Effects of hemoglobin variants on Hb A1c determinations using Bio-Rad columns.

Abstract:

:In the column chromatographic determination of Hb A1c, hemoglobin variants affect Hb A1c results and column patterns. Samples from several patients with hemoglobin variants were run on Bio-Rad Hb A1c columns to demonstrate these patterns. Columns should be examined during the run to detect the presence of Hb F which migrates very rapidly, and after the run to detect abnormal column patterns. Hb A1c levels in patients heterozygous for Hb S or C are low but may be interpreted in relation to the patient's level of Hb A. On the other hand, Hb A1c results on patients with homozygous Hb S, Hb C, or high levels of Hb F cannot be interpreted.

journal_name

Clin Biochem

journal_title

Clinical biochemistry

authors

Allen LC

doi

10.1016/s0009-9120(85)80103-x

subject

Has Abstract

pub_date

1985-06-01 00:00:00

pages

173-5

issue

3

eissn

0009-9120

issn

1873-2933

pii

S0009-9120(85)80103-X

journal_volume

18

pub_type

杂志文章
  • Preanalytic of total antioxidant capacity assays performed in serum, plasma, urine and saliva.

    abstract::The investigation of oxidative stress (OS), its mechanisms and connections with human diseases, is a topic of interest with more than 36,000 PubMed citations to date. The OS can be approached either from the perspective of pro-oxidation, either of anti-oxidation, and both can be investigated considering individual che...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章,评审

    doi:10.1016/j.clinbiochem.2016.11.037

    authors: Ialongo C

    更新日期:2017-04-01 00:00:00

  • Relationship between measured average glucose by continuous glucose monitor and HbA1c measured by three different routine laboratory methods.

    abstract:OBJECTIVES:The relationship between glycated hemoglobin A1c (HbA1c) and average glucose has been described by the empirically derived estimated average glucose (eAG) equation in the A1c-Derived Average Glucose (ADAG) study, with extensive calibration efforts in four secondary reference HbA1c methods. It is not known if...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2015.02.012

    authors: Loh TP,Sethi SK,Wong MS,Tai ES,Kao SL

    更新日期:2015-05-01 00:00:00

  • Superiority of high sensitivity cardiac troponin T vs. I for long-term prognostic value in patients with chest pain; data from the Akershus cardiac Examination (ACE) 3 study.

    abstract:BACKGROUND:Cardiac troponins (cTn) are essential in the diagnostic assessment of non-ST-segment-elevation acute coronary syndrome (NSTE-ACS). Elevated concentrations of cTnT and cTnI predict cardiovascular events in non-acute settings, but the individual troponin isotype association with long-term mortality in patients...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2019.12.016

    authors: Tveit SH,Myhre PL,Hoff NJS,Le TM,Seljeflot I,Røysland R,Høiseth AD,Røsjø H,Omland T

    更新日期:2020-04-01 00:00:00

  • Changes in serum histologic surrogate markers and procollagen III N-terminal peptide as independent predictors of HBeAg loss in patients with chronic hepatitis B during entecavir therapy.

    abstract:OBJECTIVES:The aims of this study were to determine the changes in serum histologic surrogate markers and to identify the serum markers predicting treatment response in patients with chronic hepatitis B (CHB) during entecavir treatment. DESIGN AND METHODS:Sixty CHB patients who received entecavir for 12 months were in...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2011.09.023

    authors: Koo JH,Lee MH,Kim SS,Kim DH,Kim IS,Lee KM,Yoo BM,Lee KJ,Kim JH,Cho SW,Cheong JY

    更新日期:2012-01-01 00:00:00

  • Association between recurrent miscarriages and organochlorine pesticide levels.

    abstract:OBJECTIVES:Recurrent miscarriage (RM) is a challenging medical problem because of its unknown pathogenesis and etiology in most of the cases. Recent studies suggest the role of persistent environmental pollutants such as organochlorine pesticides (OCPs) in the etiology of RM. The present study was conducted to investig...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2009.09.019

    authors: Pathak R,Mustafa M,Ahmed RS,Tripathi AK,Guleria K,Banerjee BD

    更新日期:2010-01-01 00:00:00

  • Non-covalent associations of proteins in plasma: self-, mixed fibrin(ogen), mixed protein-non-protein associations.

    abstract:OBJECTIVE:To review biochemical literature and determine the significance of non-covalent bonding in plasma. RESULTS:Many non-covalent bonds exist in plasma. Relatively strong self-associations are found for serum albumin, several gamma-globulins, apolipoproteins and fibrin(ogen). Here, fibrinogen and fibrin, consider...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(96)00159-2

    authors: London M

    更新日期:1997-03-01 00:00:00

  • Mass spectrometric quantification of salivary metanephrines-A study in healthy subjects.

