Similar Datasets
Project description:Gastric ulcer, which affect many of patients and is deeply related with gastric cancer, is caused by chronic gastric acid stimulation. Stomach fundus, the main body of stomach, is a major source of gastric acid and peptidase for food digestion. Recapturing the main body of stomach requires mainly 3 functionally differentiated cells; parietal (oxyntic) cells, chief (zymogenic) cells, and surface mucous foveolar (pit) cells. We have previously shown the induction of stomach tissue with functional secreting activities by directed differentiation of mouse embryonic stem cells (ES cells) to stomach primordium with both gut epithelium and splanchnic mesoderm. However, generating human stomach with fundus and such functions has been elucidated and a long-desired goal. Here, we describe the method for establishing human embryonic stem cell-derived stomach organoids with fundus gland structure. Along with mouse stomach development and de novo stomach generation from mouse ES cells in vitro, we observed gut-like structure formation from human embryonic stem cells by induction of both endoderm and mesoderm. These human embryonic gut could differentiate into stomach primordium by growth factor stimulation as well as stomach development, and form stomach tissue in three-dimensional organoid culture. Furthermore, these stomach organoids contain fundus-like gland with parietal cells and chief cells, some of secreting activities, and is transcriptionally close to human stomach. Human functional stomach derived from embryonic stem cells represent powerful tools for analying human stomach development, and gastric ulcer related disease including gastric tumorgenesis.
2017-08-31 | GSE79673 | GEO
Project description:Metaplastic breast carcinoma (MpBC) typically consists of carcinoma of no special type (NST) with various metaplastic components. The intracase transcriptomic alterations between metaplastic components and paired NST components, which are critical for understanding the pathogenesis underlying the metaplastic processes, remain unclear. Herein, 59 NST components and paired metaplastic components (spindle sarcomatous [SPS], matrix-producing, rhabdomyoid [RHA], and squamous carcinomatous [SQC] components) were microdissected from specimens obtained from 27 patients with MpBC for gene expression profiling. Hierarchical clustering and principal component analysis revealed a heterogeneous gene expression profile (GEP) corresponding to the NST components, but the GEP of metaplastic components exhibited subtype dependence. Compared with the paired NST components, the SPS components demonstrated the upregulation of genes related to stem cells and epithelial–mesenchymal transition, and displayed enrichment in claudin-low and macrophage signatures. Despite certain overlap in the enriched functions and signatures between the RHA and SPS components, the specific differentially expressed genes differed. We observed the RHA-specific upregulation of genes associated with vascular endothelial growth factor signaling. The chondroid matrix-producing components demonstrated the upregulation of hypoxia-related genes and the downregulation of the immune-related MHC2 signature and the TIGIT gene. In the SQC components, TGF-β and genes associated with cell adhesion were upregulated. The differentially expressed genes among metaplastic components in the 22 MpBC cases with one or predominantly one metaplastic component clustered paired NST samples into clusters with correlation with their associated metaplastic types. These genes could be used to separate the 31 metaplastic components according to respective metaplastic types with an accuracy of 74.2%, suggesting that intrinsic signatures of NST may determine paired metaplastic type. The EMT activity and stem cell traits in the NST components were correlated with specimens displaying lymph node metastasis. In summary, we presented the distinct transcriptomic alterations underlying metaplasia into specific metaplastic components in MpBCs.
2023-01-31 | GSE212245 | GEO
Project description:SNP6 profiling of metaplastic breast carcinoma Metaplastic breast carcinoma (MBC) is a rare and aggressive histologic type of breast cancer, preferentially displaying a triple-negative phenotype (i.e. lacking estrogen receptor, progesterone receptor and HER2 expression). We sought to define the transcriptomic heterogeneity of MBCs on the basis of current gene expression microarray-based classifiers and to determine whether MBCs display gene copy number profiles consistent with those of BRCA1-associated breast cancers.
2014-10-31 | E-GEOD-57548 | biostudies-arrayexpress
Project description:Adult stem cells represent an invaluable resource that can be harnessed for therapeutic tissue repair. Gut stem cells are accessible by biopsy and grow indefinitely in culture as organoids or cell lines. Human fetal gut can generate rare insulin-secreting cells. However, the short lifespan of gut cells, amounting to only days in situ, calls into question the feasibility of producing stable and durable gut insulin-secreting cells as a potential engraftable therapeutic. Here, we show that cultured human stomach stem cells can be directed to generate pancreatic islet-like organoids containing long-lived gastric insulin-secreting (GINS) cells that resemble pancreatic b-cells in molecular hallmarks and function. After sequential activation of the inducing factors NGN3 and PDX1-MAFA, gastric stem cells passed through a SOX4High endocrine and a GalaninHigh precursor state before adopting the b-cell fate, at efficiencies exceeding 80%. GINS cells acquired glucose-stimulated insulin secretion 10 days post differentiation and restored glucose homeostasis for over 100 days in diabetic mice after transplantation. This study establishes a promising approach to procuring autologous human insulin producers for diabetes treatment, and further expands the already considerable therapeutic opportunities for gut stem cells.
2023-01-10 | GSE205766 | GEO
Project description:SNP6 profiling of metaplastic breast carcinoma
2014-10-31 | GSE57548 | GEO
Project description:The gastroesophageal squamocolumnar junction (GE-SCJ) is a critical tissue interface between the esophagus and stomach, with significant relevance in the pathophysiology of gastrointestinal diseases. Despite this, the molecular mechanisms underlying GE-SCJ development remain unclear. Using single-cell transcriptomics, organoids, and spatial analysis, we examine the cellular heterogeneity and spatiotemporal dynamics of GE-SCJ development from embryonic to adult mice. We identify distinct transcriptional states and signaling pathways in the epithelial and mesenchymal compartments of the esophagus and stomach during development. Fibroblast-epithelial interactions are mediated by various signaling pathways, including WNT, BMP, TGF-β, FGF, EGF, and PDGF. Our results suggest that fibroblasts predominantly send FGF and TGF-β signals to the epithelia, while epithelial cells mainly send PDGF and EGF signals to fibroblasts. We observe differences in the ligands and receptors involved in cell-cell communication between the esophagus and stomach. Our findings provide insights into the molecular mechanisms underlying GE-SCJ development and fibroblast-epithelial crosstalk involved, paving the way to elucidate mechanisms during adaptive metaplasia development and carcinogenesis.
2024-03-12 | GSE181409 | GEO
Project description:Breast cancer cells and two metaplastic breast cancer cell lines were used: a widely available, HS578T, and a novel line isolated from a metaplastic breast cancer tumor, BAS. Doxorubicin and paclitaxel resistant derivatives of these metaplastic lines were generated and miR profiling performed.
2023-01-29 | GSE144445 | GEO
Project description:Actinomyces oralis strain:stomach | isolate:stomach Genome sequencing
| PRJNA708187 | ENA
Project description:Expression profiling of metaplastic carcinoma of the breast
2014-10-31 | GSE57544 | GEO
Project description:Two metaplastic breast cancer cell lines were used: a widely available, HS578T, and a novel line isolated from a metaplastic breast cancer tumor, BAS. Doxorubicin and paclitaxel resistant derivatives of these lines were generated and transcriptome profiling performed.
2023-01-23 | GSE144113 | GEO