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Updated: May 1, 2026
09:43
Measurement of Heme Synthesis Levels in Mammalian Cells
Published on: July 9, 2015
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Fluorometric Methods to Measure Bioavailable and Total Heme.
Iramofu M Dominic1,2, Mathilda M Willoughby1,2, Abigail K Freer1,2
1School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, USA.
Methods in Molecular Biology (Clifton, N.J.)
|July 15, 2024
Summary
This study introduces new fluorescence methods to measure heme, an essential molecule involved in many diseases. These techniques allow researchers to track heme levels and movement within cells, aiding in understanding cellular health and disease.
Area of Science:
- Biochemistry
- Cell Biology
- Molecular Biology
Background:
- Heme b (iron protoporphyrin IX) is a vital molecule with diverse roles, including cofactor, signaling, and iron source.
- Dysregulation of heme metabolism is implicated in numerous diseases like cancer, neurodegeneration, and anemias.
- Accurate methods for measuring and visualizing heme are crucial for understanding its cellular functions and disease pathologies.
Purpose of the Study:
- To develop and present novel fluorescence-based protocols for assessing heme bioavailability and trafficking dynamics.
- To establish a fluorometric assay for quantifying total heme and its precursor, protoporphyrin IX.
- To provide tools for studying heme homeostasis in various cell types and organisms.
Main Methods:
- Utilized genetically encoded fluorescent heme sensors.
- Employed advanced imaging techniques such as confocal microscopy and flow cytometry.
- Incorporated microplate readers for high-throughput measurements.
- Developed a fluorometric assay leveraging porphyrin fluorescence for total heme and protoporphyrin IX quantification.
Main Results:
- Demonstrated the successful application of fluorescence-based protocols to probe heme bioavailability.
- Enabled the dynamic monitoring of heme trafficking within cells.
- Provided a reliable method for measuring total heme and protoporphyrin IX levels.
- Validated the utility of these methods across diverse cell types and organisms.
Conclusions:
- The described fluorescence-based and fluorometric methods offer powerful tools for studying heme homeostasis.
- These techniques facilitate the investigation of heme's role in both normal physiology and disease pathophysiology.
- The developed protocols can be widely applied to advance research in cell biology and metabolic disorders.
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