IPMK depletion influences genome-wide DNA methylation

Area of Science:

• Epigenetics
• Molecular Biology
• Genomics

Background:

• Inositol polyphosphate multikinase (IPMK) is a nuclear regulator linked to gene expression.
• IPMK modulates histone acetylation by activating histone deacetylases 1/3 (HDAC1/3).
• HDAC1/3 interact with DNA methyltransferase 1 (DNMT1), influencing DNA methylation.

Purpose of the Study:

• To investigate the influence of IPMK genetic depletion on DNA methylation patterns.
• To identify genes affected by IPMK-mediated DNA methylation changes.
• To explore the functional consequences of altered DNA methylation in IPMK-depleted cells.

Main Methods:

• Long-read Oxford Nanopore sequencing for genome-wide methylation analysis (>28 million CpG sites).
• RNA-sequencing (RNA-seq) to assess gene expression levels.
• Bioinformatic integration of methylation and gene expression data.

Main Results:

• IPMK deletion resulted in over 22,000 differentially methylated regions (DMRs).
• 35 genes exhibited an inverse correlation between promoter methylation and gene expression.
• Genes involved in tissue remodeling and hematopoiesis were significantly affected, including MMP14 and LIF, with decreased mRNA and protein expression.

Conclusions:

• IPMK is identified as a novel regulator of DNA methylation.
• IPMK depletion impacts DNA methylation dynamics, affecting gene expression.
• Future research will explore the role of IPMK's kinase activity in these epigenetic modifications.