Abstract：
OBJECTIVE:Elevated concentrations of hCG beta core fragment (hCGβcf) are known to cause false-negative results in qualitative urine pregnancy test devices, but the pattern of urinary hCGβcf during normal pregnancy has not been well characterized. Here, we evaluate the relationship between urine hCG, hCGβcf, and hCG free β subunit (hCGβ) during pregnancy. DESIGN AND METHODS:Banked second trimester urine specimens from 100 pregnant women were screened for high concentrations of hCGβcf using a qualitative point-of-care device known to demonstrate false-negative results in the presence of elevated hCGβcf concentrations. Additional first and third trimester specimens from the same pregnancy were obtained from 10 women who generated negative/faint positive results, 5 women who generated intermediate positive results, and 10 women who generated strong positive results on the point-of-care device. Intact hCG, hCGβcf, hCGβ, and specific gravity were quantified in these 75 specimens. RESULTS:Urinary hCGβcf concentrations were greater than intact hCG concentrations at all times. A strong correlation (r(2)=0.70) was observed between urine intact hCG and hCGβcf concentrations. A poor correlation was observed between specific gravity and intact hCG (r(2)=0.32), hCGβ (r(2)=0.32), and hCGβcf (r(2)=0.32). The highest hCGβcf concentrations were observed between 10 and 16weeks gestation but individual women demonstrated very different patterns of hCGβcf excretion. CONCLUSIONS:Urine specimens with elevated hCGβcf are frequently encountered during pregnancy but hCGβcf excretion patterns are unpredictable. Manufacturers and clinicians must appreciate that hCGβcf is the major immunoreactive component in urine during pregnancy and must design and interpret qualitative urine hCG test results accordingly.
journal_name
Clin Biochemjournal_title
Clinical biochemistryauthors
Nerenz RD,Yarbrough ML,Stenman UH,Gronowski AMdoi
10.1016/j.clinbiochem.2016.04.006subject
Has Abstractpub_date
2016-07-01 00:00:00pages
777-81issue
10-11eissn
0009-9120issn
1873-2933pii
S0009-9120(16)30012-1journal_volume
49pub_type
杂志文章,随机对照试验abstract：PURPOSE:Dermatan sulfate (DS) plays a number of roles in a wide range of biological activities such as cell signaling and tissue morphogenesis through interactions with various extracellular matrix proteins including collagen. Mutations in the carbohydrate sulfotransferase 14 gene (CHST14) encoding CHST14/dermatan 4-O-...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2017.02.018
更新日期：2017-08-01 00:00:00
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
更新日期：2018-08-01 00:00:00
abstract：:A study conducted on 228 diabetic patients has shown a significant positive association between serum gamma-glutamyl transpeptidase (GGT) and triglyceride levels. Both fall with treatment, the most marked reduction occurring in patients on insulin. We suggest that the association between serum GGT and triglyceride lev...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(76)80059-8
更新日期：1976-08-01 00:00:00
abstract：OBJECTIVES:Oxidative stress has a clear pro tumoral effect in myeloproliferative neoplasms (MPDs). In this study, we analyzed oxidative stress in patients with essential thrombocythemia (ET) and polycythemia vera (PV). Design and methods We analyzed serum levels of advanced oxidation protein products (AOPPs) degradatio...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.07.100
更新日期：2012-11-01 00:00:00
abstract：:Retrospective analysis of DNA from paraffin-embedded fixed bone marrow biopsy specimens is possible if preceded by amplification of the DNA sequences of interest by the polymerase chain reaction (PCR). These fixed specimens yield degraded DNA that may not be suitable for direct analysis by conventional digestion and h...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(92)80051-h
更新日期：1992-04-01 00:00:00
