Clinical biochemistry最新文献

{"title":"Secretoneurin is not associated with cardiovascular events or mortality in patients treated with hemodialysis: A prospective multicenter cohort study","authors":"Caroline Liboriussen ,&nbsp;Louis Nygaard ,&nbsp;Magnus Nakrem Lyngbakken ,&nbsp;Sara Marie Engelsvold Bakkan ,&nbsp;Jens Dam Jensen ,&nbsp;Rie Io Glerup ,&nbsp;Torbjørn Omland ,&nbsp;Helge Røsjø ,&nbsp;My Hanna Sofia Svensson","doi":"10.1016/j.clinbiochem.2025.110899","DOIUrl":"10.1016/j.clinbiochem.2025.110899","url":null,"abstract":"<div><h3>Introduction</h3><div>Secretoneurin (SN) is a novel cardiac biomarker with an upper reference limit of ∼60 pmol/L in healthy individuals. High SN concentrations have been associated with an increased risk of mortality in various cardiac diseases. We investigated the association between SN and the risk of cardiovascular (CV) events and all-cause mortality in patients treated with maintenance hemodialysis (HD).</div></div><div><h3>Materials and Methods</h3><div>Prospective multicenter cohort study with five years of follow-up. Serum SN (pmol/L) was measured at baseline. Outcomes were CV events (composite outcome) and all-cause mortality. The population was divided into tertiles according to SN concentrations: tertile 1 &lt; 110.7 pmol/L, tertile 2 110.7–143 pmol/L, and tertile 3 &gt; 143 pmol/L. The association between SN tertiles and outcomes was examined using Cox regression analysis.</div></div><div><h3>Results</h3><div>The study included 336 patients treated with HD. Median SN concentration was 126 (100–153) pmol/L. During a median follow-up of 5.05 (5.02–5.07) years, 42 % had a CV event and 60 % died. Despite overall high SN concentrations, neither SN tertile 2 nor SN tertile 3 was associated with the risk of CV events (HR_tertile2 1.27 (95 % CI 0.84–1.93) and HR_tertile3 1.20 (95 % CI 0.76–1.90)) or all-cause mortality (HR_tertile2 0.84 (95 % CI 0.60–1.18) and HR_tertile3 0.90 (95 % CI 0.62–1.31)), when compared to tertile 1.</div></div><div><h3>Conclusions</h3><div>Patients treated with HD have high SN concentrations; however, SN was not associated with CV events or all-cause mortality after five years of follow-up. High concentrations of SN, possibly explained by both impaired renal clearance and a high prevalence of cardiomyopathy, may limit its prognostic relevance in patients treated with maintenance HD.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110899"},"PeriodicalIF":2.5,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143482367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnostic accuracy of breath tests based on volatile organic compounds for cancer: A systematic review and meta-analysis","authors":"Ming-Jun Jin ,&nbsp;En-Min Li ,&nbsp;Li-Yan Xu","doi":"10.1016/j.clinbiochem.2025.110898","DOIUrl":"10.1016/j.clinbiochem.2025.110898","url":null,"abstract":"<div><div>Exhaled volatile organic compounds (VOCs) are being extensively studied for the purposes of noninvasive cancer diagnoses. This systematic review and <em>meta</em>-analysis aims to evaluate the diagnostic accuracy of breath tests based on VOCs for cancer detection, and to propose potential cancer biomarkers. This study was conducted in accordance with the Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) guidelines. Relevant studies up to February 2024 were retrieved from public databases, including PubMed, EMBASE, and Web of Science. A total of 114 articles were included, covering 125 non-duplicate studies involving 8768 cancer patients. Meta-analysis showed that the VOC breath test demonstrated a sensitivity of 87% and a specificity of 81% in cancer diagnosis, with an area under the receiver operating characteristic curve (AUC) of 0.93. Subgroup analyses based on cancer types and breath detection techniques also showed high sensitivity and specificity in diagnosing cancer patients. These suggest that breath analysis for VOCs has excellent diagnostic accuracy for cancer. The breath test based on VOCs, as a non-invasive detection method, shows great potential for cancer diagnosis.