The evolution of transthyretin synthesis in the choroid plexus.

Abstract:

:Choroid plexus has the highest concentration of transthyretin (TTR) mRNA in the body, 4.4 microg TTR mRNA/g wet weight tissue, compared with 0.39 microg in the liver. The proportion of TTR to total protein synthesis in choroid plexus is 12%. All newly synthesized TTR is secreted towards the ventricles. Net transfer of T4 occurs only towards the ventricle and depends on ongoing protein synthesis. Thyroxine-binding globulin (TBG), TTR and albumin form a "buffering" system for plasma [T4] because of their overlapping affinities and on/off rates for L-thyroxine (T4)-binding. The individual components of this network determining T4 distribution are functionally highly redundant. Absence of TBG (humans), or TTR (mice), or albumin (humans, rats) is not associated with hypothyroidism. Natural selection is based on small, inheritable alterations improving function. The study of these alterations can identify function. TTR genes were cloned and sequenced for a large number of vertebrate species. Systematic, stepwise changes during evolution occurred only in the N-terminal region, which became shorter and more hydrophilic. Simultaneously, a change in function occurred: TTR affinities for T4 are higher in mammals than in reptiles and birds. L-triiodothyronine (T3) affinities show the opposite trend. This favors site-specific regulation of thyroid hormones by tissue-specific deiodinases in the brain.

journal_name

Clin Chem Lab Med

authors

Schreiber G

doi

10.1515/CCLM.2002.210

keywords:

subject

Has Abstract

pub_date

2002-12-01 00:00:00

pages

1200-10

issue

12

eissn

1434-6621

issn

1437-4331

journal_volume

40

pub_type

杂志文章,评审
  • Drug-metabolizing enzymes, polymorphisms and interindividual response to environmental toxicants.

    abstract::Individual risk of toxicity or cancer reflects the amount of exposure to environmental agents, combined with one's underlying genetic predisposition. More than six dozen human ecogenetic polymorphisms have been described; whereas some of these have been demonstrated to be associated with altered risks of toxicity or c...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2000.124

    authors: Nebert DW

    更新日期:2000-09-01 00:00:00

  • Plasma thiols and androgen levels in polycystic ovary syndrome.

    abstract::Homocysteine is a risk factor for ischemic heart disease; similarly as is hyperlipidemia or insulin resistance, which frequently occur in women with polycystic ovary syndrome. We examined the relationships between thiols and hormonal status or insulin resistance in 40 women (aged 25.8 +/- 7 years) with polycystic ovar...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2003.035

    authors: Vrbíková J,Tallová J,Biciková M,Dvoráková K,Hill M,Stárka L

    更新日期:2003-02-01 00:00:00

  • Microarray with LNA-probes for genotyping of polymorphic variants of Gilbert's syndrome gene UGT1A1(TA)n.

    abstract:BACKGROUND:Gilbert's syndrome is a common metabolic dysfunction characterized by elevated levels of unconjugated bilirubin in the bloodstream. This condition is usually caused by additional (TA) insertions in a promoter region of the uridine diphosphate glucuronosyltransferase 1A1 (UGT1A1) gene, which instead of the se...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/cclm-2012-0656

    authors: Fesenko EE,Heydarov RN,Stepanova EV,Abramov ME,Chudinov AV,Zasedatelev AS,Mikhailovich VM

    更新日期:2013-06-01 00:00:00

  • Determination of debrisoquine and 4-hydroxydebrisoquine by high-performance liquid chromatography: application to the evaluation of CYP2D6 genotype and debrisoquine metabolic ratio relationship.

    abstract::The drug-metabolizing cytochrome P450 (CYP) enzyme CYP2D6 is involved in the metabolism of several clinically important drugs. So far more than 50 different CYP2D6 allelic variants have been described, and thus there is an increased need for routine high-performance liquid chromatography (HPLC) methods for the evaluat...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2005.046

    authors: Dorado P,Berecz R,Cáceres MC,González I,Cobaleda J,Llerena A

    更新日期:2005-01-01 00:00:00

  • Performance of automated digital cell imaging analyzer Sysmex DI-60.

