Abstract:
BACKGROUND:Small RNAs are key players in the regulation of gene expression and differentiation. However, many different classes of small RNAs (sRNAs) have been described with distinct biogenesis pathways and, as a result, with different biochemical properties. To analyze sRNAs by deep sequencing, complementary DNA synthesis requires manipulation of the RNA molecule itself. Thus, enzymatic activities during library preparation bias the library content owing to biochemical criteria. METHODS:We compared 4 different manipulations of RNA for library preparation: (a) a ligation-based procedure allowing only 5'-mono-phosphorylated RNA to enter the library, (b) a ligation-based procedure allowing additional 5'-triphosphates and Cap structures, (c) a ligation-independent, template-switch-based library preparation, and (d) a template-switch-based library preparation allowing 3'-phosphorylated RNAs to enter the library. RESULTS:Our data show large differences between ligation-dependent and ligation-independent libraries in terms of their preference for individual sRNA classes such as microRNAs (miRNAs), Piwi-interacting RNAs (piRNAs), and transfer RNA fragments. Moreover, the miRNA composition is different between both procedures, and more microRNA isoforms (isomiRs) can be identified after pyrophosphatase treatment. piRNAs are enriched in template-switch libraries, and this procedure apparently includes more different RNA species. CONCLUSIONS:Our data indicate that miRNAomics from both methods will hardly be comparable. Ligation-based libraries enrich for canonical miRNAs, which thus may be suitable methods for miRNAomics. Template-switch libraries contain increased numbers and different compositions of fragments and long RNAs. Following different interests for other small RNA species, ligation-independent libraries appear to show a more realistic sRNA landscape with lower bias against biochemical modifications.
journal_name
Clin Chemjournal_title
Clinical chemistryauthors
Meistertzheim M,Fehlmann T,Drews F,Pirritano M,Gasparoni G,Keller A,Simon Mdoi
10.1373/clinchem.2019.305045subject
Has Abstractpub_date
2019-12-01 00:00:00pages
1581-1591issue
12eissn
0009-9147issn
1530-8561pii
clinchem.2019.305045journal_volume
65pub_type
杂志文章abstract::To correct the results of a radioimmunoassay for beta-thyrotropin (TSH) subunit by eliminating the proportion ascribable to intact TSH, we have devised a method that experimentally reproduces the conditions under which the interference develops. Beta-TSH subunit was assayed in several preparations containing known con...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1987-05-01 00:00:00
abstract::We divided patients with brain lesions into three groups: (a) patients with primary or metastatic brain cancer, (b) brain infarctions, and (c) brain contusion(s). We analyzed each patient's sera for creatine kinase isoenzyme BB (CK-BB), using a monoclonal antibody kit (Impres-BB; International Immunoassay Laboratories...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1989-04-01 00:00:00
abstract:BACKGROUND:The American Diabetes Association task force on standardization of insulin assays in 1996 showed wide variation in assay bias. Newer assays are specific for insulin, with several now available on automated immunoassay analyzers. METHODS:In 2004, we compared 11 commercially available insulin assays by analyz...
journal_title:Clinical chemistry
pub_type: 杂志文章,多中心研究
doi:10.1373/clinchem.2006.077784
更新日期:2007-05-01 00:00:00
abstract::This HPLC/immunoassay procedure measures digoxin in serum with no interference from digoxin metabolites or digoxin-like factors. We used solid-phase (C18 and Diol) extraction, a C18 column with a tetrahydrofuran/water mobile phase, and final quantification by fluorescence polarization immunoassay. Deslanoside and gito...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1988-12-01 00:00:00
abstract:BACKGROUND:The recent interest of clinical laboratories in developing serum testosterone assays based on isotope dilution-liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS) stems from the lack of accuracy of direct immunoassays. In this study, we assessed the accuracy and state of standardization (traceabilit...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2008.105841
更新日期:2008-08-01 00:00:00
abstract:BACKGROUND:Microalbuminuria (MA) is recognized as an important risk factor for cardiovascular and renal complications in diabetes. We sought to evaluate how screening for MA is conducted and how urine albumin (UA) results are interpreted in primary care internationally. METHODS:General practitioners (GPs) received a c...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2007.100917
更新日期:2008-10-01 00:00:00
abstract::A colorimetric method for measuring anti-NAD+ glycohydrolase in human sera has been developed. The assay involves the inhibition of NAD+ glycohydrolase (EC 3.2.2.5) by the antibody and determination of the noninhibited enzyme activity by using an enzymatic amplifying system for NAD+. The assay is easily carried out an...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1993-06-01 00:00:00
abstract::Polyol concentrations were determined by selected-ion monitoring in 10 sample sets taken before dialysis and hourly for 4 h during dialysis. Predialysis concentrations (mumol/L) exceeding the upper limit of normal (mean + 2 SD; n = 33) were found for erythritol (25.4-59.0), threitol (11.5-46.7), and arabinitol (21.0-4...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1990-12-01 00:00:00
abstract:BACKGROUND:Total prostate-specific antigen (tPSA) is flawed for prostate cancer (PCa) detection. [-2]proprostate-specific antigen (p2PSA), a molecular isoform of free PSA (fPSA), shows higher specificity compared with tPSA or percentage of free PSA (%fPSA). The prostate health index (Phi), a measure based on p2PSA and ...