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110898"},"PeriodicalIF":2.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cardiac troponin I is associated with ICU admission in pediatric patients with RSV.","authors":"Meghan Brown, Sydney Lawless, Brittany Roemmich, Stephen M Roper, Christopher W Farnsworth","doi":"10.1016/j.clinbiochem.2025.110896","DOIUrl":"https://doi.org/10.1016/j.clinbiochem.2025.110896","url":null,"abstract":"<p><strong>Background: </strong>Respiratory syncytial virus (RSV) is associated with morbidity and mortality in pediatric patients, but limited tools exist for prognostication of outcomes that may facilitate more rapid treatment. We assessed the utility of cardiac troponin I (cTnI) to prognosticate intensive care unit (ICU) length of stay (LOS) and bronchiolitis in pediatric patients.</p><p><strong>Methods: </strong>Remnant EDTA plasma from 114 patients 6 months-18 years positive for RSV were enrolled. Forty-five patients with other respiratory infections were included as controls. The electronic medical record was assessed for demographic information. High sensitivity cTnI was assessed on an Abbott ARCHITECT i2000 within 24 h of collection. Proportions were compared using Fisher's exact test and multivariable logistic regression performed.</p><p><strong>Results: </strong>Of patients admitted to ICU with RSV, 56.9 % had cTnI ≥ the limit of detection (LOD) compared to 27.0 % of patients not admitted to the ICU. Receiver operator characteristic analysis revealed an area of 0.62 (0.53-0.72) for predicting ICU admission. At the limit of quantitation, cTnI had a sensitivity of 25.8 %, a specificity of 88.9 %, and a positive likelihood ratio of 2.32 for ICU admission. Multivariable logistic regression revealed that log2 increases in cTnI (doubling) was associated with an odds ratio (OR) of 1.34 (95 % CI: 1.03-1.78) for ICU admission. cTnI > the LOD was associated with an OR of 2.37 (1.03-5.57) for ICU admission and bronchiolitis (2.78, 1.09-7.83).</p><p><strong>Conclusions: </strong>Elevated cTnI above the LOD was associated with ICU admission and bronchiolitis in pediatric patients presenting with RSV. Further studies are needed to verify this finding.</p>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":" ","pages":"110896"},"PeriodicalIF":2.5,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143448399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Accelerated diagnostic pathways for myocardial infarction using a Siemens High-Sensitivity cardiac troponin I assay","authors":"Hiroyuki Azuma ,&nbsp;Masafumi Tada ,&nbsp;Hideyuki Matano ,&nbsp;Naoki Yamada ,&nbsp;Hiroyasu Uzui ,&nbsp;Koji Maeno ,&nbsp;Yoshimitsu Shimada ,&nbsp;Hiroyuki Yoshida ,&nbsp;Hajime Murahashi ,&nbsp;Masaki Ando ,&nbsp;Kenta Hachiya ,&nbsp;Shun Tanaka ,&nbsp;Tomonori Hattori ,&nbsp;Akira Kuriyama ,&nbsp;Takeshi Fujisawa ,&nbsp;Andrew R. Chapman ,&nbsp;Nicholas L. Mills ,&nbsp;Hiroyuki Hayashi ,&nbsp;Norio Watanabe ,&nbsp;Toshi A Furukawa","doi":"10.1016/j.clinbiochem.2025.110897","DOIUrl":"10.1016/j.clinbiochem.2025.110897","url":null,"abstract":"<div><h3>Background</h3><div>Few studies have comprehensively examined high-sensitivity cardiac troponin I (hs-cTnI) based diagnostic pathways for myocardial infarction (MI) in early presenters using a Siemens ADVIA Centaur hs-cTnI assay.</div></div><div><h3>Methods</h3><div>We conducted a prospective multicenter cohort study in Emergency Departments involving 414 patients suspected of MI within 6 h of symptom onset. We evaluated three hs-cTnI-based pathways (High-STEACS, ESC 0/1-h, 0/2-h); and four pathways incorporating medical history and physical findings (ADAPT, EDACS, HEART, GRACE). We evaluated negative predictive value (NPV) and sensitivity as safety measures, and percentage ruled out as an efficiency measure for a primary outcome of type 1 myocardial infarction or cardiac death within 30 days.