Abstract:
:We developed a time-resolved-fluoro-immunoassay to measure cortisol binding globulin (CBG) in serum. It is a microtitre plate, solid phase, reagent excess, sandwich assay in which the same polyclonal antiserum is used as a source of capture and labeled antibodies. The results of this assay were shown to be reliable and were fully comparable with those obtained by a commercially available kit. As a reflection of the free cortisol concentration we measured cortisol and CBG concentrations in serum and calculated the Free Cortisol Index (FCI) = [cortisol]serum/[CBG]serum.100. The clinical use of this parameter, as a screening test for disturbances of the pituitary-adrenal axis, was investigated in different groups of subjects: healthy men and women, women using oral contraceptives, pregnant women at term, patients with thyroidal illnesses, patients using anti-epileptic drugs and patients suffering from adrenal diseases. In a number of groups we compared the FCI results with measurements of cortisol in saliva, another parameter used as an estimate of the concentration of free cortisol in blood. Our conclusion is that the FCI, in contrast to a total cortisol measurement alone, can prevent unnecessary further testing.
journal_name
Clin Chem Lab Medjournal_title
Clinical chemistry and laboratory medicineauthors
Bonte HA,van den Hoven RJ,van der Sluijs Veer G,Vermes Idoi
10.1515/CCLM.1999.023keywords:
subject
Has Abstractpub_date
1999-02-01 00:00:00pages
127-32issue
2eissn
1434-6621issn
1437-4331journal_volume
37pub_type
杂志文章abstract:BACKGROUND:Serum free light chain (sFLC) measurements are increasingly important in the context of screening for monoclonal gammopathies, prognostic stratification, and monitoring of therapy responses. At the same time, analytical limitations have been reported with the currently available nephelometric and turbidimetr...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2017-0339
更新日期:2018-01-26 00:00:00
abstract::Although the perioperative event rate has declined over the past 30 years, as a consequence of the developments in anesthesiology and surgical techniques, perioperative cardiovascular complications are still a significant clinical problem. At the end of the last century, a pooled analysis of several large studies foun...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2013-0900
更新日期:2014-07-01 00:00:00
abstract:BACKGROUND:Proteogenomics is an emerging field at the intersection of genomics and proteomics. Many variant peptides corresponding to single nucleotide variations (SNVs) are associated with specific diseases. The aim of this study was to demonstrate the feasibility of proteogenomic-based variant peptide detection in di...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2016-0947
更新日期:2017-08-28 00:00:00
abstract:BACKGROUND:Mid-regional pro-adrenomedullin (MR-proADM) and endothelin-1 have been shown to predict mortality of patients with acute myocardial infarction. However, the prognostic value of both biomarkers in predicting long-term clinical events after acute myocardial infarction remains unclear. METHODS:In a prospective...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2008.040
更新日期:2008-01-01 00:00:00
abstract:BACKGROUND:This study compared automated vs. manual tissue grinding in terms of RNA yield obtained from oral mucosa biopsies. METHODS:A total of 20 patients undergoing uvulectomy for sleep-related disorders and 10 patients undergoing biopsy for head and neck squamous cell carcinoma were enrolled in the study. Samples ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm.2009.070
更新日期:2009-01-01 00:00:00
abstract::Thrombophilia can be identified in about half of all patients presenting with venous thromboembolism (VTE). Thrombophilia screening for various indications has increased tremendously, but whether the results of such tests help in the clinical management of patients is uncertain. Here, current recommendations for throm...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章,评审
doi:10.1515/CCLM.2010.367
更新日期:2010-12-01 00:00:00
abstract::A questionable scientific approach to measuring at low concentrations and inappropriate censoring of results below certain cut-offs have resulted in the dichotomous classification of troponin assays based on their so-called analytical sensitivity. The definition of "high-sensitivity" cardiac troponin is flawed. Eviden...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2017-0025
更新日期:2017-10-26 00:00:00
abstract:BACKGROUND:Potassium is an important serum ion that is frequently assayed in clinical laboratories. Quality assurance requires reference methods; thus, the establishment of a candidate reference method for serum potassium measurements is important. METHODS:An inductively coupled plasma mass spectrometry (ICP-MS) metho...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2016-0803
