title: Increased generation of dendritic cells from myeloid progenitors in autoimmune-prone nonobese diabetic mice.
abstract: Aberrant dendritic cell (DC) development and function may contribute to autoimmune disease susceptibility. To address this hypothesis at the level of myeloid lineage-derived DC we compared the development of DC from bone marrow progenitors in vitro and DC populations in vivo in autoimmune diabetes-prone nonobese diabetic (NOD) mice, recombinant congenic nonobese diabetes-resistant (NOR) mice, and unrelated BALB/c and C57BL/6 (BL/6) mice. In GM-CSF/IL-4-supplemented bone marrow cultures, DC developed in significantly greater numbers from NOD than from NOR, BALB/c, and BL/6 mice. Likewise, DC developed in greater numbers from sorted (lineage(-)IL-7Ralpha(-)SCA-1(-)c-kit(+)) NOD myeloid progenitors in either GM-CSF/IL-4 or GM-CSF/stem cell factor (SCF)/TNF-alpha. [(3)H]TdR incorporation indicated that the increased generation of NOD DC was due to higher levels of myeloid progenitor proliferation. Generation of DC with the early-acting hematopoietic growth factor, flt3 ligand, revealed that while the increased DC-generative capacity of myeloid-committed progenitors was restricted to NOD cells, early lineage-uncommitted progenitors from both NOD and NOR had increased DC-generative capacity relative to BALB/c and BL/6. Consistent with these findings, NOD and NOR mice had increased numbers of DC in blood and thymus and NOD had an increased proportion of the putative myeloid DC (CD11c(+)CD11b(+)) subset within spleen. These findings demonstrate that diabetes-prone NOD mice exhibit a myeloid lineage-specific increase in DC generative capacity relative to diabetes-resistant recombinant congenic NOR mice. We propose that an imbalance favoring development of DC from myeloid-committed progenitors predisposes to autoimmune disease in NOD mice.
authors: Autoimmunity and Transplantation Division, Walter and Eliza Hall Institute of Medical Research, Royal Melbourne Hospital, Parkville, 3050 Victoria, Australia.
authors: Raymond J
authors: RJ
authors: Steptoe
authors: Janine M
authors: JM
authors: Ritchie
authors: Leonard C
authors: LC
authors: Harrison
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000096:biosynthesis; D051940:B7-2 Antigen; D001854:Bone Marrow Cells / Q000166:cytology / Q000276:immunology / Q000378:metabolism; D015815:Cell Adhesion Molecules / Q000096:biosynthesis; D002454:Cell Differentiation / Q000276:immunology; D002455:Cell Division / Q000276:immunology; D019070:Cell Lineage / Q000276:immunology; D002478:Cells, Cultured; D017077:Culture Media, Conditioned; D003713:Dendritic Cells / Q000166:cytology* / Q000276:immunology / Q000378:metabolism; D003922:Diabetes Mellitus, Type 1 / Q000235:genetics / Q000276:immunology* / Q000473:pathology; D005260:Female; D020022:Genetic Predisposition to Disease; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000494:pharmacology; D016167:Integrin alphaXbeta2 / Q000096:biosynthesis / Q000097:blood; D015847:Interleukin-4 / Q000494:pharmacology; D008024:Ligands; D016177:Macrophage-1 Antigen / Q000096:biosynthesis / Q000097:blood; D008562:Membrane Glycoproteins / Q000096:biosynthesis; D008565:Membrane Proteins / Q000494:pharmacology; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D016688:Mice, Inbred NOD; D008817:Mice, Mutant Strains; D016513:Mice, SCID; D023461:Myeloid Progenitor Cells / Q000166:cytology* / Q000276:immunology / Q000378:metabolism; D013045:Species Specificity; D013154:Spleen / Q000166:cytology / Q000276:immunology; D013950:Thymus Gland / Q000166:cytology / Q000276:immunology
chemical_list: D015703:Antigens, CD; D051940:B7-2 Antigen; C497965:Cd86 protein, mouse; D015815:Cell Adhesion Molecules; D017077:Culture Media, Conditioned; D016167:Integrin alphaXbeta2; D008024:Ligands; D016177:Macrophage-1 Antigen; D008562:Membrane Glycoproteins; D008565:Membrane Proteins; C084881:flt3 ligand protein; D015847:Interleukin-4; D016178:Granulocyte-Macrophage Colony-Stimulating Factor