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Proceedings of the National Academy of Sciences of the United States of America logoLink to Proceedings of the National Academy of Sciences of the United States of America
. 1980 Jul;77(7):4322–4325. doi: 10.1073/pnas.77.7.4322

Cellular and molecular basis of the increased splenic hemopoiesis in mice treated with bacterial cell wall components.

F G Staber, D Metcalf
PMCID: PMC349826  PMID: 6933484

Abstract

An analysis was made of the mechanisms responsible for the increased splenic hemopoiesis occurring in mice after the injection of the bacterial cell wall components lipid A and outer membrane lipoprotein. No evidence was obtained for the presence of functional lipid A receptors on hemopoietic precursor cells. Serum from lipid A-injected mice, on injection into normal mice, induced in the spleen an increased content of all hemopoietic progenitor cells. The magnitude of the response was dependent on the dose of lipid A used and the volume of serum transferred to the recipients. C3H/HeJ mice unresponsive to lipid A exhibited similar spleen changes when injected with active post-lipid A sera. Progenitor cells of all hemopoietic lineages, including multipotential hemopoietic stem cells, were involved in the response. The results suggest that a humoral factor mediates the lipid A-induced increase of splenic hemopoiesis.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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