Related Experiment Video
Updated: Aug 30, 2026

In Vitro Selection of Engineered Transcriptional Repressors for Targeted Epigenetic Silencing
Published on: May 5, 2023
Reactivation of silenced genes and transcriptional therapy
1Institute of Medical Genetics, Catholic University, Rome, Italy.
Abstract:
The purpose of this review is to discuss the potential role of "transcriptional therapy" to modulate the expression of target genes in order to treat monogenic as well as multifactorial disorders. In vitro and in vivo experiments with DNA demethylating and histone hyperacetylating drugs are currently performed in several laboratories on a variety of genes. In attempting to place these results into perspective, we divided the target genes into four major categories: (1) single genes with a hypermethylated CpG island; (2) single genes without a CpG island; (3) groups of genes silenced by aberrant DNA methylation; and (4) groups of genes silenced by lack of histone acetylation. We discuss the latest advances in the field of chromatin regulation and, in particular, the role of histone methylation and that of RNA interference in gene silencing. We can expect that in the future regulation of transcription will become an effective treatment for several genetic conditions.
Insights
Transcriptional therapy offers a promising approach to treat genetic disorders by modulating gene expression. This review explores targeting DNA methylation and histone acetylation for therapeutic gene regulation.
Area of Science:
- Molecular Biology
- Epigenetics
- Genetics
Background:
- Gene expression is crucial for cellular function and development.
- Aberrant gene silencing, through DNA methylation or histone modifications, underlies various genetic disorders.
- Current research explores epigenetic modifications as therapeutic targets.
Purpose of the Study:
- To review the potential of transcriptional therapy for treating genetic disorders.
- To categorize target genes based on their epigenetic status and silencing mechanisms.
- To discuss advances in chromatin regulation relevant to gene therapy.
Main Methods:
- Categorization of target genes into four groups based on methylation and acetylation status.
- Review of in vitro and in vivo experimental data using epigenetic drugs.
- Discussion of chromatin regulation mechanisms, including histone methylation and RNA interference.
Main Results:
- Transcriptional therapy aims to restore normal gene expression.
- DNA demethylating and histone hyperacetylating drugs are being investigated.
- Understanding chromatin regulation is key to developing effective gene therapies.
Conclusions:
- Transcriptional therapy holds significant potential for treating monogenic and multifactorial disorders.
- Future advancements in transcription regulation could lead to effective genetic treatments.
- Epigenetic modifications represent a viable therapeutic strategy for genetic conditions.
Related Concept Videos
Gene Therapy
Co-activators and Co-repressors
Methods of Nuclear Reprogramming
Somatic to iPS Cell Reprogramming
Chromatin Modification in iPS Cells
Compact chromatin makes reprogramming difficult. Enzymes, such as histone demethylases and acetyltransferases, are often added during reprogramming to loosen the chromatin, making the DNA more accessible to transcription factors. Molecules that inhibit histone...
Eukaryotic Transcription Inhibitors
Eukaryotic transcription inhibitors usually contain two distinct domains, a DNA...

