Relationships between DNA methylation and expression in erythrocyte membrane protein (band 3, protein 4.2, and beta-spectrin) genes during human erythroid development and differentiation

International Journal of Hematology
Ralph RemusY Yawata

Abstract

Red cell membrane proteins are sequentially expressed during erythroid development and differentiation. Spectrins have already been synthesized in early erythroid precursors such as pronormoblasts, and band 3 (B3) appears at nearly the same stage. Protein 4.1 appears next, followed by protein 4.2 (P4.2) at the very late erythroblast stage. The methylation states of the promoter 5'-CG-3' sites are known to be linked to the regulation of promoter function by modulating DNA-protein interactions and the structure of chromatin. Hence, the genes for B3, P4.2, and beta-spectrin (beta-SP) appear to be suitable models to study the relationship between methylation of promoter 5'-CG-3' sites and the sequential expression of genes during human erythroid development and differentiation. We have examined methylation profiles in the promoter regions of the genes (ELB42, EPB3, and SPTB) for the human erythroid membrane proteins P4.2, B3, and beta-SP by applying the bisulfite genomic sequencing method. Our results demon strate the following: (1) The promoter regions of EPB3 and ELB42 are extensively methylated in DNA from human peripheral blood mononuclear cells, but the SPTB promoter is totally unmethylated. (2) During erythroid differentiatio...Continue Reading

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Citations

Nov 25, 1998·British Journal of Haematology·T A McAdamsE T Papoutsakis

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