Related Experiment Videos
A microcytofluorometric method for quantitative and qualitative evaluation of CFU-E and BFU-E colonies
1First Department of Internal Medicine, Kyoto Prefectural University of Medicine, Japan.
Histochemistry
|January 1, 1990
Summary
A novel photochemical method precisely identifies human bone marrow erythroid progenitor cells (CFU-E and BFU-E) and measures hemoglobin. This fluorescence-based technique is more sensitive and specific than traditional methods.
Area of Science:
- Hematology
- Cell Biology
- Biochemistry
Background:
- Accurate identification of erythroid progenitor cells is crucial for understanding hematopoiesis.
- Existing methods like the benzidine reaction have limitations in sensitivity and specificity.
Purpose of the Study:
- To develop a precise method for identifying human bone marrow colony forming unit erythroid (CFU-E) and burst forming unit erythroid (BFU-E) colonies.
- To determine hemoglobin content in these colonies using microcytofluorometry.
Main Methods:
- Utilized a photochemical reaction converting intracellular hemoglobin to fluorescent porphyrin under violet light (405 nm) with an SH-donor.
- Analyzed red fluorescence emission peaks at 600 and 650 nm characteristic of porphyrin.
Main Results:
- CFU-E and BFU-E colonies exhibited porphyrin fluorescence, distinct from colony forming unit granulocyte-macrophage (CFU-GM) colonies.
- The photochemical method detected fluorescence earlier (day 4) than the benzidine reaction (day 9).
- Fluorescence intensity correlated with hemoglobin levels after 50 min of reaction.
Conclusions:
- The photochemical method offers superior specificity and sensitivity for identifying CFU-E and BFU-E compared to the benzidine reaction.
- This technique allows for quantitative assessment of hemoglobin content within erythroid progenitor colonies.