Dynamic intron retention modulates gene expression in the monocytic differentiation pathway
Renhua Song1,2, Shweta Tikoo2,3, Rohit Jain2,3
1Epigenetics and RNA Biology Program Centenary Institute, The University of Sydney, Camperdown, New South Wales, Australia.
Immunology
|November 14, 2021
Summary
Alternative splicing, specifically intron retention, is key to monocyte differentiation. This mechanism regulates the development of monocytes from common monocyte progenitors (cMoPs) into specific subsets, a process conserved in humans.
Area of Science:
- Immunology
- Molecular Biology
- Cellular Differentiation
Background:
- Monocytes are critical for immune responses and homeostasis.
- Monocyte differentiation from common monocyte progenitors (cMoPs) is not fully understood.
- Monocytes are implicated in various pathological conditions, making them therapeutic targets.
Purpose of the Study:
- To investigate the role of alternative splicing in monocyte development and differentiation.
- To elucidate the molecular mechanisms regulating cMoP differentiation into monocytic subsets.
- To understand the contribution of intron retention to monocyte differentiation under homeostatic conditions.
Main Methods:
- Purification of murine myeloid precursors.
- Deep poly-A-enriched RNA sequencing.
- Analysis of alternative splicing events during monocyte differentiation.
Main Results:
- Intron retention identified as the predominant alternative splicing mechanism in monocyte differentiation.
- Intron retention significantly impacts the transition from Ly6C-high to Ly6C-low monocytes.
- Conserved intron retention patterns observed in human monocyte differentiation.
Conclusions:
- Intron retention plays a unique and crucial regulatory role in the monocyte differentiation pathway.
- Understanding intron retention in monocyte development offers insights into immune homeostasis and disease.
- This study provides a foundation for exploring therapeutic strategies targeting monocyte differentiation.
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