Abstract:
:Intermediate progenitor populations play a crucial role in the regional specification and differentiation of the cranial neural crest. On the basis of global gene expression profiles, gene cohort expression levels, and epigenetic modifications, we have defined key factors involved in the differentiation of dental follicle (DF) intermediate progenitors into periodontal lineages, including alveolar bone (AB) osteoblasts, cementoblasts, and periodontal ligament (PDL) cells. When comparing differentially expressed genes, PDL cells most closely resembled DF progenitors, followed by AB osteoblasts and cementoblasts as the most distant population. According to gene ontology analyses, extracellular matrix-adhesion proteins were substantially increased in PDL cells, osteogenesis factors were elevated in AB osteoblasts, and gene expression levels were lower in cementoblasts, especially in the cytokine group. Unique signature proteins included interleukin 6, paired-like homeodomain transcription factor 2, thrombospondin 2, and glial cell line-derived neurotrophic factor for DF progenitors; asporin and prostaglandin-H2 D-isomerase for AB osteoblasts; and keratin 18, Netrin 4, Jagged 1, and Dickkopf1 for cementoblasts, as verified by western blot analysis. Secreted frizzled-related protein 1 was preferentially expressed in PDL cells, whereas matrix Gla-protein, bone sialoprotein, and insulin-like growth factor binding protein 5 were higher in AB osteoblasts than in cementoblasts. On an epigenetic level, DF progenitors featured high levels of the euchromatin marker H3K4me3, whereas PDL cells, AB osteoblasts, and cementoblasts contained high levels of the transcriptional repressor H3K9me3. Together, our data indicate that in addition to changes in signature gene expression, unique shifts in gene cohort expression levels, epigenetic modifications, and changes in cell morphology contribute to the individuation of tissue populations from a common neural-crest-derived ancestor.
journal_name
Stem Cells Devjournal_title
Stem cells and developmentauthors
Dangaria SJ,Ito Y,Luan X,Diekwisch TGdoi
10.1089/scd.2010.0180subject
Has Abstractpub_date
2011-01-01 00:00:00pages
39-52issue
1eissn
1547-3287issn
1557-8534journal_volume
20pub_type
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journal_title:Stem cells and development
pub_type: 杂志文章
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