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Related Experiment Videos

Clonal lymphoid progenitor cell lines expressing the BCR/ABL oncogene retain full differentiative function.

P A Scherle1, K Dorshkind, O N Witte

  • 1Department of Microbiology, University of California, Los Angeles 90024.

Proceedings of the National Academy of Sciences of the United States of America
|March 1, 1990
PubMed
Summary

Researchers developed an in vitro system using BCR/ABL oncogene to study early hematopoiesis. This method allows for the observation of lymphoid progenitor cells differentiating into functional B cells, aiding in understanding B-cell development.

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Area of Science:

  • Hematology
  • Immunology
  • Molecular Biology

Background:

  • Studying early hematopoiesis is challenging due to difficulties in isolating homogeneous progenitor cells with self-renewal and differentiation capabilities.
  • The BCR/ABL oncogene is associated with stem-cell leukemias, making it a key factor in understanding hematopoietic malignancies.

Purpose of the Study:

  • To develop an in vitro system for studying early hematopoiesis and B-cell development.
  • To investigate the role of the BCR/ABL oncogene in promoting proliferation of early hematopoietic progenitor cells while maintaining their differentiation capacity.

Main Methods:

  • Transformation of murine bone-marrow cells with the BCR/ABL oncogene to generate clonal progenitor cell lines.
  • In vitro differentiation assays to assess B-cell development from progenitor cells.

Related Experiment Videos

  • Transfer of progenitor cells to severe combined immune deficiency (SCID) mice to evaluate in vivo differentiation and function.

    • Main Results:

    • Generated clonal lymphoid progenitor cell lines with an early phenotype, retaining germ-line immunoglobulin gene configuration.
    • Demonstrated in vitro differentiation to pre-B cells with diversity-joining (D-J) rearrangements and in vivo differentiation to functional, immunoglobulin-secreting B cells.
    • Identified a stromal cell-derived factor, distinct from interleukin-7, required for sustained progenitor cell growth stimulated by BCR/ABL.

    Conclusions:

    • BCR/ABL oncogene can drive proliferation of early hematopoietic progenitor cells without inhibiting their differentiation.
    • The developed in vitro system enables comprehensive study of B-cell development from clonal progenitors to plasma cells.
    • This model provides a valuable tool for investigating the molecular mechanisms underlying B-cell lineage commitment and maturation.