Project description:Mus musculus embryonic submandibular salivary glands from embryonic day 12.5 embryos were laser microdissected to isolate epithelial cells from regions adjacent to forming clefts or from the peripheral end bud region. The isolated region-specific samples were then subjected to T7-SAGE transcriptome analysis. Toluidine blue-stained cryostat sections of embryonic day 12.5 submandibular salivary glands were used for laser microdissection using an LMD system (Leica) with a pulsed UV laser on an upright automated microscope. A total of approximately 500 cells from a region immediately adjacent to a forming cleft or from a peripheral end bud region were excised by the laser and transferred to caps of 0.5 ml PCR tubes. SAGE libraries were constructed from the microdissected cleft and bud epithelia cells. SAGE tags were identified using the National Center for Biotechnology Information (NCBI) tag map set for UniGene.
Project description:Mus musculus embryonic submandibular salivary glands from embryonic day 12.5 embryos were laser microdissected to isolate epithelial cells from regions adjacent to forming clefts or from the peripheral end bud region. The isolated region-specific samples were then subjected to T7-SAGE transcriptome analysis.
Project description:Our single-cell and bulk transcriptome analyses revealed striking molecular heterogeneity in the mesenchymal cells of embryonic submandibular and parotid salivary glands during bud initiation, including distinct mesodermal and neural crest-derived molecular signatures that foreshadow later functions.
Project description:Our single-cell and bulk transcriptome analyses revealed striking molecular heterogeneity in the mesenchymal cells of embryonic submandibular and parotid salivary glands during bud initiation, including distinct mesodermal and neural crest-derived molecular signatures that foreshadow later functions.
Project description:Comparisons between the salivary glands upon the RNAi of sage gene vs. the control. Keywords = Drosophila, ecdysone, network, genomic, microarray, organogenesis, EcR, midgut, central nervous system, salivary gland, epidermis, imaginal disc, development Keywords: other
Project description:Comparisons between the salivary glands upon the RNAi of sage gene vs. the control. Keywords = Drosophila, ecdysone, network, genomic, microarray, organogenesis, EcR, midgut, central nervous system, salivary gland, epidermis, imaginal disc, development
Project description:Salivary glands are essential structures that secrete saliva to the oral cavity and maintain oral health. Development of salivary glands in mice and humans is controlled by mesenchymally expressed fibroblast growth factor-10 (FGF10). Using single cell RNA-seq atlas of the salivary gland and a tamoxifen inducible Fgf10CreERT2:R26-tdTomato mouse we show that FGF10pos cells are exclusively mesenchymal until postnatal day 5 (P5), but after P7, there is a switch in expression and only epithelial FGF10pos cells are observed after P15. Further RNAseq analysis of sorted mesenchymal and epithelial FGF10pos cells shows that the epithelial FGF10pos populations express the hallmark of ancient ionocyte signature Foxi1, Foxi2, Ascl3 and the cystic fibrosis transmembrane conductance regulator (Cftr). We propose that epithelial FGF10pos cells are specialized salivary gland ionocytes that are important for the ionic modification of saliva. In addition, they maintain FGF10-dependent glands homeostasis via communication with FGFR2b-expressing epithelial progenitor and myoepithelial cells
Project description:Branching morphogenesis is a basic way of the kinds of complex organs’ development including lungs, kidneys, thyroid glands and salivary glands.1 Submandibular gland (SMG) development is a classic model to reveal the mechanism of branching morphogenesis and it also provides novel approaches to tissue engineering for salivary glands regenerating or for creating artificial salivary glands.And for murine salivary glands’ development, two main components are formed, epithelial and mesenchyme. The elongation and branch of epithelial make up the main process of its development which supported by mesenchymal secretion.This processes are controlled by many factors like growth factors, hormones and miRNAs etc.567 All these factors play different roles in the branching morphogenesis of mouse salivary glands. Transforming growth factor β1 (TGF-β1) is a pivotal factor of them and it has a huge impact on SMG development through its action on the mesenchyme. We used microarrays to detail the global programme of gene expression during the branching morphogenesis and identified distinct classes of up/down-regulated genes during this process.
Project description:The development of branched organs like mammary and salivary glands is regulated by tissue interactions between the epithelial and mesenchymal tissues. Mammary gland consists of a branched epithelial ductal network embedded in a mammary specific mesenchyme. In order to uncover the molecular mechanisms regulating embryonic mammary gland development, we compared the transcriptomes of mesenchymes from different development stages and tissues by RNA-sequencing
Project description:Salivary glands produce saliva and play essential roles in digestion and oral health. Pluripotent stem cell-derived (PSC) organoids provide a powerful platform for studying salivary gland development and developing new regenerative therapy. The previous protocol of PSC-derived salivary gland organoids required complicated manufacturing processes, which hampered the organoids for basic research and clinical application.Here, by mimicking the regulatory mechanism of developing salivary glands, we reported the differentiation of induced embryonic salivary glands (iE-SGs) from mouse embryonic stem cells by step-wise treatment of retinoic acid and FGF10. We showed that the iE-SGs recapitulated early morphogenetic events, including the thickening and invagination of the salivary gland placode, and then formed initial buds. The iE-SGs also differentiated into developing ducts structures and could develop to striated and excretory ducts when transplanted in vivo. RNA- seq revealed that iE-SGs had gene expression profiles similar to mouse embryonic SMGs. Thus, our study provided an easy and safe method to generate iE-SGs and offered possibilities for studying events during salivary gland morphogenesis in vitro