Abstract：
OBJECTIVES:Does abnormal betaine excretion persist? DESIGN AND METHODS:Patients (10) with abnormal excretion in 1998 were recalled in 2005. Subsequent urine samples were collected on 4 days from persistently abnormal subjects. RESULTS:Half the 1998 abnormal patients were abnormal in 2005. Only 1/20 controls was abnormal (p=0.015). All patients with abnormal excretion in 1998 and 2005 had abnormal excretion on successive days while no controls did. CONCLUSIONS:High betaine excretion may be chronic and a health risk.
journal_name
Clin Biochemjournal_title
Clinical biochemistryauthors
Lever M,Atkinson W,George PM,Chambers STdoi
10.1016/j.clinbiochem.2007.03.009subject
Has Abstractpub_date
2007-07-01 00:00:00pages
798-801issue
11eissn
0009-9120issn
1873-2933pii
S0009-9120(07)00131-2journal_volume
40pub_type
杂志文章abstract：OBJECTIVES:To compare the circulating levels of matrix metalloproteinase (MMP)-2, MMP-9, tissue inhibitors of metalloproteinase (TIMP)-1, TIMP-2, and the MMP-9/TIMP-1 and MMP-2/TIMP-2 ratios in preeclampsia and gestational hypertension with those found in normotensive pregnancies. DESIGN AND METHODS:We studied 83 preg...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.04.015
更新日期：2008-07-01 00:00:00
abstract：:Lipoprotein lipase (LPL) of adipose cells is present only in membrane compartments, mainly in the Golgi apparatus. LPL is a typical secretory protein which appears to be active as a homodimer. The process of LPL synthesis and maturation requires multiple steps. LPL is synthesized in the endoplasmic reticulum as an ina...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/0009-9120(90)90034-r
更新日期：1990-10-01 00:00:00
abstract：:The current review presents the results of the most recent studies performed on different aspects of human head and neck squamous cell carcinoma, including radiosensitivity induction, efficiency improvement of monoclonal antibodies using low-intensity ultrasound, chemical compounds such as toll-like receptor (TLC) ago...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.clinbiochem.2014.05.066
更新日期：2014-09-01 00:00:00
abstract：:Urine contains an enormous amount of information. Well-standardized procedures for collection, transport, sample preparation and analysis should become the basis of an effective diagnostic strategy for urinalysis. As reproducibility of urinalysis has been greatly improved due to recent technological progress, preanaly...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/j.clinbiochem.2016.10.016
更新日期：2016-12-01 00:00:00
abstract：OBJECTIVES:The current study aimed at the rapid identification of the copy number of α-globin genes for the diagnosis of α-thalassemia. DESIGN AND METHODS:To identify the copy number of α-globin genes in α-thalassemia, we developed a novel method using a multiplex polymerase chain reaction (PCR) in combination with th...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.02.006
更新日期：2012-07-01 00:00:00
abstract：OBJECTIVE:We used single-strand conformational polymorphism (SSCP) to screen for mutations at nucleotides 833 and 919 of the cystathionine beta-synthase (CBS) gene in 13 patients with homocystinuria and 11 of their relatives. METHODS:Exon 8 of genomic DNA was selectively amplified by PCR using primers derived from int...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(96)00045-8
更新日期：1996-10-01 00:00:00
abstract：OBJECTIVES:Accurate measurement of IgG subclass (IgGSc) levels are essential to aid in the diagnosis of disease states such as primary immunodeficiencies. However, there is no single standardisation of nephelometric and turbidimetric assays for these analytes and two reference materials have been utilised. We expand on...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2013.07.014
更新日期：2013-11-01 00:00:00
abstract：:A method is described for xylose determination on the Ciba-Corning 550 Express that utilizes the slower enzymatic action of glucose dehydrogenase (GDH) on D-xylose, after prior removal of glucose. Glucose oxidase is added to serum or urine and incubated for 120 min at 37 degrees C. After incubation, a perchloric acid ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(94)90006-x
更新日期：1994-02-01 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:Laboratory confirmation of alpha-1-antitrypsin (A1AT) deficiency may be achieved by multiple methods. Here, we compare the relative comprehensiveness and efficiency of pathogenic variant (PV) detection of four different protocols utilized at different diagnostic centres in Canada. METHODS:Diagnostic results...
journal_title：Clinical biochemistry
pub_type： 杂志文章,多中心研究
doi：10.1016/j.clinbiochem.2020.05.001
更新日期：2020-07-01 00:00:00
abstract：OBJECTIVES:To evaluate the analytical performance of the testosterone assay performed on the Bayer immuno 1 system from Bayer Corporation. DESIGN AND METHODS:The precision was measured using three Bayer TESTpoint Ligand controls, three Medical Decision Pools and the Bayer SETpoint Testosterone calibrators. The lineari...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(97)00140-9
更新日期：1998-02-01 00:00:00
abstract：:To ensure effective antimicrobial or tumouricidal function, phagocytic cells must maintain their cytoplasmic pH (pHi) at a level conductive to optimal intracellular enzyme activity. The mechanisms by which neutrophils and macrophages regulate their cytoplasmic pH include bicarbonate-independent ion transport systems, ...