</div></div><div><h3>Results</h3><div>Median age was 72 years (interquartile range 58–82), and 30.4 % (126/414) of patients were over 80. Females comprised 44.2 % (183/414) of patients, 87.7 % (363/414) had chest pain, and the primary outcome occurred in 9.2 % (38/414). The High-STEACS pathway ruled out 62.0 % of patients without missing a case of an MI. The ESC 0/1-h and 0/2-h pathways showed high NPV and sensitivities; however, they ruled out fewer patients (35.9 % and 45.2 %, respectively). The ADAPT, EDACS, and HEART pathways demonstrated high NPV and sensitivities but ruled out fewer patients (15–27 %). The GRACE pathway missed 2 cases with primary clinical outcomes. Among patients over 80 without MI, initial hs-cTnI concentration was ≥ 3 ng/L in 99.1 % and ≥ 5 ng/L in 84.1 %.</div></div><div><h3>Conclusions</h3><div>The High-STEACS pathway was the most efficient among the hs-cTnI-based pathways while maintaining excellent safety performance in early presenters.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110897"},"PeriodicalIF":2.5,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143432712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The expression of canopy FGF signaling regulator 2 serves as a diagnostic and prognostic indicator for NSCLC","authors":"Xiao Jiang ,&nbsp;Jun Chen ,&nbsp;Shujun Ding ,&nbsp;Jun Yin ,&nbsp;Jiying Gu ,&nbsp;Xiangming Fang","doi":"10.1016/j.clinbiochem.2025.110895","DOIUrl":"10.1016/j.clinbiochem.2025.110895","url":null,"abstract":"<div><h3>Background</h3><div>Non-small cell lung cancer (NSCLC) is the most common type of lung cancer. The identification of new biomarkers is crucial for enhancing early detection and treatment outcomes. This study explores the role of Canopy FGF Signaling Regulator 2 (CNPY2) in NSCLC progression and its potential as a diagnostic and prognostic biomarker.</div></div><div><h3>Methods</h3><div>CNPY2 expression was analyzed in 228 NSCLC tumor samples and adjacent normal tissues using quantitative RT-PCR and ELISA. Serum CNPY2 levels were also measured in 160 healthy controls and NSCLC patients. The relationship between CNPY2 expression and clinicopathological features, including epithelial-mesenchymal transition (EMT) markers, was assessed. Receiver operator curve analysis was used to evaluate the diagnostic potential of serum CNPY2, while Kaplan-Meier survival analysis assessed its prognostic significance.</div></div><div><h3>Results</h3><div>CNPY2 levels were significantly elevated in NSCLC tissues compared to adjacent normal tissues. Higher CNPY2 expression was associated with larger tumor size, advanced T stage, and higher N stage. Furthermore, CNPY2 expression was positively correlated with Vimentin and N-cadherin, and negatively correlated with E-cadherin. Elevated serum CNPY2 levels in NSCLC patients demonstrated moderate diagnostic accuracy, with an area under the curve of 0.78. High CNPY2 expression was also linked to reduced overall survival (p = 0.001).</div></div><div><h3>Conclusions</h3><div>CNPY2 is markedly overexpressed in NSCLC and is associated with increased tumor aggressiveness and EMT. Serum CNPY2 shows promise as a non-invasive biomarker for NSCLC diagnosis, and elevated expression is correlated with a poorer prognosis. Thus, CNPY2 may serve as both a valuable biomarker and a potential therapeutic target in NSCLC.