In this study, we have utilized wild-type (WT) and aromatase knockout (ArKO; estrogen free) mouse ovaries as an in vivo model to profile estrogen dependent genes. RNA from each individual ovary (n=3) was analyzed by a microarray-based screen using Illumina Sentrix Mouse WG-6 BeadChip (45,281 transcripts).
Estrogen-dependent gene expression in the mouse ovary
Sex, Age, Specimen part
View SamplesInduced pluripotent stem cells (iPSCs) have been generated from various somatic cells under feeder-layer conditions. These feeder-derived iPSCs generated in different labs exhibit greater variability than between different traditional embryo derived hESC lines. For that reason, it is important to develop a standard and defined system for deriving autologous patient stem cells. We have generated iPSCs under feeder-free conditions using Matrigel coated vessels in chemically defined medium, mTeSR1. These feeder-free derived iPSCs are in many ways similar to feeder-derived iPSCs and also to hESCs, with respect to their pluripotent gene expression (OCT4, NANOG, SOX2), protein expression (OCT4, NANOG, SSEA4, TRA160) and differentiation capabilities.
Human induced pluripotent stem cells derived under feeder-free conditions display unique cell cycle and DNA replication gene profiles.
Specimen part
View SamplesInduced pluripotent stem cell (iPSC) disease models have been generated for a number of diseases, and some have shown their potential utilization for pathological and drug toxicological evaluations. We have generated two hiPSC clones from a non-familial Alzheimers patient (AD-iPSCs), which expressed typical undifferentiated markers and fulfilled standard pluripotency assays. Genome-wide microarray analysis revealed that AD-iPSCs are highly similar to control hiPSCs and hESCs, albeit with some noticeable differences in several genes: DNAJC15, GRPR, NAIP and SNORD116-18. Several other biomarkers were differentially expressed in AD-iPSC clones, which were implicated in memory impairment and AD. Furthermore, well characterized familial AD-associated genes (APP, PSEN1, PSEN2) and non-familial (A2M, APOE, GAP43, MAOA, MPO, PLAT, PLAU, SORL1, SNCA) exhibited different expression patterns but were largely reset upon reprogramming into a pluripotent state. Overall, hiPSCs can be good candidates for AD modeling and may represent an in vitro alternative to studying disease mechanisms and drug discovery/toxicology studies.
No associated publication
Specimen part
View SamplesThis SuperSeries is composed of the SubSeries listed below.
MicroRNA-34c is associated with emphysema severity and modulates SERPINE1 expression.
Sex, Age, Cell line
View SamplesTo define the role of microRNAs and their mRNA targets in emphysema severity in COPD patients.
No associated publication
Cell line
View SamplesIdentification of novel, highly penetrant, breast cancer susceptibility genes will require the application of additional strategies beyond that of traditional linkage and candidate gene approaches. Approximately one-third of inherited genetic diseases, including breast cancer susceptibility, are caused by frameshift or nonsense mutations that truncate the protein product [1]. Transcripts harbouring premature termination codons are selectively and rapidly degraded by the nonsense-mediated mRNA decay (NMD) pathway. Blocking the NMD pathway in any given cell will stabilise these mutant transcripts, which can then be detected using gene expression microarrays. This technique, known as gene identification by nonsense-mediated mRNA decay inhibition (GINI), has proved successful in identifying sporadic nonsense mutations involved in many different cancer types. However, the approach has not yet been applied to identify germline mutations involved in breast cancer. We therefore attempted to use GINI on lymphoblastoid cell lines (LCLs) from multiple-case, non-BRCA1/2 breast cancer families in order to identify additional high-risk breast cancer susceptibility genes.
No associated publication
Sex, Cell line
View Samples63 melanoma cell lines hybridized to Affymetrix Hu133_Plus 2 oligo arrays. The aim of this study was to identify potential downstream targets of key oncogenes and TSGs in melanoma (including p14ARF, p16INK4A, BRAF etc).
Confirmation of a BRAF mutation-associated gene expression signature in melanoma.
No sample metadata fields
View SamplesThis SuperSeries is composed of the SubSeries listed below.
Enduring epigenetic landmarks define the cancer microenvironment.
Sex, Specimen part, Subject
View SamplesThis SuperSeries is composed of the SubSeries listed below.
No associated publication
Specimen part, Treatment
View Samples35 Melanoma cell lines hybridized to Affymetrix Hu133_Plus 2 microarrays were analysed for genes differentially expressed between cell lines carrying wild-type p14ARF and those with mutant 14ARF. All of these cell lines contained wild-type p53 (so that the effects of p14ARF mutations could be analysed without contamination from p53).
Gene expression profiling in melanoma identifies novel downstream effectors of p14ARF.
No sample metadata fields
View Samples