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Clinical Biochemistry

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https://www.readbyqxmd.com/read/28648695/the-usefulness-of-advanced-lipid-and-oxidative-stress-testing-for-diagnosis-and-management-of-low-hdl-cholesterol-phenotype-a-case-report
#1
Vladimir Kuburovic, Jelena Vekic, Aleksandra Zeljkovic, Alain Carrie, Jelena Kotur-Stevuljevic, Dragana Bojanin, Jovan Kosutic, Vesna Spasojevic-Kalimanovska, Milica Miljkovic, Nina Kuburovic, Philippe Couvert
OBJECTIVE: Plasma high-density lipoprotein cholesterol (HDL-C) level is a strong inverse predictor of cardiovascular disease (CVD) development. Tangier disease, a consequence of mutations in the ATP binding cassette transporter 1 (ABCA1) gene, is associated with very low HDL-C levels. Still, the relationship between Tangier disease and CVD is not always evident. The study investigates usefulness of lipoprotein subfractions, oxidative stress and paraoxonase 1 (PON1) status assessment for evaluation and management of patient with low HDL-C phenotype...
June 22, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28647526/national-survey-of-adult-and-pediatric-reference-intervals-in-clinical-laboratories-across-canada-a-report-of-the-cscc-working-group-on-reference-interval-harmonization
#2
Khosrow Adeli, Victoria Higgins, David Seccombe, Christine P Collier, Cynthia Balion, George Cembrowski, Allison A Venner, Julie Shaw
OBJECTIVE: Reference intervals are widely used decision-making tools in laboratory medicine, serving as health-associated standards to interpret laboratory test results. Numerous studies have shown wide variation in reference intervals, even between laboratories using assays from the same manufacturer. Lack of consistency in either sample measurement or reference intervals across laboratories challenges the expectation of standardized patient care regardless of testing location. Here, we present data from a national survey conducted by the Canadian Society of Clinical Chemistry (CSCC) Reference Interval Harmonization (hRI) Working Group that examines the variation in laboratory reference sample measurements, as well as pediatric and adult reference intervals currently used in clinical practice across Canada...
June 21, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28645720/direct-circulating-tumor-dna-detection-from-unpurified-plasma-using-a-digital-pcr-platform
#3
David Sefrioui, Ludivine Beaussire, Anne Perdrix, Florian Clatot, Pierre Michel, Thierry Frebourg, Frédéric Di Fiore, Nasrin Sarafan-Vasseur
BACKGROUND: In standard pre-analytical conditions, an isolation step is required for circulating tumor DNA (ctDNA) analysis. The need for this step remains unclear with the development of ultrasensitive detection technologies such as digital PCR (dPCR). The aim of our study was to evaluate the ctDNA detection by dPCR platform either directly from plasma (plasma group, PG) or after an isolation step (isolation group, IG). METHODS: We included 17 patients corresponding to a selection of 43 blood samples in metastatic colorectal cancer patients...
June 20, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28624482/nmr-quantification-of-trimethylamine-n-oxide-in-human-serum-and-plasma-in-the-clinical-laboratory-setting
#4
Erwin Garcia, Justyna Wolak-Dinsmore, Zeneng Wang, Xinmin S Li, Dennis W Bennett, Margery A Connelly, James D Otvos, Stanley L Hazen, Elias J Jeyarajah
BACKGROUND AND OBJECTIVES: Trimethylamine-N-oxide (TMAO) produced by gut microbiota metabolism of dietary choline and carnitine has been shown to be associated with increased risk of cardiovascular disease (CVD) and to provide incremental clinical prognostic utility beyond traditional risk factors for assessing a patient's CVD risk. The aim of this study was to develop an automated nuclear magnetic resonance (NMR) spectroscopy assay for quantification of TMAO concentration in serum and plasma using a high-throughput NMR clinical analyzer...
June 14, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28624481/mir-34a-overexpression-predicts-poor-prognostic-outcome-in-colorectal-adenocarcinoma-independently-of-clinicopathological-factors-with-established-prognostic-value
#5
Stamatia-Maria Rapti, Christos K Kontos, Spyridon Christodoulou, Iordanis N Papadopoulos, Andreas Scorilas
OBJECTIVES: MicroRNA-34a (miR-34a) is regulated by TP53 and, in response, downregulates the expression of a gamut of protein-coding genes, including apoptosis regulators, transcription factors, cyclins, and cyclin-dependent kinases. Its upregulation initiates a reprogramming of gene expression and promotes apoptosis. The purpose of this study was the investigation of the potential clinical significance of miR-34a as a molecular prognostic biomarker in colorectal adenocarcinoma using an in-house real-time quantitative PCR (qPCR) methodology...
