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Clinical Biochemistry

Júlia Dauernheimer Machado, Eduardo Guimarães Camargo, Roberta Boff, Laís da Silva Rodrigues, Joíza Lins Camargo, Ariana Aguiar Soares, Sandra Pinho Silveiro
AIM: To evaluate the accuracy of creatinine and cystatin C (cysC) equations to estimate glomerular filtration rate (GFR) in type 2 diabetes mellitus (DM) patients and healthy adults. METHODS: Case-control study including 84 patients with type 2 DM and 100 healthy adults with measured GFR (mGFR)≥60mL/min/1.73m2. GFR was measured by 51Cr-EDTA and estimated (eGFR) by the following equations using creatinine, cysC or both markers: Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI), Caucasian Asian Pediatrics and Adults (CAPA), CKD-EPI creatinine-cystatin C (CKDEPI-CC), and CKD-EPI cystatin C (CKDEPIcysC)...
January 10, 2018: Clinical Biochemistry
Nicole Jenkins, Marion Black, Hans G Schneider
INTRODUCTION: Invasive fungal infections are an increasing cause of mortality and morbidity in high risk patient populations such as those on immunosuppressive therapy. Triazole antifungals are recommended for the prevention and treatment of such infections. The aim of this study was to develop and validate a simple, sensitive and robust LCMS/MS method for the simultaneous analysis in human plasma of three frequently used antifungal drugs: voriconazole, posaconazole, and itraconazole...
January 8, 2018: Clinical Biochemistry
Victoria Higgins, Dorothy Truong, Amy Woroch, Man Khun Chan, Houman Tahmasebi, Khosrow Adeli
BACKGROUND: Evidence-based reference intervals (RIs) are essential to accurately interpret pediatric laboratory test results. To fill gaps in pediatric RIs, The Canadian Laboratory Initiative on Pediatric Reference Intervals (CALIPER) project developed an age- and sex-specific pediatric RI database based on healthy pediatric subjects. Originally established for Abbott ARCHITECT assays, CALIPER RIs were transferred to assays on Beckman, Roche, Siemens, and Ortho analytical platforms. This study provides transferred reference intervals for 29 biochemical assays for the Ortho VITROS 5600 Chemistry System (Ortho)...
January 4, 2018: Clinical Biochemistry
Sadia Atif Ahmad, Muhammad Aamir, Manzoor Ahmad, Mawish Javed, Attiq Memon
No abstract text is available yet for this article.
January 4, 2018: Clinical Biochemistry
Maria Lorubbio, Andrea A Conti, Agostino Ognibene
No abstract text is available yet for this article.
January 3, 2018: Clinical Biochemistry
Gabriela Pasqualim, Bruna Almeida Dos Santos, Roberto Giugliani, Ursula Matte
BACKGROUND: Fabry disease (FD [MIM: 301500]) is a disorder caused by mutations in the alpha-galactosidase gene (GLA), which presents great allelic heterogeneity. The development of fast screening methods may reduce costs and length of diagnosis, being particularly important for screening programs of high-risk female patients. Therefore, the purpose of this study was to develop a pre-sequencing genetic screening method based on high resolution melting (HRM) analysis. METHODS: We performed HRM analysis in one hundred and three individuals, 79 females and 24 males, with a total of 27 different variants in 30 different genotypes...
January 3, 2018: Clinical Biochemistry
Brad S Karon, Amy M Wockenfus, Katherine J Hartung, Renee J Scott, Steven D Carter, Allan S Jaffe
OBJECTIVES: We compared rates of analytical outliers, and percent of emergency department (ED) patients with cardiac troponin (cTn) values above the 99th percentile upper reference limit (URL), for two conventional and one high sensitivity cTn assay. METHODS: We measured 3008 samples from 1931 ED patients by Roche e411 4th generation Troponin T (cTnT); and Abbott STAT Troponin I (cTnI) and high sensitivity troponin I (hscTnI) on an Architect i2000. Within 24h of initial measurement, samples were aliquoted, re-centrifuged, and repeated in duplicate by all methods...
