YTHDF1 impacts cardiomyocyte differentiation by regulating the TET2 mRNA

Area of Science:

• Molecular Biology
• Cardiovascular Biology
• Epigenetics

Background:

• Cardiomyocyte differentiation is crucial for cardiac development and function.
• The m6A modification reader YTHDF1 is known to impact cardiomyocyte differentiation, but its direct mRNA targets are not fully understood.
• Understanding YTHDF1's role is vital for addressing cardiac diseases stemming from impaired cardiomyocyte development.

Purpose of the Study:

• To identify direct mRNA targets of YTHDF1 during cardiomyocyte differentiation.
• To investigate the correlation between YTHDF1 expression and cardiac differentiation and pathology.
• To elucidate the mechanism by which YTHDF1 influences cardiomyocyte development.

Main Methods:

• Analysis of public databases for YTHDF1 expression patterns in cardiac differentiation and pathology.
• Generation of YTHDF1-knockdown H9C2 cardiomyoblast cell lines.
• RNA immunoprecipitation sequencing (RIP-seq) to identify YTHDF1-bound mRNAs.
• Assessment of cardiomyocyte differentiation markers (cTnT/cTnI) and TET2 protein levels.

Main Results:

• YTHDF1 expression increases during cardiomyocyte differentiation and declines with maturation.
• YTHDF1 knockdown in H9C2 cells impaired differentiation and reduced maturation markers.
• RIP-seq identified TET2 mRNA as a direct target of YTHDF1.
• YTHDF1 regulates TET2 protein levels post-transcriptionally and promotes cardiomyocyte differentiation.

Conclusions:

• YTHDF1 plays a critical role in promoting cardiomyocyte differentiation.
• YTHDF1 regulates TET2 protein translation, which is essential for cardiac development.
• YTHDF1 is a potential therapeutic target for cardiac diseases associated with impaired cardiomyocyte differentiation.