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110895"},"PeriodicalIF":2.5,"publicationDate":"2025-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143406051","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cardiac function impairment in recipient twins of twin-to-twin transfusion syndrome: Insights from NT-proBNP levels in amniotic fluid","authors":"Wenyan Jian ,&nbsp;Dewei Guo ,&nbsp;Ruojin Yao ,&nbsp;Mi Pei ,&nbsp;Manhui Guo ,&nbsp;Fang Yang","doi":"10.1016/j.clinbiochem.2025.110894","DOIUrl":"10.1016/j.clinbiochem.2025.110894","url":null,"abstract":"<div><h3>Objectives</h3><div>To investigate changes in N-terminal pro-brain natriuretic peptide (NT-proBNP) levels in the amniotic fluid of recipient twins with twin-twin transfusion syndrome (TTTS), analyze the correlation between NT-proBNP and cardiac linear measurements, and assess the feasibility of NT-proBNP as a biochemical marker for fetal cardiac function.</div></div><div><h3>Design and methods</h3><div>A total of 47 pregnancies with TTTS, 21 idiopathic polyhydramnios pregnancies, and 114 normal singleton pregnancies were included from Xiangya Hospital of Central South University between October 2020 and July 2023. Fetal cardiac linear parameters, amniotic fluid depth, and NT-proBNP levels in amniotic fluid were measured across the three groups. The correlation of NT-proBNP with amniotic fluid depth, cardiac linear parameters, and CHOP score in TTTS recipients was analyzed.</div></div><div><h3>Results</h3><div>There was no statistically significant difference in amniotic fluid NT-proBNP levels and cardiac linear parameters between idiopathic polyhydramnios and normal singletons. However, NT-proBNP levels and cardiac parameters in TTTS recipient twins were significantly higher than in the other two groups (p &lt; 0.05). After adjusting for gestational variables, NT-proBNP levels in TTTS recipients showed significant correlations with atrial and ventricular diameters, ventricular wall thickness, cardiothoracic ratio, and CHOP score.</div></div><div><h3>Conclusions</h3><div>Amniotic fluid NT-proBNP is a sensitive and objective biochemical marker for assessing fetal cardiac function, independent of amniotic fluid volume. It serves as a valuable complement to echocardiographic assessment in evaluating the severity of fetal heart failure in TTTS recipients.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110894"},"PeriodicalIF":2.5,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143350435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metabolism of Natriuretic peptides and impact on insulin resistance and fat mass in healthy subjects","authors":"Timothy C.R. Prickett ,&nbsp;Lynley K. Lewis ,&nbsp;John F. Pearson ,&nbsp;Eric A. Espiner","doi":"10.1016/j.clinbiochem.2025.110893","DOIUrl":"10.1016/j.clinbiochem.2025.110893","url":null,"abstract":"<div><h3>Background</h3><div>Natriuretic peptides (NP) have important roles in regulating fat balance and metabolic health. Reduced concentrations of ANP and BNP in plasma are associated with increased insulin resistance in obesity. Whether this is due to increased clearance or reduced bioactivity of immunoreactive NP forms is unclear.</div></div><div><h3>Design and Method</h3><div>These questions were addressed in a community study of mildly obese subjects at middle age. The ratio of amino-terminal (NT) pro-NP to bioactive C-terminal NP was used as a putative index of the clearance of bioactive forms.</div></div><div><h3>Results</h3><div>Lower ratios of amino-terminal pro-NP to bioactive C-terminal NP were associated with increased insulin resistance. In linear regression models, NT-proANP and NT-proBNP outperformed ANP and BNP in predicting insulin resistance. Pro-NP glycosylation, which can impair NP and NT-proNP production in obesity, does not account for the diminished impact of ANP or BNP. Plasma concentrations of osteocrin, which competes for the NP clearance receptor (NPR-C) and potentially enhances NP bioactivity, was not associated with NPs, but did positively predict insulin resistance in females.