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    Evaluation of IGFBP5 expression and plasma osteopontin level in COVID-19 patients
    (Elsevier Urban & Partner Sp Z O O, 2023) Uzuncakmak, Sevgi Karabulut; Aksakal, Alperen; Kerget, Ferhan; Aydin, Pelin; Halici, Zekai
    Purpose: The aim of this study is to investigate insulin-like growth factor binding protein 5 (IGFBP5) expression in coronavirus disease 2019 (COVID-19) patients and its relationships with COVID-19 laboratory findings and plasma osteopontin (OPN) levels.Materials and methods: We enrolled 60 patients with COVID-19 and 30 healthy individuals in this study. mRNA expression of IGFBP5 was measured by RT-PCR. Plasma OPN levels were measured via the ELISA method.Results: Plasma OPN levels were higher and IGFBP5 expression levels were lower in COVID-19 patients than in the healthy individuals (p = 0.0057 and p = 0.0142, respectively). Critically ill patients had higher OPN and lower IGFBP5 than non-critically ill patients. Patients with affected lungs demonstrated increased OPN and decreased IGFBP5 (p = 0.00032 and p = 0.044, respectively). Receiver operating characteristic (ROC) analysis indicated that IGFBP5 expression and OPN levels can be used discriminate non-critically from critically ill patients (p = 0.049; p = 0.0016, respectively).Conclusion: This study demonstrated that patients with a poor prognosis had increased OPN and decreased IGFBP5. High values of OPN and low values of IGFBP5 may be considered as signs of disease severity. Tissue -specific IGFBP5 expression may contribute to understanding the role of IGFBP5 in the lungs in COVID-19 cases.
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    LRIG1 levels in chronic rhinosinusitis with nasal polyps
    (Cukurova Univ, Fac Medicine, 2023) Uzuncakmak, Sevgi Karabulut; Sahin, Abdulkadir; Ozcelik, Aysegul Tavaci; Halici, Zekai
    Purpose: Nasal polyps (NPs), usually occurring together with chronic rhinosinusitis (CRS), are benign masses of mucosal origin arising from inflammation. The transmembrane protein known as leucine-rich repeats and immunoglobulin-like domains 1 (Lrig1) is a member of the Lrig family. Lrig1 is frequently expressed in the respiratory tract and epithelial tissues and can inhibit several signaling pathways involved in cell proliferation. The aim of this study was to determine Lrig1 levels in NP tissues of patients with CRS. Material and Methods: This study included 36 patients with CRS and NPs and 15 patients who underwent rhinoplasty as the control group. The Lrig1 levels of all participants were measured by the ELISA method.Results: This study revealed that Lrig1 levels were significantly lower in NP tissues than in tissues of the control group. The mean level of Lrig1 of the NP tissues was 22.2 ng/ml, while the mean level of the control group was 28.5 ng/ml. According to the results of ROC analysis, Lrig1 levels have the power to distinguish polyp tissues from control tissues (AUC=0.794). Lrig1 levels were higher in tissues with scores of 4-8 than in tissues with scores of 16-20 based on the results of computed tomography scoring. According to endoscopic evaluations, Lrig1 levels of tissues with scores of 5-8 or 9-11 were relatively lower than those of tissues with scores of 2-4.Conclusion: Lrig1 levels were found to be decreased in NP tissues. Thus, Lrig1 may be used to confirm the presence of NPs. Lrig1 may also be helpful in NP grading. Increasing the Lrig1 levels in cases of NPs has the potential to become a targetable treatment modality.
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    Preliminary investigation of gene expression levels of PAPP-A, STC-2, and HIF-1? in SARS-Cov-2 infected patients
    (Springer, 2022) Uzuncakmak, Sevgi Karabulut; Naldan, Muhammet Emin; Dirican, Ebubekir; Kerget, Ferhan; Halici, Zekai
    Background Coronavirus-19 is still considered a pandemic that influences the world. Other molecular alterations should be clearer besides the increasing cytokine storm and pro-inflammatory molecules. Hypoxic conditions that induce HIF-1 alpha lead to stimulate gene expression of STC-2 that targets PAPP-A expression. This study aimed to determine gene expression levels of PAPP-A, STC-2, and HIF-1 alpha in COVID-19 infection. We also aimed to reveal the relationship of these genes with laboratory and clinical data of COVID-19 patients. Materials and Results We extracted RNA from peripheral blood samples of COVID-19(+) and COVID-19(-) individuals. The real-time PCR method was used to measure mRNA expression of PAPP-A, STC-2, and HIF-1 alpha. Gene expression analysis was evaluated by the 2(-Delta Delta Ct) method. PAPP-A, STC-2, and HIF-1 alpha mRNA expressions of severe patients were higher than healthy individuals (p = 0.0451, p= 0.4466, p < 0.0001, respectively). Correlation analysis of gene expression patterns of severe patients demonstrated a positive correlation between PAPP-A and STC-2 (p <0.0001, r= 0.8638). Conclusion This is the first study that investigates the relation of PAPP-A, STC-2, and HIF-1 alpha gene expression in patients with COVID-19 infection. Besides the routine laboratory findings, PAPP-A, STC-2, and HIF-1 alpha mRNA expressions may be considered to patients' prognosis as a sign of increased cytokines and pro-inflammatory molecules.
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    Suberosin Alleviates Sepsis-Induced Lung Injury in A Rat Model of Cecal Ligation and Puncture
    (Taylor & Francis Inc, 2023) Uzuncakmak, Sevgi Karabulut; Halici, Zekai; Karakaya, Songul; Kutlu, Zerrin; Saglam, Yavuz Selim; Bolat, Ismail; Aydin, Pelin
    Background/aims Sepsis is one of the major problems encountered in intensive care units, causing organ damage and increasing mortality. Suberosin (SBR) is a type of coumarin with antioxidant and anti-inflammatory activities. The goal of this study is to explore the protective effects of SBR on the lungs in a rat model of sepsis. Methods Male Wistar rats were utilized in this study. A cecal ligation and puncture (CLP) model was applied to induce sepsis. Rats were separated into six groups with nine animals in each group, including healthy control, SBR, CLP, and CLP + SBR (5, 10, and 20 mg/kg) groups. Superoxide dismutase (SOD), glutathione (GSH) enzyme activities, and malondialdehyde (MDA) level were measured via enzyme-linked immunosorbent assay (ELISA). The messenger RNA (mRNA) expressions of tumor necrosis factor alpha (TNF-alpha) and interleukin 1 beta (IL-1 beta) were evaluated by real-time polymerase chain reaction (RT-PCR). Histopathological changes in the lungs were investigated with hematoxylin and eosin (H&E). Results MDA levels and GSH and SOD enzyme activities were negatively affected in the CLP group, but SBR treatment ameliorated these oxidative stress parameters in the SBR1-3 groups (p< 0.05). The mRNA expressions of TNF-alpha and IL-1 beta were increased in the CLP group, and SBR treatment decreased those expression levels in a dose-dependent manner (p < 0.05). Organ damage and necrosis were seen in the CLP group and were alleviated in the SBR3 group. Immunohistochemical (IHC) analysis of lung tissues demonstrated decreased TNF-alpha and IL-1 beta immunopositivity in the SBR1-3 groups (p< 0.05). Conclusions SBR ameliorated sepsis-related lung injury in a dose-dependent manner. This compound has significant potential as a future agent in the treatment of sepsis.