Abstract:
:The most generalized methods in enzymology are based on the quantitative assay of compounds, substrate or coenzyme, by spectrophotometry without any separation. Such a method is ruled out if the colorimetric reaction is not specific of the compound. In liver enzymology, aside the classical metabolic pathways, such assays are difficult to apply, especially when several metabolic steps are investigated. It is therefore necessary to use separative methods to isolate the metabolized substrate(s). For instance, the reductive catabolism of corticosterone leads to fourteen isomers (two dihydrocompounds, four tetrahydrocompounds and eight hexahydrocompounds) in which their respective productions are sex and age-linked. A position isomer of corticosterone, the 18-hydroxy-11-deoxy-corticosterone, follows the same reductive route. In adrenals some reduced metabolites arise from these two steroid hormones and are age dependent. When such metabolites are amenable to volatilization for gas chromatography, the interfacing of the gas chromatograph to the mass spectrometer allows to identify each compound introduced in the spectrometer. Among the ions produced by fragmentation of a compound or of a family of compounds, several specific fragments can be selected to be monitored along the chromatographic run leading to mass peaks which are quantitatively proportional to the amount of compounds, as far as other foreign molecules do not contribute fo fragment productions. These methods called mass fragmentography or multiple ion detection, or selected ion monitoring, allow with the help of all the resources of gas chromatography such the derivatization of studied molecules with heavy isotope labeled reagents to use the same unlabeled derivatized molecules as carriers and internal standards at once. This method allows to quantitate at the level of the picomolecule or less. Examples will be given with the study of the metabolism hormone steroids and xenobiotic compounds by the liver and adrenals in the animal and by isolated liver and adrenal cell cultures.
journal_name
Ann Biol Clin (Paris)journal_title
Annales de biologie cliniqueauthors
Padieu P,Maume BFsubject
Has Abstractpub_date
1976-01-01 00:00:00pages
63-77issue
1eissn
0003-3898issn
1950-6112journal_volume
34pub_type
杂志文章abstract::Our data suggest that the hyperhomocysteinemia and/or increased plasma level of lipoprotein Lp(a) are risk factors for coronary heart disease. We investigated 178 patients who underwent complete cardiac examination comprising coronary angiography and biological analysis (CT, HDL-c, LDL-c, TG, and apoAI, apoB, homocyst...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:2002-09-01 00:00:00
abstract::Gas-liquid chromatography has been used directly on clinical specimens as a method for presumptive diagnosis of anaerobic infections. This technique proved to be valuable and reliable. Combined with a Gram stain, it offers the possibility to differentiate in less than 1 hour aerobic from anaerobic infections by means ...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1983-01-01 00:00:00
abstract::The aim of this study was to evaluate the automated urine test strip analyzer Aution Max AX 4280 which uses strips able to measure 12 urinary parameters. For precision study, we considered glucose, protein, blood, leukocytes, nitrite, and pH and the four first were compared with usual methods: chemical measurement or ...
journal_title:Annales de biologie clinique
pub_type: 临床试验,杂志文章
doi:
更新日期:2005-11-01 00:00:00
abstract::Determination of sex-hormone-binding-globulin was performed by three methods: binding, electroimmunodiffusion and DELFIA methods. Results of normal and pathological values correlated well with the three techniques. ...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1990-01-01 00:00:00
abstract::With the general tendency that's to say the grouping of laboratories as technical divisions and the accreditation's obligation, the handling of urinary sample preservation's conditions is a major concern. Urinary sample preservation, with or without boric acid, for UF 1000i urinalysis was the purpose of this study. No...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2011.0625
更新日期:2011-09-01 00:00:00
abstract::The purpose of this study was to evaluate the cut-off value of brain natriuretic peptide (BNP) assayed with AxSYM BNP assay (Abbott). 86 patients have been included (mean age of 66 years). The clinical sensibility was 100% at 100 ng/L versus 80% at 250 ng/L. The clinical specificity was 66% at 100 ng/L versus 92% at 2...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:2005-03-01 00:00:00
abstract::The simultaneous presence of homogeneous and heterogeneous reactions at different binding sites of a multiepitope antigen makes the description of the kinetic parameters of the so called "one step" solid phase immunometric assays complex. The authors extended the "one step" approach to the concept of the "soluble sand...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1990-01-01 00:00:00
abstract::Monoclonal antibodies have been raised against porcine LH receptor and allowed to clone the corresponding messenger RNA from testicular cells. Cross hybridisation with the LH receptor clone allowed to isolate a clone corresponding to the human TSH receptor from thyroids. The structure of both receptors have been deter...
