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Related Experiment Videos

Alterations in bone-marrow cellularity following thymectomy in rats.

H L Lipscomb, J G Sharp

    Experientia
    |October 15, 1979
    PubMed
    Summary

    Neonatal thymectomy in rats reduced bone marrow cells. This reduction was reversed by lymphoid cells or testis implantation, indicating lymphoid cells and sex steroids influence marrow cellularity.

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    Area of Science:

    • Immunology
    • Endocrinology
    • Hematology

    Background:

    • Neonatal thymectomy impacts immune cell development.
    • Bone marrow cellularity is crucial for hematopoiesis.
    • The role of sex steroids in immune regulation is under investigation.

    Purpose of the Study:

    • To investigate the effect of neonatal thymectomy on rat bone marrow cellularity.
    • To determine if lymphoid cells or sex steroids can restore bone marrow cellularity after thymectomy.
    • To explore the interplay between lymphoid cells and sex steroids in regulating bone marrow.

    Main Methods:

    • Neonatal thymectomy was performed on rats.
    • Subsequent administration of syngeneic lymphoid cells or syngeneic testis implantation was conducted.
    • Bone marrow nucleated cell counts were assessed.

    Main Results:

    • Neonatal thymectomy led to a decrease in nucleated bone marrow cells.
    • Administration of syngeneic lymphoid cells corrected this decrease.
    • Implantation of a syngeneic testis also restored normal bone marrow cellularity.

    Conclusions:

    • Lymphoid cells play a partial role in controlling bone marrow cellularity in rats.
    • Sex steroids, potentially via testicular influence, can modulate this lymphoid cell effect.
    • These findings extend previous observations from mouse models to rats.

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