Angioimmunoblastic T cell lymphoma (AITL) represents a distinctive form of peripheral T cell lymphoma with a dismissal prognosis. Recent exome sequencing in AITL patients revealed frequent coexistence of somatic mutations in the RHO GTPase (RHOAG17V) and the 5-methylcytosine oxidase TET2. Here we demonstrated that Tet2 loss and RhoAG17V cooperatively caused abnormal CD4+ T cell proliferation and differentiation by perturbing FoxO1 gene expression and its subcellular localization, an abnormality that is also detected in AITL tumor samples. Re-expression of FoxO1 attenuated aberrant immune responses induced by genetic lesions in both Tet2 and RhoA. Our findings suggest that mutational cooperativity between epigenetic factors and GTPases in adult CD4+ T cells may account for immunoinflammatory responses that are commonly associated with AITL. Overall design: Determine the differential expressed genes between WT, Tet2-/-, RhoAG17V, Tet2-/-RhoAG17V mutant CD4+ T cells.
Mutations in 5-methylcytosine oxidase TET2 and RhoA cooperatively disrupt T cell homeostasis.
Specimen part, Cell line, Subject
View SamplesBone marrow derived macrophages 1 M CpG or 20 g/ml TDB, an analogon to the mycobacterial cord factor TDM for 8h, 24h, 48h and 72h respectively.
Adjuvanticity of a synthetic cord factor analogue for subunit Mycobacterium tuberculosis vaccination requires FcRgamma-Syk-Card9-dependent innate immune activation.
No sample metadata fields
View SamplesBone marrow derived macrophages from wt and card9 KO mice were stimulated with CpG, Curdlan or TDB, an analogon to the mycobacterial cord factor TDM for 48h, respectively.
Adjuvanticity of a synthetic cord factor analogue for subunit Mycobacterium tuberculosis vaccination requires FcRgamma-Syk-Card9-dependent innate immune activation.
No sample metadata fields
View SamplesRegeneration of transgenic cells remains a major obstacle to research and commercial deployment of transgenic plants for most species.
Genome scale transcriptome analysis of shoot organogenesis in Populus.
Sex
View SamplesXenotransplantation holds the promise of providing an unlimited supply of donor organs for terminal patients with organ failure. The gal carbohydrate results in rejection of wild type pig grafts, however, chimerism established by expression of the GalT gene prior to transplantation in GalT knockout mice results in tolerance to Gal+ heart grafts.
Intragraft gene expression profile associated with the induction of tolerance.
No sample metadata fields
View SamplesWe used microarrays to observe the global gene expression in hematopoietic stem and projenitor cells during ex vivo culture with DMSO (Blank) or with Garcinol (GAR) and identified distinct classes of up or down-regulated genes.
Ex vivo expansion of human hematopoietic stem cells by garcinol, a potent inhibitor of histone acetyltransferase.
Specimen part, Treatment
View SamplesThe circadian clock generates daily rhythms in mammalian liver processes, such as glucose and lipid homeostasis, xenobiotic metabolism, and regeneration. The mechanisms governing these rhythms are not well understood, particularly the distinct contributions of the cell-autonomous clock and central pacemaker to rhythmic liver physiology. Through microarray expression profiling in MMH-D3 hepatocytes, we identified over 1,000 transcripts that exhibit circadian oscillations, demonstrating that many rhythms can be driven by the cell-autonomous clock and that MMH-D3 is a valid circadian model system. The genes represented by these circadian transcripts displayed both co-phasic and anti-phasic organization within a protein-protein interaction network, suggesting the existence of competition for binding sites or partners by genes of disparate transcriptional phases. Multiple pathways displayed enrichment in MMH-D3 circadian transcripts, including the polyamine synthesis module of the glutathione metabolic pathway. The polyamine synthesis module, which is highly associated with cell proliferation and whose products are required for initiation of liver regeneration, includes enzymes whose transcripts exhibit circadian oscillations, such as ornithine decarboxylase (Odc1) and spermidine synthase (Srm). Metabolic profiling revealed that the enzymatic product of SRM, spermidine, cycles as well. Thus, the cell-autonomous hepatocyte clock can drive a significant amount of transcriptional rhythms and orchestrate physiologically relevant modules such as polyamine synthesis.
Cell-autonomous circadian clock of hepatocytes drives rhythms in transcription and polyamine synthesis.
Specimen part, Cell line
View SamplesIn an acute skin wound, newly released serum growth factors in the wound bed drive lateral migration of human keratinocytes (HKs) to re-epithelialize the wound. However, profiling the migration signal-specific genes has long been challenged by pleiotropic effects of a given growth factor, including proliferation, migration and factor-specific responses. To overcome these technical problems, we 1) took advantage of a unique response of HKs to transforming growth factor-beta (TGFbeta) to selectively suppress growth signal-responding genes and identify motility-specific genes and 2) employed dual stimulation of HKs with TGFalpha and insulin to identify the common genes and eliminate factor-specific genes. Under these conditions, DNA microarray analyses were utilized to study the profiles of both TGFalpha-regualted and insulin-regulated immediate early (IE, 30 min), early (E, 60 min) and delayed early (DE, 120 min) genes.
Profiling motility signal-specific genes in primary human keratinocytes.
No sample metadata fields
View SamplesThe publicly available genome sequence information of two rice strains, japonica cultivar Nipponbare and indica cultivar 93-11, opens a great opportunity for investigation of performances DNA genotyping by high-density oligonucleotide arrays. Here, we compare single feature polymorphism (SFP) detection performances between whole genome hybridization and transcript hybridization using Affymetrix Rice Expression Array and the two rice cultivars.
A simple optimization can improve the performance of single feature polymorphism detection by Affymetrix expression arrays.
Specimen part
View SamplesAnalysis to find splicing variants that are differentially expressed in a highly metastatic stomach cancer cell line, MKN45P, versus its parental cell line, MKN45
Identification of a novel protein isoform derived from cancer-related splicing variants using combined analysis of transcriptome and proteome.
Specimen part, Cell line
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