Abstract：
:We describe a simple direct extraction method for the gas-liquid chromatography determination of serum valproic acid. The working range for the assay is 2-180 mg/L and our within-run precision was 5.8 and 4.3% at the 40 and 90 mg/L concentrations respectively. Hemolyzed and lipemic sera as well as samples from patients with hyperbilirubinemia and from patients with decreased renal function were put through the assay and no interfering peaks were noted. Interference occurred when teflon-lined screw caps were used during the extraction step. The method was proven to be accurate by linear regression analysis of samples containing weighed-in amounts of valproic acid. The above assay was compared to an enzyme immunoassay technique (EMIT). The working range for the latter is 10-150 mg/L and the with-run precision was 10.8 and 5.9% and 90 mg/L concentration respectively. Samples were run by both the gas-liquid chromatograph and enzyme immunoassay methods and gave very similar results over the range 16-139 mg/L.
journal_name
Clin Biochemjournal_title
Clinical biochemistryauthors
Leroux M,Budnik D,Hall K,Irvine-Meek J,Otten N,Seshia Sdoi
10.1016/s0009-9120(81)90772-4subject
Has Abstractpub_date
1981-04-01 00:00:00pages
87-90issue
2eissn
0009-9120issn
1873-2933pii
S0009-9120(81)90772-4journal_volume
14pub_type
杂志文章abstract：OBJECTIVES:The aim of this study was to measure soluble receptor for advanced glycation end products (sRAGE) in plasma and synovial fluid of knee osteoarthritis (OA) patients and to determine the correlation between sRAGE levels and disease severity. DESIGN AND METHODS:Thirty-six OA patients and 15 healthy controls we...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2010.07.007
更新日期：2010-09-01 00:00:00
abstract：OBJECTIVES:Pseudoxanthoma elasticum (PXE) is a hereditary disorder predominantly affecting the skin, retina and vascular system. The aim of this study was to measure cell adhesion molecules in PXE patients. DESIGN AND METHODS:Soluble P-, E- and L-selectins were measured in 61 non-consanguineous PXE patients. The distr...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2007.12.009
更新日期：2008-04-01 00:00:00
abstract：:The ES 300 system, a fully automated multichannel immunoassay analyzer, was evaluated simultaneously for 9 weeks in four major centers. Precision, accuracy, carryover, comparison to in-house methods, and interferences were assessed for the following 17 tests: T4, T3, FT4, TSH, TBK, TBG, LH, FSH, prolactin, HCG, digoxi...
journal_title：Clinical biochemistry
pub_type： 杂志文章,多中心研究
doi：10.1016/0009-9120(93)90017-z
更新日期：1993-02-01 00:00:00
abstract：OBJECTIVES:Oxidative stress plays a role in the pathogenesis in patients with HCV infection. The objective of this study was to evaluate oxidant and antioxidant biomarkers in patients with HCV. DESIGN AND METHODS:Serum malonaldehyde (MDA) and nitric oxide (NO) levels and the activities of myeloperoxidase (MPO), aryles...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2009.06.007
更新日期：2009-09-01 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：OBJECTIVES:Hypertension (HT) is a complex disorder influenced by both genetic and environmental factors. Recent genome-wide association studies have identified a major risk locus for atherosclerosis on chromosome 9p21.3. SNPs within the coding sequences of CDKN2A/B and the long non-coding RNA CDKN2B-AS1 could potential...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2016.02.012
更新日期：2016-07-01 00:00:00
abstract：BACKGROUND:Polycyclic aromatic hydrocarbons (PAHs), some ubiquitous environmental contaminants are capable to cause oxidative stress, during its metabolism. It is believed that many diseases that have a common origin in oxidative stress begin in childhood. Considering oxidative stress evolved during PAHs metabolism as ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2007.11.017
更新日期：2008-02-01 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：OBJECTIVES:Elevated advanced glycation endproducts (AGEs) are implicated in diabetic complications. Methylglyoxal-derived hydroimidazolone (MG-H) is one of the most abundant AGEs in vivo. Our objective was to develop a time-saving, specific method to measure free MG-H in plasma and determine its levels in complication-...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.12.016
更新日期：2009-05-01 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：OBJECTIVES:The steroids estradiol (E2), estrone (E1), and estriol (E3) are the major estrogens. E1/E2 and their metabolite 16-hydroxyestrone (16-OHE1, known to be carcinogenic) could be involved in the development of many cancers including human breast cancer. The aim of the current study was to develop a rapid and sim...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.02.009
更新日期：2008-06-01 00:00:00
abstract：OBJECTIVES:The new immunochemistry cobas e 801 module (Roche Diagnostics) was developed to meet increasing demands on routine laboratories to further improve testing efficiency, while maintaining high quality and reliable data. DESIGN AND METHODS:During a non-interventional multicenter evaluation study, the overall pe...
journal_title：Clinical biochemistry
pub_type： 杂志文章,多中心研究
doi：10.1016/j.clinbiochem.2018.05.019
更新日期：2018-08-01 00:00:00
abstract：OBJECTIVES:The aim was to study the influence of sampling time, food intake and sleep on tests used to screen for and monitor conditions of iron deficiency and overload. DESIGN AND METHODS:The 24 h variations of iron, transferrin, transferrin saturation (TS) and ferritin were studied in seven healthy individuals durin...
