title: The presence of a side population and its marker ABCG2 in human deciduous dental pulp cells.
abstract: Stem cells have been identified using the DNA-binding dye Hoechst 33342 and flow cytometry (FCM) in various tissues known as the side population (SP). The present study shows, for the first time, the presence of side population cells in human deciduous dental pulp cells (DPCs). Flow cytometric identification revealed that 2% of human deciduous DPCs were SP cells and that this SP profile disappeared in the presence of verapamil. The SP marker ABCG2 protein was localized to DPCs in the cell membrane by immunofluorescence staining, and flow cytometric analysis demonstrated that 3.6% of DPCs were ABCG2-positive. Furthermore, quantitative real-time PCR proved that ABCG2 mRNA expression in DPCs isolated from human exfoliated deciduous teeth was higher than in DPCs from permanent teeth. Our findings demonstrate that DPCs from human exfoliated deciduous teeth contain a higher proportion of the SP phenotype than permanent teeth and that they may constitute a stem cell population.
authors: Department of Oral Biology, Guanghua School of Stomatology, Sun Yat-sen University, 56 Ling Yuan Xi Road, Guangzhou 510055, PR China.
authors: Jinming
authors: J
authors: Wang
authors: Xi
authors: X
authors: Wei
authors: Junqi
authors: J
authors: Ling
authors: Yijun
authors: Y
authors: Huang
authors: Yongbiao
authors: Y
authors: Huo
authors: Yuxi
authors: Y
authors: Zhou
mesh_terms: D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics / Q000378:metabolism*; D015415:Biomarkers / Q000378:metabolism; D002478:Cells, Cultured; D003782:Dental Pulp / Q000166:cytology* / Q000378:metabolism; D006801:Humans; D009363:Neoplasm Proteins / Q000235:genetics / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D013234:Stem Cells / Q000166:cytology* / Q000378:metabolism
chemical_list: C116614:ABCG2 protein, human; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; D018528:ATP-Binding Cassette Transporters; D015415:Biomarkers; D009363:Neoplasm Proteins