Project description:Resident stem/progenitor cells in the lung are important for tissue homeostasis and repair. However, a progenitor population for alveolar type II (ATII) cells in adult human lungs have not been identified. Here we isolated alveolar epithelial progenitor cells (AEPCs) from adult human lungs. AEPCs showed mesenchymal stem cell (MSC)-like characteristics combined with ATII cell-phenotypes. AEPCs had the capability for self-renewal and the potential to generate ATII cells in vitro. Furthermore, cells expressing similar markers were present within alveolar walls in normal lungs and these cells were significantly increased in ATII cell hyperplasias. These results suggest that adult human lungs contain a progenitor population for ATII cells.
Project description:Single-nucleus RNA sequencing (snRNA-seq) was used to profile the transcriptome of 5,264 nuclei in mouse adult testis. This dataset includes two samples from two different individuals. This dataset is part of a larger evolutionary study of adult testis at the single-nucleus level (97,521 single-nuclei in total) across mammals including 10 representatives of the three main mammalian lineages: human, chimpanzee, bonobo, gorilla, gibbon, rhesus macaque, marmoset, mouse (placental mammals); grey short-tailed opossum (marsupials); and platypus (egg-laying monotremes). Corresponding data were generated for a bird (red junglefowl, the progenitor of domestic chicken), to be used as an evolutionary outgroup.
Project description:PURPOSE: To provide a detailed gene expression profile of the normal postnatal mouse cornea. METHODS: Serial analysis of gene expression (SAGE) was performed on postnatal day (PN)9 and adult mouse (6 week) total corneas. The expression of selected genes was analyzed by in situ hybridization. RESULTS: A total of 64,272 PN9 and 62,206 adult tags were sequenced. Mouse corneal transcriptomes are composed of at least 19,544 and 18,509 unique mRNAs, respectively. One third of the unique tags were expressed at both stages, whereas a third was identified exclusively in PN9 or adult corneas. Three hundred thirty-four PN9 and 339 adult tags were enriched more than fivefold over other published nonocular libraries. Abundant transcripts were associated with metabolic functions, redox activities, and barrier integrity. Three members of the Ly-6/uPAR family whose functions are unknown in the cornea constitute more than 1% of the total mRNA. Aquaporin 5, epithelial membrane protein and glutathione-S-transferase (GST) omega-1, and GST alpha-4 mRNAs were preferentially expressed in distinct corneal epithelial layers, providing new markers for stratification. More than 200 tags were differentially expressed, of which 25 mediate transcription. CONCLUSIONS: In addition to providing a detailed profile of expressed genes in the PN9 and mature mouse cornea, the present SAGE data demonstrate dynamic changes in gene expression after eye opening and provide new probes for exploring corneal epithelial cell stratification, development, and function and for exploring the intricate relationship between programmed and environmentally induced gene expression in the cornea. Keywords: other
Project description:Resident stem/progenitor cells in lungs are important for tissue homeostasis and repair. We isolated human lung progenitor cells and named alveolar epithelial progenitor cells (AEPCs)(Fujino N, et al. 2011. Lab Invest. 91:363). AEPCs have phenotypes of both alveolar epithelial type II (ATII) cells and mesenchymal stem cells. AEPCs had the potential to generate ATII-like cells in vitro. ATII-like cells derived from AEPCs expressed protein and mRNA of pulmonary surfactant, and displayed lamellar bodies containing the surfactants. However, it has not been evaluated whether global gene expression of the ATII-like cells from AEPCs was similar to that of mature ATII cells isolated from human lung tissues. This study demonstrated gene expression profiles of ATII-like cells from AEPCs. In addition, transcriptomes in AEPCs and mature ATII cells were deposited in the GEO website (GSE21095 and GSE29133, respectively). We isolated AEPCs from tissue samples obtained from patients who underwent lung resection at Department of Thoracic Surgery, Tohoku University Hospital. We induced differentiation of AEPCs to ATII-like cells on extracellular matrix with medium containing KGF, cAMP and IBMX, as previously described (Fujino N, et al. 2011. Lab Invest. 91:363). We profiled the gene expression in three different batches of the ATII-like cells. We extracted total RNA from the differentiated cells. This study was approved by the Ethics Committee at Tohoku University School of Medicine. All subjects gave informed consent.
Project description:Resident stem/progenitor cells in lungs are important for tissue homeostasis and repair. We isolated human lung progenitor cells and named alveolar epithelial progenitor cells (AEPCs)(Fujino N, et al. 2011. Lab Invest. 91:363). AEPCs have phenotypes of both alveolar epithelial type II (ATII) cells and mesenchymal stem cells. AEPCs had the potential to generate ATII-like cells in vitro. ATII-like cells derived from AEPCs expressed protein and mRNA of pulmonary surfactant, and displayed lamellar bodies containing the surfactants. However, it has not been evaluated whether global gene expression of the ATII-like cells from AEPCs was similar to that of mature ATII cells isolated from human lung tissues. This study demonstrated gene expression profiles of ATII-like cells from AEPCs. In addition, transcriptomes in AEPCs and mature ATII cells were deposited in the GEO website (GSE21095 and GSE29133, respectively).
Project description:SILAC based protein correlation profiling using size exclusion of protein complexes derived from Mus musculus tissues (Heart, Liver, Lung, Kidney, Skeletal Muscle, Thymus)
Project description:SILAC based protein correlation profiling using size exclusion of protein complexes derived from seven Mus musculus tissues (Heart, Brain, Liver, Lung, Kidney, Skeletal Muscle, Thymus)