Key terms to define before reader begins to read this short article : 
- Epigenetics: an evolving field that studies heritable changes in gene expression, occurring without changes to the DNA sequence itself
- Cardiovascular disease (CVD): a term utilised to describe conditions affecting the heart or blood vessels
Hypermethylation: “an epigenetic feature that modulates gene expression and its dysregulation is observed in cancer.” 

 

Introduction:
DNA Methylation is the process that involves the addition of a methyl group to a cytosine base in a particular nucleotide base pair. Moreover, epigenetic mechanisms regulate gene expression without changing the DNA sequence and an understanding of this is imperative because, these mechanisms, DNA methylation in particular aid in the process of disease pathogenesis. This short essay will be discovering the emerging role of DNA methylation in identifying heart disease. It will explain DNA methylation as a process and will further describe the application of this concept in different scenarios, ultimately ending on the subject of heart disease

 

DNA Methylation and Epigenetics:
Firstly, epigenetic mechanisms such as DNA methylation greatly regulate gene expression by influencing the accessibility of DNA to transcription factors and altering chromatin structure. According to an article by “Basics in Cardiology”,  DNA Methylation involves the input of a methyl group to cytosine residues in CpG nucleotides, found in typically unmethylated regions called CpG islands found in promoter regions of genes. However, the abnormal methylation of CpG islands lead to the silencing of gene expression, altering biological function, hence making it a disease-causing factor. 

 

Linking DNA Methylation to Heart Disease
Consequently, the same article by basics in Cardiology further mentions that, DNA methylation plays an integral role in gene regulation and expression, especially in microRNAs (miRNAs) and long non-coding RNAs (lncRNAs), which are often associated with maladies such as cancer and cardiovascular disease. An example can be seen in the context of colorectal cancer where  miR-137 is often silenced due to promoter hypermethylation, but the restoration of its expression can occur with demethylating agents.

 

Furthermore, altering DNA methylation patterns have been associated with escalating gene expression that is positively correlated to angiogenic factors and cardiac function. Moreover, prenatal exposure to adverse conditions in the environment such as carcinogens and illicit drugs can effectively alter methylation patterns associated with an elevated probability of cardiovascular disease later in life.

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Diagnostic and Therapeutic Implications 
Finally, comprehending the mechanism of DNA methylation in CVD pathogenesis raises questions about the molecular mechanisms underlying disease progression. Further research into the epigenetic regulation of DNA methylation in cardiovascular disease may offer therapeutic goals for intervention.

In conclusion, DNA methylation in cardiovascular disease is becoming increasingly relevant especially due to the role it plays in gene regulation, therefore cardiac function. Continued research could open venues for developing target treatments and improving patient outcomes. As our understanding of epigenetics as a field of knowledge continues to grow, so will our ability to combat CVD. 

 

Works Cited 

Lorenzen, J. M., Martino, F., & Thum, T. (2012). Epigenetic modifications in cardiovascular disease. Basic Research in Cardiology, 107(2). https://doi.org/10.1007/s00395-012-0245-9

Idris, M., Coussement, L., Alves, M. M., De Meyer, T., & Melotte, V. (2023). Promoter hypermethylation of neural-related genes is compatible with stemness in solid cancers. Epigenetics & Chromatin, 16(1). https://doi.org/10.1186/s13072-023-00505-7