journal_title：Clinical biochemistry
pub_type： 临床试验,杂志文章
doi：10.1016/j.clinbiochem.2010.08.023
更新日期：2010-11-01 00:00:00
abstract：OBJECTIVE:This study aimed at evaluating Elecsys free triiodothyronine (FT3) assay performed on an Elecsys 2010 system, while paying special attention to age relationship in euthyroid subjects. DESIGN AND METHODS:FT3 levels were measured in 149 euthyroid control subjects aged between 2 and 92 years old, 33 hyperthyroi...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(98)00024-1
更新日期：1998-07-01 00:00:00
abstract：OBJECTIVES:This study investigates how some of human physiological parameters, in particular sex and daytime, can contribute to the normal variation in blood gene expression. DESIGN AND METHODS:The expressions of two genes: SOD1 (Cu/Zn) and SOD2 (Mn) in white blood cells of 19 healthy individuals (10 men and 9 women) ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2008.08.064
更新日期：2008-11-01 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：OBJECTIVE:We developed assays for measurement of urinary betaLH and betaFSH under collection and storage conditions typical of non-clinical research settings. DESIGN AND METHODS:IEMAs for free betaLH and total betaFSH were validated by standard methods. Stability of urinary betaLH and betaFSH was tested across freeze-...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2006.08.009
更新日期：2006-11-01 00:00:00
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
更新日期：2012-12-01 00:00:00
abstract：OBJECTIVES:We studied the stability of maternal blood markers for screening for Down syndrome (alpha-fetoprotein, unconjugated estriol, intact human chorionic gonadotropin (hCG) and free beta-human chorionic gonadotropin) upon repeated freeze-thaw cycles. DESIGN AND METHODS:Forty-three samples collected from second tr...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(97)00095-7
更新日期：1997-10-01 00:00:00
abstract：OBJECTIVES:We describe a quality assurance procedure to maximize the value of oligonucleotide microarray expression profiles. DESIGN, METHODS, AND RESULTS:Background microarray noise was 82.2+/-54.5 and 51.8+/-12.4 units, respectively, before and after enacting the program (P<0.0001). We also noted improved concordanc...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2005.04.010
更新日期：2005-07-01 00:00:00
abstract：:Increased hemoglobin A1 (HbA1) occurs in diabetes mellitus as a direct consequence of hyperglycemia, which causes postsynthetic modification of hemoglobin proportional to blood glucose concentration. Glycosylation of hemoglobin is demonstrable also in vitro, not only by glucose, but with other reducing sugars such as ...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(82)90556-2
更新日期：1982-06-01 00:00:00
abstract：OBJECTIVES:Plasma retinol-binding protein (RBP) has been linked to insulin resistance and cardiovascular risk, yet little is know of its natural variation in plasma. We examined this in normal subjects and compared plasma levels and variability in lean subjects and subjects with the metabolic syndrome. METHODS:We esta...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2007.03.021
更新日期：2007-07-01 00:00:00
abstract：:Plasma, erythrocyte, and leucocyte magnesium (Mg) concentration, as well as urinary Mg, calcium (Ca), and phosphorus (P) excretion were determined in male subjects with elevated diastolic blood pressure (DBP) > 90 mmHg. These parameters were compared to those in normotensive age-matched (DBP < 85 mmHg) and drug-treate...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/0009-9120(93)90027-4
更新日期：1993-06-01 00:00:00
abstract：:This retrospective multicenter study in patients with chronic myeloid leukemia in chronic phase was undertaken to confirm the clinical relevance of imatinib plasma concentrations monitoring in daily practice. Forty-one patients, with 47 imatinib plasma measurements, were analyzed during treatment with imatinib given a...
journal_title：Clinical biochemistry
pub_type： 杂志文章,多中心研究
doi：10.1016/j.clinbiochem.2016.12.006
更新日期：2017-05-01 00:00:00
abstract：:Steroids play an important role in sperm production and quality. These hormones have been extensively studied in blood, but poorly investigated in semen. The purpose of our study was to evaluate the relationship between sperm quality and steroid profiles in blood and semen in a small cohort of young Swiss men. Another...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2018.03.008
更新日期：2018-12-01 00:00:00
abstract：OBJECTIVES:Eales' disease (ED) is an idiopathic retinal vasculitis condition, which affects retina of young adult males. The histopathological hallmark in ED is the adhesion of leukocytes to the endothelium and the infiltration of these cells into the retinal parenchyma. Phagocyte generated free radicals have been impl...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(03)00058-4
更新日期：2003-07-01 00:00:00
abstract：OBJECTIVES:The liver has tremendous regenerative capacity but can be damaged by toxins, such as ethanol (EtOH). It has long been known that EtOH inhibits liver regeneration. Recent work demonstrates that the proinflammatory cytokine, tumor necrosis factor ( (TNF), is required for normal liver regeneration, as well as f...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/s0009-9120(99)00057-0
更新日期：1999-10-01 00:00:00
abstract：OBJECTIVE:The immune-inflammatory system has been implicated in the pathogenesis of diabetic nephropathy; however, many of the mechanisms involved remain unclear. Chitotriosidase enzyme is an active human chitinase and a major protein product of activated macrophages. Although playing an important role in innate and ac...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2015.11.009
更新日期：2016-04-01 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：OBJECTIVE:The purpose of our study was to investigate the serum levels of soluble a-proliferation-inducing ligand (sAPRIL) in patients with colorectal cancer (CRC), benign intestinal disease and healthy volunteers and explore the potential possibility of sAPRIL severing as a CRC biomarker. METHODS:Our investigation wa...
journal_title：Clinical biochemistry
pub_type： 杂志文章
doi：10.1016/j.clinbiochem.2013.06.008
更新日期：2013-10-01 00:00:00
