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Developmental programs of human erythroleukemia cells: globin gene expression and methylation
T Enver1, J W Zhang, N P Anagnou
1Division of Medical Genetics, University of Washington, Seattle 98195.
Molecular and Cellular Biology
|November 1, 1988
Summary
Adult erythroleukemic cell lines show diverse globin gene expression patterns that mimic normal development. This suggests fetal or embryonic potential exists in normal adult hematopoietic progenitors, not just neoplastic transformation.
Area of Science:
- Hematology
- Molecular Biology
- Genetics
Background:
- Human erythroleukemic cell lines offer models to study globin gene regulation.
- Understanding globin gene expression is crucial for diagnosing and treating anemias and hemoglobinopathies.
Purpose of the Study:
- To investigate globin gene expression and methylation patterns in novel and known adult human erythroleukemic cell lines.
- To determine if observed expression patterns reflect normal developmental programs.
Main Methods:
- Analysis of globin gene expression (epsilon, gamma, delta, beta, zeta) via RNA transcripts.
- Assessment of globin gene methylation patterns.
- Comparison of cell line data with normal human hematopoietic development.
Main Results:
- Cell lines exhibited diverse globin gene expression, with high-level gamma-globin common.
- Expression patterns of embryonic (epsilon, zeta) and adult (delta, beta) globin mRNAs varied among lines.
- Globin gene methylation generally correlated with expression profiles, mirroring normal cell patterns.
Conclusions:
- Globin gene expression and methylation programs in these cell lines, though diverse, followed developmental logic, mimicking normal human development.
- The findings suggest that fetal or embryonic globin expression in adult erythroleukemic cells indicates potential in normal adult hematopoietic progenitors.
- Several cell lines may originate from multipotent hematopoietic progenitor cells.