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Open AccessJournal ArticleDOI

Gene expression patterns in human embryonic stem cells and human pluripotent germ cell tumors

TLDR
The gene expression patterns of human ES cell lines showed many similarities with the human embryonal carcinoma cell samples and more distantly with the seminoma samples, and 895 genes were identified that are candidates for involvement in the maintenance of a pluripotent, undifferentiated phenotype.
Abstract
Remarkably little is known about the transcriptional profiles of human embryonic stem (ES) cells or the molecular mechanisms that underlie their pluripotency. To identify commonalties among the transcriptional profiles of different human pluripotent cells and to search for clues into the genesis of human germ cell tumors, we compared the expression profiles of human ES cell lines, human germ cell tumor cell lines and tumor samples, somatic cell lines, and testicular tissue samples by using cDNA microarray analysis. Hierarchical cluster analysis of gene expression profiles showed that the five independent human ES cell lines clustered tightly together, reflecting highly similar expression profiles. The gene expression patterns of human ES cell lines showed many similarities with the human embryonal carcinoma cell samples and more distantly with the seminoma samples. We identified 895 genes that were expressed at significantly greater levels in human ES and embryonal carcinoma cell lines than in control samples. These genes are candidates for involvement in the maintenance of a pluripotent, undifferentiated phenotype.

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Journal ArticleDOI

An embryonic stem cell–like gene expression signature in poorly differentiated aggressive human tumors

TL;DR: The results reveal a previously unknown link between genes associated with ES cell identity and the histopathological traits of tumors and support the possibility that these genes contribute to stem cell–like phenotypes shown by many tumors.
Journal ArticleDOI

Derivation of human embryonic stem cells in defined conditions.

TL;DR: Feeder-independent human ES cell culture that includes protein components solely derived from recombinant sources or purified from human material is reported.
Journal ArticleDOI

Embryonic stem cells.

TL;DR: This work reviews the history of murine and human ES cell Lines, including practical and ethical aspects of ES cell isolation from pre‐implantation embryos, maintenance of undifferentiated ES cell lines in the cell culture environment, and differentiation of ES cells in vitro and in vivo into mature somatic cell types.
Journal ArticleDOI

Basic FGF and suppression of BMP signaling sustain undifferentiated proliferation of human ES cells

TL;DR: It is demonstrated that hESCs cultured in unconditioned medium (UM) are subjected to high levels of B MP signaling activity, which is reduced in CM, and the BMP antagonist noggin synergizes with basic fibroblast growth factor (bFGF) to repress BMP signaling and sustain undifferentiated proliferation of hESC in the absence of fibroblasts or CM.
Journal ArticleDOI

Characterization of human embryonic stem cell lines by the International Stem Cell Initiative

Oluseun Adewumi, +89 more
- 17 Jun 2007 - 
TL;DR: The International Stem Cell Initiative characterized 59 human embryonic stem cell lines from 17 laboratories worldwide and found that despite diverse genotypes and different techniques used for derivation and maintenance, all lines exhibited similar expression patterns for several markers ofhuman embryonic stem cells.
References
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Journal ArticleDOI

Cluster analysis and display of genome-wide expression patterns

TL;DR: A system of cluster analysis for genome-wide expression data from DNA microarray hybridization is described that uses standard statistical algorithms to arrange genes according to similarity in pattern of gene expression, finding in the budding yeast Saccharomyces cerevisiae that clustering gene expression data groups together efficiently genes of known similar function.
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Embryonic Stem Cell Lines Derived from Human Blastocysts

TL;DR: Human blastocyst-derived, pluripotent cell lines are described that have normal karyotypes, express high levels of telomerase activity, and express cell surface markers that characterize primate embryonic stem cells but do not characterize other early lineages.
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Molecular portraits of human breast tumours

TL;DR: Variation in gene expression patterns in a set of 65 surgical specimens of human breast tumours from 42 different individuals were characterized using complementary DNA microarrays representing 8,102 human genes, providing a distinctive molecular portrait of each tumour.
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Significance analysis of microarrays applied to the ionizing radiation response

TL;DR: A method that assigns a score to each gene on the basis of change in gene expression relative to the standard deviation of repeated measurements is described, suggesting that this repair pathway for UV-damaged DNA might play a previously unrecognized role in repairing DNA damaged by ionizing radiation.
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