Epigenetic modulation by inorganic metal complexes

•Epigenetic modulation has emerged as a promising strategy for the treatment of human diseases, particularly cancer.•Recently, a number of metal-based epigenetic modulators have been identified.•Metal complexes can target histones or epigenetic modification enzymes.

Epigenetic mechanisms have emerged as key targets for therapeutic intervention. However, while a number of organic small-molecular “epidrugs” have been approved for clinical use, no metal-based epigenetic modulator have been successfully approved. Metal complexes exhibit a variety of distinct properties that make them viable alternatives to organic molecules as therapeutic agents. In this review, we highlight recent examples of epigenetic modulation by metal complexes, with a view towards showcasing the different mechanisms exploited by metal complexes for targeting either epigenetic marks or epigenetic pathways for potential therapeutic applications.