June 14, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28614696/clinical-utility-of-single-molecule-counting-technology-for-quantification-of-kim-1-in-patients-with-heart-failure-and-chronic-kidney-disease
#6
Jennifer Miao, Eitan Friedman, Alan H B Wu, John A Todd, Joel Estis, Xiaomei Xu, Niamh Nolan, Jeffrey J Bishop, Daniel J Lenihan
BACKGROUND: Acute kidney injury (AKI) is associated with high morbidity and mortality, and may lead to chronic kidney disease (CKD). Traditional serum biomarkers for acute and chronic renal dysfunction are insensitive and nonspecific. While urinary kidney injury molecule-1 (KIM-1) is a sensitive and specific measure of kidney tubular injury, it is difficult to obtain in acute settings. Thus, our objective was to develop a highly sensitive immunoassay for plasma KIM-1. METHODS: A novel plasma KIM-1 immunoassay was developed using Single Molecule Counting technology (SMC)...
June 11, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28599787/anti-cd26-autoantibodies-are-involved-in-rheumatoid-arthritis-and-show-potential-clinical-interest
#7
Oscar J Cordero, Rubén Varela-Calviño, Tania López-González, Milica Grujic, Zorica Juranic, Coral Mouriño, Íñigo Hernández-Rodríguez, Marina Rodríguez-López, Bruno Aspe de la Iglesia, José María Pego-Reigosa
OBJECTIVES: Rheumatoid arthritis (RA) patients show low serum levels of the Ag dipeptidyl peptidase IV (DPP-IV/CD26), both soluble CD26 (sCD26) concentration and its DPP-IV activity. The aim of this study was to test if anti-DPP-IV/CD26 Abs (Anti-CD26) cleared sCD26. DESIGN & METHODS: Serum Anti-CD26 and Total titers (as comparison) of isotypes IgA, IgM and IgG as well as sCD26 concentration and DPP-IV activity were measured in a cohort of RA patients undergoing different biological and non-biological therapies (n=105) and controls (n=50)...
June 6, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28583435/the-bd-barricor-blood-collection-tube-is-an-acceptable-and-robust-alternative-to-the-pst-for-use-with-the-beckman-accutni-3-assay
#8
Anna K Füzéry, Joshua E Raizman, Bobbi Lynn Goudreau, Karin Moses, Keri Niemann, Janice Park, George S Cembrowski
OBJECTIVES: BD Canada recently released a blood collection tube with a novel mechanical separator called the Barricor. We evaluated this tube as an alternate sample type for cardiac troponin I (cTnI) testing using the Beckman Coulter AccuTnI+3 assay. DESIGN AND METHODS: 3014 paired patient specimens (Barricor, plasma separator tube or PST) were obtained from the emergency departments and cardiac care units of nine hospitals in and around Edmonton, Alberta. After centrifugation, each plasma sample was analyzed for cTnI using the Beckman Coulter AccuTnI+3 assay...
June 3, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28583436/serum-levels-of-fatty-acid-binding-protein-4-and-fat-metabolic-markers-in-relation-to-catecholamines-following-exercise
#9
Tatsuya Iso, Hiroaki Sunaga, Hiroki Matsui, Shu Kasama, Naomi Oshima, Hikari Haruyama, Nozomi Furukawa, Kiyomi Nakajima, Tetsuo Machida, Masami Murakami, Tomoyuki Yokoyama, Masahiko Kurabayashi
BACKGROUND: Lipolysis is stimulated by activation of adrenergic inputs to adipose tissues. Our recent study showed that serum concentrations of fatty acid binding protein 4 (FABP4) are robustly elevated in patients with acute myocardial infarction and ventricular tachyarrhythmia, that display a marked activation of the sympathetic nervous system (SNS). However, it remains unknown whether circulating FABP4 concentrations are associated with exercise-induced SNS activation. METHODS: Thirty one healthy volunteers underwent cardiopulmonary exercise testing on a cycle ergometer up to the workload levels below and above anaerobic threshold, low- and high-intensity exercise, respectively...
