例如:"lncRNA", "apoptosis", "WRKY"

Mir-144 selectively regulates embryonic alpha-hemoglobin synthesis during primitive erythropoiesis.

Blood. 2009 Feb 05;113(6):1340-9. Epub 2008 Oct 21
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摘要


Precise transcriptional control of developmental stage-specific expression and switching of alpha- and beta-globin genes is significantly important to understand the general principles controlling gene expression and the pathogenesis of thalassemia. Although transcription factors regulating beta-globin genes have been identified, little is known about the microRNAs and trans-acting mechanism controlling alpha-globin genes transcription. Here, we show that an erythroid lineage-specific microRNA gene, miR-144, expressed at specific developmental stages during zebrafish embryogenesis, negatively regulates the embryonic alpha-globin, but not embryonic beta-globin, gene expression, through physiologically targeting klfd, an erythroid-specific Krüppel-like transcription factor. Klfd selectively binds to the CACCC boxes in the promoters of both alpha-globin and miR-144 genes to activate their transcriptions, thus forming a negative feedback circuitry to fine-tune the expression of embryonic alpha-globin gene. The selective effect of the miR-144-Klfd pathway on globin gene regulation may thereby constitute a novel therapeutic target for improving the clinical outcome of patients with thalassemia.

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