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Identification and Analysis of Mouse Erythroid Progenitors using the CD71/TER119 Flow-cytometric Assay
Published on: August 5, 2011
Expression of red cell membrane proteins in erythroid precursor cells
Journal of Supramolecular Structure
|January 1, 1980
Summary
Specific antibodies revealed that glycophorin A and spectrin are key markers for red blood cell development in bone marrow. These proteins are present from early precursors, confirming their role in erythropoiesis.
Area of Science:
- Hematology
- Cell Biology
- Immunology
Background:
- Glycophorin A and spectrin are crucial membrane proteins in red blood cells.
- Understanding their expression is vital for studying erythropoiesis and related pathologies.
Purpose of the Study:
- To investigate the expression patterns of glycophorin A and spectrin in normal and pathological human bone marrow.
- To determine the specificity of these proteins for the red blood cell lineage.
Main Methods:
- Immunofluorescence microscopy using specific antibodies against human glycophorin A and spectrin.
- Analysis of bone marrow cells from healthy individuals and patients with erythropoiesis blocks.
- Studies on spleen cells from anemic mice.
Main Results:
- Glycophorin A and spectrin were detected in 50-60% of nucleated cells in normal bone marrow.
- Expression was observed from the proerythroblast stage, indicating presence throughout red cell differentiation.
- These proteins were specific to the red cell series, absent in lymphocytic, granulocytic cells, and platelets.
- Studies on anemic mice showed increased expression of a related sialoglycoprotein in spleen cells.
Conclusions:
- Glycophorin A and spectrin are reliable markers for identifying red blood cell precursors.
- Their expression is tightly regulated during erythropoiesis.
- The human tumor cell line K562 expresses both proteins, but their expression is not inducible by tested agents.
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