June 2, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28579339/prognostic-value-of-alkaline-phosphatase-in-patients-with-acute-coronary-syndromes
#10
Gjin Ndrepepa, Stefan Holdenrieder, Erion Xhepa, Salvatore Cassese, Massimiliano Fusaro, Karl-Ludwig Laugwitz, Heribert Schunkert, Adnan Kastrati
OBJECTIVES: The objective of the study was to investigate the association between alkaline phosphatase (AP) activity and prognosis of patients with acute coronary syndrome (ACS). DESIGN AND METHODS: The study included 2134 patients with ACS undergoing percutaneous coronary intervention. All included patients had baseline AP measurements available. The receiver operating characteristic curve analysis showed that the best cut-off of AP for mortality prediction was 98...
June 1, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28578095/pseudohypophosphatemia-associated-with-high-dose-liposomal-amphotericin-b-therapy
#11
James A Mays, Dina N Greene, Anne Poon, Anna E Merrill
BACKGROUND: Hypophosphatemia is commonly observed in critically ill patients. Inorganic phosphorus is quantified by spectrophotometric measurement of a phosphomolybdate complex, a method with multiple documented interferents. Our clinical laboratory was contacted to investigate a case of asymptomatic hypophosphatemia in a patient receiving high-dose liposomal amphotericin B therapy (L-AMB). METHODS: In vitro experiments were performed by spiking L-AMB into residual plasma specimens...
May 31, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28571971/biological-reproducibility-of-circulating-p-selectin-thrombopoietin-gpiib-iiia-and-thrombomodulin-over-one-year
#12
Mirja E Graf, Disorn Sookthai, Theron Johnson, Ruth Schübel, Verena Katzke, Peter Bugert, Michael Hoffmeister, Rudolf Kaaks, Tilman Kühn
BACKGROUND: Enhanced platelet activation has been implicated in several pathophysiological processes. Here, we evaluated the biological reproducibility of circulating P-Selectin, Thrombomodulin (TM), Thrombopoietin (TPO), and Glycoprotein IIb/IIIa (GPIIb/IIIa) to assess whether these analytes can be used as reliable biomarkers of platelet activation in epidemiological studies. METHODS: We measured circulating P-Selectin, TM, TPO and GPIIb/IIIa by immunoassays in two blood samples of 78 participants of the EPIC Heidelberg study (47-80years, 50% female) that were collected one year apart...
May 29, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28571970/oxidative-imbalance-in-low-intermediate-1-risk-myelodysplastic-syndrome-patients-the-influence-of-iron-overload
#13
David Ivars, María Teresa Orero, Karla Javier, Laura Díaz-Vico, José Luis García-Giménez, Salvador Mena, Carmen Tormos, Mercedes Egea, Pedro Luis Pérez, Beatriz Arrizabalaga, María Ángeles Ruiz, Nuria Yagüe, Mar Tormo, Reyes Sancho-Tello, Angela Gomes, Carmen Algueró, José Enrique O'Connor, Guillermo T Sáez, Félix Carbonell, Rosa Collado
OBJECTIVE: To assess the generation of reactive oxygen species (ROS) and the involvement of the main antioxidant pathways in low/intermediate-1-risk myelodysplastic syndromes (MDS) with iron overload (IOL). METHODS: We examined the levels of superoxide anion (O2(-)), hydrogen peroxide (H2O2), antioxidants (glutathione, GSH; superoxide dismutase, SOD; catalase, CAT; and glutathione peroxidase, GPx), mitochondrial membrane potential (ΔΨm), and by-products of oxidative damage (8-isoprostanes and 8-oxo-7,8-dihydro-2'-deoxyguanosine, 8-oxo-dG) in 42 MDS patients (28 without IOL at diagnosis, and 14 who developed IOL) and 20 healthy subjects...
May 29, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28552399/evaluation-of-lactate-white-blood-cell-count-neutrophil-count-procalcitonin-and-immature-granulocyte-count-as-biomarkers-for-sepsis-in-emergency-department-patients
#14
Brad S Karon, Nicole V Tolan, Amy M Wockenfus, Darci R Block, Nikola A Baumann, Sandra C Bryant, Casey M Clements
BACKGROUND: Lactate, white blood cell (WBC) and neutrophil count, procalcitonin and immature granulocyte (IG) count were compared for the prediction of sepsis, and severe sepsis or septic shock, in patients presenting to the emergency department (ED). METHODS: We prospectively enrolled 501 ED patients with a sepsis panel ordered for suspicion of sepsis. WBC, neutrophil, and IG counts were measured on a Sysmex XT-2000i analyzer. Lactate was measured by i-STAT, and procalcitonin by Brahms Kryptor...