abstract：:The initial step in the action of thyrotropin (TSH) is its binding to the TSH receptor. TSH receptor antibodies are detected in up to 90% of patients with Graves' disease. Serial measurements of TSH receptor antibodies in patients with Graves' hyperthyroidism are helpful in predicting relapse. The TSH receptor was pur...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(90)90417-s
更新日期：1990-02-01 00:00:00
abstract：OBJECTIVES:Osteoprotegerin (OPG) is a regulator of bone and vascular homeostasis and acts as a decoy receptor for proapoptotic TNF-related apoptosis-inducing ligand (TRAIL). DESIGN AND METHODS:We assessed pericardial and serum levels of OPG and TRAIL in pericardial effusions (PE) of malignant (mPE, n=24) or non-malign...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2011.12.003
更新日期：2012-02-01 00:00:00
abstract：OBJECTIVES:To determine the relationship between BiliChek TcB (Respironics, Marietta GA) and Doumas reference serum or plasma total bilirubin (TSB). DESIGN AND METHODS:Pooled samples with values assigned by the Doumas reference method were used to establish the relationship between a local laboratory and reference Dou...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2010.04.065
更新日期：2010-08-01 00:00:00
abstract：:To design and deliver high quality, safe and effective products, manufacturers of in vitro diagnostic (IVD) products follow a structured, traceable process for controlling the uncertainty of results reported from their measurement systems. This process and its results however, are not often shared in detail with those...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2018.04.012
更新日期：2018-07-01 00:00:00
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journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2005.10.005
更新日期：2006-01-01 00:00:00
abstract：INTRODUCTION:Bisalbuminemia is a genetic condition in which an albumin variant is found in serum in addition to normal albumin. METHODS AND MATERIALS:Serum protein electrophoresis using the Sebia HYDRASYS electrophoresis system was performed on an 84 year old male. RESULTS:Serum protein electrophoresis showed a singl...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2011.10.005
更新日期：2012-01-01 00:00:00
abstract：:Only recently has radioimmunoassay been used for the detection of drugs of abuse in body fluids. The radioimmunoassay method is rapid, sensitive, specific, and can be performed with a minimum of sample, while conventional assay methods are time-consuming, relatively insensitive, and require a larger sample volume. Per...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(78)90098-x
更新日期：1978-06-01 00:00:00
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
更新日期：2012-02-01 00:00:00
abstract：OBJECTIVES:Microarray analysis of gene expression profiles of blood leukocytes has many potential clinical and research applications. DESIGN AND METHODS:We used the PAXgene Blood RNA System to prepare RNA from the whole blood of normal volunteers using two incubation times followed by gene expression profiling using t...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2004.03.013
更新日期：2004-09-01 00:00:00
abstract：:Plasminogen activators (PAs) are specific proteolytic enzymes which convert the inactive proenzyme plasminogen to plasmin. The plasmin formed is a potent and nonspecific protease which cleaves blood fibrin clots and several other extracellular proteins. In addition to their primary role in the initiation of fibrinolys...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/0009-9120(90)90601-p
更新日期：1990-06-01 00:00:00
abstract：BACKGROUND:Reference intervals have traditionally been partitioned by age based on statistical significance and physiological relevance. However, analyte concentration does not change abruptly with age, but rather dynamically. In this study, we establish biochemical marker continuous reference intervals for a Canadian ...
