isolated from the roots of white hellebore and later from Polygonum cuspidatum. The objective of the study was to compare cytotoxicity data of Resveratrol from XTT end point assay with a real-time cell based xCELLigence system in terms of accuracy, sensitivity, speed and reproducibility in a panel of human cancer cell lines. Methods: XTT end point assay and real-time cell based xCELLigence system were used to evaluate cytotoxicity. Cytotoxicity results were verified by monitoring cells under phase-contrast microscope which were treated with IC50 values of resveratrol. Results: Resveratrol decreased cell viability in a timeand concentration-dependent manner in all cancer cell lines when tested by both the XTT assay and xCELLigence system. Standard deviations of the xCELLigence data were found to be lower than the data from XTT assay. Conclusion: The data from this study strongly imply that xCELLigence system has higher precision, more enlightening and more reproducible than XTT end point assay. © 2016 Turkish Biochemistry Society. All rights reserved.Item Effects of two different eight-week walking programs on insulin resistance and ER stressrelated markers in pre-menopausal women; [Premenopozal kadınlarda 8 haftalık farklı şiddetteki yürüyüş antrenmanlarının insülin direnci ve ER stresiyle ilişkili markerler üzerine etkileri](Turkish Biochemistry Society, 2016) Doğru Y.; Büyükyazı G.; Ulman C.; Taneli F.; Tıkız H.; Göral M.; Esen H.Objective: The relationship between exercise and endoplasmic reticulum (ER) stress, insulin resistance, and obesity is a new field of research. To our knowledge, there are no studies examining the effects of walking exercises on ER stress related markers and insulin resistance in pre-menopausal women. To examine the effect of two different eight-week walking programs on the tumor necrosis factor-alpha (TNF-α), Fetuin-A (α2 - Heremans Schmid glycoprotein), c-Jun N-terminal kinase-1 (JNK-1) and retinol- binding protein-4 (RBP-4), the related markers of ER stress and insulin resistance in pre-menopausal women. Methods: Exercise groups (moderate tempo walking group; MTWG; n=11; brisk walking group BWG; n=12) walked five days a week, starting from 30 minutes, gradually increasing up to 51 minutes. BWG walked at ~70–75% and MTWG at ~50–55 of HRRmax. Body mass index (BMI), body fat percentage (%), VO2max, serum TNF-α, Fetuin-A, JNK-1, RPB-4, blood lipids, and insulin resistance levels were determined before and after the intervention. Results: VO2max increased in both exercise groups favoring BWG; RBP-4 decreased in both exercise groups (p<0.05). Serum TNF-α and, TG (p<0.05), BMI and percent body fat (p<0.01), and insulin levels reduced significantly in BWG (p<0.05). The reductions observed in both exercise groups in insulin resistance, and the increases determined in the negative levels of JNK-1 in BWG may be clinically important. Conclusion: Both type of walking resulted in similar positive effects on RBP-4. The reduction observed in TNF-α, RBP-4, and the increases in the negative levels of JNK-1 in BWG show the positive effects of brisk walking on ER stress. The reduction in insulin resistance in relation to the possible reductions in ER stress and apoptosis in BWG may be more effective to prevent metabolic diseases. © 2016, Turkish Biochemistry Society. All rights reserved.Item Adsorbent effect of Chlorella vulgaris and Scenedesmus sp. (Chlorophyta) for the removal of some heavy metals and nutrients; [Bazı ağır metal ve nutrient gideriminde Chlorella vulgaris ve Scenedesmus sp. (Chlorophyta)’nin adsorbent etkisi](Turkish Biochemistry Society, 2016) Şentürk T.; Yıldız Ş.Objective: The aim of present manuscript is to evaluate the efficiency of two microalgae strains -Chlorella vulgaris and Scenedesmus sp- in removal of some inorganic nutrients and heavy metals. Methods: For this aim the green microalgae (Chlorophyta), grown in controlled laboratory conditions, were used as biosorbent for the removal of six different concentrations of Antimony (Sb3+), Manganese (Mn2+), Copper (Cu2+), Nickel (Ni2+), Phosphate (PO43-) and Nitrate (NO3-) which are prepared in aqueous solutions at conc. 0.1-1 mM for PO43-; 5-30 mM for NO3-; 2,5-100 ppm for heavy metals. Besides, the effects of heavy