</div></div><div><h3>Conclusions</h3><div>We find no evidence that increased clearance/degradation of NPs contributes to insulin resistance. Among the nine NP variants assessed, only NT-proANP and NT-proBNP independently predicted insulin resistance in both sexes. The impact of CNP on fat mass or insulin resistance was minor but significant in females. Lower concentrations of immunoreactive plasma ANP and BNP remains unexplained and requires closer study.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110893"},"PeriodicalIF":2.5,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative abnormalities in the β-region of the electrophoretic profile of serum proteins as predictive markers of monoclonality: Machine learning for monoclonality prediction","authors":"Sara Cherkaoui,&nbsp;Slavka Penickova ,&nbsp;Frederic Cotton","doi":"10.1016/j.clinbiochem.2025.110892","DOIUrl":"10.1016/j.clinbiochem.2025.110892","url":null,"abstract":"<div><h3>Objective of the study</h3><div>To develop a machine learning algorithm aimed at predicting the presence of a monoclonal (M-) protein when the β-globulin fraction is elevated.</div></div><div><h3>Materials and method</h3><div>Patients were selected as part of the University Hospital Laboratory of Brussels routine diagnostic procedures from October 2021 to April 2022. Adult patients with serum protein electrophoresis showing elevated β1 and/or β2 fractions were included. The selection was done following strict exclusion criteria such as acute inflammation, iron deficiency anemia signs or supposed liver disease. To construct a predictive model for prediction of positive immunofixation (IFE) for monoclonality, the following factors were used: age, sex, β1 and β2 concentration (g/L), total proteins (g/L), IgA, IgM, IgG values (g/L) and hypogammaglobulinemia. The dataset underwent a random split, divided into a foundational training set (80%, 247 samples) and a foundational test set (20%, 62 samples). The training sets were subjected to five different algorithms: logistic regression, decision tree, random forest, gradient boosting, and support vector.</div></div><div><h3>Results</h3><div>309 patients were selected; 149 exhibited a negative IFE and 160 a positive IFE for monoclonality. The evaluation of the five tested models demonstrated very good performance, the chosen model was Random Forest for its high sensitivity (85%) and area under the receiver operating characteristic curve (91%).</div></div><div><h3>Conclusion</h3><div>An accurate algorithm was achieved for predicting the presence of M protein when the β-globulin fraction is elevated which enables early and improved diagnosis of monoclonal gammopathy.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110892"},"PeriodicalIF":2.5,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143122467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Oxidative stress and obesity are associated with endothelial dysfunction and subclinical atherosclerosis in adolescents","authors":"Josiane Aparecida de Miranda ,&nbsp;Warlley Rosa Cunha ,&nbsp;Júlio César Moraes Lovisi ,&nbsp;Carla Márcia Moreira Lanna ,&nbsp;Lucas Cézar Pinheiro ,&nbsp;Riccardo Lacchini ,&nbsp;José Eduardo Tanus-Santos ,&nbsp;Vanessa de Almeida Belo","doi":"10.1016/j.clinbiochem.2025.110889","DOIUrl":"10.1016/j.clinbiochem.2025.110889","url":null,"abstract":"<div><h3>Objectives</h3><div>This study explores the relationship between obesity, endothelial dysfunction, and the critical role of oxidative stress biomarkers in subclinical atherosclerosis.</div></div><div><h3>Design &amp; methods</h3><div>The study included 114 adolescents aged 12–17 years from Juiz de Fora, Brazil, divided into 40 individuals with obesity and 74 controls. Physical and biochemical assessments were conducted, including measurements of Brachial Flow-Mediated Dilation (BFMD), Carotid Intima-Media Thickness (IMT), and oxidative biomarkers such as nitrite, nitrate, and 8-isoprostane. Multiple regression analyses were used to evaluate associations between obesity, oxidative biomarkers, and endothelial function.