journal_title:Annales de biologie clinique
pub_type: 杂志文章,评审
doi:
更新日期:1992-01-01 00:00:00
abstract::The analyzers have been defined as follows: the analyzers are multiparametric (at least 5 parameters available simultaneously), selective, operating patient by patient, list price on May 1, 1984 below 1,000,000 francs, and distributed in France after January 1, 1981. This definition applies in particular to systems al...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::Schistocytes result from red cell fragmentation. The identification of the schistocytes is critical for appropriate management of the patients. We report the results of a survey about the determination of schistocytes. The analysis of the answers of 24 well-trained biologists points out the different approaches used t...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:2001-01-01 00:00:00
abstract::A 58-year-old patient, without any notable medical history, except for alcoholism and treated hypertension, developed anemia and leukopenia with macrocytosis. Folate deficiency was diagnosed and subsequently treated. Despite folate supplementation, the hematological parameters did not normalize. Further diagnosis inve...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2013.0863
更新日期:2013-07-01 00:00:00
abstract::Hemoglobin Alc is the result of non-enzymatic binding of a glucose molecule at the NH2 terminal of the beta chain. Assay of glycosylated hemoglobin is of great utility for the control efficacity of antidiabetic treatments, since such levels provide the clinician with an excellent index of glucose metabolism over the w...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1981-01-01 00:00:00
abstract::Spontaneous red blood cell (RBC) fragmentation occurs in some membrane erythropathies like hereditary elliptocytosis (HE); this phenomenon is produced in normal RBC by heating at 49 degrees C, but not at temperatures below this limit; fragmentation is usually quantified by counting the number of fragments/1000 RBC und...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1992-01-01 00:00:00
abstract::Type 2 diabetes (T2DM) associated with non-alcoholic fatty liver disease (NAFLD) increases cardiovascular risk. Complex and subtle connections are established between hepatic dysfunction and adipose tissue hyperactivity. This relationship is mediated by insulin resistance, dyslipidemia and inflammation. Recently incre...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2019.1436
更新日期:2019-06-01 00:00:00
abstract::Salmonelloses are becoming more frequented. To date, very few cases of aneurisms or vascular grafts infections have been described. We report the rare case of an extradigestive manifestation, due to Salmonella enteritidis affecting a patient with Behçet disease. The biological diagnosis is based on microorganism isola...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2010.0405
更新日期:2010-01-01 00:00:00
abstract::The purpose of this study is to find, besides the determination of lactate in blood, a suitable and specific indicator of brain damage in newborn. Accordingly, we studied the total creatine kinase (CK) activity, by the method of Rosalki, and its subunit isoenzymes BB (CK BB) by fluorescence following electrophoresis o...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1980-01-01 00:00:00
abstract::Biermer's disease is an autoimmune atrophic gastritis of the fundus predominantly responsible for a malabsorption of vitamin B12. Despite its association with several autoimmune disorders, few observations have reported an association with autoimmune hemolytic anemia (AIHA). We report a case of Biermer's disease assoc...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2012.0713
更新日期:2012-07-01 00:00:00
abstract::Caveolae are small pockets or invaginations localized at the plasma membrane. They are enriched in glycosphingolipids, cholesterol, sphingomyelin and lipid-enchored membrane proteins, and they are characterized by a light buoyant density and resistance to solubilization by Triton X-100 at 4 C. Caveolins are the princi...