January 2, 2018: Clinical Biochemistry
Katerina K Naka, Katerina Papathanassiou, Aris Bechlioulis, Konstantinos Pappas, Stelios Tigas, Dimitrios Makriyiannis, Sophia Antoniou, Nikolaos Kazakos, Alexandra Margeli, Ioannis Papassotiriou, Agathocles Tsatsoulis, Lampros K Michalis
BACKGROUND: The pathophysiology of atherosclerosis in type 2 diabetes mellitus (T2DM) is multifactorial. The association of vascular indices with circulating biomarkers of inflammation and insulin resistance and their role in the long-term cardiovascular prognosis in T2DM patients were currently investigated. PATIENTS AND METHODS: Patients with T2DM and poor glycemic control without known cardiovascular diseases (n=119) at baseline were enrolled and followed for about 9years...
December 27, 2017: Clinical Biochemistry
Ian Marie Lano, Andrew W Lyon, Li Wang, Rob Ruskin, Martha E Lyon
BACKGROUND: Clinically significant variation has been reported within and between plasma and whole blood total bilirubin methods used to identify neonates for whom clinical intervention for hyperbilirubinemia may be required. OBJECTIVE: To evaluate total bilirubin measurements between the Radiometer whole blood co-oximeter and plasma bilirubin methods from Roche Diagnostics and Ortho Clinical Diagnostics using neonatal specimens. METHODS: Total bilirubin levels were analyzed by whole blood co-oximetry (Radiometer® ABL90)...
December 20, 2017: Clinical Biochemistry
Simeon-Pierre Choukem, Tasha Manases, Jean-Pierre Nda-Mefo, Christian Akem Dimala, Yannick Mboue-Djieka, Eugene Sobngwi, Andre-Pascal Kengne
BACKGROUND: Low density lipoprotein cholesterol (LDL-C) levels are used to estimate cardiovascular disease (CVD) risk and to guide prescriptions. To circumvent the challenges of direct LDL-C measurement, guidelines recommend the use of Friedewald formula derived LDL-C levels. Despite reported limitations of this formula, its validity in sub-Saharan Africans has not been adequately investigated. OBJECTIVE: To assess the validity of the Friedewald formula derived against directly (homogeneous) measured LDL-C in adult Cameroonians...
December 19, 2017: Clinical Biochemistry
Ahmed A Almousa, Marc Morris, Sharyle Fowler, Jennifer Jones, Jane Alcorn
OBJECTIVES: Endoscopy remains the gold standard to diagnose and evaluate inflammatory bowel disease (IBD) activity. Current biomarkers or their combinations cannot adequately predict IBD risk, diagnosis, progression or relapse, and response to therapy. Pyruvate kinase M2 (PKM2) is emerging as a significant mediator of the inflammatory process. We aim to assess levels of serum PKM2 in healthy and newly diagnosed IBD patients and its relationship with IBD indices and microbiota changes...
December 19, 2017: Clinical Biochemistry
Raphael Twerenbold, Jasper Boeddinghaus, Thomas Nestelberger, Karin Wildi, Maria Rubini Gimenez, Patrick Badertscher, Christian Mueller
High-sensitivity cardiac troponin (hs-cTn) assays have been used clinically by thousands of physicians in many countries throughout the world since their clinical introduction seven years ago. In the early diagnosis of myocardial infarction (MI), beyond doubt the most important indication of hs-cTn assays, these simple, inexpensive and highly reproducible tools complement detailed clinical assessment including chest pain characteristics and the electrocardiogram. Hs-cTn assays for the first time allowed the precise quantification of cardiomyocyte injury around the 99th percentile and thereby substantially increased the accuracy of MI detection from blood obtained at presentation to the emergency department (ED)...
December 16, 2017: Clinical Biochemistry
Valdelena Alessandra da Silva, Robson José de Almeida, Marcele Pimenta Cavalcante, Lucio Antonio Pereira Junior, Francine Machado Reis, Mariana Fabbris Pereira, Teresa S Kasamatsu, Cleber P Camacho
Thyroid Stimulating Hormone (TSH) levels are related to the pituitary gland's ability to detect thyroid hormone concentration. Many studies have analyzed the correlation between TSH and T4, demonstrating a complex system correlation. This complex system may vary among different TSH levels and patients. OBJECTIVES: The main purpose of this study is to assess the correlation and agreement of serum TSH measured with two assays in different settings. DESIGN & METHODS: We evaluated healthy individuals as well as subclinical or overt hypothyroid patients...
