Yazar "Karabulut, Ercan" seçeneğine göre listele
Listeleniyor 1 - 7 / 7
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Can copeptin predict the severity of coronavirus disease 2019 infection?(Assoc Medica Brasileira, 2021) In, Erdal; Kuluozturk, Mutlu; Telo, Selda; Toraman, Zulal Asci; Karabulut, ErcanOBJETIVE: Coronavirus disease 2019 (COVID-19) has quickly turned into a health problem globally. Early and effective predictors of disease severity are needed to improve the management of the patients affected with COVID-19. Copeptin, a 39-amino acid glycopeptide, is known as a C-terminal unit of the precursor pre-provasopressin (pre-proAVP). Activation of AVP system stimulates copeptin secretion in equimolar amounts with AVP. This study aimed to determine serum copeptin levels in the patients with COVID-19 and to examine the relationship between serum copeptin levels and the severity of the disease. METHODS: The study included 90 patients with COVID-19. The patients with COVID-19 were divided into two groups according to disease severity as mild/moderate disease (n=35) and severe disease (n=55). All basic demographic and clinical data of the patients were recorded and blood samples were collected. RESULTS: Copeptin levels were significantly higher in the patients with severe COVID-19 compared with the patients with mild/moderate COVID-19 (p<0.001). Copeptin levels were correlated with ferritin and fibrinogen levels positively (r=0.32, p=0.002 and r=0.25, p=0.019, respectively), and correlated with oxygen saturation negatively (r=-0.37, p<0.001). In the multivariate logistic regression analysis, it was revealed that copeptin (OR: 2.647, 95%CI 1.272-5.510; p=0.009) was an independent predictor of severe COVID-19 disease. A cutoff value of 7.84 ng/mL for copeptin predicted severe COVID-19 with a sensitivity of 78% and a specificity of 80% (AUC: 0.869, 95%CI 0.797-0.940; p<0.001). CONCLUSION: Copeptin could be used as a favorable prognostic biomarker while determining the disease severity in COVID-19.Öğe DOĞAL VE FERMENTE POLENİN BİYOKİMYASAL KARAKTERİZASYONU(2021) Karlıdağ, Semiramis; Akyol, Abuzer; Keskin, Merve; Keskin, Şaban; Özkök, Aslı; Karabulut, Ercan; Yılmaz, İsmetTaze arı poleni ve arı ekmeği (Perga), zengin besin içeriği nedeniyle iki önemli arı ürünüdür. Arı ekmeği, nektar ve arı salgılarıyla karıştırılan ve petek gözlerine depolanan taze polenin bir formudur. Yani arı ekmeği, doğal fermente edilmiş bir kovan ürünüdür. Tuzaklar yardımıyla çok yüksek miktarlarda taze polen toplanabilir, ancak arı ekmeği taze arı poleni kadar üretilemez. Bu nedenle arı ekmeğinin apiterapide kullanımı sınırlıdır. Bu çalışmada, probiyotik özellikleri olduğu bilinen ticari mikroorganizmalar kullanılarak üretilen arı poleni örnekleri laboratuvarda fermente edilmiştir. Taze ve fermente edilmiş arı poleninin biyokimyasal özellikleri karşılaştırılmıştır. Taze ve fermente edilmiş arı poleni için, sırasıyla; toplam fenolik içeriği 4.43±0.03 mg GAE/g ve 6.12±0.07 mg GAE/g, demir indirgeme kapasitesi 64.14±0.18 ve 72.03±0.15 µmol FeSO4.7H2O/g numune, DPPH radikal süpürme aktivitesi 9.30±0.03 ve 6.47±0.04 mg/mL, toplam protein miktarı %21.16±0.2 ve %18.70±0.3 olarak bulundu. Elde edilen verilerden fermente arı poleninin, polene göre daha yüksek toplam fenolik içeriğe ve antioksidan kapasiteye sahip olduğu görülmektedir. Bulgulara göre taze arı poleni probiyotikler kullanılarak optimum koşullarda fermente edilebilmekte ve doğal arı ekmeğine alternatif olma potansiyeline sahiptir.Öğe Efficacy of copeptin in distinguishing COVID-19 pneumonia from community-acquired pneumonia(Wiley, 2021) Kuluozturk, Mutlu; In, Erdal; Telo, Selda; Karabulut, Ercan; Geckil, Aysegul AltintopThe clinical symptoms of community-acquired pneumonia (CAP) and coronavirus disease 2019 (COVID-19)-associated pneumonia are similar. Effective predictive markers are needed to differentiate COVID-19 pneumonia from CAP in the current pandemic conditions. Copeptin, a 39-aminoacid glycopeptide, is a C-terminal part of the precursor pre-provasopressin (pre-proAVP). The activation of the AVP system stimulates copeptin secretion in equimolar amounts with AVP. This study aims to determine serum copeptin levels in patients