    abstract:BACKGROUND:Determination of metanephrine (MN), normetanephrine (NMN), and 3-methoxytyramine (3-MT) in saliva may offer potential diagnostic advantages in diagnosing pheochromocytoma. METHODS:In this preliminary study, we determined metanephrine concentrations in saliva of healthy subjects and the relationship with sim...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2016.02.003

    authors: Osinga TE,van der Horst-Schrivers AN,van Faassen M,Kerstens MN,Dullaart RP,Pacak K,Links TP,Kema IP

    更新日期:2016-09-01 00:00:00

  • Screening for cancer in high risk families.

    abstract:OBJECTIVE:To review screening for cancer in high risk families. METHODS AND RESULTS:Screening for hereditary cancer involves three steps: it is first necessary to identify families at high risk by examining the number and sites of cancer in a family. Special attention is given to cancers appearing at an early age, to ...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章,评审

    doi:10.1016/0009-9120(95)00022-2

    authors: Narod SA

    更新日期:1995-08-01 00:00:00

  • Development of an Au/ZnO thin film surface plasmon resonance-based biosensor immunoassay for the detection of carbohydrate antigen 15-3 in human saliva.

    abstract:OBJECTIVE:To evaluate a novel surface plasmon resonance (SPR) system for the direct measurement of tumor marker carbohydrate antigen 15-3 (CA15-3) in human saliva. DESIGN AND METHODS:We measured the presence of the tumor marker carbohydrate antigen 15-3 (CA15-3) in human saliva using 2 different surface plasmon resona...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2012.09.001

    authors: Liang YH,Chang CC,Chen CC,Chu-Su Y,Lin CW

    更新日期:2012-12-01 00:00:00

  • Fecal chymotrypsin: a new diagnostic test for exocrine pancreatic insufficiency in children with cystic fibrosis.

    abstract::The purpose of this report is to evaluate whether a new, simple, non-invasive method for chymotrypsin measurement in stools is useful for the diagnosis of exocrine pancreatic insufficiency in cystic fibrosis (CF). A hundred children aged from 2 months to 12 years were tested: 50 children had been admitted for chronic ...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(85)80046-1

    authors: Scotta MS,Marzani MD,Maggiore G,De Giacomo C,Melzi D'Eril GV,Moratti R

    更新日期:1985-08-01 00:00:00

  • A reference system for cortisol.

    abstract:OBJECTIVES:The International Federation of Clinical Chemistry (IFCC) initiated a pilot study, with cortisol as an example, that aims to implement the concept of standardization of hapten immunoprocedures on the basis of metrological traceability. In fact, this standardization concept comes down to correct calibration o...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(98)00037-x

    authors: Thienpont LM

    更新日期:1998-08-01 00:00:00

  • The importance of circulating levels of salusin-α, salusin-β, and heregulin-β1 in atherosclerotic coronary arterial disease.

    abstract:OBJECTIVE:The relationship between the severity of atherosclerotic coronary artery disease (CAD) and circulating levels of salusin-α, salusin-β and heregulin-β1 has been investigated. In addition, the relationship with these peptides and high sensitive C-reactive protein (hsCRP) has been investigated. METHODS:The stud...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2020.10.003

    authors: Arkan A,Atukeren P,Ikitimur B,Simsek G,Koksal S,Gelisgen R,Ongen Z,Uzun H

    更新日期:2021-01-01 00:00:00

  • Recent advances of liquid chromatography-(tandem) mass spectrometry in clinical and forensic toxicology.

    abstract::Liquid chromatography (LC) coupled to mass spectrometry (MS) or tandem mass spectrometry (MS/MS) has become increasingly important in clinical and forensic toxicology as well as doping control and is now a robust and reliable technique for routine analysis in these fields. In recent years, methods for LC-MS(/MS)-based...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章,评审

    doi:10.1016/j.clinbiochem.2010.08.008

    authors: Peters FT

    更新日期:2011-01-01 00:00:00

  • Predictors of inexplicable coronary artery spasm during coronary angiography in patients with stable angina--the role of intravascular oxidative stress.

    abstract:OBJECTIVE:This study was conducted to investigate the potential role of intravascular oxidative stress in inexplicable episodes of coronary artery spasm (CAS) during coronary angiography (CAG). DESIGN AND METHODS:Serial patients with stable angina scheduled for routine CAG were prospectively evaluated. Patients with c...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2009.01.021

    authors: Leu HB,Lin WT,Lin CP,Wu TC,Lin SJ,Chen JW

    更新日期:2009-05-01 00:00:00

  • Application of fluorescence polarization to the determination of urinary lysozyme activity.

