WDR82-binding long noncoding RNA lncEry controls mouse erythroid differentiation and maturation.

Area of Science:

• * Molecular Biology
• * Genetics
• * Hematology

Background:

• * Hematopoietic differentiation is a complex process regulated by genetic and epigenetic factors.
• * Long noncoding RNAs (lncRNAs) play roles in hematopoiesis, but their specific functions in erythropoiesis require further investigation.
• * Understanding lncRNA roles is essential for comprehending red blood cell development.

Purpose of the Study:

• * To identify and characterize novel lncRNAs involved in erythropoiesis.
• * To elucidate the functional role and mechanism of a newly identified lncRNA, named lncEry, in red blood cell differentiation.
• * To explore the regulatory network of lncEry in erythropoiesis.

Main Methods:

• * Deep RNA sequencing of 16 murine hematopoietic cell populations.
• * Identification and characterization of a novel lncRNA, Gm15915 (lncEry), and its isoforms.
• * Functional studies involving lncEry depletion in erythropoiesis.
• * Mechanistic studies to determine lncEry's interaction partners and target genes.

Main Results:

• * A novel lncRNA, lncEry, was identified and found to be highly expressed in erythroid progenitors and erythrocytes.
• * A previously unreported isoform of lncEry was identified as the principal transcript.
• * Depletion of lncEry significantly impaired erythropoiesis, affecting differentiation and maturation.
• * lncEry was shown to interact with WD repeat-containing protein 82 (WDR82).
• * This interaction promotes the transcription of Klf1 and globin genes, crucial for erythropoiesis.

Conclusions:

• * lncEry is a critical regulator of erythropoiesis, impacting both early and late stages.
• * lncEry functions by interacting with WDR82 to modulate the transcription of key erythroid genes.
• * These findings highlight lncEry as a significant factor in the transcriptional control of red blood cell development.