journal_title:Clinical chemistry
pub_type: 杂志文章,多中心研究
doi:10.1373/clinchem.2012.195784
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:Prostate-specific antigen (PSA) is a valuable prostatic cancer biomarker that is now widely used for population screening, diagnosis, and monitoring of patients with prostate cancer. Despite the voluminous literature on this biomarker, relatively few reports have addressed the issue of its physiological func...
journal_title:Clinical chemistry
pub_type: 杂志文章,评审
doi:
更新日期:2000-07-01 00:00:00
abstract::We describe a modified tantalum ribbon atomic absorption procedure for determining lead in undiluted whole blood. An instrumentation Laboratory (I.L.) Model 151 atomic absorption spectrophotometer equipped with an I.L. Model 355 Flameless Sampler was used. The Flameless Sampler was slightly modified to include three-c...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1978-07-01 00:00:00
abstract::A radioimmunoassay for 1,25-dihydroxycholecalciferol which did not cross react with 1,25-dihydroxyergocalciferol is described. IgG fractions were prepared from the serum of rabbits that had been immunized with 1,25-dihydroxycholecalciferol-3-hemisuccinate coupled to bovine albumin. Radioligand binding by the IgG fract...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1981-03-01 00:00:00
abstract::We have evaluated a new immunoenzymatic assay for human thyrotropin involving three monoclonal antibodies (Abbott HTSH EIA) and compared the results with those of two conventional nonequilibrium double-antibody radioimmunoassay (RIA) methods: Clinical Assays' RIA and a research RIA (J Clin Endocrinol Metab 1975; 41:67...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1986-03-01 00:00:00
abstract::We evaluated "borderline" increases in overnight albumin excretion rates (AERs)----i.e., those between the upper 95th percentile of normal (7.6 micrograms/min) and the lowest value currently considered predictive of nephropathy (30 micrograms/min)----to determine their importance and to see whether glucose control inf...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1991-12-01 00:00:00
abstract::In the diagnosis of chronic (as opposed to acute) liver diseases, combinations of indicators are needed to improve specificity. Alanine aminopeptidase (AAP; microsomal aminopeptidase, EC 3.4.11.2) activity in serum reportedly is a very sensitive indicator of intrahepatic cholestasis and biliary obstruction; it is also...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1987-03-01 00:00:00
abstract:BACKGROUND:Lipoprotein lipase (LPL) is the rate-limiting enzyme in the hydrolysis of core triglycerides in chylomicrons and VLDL. METHODS:We investigated the association between the HindIII polymorphism of the LPL gene and fasting glucose, lipid, and lipoprotein concentrations in 683 Caucasians. We first stabilized th...
journal_title:Clinical chemistry
pub_type: 临床试验,杂志文章
doi:
更新日期:1999-07-01 00:00:00
abstract:BACKGROUND:Diabetes mellitus has been historically divided into type 1 and type 2 diabetes, with type 1 being an autoimmune disease and type 2 being primarily a metabolic disease. CONTENT:The current diabetes classification scheme needs to be reevaluated because of the accumulating evidence of immune system involvemen...
journal_title:Clinical chemistry
pub_type: 杂志文章,评审
doi:10.1373/clinchem.2010.148270
更新日期:2011-02-01 00:00:00
abstract:BACKGROUND:PCR-based detection of minimal residual disease (MRD) in neuroblastoma (NB) patients can be used for initial staging and monitoring therapy response in bone marrow (BM) and peripheral blood (PB). PHOX2B has been identified as a sensitive and specific MRD marker; however, its expression varies between tumors....
