DNA methylation and demethylation probed by small molecules.

Area of Science:

• Epigenetics
• Molecular Biology
• Genetics

Background:

• DNA methylation is a key epigenetic mechanism regulating gene expression during development.
• Altered DNA methylation patterns are implicated in various human diseases.
• Unlike genetic mutations, epigenetic changes like DNA methylation are potentially reversible, offering therapeutic avenues.

Purpose of the Study:

• To review the current understanding of DNA methylation and demethylation processes.
• To explore the therapeutic potential of targeting these epigenetic machineries.
• To highlight the need for developing inhibitors for both DNA methylating and demethylating activities.

Main Methods:

• This review synthesizes existing research on DNA methylation and demethylation.
• It discusses the roles of DNA methyltransferases (DNMTs) and demethylating enzymes.
• The focus is on the therapeutic implications of targeting these enzymes with small molecule inhibitors.

Main Results:

• DNA methylation is dynamically regulated by both methylating and demethylating activities in both mitotic and postmitotic cells.
• Current therapeutic strategies primarily focus on DNMT inhibitors for cancer.
• The lack of understanding of DNA demethylating enzymes hinders the development of demethylation inhibitors.

Conclusions:

• The dynamic nature of DNA methylation necessitates targeting both its establishment and removal for therapeutic benefit.
• Expanding therapeutic strategies beyond DNMT inhibitors to include demethylation targets is crucial.
• Further research into DNA demethylating activities will unlock new therapeutic potentials for a wider range of diseases.