Abstract：
:Enzymic fluorimetric methods are described for the determination of primary bile acids and of chenodeoxycholic acid (CDC) and cholic acid (C) in serum. Bile acids are extracted from 0.3 mL of serum in a simple 5-min step with use of Sep-Pak C cartridges. Total primary bile acids are measured by an equilibrium technique after reaction with beta-NAD in the presence of 7 alpha-hydroxysteroid dehydrogenase. Chenodeoxycholic acid (and its conjugates) is measured by a reaction-rate technique employing the same reaction as above but under different experimental conditions. A small contribution of cholic acid (and its conjugates) to the reaction rate is eliminated by simple calculations. Cholic acid is calculated by difference of the two determinations. In both assays NADH fluorescence is measured with the Multistat centrifugal analyzer. Absolute recovery of bile acids from serum was about 87%. Day-to-day standard deviations for CDC and C were 1.6 and 2.0 mumol/L at serum concentrations of 22.1 and 24.1 mumol/L respectively. Comparison data with a cholylglycine RIA procedure gave the following correlation coefficients (x = RIA, y = proposed method): r = 0.980 (RIA vs total primary bile acids), r = 0.918 (RIA vs CDC) and r = 0.989 (RIA vs C). The methods described appear more practical for use on a routine basis than methods in the literature for the calculation of the primary bile acid ratio.
journal_name
Clin Biochemjournal_title
Clinical biochemistryauthors
Papanastasiou-Diamandi A,Diamandis EP,Soldin SJdoi
10.1016/s0009-9120(84)90145-0subject
Has Abstractpub_date
1984-08-01 00:00:00pages
242-8issue
4eissn
0009-9120issn
1873-2933pii
S0009-9120(84)90145-0journal_volume
17pub_type
杂志文章abstract：OBJECTIVES:Lipoprotein(a) [Lp(a)] can be oxidized by copper in vitro in a way comparable to low-density lipoprotein (LDL). We sought to determine whether the susceptibility of Lp(a) to oxidation is correlated with the susceptibility of autologous heterogeneous LDL, with apolipoprotein(a) [apo(a)] molecular size, or wit...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(02)00438-1
更新日期：2003-03-01 00:00:00
abstract：:The Laser Nephelometer PDQTM (Hyland Division, Travenol Laboratories Inc.) and the Abbott Bichromatic Analyser 100 (Abbott Laboratories) were compared with a radial immunodiffusion method. Seventy-eight serum specimens collected during routine blood testing were aliquoted and quantitated by the three procedures descri...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(78)90126-1
更新日期：1978-06-01 00:00:00
abstract：:The clinical role of HER-2/neu, a 185 kD epithelial transmembranous protein, has evolved after the approval of the anti-HER-2/neu targeted monoclonal antibody trastuzumab (Herceptin) for the therapy of metastatic breast cancer. The extracellular domain of HER-2/neu undergoes proteolytic cleavage from the full-length p...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/s0009-9120(03)00026-2
更新日期：2003-06-01 00:00:00
abstract：BACKGROUND:Modern serum protein electrophoresis (SPE) resolves serum proteins in 6 major fractions, splitting beta (B) into beta1 (B1) and beta2 (B2). Beta-migrating monoclonal immunoglobulins (B-MC) commonly integrate into normal-looking peak shape(s) but may increase the fraction value, forming the basis for reflex t...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2018.01.021
更新日期：2018-03-01 00:00:00
abstract：:This review discusses the question: which steps are essential or need to be optimized so that maternal plasma RNA sequencing for pre-eclampsia and related syndromes will become as specific and sensitive as maternal plasma DNA sequencing for trisomy? ...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.clinbiochem.2015.03.004
更新日期：2015-10-01 00:00:00
abstract：BACKGROUND:Currently, 20 IU/L is the accepted sensitivity of over-the-counter (OTC) hCG pregnancy tests, and the only sensitivity permitted for point of care (POC) tests. These sensitivity limitations cause significant numbers of false-negative tests, which mislead women and cause them to avoid precautions needed to av...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.09.107
更新日期：2009-02-01 00:00:00
abstract：AIM:Medical laboratories are the key partners in patient safety. Laboratory results influence 70% of medical diagnoses. Quality of laboratory service is the major factor which directly affects the quality of health care. The clinical laboratory as a whole has to provide the best patient care promoting excellence. METH...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.09.011
更新日期：2009-03-01 00:00:00
abstract：:The use of point-of-care (POC) immunoassays has increased significantly and the menu of analytes continues to expand. Most of the rapid immunoassays are currently based on simple manual assay devices such as the immunochromatographic, agglutination, and immunofiltration assays. Although automated readers have recently...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.clinbiochem.2005.03.008
更新日期：2005-07-01 00:00:00
abstract：:Mycophenolate mofetil is widely used in combination with either cyclosporine or tacrolimus for rejection prophylaxis in renal and heart transplant patients. Although not monitored routinely nearly to the degree that other agents such as cyclosporine or tacrolimus, there is an expanding body of experimental evidence fo...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/s0009-9120(00)00184-3
更新日期：2001-02-01 00:00:00
abstract：:1. A relatively inexpensive semi-automated enzymatic procedure is described for the determination of total glycerol with an Auto Analyzer. Free glycerol is determined without saponification in a deproteinized supernatant. 2. The dilution of triglyceride samples during preparation is such that the samples during prepar...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(77)90232-6
更新日期：1977-02-01 00:00:00
abstract：BACKGROUND:Cystinosis is a rare autosomal recessive disorder characterized by an accumulation of intralysosomal cystine due to a defect in cystine transport across the lysosomal membrane. This disorder can be treated specifically using high doses of cysteamine. Accurate measurement of intracellular cystine content is n...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2007.02.005
