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Origins and Properties of Dental, Thymic, and Bone Marrow Mesenchymal Cells and Their Stem Cells
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Origins and Properties of Dental, Thymic, and Bone Marrow Mesenchymal Cells and Their Stem Cells
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Journal Article
Origins and Properties of Dental, Thymic, and Bone Marrow Mesenchymal Cells and Their Stem Cells
2012
Overview
Mesenchymal cells arise from the neural crest (NC) or mesoderm. However, it is difficult to distinguish NC-derived cells from mesoderm-derived cells. Using double-transgenic mouse systems encoding P0-Cre, Wnt1-Cre, Mesp1-Cre, and Rosa26EYFP, which enabled us to trace NC-derived or mesoderm-derived cells as YFP-expressing cells, we demonstrated for the first time that both NC-derived (P0- or Wnt1-labeled) and mesoderm-derived (Mesp1-labeled) cells contribute to the development of dental, thymic, and bone marrow (BM) mesenchyme from the fetal stage to the adult stage. Irrespective of the tissues involved, NC-derived and mesoderm-derived cells contributed mainly to perivascular cells and endothelial cells, respectively. Dental and thymic mesenchyme were composed of either NC-derived or mesoderm-derived cells, whereas half of the BM mesenchyme was composed of cells that were not derived from the NC or mesoderm. However, a colony-forming unit-fibroblast (CFU-F) assay indicated that CFU-Fs in the dental pulp, thymus, and BM were composed of NC-derived and mesoderm-derived cells. Secondary CFU-F assays were used to estimate the self-renewal potential, which showed that CFU-Fs in the teeth, thymus, and BM were entirely NC-derived cells, entirely mesoderm-derived cells, and mostly NC-derived cells, respectively. Colony formation was inhibited drastically by the addition of anti-platelet-derived growth factor receptor-β antibody, regardless of the tissue and its origin. Furthermore, dental mesenchyme expressed genes encoding critical hematopoietic factors, such as interleukin-7, stem cell factor, and cysteine-X-cysteine (CXC) chemokine ligand 12, which supports the differentiation of B lymphocytes and osteoclasts. Therefore, the mesenchymal stem cells found in these tissues had different origins, but similar properties in each organ.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Analysis
/ Animals
/ B cells
/ B-Lymphocytes - drug effects
/ Bacterial Proteins - metabolism
/ Biology
/ Bone Marrow Cells - cytology
/ Bone Marrow Cells - drug effects
/ Bone Marrow Cells - metabolism
/ Cell Differentiation - drug effects
/ Coding
/ Colonies
/ Cysteine
/ Fetuses
/ Luminescent Proteins - metabolism
/ Lymphopoiesis - drug effects
/ Medicine
/ Mesenchymal Stromal Cells - cytology
/ Mesenchymal Stromal Cells - drug effects
/ Mesenchymal Stromal Cells - metabolism
/ Mesoderm
/ Mice
/ Origins
/ Platelet-derived growth factor
/ Receptors, Platelet-Derived Growth Factor - antagonists & inhibitors
/ Receptors, Platelet-Derived Growth Factor - metabolism
/ Rodents
/ Studies
/ Teeth
/ Thymus
/ Tissues
