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Dried blood spots

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https://www.readbyqxmd.com/read/28322027/rapid-differentiating-colorectal-cancer-and-colorectal-polyp-using-dried-blood-spot-mass-spectrometry-metabolomic-approach
#1
Yu Jing, Xue Wu, Peng Gao, Zhongze Fang, Jingjing Wu, Qingjun Wang, Chen Li, Zhitu Zhu, Yunfeng Cao
Colorectal cancer (CRC) is the third leading causes of cancer mortality, and the early-stage detection could significantly enhance survival rates. Cancer influences the important metabolic pathways and the changes in metabolite levels had been used in many studies as the potential biomarkers. This study is aimed at screening metabolite biomarkers with CRC diagnosis potentials. The direct infusion mass spectrometry (MS) metabolomic analysis based on dried blood spot was used to distinguish CRC from polyp. The target metabolites were composed of 23 amino acids and 26 acylcarnitines...
March 20, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28318369/high-rate-of-hepatitis-b-virus-infection-among-hairdressers-in-ibadan-nigeria
#2
B A Olusola, E A Gometi, O Ogunsemowo, D O Olaleye, G N Odaibo
Hepatitis B virus (HBV) infection is a major public health problem with over two billion people infected globally. Occupationally exposed persons are at high risk of HBV infection. Apart from medical personnel, there is dearth of information as regards the prevalence and awareness of HBV among occupationally exposed persons in the country. This study was designed to determine the levels of HBV awareness and prevalence of HBV infection among hairdressers in Ibadan, Nigeria. Hairdressers and teachers (unmatched controls) in four local government areas in Ibadan were tested for HBV infection using ELISA technique...
March 20, 2017: Journal of Immunoassay & Immunochemistry
https://www.readbyqxmd.com/read/28314860/a-newborn-screening-method-for-cerebrotendinous-xanthomatosis-using-bile-alcohol-glucuronides-and-metabolite-ratios
#3
Frédéric M Vaz, Albert H Bootsma, Willem Kulik, Aad Verrips, Ron A Wevers, Peter C Schielen, Andrea E DeBarber, Hidde H Huidekoper
Cerebrotendinous xanthomatosis (CTX) is a treatable neurodegenerative metabolic disorder of bile acid synthesis where symptoms can be prevented if treatment with chenodeoxycholic acid supplementation is initiated early in life, making CTX an excellent candidate for newborn screening. We developed a new dried blood spot screening assay for this disorder based on different ratios between the accumulating cholestanetetrol glucuronide (tetrol) and specific bile acids/bile acid intermediates, without the need for derivatization...
March 17, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28306597/diagnosis-of-viral-hepatitis
#4
Philippa J Easterbrook, Teri Roberts, Anita Sands, Rosanna Peeling
PURPOSE OF REVIEW: Chronic hepatitis B virus (HBV) and hepatitis C virus (HCV) infections and HIV-HBV and HCV coinfection are major causes of chronic liver disease worldwide. Testing and diagnosis is the gateway for access to both treatment and prevention services, but there remains a large burden of undiagnosed infection globally. We review the global epidemiology, key challenges in the current hepatitis testing response, new tools to support the hepatitis global response (2016-2020 Global Hepatitis Health Sector strategy, and 2017 WHO guidelines on hepatitis testing and their key recommendations) and future directions and innovations in hepatitis diagnostics...
March 16, 2017: Current Opinion in HIV and AIDS
https://www.readbyqxmd.com/read/28302345/newborn-screening-for-six-lysosomal-storage-disorders-in-a-cohort-of-mexican-patients-three-year-findings-from-a-screening-program-in-a-closed-mexican-health-system
#5
Juana Inés Navarrete-Martínez, Ana Elena Limón-Rojas, Maria de Jesús Gaytán-García, Jesús Reyna-Figueroa, Guillermo Wakida-Kusunoki, Ma Del Rocío Delgado-Calvillo, Consuelo Cantú-Reyna, Héctor Cruz-Camino, David Eduardo Cervantes-Barragán
OBJECTIVE: To evaluate the results of a lysosomal newborn screening (NBS) program in a cohort of 20,018 Mexican patients over the course of 3years in a closed Mexican Health System (Petróleos Mexicanos [PEMEX] Health Services). STUDY DESIGN: Using dried blood spots (DBS), we performed a multiplex tandem mass spectrometry enzymatic assay for six lysosomal storage disorders (LSDs) including Pompe disease, Fabry disease, Gaucher disease, mucopolysaccharidosis type I (MPS-I), Niemann-Pick type A/B, and Krabbe disease...