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2008.117945
更新日期:2009-07-01 00:00:00
abstract:BACKGROUND:Dried blood spots (DBS) are a convenient and inexpensive method for biobanking. Although many countries have established population-based DBS biobanks from neonatal screening programs, the quality and usefulness of DNA from DBS have not been extensively assessed. METHODS:We compared 4 common DNA extraction ...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2007.087510
更新日期:2007-08-01 00:00:00
abstract::In this efficient extraction and isocratic liquid-chromatographic procedure for measuring eight antidepressant drugs in serum (amoxapine, 8-hydroxyamoxapine, doxepin, desmethyldoxepin, imipramine, desipramine, amitriptyline, and nortriptyline), they are extracted from serum as a group by use of disposable solid-phase ...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract:BACKGROUND:Group B streptococcal infections are the leading cause of sepsis and meningitis in newborns. A rapid and reliable method for the detection of this pathogen at the time of delivery is needed for the early treatment of neonates. Isothermal amplification techniques such as recombinase polymerase amplification h...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2013.213504
更新日期:2014-04-01 00:00:00
abstract::Quantification of ethanol by a radiative energy attenuation (REA) technique was evaluated and compared with results by gas-liquid chromatography (GLC) and by the Du Pont aca. Within-assay CVs were less than 5.5%. Between-assay CVs ranged from 1.9% to 6.0% for serum and blood controls at concentrations of 0.5, 1.0, and...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract::We describe a discrete automated radioimmunoassay system for determining choriomammotropin (placental lactogen) in human serum. With the present system it can be measured in as many as 37 unknown sera (50 muL) and three quality-control sera, in duplicate, within 1.5 h. The time required for sample preparation, incubat...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1979-01-01 00:00:00
abstract::We compared serum lipoprotein cholesterol concentrations in a randomly selected subsample (n = 406) population of children (ages 5 to 17 years), as measured by the heparin-Ca2+ and the heparin-Mn2+ precipitation methods. Statistical analysis showed significant differences between results by these methods, especially i...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1980-10-01 00:00:00
abstract:BACKGROUND:Testing for troponin has important clinical value for patients who present with typical symptoms of acute coronary syndromes (ACS) such as chest pain (CP). Much less is known about the value of troponin testing for patients who present with other symptoms of ACS (anginal equivalent symptoms). METHODS:The ut...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:10.1373/clinchem.2003.016311
更新日期:2004-01-01 00:00:00
abstract::In this fluorometric assay for phospholipase A2 (EC 3.1.1.4) in serum we use the fluorescent phospholipid analog 1-octacosanyl-2-(pyren-1-yl)hexanoyl-sn-glycero-3-phosphatid yl monomethyl ester as substrate. The optimized conditions are: 28 mumol of the substrate per liter of Tris buffer (20 mmol/L, pH 7.4). The hydro...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1985-05-01 00:00:00
abstract::We compared results obtained with the Beckman Creatinine Analyzer (Beckman Instruments, Inc.) to those with the GEMSAEC Centrifugal Analyzer (Electro-Nucleonics, Inc.) and with a manual method for determination of creatinine in serum and urine. Linearity, stability, recovery, and precision were evaluated. Interference...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1979-06-01 00:00:00
abstract::The purpose of Medicare's Demonstration of Competitive Bidding for Clinical Laboratory Services is to determine whether competitive bidding can be used to provide quality laboratory services at prices below current Medicare reimbursement rates. Here, we present key features of the preliminary design for the demonstrat...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1998-08-01 00:00:00
abstract::I describe a gas-chromatographic procedure involving a nitrogen detector for "free" (or "unbound") phenytoin in the concentration range 0.2-4.0 mg/L in ultrafiltrates of plasma. The CV (n = 10) for the assay was 2.9% for a 0.49 mg/L concentration, 1.5% for 2.02 mg/L. The sensitivity was 0.05 mg/L. The ultrafiltration ...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1981-03-01 00:00:00
abstract::We have studied factors affecting biological variation in total plasma alkaline phosphatase in a population of 32 329 apparently healthy subjects four years old or older. Quantification of the bone and liver isoenzymes after thermal denaturation made it possible to specify the contributions of each isoenzyme to variat...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1983-04-01 00:00:00