    abstract:BACKGROUND:The Sysmex DI-60 system (DI-60, Sysmex, Kobe, Japan) is a new automated digital cell imaging analyzer. We explored the performance of DI-60 in comparison with Sysmex XN analyzer (XN, Sysmex) and manual count. METHODS:In a total of 276 samples (176 abnormal and 100 normal samples), white blood cell (WBC) dif...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/cclm-2017-0132

    authors: Kim HN,Hur M,Kim H,Kim SW,Moon HW,Yun YM

    更新日期:2017-11-27 00:00:00

  • Prostate-specific antigen and new related markers for prostate cancer.

    abstract::Although prostate-specific antigen (PSA), or human kallikrein 3, is the most valuable tool available for the diagnosis and management of prostate cancer, as currently used it is insufficiently sensitive and specific for early detection or staging of the malignancy. Many new concepts have been introduced in order to op...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.1998.120

    authors: Daher R,Beaini M

    更新日期:1998-09-01 00:00:00

  • Comparability of five analytical systems for the determination of triiodothyronine, thyroxine and thyroid-stimulating hormone.

    abstract:BACKGROUND:The purpose of an external quality assessment (EQA) is to evaluate the analytical capability of clinical laboratories, identify differences among the laboratories and improve analytical quality. Our EQA results show that the rates of unsatisfactory performance for thyroid hormone tests were the highest in al...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2006.251

    authors: Zhou Q,Li S,Li X,Wang W,Wang Z

    更新日期:2006-01-01 00:00:00

  • Optimizing the purification and analysis of miRNAs from urinary exosomes.

    abstract:BACKGROUND:Exosomes are cytoplasm containing vesicles released by many cells that can be found in several biological fluids including urine. Urinary exosomes are released from every segment of the nephron, are detectable in urine, constitutively contain RNA (small RNAs and mRNAs) and harbor unique subset of proteins, r...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/cclm-2013-0562

    authors: Channavajjhala SK,Rossato M,Morandini F,Castagna A,Pizzolo F,Bazzoni F,Olivieri O

    更新日期:2014-03-01 00:00:00

  • Isoenzymes of N-acetyl-beta-hexosaminidase in human pleomorphic adenoma and healthy salivary glands: a preliminary study.

    abstract:BACKGROUND:Pleomorphic adenoma (PA) is a benign tumour of the salivary gland with a tendency to malignancy which creates many diagnostic problems. N-acetyl-beta-hexosaminidase (HEX) is a lysosomal exoglycosidase involved in degradation of oligosaccharide chains of glycoproteins, glycolipids and glycosaminoglycans, know...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2008.018

    authors: Borzym-Kluczyk M,Olszewska E,Radziejewska I,Lewszuk A,Zwierz K

    更新日期:2008-01-01 00:00:00

  • Matrix effects in clinical immunoassays and the effect of preheating and cooling analytical samples.

    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

    authors: Yoshida H,Imafuku Y,Nagai T

    更新日期:2004-01-01 00:00:00

  • Cytokines as plasma markers of abdominal aortic aneurysm.

    abstract:UNLABELLED:The pathogenesis of abdominal aortic aneurysms (AAA) is a complex process in which atherosclerosis and inflammation play a leading role. Cytokines are important mediators of both processes. The aim of our study was to determine whether plasma levels of cytokines which are most involved in AAA pathogenesis ca...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2000.178

    authors: Treska V,Topolcan O,Pecen L

    更新日期:2000-11-01 00:00:00

  • Serum albumin fragmentation in end-stage renal disease patients--a pilot study.

    abstract:BACKGROUND:The goal of this study was to detect modification in the expression of plasma proteins and/or post-translational modifications of their structure in patients with end stage renal disease. METHODS:Serum samples from 19 adult patients treated by maintenance hemodialysis (MHD) were analyzed in comparison to se...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2009.303

    authors: Donadio E,Piccolomini F,Dimuccio V,Felicioli A,Balestreri E,Cianti R,Armini A,Bini L,Felicioli R,Donadio C

    更新日期:2009-01-01 00:00:00

  • Inflammatory bowel diseases: from pathogenesis to laboratory testing.

    abstract::Inflammatory bowel diseases (IBDs), which comprise the two major clinical subtypes, Crohn's disease and ulcerative colitis, incur high morbidity and potential mortality. The present study reviews data on the pathogenesis and diagnosis of IBDs. The pathogenesis depends on complex interactions between susceptibility gen...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/cclm-2013-0588

    authors: Basso D,Zambon CF,Plebani M

    更新日期:2014-04-01 00:00:00

  • A patient with AL amyloidosis with negative free light chain results.

