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Related Experiment Video

Updated: May 31, 2026

Electrophoretic Mobility Shift Assay (EMSA) for the Study of RNA-Protein Interactions: The IRE/IRP Example
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Published on: December 4, 2014

Iron-refractory iron deficiency anemia.

Karin E Finberg1

  • 1Department of Pathology, Duke University Medical Center, Durham, NC.

Seminars in Hematology
|September 30, 2009
PubMed
Summary

Iron-refractory iron deficiency anemia (IRIDA) results from TMPRSS6 gene mutations, leading to high hepcidin levels and iron metabolism disruption. This condition is unresponsive to oral iron but may improve with injectable iron.

Area of Science:

  • Genetics
  • Hematology
  • Biochemistry

Background:

  • Iron-refractory iron deficiency anemia (IRIDA) presents as anemia unresponsive to oral iron.
  • IRIDA is linked to mutations in the TMPRSS6 gene, encoding liver-expressed matriptase-2.
  • Patients exhibit elevated hepcidin, a key regulator of iron homeostasis.

Purpose of the Study:

  • To discuss the clinical features of IRIDA.
  • To explore the molecular genetics of IRIDA.
  • To present recent findings on the pathophysiology of IRIDA.

Main Methods:

  • Genetic analysis of TMPRSS6 mutations.
  • Measurement of hepcidin levels in patients.
  • Investigation of TMPRSS6 function in iron metabolism.

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Last Updated: May 31, 2026

Electrophoretic Mobility Shift Assay (EMSA) for the Study of RNA-Protein Interactions: The IRE/IRP Example
12:44

Electrophoretic Mobility Shift Assay (EMSA) for the Study of RNA-Protein Interactions: The IRE/IRP Example

Published on: December 4, 2014

A Colorimetric Method for Measuring Iron Content in Plants
07:12

A Colorimetric Method for Measuring Iron Content in Plants

Published on: September 7, 2018

Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes
08:45

Quantitating Iron Transport Across the Mouse Placenta In Vivo Using Nonradioactive Iron Isotopes

Published on: May 10, 2022

Main Results:

  • Mutations in TMPRSS6 cause IRIDA.
  • TMPRSS6 encodes matriptase-2, a serine protease.
  • TMPRSS6 downregulates hepcidin by cleaving hemojuvelin, thus regulating iron absorption and release.

Conclusions:

  • IRIDA pathophysiology involves impaired hepcidin regulation due to TMPRSS6 mutations.
  • Understanding TMPRSS6 function clarifies iron metabolism control.
  • This research provides insights into a genetic cause of refractory anemia.