Expression patterns of microRNAs 155 and 451 during normal human erythropoiesis

To clarify the roles of microRNAs (miRNAs) in erythropoiesis, the expression of miR-155, miR-221, miR-223, and miR-451 were analyzed during the differentiation of purified normal human erythroid progenitors in a liquid culture system. Cells increased almost 500-fold in a number, and differentiated t...

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Published in:Biochemical and biophysical research communications 2007-12, Vol.364 (3), p.509-514
Main Authors: Masaki, Shizuka, Ohtsuka, Rie, Abe, Yasunobu, Muta, Koichiro, Umemura, Tsukuru
Format: Article
Language:English
Subjects:
Blood cell
Cell Differentiation
Cells, Cultured
Differentiation
Erythrocytes - cytology
Erythrocytes - physiology
Erythropoiesis
Erythropoiesis - genetics
Gene Expression Regulation - genetics
Human
Humans
Leukocytes, Mononuclear - cytology
Leukocytes, Mononuclear - physiology
Liquid culture system
MicroRNA
MicroRNAs - genetics
MiRNA-155
MiRNA-451
Progenitor
Quantitative real-time polymerase chain reaction
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Summary:To clarify the roles of microRNAs (miRNAs) in erythropoiesis, the expression of miR-155, miR-221, miR-223, and miR-451 were analyzed during the differentiation of purified normal human erythroid progenitors in a liquid culture system. Cells increased almost 500-fold in a number, and differentiated to benzidine-positive mature erythroblasts. Analyses of miRNA expression using the quantitative real-time polymerase chain reaction showed that the expression level of miR-155 decreased about 200-fold, and that the expression of miR-451 increased about 270-fold during 12 days of cultures. A moderate down-regulation of miR-221 and miR-223 was observed. MiR-451 was expressed in red blood cells about 104-fold more than in granulocytes, obtained from normal human peripheral blood. These observations suggest that miR-155 and miR-451 are key molecules for normal erythroid differentiation, and that quantitative assays of the two miRNAs may be a relevant method for analyzing pathological erythropoiesis.
ISSN:0006-291X
1090-2104
DOI:10.1016/j.bbrc.2007.10.077