December 15, 2017: Clinical Biochemistry
Tomoyuki Kawada
No abstract text is available yet for this article.
December 14, 2017: Clinical Biochemistry
Michael Levi, Camilla Hjelm, Florencia Harari, Marie Vahter
No abstract text is available yet for this article.
December 9, 2017: Clinical Biochemistry
Guilaine Boursier, Ariane Sultan, Nicolas Molinari, Laurent Maimoun, Catherine Boegner, Marion Picandet, Nils Kuster, Anne-Sophie Bargnoux, Stéphanie Badiou, Anne-Marie Dupuy, Jean-Paul Cristol, Antoine Avignon
OBJECTIVE: Assessment of insulin resistance (IR) is essential in non-diabetic patients with obesity. Thus study aims to identify the best determinants of IR and to propose an original approach for routine assessment of IR in obesity. DESIGN AND PATIENTS: All adult with obesity defined by a body mass index ≥30kg/m2, evaluated in the Nutrition Department between January 2010 and January 2015 were included in this cross-sectional study. Patients with diabetes were excluded...
December 7, 2017: Clinical Biochemistry
Jie-Wen Tan, Fang Zhang, He-Jun Liu, Zhuo Li
OBJECTIVE: This is a retrospective study to assess the therapeutic effect of hyperbaric oxygen (HBO) in early treatment of acute spinal cord injury (SCI) using magnetic resonance imaging (MRI) and electrophysiology in diagnosing. METHODS: Forty acute SCI patients from Sun Yat-Sen Memorial Hospital who were assigned into HBO treatment were included during August 2013 to October 2014.The patients with adverse reactions or contraindications for HBO were assigned as controls...
December 5, 2017: Clinical Biochemistry
Ragnhild V Nome, Trine Bjøro, Elisabeth Paus, Johan Bjerner, Sophie D Fosså, Rita Steen, Kjell Nustad, Nils Bolstad
BACKGROUND: Human Chorionic Gonadotropin (hCG) is produced by germ cell tumors, but can also be elevated in benign conditions such as primary hypogonadism, where hCG is produced by the pituitary gland. In our experience, the reference limits for hCG (Elecsys hCG+β-assay, Roche Diagnostics), were unnecessarily high and did not reflect levels encountered in clinical practice. We wanted to establish new reference limits to increase the clinical utility of the hCG-assay. METHODS: We analysed hCG in serum samples from a healthy adult population and in a cohort of testicular cancer survivors...
December 2, 2017: Clinical Biochemistry
Miguel A Frias, Julien Virzi, Olivier Golaz, Baris Gencer, François Mach, Nicolas Vuilleumier
OBJECTIVES: To determine the impact of long distance rowing (160km, nonstop) on standard biological parameters and to study the relation between inflammation, myocardial necrosis, lipid profile, heart rate and energy expenditure. METHODS: Electrolytes, lipid profile, C-reactive protein (CRP), interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-α), procalcitonin (PCT), high-sensitive troponin T (hs-cTnT), and N-terminal pro-brain natriuretic peptide (NT-proBNP), were measured on non-fasting venous blood samples collected 8h before and after the rowing race on five healthy competitors...
November 30, 2017: Clinical Biochemistry
Simonetta Picone, Alberto Ritieni, Adele Fabiano, Giulia Graziani, Piermichele Paolillo, Giovanni Livolti, Fabio Galvano, Diego Gazzolo
BACKGROUND: Lutein (LT) is a naturally occurring xanthophyll carotenoid most predominant in the central nervous system (CNS), but its neurotrophic role is still debated. We therefore investigated whether cord blood concentrations correlated with a well-established neurobiomarker, namely activin A. METHODS: We conducted a prospective study on the distribution of LT and activin A in arterial cord blood of healthy preterm (n=50) and term (n=82) newborns according to weeks of gestational age (wGA) and gender...
November 28, 2017: Clinical Biochemistry
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