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Clinical Chemistry and Laboratory Medicine: CCLM

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https://www.readbyqxmd.com/read/28107172/estimation-of-the-reference-interval-for-serum-folate-measured-with-assays-traceable-to-the-who-international-standard
#1
Simona Ferraro, Andrea Panzeri, Simona Borille, Dominika Szoke, Mauro Panteghini
No abstract text is available yet for this article.
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107171/the-relationship-between-vacuum-and-hemolysis-during-catheter-blood-collection-a-retrospective-analysis-of-six-large-cohorts
#2
Cornelia Mrazek, Ana-Maria Simundic, Helmut Wiedemann, Florian Krahmer, Thomas Klaus Felder, Ulrike Kipman, Uta Hoppe, Elisabeth Haschke-Becher, Janne Cadamuro
BACKGROUND: Blood collection through intravenous (IV) catheters is a common practice at emergency departments (EDs). This technique is associated with higher in vitro hemolysis rates and may even be amplified by the use of vacuum collection tubes. Our aim was to investigate the association of five different vacuum tubes with hemolysis rates in comparison to an aspiration system under real-life conditions and to propose an equation to estimate the amount of hemolysis, depending on the vacuum collection tube type...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107170/hb-variants-in-korea-effect-on-hba1c-using-five-routine-methods
#3
Yeo-Min Yun, Misuk Ji, Dae-Hyun Ko, Sail Chun, Gye Cheol Kwon, Kyunghoon Lee, Sang Hoon Song, Moon Woo Seong, Sung Sup Park, Junghan Song
BACKGROUND: Quantification of glycated hemoglobin (HbA1c) is a challenge in patients with hemoglobin (Hb) variants. We evaluated the impact of various Hb variants on five routine HbA1c assays by comparing with the IFCC reference measurement procedure (RMP). METHODS: Whole blood samples showing warning flags or no results on routine HPLC HbA1c assays were confirmed for Hb variants and were submitted to HbA1c quantification using Sebia Capillarys 2 Flex Piercing, Roche Tina-quant HbA1c Gen...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107169/genetic-diagnosis-of-%C3%AE-1-antitrypsin-deficiency-using-dna-from-buccal-swab-and-serum-samples
#4
Irene Belmonte, Miriam Barrecheguren, Cristina Esquinas, Esther Rodríguez, Marc Miravitlles, Francisco Rodríguez-Frías
BACKGROUND: α1-Antitrypsin deficiency (AATD) is associated with a high risk of developing lung and liver disease. Despite being one of the most common hereditary disorders worldwide, AATD remains under-diagnosed and prolonged delays in diagnosis are usual. The aim of this study was to validate the use of buccal swab samples and serum circulating DNA for the complete laboratory study of AATD. METHODS: Sixteen buccal swab samples from previously characterized AATD patients were analyzed using an allele-specific genotyping assay and sequencing method...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107168/the-natriuretic-peptide-mr-proanp-predicts-all-cause-mortality-and-adverse-outcome-in-community-patients-a-10-year-follow-up-study
#5
Jonas Odermatt, Lara Hersberger, Rebekka Bolliger, Lena Graedel, Mirjam Christ-Crain, Matthias Briel, Heiner C Bucher, Beat Mueller, Philipp Schuetz
BACKGROUND: The precursor peptide of atrial natriuretic peptide (MR-proANP) has a physiological role in fluid homeostasis and is associated with mortality and adverse clinical outcomes in heart failure patients. Little is known about the prognostic potential of this peptide for long-term mortality prediction in community-dwelling patients. We evaluated associations of MR-proANP levels with 10-year all-cause mortality in patients visiting their general practitioner for a respiratory tract infection...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107167/activity-of-the-liver-enzyme-ornithine-carbamoyltransferase-otc-in-blood-lc-ms-ms-assay-for-non-invasive-diagnosis-of-ornithine-carbamoyltransferase-deficiency
#6
Jakub Krijt, Jitka Sokolová, Pavel Ješina, Lenka Dvořáková, Martin Řeboun, Katarína Brennerová, Martin Mistrík, Jiří Zeman, Tomáš Honzík, Viktor Kožich
