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[Bone marrow stromal damage mediated by immune response activity]

J Vojinović, B Kamenov, S Najman

    Srpski Arhiv Za Celokupno Lekarstvo
    |January 1, 1994
    PubMed

    Insights

    Activated immune responses can damage bone marrow microenvironment, impairing hematopoiesis. This leads to anemia and altered blood cell production in both experimental models and patients with chronic immune activation.

    Area of Science:

    • Immunology
    • Hematology
    • Cell Biology

    Context:

    • Investigates the impact of immune system activation on blood cell formation (hematopoiesis).
    • Utilizes an experimental model of Bacillus Calmette-Guérin (BCG) immunized mice and human patients with chronic immune activation (infections, autoimmunity, malignancy).

    Purpose:

    • To determine how an activated immune response influences hematopoiesis in vitro.
    • To correlate changes in bone marrow cultures and nitroblue tetrazolium (NBT) reduction with anemia and immune status.

    Summary:

    • Activated macrophages, indicated by increased NBT reduction, contribute to bone marrow stroma damage.
    • Long-term bone marrow cultures revealed decreased hematopoietic cells, increased fibroblasts, and fat cell loss.
    • These changes correlated with anemia, leucocytosis, and stimulated myelopoiesis in peripheral blood.

    Impact:

    • Demonstrates that immune activation can damage the bone marrow microenvironment, altering hematopoiesis.
    • Highlights the role of macrophage activation in bone marrow damage and associated hematological abnormalities.
    • Suggests that agents altering bone marrow extracellular matrix and cellularity can lead to microenvironmental damage and modified hematopoiesis.

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