Abstract:
:The influence upon different cellular and humoral parameters of hemopoiesis of three structurally unrelated, highly purified bacterial cell-wall components (BCWC) was investigated. The spleens of C57BL/6 mice assayed 6 days after the injection of either lipid A or outer-membrane lipoportein, but not murein, showed a marked increase in granulocyte-macrophage, eosinophil, and megakaryocyte progenitor cell levels. The number of pluripotent hemopoietic stem cells (CFU-S) also increased in the spleens of mice treated with either lipid A or lipoprotein. Similar results were obtained following the injection of lipoprotein or lipid A into CBA or C57BL/6.nu mice. Genetically anemic Wf/Wf mice were found to have spontaneously elevated numbers of splenic progenitor cells, which increased further after the injection of lipid A. The proportions of the different splenic progenitor cell types were similar in both untreated and lipid A treated Wf/Wf mice, and in normal littermate controls. When tested in vitro, unfractionated or partially purified post-lipid A serum was found to stimulate the growth of granulocyte-macrophage progenitor cells (GM-CFC), but no detectable stimulation of eosinohphil, megakryocyte, or erythroid progenitor cells was observed. The data suggest that the rise in splenic levels of the different progenitor cells is not mediated by the corresponding types of CSF, but more likely by proliferation and differentiation of CFU-S.
journal_name
J Cell Physioljournal_title
Journal of cellular physiologyauthors
Staber FG,Johnson GRdoi
10.1002/jcp.1041050116subject
Has Abstractpub_date
1980-10-01 00:00:00pages
143-52issue
1eissn
0021-9541issn
1097-4652journal_volume
105pub_type
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