    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

    authors: Milani P,Valentini V,Ferraro G,Basset M,Russo F,Foli A,Palladini G,Merlini G

    更新日期:2016-06-01 00:00:00

  • Diabesity: an inflammatory metabolic condition.

    abstract::Diabesity, that is to say, obesity-dependent diabetes, has emerged as a major public health problem. Though diabesity is basically explained by insulin resistance and pancreatic beta cell dysfunction, new paradigms have evolved to explain these alterations in the context of the modern epidemics of obesity and diabetes...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2003.174

    authors: Schmidt MI,Duncan BB

    更新日期:2003-09-01 00:00:00

  • Can age and sex related reference intervals be derived for non-healthy and non-diseased individuals from results of measurements in primary health care?

    abstract::Reference intervals in clinical chemistry are commonly based on results of measurements in reference populations or are taken from the literature. A reference population should represent a defined group of individuals and be as similar as possible to the patients under investigation. Frequently, reference populations ...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2000.093

    authors: Kallner A,Gustavsson E,Hendig E

    更新日期:2000-07-01 00:00:00

  • May thrombopoietin be a useful marker of sepsis severity assessment in patients with SIRS entering the emergency department?

    abstract:BACKGROUND:Thrombopoietin (TPO), a growth factor primarily involved in regulating thrombopoiesis, has been recently implicated in the pathogenesis of sepsis. TPO levels are, indeed, greatly increased in patients with sepsis compared to control subjects, and correlate with sepsis severity. The aim of this study was to e...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,多中心研究

    doi:10.1515/cclm-2014-0219

    authors: Segre E,Pigozzi L,Lison D,Pivetta E,Bosco O,Vizio B,Suppo U,Turvani F,Morello F,Battista S,Moiraghi C,Montrucchio G,Lupia E

    更新日期:2014-10-01 00:00:00

  • Biomarkers in Alzheimer's disease.

    abstract::Dementia is a growing public health concern because of the lack of effective curative treatment options and a rising global prevalence. Alzheimer's disease (AD) is the most common type of dementia, affecting 60%-70% of all patients with dementia. The main pathological features of Alzheimer's dementia are neurofibrilla...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2011.139

    authors: Demarin V,Zavoreo I,Kes VB,Simundić AM

    更新日期:2011-05-01 00:00:00

  • Trace elements and bone health.

    abstract::The importance of nutrition factors such as calcium, vitamin D and vitamin K for the integrity of the skeleton is well known. Moreover, bone health is positively influenced by certain elements (e.g., zinc, copper, fluorine, manganese, magnesium, iron and boron). Deficiency of these elements slows down the increase of ...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/cclm-2012-0868

    authors: Zofková I,Nemcikova P,Matucha P

    更新日期:2013-08-01 00:00:00

  • Impact of interactions between drugs and laboratory test results on diagnostic test interpretation - a systematic review.

    abstract::Intake of drugs may influence the interpretation of laboratory test results. Knowledge and correct interpretation of possible drug-laboratory test interactions (DLTIs) is important for physicians, pharmacists and laboratory specialists. Laboratory results may be affected by analytical or physiological effects of medic...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/cclm-2018-0900

    authors: van Balveren JA,Verboeket-van de Venne WPHG,Erdem-Eraslan L,de Graaf AJ,Loot AE,Musson REA,Oosterhuis WP,Schuijt MP,van der Sijs H,Verheul RJ,de Wolf HK,Kusters R,Hoedemakers RMJ,Dutch Society for Clinical Chemistry and Laborat

    更新日期:2018-11-27 00:00:00

  • Point-of-care testing, medical error, and patient safety: a 2007 assessment.

    abstract::Point-of-care testing (POCT) is the fastest growing segment of a US$30 billion worldwide market. "Errors" in the testing process, as well as medical data interpretation and treatment associated with POCT, are recognized as leading to major compromises of patient safety. In today's environment, most testing errors (pre...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2007.164

    authors: Ehrmeyer SS,Laessig RH

    更新日期:2007-01-01 00:00:00

  • The use of free cortisol index for laboratory assessment of pituitary-adrenal function.

