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Hemoglobin
international journal for hemoglobin research
Volume 21, 1997 - Issue 1
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Original Article

Multivariant Confirmation of Sickle Cell Disease Using a Non-Radioactive Minisequencing Reaction

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Pages 71-89 | Received 06 Feb 1996, Accepted 29 Jul 1996, Published online: 07 Jul 2009
 

Abstract

A non-radioactive solid-phase minisequencing method for confirmation of abnormal hemoglobin variants causing sickle cell disease has been developed. In this method amplified 5′-biotinylated target sequences containing normal and mutation sites are immobilized onto streptavidin-coated microplates. Detection primers corresponding to target sequences are annealed immediately adjacent to the mutation site and single-step, hapten-labeled nucleotide primer extension reactions are performed. The incorporation of the labeled nucleotide is detected through immunological reaction with an enzyme-labeled anti-hapten conjugate and a substrate. The method enables confirmation of mutations of the β-globin gene variants (Hbs S, C, E, D-Punjab, O-Arab) and the α-globin gene variant (Hb G-Philadelphia). The test was evaluated using characterized dried blood spot specimens (n = 100). The advantages of the procedure are easy performance and objectiveness. The non-radioactive minisequencing assay will prove helpful for genotyping in neonatal screening for hemoglobinopathies and in prenatal and pre-implantational diagnostics.

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