BACKGROUND: Liver enzymes are released from hepatocytes into circulation and their activity can be measured in the blood. We examined whether the plasma activity of the liver enzyme ornithine carbamoyltransferase, determined by a novel liquid chromatography-mass spectrometry (LC-MS/MS) assay, could be utilized for the detection of OTC deficiency (OTCD), an X-linked inborn error of the urea cycle. METHODS: The plasma ornithine carbamoyltransferase (OTC) activity was assayed in the reverse reaction using isotopically labeled citrulline-d4 as a substrate and by determination of the product, ornithine-d4, by LC-MS/MS analysis...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28107166/a-new-strategy-for-calculating-the-risk-of-ovarian-malignancy-algorithm-roma
#7
Tae-Dong Jeong, Eun-Jung Cho, Dae-Hyun Ko, Woochang Lee, Sail Chun, Hi Jeong Kwon, Ki-Sook Hong, Yong-Man Kim, Won-Ki Min
BACKGROUND: Reliable quantitative measurements of HE4 and CA125 levels are required to calculate the risk of ovarian malignancy algorithm (ROMA) value. We suggest a new reporting strategy for interpreting ROMA values based on analytical measurement range (AMR) and qualified-intervals of the HE4 and CA125 results. METHODS: HE4 and CA125 assays from Abbott and Roche were used. The AMRs and the qualified-intervals were as follows: Architect HE4 assay, 20-1500 and 17...
January 20, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099122/parathormone-stability-in-hemodialyzed-patients-and-healthy-subjects-comparison-on-non-centrifuged-edta-and-serum-samples-with-second-and-third-generation-assays
#8
Marie-Louise Schleck, Jean-Claude Souberbielle, Pierre Delanaye, Mario Plebani, Etienne Cavalier
BACKGROUND: Parathyroid hormone (PTH) stability is important. Many studies have shown divergent results between EDTA and serum, which are mainly linked to differences in protocols or cut-offs used to determine whether or not PTH remained stable. No studies have yet compared PTH stability as measured by second- and third-generation assays on the same samples in hemodialyzed patients and healthy subjects. METHODS: Five pairs of samples (EDTA and gel tubes) were obtained in 10 hemodialyzed patients before a dialysis session and in 10 healthy subjects...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099121/early-mixed-hematopoietic-chimerism-detection-by-digital-droplet-pcr-in-patients-undergoing-gender-mismatched-hematopoietic-stem-cell-transplantation
#9
Miguel Waterhouse, Dietmar Pfeifer, Marie Follo, Justus Duyster, Henning Schäfer, Hartmut Bertz, Jürgen Finke
BACKGROUND: Clinical decision making after allogeneic stem cell transplantation (HSCT) is partially based on hematopoietic chimerism analysis. Polymerase chain reaction amplification of polymorphic short tandem repeats (STR-PCR) is currently considered the gold standard for chimerism surveillance after transplantation. Nevertheless, this method has shown several limitations. Emerging technologies such as digital PCR (dPCR) has been applied to detect hematopoietic chimerism. Despite previous reports, the clinical usefulness of dPCR is unclear because the studies were performed in limited patient populations with short follow-ups...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099120/the-clinical-significance-of-platelet-microparticle-associated-micrornas
#10
Patrick Provost
Circulating blood platelets play a central role in the maintenance of hemostasis. They adhere to subendothelial extracellular matrix proteins that become exposed upon vessel wall damage, which is followed by platelet activation, further platelet recruitment, platelet aggregation and formation of an occlusive, or non-occlusive, platelet thrombus. Platelets host a surprisingly diverse transcriptome, which is comprised of ~9500 messenger RNAs (mRNAs) and different classes of non-coding RNAs, including microRNAs, as well as a significant repertoire of proteins that contribute to their primary (adhesion, aggregation, granule secretion) and alternative (RNA transfer, mRNA translation, immune regulation) functions...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099119/interference-in-na-measurements-on-the-siemens-rapidpoint%C3%A2-500-after-nortriptyline-intoxication-a-case-report
#11
Eline A E van der Hagen, Kees C J Smeekens, Nils E van 't Veer, Kristel J M Boonen, Antonius A M Ermens
No abstract text is available yet for this article.
