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Evidence for stem cell function of resting bone marrow lymphocytes identified by the complete 3H-thymidine labelling
Biomedicine / [Publiee Pour L'A.A.I.C.I.G.]
|July 1, 1975
Summary
Bone marrow lymphocytes exhibit stem cell properties, with some self-replication observed. These findings suggest small lymphocytes can transform into transitional cells during hematopoiesis.
Area of Science:
- Hematology
- Cell Biology
- Stem Cell Research
Background:
- Bone marrow lymphocytes are traditionally viewed as differentiated cells.
- The potential stem cell-like properties of lymphocytes are not fully understood.
Purpose of the Study:
- To investigate the stem cell properties of resting bone marrow small lymphocytes.
- To explore the self-replication capacity and differentiation potential of these cells.
Main Methods:
- Utilizing 3H-thymidine labeling to trace cell proliferation.
- Employing discontinuous albumin gradient fractionation to isolate cell populations.
- Culturing enriched cell fractions in diffusion chambers to assess growth and differentiation.
Main Results:
- Fraction 3, enriched in labeled small lymphocytes, demonstrated substantial growth in diffusion chambers.
- The number of labeled small lymphocytes remained constant or increased, suggesting self-replication.
- Appearance of transitional and blast cells preceded recognizable hematopoietic precursors, supporting lymphocyte transformation.
Conclusions:
- Resting bone marrow small lymphocytes possess stem cell-like properties, including self-replication.
- These lymphocytes can differentiate into transitional cells, contributing to normal hematopoiesis.
- A portion of the labeled small lymphocyte population may remain in a resting state.