metals and inorganic nutrients on the cell’s total carbohydrate and chlorophyll a-b content were investigated during 24 hours exposure. Results: According to the results, the average removal efficiency of Phosphate, Nitrate, Antimony, Manganese, Copper and Nickel on C. vulgaris biomass was determined 95.91%, 21.63%, 28.64%, 49.41%, 33.38% and 29.96% while 98.15%, 14.28%, 10.05%, 8.52%, 30.18% and 20.62% on Scenedesmus sp. cells, respectively. On the other hand, the average adsorption capacities of Sb3+, Mn2+, Cu2+, Ni2+, PO43- and NO3- ions were confirmed 0.18, 0.38, 0.28, 0.15, 1.18 and 9.30 mg g-1 by C. vulgaris and 2.99, 0.96, 11.50, 11.33, 0.75 and 4.56 mg g-1 by Scenedesmus sp. biomass. Conclusion: Result of this study suggests that Chlorella vulgaris and Scenedesmus sp. have a remarkable ability on removal of excessive nutrients and heavy metals at laboratory conditions. © 2016, Turkish Biochemistry Society. All rights reserved.Item A Src/Abl kinase inhibitor, bosutinib, downregulates and inhibits PARP enzyme and sensitizes cells to the DNA damaging agents(Turkish Biochemistry Society, 2018) Kirmizibayrak P.B.; Ilhan R.; Yilmaz S.; Gunal S.; Tepedelen B.E.Background: Poly(ADP-ribosyl)ation (PARylation) catalyzed mainly by PARP1 is a highly regulated posttranslational modification associated with several pathways in cellular physiology and genotoxic deoxyribonucleic acid (DNA) damage response. PAR polymers and PARP enzyme function in DNA integrity maintenance and several PARP inhibitors have entered clinical phase studies for cancer therapies. Material and methods: The effect of bosutinib, a dual Src/ Abl kinase inhibitor, on PARylation was fluorometrically measured. The cytotoxic and chemosensitizing effects were assessed by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetra-zolium bromide (MTT) assay. The levels of DNA repair proteins and PARP enzyme were examined by immunoblotting. Results: In this study, bosutinib is characterized as a novel PARP inhibitor. Bosutinib inhibited oxidative stress-induced cellular PARylation and nuclear foci formation by downregulating PARP1 levels. Bosutinib was found to be more cytotoxic on Capan1 cells with BRCA2 mutation. Furthermore by acting as a chemosensitizer, bosutinib enhanced the cytotoxicity of doxorubicin (DOXO) and etoposide (ETP) by decreasing phosphorylation of DNA repair enzymes checkpoint kinase 1 (Chk1) and ataxia-telangiectasia mutated (ATM). Conclusion: By inhibition of both PARP and DNA damage checkpoint kinases, bosutinib increased the phospho-H2AX levels, an early indicator of DNA double strand breaks. © 2018 Turkish Biochemistry Society. All rights reserved.Item Effects of aerobic plus explosive power exercises on bone remodeling and bone mineral density in young men(Turkish Biochemistry Society, 2018) Çay V.; Buyukyazi G.; Ulman C.; Taneli F.; Doǧru Y.; Tikiz H.; Gümüşer G.; Oran A.; Keskinoǧlu P.Objectives: This study aims to examine effects of aerobic jogging and explosive power exercises on body composition, maximal oxygen consumption (MaxVO2), bone mineral density (BMD) and bone turn-over markers: serum bone alkaline phosphatase (BAP), C terminal telopeptide (CTx), Procollagen type I N-terminal propeptide (PINP), in men aged between 20 and 40. Materials and methods: Thirty seven healthy males were divided into exercise group (EG, n = 19) and control group (CG, n = 18). EG completed 10 weeks of outdoor aerobic (jogging at 60-70% maximal heart rate reserve starting from 20 min steadily increasing up to 28 min) and explosive power exercises (in 2-3 sets, with maximum repetitions lasting 15 s), 3 times per week. All measurements were taken before and after the exercise program. BMD was measured via dual energy X-ray absorptiometry (DEXA). Results: Body mass index (p < 0.001) significantly decreased; MaxVO2 (p < 0.001), femur neck (p = 0.036) and total score BMD significantly increased in EG (p = 0.034). BAP and vitamin D increased in both groups (p < 0.001). Conclusion: Performing our outdoor exercise program in spring months might have an important role in the significant increase (9 vs. 22 ng/mL) in mean vitamin D level, which reached above the fracture risk level of 20 ng/mL. © 2018 Turkish Biochemistry Society. All rights reserved.