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Related Concept Videos

Reporter Genes02:11

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.
Commonly used reporter...

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Updated: Jul 15, 2026

Massively Parallel Reporter Assays in Cultured Mammalian Cells
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Developing MR reporter genes: promises and pitfalls.

Assaf A Gilad1, Paul T Winnard, Peter C M van Zijl

  • 1Russell H. Morgan Department of Radiology and Radiological Science, Division of MR Research, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205, USA.

NMR in Biomedicine
|April 25, 2007
PubMed
Summary

Magnetic resonance (MR) reporter genes offer non-invasive, real-time monitoring of gene expression for applications like gene therapy. Newer strategies using metalloproteins show promise for overcoming current limitations in sensitivity and interpretation.

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Area of Science:

  • Biomedical Imaging
  • Molecular Biology
  • Gene Therapy

Background:

  • MR reporter genes enable non-invasive, high-resolution monitoring of biological processes.
  • Current limitations include low sensitivity, substrate dependency, and complex signal interpretation.
  • Despite challenges, significant advancements have been made in recent years.

Purpose of the Study:

  • To review the progress and challenges in developing MR reporter genes.
  • To explore emerging MRI-based approaches and their potential.
  • To compare MR reporter genes with optical and nuclear imaging techniques.

Main Methods:

  • Development of enzyme-based reporters for metabolic monitoring.
  • Emerging MRI approaches utilizing: enzyme cleavage of blocking groups, surface receptor binding of contrast agents, and expression of metalloproteins.
  • Review of promoter design, expression vectors, and transgene cloning.

Main Results:

  • Initial efforts focused on enzyme-based reporters for NMR spectroscopy.
  • MRI-based strategies now include contrast agent binding and metalloprotein expression (tyrosinase, transferrin receptor, ferritin).
  • Newer strategies aim to eliminate substrate requirements and improve signal detection.

Conclusions:

  • MR reporter gene technology is still in early development but progressing.
  • Substrate-free approaches and metalloprotein-based reporters offer significant growth potential.
  • MR reporter genes are a competitive alternative to optical and nuclear imaging modalities.