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Updated: May 7, 2026
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Transcriptome-Wide Profiling of Protein-RNA Interactions by Cross-Linking and Immunoprecipitation Mediated by FLAG-Biotin Tandem Purification
Published on: May 18, 2020
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The RNA binding protein LIN28A mediates chromatin dynamics during neuronal differentiation
Silvia Piscitelli1, Emanuela Cascone1, Chiara D'Ambrosio2
1Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, Naples, Italy.
Cell Death and Differentiation
|May 5, 2026
Summary
The RNA-binding protein LIN28A is crucial for neuronal differentiation by regulating Polycomb Repressive Complex 2 (PRC2) chromatin dynamics. Loss of LIN28A impairs neural precursor development, highlighting its epigenetic role.
Area of Science:
- Epigenetics
- Developmental Biology
- RNA Biology
Background:
- Embryonic stem cell (ESC) differentiation involves complex transcriptional and epigenetic regulation.
- The RNA-binding protein LIN28A plays a role in development, but its precise function in ESC differentiation is unclear.
- Interplay between RNA-binding proteins and chromatin modifiers is critical for lineage commitment.
Purpose of the Study:
- To investigate the role of LIN28A in the epigenetic regulation of ESC differentiation.
- To identify LIN28A interacting partners during differentiation.
- To elucidate the mechanism by which LIN28A influences chromatin dynamics.
Main Methods:
- Generation and analysis of Lin28a knockout (KO) ESCs.
- Proteomic analysis to identify LIN28A interactors.
- Chromatin immunoprecipitation followed by sequencing (ChIP-seq).
- Analysis of long non-coding RNA Neat1 interaction.
Main Results:
- Lin28a KO ESCs show specific defects in neural differentiation but not mesodermal or endodermal lineages.
- LIN28A interacts with Polycomb Repressive Complex 2 (PRC2) in an RNA-dependent manner.
- Loss of LIN28A leads to persistent PRC2 occupancy and altered H3K27me3 deposition at developmental gene promoters.
- LIN28A interacts with the lncRNA Neat1, potentially facilitating PRC2 eviction.
Conclusions:
- LIN28A plays a critical, neuron-specific role in regulating PRC2-mediated chromatin dynamics during ESC differentiation.
- LIN28A's function in regulating PRC2 chromatin dynamics is independent of its enzymatic activity.
- The lncRNA Neat1 may mediate LIN28A's role in PRC2 eviction and neuronal development.
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