    abstract::A fluorescence polarization (FP) technique was applied to the assay of lysozyme activity in human urine. In this assay system, reaction between enzyme and fluorescein-labelled substrate produced a decrease in the fluorescein polarization (P) value. Enzyme activity and rate of decrease of P value exhibited a hyperbolic...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(85)80022-9

    authors: Miura H

    更新日期:1985-02-01 00:00:00

  • LC-MS/MS based assay and reference intervals in children and adolescents for oxysterols elevated in Niemann-Pick diseases.

    abstract:BACKGROUND:Niemann-Pick type C (NP-C) is a rare progressive neurodegenerative lipid storage disorder with heterogeneous clinical presentation and challenging diagnostic procedures. Recently oxysterols have been reported to be specific biomarkers for NP-C but knowledge on the intra-individual variation and on reference ...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2015.03.007

    authors: Klinke G,Rohrbach M,Giugliani R,Burda P,Baumgartner MR,Tran C,Gautschi M,Mathis D,Hersberger M

    更新日期:2015-06-01 00:00:00

  • Prognostic significance of circulating intact and cleaved forms of urokinase plasminogen activator receptor in inoperable chemotherapy treated cholangiocarcinoma patients.

    abstract:BACKGROUND:High levels of intact and cleaved forms of the urokinase-type plasminogen activator receptor (uPAR) in both tissue and blood are associated with poor survival in several cancer diseases. The prognostic significance of uPAR in cholangiocarcinoma is unknown. The aims of this study were to determine if pre-trea...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2014.01.030

    authors: Grunnet M,Christensen IJ,Lassen U,Jensen LH,Lydolph M,Lund IK,Thurison T,Høyer-Hansen G,Mau-Sørensen M

    更新日期:2014-05-01 00:00:00

  • Impact of long distance rowing on biological health: A pilot study.

    abstract: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...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2017.11.018

    authors: Frias MA,Virzi J,Golaz O,Gencer B,Mach F,Vuilleumier N

    更新日期:2018-02-01 00:00:00

  • An immunoassay for qualitative estimation of collagenase activity in mammalian tissues.

    abstract::Collagen, the most abundant protein of the mammalian body, is specifically degraded by collagenase. Collagenase activity and subsequent collagen degradation are the main aspects of essential biological processes such as bone remodeling, tissue repair and wound healing. Measurement of collagenase activity is of interes...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(05)80002-5

    authors: Chakraborty A,Eghbali M

    更新日期:1991-12-01 00:00:00

  • Expression analysis and clinical utility of L-Dopa decarboxylase (DDC) in prostate cancer.

    abstract:BACKGROUND:L-Dopa decarboxylase (DDC) is a pyridoxal 5'-phosphate-dependent enzyme that was found to be involved in many malignancies. The aim of this study was to investigate the mRNA expression levels of DDC in prostate tissues and to evaluate its clinical utility in prostate cancer (CaP). METHODS:Total RNA was isol...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2008.04.026

    authors: Avgeris M,Koutalellis G,Fragoulis EG,Scorilas A

    更新日期:2008-10-01 00:00:00

  • Changes in serum obestatin, preptin and ghrelins in patients with Gestational Diabetes Mellitus.

    abstract:OBJECTIVES:The present study aims to establish the levels of acylated ghrelin, desacylated ghrelin, obestatin and preptin, during pregnancy and the postpartum period in pregnant women with Gestational Diabetes Mellitus (GDM) and healthy pregnancy women. DESIGN AND METHODS:The study registered 20 pregnant women with GD...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2011.08.1131

    authors: Baykus Y,Gurates B,Aydin S,Celik H,Kavak B,Aksoy A,Sahin I,Deniz R,Gungor S,Guzel SP,Minareci Y

    更新日期:2012-02-01 00:00:00

  • Relationship between serum butyrylcholinesterase and the metabolic syndrome.

    abstract:OBJECTIVE:To identify independent predictors of serum butyrylcholinesterase (BuChE) activity and examine its relationship with the metabolic syndrome. DESIGN AND METHODS:Serum BuChE activity was measured and metabolic syndrome risk factors were assessed in 1097 healthy subjects recruited from the Newfoundland adult po...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2005.04.008

    authors: Randell EW,Mathews MS,Zhang H,Seraj JS,Sun G

    更新日期:2005-09-01 00:00:00

  • Development of an HPLC method for monitoring of Photofrin II therapy.

