Xenotransplantation 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 SamplesThe Affymetrix Human Genome U133 Plus 2.0 Array was used to examine the Genome wide transcriptional changes which follow the treatment of AML xenografts with either PBS control or combination of decitabine (DAC) and cytarabine (Ara-C). Animals were treated with PBS, DAC alone, Ara-C alone, DAC and Ara-C combined (D+A), DAC followed by Ara-C (D/A) or Ara-C followed by DAC (A/D).
Sequential treatment with cytarabine and decitabine has an increased anti-leukemia effect compared to cytarabine alone in xenograft models of childhood acute myeloid leukemia.
Specimen part, Disease
View SamplesWe used microarrays to examine gene expression levels from 95 unrelated CEPH-Utah individuals 0, 2 or 6 hours after treatment with 10Gy of ionizing radiation.
Stress-induced changes in gene interactions in human cells.
Cell line, Treatment, Time
View SamplesWe used microarrays to examine gene expression levels from 131 unrelated CEPH-Utah grandparents with either DMSO or tunicamycin.
Stress-induced changes in gene interactions in human cells.
Cell line, Treatment, Time
View SamplesComparison by expression profiling of tissue from dKO (utrophin/dystrophin-deficient) and MDX mice at 8 weeks of age. Independent triplicate analyses/strain were done for extraocular, hindlimb, and cardiac muscle.
Analysis of gene expression differences between utrophin/dystrophin-deficient vs mdx skeletal muscles reveals a specific upregulation of slow muscle genes in limb muscles.
No sample metadata fields
View SamplesSecond-hand smoke (SHS) exposure during pregnancy has adverse effects on offspring. We used microarrays to characterize the gene expression changes caused by in-utero exposure and adult exposure to SHS in adult mouse lungs.
In utero exposure to second-hand smoke aggravates adult responses to irritants: adult second-hand smoke.
Sex, Age, Specimen part, Treatment
View SamplesAlthough nuclear transfer allows the reprogramming of somatic cells to totipotency, little is known concerning the kinetics by which it takes place or the minimum requirements for its success. Here, we demonstrate that reprogramming can be achieved within a few hours and a single cell-cycle as long as two key constraints on reprogramming are satisfied. First, the recipient cell chromosomes must be removed during mitosis. Second, the nuclear envelope of the donor cell must be broken down and its chromosomes condensed, allowing an embryonic nucleus to be constructed around the incoming chromosomes. If these requirements are not met, then reprogramming fails and embryonic development arrests. These results point to a central role for processes intimately linked to cell division in mediating efficient transitions between transcriptional programs.
Reprogramming within hours following nuclear transfer into mouse but not human zygotes.
Specimen part
View SamplesWe addressed the clinical significance and mechanisms behind in vitro cellular responses to ionising radiation (IR)-induced DNA double strand breaks in 74 paediatric ALL patients. We found an apoptosis-resistant response in 36% of patients and an apoptosis-sensitive response in the remaining 64% of leukaemias. Global gene expression profiling of 11 apoptosis-resistant and 11 apoptosis-sensitive ALLs revealed abnormal up-regulation of multiple pro-survival pathways in response to IR in apoptosis-resistant leukaemias and differential post-transcriptional activation of the PI3-Akt pathway was observed in representative resistant cases. It is possible that abnormal pro-survival responses to DNA damage provide one of the mechanisms of primary resistance in ALL .
Stratification of pediatric ALL by in vitro cellular responses to DNA double-strand breaks provides insight into the molecular mechanisms underlying clinical response.
No sample metadata fields
View SamplesEts1-/- mice have an increase in B cell differentiation to plasma cells and increased serum immunoglobulin levels. The genes in B cells that are transcriptionally regulated by Ets1 and help regulate B cell differentiation are largely unknown. Here, we identify Ets1-regulated target genes in B cells using ChIP-seq and RNA-seq analysis. We found that Ets1 targets genes associated with immune response, mature B cell differentiation and regulation of B cell activation. Overall design: Quiescent follicular B cells were sorted from the spleens of wild-type and Ets1-/- mice using the following markers B220+ CD23-high CD21-low CD80-negative IgA-negative IgE-negative IgG1-negative IgG2a-negative IgG2b-negative IgG3-negative. Total RNA was prepared from sorted cells and subjected to RNA-sequencing.
Genome-Wide Identification of Target Genes for the Key B Cell Transcription Factor <i>Ets1</i>.
Specimen part, Cell line, Subject
View SamplesWe measured mRNA abundance in the embryogenic tissue of 150 recombinant Steptoe x Morex doubled-haploid lines (no replicates) and in parental genotypes, Steptoe and Morex, 3 replicates each, total 156 chips.
SFP genotyping from affymetrix arrays is robust but largely detects cis-acting expression regulators.
Age, Specimen part, Time
View Samples