journal_title:Annales de biologie clinique
pub_type: 杂志文章,评审
doi:
更新日期:2000-03-01 00:00:00
abstract::Using gas chromatography, we measured the concentrations of amino acids in a group of 80 selected subjects: we present the plasma values which we obtained, as well as those of other authors. Various comparisons were made, according to the age and/or sex of the subjects. We found that the plasma levels of valine, leuci...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1983-01-01 00:00:00
abstract::Haloperidol is extracted with hexane-isoamyl alcohol in the presence of two internal standards, chlorohaloperidol and spiroperidol. For chromatographic separation, a C18 reversed-phase column and a mobile phase of acetonitrile/methanol/phosphate buffer are used. Detection is by UV absorption spectrophotometry at 245 n...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1985-01-01 00:00:00
abstract::Since 1989 many kits have been commercialized for measuring estradiol by non-isotopic immunoassays which largely contributed to the diffusion of this parameter. Rapidly, in quality control schemes, a wide dispersion of results has been observed. In this paper, the kits' characteristics (precision, accuracy and detecti...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1995-01-01 00:00:00
abstract::It is often reminded that if the ionized calcium is not measured, the interpretation of total calcemia should consider serum albumin. Two formulas are usually employed: ["Corrected" Ca (mmol/L) = Ca measured (mmol/L) + 0.020 or 0.025 (40 - albumin (g/L))]. This adjustment formula arises from works of Payne published i...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2009.0348
更新日期:2009-07-01 00:00:00
abstract::HbA(1c) assay by high pressure liquid chromatography remains submitted to interferences, among which that of labile HbA(1c) in 1 to 2% of samples. We have evaluated the interference of labile HbA(1c) on HbA(1c) assay using Variant II analyzer (Biorad), by in vitro formation of labile glycated haemoglobin and by evalua...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2008.0251
更新日期:2008-07-01 00:00:00
abstract::We report a turbidimetric procedure, using commercially available reagents, for the determination of plasma fibronectin with an unmodified centrifugal analyser. Fixed-time kinetic readings at 340 nm were taken at 60 and 720 s. A wide range of concentration (up to 1000 mg/l) can be measured. Precision and accuracy were...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1982-01-01 00:00:00
abstract::Immunophenotyping is a major tool for the diagnosis of the chronic lymphoïd leukaemia (CLL). Its interest remains limited in the classification of the other B chronic lymphoproliférative syndromes (B-CLPS). We evaluate the place of the flow cytometry (CMF) in the diagnosis and classification of the non CLL B-CLPS. The...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2013.0915
更新日期:2013-11-01 00:00:00
abstract::Eight Capnocytophaga infections are described: bacteremia in immunodepressed patients (three cases), endocarditis (one case), pneumopathy (one case), buccal infection (two cases) and endometritis during use of an intrauterine contraceptive device (one case). The role of this bacterium in infections presented by immuno...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:1986-01-01 00:00:00
abstract::http://biotribune.com/ Biotribune.com ou la biologie medicale sur internet. Ce site est concu comme un portail sur la biologie clinique. Accueil d'internautes sur une page comportant, entre autres, les rubriques : actualite, evenements, revue des connaissances, rubrique juridique et petites annonces. Biotribune propos...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:
更新日期:2000-07-01 00:00:00
abstract::The aim of this study was to evaluate the pre-analytical factors contributing to uncertainty in thyroglobulin measurement in fluids from fine-needle aspiration (FNA) washout of cervical lymph nodes. We studied pre-analytical stability, in different conditions, of 41 samples prepared with concentrated solutions of thyr...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2017.1225
更新日期:2017-04-01 00:00:00
abstract::Today, medical prescriptions of proteinuria or albuminuria, which are depending on medical status of patients, still depend on doctors. Indeed, according to their medical specialty or to the recommendations they are following, they could prescribe either proteinuria or albuminuria. The consequences are practical for l...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2019.1412
更新日期:2019-02-01 00:00:00
abstract::Α 2 antiplasmin congenital deficiency is an uncommun fibrinolysis disorder that is diagnostics after a post-operative surgery. We report two brothers cases of α 2 antiplasmin deficiency diagnosed after a prostadenomectomy bleeding at two years intervals. ...
journal_title:Annales de biologie clinique
pub_type: 杂志文章
doi:10.1684/abc.2012.0775
更新日期:2013-01-01 00:00:00