Related Experiment Video
Updated: May 15, 2026

In Vivo Nanovector Delivery of a Heart-specific MicroRNA-sponge
Published on: June 15, 2018
Regulation of the MIR155 host gene in physiological and pathological processes
Terry S Elton1, Helina Selemon, Shane M Elton
1Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, USA; College of Pharmacy, Division of Pharmacology, The Ohio State University, Columbus, OH, USA; Department of Medicine, Division of Cardiology, The Ohio State University, Columbus, OH, USA.
Abstract:
MicroRNAs (miRNAs), a family of small nonprotein-coding RNAs, play a critical role in posttranscriptional gene regulation by acting as adaptors for the miRNA-induced silencing complex to inhibit gene expression by targeting mRNAs for translational repression and/or cleavage. miR-155-5p and miR-155-3p are processed from the B-cell Integration Cluster (BIC) gene (now designated, MIR155 host gene or MIR155HG). MiR-155-5p is highly expressed in both activated B- and T-cells and in monocytes/macrophages. MiR-155-5p is one of the best characterized miRNAs and recent data indicate that miR-155-5p plays a critical role in various physiological and pathological processes such as hematopoietic lineage differentiation, immunity, inflammation, viral infections, cancer, cardiovascular disease, and Down syndrome. In this review we summarize the mechanisms by which MIR155HG expression can be regulated. Given that the pathologies mediated by miR-155-5p result from the over-expression of this miRNA it may be possible to therapeutically attenuate miR-155-5p levels in the treatment of several pathological processes.
Insights
MicroRNAs regulate gene expression. This review details how MIR155HG gene expression is controlled and discusses therapeutic strategies targeting miR-155-5p for various diseases.
Area of Science:
- Molecular Biology
- Genetics
- Immunology
Background:
- MicroRNAs (miRNAs) are small noncoding RNAs crucial for posttranscriptional gene regulation.
- miR-155-5p, processed from the MIR155 host gene (MIR155HG), is highly expressed in immune cells.
- miR-155-5p is implicated in diverse physiological and pathological processes, including immunity, inflammation, and cancer.
Purpose of the Study:
- To review the regulatory mechanisms of MIR155HG expression.
- To explore the role of miR-155-5p in various diseases.
- To discuss potential therapeutic strategies targeting miR-155-5p.
Main Methods:
- Literature review of studies on MIR155HG regulation and miR-155-5p function.
- Analysis of data linking miR-155-5p dysregulation to disease pathogenesis.
- Synthesis of information on therapeutic approaches.
Main Results:
- MIR155HG expression is subject to complex regulation.
- Overexpression of miR-155-5p is associated with numerous pathologies.
- miR-155-5p plays a significant role in immune cell differentiation and function.
Conclusions:
- Understanding MIR155HG regulation is key to controlling miR-155-5p levels.
- Therapeutic attenuation of miR-155-5p may offer treatment options for miR-155-5p-mediated diseases.
- miR-155-5p is a critical regulator in immunity and disease.
Related Concept Videos
MicroRNAs
MicroRNAs
MicroRNAs
Regulation of Expression at Multiple Steps
Master Transcription Regulators
Constitutive and Regulated Gene Expression

