Spermatogonial stem cells (SSCs) provide foundation for spermatogenesis by undergoing continuous self-renewal division. Previous studies have reported conflicting results on the role of the pituitary gland activity in SSC self-renewal. In this study, we analyzed the role of hormonal regulation of SSCs using Lhcgr (luteinizing hormone/choriogonadotropin receptor) knockout mice. Analysis of gene expression profiles showed that testes of Lhcgr-deficient mice exhibit significantly enhanced Wnt5a expression in Sertoli cells.
The Luteinizing Hormone-Testosterone Pathway Regulates Mouse Spermatogonial Stem Cell Self-Renewal by Suppressing WNT5A Expression in Sertoli Cells.
Sex, Specimen part
View SamplesCommon myeloid progenitor cells from murine bone marrow were sorted according to ROS content using FACS with H2-DCFDA staining.
Intracellular reactive oxygen species mark and influence the megakaryocyte-erythrocyte progenitor fate of common myeloid progenitors.
Specimen part
View SamplesWT vs. Spp1-/- MPPs showed distict patterns in tgene transcription profiles when analyzed with single cell sequencing Overall design: MPPs from mice treated with thioglycollate were FACS-sorted, and gene expression profiles were compared between WT vs. Spp1-/- cells.
Skewing of the population balance of lymphoid and myeloid cells by secreted and intracellular osteopontin.
Subject
View SamplesSpermatogonial stem cells (SSCs) have pluripotent potential. However, frequency of pluripotent cell derivation is low and the mechanism of culture-induced reprogramming remains unknown. Here we report that epigenetic instability of germline stem (GS) cells, cultured SSCs, induces pluripotent cell derivation. GS cells undergo DNA demethylation in H19 differentially methylated region under low-density culture. When H19 demethylation was induced by Dnmt1 depletion, they converted into embryonic stem (ES)-like cells. Dnmt1 depletion downregulated Dmrt1 expression, whose depletion also induced pluripotency. Functional screening of Dmrt1 target gene revealed that Dmrt1 depletion upregulates Sox2, the key molecule responsible for generating induced pluripotent stem cells. Although Sox2 transfection upregulated Oct4 and produced pluripotent cells, this conversion was inhibited by Oct1 overexpression, suggesting that the balance of Oct proteins maintains SSC identity. These results suggest that culture-induced reprogramming is caused by unstable DNA methylation, and that Dmrt1-Sox2 cascade is critical for regulating pluripotency in SSCs.
Regulation of pluripotency in male germline stem cells by Dmrt1.
Specimen part, Treatment
View SamplesA single spermatogonial stem cell can aquire pluripotentiality but that conversion into a pluripotent cell type is accompanied by loss of spermatogenic potential.
Pluripotency of a single spermatogonial stem cell in mice.
No sample metadata fields
View SamplesThe activation signaling of transcription factor nuclear factor-kB (NF-kB) plays central role for immune system. One of key kinase mediating this pathway is TAK1 in adaptive and innate immunity.
Positive feedback within a kinase signaling complex functions as a switch mechanism for NF-κB activation.
Sex, Specimen part
View SamplesERRa is an orphan nuclear receptor with an established role in cell metabolism. Our studies demonstrate that acute or chronic loss of ERRa broadly affects mitochondrial and glycolytic metabolism in CD4+ T cells and results in diminished T cell function and differentation.
Estrogen-related receptor-α is a metabolic regulator of effector T-cell activation and differentiation.
Specimen part, Treatment
View SamplesWe found that CITED2 is highly expressed in metastatic prostate cancer, and its expression is correlated with poor survival in pateints. In this study, we used an siRNA to decrease CITED2 expression in PC3 cells. A RNA-seq approach was utilized in order to determine global gene expression changes in CITED2 knockdown cells compared to control cells. Overall design: PC3 cells transfected with control siRNAs were used as controls. Cells transfected with siRNAs targeting CITED2 were used as experimental group. Cells were transfected for 72 hr and the analyses were done.
Aberrant expression of CITED2 promotes prostate cancer metastasis by activating the nucleolin-AKT pathway.
Cell line, Subject
View SamplesOur previous investigation indicated that high-virulence C. gattii (C. gattii TIMM 4097) tend to reside in the alveoli, whereas low-virulence C. gattii (C. gattii TIMM 4903) tend to be washed out from the alveoli and move into the central side of the respiratory system. To test this hypothesis, we performed microarray assay.
How histopathology can contribute to an understanding of defense mechanisms against cryptococci.
Sex, Specimen part
View SamplesExperiment design
Glucose-dependent cell size is regulated by a G protein-coupled receptor system in yeast Saccharomyces cerevisiae.
No sample metadata fields
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