journal_title：Clinical biochemistry
pub_type： 杂志文章,评审
doi：10.1016/0009-9120(91)80014-t
更新日期：1991-06-01 00:00:00
abstract：OBJECTIVE:To develop a tool to assess the clinical accuracy of glucose meter performance using an insulin dosing protocol to assess the frequency and extent of error in insulin dose categories. METHODS:Retrospective comparison of 1815 glucose meter and central laboratory glucose results obtained from 1698 critically i...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2019.06.001
更新日期：2019-08-01 00:00:00
abstract：AIMS:There is increasing interest in using fructosamine measurements in screening for or managing diabetes, yet uncertainty remains as to whether these measurements should be corrected for variation in serum protein concentrations. METHODS:We considered all sets of simultaneous measurements of fructosamine, albumin, t...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.10.014
更新日期：2017-02-01 00:00:00
abstract：:We present data comparing the Roche CEA radioimmunoassay (RIA) utilizing ultrafiltration and the Abbott CEA immunoradiometric assay (IRMA) methods for standard curve sensitivity, analytical reproducibility, recovery (pre and post extraction), dilution linearity, and patient correlation. The Roche intra- and inter-assa...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(82)97007-2
更新日期：1982-10-01 00:00:00
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 m...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(85)80103-x
更新日期：1985-06-01 00:00:00
abstract：OBJECTIVES:Proinflammatory cytokines, matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) play a role in left ventricular (LV) structural remodeling. We aimed to investigate the effects of cardiac resynchronization therapy (CRT) on serum levels of amino-terminal prohormone B-type natriuretic peptide (N...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2012.11.002
更新日期：2013-02-01 00:00:00
abstract：OBJECTIVES:It has recently been suggested that when adjusting doses of cyclosporine (CsA), determining its concentration in blood samples taken 2 h postdose (C(2)) is more clinically beneficial than using the predose concentration (C(0)). We determined C(0) and C(2) concentrations of CsA and their metabolites in sample...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(00)00147-8
更新日期：2000-07-01 00:00:00
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
更新日期：2010-01-01 00:00:00
abstract：:We have evaluated the precision of the Ektachem 400 thin film enzymic creatinine method and compared it to that obtained for an AutoAnalyzer II (AAII) picric acid procedure. The results of the study show that the Ektachem method yields imprecise creatinine values over the low concentration range (40-240 mumol/L). Run-...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(85)80072-2
更新日期：1985-12-01 00:00:00
abstract：UNLABELLED:Antioxidant capacity testing is commonly used in clinical investigations to provide an estimate of in vitro antioxidant capacity of biosamples. Although beneficial to measure the synergistic contribution of all compounds with antioxidant functionality, assessing the capacity of non-protein fractions or small...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2014.06.021
更新日期：2014-10-01 00:00:00
abstract：OBJECTIVES:Breast cancer is the most common malignancy among Egyptian women. The aim of this study is to evaluate the role of both telomerase and TPS estimation in assessment of breast cancer. METHODS:The study included 40 patients with breast cancer, and 20 patients with benign breast diseases. Telomerase activity in...
journal_title：Clinical biochemistry
pub_type： 临床试验,杂志文章
doi：10.1016/s0009-9120(01)00253-3
更新日期：2001-09-01 00:00:00
abstract：OBJECTIVES:The haphazard distribution of fibrous tissue can interfere with quantitative methods for evaluating hepatic fibrosis. Inter-sample variation may represent a crucial issue when hydroxyproline measurement is used to quantify fibrosis. A comparative study of the hydroxyproline levels in normal and fibrotic rats...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2006.08.002
更新日期：2006-12-01 00:00:00
abstract：BACKGROUND:Therapeutic drug monitoring (TDM) of the widely prescribed antidepressant fluoxetine (FLU) is recommended in certain situations, such as occurrence of toxicity, inadequate response or suspect of poor adherence. Dried blood spot (DBS) sampling is an increasingly studied alternative for TDM, particularly for o...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2017.10.002
更新日期：2018-02-01 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：:Urinary amylase was estimated by chromogenic (amylochrome Roche) as well as enzymatic methods (SKI and Beckman: substrate starch and substrate maltotetraose respectively). Random and timed urines (24 hour collections) were analysed. Clearances of amylase gave different results dependent upon the amylase-test used and ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(79)80125-3
更新日期：1979-12-01 00:00:00
abstract：OBJECTIVES:Regulatory T cells (Tregs) which may indicate operational tolerance provide a promising biomarker for individualization of immunosuppression. Naturally thymus-derived Tregs (nTregs) represent the major suppressive phenotype and can be identified by their demethylation status in the Tregs Specific Demethylate...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.05.019
更新日期：2016-10-01 00:00:00
abstract：OBJECTIVES:Researchers have proposed that cancer stem cells (CSCs) are the driving force of tumorigenesis, recurrence, and metastases, contributing to the failure of some cancer treatments. Water bath hyperthermia, a novel treatment for cancer, can be highly effective when combined with chemotherapy, radiotherapy, or i...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2013.08.023
更新日期：2013-11-01 00:00:00
abstract：OBJECTIVES:This study has been conducted to develop a proper and relatively simple method for purification of three major forms of beta-hCG from urine to use as clinical calibrators and also to produce anti-beta-hCG polyclonal antibodies against these purified forms. DESIGN AND METHODS:Major beta-hCG forms from urine ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.05.019
更新日期：2009-09-01 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
