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    Effect of serum adropin levels on circulating endothelial dysfunction biomarkers in COVID-19 patients
    (2023) Gunesacar, Ramazan; Eksi, Durkadin Demir; Alpay, Ali Seydi; Hanikoglu, Ferhat; Erdogan, Haluk
    Purpose: Several studies show that the symptoms of severe COVID-19 infection reflect the clinical phenotype of endothelial dysfunction and share common pathophysiological mechanisms with endothelial dysfunction. Therefore, the aim of the study was to investigate the effect of serum adropin levels on endothelial dysfunction biomarkers and determine whether adropin could be a new biomarker for COVID-19. Materials and Methods: The study included 40 patients with mild/moderate COVID-19, 48 patients with severe/critical COVID-19, and 37 controls. Serum adropin and circulating biomarkers of endothelial dysfunction including asymmetric dimethylarginine (ADMA), endothelin-1 (ET-1), endothelial nitric oxide synthase (eNOS), soluble intercellular adhesion molecule-1 (sICAM-1) and plasminogen activator inhibitor-1 (PAI-1) levels were determined by micro-ELISA. Results: Serum adropin levels were found to be significantly higher in COVID-19 patients (165.2±11.49 pg/ml) than in controls (85.46±12.08 pg/ml). Serum adropin levels of patients with severe/critical symptoms (194±16.23 pg/ml) were significantly higher than the patients with mild/moderate symptoms (130.6 ±14.53). In addition, serum ADMA, eNOS, and, ET-1 levels were significantly higher in the COVID-19 subjects (150.5±8.67 ng/ml, 172.4±14.01 pg/ml, 159.3±10.19 pg/ml, respectively) than that those in the controls (104.5±9.182 ng/ml, 141.4±17.74 pg/ml, 100.1±11.37 pg/ml, respectively). Significant positive correlations were found between adropin and ADMA, eNOS, ET-1, sICAM-1, and PAI-1 levels in the patients. Conclusion: We suggest that adropin may be a new potential biomarker for COVID-19 and an important molecule in restoring endothelial cell damage. Positive correlations between serum adropin levels and ADMA, eNOS, ET-1, sICAM-1 and PAI-1 levels in patients suggest that adropin may compensate for damage to endothelial cells.
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    Effect of serum adropin levels on circulating endothelial dysfunction biomarkers in COVID-19 patients
    (Cukurova Univ, Fac Medicine, 2023) Gunesacar, Ramazan; Eksi, Durkadin Demir; Alpay, Ali Seydi; Hanikoglu, Ferhat; Erdogan, Haluk
    Purpose: Several studies show that the symptoms of severe COVID-19 infection reflect the clinical phenotype of endothelial dysfunction and share common pathophysiological mechanisms with endothelial dysfunction. Therefore, the aim of the study was to investigate the effect of serum adropin levels on endothelial dysfunction biomarkers and determine whether adropin could be a new biomarker for COVID-19.Materials and Methods: The study included 40 patients with mild/moderate COVID-19, 48 patients with severe/critical COVID-19, and 37 controls. Serum adropin and circulating biomarkers of endothelial dysfunction including asymmetric dimethylarginine (ADMA), endothelin-1 (ET-1), endothelial nitric oxide synthase (eNOS), soluble intercellular adhesion molecule-1 (sICAM-1) and plasminogen activator inhibitor-1 (PAI-1) levels were determined by micro-ELISA. Results: Serum adropin levels were found to be significantly higher in COVID-19 patients (165.2 & PLUSMN;11.49 pg/ml) than in controls (85.46 & PLUSMN;12.08 pg/ml). Serum adropin levels of patients with severe/critical symptoms (194 & PLUSMN;16.23 pg/ml) were significantly higher than the patients with mild/moderate symptoms (130.6 & PLUSMN;14.53). In addition, serum ADMA, eNOS, and, ET-1 levels were significantly higher in the COVID-19 subjects (150.5 & PLUSMN;8.67 ng/ml, 172.4 & PLUSMN;14.01 pg/ml, 159.3 & PLUSMN;10.19 pg/ml, respectively) than that those in the controls (104.5 & PLUSMN;9.182 ng/ml, 141.4 & PLUSMN;17.74 pg/ml, 100.1 & PLUSMN;11.37 pg/ml, respectively). Significant positive correlations were found between adropin and ADMA, eNOS, ET-1, sICAM-1, and PAI-1 levels in the patients. Conclusion: We suggest that adropin may be a new potential biomarker for COVID-19 and an important molecule in restoring endothelial cell damage. Positive correlations between serum adropin levels and ADMA, eNOS, ET-1, sICAM-1 and PAI-1 levels in patients suggest that adropin may compensate for damage to endothelial cells.
