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Reporter Genes

Reporter Genes

Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.

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Related Experiment Video

Updated: Apr 16, 2026

siRNA Screening to Identify Ubiquitin and Ubiquitin-like System Regulators of Biological Pathways in Cultured Mammalian Cells

siRNA Screening to Identify Ubiquitin and Ubiquitin-like System Regulators of Biological Pathways in Cultured Mammalian Cells

Published on: May 24, 2014

Hypoxia-sensitive reporter system for high-throughput screening.

Tadayuki Tsujita¹, Shin-ichi Kawaguchi, Takashi Dan

¹Department of Medical Biochemistry, Sendai, Miyagi, Japan; Department of Molecular Medicine and Therapy, Tohoku University Graduate School of Medicine, tada@med.tohoku.ac.jp

The Tohoku Journal of Experimental Medicine

|March 10, 2015

Summary

Researchers developed a new screening system to discover drugs that activate hypoxia-inducible factors (HIFs). This system directly monitors HIF-α transcription, aiding the development of therapies for ischemic diseases.

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Area of Science:

Biochemistry
Molecular Biology
Pharmacology

Background:

Ischemic diseases (heart, kidney, brain) are a major health concern.
Activating anti-hypoxic stress responses via the PHD-HIF-α pathway is a potential therapeutic strategy.
Current methods for identifying HIF-α activating compounds lack direct transcriptional monitoring.

Purpose of the Study:

To develop a high-throughput screening (HTS) system for discovering potent inducers of hypoxia-inducible factors (HIFs).
To establish a reliable reporter system that directly monitors HIF-α transcriptional output.

Main Methods:

Generated a HIF-α-dependent reporter construct using Metridia luciferase (MLuc) regulated by hypoxia-responsive elements (HREs).
Stably integrated the construct into human neuroblastoma cells (SK-N-BE(2)c) to create SKN:HRE-MLuc.
Optimized the system by replacing MLuc with Nano luciferase (NLuc) for improved performance, creating SKN:HRE-NLuc.

Main Results:

The SKN:HRE-MLuc system demonstrated concentration- and time-dependent responses to hypoxia.
The SKN:HRE-NLuc system exhibited significantly enhanced reporter activity compared to the MLuc version.
The developed reporter system is suitable for high-throughput screening applications.

Conclusions:

The SKN:HRE-NLuc system is an effective and improved platform for HTS of HIF-α inducers.
This system facilitates the discovery of novel chemical compounds targeting the PHD-HIF-α pathway.
The developed platform holds promise for advancing therapeutic strategies against ischemic diseases.