    abstract:OBJECTIVES:To develop and to validate a method to quantify plasma porphyrins after application of Photofrin II, a drug preparation that is used for photodynamic therapy (PDT) and as a radiosensitizer. DESIGN AND METHODS:After solid phase extraction of postdose plasma samples, reversed phase high performance-liquid chr...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2004.09.014

    authors: Vogeser M,Schaffer M,Egeler E,Spöhrer U

    更新日期:2005-01-01 00:00:00

  • Tentative identification of hemoglobin variants in the Bio-Rad VARIANT II Hb A1C method.

    abstract:OBJECTIVE:To evaluate if peak characteristics, the retention time, and percentage of total hemoglobin of an unknown peak on the Bio-Rad VARIANT II Hb A1c method may be used to establish a tentative identification of hemoglobin variants. METHOD:The peak characteristics, retention time, and percentage of total hemoglobi...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2004.11.004

    authors: Higgins TN,Ridley B

    更新日期:2005-03-01 00:00:00

  • The importance of low level QC for high sensitivity troponin assays.

    abstract:BACKGROUND:With the advent of the new high-sensitivity troponin assays, it is becoming critical to measure troponin accurately to low concentrations. To ensure assay performance is acceptable, appropriate QC must be run. METHODS:In addition to the routine use of commercial QC material, we prepared pools of human QC ma...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2018.05.007

    authors: Hickman PE,Koerbin G,Badrick T,Oakman C,Potter JM

    更新日期:2018-08-01 00:00:00

  • Unilateral nephrectomy causes an early abrupt decrease in plasma arginine and simultaneous reduction in glomerular filtration rate in living kidney donors.

    abstract:OBJECTIVES:Living donor kidney transplantation is regarded as beneficial to allograft recipients and not particularly detrimental to the donors. Recently we have documented a reduced glomerular filtration rate (GFR) in living kidney donors (LKDs). Considering kidneys as essential for l-arginine (Arg) metabolism, in the...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2013.04.031

    authors: Zunić G,Tomić A,Spasić S

    更新日期:2013-10-01 00:00:00

  • Effect of age and disease on two drug binding proteins: albumin and alpha-1- acid glycoprotein.

    abstract::The influence of age and disease on serum albumin and alpha-1-acid glycoprotein was studied in 126 subjects (69 M, 57 F) presenting with tuberculosis and after recovery. Albumin concentration fell with age in both disease and healthy states, and alpha-1-acid glycoprotein concentration rose with age in the healthy stat...

    journal_title:Clinical biochemistry

    pub_type: 临床试验,杂志文章

    doi:10.1016/0009-9120(94)90032-9

    authors: Woo J,Chan HS,Or KH,Arumanayagam M

    更新日期:1994-08-01 00:00:00

  • Plasma arginase concentration measured by an enzyme-linked immunosorbent assay (ELISA) in normal adult population.

    abstract::Human liver arginase has many biological effects on lymphocytes, macrophages, liver cells, and tumor cells, in addition to its major role in the liver urea cycle. We have developed a sandwich enzyme-linked immunosorbent assay (ELISA) method to quantitate arginase concentrations in plasma that can be applied to various...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/0009-9120(93)80009-j

    authors: Wang SR,Chen ML,Huang MH,Lin HY,Tsai JJ,Kuo BI

    更新日期:1993-12-01 00:00:00

  • Cystatin C reference values and aging.

    abstract:OBJECTIVES:The aim of this study was to determine the reference values for serum cystatin C (CysC) with a particular focus on the effect of aging. DESIGN AND METHODS:The study was performed on a consecutive series of subjects (258 men and 396 women). Laboratory parameters and a detailed personal and family medical his...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/j.clinbiochem.2006.03.017

    authors: Ognibene A,Mannucci E,Caldini A,Terreni A,Brogi M,Bardini G,Sposato I,Mosconi V,Salvadori B,Rotella CM,Messeri G

    更新日期:2006-06-01 00:00:00

  • Myoglobin, creatine kinase MB isoforms and creatine kinase MB mass in early diagnosis of myocardial infarction in patients with acute chest pain.

    abstract:OBJECTIVES:Measurements of myoglobin and creatine kinase (CK)-MB isoforms have been suggested to be sensitive tests for the early diagnosis of myocardial infarction (MI). We have investigated the utility of myoglobin, creatine kinase (CK)-MB isoforms and creatine kinase MB mass (CK-MBm) in early diagnosis of MI using c...

    journal_title:Clinical biochemistry

    pub_type: 杂志文章

    doi:10.1016/s0009-9120(02)00385-5

    authors: Penttilä K,Koukkunen H,Halinen M,Rantanen T,Pyörälä K,Punnonen K,Penttilä I

    更新日期:2002-11-01 00:00:00