Summary
Morphological changes in spleen and lymph nodes of C57B1 mice induced by the cytotoxic agent cyclophosphamide and the polysaccharide levan, separately and in combination were studied. In the spleen, an early decrease (phase 1) and a late increase (phase 2) in weight were found to result from all drug administrations. The hypocellularity of phase 1 was due to a depletion in the white pulp affecting mainly the B-region. Splenic weight decrease was parallel to B-cell depletion and most marked in animals exposed to cyclophosphamide with levan. The splenomegaly observed during phase 2 with all treatments was due to extramedullary hematopoiesis in the red pulp. In the lymph nodes, administration of cyclophosphamide and levan produced opposite effects on the B-cell region: cyclophosphamide eliminated the germinal centers for 8 days, but levan seemed to enhance B-cell activity. In animals given both cyclophosphamide and levan, inhibition of B-cell activity began earlier than with cyclophosphamide alone. Levan does not antagonize the suppressive effect of cyclophosphamide on the B-cell component at the early phase when the drugs are given together.
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Siegal, A., Kopel, S. & Leibovici, J. Histological changes in spleen and lymph nodes of mice administered cyclophosphamide and levan. Cell Tissue Res. 245, 183–188 (1986). https://doi.org/10.1007/BF00218099
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DOI: https://doi.org/10.1007/BF00218099