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099118/assessment-of-autoantibodies-to-interferon-%C3%AF-in-patients-with-autoimmune-polyendocrine-syndrome-type-1-using-a-new-immunoprecipitation-assay
#12
Maria Del Pilar Larosa, Rachel Mackenzie, Peter Burne, Silvia Garelli, Susi Barollo, Stefano Masiero, Beatrice Rubin, Shu Chen, Jadwiga Furmaniak, Corrado Betterle, Bernard Rees Smith
BACKGROUND: Measurements of autoantibodies to interferon ω (IFN-ω) in patients with autoimmune polyglandular syndrome type 1 (APS-1) were performed using a new immunoprecipitation assay (IPA) based on 125I-labeled IFN-ω. METHODS: We have developed and validated a new IPA based on 125I-labeled IFN-ω. Sera from 78 patients (aged 3-78 years) with clinically diagnosed APS-1, 35 first degree relatives, 323 patients with other adrenal or non-adrenal autoimmune diseases and 84 healthy blood donors were used in the study...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099117/casz1-loss-of-function-mutation-contributes-to-familial-dilated-cardiomyopathy
#13
Xing-Biao Qiu, Xin-Kai Qu, Ruo-Gu Li, Hua Liu, Ying-Jia Xu, Min Zhang, Hong-Yu Shi, Xu-Min Hou, Xu Liu, Fang Yuan, Yu-Min Sun, Jun Wang, Ri-Tai Huang, Song Xue, Yi-Qing Yang
BACKGROUND: The zinc finger transcription factor CASZ1 plays a key role in cardiac development and postnatal adaptation, and in mice, deletion of the CASZ1 gene leads to dilated cardiomyopathy (DCM). However, in humans whether genetically defective CASZ1 contributes to DCM remains unclear. METHODS: The coding exons and splicing junction sites of the CASZ1 gene were sequenced in 138 unrelated patients with idiopathic DCM. The available family members of the index patient harboring an identified CASZ1 mutation and 200 unrelated, ethnically matched healthy individuals used as controls were genotyped for CASZ1...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28099116/determination-of-glucose-6-phosphate-dehydrogenase-cut-off-values-in-a-tunisian-population
#14
Naouel Laouini, Chaima Abdelhafidh Sahli, Latifa Jouini, Sabrine Haloui, Sondes Hadj Fredj, Rym Daboubi, Hajer Siala, Faida Ouali, Meriam Becher, Nourelhouda Toumi, Amina Bibi, Taieb Messsaoud
BACKGROUND: Glucose-6-phosphate dehydrogenase (G6PD) deficiency is the commonest enzymopathy worldwide. The incidence depends essentially on the methods used for the assessment. In this respect, we attempted in this study to set cut-off values of G6PD activity to discriminate among normal, heterozygous, and deficient individuals using the World Health Organization (WHO) classification and the receiver operating characteristics (ROC) curve analysis. METHODS: Blood samples from 250 female and 302 male subjects were enrolled in this study...
January 18, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28080998/determination-of-oxycodone-and-its-major-metabolites-noroxycodone-and-oxymorphone-by-ultra-high-performance-liquid-chromatography-tandem-mass-spectrometry-in-plasma-and-urine-application-to-real-cases
#15
Flaminia Pantano, Stefano Brauneis, Alexandre Forneris, Roberta Pacifici, Enrico Marinelli, Chrystalla Kyriakou, Simona Pichini, Francesco Paolo Busardò
BACKGROUND: Oxycodone is a narcotic drug widely used to alleviate moderate and severe acute and chronic pain. Variability in analgesic efficacy could be explained by inter-subject variations in plasma concentrations of parent drug and its active metabolite, oxymorphone. To evaluate patient compliance and to set up therapeutic drug monitoring (TDM), an ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) assay was developed and validated for the parent drug and its major metabolites noroxycodone and oxymorphone...
