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Review
. 2023 Jun;24(6):383-395.
doi: 10.1038/s41580-022-00549-9. Epub 2022 Nov 7.

Identification of non-coding silencer elements and their regulation of gene expression

Baoxu Pang #  1 , Jan H van Weerd #  2 , Feija L Hamoen #  2 , Michael P Snyder  3
Affiliations
Review

Identification of non-coding silencer elements and their regulation of gene expression

Baoxu Pang et al. Nat Rev Mol Cell Biol. 2023 Jun.

Abstract

Cell type- and differentiation-specific gene expression is precisely controlled by genomic non-coding regulatory elements (NCREs), which include promoters, enhancers, silencers and insulators. It is estimated that more than 90% of disease-associated sequence variants lie within the non-coding part of the genome, potentially affecting the activity of NCREs. Consequently, the functional annotation of NCREs is a major driver of genome research. Compared with our knowledge of other regulatory elements, our knowledge of silencers, which are NCREs that repress the transcription of genes, is largely lacking. Multiple recent studies have reported large-scale identification of transcription silencer elements, indicating their importance in homeostasis and disease. In this Review, we discuss the biology of silencers, including methods for their discovery, epigenomic and other characteristics, and modes of function of silencers. We also discuss important silencer-relevant considerations in assessing data from genome-wide association studies and shed light on potential future silencer-based therapeutic applications.

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