更新日期:2017-08-28 00:00:00
abstract::The application of turbidimetric homogeneous immunoassays made the determination of several plasma components widely available. The sensitivity and accuracy of these assays are appropriate enough for routine laboratory use; however, in the case of many pathologically high concentration samples, prozone effect (high do...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.1999.076
更新日期:1999-04-01 00:00:00
abstract::It is not clear whether brain natriuretic peptide (BNP) or N-terminal proBNP (NT-proBNP) is superior as a diagnostic and prognostic indicator in cardiac diseases. Here, we compare the clinical correlations of both peptides in a population of 92 ambulatory patients with heart failure, using a well-established immunorad...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2002.130
更新日期:2002-08-01 00:00:00
abstract:BACKGROUND:The presence of IgA antibodies to tissue transglutaminase (anti-tTg) is associated with variable risk for celiac disease. The use of common multiples of the upper limit of normal (ULN) has been suggested to optimize diagnostic pathways as well as improve harmonization between assays. METHODS:The characteris...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0348
更新日期:2016-02-01 00:00:00
abstract::Brain natriuretic peptide is proposed as a biochemical marker which could provide a useful screening test to select patients for further cardiac investigations in heart failure. The applicability of such a biochemical test in clinics, hospital wards, and clinical laboratories is dependent on its ease of use and on the...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2000.076
更新日期:2000-06-01 00:00:00
abstract::Laboratory Medicine organizations and their professional members have a goal and responsibility to benefit the health and wellbeing of the patients and communities they serve. Newer genetics and biochemical techniques raise significant issues of community concern, impacting on privacy, informed consent, access to and ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2007.199
更新日期:2007-01-01 00:00:00
abstract::The importance of proper consumption of dietary folate for human health has been highlighted by an extensive number of publications over several decades. Fortification of grain products with folic acid was initiated with the specific intent to prevent neural tube defects, and the scope of this endeavor is unique in th...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章,评审
doi:10.1515/cclm-2012-0561
更新日期:2013-03-01 00:00:00
abstract::ISO 15189's particular requirements for quality management in medical laboratories provide guidance for (a) relating performance specifications to the intended use of a test or examination procedure, (b) designing internal quality control (IQC) procedures to verify the attainment of the intended quality of test result...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2010.024
更新日期:2010-01-01 00:00:00
abstract::The detection and quantification of amyloidogenic monoclonal light chains are necessary for the diagnosis and evaluation of response to treatment in AL amyloidosis. However, the amyloid clone is often small and difficult to detect. We report the case of a 68-year-old man who was referred to our Center in April 2013 af...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0847
更新日期:2016-06-01 00:00:00
abstract:BACKGROUND:Celiac disease (CD) is an immune-mediated disorder of the small bowel in which gluten and related cereal ingestion leads to chronic inflammation and damage to the small bowel mucosa in genetically susceptible individuals. The presence of IgA type tissue-transglutaminase antibodies (IgA-anti-tTG) in individua...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2011.164
更新日期:2011-06-01 00:00:00
abstract:BACKGROUND:There are several methods for calculating serum osmolality, and their accordance with measured osmolality is the subject of controversy. METHODS:The concentrations of sodium, potassium, glucose, blood urea nitrogen (BUN) and osmolalities of 210 serum samples were measured. Two empirical equations were deduc...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2005.109
更新日期:2005-01-01 00:00:00
abstract::Immunological reactions are influenced by various factors including antigens, antibodies and other variables. We focused on two items: i) matrix effects, especially of detergents and ii) temperature effects: preheating sera, especially effects on rheumatoid factor (RF) measurement and false-positive reactions in ELISA...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2004.010
