PMID: 15383563Sep 24, 2004Paper

Bone marrow precursors of nonobese diabetic mice develop into defective macrophage-like dendritic cells in vitro

The Journal of Immunology : Official Journal of the American Association of Immunologists
Tatjana NikolicPieter J M Leenen

Abstract

The NOD mouse spontaneously develops autoimmune diabetes. Dendritic cells (DC) play a crucial role in the autoimmune response. Previous studies have reported a defective DC generation in vitro from the NOD mouse bone marrow (BM), but a deviated development of myeloid precursors into non-DC in response to GM-CSF was not considered. In this study, we demonstrate several abnormalities during myeloid differentiation of NOD BM precursors using GM-CSF in vitro. 1) We found reduced proliferation and increased cell death in NOD cultures, which explain the previously reported low yield of DC progeny in NOD. Cell yield in NOR cultures was normal. 2) In a detailed analysis GM-CSF-stimulated cultures, we observed in both NOD and NOR mice an increased frequency of macrophages, identified as CD11c(+)/MHCII(-) cells with typical macrophage morphology, phenotype, and acid phosphatase activity. This points to a preferential maturation of BM precursors into macrophages in mice with the NOD background. 3) The few CD11c(+)/MHCII(high) cells that we obtained from NOD and NOR cultures, which resembled prototypic mature DC, appeared to be defective in stimulating allogeneic T cells. These DC had also strong acid phosphatase activity and elevated expr...Continue Reading

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Citations

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