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    Elevated Blood Levels of VEGF Exhibiting Positive Correlation with HIF-1? in Obesity: A Single Center Study
    (2025) Uluergüven, Nazmiye; Eksi, Durkadin Demir; Maytalman, Erkan; Gunesacar, Ramazan
    Aim: The objective of this study was to investigate the relevance of plasma hypoxia-inducible factor-1 alpha (HIF-1?) and vascular endothelial growth factor (VEGF) levels in obesity and their associations with body mass index (BMI), body fat percentage, and waist to-hip ratio. Material and Methods: The study included 45 obese subjects and 28 healthy controls recruited from a private clinic in Manavgat, Antalya. The measurement of BMI, percentage of body fat, and waist-to-hip ratio was conducted in all subjects using a bioelectrical impedance analysis device. The plasma levels of HIF-1? and VEGF were measured using the micro-ELISA method. Results: In the Mann-Whitney U test, HIF-1? levels were similar in obese subjects (median=1.439 ng/L [Interquartile range (IQR)=11.62, min-max=0.904-12.53] and control group (median=1.377 ng/L [1.323, 0.852-2.175], p=0.0821). VEGF levels were found to be significantly higher in obese subjects compared to the controls (medians; 729.8 ng/L [5515, 485.3-6000] vs. 589.5 ng/L, [416.8, 396.4-813.2], respectively, p
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    Lack of Association Between FNDC5 Gene Polymorphisms, Serum Irisin Levels and Allergic Rhinitis
    (2023) Eksi, Durkadin Demir; Günizi, Hüseyin
    Aim: Allergic rhinitis (AR) is an inflammatory nasal mucosa disease caused by type 1 immunoglobulin E-mediated reactions to allergen exposure. Irisin is a hormone released by skeletal muscles in response to exercise. There are studies that demonstrate the relationship of irisin with inflammation. We aimed to investigate the potential association between irisin coding fibronectin type III domain 5 (FNDC5) gene polymorphisms, serum irisin levels, and AR. Method: A case-control study was designed, involving 100 AR patients and 100 healthy controls. Genotyping of rs726344 and rs1746661 SNPs within the FNDC5 gene was performed using PCR-RFLP method. Serum irisin levels were measured using ELISA. Results: Genotyping of rs726344 SNP in patients revealed 90% GG and 10% GA genotypes, while in controls, it was 94% GG and 6% GA. The AA genotype was not detected in any case. For rs1746661 SNP, patients had 57% GG, 39% GT, and 4% TT genotypes, while controls had 58% GG, 36% GT, and 6% TT genotypes. No significant difference was found in rs726344 and rs1746661 SNPs between the patients and the control group. Serum irisin level was 406.3±56.09 ng/ml in patients and 354.3±46.06 ng/ml in controls with no significant difference. Conclusion: This is the first study aiming to investigate the relationship between the irisin protein, its encoding gene, and AR. No significant association was identified between FNDC5 gene polymorphisms, serum irisin levels, and allergic rhinitis. While these findings suggest a limited role of these factors in AR, further studies are needed for more comprehensive understanding of the irisin-AR relationship.