    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 an...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.1999.023

    authors: Bonte HA,van den Hoven RJ,van der Sluijs Veer G,Vermes I

    更新日期:1999-02-01 00:00:00

  • Determination of asymmetric dimethyl arginine in human serum by liquid chromatography-tandem mass spectrometry: clinical application in hypertensive subjects.

    abstract:BACKGROUND:Asymmetric dimethylarginine (ADMA), an endogenous competitive inhibitor of nitric oxide synthase plays an important role in endothelial dysfunction processes. Recent studies have linked high ADMA levels with several pathological conditions. The interest as a marker of endothelial dysfunction has increased in...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2011.691

    authors: Gervasoni J,Bonelli F,Zuppi C,Zappacosta B,Mordente A,Calvani R,Persichilli S

    更新日期:2011-09-06 00:00:00

  • Standardization of gamma-glutamyltransferase assays by intermethod calibration. Effect on determining common reference limits.

    abstract:BACKGROUND:The improvement of the consistency of gamma-glutamyltransferase (GGT) activity results among different assays after calibration with a common material was estimated. We evaluated if this harmonization could lead to reference limits common to different routine methods. METHODS:Seven laboratories measured GGT...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2007.290

    authors: Steinmetz J,Schiele F,Gueguen R,Férard G,Henny J,Periodic Health Examination Centers Laboratory Working Group.

    更新日期:2007-01-01 00:00:00

  • Development of a new biochip array for APOE4 classification from plasma samples using immunoassay-based methods.

    abstract:BACKGROUND:Apolipoprotein E (APOE) is a key player in lipid transport and metabolism and exists in three common isoforms: APOE2, APOE3 and APOE4. The presence of the E4 allelic variant is recognized as a major genetic risk factor for dementia and other chronic (neuro)degenerative diseases. The availability of a validat...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/cclm-2017-0618

    authors: Badrnya S,Doherty T,Richardson C,McConnell RI,Lamont JV,Veitinger M,FitzGerald SP,Zellner M,Umlauf E

    更新日期:2018-04-25 00:00:00

  • Difficulties in establishing reference intervals for special fluids: the example of 5-hydroxyindoleacetic acid and homovanillic acid in cerebrospinal fluid.

    abstract::Biochemical measurements in "special fluids" are complicated with the problem of reference intervals. Reference intervals are difficult to establish for these types of samples since they are usually only collected in patients with clinical suspicion of disease. Determination of neurotransmitter metabolites in cerebros...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2004.137

    authors: Dhondt JL

    更新日期:2004-01-01 00:00:00

  • Determination of serum creatinine by Jaffe method and how to calibrate to eliminate matrix interference problems.

    abstract:BACKGROUND:The calibration of Jaffe method for serum creatinine using one serum-based standard complemented with artificial matrix compensating standard's Jaffe-interfering substances allows two-point calibration with results well comparable with enzymatic methods. METHOD:Spectrophotometry was used. RESULTS:Jaffe pro...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2008.224

    authors: Chromý V,Rozkosná K,Sedlák P

    更新日期:2008-01-01 00:00:00

  • Automated prozone effect detection in ferritin homogeneous immunoassays using neural network classifiers.

    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

    authors: Papik K,Molnar B,Fedorcsak P,Schaefer R,Lang F,Sreter L,Feher J,Tulassay Z

    更新日期:1999-04-01 00:00:00

  • Historical overview of analytical methods for the measurement of transthyretin.

    abstract::The history of prealbumin dates back to the early forties and may be divided into three parts, based on a chronological and functional approach. The first part--the discovery and the identification of prealbumin--was essentially based on classical protein chemistry methods. The second--the demonstration of prealbumin ...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章,评审

    doi:10.1515/CCLM.2002.220

    authors: De Nayer P

    更新日期:2002-12-01 00:00:00

  • An International Standard for whole blood folate: evaluation of a lyophilised haemolysate in an international collaborative study.

    abstract::Folate measurements, particularly for whole blood, show wide inter-laboratory and inter-methodology variability. This variability appears to be due in part to the lack of internationally accepted reference materials. A whole blood haemolysate, lyophilised in ampoules and designated 95/528, was therefore evaluated by 1...

    journal_title:Clinical chemistry and laboratory medicine

    pub_type: 杂志文章

    doi:10.1515/CCLM.2004.090

    authors: Thorpe SJ,Sands D,Heath AB,Hamilton MS,Blackmore S,Barrowcliffe T

    更新日期:2004-05-01 00:00:00