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    Diagnostic Value of Plasma Soluble Triggering Receptor Expressed on Myeloid Cells-1 in Children with Urinary Tract Infections
    (Georg Thieme Verlag Kg, 2021) Tursun, Serkan; Alpcan, Aysegul; Ozsoy, Metin; Badem, Nermin Dindar; Kandur, Yasar; Acar, Banu Celikel
    Objective The aim of the present study was to evaluate the diagnostic value of soluble triggering receptor on myeloid cells-1 as a novel marker for diagnosis of childhood urinary tract infections (UTI). Methods This study enrolled 30 pediatric patients diagnosed with acute febrile UTIs; 30 healthy children were included as the control group. The blood samples from the patients and healthy controls were collected for a soluble triggering receptor on myeloid cells-1 (sTREM-1) test. Results The study group was composed of 9 males and 21 females, and the mean age of the study population was 6.63.2 (range=1-14) years. sTREM-1 levels were significantly higher in UTI patients than in the controls (592 +/- 323 vs. 490 +/- 299 pg/mL, p=0.04). The receiver operating curve analysis revealed a cut-off value of soluble triggering receptor expressed on myeloid cells-1 of 514 ng/mL (area under the curve=0.562). When the cut-off value was taken 514 pg/mL, soluble triggering receptor expressed on myeloid cells-1 had a sensitivity of 57% and a specificity of 50% for the diagnosis of UTI. Conclusion The present study revealed that plasma sTREM-1 level may be elevated in UTI and may therefore serve as a useful predictive tool for the diagnosis of UTI.
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    Serum levels of nitrate, nitrite and advanced oxidation protein products (AOPP) in patients with nonalcoholic fatty liver disease
    (Univ Catholique Louvain-Ucl, 2015) Ciftci, Aydin; Yilmaz, Bulent; Koklu, Seyfettin; Yuksel, Osman; Ozsoy, Metin; Erden, Gonul; Cesur, Salih
    Background and study aims : Oxidative stress is increased and anti-oxidant defense mechanisms are impaired in patients with hepatosteatosis. The aim of the present study was to evaluate the serum levels of several oxidant and anti-oxidant markers in patients with nonalcoholic fatty liver disease (NAFLD). Patients and Methods : Thirty-four patients with NAFLD, and 19 healthy controls were included. In this study, we measured serum nitrate and advanced oxidation protein product (AOPP) as the oxidizing products and nitrite as the anti-oxidizing marker. Nitrate and nitrite levels were measured using a calorimetric method, and levels of serum AOPP were measured by a spectrophotometric method using a commercial ELISA kit. Results : Serum nitrate and AOPP levels were significantly higher in the NAFLD group compared to the control group. Serum nitrite and N-N levels were similar between the two groups. Serum nitrate and N-N levels were found to be significantly higher in patients with elevated ALT levels compared to patients with normal ALT levels. Serum nitrite and AOPP levels were comparable between these groups. Mean platelet volume (MPV) was significantly lower in the NAFLD group compared to the control group. Conclusions : Serum levels of oxidizing agents including nitrate and AOPP increase in patients with NAFLD. In contrast, serum nitrite, an antioxidant agent, does not adequately increase to compensate for the oxidizing effects in these patients.
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    The Diagnostic Value of Soluble Triggering Receptor Expressed on Myeloid Cells for Patients with Acute Stone Pyelonephritis
    (Mdpi, 2024) Ozsoy, Metin; Ataman, Mirac; Sahin, Serhat Kazim; Senocak, Ibrahim; Varlibas, Artuner; Yuvanc, Ercan; Cifci, Aydin
    Soluble triggering receptor expressed on myeloid cells (sTREM-1) is a new biomarker that can be used for the diagnosis and monitoring of urinary system infections. This study aimed to evaluate the diagnostic performance of serum sTREM-1 in patients with a diagnosis of acute stone pyelonephritis (ASP). This prospective study included 46 patients with a diagnosis of ASP and a control group of 23 individuals without urinary system infection. Blood samples were taken from participants upon hospital admission, and basal serum sTREM-1 levels were analyzed using the ELISA method. Serum sTREM-1 concentrations were measured after treatment of ASP patients. Basal leukocyte counts, C-reactive protein (CRP) levels, procalcitonin (PCT), and sTREM-1 (98.6 vs. 68.4 pg/mL, p < 0.001) levels were higher in the ASP group compared to the control group. After treatment, the median leukocyte counts, PCT, and sTREM-1 levels decreased and were similar to those of the control group. The median CRP level also decreased after treatment, but it remained higher than that of the control group. In predicting patients with ASP, the baseline sTREM-1 exhibited a sensitivity of 74.6% and a specificity of 78.2%, while its diagnostic performance was lower than that of leukocyte counts, CRP, and PCT. Despite the findings that levels of sTREM-1 were higher upon hospital admission in patients with ASP and significantly decreased after treatment, the utility of sTREM-1 as a biomarker for predicting patients with ASP remains constrained when compared to established inflammatory markers.