Abstract:
BACKGROUND:Screening for heterozygous sequence changes in PCR products, also known as "mutation scanning", is an important tool for genetic research and clinical applications. Conventional methods require a separation step. METHODS:We evaluated the sensitivity and specificity of homogeneous scanning, using a saturating DNA dye and high-resolution melting. Heterozygous single-nucleotide polymorphism (SNP) detection was studied in three different sequence backgrounds of 40%, 50%, and 60% GC content. PCR products of 50-1000 bp were generated in the presence of LCGreen I. After fluorescence normalization and temperature overlay, melting curve shape was used to judge the presence or absence of heterozygotes among 1632 cases. RESULTS:For PCR products of 300 bp or less, all 280 heterozygous and 296 wild-type cases were correctly called without error. In 672 cases between 400 and 1000 bp with the mutation centered, the sensitivity and specificity were 96.1% and 99.4%, respectively. When the sequence background and product size with the greatest error rate were used, the sensitivity of off-center SNPs (384 cases) was 95.6% with a specificity of 99.4%. Most false negatives occurred with SNPs that were compared with an A or T wild type sequence. CONCLUSIONS:High-resolution melting analysis with the dye LCGreen I identifies heterozygous single-base changes in PCR products with a sensitivity and specificity comparable or superior to nonhomogeneous techniques. The error rate of scanning depends on the PCR product size and the type of base change, but not on the position of the SNP. The technique requires only PCR reagents, the dye LCGreen I, and 1-2 min of closed-tube, post-PCR analysis.
journal_name
Clin Chemjournal_title
Clinical chemistryauthors
Reed GH,Wittwer CTdoi
10.1373/clinchem.2003.029751subject
Has Abstractpub_date
2004-10-01 00:00:00pages
1748-54issue
10eissn
0009-9147issn
1530-8561pii
clinchem.2003.029751journal_volume
50pub_type
杂志文章abstract::A method for determining platinum in biological materials by flameless atomic absorption spectrometry has been developed for use in pharmacological studies of platinum antitumor compounds. Tissue digests are analyzed in a heated graphite atomizer, with use of background correction and ramp temperature charring. We hav...
journal_title:Clinical chemistry
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doi:
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abstract::The kidney and its response to the antidiuretic hormone (ADH) are the principal protective mechanisms necessary to maintain a normal plasma tonicity (osmolality). Hence, determination of the response of the ADH-renal axis to an abnormal plasma tonicity is an important step to understanding water homeostasis. Determina...
journal_title:Clinical chemistry
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journal_title:Clinical chemistry
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doi:
更新日期:1987-05-01 00:00:00
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journal_title:Clinical chemistry
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doi:
更新日期:1983-10-01 00:00:00
abstract::The deleterious, disruptive effects of estrogen mimics on the endocrine system were discovered after the compounds were released into the environment. Their chemical structure does not obviously resemble that of steroid hormones; hence, their estrogenic effects were totally unexpected. In addition to occupational expo...
journal_title:Clinical chemistry
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doi:
更新日期:1995-12-01 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
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doi:
更新日期:1984-11-01 00:00:00
abstract:BACKGROUND:It has been shown that a high percentage of interleukin-8 (IL-8) in blood is cell associated. Recently, a simple method for determination of cell-associated IL-8 in whole blood after cell lysis has been described. The purpose of this study was to evaluate this method, to examine the influence of preanalytic ...
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更新日期:2000-09-01 00:00:00
abstract::A modified gas-liquid chromatographic method for determining plasma concentrations of bupivacaine and lidocaine is described, with cyclizine as an internal standard. The extraction procedure requires no solvent evaporation, thus overcoming the problem of drug volatility. Concentrations as low as 0.1 mg/liter can be de...
journal_title:Clinical chemistry
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更新日期:1978-09-01 00:00:00
abstract::Estimation of plasma catecholamine concentrations by "high-performance" liquid chromatography, although increasingly used, still presents difficulties. We describe a method for clean-up of plasma samples on cation-exchange resin before they are extracted with alumina. This procedure eliminates many of the interfering ...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1983-07-01 00:00:00
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journal_title:Clinical chemistry
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doi:
更新日期:1979-11-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1979-03-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1983-12-01 00:00:00
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更新日期:2009-03-01 00:00:00
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更新日期:2011-01-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1987-04-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1985-03-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1999-05-01 00:00:00
abstract::Serial measurements of the bone and fetal intestinal isoenzymes of alkaline phosphatase (EC 3.1.3.1) in the plasma of 43 term and 43 preterm infants, from birth to six weeks later, indicate that the bone isoenzyme gradually increases over this period in both preterm and term infants fed with unsupplemented commercial ...
journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1987-10-01 00:00:00
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journal_title:Clinical chemistry
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doi:
更新日期:1988-12-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:1979-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1373/clinchem.2008.109173
更新日期:2008-12-01 00:00:00
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doi:10.1373/clinchem.2006.066720
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journal_title:Clinical chemistry
pub_type: 杂志文章
doi:
更新日期:2001-11-01 00:00:00
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journal_title:Clinical chemistry
pub_type: 杂志文章,评审
doi:
更新日期:1999-12-01 00:00:00
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doi:10.1373/clinchem.2009.135962
更新日期:2010-05-01 00:00:00
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journal_title:Clinical chemistry
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doi:
更新日期:1978-10-01 00:00:00