with CAP and COVID-19 pneumonia and to analyze the power of copeptin in predicting COVID-19 pneumonia. The study consists of 98 patients with COVID-19 and 44 patients with CAP. The basic demographic and clinical data of all patients were recorded, and blood samples were collected. The receiver operating characteristic (ROC) curve was generated and the area under the ROC curve (AUC) was measured to evaluate the discriminative ability. Serum copeptin levels were significantly higher in COVID-19 patients compared to CAP patients (10.2 +/- 4.4 ng/ml and 7.1 +/- 3.1 ng/ml; p < .001). Serum copeptin levels were positively correlated with leukocyte, neutrophil, and platelet count (r = -.21, p = .012; r = -.21, p = .013; r = -.20, p = .018; respectively). The multivariable logistic regression analysis revealed that increased copeptin (odds ratio [OR] = 1.183, 95% confidence interval [CI], 1.033-1.354; p = .015) and CK-MB (OR = 1.052, 95% CI, 1.013-1.092; p = .008) levels and decreased leukocyte count (OR = 0.829, 95% CI, 0.730-0.940; p = .004) were independent predictors of COVID-19 pneumonia. A cut-off value of 6.83 ng/ml for copeptin predicted COVID-19 with a sensitivity of 78% and a specificity of 73% (AUC: 0.764% 95 Cl: 0.671-0.856, p < .001). Copeptin could be a promising and useful biomarker to be used to distinguish COVID-19 patients from CAP patients.Öğe Evaluation of second trimester plasma lipoxin A4, VEGFR-1, IL-6, and TNF-a levels in pregnant women with gestational diabetes mellitus(De Gruyter Poland Sp Z O O, 2023) Kiran, Tugba Raika; Melekoglu, Rauf; Otlu, Onder; Inceoglu, Feyza; Karabulut, Ercan; Erenler, Ayse SebnemIn this study, our objective was to explore the association between gestational diabetes mellitus (GDM) and second trimester maternal plasma levels of lipoxin A4 (LXA4), along with proinflammatory markers such as interleukin-6 (IL-6) and tumour necrosis factor alpha (TNF-a), and the anti-angiogenic factor vascular endothelial growth factor receptor 1 (VEGFR-1) in pregnant women. The study included a cohort of 30 pregnant women with GDM and a control group of 30 normoglycaemic pregnant women matched for age, body mass index, and gestational age. Plasma samples were collected and analysed by enzyme-linked immunosorbent assay to assess specific biomarkers. The GDM group had significantly lower levels of LXA4 and higher levels of TNF-a and VEGFR-1 compared to the control group (p = 0.038, p = 0.025, and p = 0.002, respectively). A statistically significant decrease in the LXA4/TNF-a ratio was observed in the GDM group (p = 0.004). The results suggest that each unit decrease in the LXA4/TNF-a ratio is associated with a 1.280-fold increase in the risk of GDM. These findings suggest a potential diagnostic role for the LXA4/TNFa ratio as a marker for women with GDM. This work provides new insights into the pathogenesis of GDM and highlights the important interplay between inflammation and metabolic dysregulation.Öğe Leukocyte albumin ratio as an early predictor of mortality in critical COVID-19 patients(Bayrakol Medical Publisher, 2022) Geckil, Aysegul Altintop; In, Erdal; Berber, Nurcan Kirici; Kasapoglu, Umut Sabri; Karabulut, Ercan; Ozdemir, CengizAim: The aim of this study is to analyze the effectiveness of the leukocyte albumin ratio (LAR) in predicting mortality in critical COVID-19 patients. Material and Methods: In this retrospectively-designed study, we evaluated a total of 98 critical patients who were hospitalized in the intensive care unit. Patients were divided into two groups according to hospital mortality as survivors (n=43) and non-survivors (n=55). Results: The non-survivors group was statistically significantly older (67.3 +/- 9.7 versus 62.5 +/- 10.9; p=0.023). HT and DM were detected more in the non-survivors group than in the survivors group (p=0.031, p=0.018, respectively). Mean LAR values were significantly higher in non-survivors than in survivors (5.9 +/- 3.5 versus 3.3 +/- 1.4; p<0.001). LAR values was positively correlated with urea (r=0.43, p<0.001), LDH (r=0.35, p<0.001), ferritin (r=0.25, p=0.015), procalcitonin (r=0.34, p<0.001), and pro-BNP (r=0.24, p=0.015) levels. A cut-off value of 3.71 ng/mL for LAR predicted mortality with a sensitivity of 76% and a specificity of 70% (AUC:0.779 95% Cl:0.689-0.870; p<0.001). Multivariable logistic regression analysis revealed that older age (OR:1.114, 95% CI:1.020-1.218; p=0.017) and increased ferritin (OR:1.003, 95% CI:1.001-1.004; p=0.002) and LAR (OR:1.583, 95% CI:1.073-2.337; p=0.021) values were independent predictors of mortality in patients with critical COVID-19. Discussion: LAR can be a useful and prognostic marker that can be used to predict mortality in COVID-19 patients admitted to the intensive care unit.