更新日期：2007-06-01 00:00:00
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
更新日期：1985-02-01 00:00:00
abstract：BACKGROUND:The accurate early diagnosis of acute kidney injury (AKI) in patients with acute heart failure (AHF) is an unmet clinical need. Cystatin C might improve the early detection of AKI. METHODS:207 patients presenting to the emergency department with AHF were enrolled. Cystatin C was measured in plasma in a blin...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2017.07.016
更新日期：2017-12-01 00:00:00
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
更新日期：2011-01-01 00:00:00
abstract：OBJECTIVES:In joint degenerative diseases, the collagens are degraded by matrix metalloproteinases and protein fragments are released to serum as potential biomarkers. METHODS:A collagen type II specific neoepitope, CIIM, was identified (…RDGAAG(1053)) by mass spectrometry. Two ELISAs against the neoepitope were devel...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2011.01.001
更新日期：2011-04-01 00:00:00
abstract：:Unexpected differences in clinical and biochemical findings in two brothers occupationally exposed to the same source of lead for dissimilar lengths of time are presented. Only the brother with the shorter period of lead exposure was anemic and afflicted by nausea, vomiting, abdominal colic and arthralgia. His urinary...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(85)80090-4
更新日期：1985-04-01 00:00:00
abstract：INTRODUCTION:Critical limb ischemia (CLI) is a severe peripheral arterial disease, characterized by rest pain, ulcers and gangrene in the legs. Gas6 is a vitamin K-dependent protein, which binds and activates the tyrosine kinase receptor Axl. Gas6-mediated Axl-signaling influences endothelial activation, neointima form...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2010.04.006
更新日期：2010-07-01 00:00:00
abstract：:A retrospective study has been undertaken to assess the diagnostic value of plasma estriol (E3) determinations, as compared with determinations of other biochemical parameters, in predicting the outcome of pregnancy. The normal levels of plasma unconjugated and total E3 were determined on weekly samples obtained durin...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(81)90211-3
更新日期：1981-06-01 00:00:00
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
更新日期：1991-12-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to find a pre-interventional marker with the capacity to predict in-stent restenosis (ISR). Considering the anti-atherosclerotic role of adiponectin (APO), an adipocytokine with anti-inflammatory, anti-proliferative, anti-oxidative and anti-thrombotic properties, low plasma levels of...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.09.109
更新日期：2008-12-01 00:00:00
abstract：:The recently emerged severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) spread all over the world rapidly and caused a global pandemic. To prevent the virus from spreading to more individuals, it is of great importance to identify and isolate infected individuals through testing. Reverse transcription-quanti...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.clinbiochem.2020.12.011
更新日期：2021-01-09 00:00:00
abstract：OBJECTIVES:Bisphenol A (BPA) exposure may promote obesity, but its effect on bone mineral density (BMD) has not been reported in humans. We aimed to examine the relationships between BPA exposure, body composition, serum estradiol, leptin, osteocalcin levels and BMDs in healthy premenopausal women. DESIGN AND METHODS:...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.08.024
更新日期：2012-12-01 00:00:00
abstract：OBJECTIVES:The Golgi SNAP receptor complex member 2 (GOSR2) gene is a Golgi-associated soluble factor attachment receptor (SNARE) protein involved in intra-Golgi protein trafficking on chromosome 17q21, which is the hypertension linkage peak on the human chromosome. The aim of the present study was to assess the associ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.12.021
更新日期：2013-06-01 00:00:00
abstract：OBJECTIVES:The aim of the present study was to establish the range of chitotriosidase (CT) activity in normal individuals, patients with Gaucher disease (GD) and Niemann-Pick disease (NPD), types A or B. The kinetics of CT in these three groups was also investigated. DESIGN AND METHODS:CT activity, as well as Km, Vmax...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2004.06.008
更新日期：2004-10-01 00:00:00
abstract：OBJECTIVES:The plasma apolipoprotein B (apo B) concentrations have been considered to be a more accurate representation of atherogenic particles and it has been proposed that the formula LDL-C (mmol/L) = 0.41TC - 0.32TG + 1.70apo B - 0.27 is reliable for the estimation of LDL-C (Clin Chem 1997; 43: 808-15). We undertoo...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(00)00162-4
更新日期：2000-10-01 00:00:00
abstract：OBJECTIVES:We established population-based reference limits for plasma total homocysteine (tHcy) according to creatinine. DESIGN AND METHODS:In 7042 middle-aged and elderly subjects from the Hordaland Homocysteine Study, we used statistical modeling to establish nomograms for tHcy according to creatinine in the whole ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2007.07.014
更新日期：2007-11-01 00:00:00
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
更新日期：2005-03-01 00:00:00
abstract：BACKGROUND:Genetic variations of UDP-glucuronyltransferase 1A1 (UGT1A1) influence the concentration of serum bilirubin. We investigated the association of four common polymorphisms including UGT1A1-53(TA)(n), and common haplotypes of the UGT1A1 gene with bilirubin levels in 218 Caucasian volunteers. METHODS:Total bili...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.08.011
更新日期：2009-11-01 00:00:00
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
更新日期：2017-04-01 00:00:00
abstract：:Immunoglobulin levels are elevated in the acquired immune deficiency syndrome (AIDS) and one class, IgA, has been suggested as a marker of disease progression. IgA is composed of two subclasses, IgA1 and IgA2; circulating IgA1 is roughly 85% of the total in healthy individuals. We have attempted to determine if the su...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(91)80020-4
更新日期：1991-06-01 00:00:00
