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Benzidine positive multicentric eosinophilic colonies in human blood mimicking erythroid bursts.
Experimental Hematology
|January 1, 1982
Summary
Researchers identified two types of benzidine-positive colonies from human blood cells. These colonies, cultured with erythropoietin, were characterized as either erythroid bursts or eosinophils based on cell morphology and cytochemical properties.
Area of Science:
- Hematology
- Cell Biology
- Immunology
Background:
- Human mononuclear blood cells can differentiate into various myeloid lineages.
- Erythropoietin is a key regulator of erythropoiesis.
- Benzidine staining is a method to detect hemoglobin and related compounds.
Purpose of the Study:
- To characterize different types of benzidine-positive colonies formed by human mononuclear blood cells in culture.
- To identify the cell types within these colonies using morphological and cytochemical analyses.
Main Methods:
- Culture of human mononuclear blood cells in plasma clot or methylcellulose with erythropoietin.
- Microscopic examination of benzidine-positive colonies.
- Cytochemical staining including benzidine reaction, luxol fast blue, and alkaline eosin.
Main Results:
- Two distinct types of benzidine-positive colonies were observed: erythroid bursts and neutrophil/macrophage-like cells.
- Erythroid bursts contained diffusely stained erythroblasts.
- The second type of colony, identified as eosinophils, showed diffusely and/or granular staining, resistance to potassium cyanide in benzidine reaction, and positive staining with luxol fast blue and alkaline eosin.
Conclusions:
- Human mononuclear blood cells cultured with erythropoietin can generate both erythroid and eosinophilic progenitor cells.
- Cytochemical properties are crucial for differentiating between erythroid and eosinophilic colonies.
- This study provides insights into the differentiation potential of human hematopoietic progenitor cells.