Öğe Palynological, chemical, antimicrobial, and enzyme inhibition properties of Cannabis sativa L. propolis(Springer, 2023) Ozkok, Asli; Karlidag, Semiramis; Keskin, Merve; Bayram, Sinan; Keskin, Saban; Karabulut, Ercan; Cicek, FevziIn this study, both chemical characterization and biological activities of propolis samples obtained from Cannabis sativa L. (cannabis, hemp, marijuana) isolated colonies (research group) and obtained from colonies at a distance where the bee cannot fly to the isolation area (control group) were determined. Palynological analyses of propolis samples obtained from the research and control group colonies were made and the botanical origin of the cannabis plant and other plants in the research area and the plants in the control group were determined. Bioactive component analysis of propolis extracts was determined by the GC-MS technique. The inhibition effect of propolis samples on some enzymes of medical importance and their antimicrobial effects against many pathogenic microorganisms were also investigated. Palynological analyses showed that honey bees prefer cannabis plants (11.11%) when collecting propolis, and the dry matter percentage (94.6 +/- 1.8%), balsam (46.2 +/- 5.2%), and wax content (4.8 +/- 0.5%), total phenolic (26.44 +/- 1.08 mg GAE/mL) and total flavonoid (2.03 +/- 0.11 mg QE/mL) content and antioxidant capacity (88.16 +/- 2.27 mu M FeSO4 center dot 7H(2)O/mL(-1)) of the research group propolis samples containing hemp were found to be higher than the control group. Also, it was determined that the research group propolis sample contains cannabinoid derivatives (cannabidivarinic acid, 0.29%; delta (1)-tetrahydrocannabinolic acid, 0.59%; cannabidiolic acid, 0.48%), which are active compounds of the cannabis plant. Also, a high inhibition effect was detected on some enzymes of medical importance in propolis samples obtained from cannabis group colonies. In addition, the research group propolis samples also showed a high antimicrobial effect against many pathogenic microorganisms.Öğe Preventive Effects of Resveratrol against Azoxymethane Induced Damage in Rat Liver(Asian Pacific Organization Cancer Prevention, 2013) Gurocak, Simay; Karabulut, Ercan; Karadag, Nese; Ozgor, Dincer; Ozkeles, Neslihan; Karabulut, Aysun BayBackground: In recent years, due to modern lifestyles and exposure to chemical carcinogens, cancer cases are steadily increasing. From this standpoint, azoxymethane (AOM), a chemical carcinogen which causes de novo liver damage, and resveratrol, which is an antioxidant found in foods and protects against oxidative stress damage, are of interest. We here aimed to evaluate whether resveratrol could protect the liver tissues from the effects of AOM. Materials and Methods: The study was conducted in 4 groups, each consisting of seven rats, the first receiving only AOM (2 times per week, 5 mg/kg), group 2 AOM and resveratrol (2 times a week, 20 mg/kg), group 3 assessed only as a control and group 4 administered only resveratrol. At the end of the seventh week, the rats were sacrificed. Rat liver MDA, NO, GSH levels were analyzed biochemically, as well as the tissues being evaluated histopathologically. Results: MDA and NO increased in AOM group as signs of increased oxidative stress. The group concomitantly administered resveratrol was been found to be significantly decreased in MDA and NO levels and increased in GSH activity. However, there were no significant findings on histopathological evaluation. Conclusions: In the light of these results, resveratrol appears to exert protective effect on oxidative stress in the liver tissue due to deleterious effects of chemical carcinogens.