journal_title：Clinical biochemistry
pub_type： 临床试验,杂志文章
doi：10.1016/j.clinbiochem.2019.08.010
更新日期：2019-11-01 00:00:00
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
更新日期：2015-05-01 00:00:00
abstract：:High-molecular-weight von Willebrand factor (vWf) multimers were separated from their smaller multimers by molecular-sieve chromatography and were measured by several sandwich enzyme-linked immunosorbent assays (ELISA) with monoclonal antibodies (moABs) against human vWf. The epitopes of these moABs were mapped partia...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(94)90022-1
更新日期：1994-04-01 00:00:00
abstract：:Although a multitude of hepatitis B markers are available to discriminate different states of hepatitis B virus (HBV) infection, there remains a need to detect the HBV DNA itself. The HBV DNA test is the only test that can quantify the number of complete virions. As shown in this review, the diagnostic value of testin...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(93)90127-r
更新日期：1993-08-01 00:00:00
abstract：OBJECTIVES:To assess the medical applicability of CpG methylation as molecular markers for cancer diagnosis, we established a new system to determine DNA methylation based on TaqMan PCR combined with a methyl-binding-domain polypeptide 2. DESIGN AND METHODS:We evaluated the diagnostic applicability of this approach by...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.03.017
更新日期：2009-07-01 00:00:00
abstract：OBJECTIVES:Two methods, Petersen's error grid analysis and Shermock's method to detect clinically important differences, were recently developed to advance the assessment of analytic performance of point-of-care INR devices. Both methods predict when alternate INR measures lead to different clinical decisions. Our goal...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.01.032
更新日期：2012-05-01 00:00:00
abstract：OBJECTIVES:To report the clinical and laboratory characteristics of urea cycle disorder (UCD) patients at a tertiary care center in a developing country. DESIGN AND METHODS:Retrospective study of clinical and laboratory data of UCD patients. RESULTS:Thirty-seven UCD patients were studied, 31 symptomatic (high risk) p...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.12.004
更新日期：2010-03-01 00:00:00
abstract：OBJECTIVES:Hepcidin is the main regulator of systemic iron homeostasis and its expression is modulated by iron status, hypoxia, erythroid factors and inflammation. The aim of our study was to examine a relationship between level of hepcidin and iron status, erythropoietic activity, hypoxia and inflammation in exacerbat...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2015.07.010
更新日期：2015-12-01 00:00:00
abstract：OBJECTIVES:The relative proportion in percentage of the isoenzyme A of beta-hexosaminidase (Hex) is the single discriminatory function most frequently used for the biochemical screening of heterozygote Tay-Sachs disease carriers. It has been suggested that the assay of the Hex isoenzymes in homogeneous cell preparation...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2005.05.016
更新日期：2005-10-01 00:00:00
abstract：BACKGROUND AND AIM:TGF-β1 has been previously reported to be involved in the pathogenesis of atherosclerosis. The aim of the present study was to assess whether functional gene polymorphisms of TGF-β1 and its key receptor TGF-β receptor type II (TGFBR2) contribute as risk factors to the onset and severity of atheroscle...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.05.022
更新日期：2016-08-01 00:00:00
abstract：OBJECTIVES:Despite the evidence that both homocysteine and cysteine are important risk factors for vascular disease and atherosclerosis no information are reported about their effective amount in plaque and on the relationship with the other low molecular weight thiols. DESIGN AND METHODS:We used capillary electrophor...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.02.007
更新日期：2009-06-01 00:00:00
abstract：OBJECTIVES:To assess the association of serum adiponectin and microvascular complications of diabetes in an urban south Indian type 2 diabetic population. DESIGN AND METHODS:Diabetic subjects [n=487] were included from Chennai Urban Rural Epidemiology Study (CURES). Four-field stereo retinal color photography was done...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2014.10.009
更新日期：2015-01-01 00:00:00
abstract：OBJECTIVES:To verify the role of IL-12 in the pathogenesis of psoriasis and determine its relation to IFNgamma. DESIGN AND METHODS:Skin biopsies from lesional and non-lesional skin of 30 patients and 10 healthy controls were obtained for quantitative PCR examination of IL-12 (P40) and IFNgamma mRNA as well as in situ ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2005.11.008
更新日期：2006-02-01 00:00:00
abstract：INTRODUCTION:The avoidance of repeat chemistry testing such as Complete Blood Count (CBC) and Electrolyte Panel (EP) on clinically stable patients was identified as important utilization goals by Choosing Wisely Canada. The purpose of this study was to assess the volume of overutilization of CBC and EP in an inpatient ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2019.12.011
更新日期：2020-03-01 00:00:00
abstract：OBJECTIVES:Calprotectin is released from activated leukocytes and calprotectin can thus be used as a marker for leukocyte activation. Faeces calprotectin is not only used as a marker for inflammatory bowel disease but can also be used to detect leukocyte activation in other body fluids. The aim of the present study was...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2014.01.003
更新日期：2014-08-01 00:00:00
