Folate deficiency inhibits the PCP pathway and alters genomic methylation levels during embryonic development

Area of Science:

• Developmental Biology
• Epigenetics
• Molecular Biology

Background:

• Folate deficiency is linked to abnormal embryonic development.
• The precise molecular mechanisms, particularly concerning the planar cell polarity (PCP) pathway, are not fully understood.
• Vangl gene mutations, part of the PCP pathway, are known to cause developmental defects.

Purpose of the Study:

• To investigate the impact of folate deficiency on the PCP pathway.
• To explore the role of DNA methylation in folate deficiency-induced embryonic developmental issues.
• To identify the specific genes and pathways affected by folate deficiency.

Main Methods:

• Analyzing Vangl gene expression and Vangl protein-Dvl binding in folate-deficient conditions.
• Employing reduced representation bisulfite sequencing (RRBS) to assess global DNA methylation profiles in mouse embryos.
• Utilizing Gene Ontology (GO) analysis to categorize genes within differentially methylated regions (DMRs).

Main Results:

• Folate deficiency was found to inhibit Vangl gene expression and Vangl protein binding to Dvl.
• Significant alterations in genomic methylation levels were observed in mouse embryos under folate deficiency.
• Genes within DMRs were predominantly involved in biological regulation, cellular processes, development, metabolism, and signaling pathways.

Conclusions:

• Folate deficiency negatively impacts the PCP pathway, potentially through epigenetic modifications.
• Altered DNA methylation patterns in folate-deficient embryos lead to the down-regulation of crucial developmental genes.
• These molecular changes provide insight into the mechanisms by which folate deficiency disrupts embryonic development.