Related Experiment Video
Updated: Dec 8, 2025
14:47
Identification of MyoD Interactome Using Tandem Affinity Purification Coupled to Mass Spectrometry
Published on: May 17, 2016
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Poly(ADP-ribose) Polymerase 1 (PARP1) restrains MyoD-dependent gene expression during muscle differentiation
Francesca Matteini1,2, Oriella Andresini2, Stefano Petrai2
1Institut D'Investigació Biomèdica de Bellvitge (IDIBELL), P-CMR[C], Hospital Duran I Reynals Gran Via de L'Hospitalet, 199-203, L'Hospitalet de Llobregat, 08908, Barcelona, Spain.
Scientific Reports
|September 16, 2020
Summary
Poly(ADP-ribose) polymerase 1 (PARP1) represses skeletal muscle gene activation by MyoD. Depleting PARP1 enhances MyoD target gene expression, revealing a novel epigenetic regulator of myogenesis.
Area of Science:
- Molecular Biology
- Epigenetics
- Muscle Development
Background:
- MyoD is a key regulator of skeletal muscle differentiation.
- Epigenetic factors can constrain MyoD's transcriptional activity.
- Poly(ADP-ribose) polymerase 1 (PARP1) is involved in DNA repair and transcriptional regulation.
Purpose of the Study:
- To investigate the role of PARP1 in MyoD-dependent gene expression during skeletal muscle differentiation.
- To elucidate the mechanisms by which PARP1 influences MyoD's function.
Main Methods:
- Analysis of MyoD target gene expression in cells with varying PARP1 levels.
- Chromatin immunoprecipitation to assess protein interactions.
- Histone modification analysis.
Main Results:
- PARP1 depletion enhances the expression of MyoD target genes (p57, myogenin, Mef2C, p21).
- PARP1 directly interacts with MyoD-binding regions, hindering MyoD recruitment.
- PARP1 binding correlates with reduced H3K4me3 histone modification at target loci.
- PARP1's repressive effect is independent of its enzymatic activity.
Conclusions:
- PARP1 acts as a novel repressor of MyoD-mediated transcription during myogenesis.
- PARP1 employs a catalytic-independent mechanism to regulate gene expression.
- This study identifies PARP1 as a significant player in the epigenetic control of skeletal muscle differentiation.
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