January 12, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28076312/implausible-elevation-of-peripheral-thyroid-hormones-during-therapy-with-a-protein-supplement
#16
Igor A Harsch, Peter C Konturek, Klas Böer, Mike Reinhöfer
No abstract text is available yet for this article.
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28076311/biomarkers-of-acute-kidney-injury-the-pathway-from-discovery-to-clinical-adoption
#17
Kianoush Kashani, Wisit Cheungpasitporn, Claudio Ronco
Acute kidney injury (AKI) is a common complication of critical illnesses and has a significant impact on outcomes, including mortality and morbidities. Unfortunately, apart from prophylactic measures, no effective treatment for this syndrome is known. Therefore, early recognition of AKI not only can provide better opportunities for preventive interventions, but also opens many gates for research and development of effective therapeutic options. Over the last few years, several new AKI biomarkers have been discovered and validated to improve early detection, differential diagnosis, and differentiation of patients into risk groups for progressive renal failure, need for renal replacement therapy (RRT), or death...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28076310/the-serum-concentrations-of-leptin-and-mcp-1-independently-predict-low-back-pain-duration
#18
Giuseppe Lippi, Concetta Dagostino, Ruggero Buonocore, Rosalia Aloe, Chiara Bonaguri, Guido Fanelli, Massimo Allegri
BACKGROUND: Low back pain (LBP) is a very frequent condition, affecting most people at some point throughout their life. This cross-sectional study was aimed to investigate a selected panel of cytokines and inflammatory biomarkers in patients with or without LBP. METHODS: The study population consisted of 104 patients diagnosed with LBP (52 non-persistent and 52 persistent) and 52 healthy subjects with no LBP. Blood samples were collected for assessment of adiponectin, leptin, monocyte chemoattractant protein-1 (MCP-1) and C reactive protein (CRP)...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28076309/activation-of-the-tryptophan-serotonin-pathway-is-associated-with-severity-and-predicts-outcomes-in-pneumonia-results-of-a-long-term-cohort-study
#19
Marc A Meier, Manuel Ottiger, Alaadin Vögeli, Christian Steuer, Luca Bernasconi, Robert Thomann, Mirjam Christ-Crain, Christoph Henzen, Claus Hoess, Werner Zimmerli, Andreas Huber, Beat Mueller, Philipp Schuetz
BACKGROUND: As part of the immune defense during infection, an increase in enzyme activity of indoleamine 2,3-dioxygenase (IDO) leads to a breakdown of tryptophan to kynurenine. In previous animal studies, therapeutic antagonism of IDO resulted in reduced sepsis mortality. We investigated the prognostic ability of tryptophan, serotonin, kynurenine and IDO (represented by the ratio of kynurenine/tryptophan) to predict adverse clinical outcomes in patients with community-acquired pneumonia (CAP)...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28076308/measurements-of-serum-non-ceruloplasmin-copper-by-a-direct-fluorescent-method-specific-to-cu-ii
#20
Rosanna Squitti, Mariacristina Siotto, Emanuele Cassetta, Imane Ghafir El Idrissi, Nicola A Colabufo
BACKGROUND: Meta-analyses indicated the breakdown of copper homeostasis in the sporadic form of Alzheimer's disease (AD), comprising copper decreases within the brain and copper increases in the blood and the pool not bound to ceruloplasmin (non-Cp Cu, also known in the literature as "free" copper). The calculated non-Cp Cu (Walshe's) index has many limitations. METHODS: A direct fluorescent method for non-Cp Cu detection has been developed and data are presented herein...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
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