May 25, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28551332/association-between-thyroid-hormones-and-trail
#15
Stella Bernardi, Fleur Bossi, Barbara Toffoli, Fabiola Giudici, Alessandra Bramante, Giulia Furlanis, Elisabetta Stenner, Paola Secchiero, Giorgio Zauli, Renzo Carretta, Bruno Fabris
INTRODUCTION: Recent studies suggest that a circulating protein called TRAIL (TNF-related apoptosis-inducing ligand) might have a role in the regulation of body weight and metabolism. Interestingly, thyroid hormones seem to increase TRAIL tissue expression. This study aimed at evaluating whether overt thyroid disorders affected circulating TRAIL levels. METHODS: TRAIL circulating levels were measured in euthyroid, hyperthyroid, and hypothyroid patients before and after thyroid function normalization...
May 25, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28551333/74-year-old-female-with-new-monoclonal-protein-on-serum-immunofixation-electrophoresis
#16
Odise Cenaj, Jayme L Dahlin, Dulce M Buencamino, Jacob P Laubach, Petr Jarolim
No abstract text is available yet for this article.
May 24, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28512013/evaluation-of-the-n-latex-serum-free-light-chain-assay-on-the-siemens-bnii-analyzer-and-agreement-with-the-binding-site-freelite-assay-on-the-spaplus
#17
Nicole M A White-Al Habeeb, Tammy Earle, Megan Spencer, Ivan M Blasutig
OBJECTIVES: To evaluate the Siemens N-latex kappa free light chain (κFLC) and lambda FLC (λFLC) assays on the BNII nephelometer and assess agreement with The Binding Site Freelite FLC assays on the SPAPlus. DESIGN AND METHODS: Over 180 patient serum samples from routine analysis of κFLC and λFLC measured by the Freelite assay were collected for the study and measured with the N-latex κFLC and λFLC assays to assess precision, linearity, method comparison and dilutional effects...
May 13, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28499801/the-effect-of-admission-serum-potassium-levels-on-in-hospital-and-long-term-mortality-in-type-a-acute-aortic-dissection
#18
Zhaoran Chen, Bi Huang, Haisong Lu, Zhenhua Zhao, Rutai Hui, Shu Zhang, Yanmin Yang, Xiaohan Fan
BACKGROUND: Mild fluctuations in serum potassium (K(+)) levels are related to the prognosis of cardiovascular disease. This study aimed to determine the effect of admission serum potassium levels on in-hospital and long-term mortality in patients with Stanford type A acute aortic dissection (AAD). MATERIALS AND METHODS: A total of 588 consecutive patients with type A AAD were enrolled, and they were grouped according to admission serum potassium level: <3.5, 3...
May 10, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28495185/association-of-circulatory-asymmetric-dimethylarginine-adma-with-diabetic-nephropathy-in-asian-indians-and-its-causative-role-in-renal-cell-injury
#19
Isaivani Jayachandran, Saravanakumar Sundararajan, Prabu Paramasivam, Balachandar Venkatesan, Shanthirani C Subramanian, Muthuswamy Balasubramanyam, Viswanathan Mohan, Nagaraj Manickam
AIM: Asymmetric dimethylarginine (ADMA) is involved in the regulation of nitric oxide synthesis and in the maintenance of vascular tone and structure. But the role and status of ADMA in diabetes induced kidney injury is not clear. Hence this study is investigating the role of ADMA in the progression of kidney injury and its circulatory status in Asian Indians with and without diabetic nephropathy. METHODS: Recruited study subjects were divided into normal glucose tolerance (NGT), type 2 diabetes mellitus (T2DM) and T2DM with micro or macroalbuminuria...
May 8, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28483407/evaluation-of-diagnostic-accuracy-of-two-rapid-stool-antigen-tests-using-an-immunochromatographic-assay-to-detect-helicobacter-pylori
#20
Joyce Matie Kinoshita da Silva-Etto, Rejane Mattar, Cibele Aparecida Villares-Lopes, Sergio Barbosa Marques, Flair José Carrilho
OBJECTIVES: The stool antigen assay for H. pylori infection diagnosis with monoclonal antibodies is a simple and recommended technique by the Maastricht V/Florence consensus report. Recently, Pylori K-Set K-1219 (Coris Bioconcept Sprl, Belgium) and HP-F23 (Symbiosys, Brazil) have been made commercially available in Brazil. Thus, the aim of this study was to evaluate the diagnostic accuracies of these two rapid stool antigen tests by immunochromatographic assays (index tests) for the clinical practice...
May 5, 2017: Clinical Biochemistry
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