Project description:Biomolecules preserved in dental pulp are increasingly being used to identify individuals in the context of forensics and archaeology. Despite the vast amount of research into host and pathogen DNA, the potential use of physiologically informative proteins preserved in dental pulp has rarely been studied. Here, we hypothesized that pregnancy specific proteins circulating in the blood could be identified from the dental pulp of postpartum individuals and this was investigated using 8 human third molars extracted from 4 postpartum and 3 control individuals during clinical treatment. A total of 885 proteins were identified from these 8 dental pulp samples using liquid chromatography coupled tandem mass spectrometry, whose gene ontology compositions were similar to previous studies. However, despite our hypothesis, pregnancy specific proteins were not identified from the dental pulp of postpartum individuals (n = 5, 4–12 months postpartum). Although the dental pulp proteomes obtained from three individuals postpartum ≤6 months were distinct from those of other individuals by principal component analysis, their driving proteins were less evident. Although our hypothesis was not supported, sample collection, protein extraction, and mass spectrometry analysis could be improved to explore the forensic application of detecting pregnancy specific proteins in dental pulp.
Project description:Dental pulp was extracted from mandibular first molars of Osterix-Cre:Tgfbr2wt/wt and Osterix-Cre:Tgfbr2f/f pups on postnatal day 7. 1ng-limiting cell RNA Sequence analysis was performed on 4 samples from each genotype.
Project description:We present a collection of single-cell transcriptomic profiles of 6,810 pulpal cells isolated from a sound human maxillary third molars and carious teeth at different stages. We showed that the presence of deep, but not enamel caries, altered the immune cell compositions of the dental pulp. Differential expression analysis further revealed that the pro-inflammatory, anti-inflammatory and mineralization-related genes were upregulated in immune and stromal cells in deep dental caries. Cell-cell interaction prediction showed potential interactions between immune and stromal cells during homeostasis, and enhanced interactions between different cell types with macrophage during deep dental caries. Taken together, our study serves as a comprehensive survey of human pulpal cell heterogeneity, as well as provides novel molecular insights into dental pulps in health and disease.
Project description:Objectives: Dental pulp stem cells are crucial in immune response regulation. However, sub-clusters of these cells involved in deep caries progression remain unidentified. This study explores the role of Intercellular adhesion molecule 1-positive dental pulp stem cells (ICAM1+DPSCs) within the immune microenvironment of dental pulp tissue affected by deep caries, aiming to establish a theoretical foundation and novel strategies for its prevention and treatment.Methods: Use flow cytometry to sort ICAM1+ DPSCs and ICAM1- DPSCs for RNA-seq.
Project description:Dental pulp plays a crucial role for dental health, and dental pulp aging influences their regenerative and reparative function. However, the underlying molecular mechanisms of dental pulp aging are not exhaustively understood, and thereby an in-depth and complete understanding of the aged dental pulp is of foremost importance. This study aimed to explore the heterogeneity of young and aged dental pulp tissue using single-cell RNA sequencing (scRNA-seq).
Project description:Dental pulp cells obtained from several donors proliferated actively in a serum-free medium STK2. The growth rate of dental pulp cells from most donors was higher in the serum-free medium than that in a medium containing 10% serum. DNA microarray analyses showed that gene expression profile of dental pulp cells grown in the serum-free medium was similar to that of cells grown in a medium containing 10% serum. However, several genes related to cell proliferation were up-regulated in dental pulp cells grown in the serum-free medium.
Project description:Transcriptional response of rat dental pulp cells (DPCs) cultured with SAHA at early and late mineralisation time points Transcript profiling of DPC identified several novel genes expression induced and supressed by HDACi at 24 hrs and 14 days under mineralising conditions. SAHA induces several members of the MMP family of endopepsidases (TIMP-1, MMP-9, MMP-13) and other members of the endochondral ossification pathway at 24 h. 8 experiemental parameters were analysed, each carried out in quadruplicate