</div></div><div><h3>Results</h3><div>Adolescents with obesity exhibited significantly reduced BFMD at 60 s (5.44 ± 2.31 % vs. 7.82 ± 2.07 % in controls; p &lt; 0.05) and 90 s (5.27 ± 2.64 % vs. 7.93 ± 2.12 % in controls; p &lt; 0.05). IMT was significantly higher in the group with obesity for both the right carotid artery (0.054 ± 0.005 cm vs. 0.047 ± 0.004 cm in controls; p &lt; 0.05) and the left carotid artery (0.053 ± 0.005 cm vs. 0.047 ± 0.004 cm in controls; p &lt; 0.05). Additionally, 8-isoprostane levels were higher in adolescents with obesity (49.75 ± 22.62 pg/mL vs. 42.36 ± 17.35 pg/mL in controls; p &lt; 0.05), indicating increased oxidative stress. Nitrite levels were significantly lower in adolescents with obesity (42.98 ± 10.62 nM vs. 49.94 ± 17.71 nM in controls; p &lt; 0.05). Additionally, nitrate levels were inversely associated with IMT in both the right (p = 0.01) carotid arteries in the multiple linear regression analyses.</div></div><div><h3>Conclusions</h3><div>The study highlights the association between obesity and early vascular changes in adolescents, evidenced by reduced BFMD, increased IMT, and altered oxidative stress biomarkers.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110889"},"PeriodicalIF":2.5,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143051649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of an automated assay for eosinophil-derived neurotoxin in serum","authors":"Carley Karsten ,&nbsp;Theodore Stier ,&nbsp;Christina Wood-Wentz ,&nbsp;Carin Smith ,&nbsp;Yifei K. Yang ,&nbsp;Melissa Snyder","doi":"10.1016/j.clinbiochem.2025.110890","DOIUrl":"10.1016/j.clinbiochem.2025.110890","url":null,"abstract":"<div><h3>Introduction</h3><div>Eosinophil-derived neurotoxin (EDN) is a promising biomarker for eosinophil activation during inflammatory responses. Here we evaluate the analytical performance of an automated fluorescence enzyme immunoassay for EDN in serum and explore its relationship with eosinophil counts in both healthy participants and those with eosinophilic conditions.</div></div><div><h3>Materials and Methods</h3><div>Paired serum samples were collected from individuals for whom a complete blood count with differential was ordered. EDN was measured using the ImmunoCAP EDN Assay Kit (research use only, Phadia AB / provided by Thermo Fisher Scientific) and 40 samples were also measured using an ELISA kit (research use only, ALPCO).</div></div><div><h3>Results</h3><div>The analytical measurement range of the ImmunoCAP assay was 2.6–200 µg/L. The imprecision across different EDN concentrations was ≤ 7.0 %. Stability and preanalytical requirements were determined. To minimize ex vivo degranulation and false elevation of EDN levels, serum should be removed from the cell pellet immediately after centrifugation. There was strong correlation for EDN measurements between ImmunoCAP and the comparative ELISA (r = 0.974), although a significant bias was observed. A 95th percentile reference range in 180 presumed healthy adults was calculated at 101 µg/L. Overall EDN was significantly higher in serum from patients with elevated circulating eosinophil counts (median = 120.0; <em>P</em> &lt; 0.0001). However, individual patients may present with discordant presentation of eosinophil counts and EDN concentration.</div></div><div><h3>Conclusions</h3><div>Together these results demonstrate that the ImmunoCAP EDN Assay Kit can reliably measure EDN in serum and may be useful for the evaluation of patients with conditions associated with hypereosinophilia.</div></div>","PeriodicalId":10172,"journal":{"name":"Clinical biochemistry","volume":"136 ","pages":"Article 110890"},"PeriodicalIF":2.5,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143045704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}