March 9, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28301421/persistence-of-hiv-drug-resistance-among-south-african-children-given-nevirapine-to-prevent-mother-to-child-transmission
#6
Ruth Kanthula, Theresa Rossouw, Ute D Feucht, Gisela Van Dyk, Ingrid A Beck, Rachel Silverman, Scott Olson, Christen Salyer, Sharon Cassol, Lisa M Frenkel
OBJECTIVES: We set out to examine the prevalence and persistence of mutations conferring high-level nonnucleoside-reverse-transcriptase (NNRTI)-resistance in a cohort of HIV-infected children who had failed prophylaxis to prevent mother-to-child-transmission (PMTCT). DESIGN: A prospective observational cohort study at the Pediatric HIV Clinic at Kalafong Provincial Tertiary Hospital in Pretoria, South Africa. METHODS: Children referred for initiation of ART were enrolled from July 2010 through February 2013...
March 15, 2017: AIDS
https://www.readbyqxmd.com/read/28300419/dried-blood-spot-validation-of-five-immunosuppressants-without-hematocrit-correction-on-two-lc-ms-ms-systems
#7
Remco A Koster, Herman Veenhof, Rixt Botma, Alle Tjipke Hoekstra, Stefan P Berger, Stephan Jl Bakker, Jan-Willem C Alffenaar, Daan J Touw
AIM: Hematocrit (Ht) effects remain a challenge in dried blood spot (DBS) sampling. The aim was to develop an immunosuppressant DBS assay on two LC-MS/MS systems covering a clinically relevant Ht range without Ht correction. RESULTS: The method was partially validated for tacrolimus, sirolimus, everolimus, cyclosporin A and fully validated for mycophenolic acid on an Agilent and Thermo LC-MS/MS system. Bias caused by Ht effects were within 15% for all immunosuppressants between Ht levels of 0...
March 16, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28299418/expanding-the-knowledge-on-dried-blood-spots-and-lc-ms-based-protein-analysis-two-different-sampling-materials-and-six-protein-targets
#8
Cecilie Rosting, Astrid Gjelstad, Trine Grønhaug Halvorsen
The combination of dried blood spots (DBS) and bottom-up LC-MS-based protein analysis was investigated in the present paper using six model proteins (1 mg/mL of each protein) with different physicochemical properties. Two different materials for DBS were examined: a water-soluble DBS material (carboxymethyl cellulose, (CMC)) and a commercially available (non-soluble) material (DMPK-C). The sample preparation was optimised regarding the water-soluble material and achieving acceptable repeatability of the signal was emphasised...
March 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28299415/multi-mycotoxin-analysis-using-dried-blood-spots-and-dried-serum-spots
#9
Bernd Osteresch, Susana Viegas, Benedikt Cramer, Hans-Ulrich Humpf
In this study, a rapid multi-mycotoxin approach was developed for biomonitoring and quantification of 27 important mycotoxins and mycotoxin metabolites in human blood samples. HPLC-MS/MS detection was used for the analysis of dried serum spots (DSS) and dried blood spots (DBS). Detection of aflatoxins (AFB1, AFB2, AFG1, AFG2, AFM1), trichothecenes (deoxynivalenol, DON; DON-3-glucoronic acid, DON-3-GlcA; T-2; HT-2; and HT-2-4-GlcA), fumonisin B1 (FB1), ochratoxins (OTA and its thermal degradation product 2'R-OTA; OTα; 10-hydroxychratoxin A, 10-OH-OTA), citrinin (CIT and its urinary metabolite dihydrocitrinone, DH-CIT), zearalenone and zearalanone (ZEN, ZAN), altenuene (ALT), alternariols (AOH; alternariol monomethyl ether, AME), enniatins (EnA, EnA1, EnB, EnB1) and beauvericin (Bea) was validated for two matrices, serum (DSS), and whole blood (DBS)...
March 15, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28294365/prevalence-of-prenatal-alcohol-exposure-in-the-state-of-texas-as-assessed-by-phosphatidylethanol-in-newborn-dried-blood-spot-specimens
#10
Ludmila N Bakhireva, Janet Sharkis, Shikhar Shrestha, Tristan J Miranda-Sohrabji, Sonnie Williams, Rajesh C Miranda
BACKGROUND: While 2-5% of school-aged children in the U.S. are estimated to be affected by Fetal Alcohol Spectrum Disorders (FASD), the prevalence of prenatal alcohol exposure (PAE) might be substantially under-reported. Our objective was to systematically estimate the prevalence of PAE in Texas by measuring a direct ethanol metabolite, phosphatidylethanol (PEth), in 1,000 infant residual dried blood spots (irDBS) in the Texas Newborn Screening Repository. METHODS: All Public Health Regions were represented proportional to their 2014 birth rate (~0...
