Araştırma Çıktıları

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    Hypoxia Aggravates Inhibition of Alveolar Epithelial Na-Transport by Lipopolysaccharide-Stimulation of Alveolar Macrophages
    (MDPI, 2022-01-01) Baloglu, Emel; Velineni, Kalpana; Ermis-Kaya, Ezgi; Mairbaeurl, Heimo
    Inflammation and hypoxia impair alveolar barrier tightness, inhibit Na- and fluid reabsorption, and cause edema. We tested whether stimulated alveolar macrophages affect alveolar Na-transport and whether hypoxia aggravates the effects of inflammation, and tested for involved signaling pathways. Primary rat alveolar type II cells (rA2) were co-cultured with rat alveolar macrophages (NR8383) or treated with NR8383-conditioned media after stimulation with lipopolysaccharide (LPS
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    The Evaluation of Endothelin-1 and Endothelin Receptor Type A Gene Polymorphisms in Patients with Vitiligo
    (WOLTERS KLUWER MEDKNOW PUBLICATIONS, 2016-01-01) Bingul, Ilknur; Aydingoz, Ikbal Esen; Vural, Pervin; Dogru-Abbasoglu, Semra; Uysal, Mujdat
    Background: Endothelin-1 (EDNi) and EDN receptor type A (EDNRA) are implicated in melanocyte functions. Aim and Objectives: This study examines the role of EDN1 (G5665T and T-1370G) and EDNRA (C + 70G and G-231A) polymorphisms as a risk factor for vitiligo, and evaluates the relationship between genotypes and clinical characteristics of vitiligo patients. Materials and Methods: We analyzed genotype/alele distributions of EDN1 and EDNRA polymorphisms in 100 patients with vitiligo and 185 healthy controls by real-time polymerase chain reaction. Results: There was no notable risk for vitiligo afflicted by studied polymorphisms. However, the presence of EDNRA + 70 variant G allele was found to be related with decreased risk for development of generalized type of vitiligo (odds ratio {[}OR]: 0.42, 95\% confidence interval {[}CI] = 0.21-0.86, Por = 0.03) and showed protective effect against associated diseases seen in vitiligo (OR: 0.49, 95\% CI = 0.27-0.88, p(corr) = 0.034). Haplotype analysis demonstrated a strong (disequilibrium coefficient = 0.73, r(2) = 0.405) linkage disequilibrium between EDN1 G5665T and T-1370G polymorphisms. The EDN1 5665/-1330 TT haplotype was over represented significantly in controls than in patients (P = 0.04). Conclusion: The studied polymorphisms do not seem to be a major risk for vitiligo. Haplotype analysis denoting protective effects against vitiligo may indicate an indirect interaction in the course of vitiligo. In addition, EDNRA + 70 polymorphism is protective against generalized type of vitiligo and associated diseases.
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    The modulatory action of C-Vx substance on the immune system in COVID-19
    (TAYLOR \& FRANCIS LTD, 2022-01-01) Tahrali, Ilhan; Akdeniz, Nilgun; Yilmaz, Vuslat; Kucuksezer, Umut C.; Oktelik, Fatma B.; Ozdemir, Ozkan; Cetin-Aktas, Esin; Ogutmen, Yelda; Ergen, Arzu; Abaci, Neslihan; Tuzun, Erdem; Oncul, Oral; Deniz, Gunnur
    The modulatory effect of C-Vx, a novel therapeutic agent, on the immune system of COVID-19 patients was investigated. The functions of T and NK cells of COVID-19 patients with different disease severity were evaluated by flow cytometry in response to C-Vx stimulation. The levels of pro- and anti-inflammatory cytokines were detected by multiplex assay in supernatants after cell culture with C-Vx. Bradykinin, IRF3, and IFN-alpha levels were also measured by ELISA in the presence or absence of C-Vx stimulation. As a result, increased CD107a expression was observed on NK cells in response to C-Vx addition. The proliferation of T cell subsets was increased by C-Vx, decreasing by disease severity. IL-4 and IL-10 levels were elevated while IFN-gamma and IL-17 levels were reduced in T cells following C-Vx stimulation. However, the levels of pro-inflammatory IL-1 beta, IL-6, IL-8, IFN-gamma and GM-CSF were significantly increased upon C-Vx stimulation. IFN-alpha levels tended to increase after incubation with C-Vx. These findings support an immunomodulatory action of C-Vx on the immune system of patients with a mild and moderate phase of COVID-19.
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    VITAMIN D DEFICIENCY DID NOT AUGMENT THE PROGRESSION OF HIGH-FRUCTOSE-INDUCED NONALCOHOLIC FATTY LIVER DISEASE IN RATS
    (ISTANBUL UNIV, FAC MEDICINE, PUBL OFF, 2021-01-01) Bingul, Ilknur; Kucukgergin, Canan; Aydin, Abdurrahman Fatih; Ekici, Isin Dogan; Abbasoglu, Semra Dogru; Uysal, Mujdat
    Objective: Vitamin D has antioxidant, anti-inflammatory and antiglycation activities, and hepatoprotective potential. There is a relationship between vitamin D deficiency (VDD) and the severity of liver disorders. VDD has been proposed to contribute to the progression of nonalcoholic fatty liver disease (NAFLD). However, experimental results are not clear. Therefore, in this study, the effects of a VDD diet on high fructose (HFr) drinking-induced NAFLD was evaluated. Material and Method: Male Wistar rats were divided into four groups as control, HFr, VDD+HFr, and VDD. Control and HFr groups were fed a control diet, and other groups with a VDD-diet for 12 weeks. HFr (30\%
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    Obstructive Sleep Apnea and Cancer
    (GALENOS PUBL HOUSE, 2016-01-01) Demir, Ceyda Erel Kirisoglu
    Obstructive sleep apnea (OSA) is a common disorder which is associated with increased morbidity and mortality. There is growing evidence that patients with OSA have higher incidence of cancer, accelerated progression and cancer mortality. Intermittent hypoxia, oxidative stress and sleep fragmentation are hold responsible for cancer development.
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    Inflammation and thrombosis in patients with COVID-19: A prothrombotic and inflammatory disease caused by SARS coronavirus-2
    (AVES, 2020-01-01) Pamukcu, Burak
    Coronavirus disease 2019 (COVID-19) caused by ``Severe Acute Respiratory Syndrome Coronavirus-2{''} (SARS-CoV-2) infection emerged in Wuhan, a city of China, and spread to the entire planet in early 2020. The virus enters the respiratory tract cells and other tissues via ACE2 receptors. Approximately 20\% of infected subjects develop severe or critical disease. A cytokine storm leads to over inflammation and thrombotic events. The most common clinical presentation in COVID-19 is pneumonia, typically characterized by bilateral, peripheral, and patchy infiltrations in the lungs. However multi-systemic involvement including peripheral thromboembolic skin lesions, central nervous, gastrointestinal, circulatory, and urinary systems are reported. The disease has a higher mortality compared to other viral agents causing pneumonia and unfortunately, no approved specific therapy, nor vaccine has yet been discovered. Several clinical trials are ongoing with hydroxychloroquine, remdesivir, favipiravir, and low molecular weight heparins. This comprehensive review aimed to summarize coagulation abnormalities reported in COVID-19, discuss the thrombosis, and inflammation-driven background of the disease, emphasize the impact of thrombotic and inflammatory processes on the progression and prognosis of COVID-19, and to provide evidence-based therapeutic guidance, especially from antithrombotic and antiinflammatory perspectives.