Adenosine kinase: An epigenetic modulator in development and disease

Area of Science:

• Biochemistry
• Epigenetics
• Molecular Biology

Background:

• Adenosine kinase (ADK) is crucial for adenosine metabolism, converting adenosine to 5'-adenosine monophosphate.
• ADK exists as two isoforms, ADK-long (ADK-L) and ADK-short (ADK-S), with distinct subcellular localizations and developmental regulation.
• ADK-L's nuclear localization suggests a role in gene regulation through epigenetic mechanisms.

Purpose of the Study:

• To review the biochemical interactions between adenosine metabolism by ADK-L and epigenetic modifications.
• To provide a comprehensive overview of ADK-associated DNA methylation changes in development and disease.
• To discuss challenges and therapeutic potential of targeting ADK's epigenetic role.

Main Methods:

• Literature review summarizing recent research on ADK, adenosine metabolism, and epigenetics.
• Analysis of biochemical pathways linking ADK activity to transmethylation and DNA methylation.
• Compilation of evidence on ADK's role in various physiological and pathological conditions.

Main Results:

• ADK plays an adenosine receptor-independent role in regulating global DNA methylation status.
• ADK-L is linked to epigenetic regulation through its involvement in transmethylation reactions.
• Aberrant ADK activity is associated with DNA methylation changes in conditions like brain injury, epilepsy, cancer, and diabetes.

Conclusions:

• Adenosine kinase, particularly ADK-L, is a key player in epigenomic regulation via DNA methylation.
• Understanding ADK's epigenetic functions offers potential therapeutic strategies for various diseases.
• Further research is needed to overcome challenges in targeting ADK for therapeutic benefit.