Sequence Variants Found to Drive Correlation between DNA Methylation and Gene Expression

Icelandic researchers have uncovered a crucial link between sequence variants, DNA methylation, and gene expression. This discovery, published in Nature Genetics, exposes the complex interplay between genetics and disease progression.

The study utilized Nanopore sequencing technology, which allows for real-time analysis of DNA sequences and detection of chemical modifications such as methylation. This approach enabled researchers to measure DNA methylation across the entire genome and distinguish between parental chromosomes.

By examining CpG methylation, gene expression, and sequence variants at the haplotype level, the scientists demonstrated that sequence variants are the primary drivers of the correlation between DNA methylation and gene expression. These variants were also found to be associated with various diseases and human traits.

One of the study's most significant findings is its potential to explain how noncoding genetic variants contribute to disease development. The majority of disease-linked variants are located in noncoding regions of the genome, making their impact challenging to understand. However, by analyzing the effects on DNA methylation, researchers were able to connect these variants to previously identified disease-associated sequences.

This research will help advance our understanding of the complex relationships between genetic variations, epigenetic modifications, and gene expression. It provides valuable insights into the mechanisms underlying disease progression and opens up new avenues for targeted therapeutic interventions.