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A high throughput beta-globin genotyping method by multiplexed melting temperature analysis.

Abstract：

:For a population-based newborn screening program, challenges exist in using technological advances to improve the quality and efficiency of the existing screening program and to develop new diagnostic capabilities. A newly developed genotyping method for screening of common mutations within the beta-globin gene is described here. This genotyping system consists of three major components: an automation system for high throughput DNA extraction and PCR setup, a conventional thermal cycler, and a LightTyper instrument for post-PCR melting temperature analysis. Briefly, genomic DNA is extracted from dried blood on a filter paper using methanol and Tris buffer. Genetic fragments of interest are amplified by asymmetric PCR. Fluorescent labeled probes are added during PCR setup, which eliminates the need for any post-PCR sample handling process. Melting temperature analysis is achieved through fluorescent resonance energy transfer (FRET) reaction using the LightTyper instrument. The assay is designed to simultaneously detect three common beta-globin mutations, S(A173T), C(G172A), and E(G232A), and can identify any of the eight possible genotypes in a single reaction: AA, AE, EE, AS, SC, SS, AC, and CC (A represents wild type allele). The method was validated with a large number of samples in both a retrospective and parallel study. Results were compared to those obtained by isoelectric focusing electrophoresis. The accuracy of this genotyping method is greater than 99%.

journal_name

Mol Genet Metab

journal_title

Molecular genetics and metabolism

authors

Lin Z,Suzow JG,Fontaine JM,Naylor EW

doi

10.1016/j.ymgme.2003.12.007

subject

Has Abstract

pub_date

2004-03-01 00:00:00

pages

237-43

issue

3

eissn

1096-7192

issn

1096-7206

pii

S1096719203002865

journal_volume

81

pub_type

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