Yazar "Gulen, Tugba Arslan" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Choroidal thickness and retinal nerve fiber layer analysis in acute systemic brucellosis
    (Sage Publications Inc, 2021) Zor, Kursad Ramazan; Gulen, Tugba Arslan; Bicer, Gamze Yildirim; Kucuk, Erkut; Imre, Ayfer; Odemis, Ilker; Kayabas, Uner
    Introduction This study aims to detect changes in choroidal thickness and retinal nerve fiber layer (RNFL) thickness in acute stage brucellosis. Methods Fnewly diagnosed patients with acute brucellosis and 19 healthy individuals as control group were included in the study. Choroidal thickness and RNFL thickness were measured using the Spectral Domain Cirrus OCT Model 400 (Carl Zeiss Meditec, Jena, Germany) for each participant in the patient and control group. Results In the brucella group, in the right eyes, the mean nasal choroidal thickness was 272.77 +/- 50.26 mu m (p = 0.689), the mean subfoveal choroidal thickness was 321.14 +/- 33.08 mu m (p = 0.590), the mean temporal choroidal thickness was 278.86 +/- 48.84 mu m (p = 0.478), and the mean RNFL thickness was 90.43 +/- 8.93 mu m (p = 0.567). In the left eyes, the mean nasal choroidal thickness was 282.29 +/- 48.93 mu m (p = 0.715), the mean subfoveal choroidal thickness was 316.79 +/- 39.57 mu m (p = 0.540), the mean temporal choroidal thickness was 284.93 +/- 50.57 mu m (p = 0.392), and the mean RNFL thickness was 92.64 +/- 8.95 mu m (p = 0.813). Conclusion No difference was found between the control and the brucella groups regarding to all choroidal regions and RNFL thickness.
  • Küçük Resim Yok
    Öğe
    Factors Affecting the Colistin Nephrotoxicity: Advanced Age and/or Other Factors?
    (Galenos Yayincilik, 2022) Gulen, Tugba Arslan; Imre, Ayfer; Kayabas, Uner
    Introduction: The population is aging, and older adults comprise most patients in the intensive care units. Colistin (COL) has been re-introduced to treat increasingly common resistant Gram-negative bacterial infections. Our study aims to investigate the factors affecting COL nephrotoxicity in a general population and geriatric age group. Materials and Methods: This retrospective study included 170 patients, a total of 116 (68.2%) of whom were in the geriatric group (age >= 65). Acute renal failure was evaluated using the RIFLE score. Factors associated with COL nephrotoxicity were described firstly in a general population and then in the geriatric group patients. Results: Advanced age [Odds ratio (OR): 1.043; 95% confidence interval (CI): 1.018-1.068; p=0.001] and initial serum creatinine level (OR: 23.122; 95 % CI: 3.123-171.217; p=0.002) were found to be the independent risk factors associated with nephrotoxicity. In the evaluation of the geriatric population based on nephrotoxicity, the initial serum urea and creatinine levels, and overall mortality rates were found to be statistically significantly higher in the group with nephrotoxicity (p<0.05). Initial serum creatinine level (OR: 22.48; 95 % CI: 2.835-178.426; p=0.003) and concomitant nephrotoxic agent use (OR: 2.516; 95 % CI: 1.275-4.963; p=0.008) were independent risk factors associated with nephrotoxicity in geriatric patients. Conclusion: Advanced age was found to be a risk factor for COL nephrotoxicity. Closed observation should be done especially in the geriatric patients who have initial serum creatinine levels close to the upper limit, concomitant use of the nephrotoxic drugs should be avoided, and if possible, evaluation should be made in terms of non-COL treatment options in these patients.
  • Küçük Resim Yok
    Öğe
    Is the course of COVID-19 associated with tuberculin skin test diameter? A retrospective study
    (Wiley, 2022) Gulen, Tugba Arslan; Bayraktar, Muhammet; Yaksi, Nese; Kayabas, Uner
    The pathogenesis of coronavirus disease 2019 (COVID-19) is still not fully understood. As severe acute respiratory syndrome coronavirus 2 (SARS-COV-2) has a similar pathogenetic pathway to Mycobacterium tuberculosis, it has been reported that there may be a relationship between Bacille Calmette-Guerin (BCG) vaccination rate and COVID-19 severity. This study investigated the relationship between tuberculin skin test (TST) induration diameter and the clinical course of COVID-19. Of 1963 adult patients who underwent TST, 76 patients with SARS-COV-2 infection confirmed by RT-PCR analysis of respiratory tract samples were included in the study. Relationships between COVID-19 clinical severity and TST positivity, induration size, and other clinical parameters were analyzed. Of the 76 patients, TST results were negative for 53 patients (69.7%) and positive for 23 patients (30.3%). COVID-19 severity was mild in 47 patients (61.8%), moderate in 22 patients (28.9%), and severe in seven patients (9.3%). All TST-positive patients had mild disease. Patients with mild disease had a significantly higher TST positivity rate (p < 0.001) and larger induration diameter (p < 0.001). The area under the receiver operating characteristic (ROC) curve of TST induration size for the differentiation of mild with moderate and severe disease was 0.768 (p < 0.001). The maximum Youden J index value was 0.522 at an induration diameter of 6.5 mm, which had a sensitivity of 66.0% and specificity of 86.2%. COVID-19 patients with positive TST showed a significantly higher rate of mild disease than those with negative TST. TST positivity is favorably associated with the course of COVID-19.
  • Küçük Resim Yok
    Öğe
    The Effect of Sex-Specific Genetic Factors on the Host Immune Response to COVID-19: A Pilot Study
    (Erciyes Univ Sch Medicine, 2022) Bali, Dilara Fatma Akin; Gulen, Tugba Arslan; Ozmen, Esma; Yuce, Zeynep Ture; Yildiz, Orhan; Turunc, Tuba; Kayabas, Uner
    Objective: The aim of this study was to investigate the impact of sex-specific genetic factors in the pathogenesis and prog-nosis of severe acute respiratory syndrome coronavirus 2 (SARS-CoV2)-induced macrophage activation syndrome (MAS), independent of age and comorbidity presence.Materials and Methods: Patients aged 18-50 years who had been diagnosed with coronavirus 2019 (COVID-19), the disease caused by the SARS-CoV2 virus, were enrolled in a prospective, case-control, multi-center study. Genetic alterations and messenger RNA (m-RNA) expression levels of the TLR7, TLR8, ACE2, CD40L, CXCR3, and TASL genes were determined using DNA sequencing analysis, and gene expression was determined using quantitative reverse transcriptase polymerase chain reaction testing. PolyPhen-2 (Polymorphism Phenotyping v2; Adzhubei et al., 2010) and SNAP2 (Rostlab, Munich, Germany) genetic analysis tools were used to define the pathogenic effects of detected mutations by sequencing the selected genes in hotspot regions.Results: The study group consisted of 80 patients diagnosed with COVID-19 and was divided into groups based on sex and MAS status. Twenty-nine mutations were detected in 6 genes. Among the alterations, 15 were identified in this study for the first time and 9 were pathogenic. Pathogenic missense mutations in the TLR7, TLR8, ACE2, and TASL genes were detected in the MAS (+) group. In males, decreased TLR7, TLR8, and CXCR3 expression was statistically significant in the MAS (+) group (p<0.050). CXCR3 expression was lower in the female and male MAS (+) groups compared with the MAS (-) groups (p<0.050).Conclusion: In the absence of major risk factors for COVID-19, the TLR7/8, ACE2, and CXCR3 variants and decreased m-RNA expression levels associated with genetic susceptibility may be independent prognostic risk factors for COVID-19.