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Updated: Aug 19, 2026

Deacetylation Assays to Unravel the Interplay between Sirtuins (SIRT2) and Specific Protein-substrates
Published on: February 27, 2016
Focus on deacetylation for therapeutic benefit
Shabana Shabbeer1, Michael A Carducci
1Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Medical Institutions, Baltimore, MD 21231, USA.
Abstract:
Preclinical studies have demonstrated that several genes silenced in cancer cells can be re-expressed in their fully functional state by epigenetic modifiers such as DNA methyltransferase inhibitors and histone deacetylase inhibitors (HDACIs). While gene re-expression may be a reason for the success of HDACIs in preclinical and clinical studies, it is not the only factor. HDACIs display pleiotropic effects, including inhibition of cell cycle progression, differentiation, apoptosis and anti-proliferative effects. In addition, many studies have indicated that combining HDACIs with other agents results in an enhanced anti-proliferative effect. Structure-activity relationship studies of HDACIs with their substrates, histone deacetylases, have enabled design and synthesis of improved HDACIs. Due to their activity and perceived low toxicity, HDACIs have gained popularity as agents for clinical investigation. This review focuses on the cellular and biological effects of HDACIs, either alone or in combination with other agents. A brief summary on completed and ongoing cancer clinical trials is provided.
Insights
Histone deacetylase inhibitors (HDACIs) can re-express silenced genes in cancer cells. These epigenetic modifiers also show anti-cancer effects alone or in combination therapies, driving clinical investigation.
Area of Science:
- Epigenetics
- Cancer Biology
- Pharmacology
Background:
- Cancer cells often silence crucial genes.
- Epigenetic modifiers, like histone deacetylase inhibitors (HDACIs), can re-express these silenced genes.
- HDACIs exhibit multiple anti-cancer mechanisms beyond gene re-expression.
Purpose of the Study:
- To review the cellular and biological effects of HDACIs.
- To explore the efficacy of HDACIs alone and in combination therapies.
- To summarize ongoing and completed clinical trials involving HDACIs.
Main Methods:
- Review of preclinical and clinical studies on HDACIs.
- Analysis of structure-activity relationships of HDACIs.
- Compilation of data from cancer clinical trials.
Main Results:
- HDACIs re-express silenced genes and have pleiotropic anti-cancer effects.
- Combination therapies with HDACIs enhance anti-proliferative activity.
- Improved HDACIs have been designed based on structure-activity relationships.
Conclusions:
- HDACIs are promising epigenetic drugs for cancer therapy.
- Their broad biological effects and low toxicity support clinical investigation.
- Further research and clinical trials are ongoing to optimize HDACI-based treatments.
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