March 13, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/28292561/dried-blood-spots-combined-to-an-uplc-ms-ms-method-for-the-simultaneous-determination-of-drugs-of-abuse-in-forensic-toxicology
#11
Susana Sadler Simões, Antonio Castañera Ajenjo, Mário João Dias
A method for the simultaneous determination of 11 illicit drugs, using the dried blood spot (DBS) sampling technique combined with the UPLC-MS/MS technology was developed to study its applicability within the forensic toxicology. The DBS samples, prepared from a blood volume of 50μL and using the Whatman® BFC 180 bloodstain cards, were extracted with a methanol/acetonitrile mixture. The chromatographic separation was performed using an Acquity UPLC(®) HSS T3 column (100mm×2.1mm, 1.8μm) and an acetonitrile/2mM ammonium formate (0...
February 27, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28283366/the-frequency-of-fabry-disease-among-young-cryptogenic-stroke-patients-in-the-city-of-sakarya
#12
Aslı Aksoy Gündoğdu, Dilcan Kotan, Murat Alemdar
BACKGROUND: Fabry disease (FD) is known as a rare cause of stroke. Recent studies suggested that FD is an underdiagnosed entity among young stroke patients. We aimed to investigate the frequency of FD in young cryptogenic stroke patients who lived in the City of Sakarya and to define the clinical features that help in recognizing patients with FD. METHODS: Acute ischemic stroke patients aged 18-55 years who were admitted to our hospital between October 2013 and September 2016 were evaluated for inclusion...
March 7, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28278509/evaluation-of-the-automated-qiasymphony-sp-as-workflow-for-cytomegalovirus-dna-extraction-and-amplification-from-dried-blood-spots
#13
Daniela Spalletti-Cernia, Sara Barbato, Rosanna Sorrentino, Luca Vallefuoco, Caterina Rocco, Pasquale Di Costanzo, Antonella Giannattasio, Francesco Raimondi, Claudia Mazzarella, Roberta De Mattia, Giuseppe Portella
OBJECTIVE: Human cytomegalovirus (CMV) can be considered the most important agent of congenital infection. Long-term sequelae of congenital infection occur in about 15% of infants asymptomatic at birth. To avoid long-term sequelae or to reduce their burden, it is necessary to identify infected children for early interventions. CMV DNA can be detected in dried blood spots (DBSs). DBSs have been used in several studies for the retrospective diagnosis of congenital CMV (CCMV). It has been proposed to use DBSs for the newborn screening of CMV infection; however, manual methods are not suitable for newborn screening of CCMV...
March 10, 2017: Intervirology
https://www.readbyqxmd.com/read/28275077/improving-the-specificity-of-p-falciparum-malaria-diagnosis-in-high-transmission-settings-with-a-two-step-rdt-and-microscopy-algorithm
#14
Moses Murungi, Travis Fulton, Raquel Reyes, Michael Matte, Moses Ntaro, Edgar Mulogo, Dan Nyehangane, Jonathan J Juliano, Mark J Siedner, Yap Boum, Ross M Boyce
Poor specificity may negatively impact rapid diagnostic test (RDT) based diagnostic strategies for malaria. We performed real time polymerase chain reaction on a subset of subjects who had undergone diagnostic testing with a multiple antigen (HRP2/pLDH) RDT and microscopy. We determined the sensitivity and specificity of the RDT in comparison to PCR for the detection of P. falciparum malaria. We developed and evaluated a two-step algorithm utilizing the multiple-antigen RDT to screen patients followed by confirmatory microscopy for those individuals with HRP2+/pLDH- results...
March 8, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28274233/newborn-screening-for-tyrosinemia-type-1-using-succinylacetone-a-systematic-review-of-test-accuracy
#15
REVIEW
Chris Stinton, Julia Geppert, Karoline Freeman, Aileen Clarke, Samantha Johnson, Hannah Fraser, Paul Sutcliffe, Sian Taylor-Phillips
BACKGROUND: Tyrosinemia type 1 is an autosomal recessive disorder of amino acid metabolism. Without treatment, death in childhood is common. Treatment with nitisinone and dietary restrictions are associated with improved outcomes; some studies suggest better outcomes when treatment begins at an asymptomatic stage. Newborn screening allows for earlier identification, but there is uncertainty regarding the test accuracy of the current method: succinylacetone measurement in dried blood spots using tandem mass spectrometry...