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    Novel Gene Variants Associated with Primary Ciliary Dyskinesia
    (Springer India, 2022) Eksi, Durkadin Demir; Yilmaz, Elanur; Basaran, A. Erdem; Erduran, Gizem; Nur, Banu; Mihci, Ercan; Karadag, Bulent
    Objectives To determine the demographic, clinical, and genetic profile of Turkish Caucasian PCD cases. Methods Targeted next-generation sequencing (t-NGS) of 46 nuclear genes was performed in 21 unrelated PCD cases. Sanger sequencing confirmed of potentially disease-related variations, and genotype-phenotype correlations were evaluated. Results Disease-related variations were identified in eight different genes (CCDC39, CCDC40, CCDC151, DNAAF2, DNAAF4, DNAH11, HYDIN, RSPH4A) in 52.4% (11/21) of the cases. The frequency of variations for CCDC151, DNAH11, and DNAAF2 genes which were highly mutated genes in the cohort was 18% in 11 patients. Each of the remaining gene variations was detected once (9%) in different patients. The variants, p.R482fs*12 in CCDC151, p.E216* in DNAAF2, p.I317* in DNAAF4, p.L318P and p.R1865* in DNAH11, and p.N1505D and p.L1167P in HYDIN gene were identified as novel variations. Interestingly, varying phenotypic findings were identified even in patients with the same mutation, which once again confirmed that PCD has a high phenotypic heterogeneity and shows individual differences. Conclusion This t-NGS panel is potentially helpful for exact and rapid identification of reported/novel PCD-disease-causing variants to establish the molecular diagnosis of ciliary diseases.
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    The Role of Energy Homeostasis-Associated Gene Expression and Serum Adropin Levels in Patients with Familial Mediterranean Fever
    (Mdpi, 2025) Eksi, Durkadin Demir; Duran, Gulay Gulbol; Celik, Muhammet Murat; Eksi, Yunus Emre; Gunesacar, Ramazan
    Familial Mediterranean Fever (FMF) is a genetic autoinflammatory disease primarily affecting populations in the Mediterranean region. The pathogenesis of FMF and the roles of various molecules remain unclear. Adropin, a protein encoded by the Energy Homeostasis-Associated Gene (ENHO), is involved in energy metabolism and inflammation. This study aimed to explore the relationship between ENHO expression, Adropin levels, and FMF, examining their correlations with disease characteristics. This study included 30 patients clinically diagnosed with FMF and 35 healthy controls. The ENHO expression in peripheral blood mononuclear cells was assessed using a qRT-PCR, and the serum Adropin levels were measured via ELISA. The ENHO expression was significantly elevated in the FMF patients compared to the controls (p = 0.0007), while no significant differences were observed in the serum Adropin levels between the groups (p = 0.81). A correlation analysis revealed a negative association between the ENHO expression and age (r = -0.47, p = 0.009), whereas the serum Adropin levels were positively correlated with age, disease onset, and diagnostic delay (p < 0.05). No significant associations were found between the ENHO expression and Adropin levels or FMF clinical features. These findings suggest that increased ENHO expression may play a role in FMF pathophysiology, potentially as a compensatory mechanism. The correlation between Adropin levels and disease onset indicates a potential protective role. Further studies are needed to confirm these findings.
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    The Role of WNT3A Protein and Gene Variants in Allergic Rhinitis: A Case-Control Study
    (Mdpi, 2024) Eksi, Durkadin Demir; Gunizi, Huseyin
    Allergic rhinitis (AR) is a prevalent inflammatory disorder of the upper respiratory tract, driven by allergen exposure. Understanding mechanisms and identifying biomarkers for AR could significantly impact diagnosis and treatment. This study aimed to investigate the association between serum Wingless-Type MMTV Integration Site Family, Member 3A (WNT3A) protein levels, WNT3A polymorphisms, and AR. A cohort of 92 AR patients and 86 healthy controls was recruited. Serum WNT3A levels were measured by enzyme-linked immunosorbent assay (ELISA). WNT3A gene polymorphisms (rs752107 and rs3121310) were analyzed using Polymerase Chain Reaction- Restriction Fragment Length Polymorphism (PCR-RFLP) method. The study revealed significantly higher serum WNT3A levels in AR patients compared to controls (p < 0.0001). The impact of WNT3A in the differential diagnosis of AR was determined to be moderate, with an area under the curve (AUC) value of 0.67 (95% Confidence Interval: 0.59-0.75) based on the receiver operating characteristic (ROC) curve analysis. The rs3121310 polymorphism showed a significant association with the GA genotype more prevalent in controls (p < 0.05). However, no significant relationship was observed between rs3121310 genotypes and clinical parameters of the patients. These findings suggest a role for WNT3A in AR pathogenesis, given the elevated serum levels in patients. Larger cohort studies are needed to validate these findings and explore serum WNT3A levels as a biomarker for AR diagnosis and treatment monitoring.