Project description:To investigate whether the bladder assembloids recapitulate cell compositions, in addition to the gene expression patterns of each cell type in the adult bladder, we performed single-cell RNA-seq of bladder assembloids and mouse adult bladders, and compared the transcriptional profiles between them at the single-cell level.
Project description:Objectives: Much of the information to date in terms of subtypes and function of bladder urothelial cells were derived from anatomical location or by the expression of a small number of marker genes. To have a comprehensive map of the cellular anatomy of bladder urothelial cells, we performed single-cell RNA-sequencing to thoroughly characterize mouse bladder urothelium. Materials and methods: A total of 18,917 single cells from mouse bladder urothelium was analyzed by unbiased single-cell RNA sequencing. The expression of the novel cell marker was confirmed by immunofluorescence using urinary tract infections models. Results: Unsupervised clustering analysis identified 8 transcriptionally distinct cell subpopulations from mouse bladder urothelial cells. We discovered a novel type of bladder urothelial cells marked by Plxna4 that may be involved with host response and wound healing. We also found a group of basal-like cells labeled by ASPM that could be the progenitor cells of adult bladder urothelium. ASPM+ urothelial cells are significantly increased after injury by UPEC. In addition, specific transcription factors were found to be associated with urothelial cell differentiation. At the last, a number of interstitial cystitis/bladder pain syndrome-regulating genes were found differentially expressed among different urothelial cell subpopulations. Conclusions: Our study provides a comprehensive characterization of bladder urothelial cells, which is fundamental to understanding the biology of bladder urothelium and associated bladder disease.
Project description:Single cell RNA-seq was performed on healthy mouse skin fibroblasts. This data along with single cell transcriptomics datasets of fibroblasts from other healthy tissues was used to construct a steady state mouse fibroblast atlas.
Project description:A comprehensive cellular anatomy of normal human bladder is vital to address the cellular origins of benign bladder disease and bladder cancer. The physiological function and pathological changes of bladder are associated with its cell type. To investigate the classification and underlying function of bladder cells, we conducted single-cell RNA sequencing (scRNA seq) of 12,423 cells from human bladder and 12,884 cells from mouse bladder. Here, we show a single-cell transcriptomic map of the human and mouse bladders, including 16 clusters of human bladder cells and 15 clusters of mouse bladder cells. Homology and heterogeneity of human and mouse were compared and analyzed by our study, and indicated that there were both conservative and heterogeneous aspects of human and mouse evolution. We also discovered two novel types of human bladder cells; one type is ADRA2A+ and HRH2+ interstitial cells which may be associated with nerve conduction and allergic reactions; the other type is TNNT1+ epithelial cells that may be different from other epithelial cells in biological function. Collectively, this analysis provides a resource for the discovery of novel cell type, specific transcription factors, signaling receptors, and genes dataset that will help us to study the relationship between cell types and diseases.