March 9, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28271401/variants-of-the-eaat2-glutamate-transporter-gene-promoter-are-associated-with-cerebral-palsy-in-preterm-infants
#16
Shavanthi Rajatileka, David Odd, Matthew T Robinson, Alexandra C Spittle, Louis Dwomoh, Maggie Williams, David Harding, Miles Wagstaff, Marie Owen, Charlene Crosby, Jared Ching, Elek Molnár, Karen Luyt, Anikó Váradi
Preterm delivery is associated with neurodevelopmental impairment caused by environmental and genetic factors. Dysfunction of the excitatory amino acid transporter 2 (EAAT2) and the resultant impaired glutamate uptake can lead to neurological disorders. In this study, we investigated the role of single nucleotide polymorphisms (SNPs; g.-200C>A and g.-181A>C) in the EAAT2 promoter in susceptibility to brain injury and neurodisability in very preterm infants born at or before 32-week gestation. DNA isolated from newborns' dried blood spots were used for pyrosequencing to detect both SNPs...
March 7, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28265479/clinical-analysis-of-algerian-patients-with-pompe-disease
#17
Y Sifi, M Medjroubi, R Froissart, N Taghane, K Sifi, A Benhabiles, S Lemai, S Semra, H Benmekhebi, Z Bouderda, N Abadi, A Hamri
Pompe's disease is a metabolic myopathy caused by a deficiency of acid alpha-glucosidase (GAA), also called acid maltase, an enzyme that degrades lysosomal glycogen. The clinical presentation of Pompe's disease is variable with respect to the age of onset and rate of disease progression. Patients with onset of symptoms in early infancy (infantile-onset Pompe disease (IOPD)) typically exhibit rapidly progressive hypertrophic cardiomyopathy and marked muscle weakness. Most of them die within the first year of life from cardiac and/or respiratory failure...
2017: Journal of Neurodegenerative Diseases
https://www.readbyqxmd.com/read/28259515/quantitation-of-plasmatic-lysosphingomyelin-and-lysosphingomyelin-509-for-differential-screening-of-niemann-pick-a-b-and-c-diseases
#18
L Kuchar, J Sikora, M E Gulinello, H Poupetova, A Lugowska, V Malinova, H Jahnova, B Asfaw, J Ledvinova
Acid sphingomyelinase deficiency (ASMd, Niemann-Pick disease A/B) and Niemann-Pick type C disease (NPC) share core clinical symptoms. Initial diagnostic discrimination of these two rare lysosomal storage diseases is thus difficult. As sphingomyelin accumulates in ASMd as well as NPC, lysosphingomyelin (sphingosylphosphorylcholine) and its m/z 509 analog were suggested as biomarkers for both diseases. Herein we present results of simultaneous LC-ESI-MS/MS measurements of lysosphingomyelin and lysosphingomyelin 509 in plasma and dried blood spots (DBS) collected from ASMd and NPC patients and suggest that the plasma but not DBS levels of the two analytes allow differential biochemical screening of ASMd and NPC...
March 1, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28242052/a-cyclic-olefin-copolymer-microfluidic-immobilized-enzyme-reactor-for-rapid-digestion-of-proteins-from-dried-blood-spots
#19
Bert Wouters, Irena Dapic, Thalassa S E Valkenburg, Sam Wouters, Leon Niezen, Sebastiaan Eeltink, Garry L Corthals, Peter J Schoenmakers
A critical step in the bottom-up characterization of proteomes is the conversion of proteins to peptides, by means of endoprotease digestion. Nowadays this method typically uses overnight digestion and as such represents a considerable bottleneck for high-throughput analysis. This report describes protein digestion using an immobilized-enzyme reactor (IMER), which enables accelerated digestion times that are completed within seconds to minutes. For rapid digestion to occur, a cyclic-olefin-copolymer microfluidic reactor was constructed containing trypsin immobilized on a polymer monolithic material through a 2-vinyl-4,4-dimethylazlactone linker...
March 31, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28238812/platelet-count-may-impact-on-lysosomal-acid-lipase-activity-determination-in-dried-blood-spot
#20
Umberto Vespasiani-Gentilucci, Jessica D'Amico, Antonio De Vincentis, Giulia Tozzi, Ferruccio Vorini, Paolo Gallo, Simone Carotti, Francesco Valentini, Giovanni Galati, Chiara dell'Unto, Fiorella Piemonte, Antonio Picardi
BACKGROUND: We aimed to evaluate the influence of white blood cell (WBC) and platelet (PLT) counts on dried blood spot (DBS)-determined lysosomal acid lipase (LAL) activity in a large group of healthy subjects. METHODS: One-hundred-and-seventy-two healthy subjects aged ≥18 were enrolled. Complete clinical biochemistry and LAL activity in DBS were determined. In 35 subjects, WBCs and PLTs were isolated, and LAL activity was measured in both blood cell populations...
February 24, 2017: Clinical Biochemistry
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