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:Inflammation plays an imperative role in the etiology of cardiovascular diseases (CVD). The role of cytokines in the development and progression of idiopathic dilated cardiomyopathy (IDCM) is still uncertain. The current study was conducted to evaluate the association of tumor necrosis factor-α (TNF-α) -238G...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章,meta分析
doi:10.1515/cclm-2014-0502
更新日期:2015-02-01 00:00:00
abstract::Many limitations and conflicting results have cast serious doubts on the validity of cerebrospinal fluid tau and Abeta42 levels for the biological diagnosis of Alzheimer's disease, particularly extreme variations of the reference limits found by unrelated groups as a consequence of different reference populations used...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2004.071
更新日期:2004-04-01 00:00:00
abstract:BACKGROUND:Accurate and early diagnosis of tuberculosis (TB) is of major importance in the management and control of TB. Because the conventional bacteriological diagnosis of TB has several limitations, nucleic acid amplification (NAA) tests have emerged as promising alternatives. A potential problem with NAA tests is ...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2010.296
更新日期:2010-10-01 00:00:00
abstract:BACKGROUND:In recent years, fatty acid ethyl esters (FAEEs) and ethyl glucuronide (EtG) in meconium emerged as reliable, direct biological markers for establishing gestational ethanol exposure. We investigated whether EtG in maternal hair measured during the three trimesters of pregnancy correlated with EtG and FAEEs i...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2015-0516
更新日期:2016-03-01 00:00:00
abstract:BACKGROUND:The compatibility of immunoassay tests in different sample matrices is extremely important during the assay validation process. In this study, we investigated the interchangeability of some Access (and therefore all the UniCel Family platforms) assays between serum and plasma. METHODS:We tested approximatel...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2008.032
更新日期:2008-01-01 00:00:00
abstract::Drug-induced cardiotoxicity is a major clinical problem; cardiotoxic drugs may induce both cardiac dysfunction and myocardial injury. Several recent studies reported that cardiac troponins measured with high-sensitivity methods (hs-cTn) can enable the early detection of myocardial injury related to chemotherapy or abu...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2020-0566
更新日期:2020-08-26 00:00:00
abstract:BACKGROUND:Squamous cell carcinoma antigen-immunoglobulin M (SCCA-IgM) is a useful biomarker for the risk of development of hepatocellular carcinoma (HCC) in patients with cirrhosis due to its progressive increase associated to HCC evolution. In patients with cirrhosis, other assays have been affected by interfering re...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2010.044
更新日期:2010-02-01 00:00:00
abstract::Background The present study was undertaken to evaluate the clinical impact of a thyroglobulin (Tg) minirecovery test (Tg-mRec) in a large series of differentiated thyroid carcinoma (DTC) patients treated and monitored homogeneously in a tertiary referral center. Methods Included were 1120 serum samples from 798 DTC p...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/cclm-2018-1390
更新日期:2019-07-26 00:00:00
abstract::Primary biliary cholangitis (PBC), also known as primary biliary cirrhosis, is an autoimmune disease of the liver characterized by anti-mitochondrial antibodies (AMA) in 90%-95% of patients. The aim of this study was to evaluate the diagnostic value of several serum biomarkers in patients with PBC but negative for AMA...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章,评审
doi:10.1515/cclm-2017-0249
更新日期:2017-11-27 00:00:00
abstract::Heart-type fatty acid-binding protein (H-FABP) is a low molecular weight cytoplasmic protein and present abundantly in the myocardium. When the myocardium is injured, as in the case of myocardial infarction, low molecular weight cytoplasmic proteins including H-FABP are released into the circulation and H-FABP is dete...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2000.034
更新日期:2000-03-01 00:00:00
abstract::The use of highly sensitive immunometric methods in clinical laboratories to assay anti-thyroid antibodies has progressively expanded in recent years but it is not known whether the new techniques have improved the analytical variability connected with the preceding methodologies. The Italian Society of Laboratory Med...
journal_title:Clinical chemistry and laboratory medicine
pub_type: 杂志文章
doi:10.1515/CCLM.2002.098
更新日期:2002-06-01 00:00:00