Expression data from human primary keratinocytes
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
SUBMITTER: Hong-Lin Su
PROVIDER: E-GEOD-40233 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
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Project description:The genetic expression profile of a Wnt signal agonist, BIO, was evaluated in human primary keratinocytes.
2012-10-01 | GSE40233 | GEO
Project description:Human keratinocytes isolated from foreskin were cultured and treated with a GSK-3beta inhibitor, BIO. The effect of BIO was evaluated by the cell growth, clony formation and differentiating markers. We used microarrays to detail the global program of gene expression underlying cellularisation and identified distinct classes of up-regulated genes during this process. Human primary keratinocytes were subjected for RNA extraction. The total RNAs were hybridized on Affymetrix microarrays. The cultured cells exhibit a homogous cell morphology at passage 1 to passage 5. The cells were treated with BIO at passage 3 or 4.
2011-02-24 | E-GEOD-27509 | biostudies-arrayexpress
Project description:Epithelial cell adhesion molecule EpCAM is a single transmembrane protein, which is involved in numerous cellular processes including cell adhesion, proliferation, maintenance of stemness of embryonic cells and progenitors, migration, and invasion. Activation of signal transduction by EpCAM is warranted by regulated intramembrane proteolysis and nuclear translocation of the intracellular domain EpICD. Here, we describe matrix metalloproteinase 7 (MMP-7) as a target gene of EpCAM signalling via EpICD nuclear translocation. EpCAM and MMP-7 expression pattern and levels positively correlated in vitro and in vivo, and were strongly elevated in primary carcinomas of the head and neck area. Hence, MMP-7 is a novel target of EpCAM signalling. FaDu hypopharynx carcinoma cells were transiently transfected with a control siRNA or an EpCAM-specific siRNA. After two days, expression of EpCAM was assessed upon flow cytometry with antibodies, which specifically bind within the EGF-repeat in the extracellular domain of EpCAM (Balzar, et al., 1999). Compared to control siRNA, EpCAM siRNA induced a mean 43% reduction of EpCAM expression at the cell surface. Reduction of EpCAM expression upon siRNA treatment was confirmed by RT-PCR and qPCR. EpCAM down-regulation resulted in diminished cell proliferation assessed upon cell counting. The observed 43% decrease in cell surface expression of EpCAM translated in cell numbers diminished by 35%. This is a confirmation of earlier findings on the reduced proliferation of breast and colon cancer cell lines following siRNA-mediated knock-down of EpCAM (Maetzel, et al., 2009, Munz, et al., 2004, Osta, et al., 2004). Equal amounts of total RNA (RIN score = 10) from control- and EpCAM-siRNA-treated FaDu cells were next subjected to a single, explorative cDNA microarray analysis with the aim to identify potential target genes of the signal transduction cascade of EpCAM. All genes, which were up- or down-regulated by at least two-fold (>2-fold; 716 genes up-regulated, 552 genes down-regulated), were then subjected to a Panther classification software analysis (http://www.pantherdb.org/). Special emphasis was put on the regulation of genes associated with signalling pathways. Angiogenesis, Alzheimer's disease-presenilin pathway, Wnt signalling pathway, inflammation and cadherin signalling pathways were most strongly affected by EpCAM knock-down. mRNA levels of selected genes differently regulated following partial knock-down of EpCAM included the co-regulated genes for secreted frizzled-related protein 5, protocadherin 10, dickkopf homolog 2, MMP24, SPARC, Myst3, ErbB4, MMP12, WISP2, MMP7, Nanos1, WNT9A, and the counter-regulated genes for MMP11, fibronectin 1, DACT3, WNT2B, WNT5A, APC2, Spondin 1, and cateninM-NM-12. All genes except for protocadherin 10, Myst3, ErbB4, and WNT2B were validated in RT-PCR assays. Since several matrix metalloproteases were regulated after EpCAM knock-down and EpCAM is known to correlate with invasion, we chose this protein family for in-depth analysis. Matrix metalloprotease 7 (MMP-7) is a soluble factor, which, unlike other family members, is preferentially expressed in epithelial cells (Wilson, et al., 1995). Since EpCAM also displays highest expression in epithelia, we chose to proceed with the analysis of MMP7. SiRNA-mediated knock-down of EpCAM resulted in a comparable 50% down-regulation of MMP7 mRNA levels in RT-PCR and qPCR. Comparison of FaDu cells expressing EpCam vs FaDu cells with downregulated EpCam
2012-04-13 | E-GEOD-37257 | biostudies-arrayexpress
Project description:Background: The Epithelial Cell Adhesion Molecule (EpCAM) has been shown to be strongly expressed in human breast cancer and cancer stem cells and its overexpression has been supposed to support tumor progression and metastasis. However, effects of EpCAM overexpression on normal breast epithelial cells have never been studied before. Therefore, we analyzed effects of transient adenoviral overexpression of EpCAM on proliferation, migration and differentiation of primary human mammary epithelial cells (HMECs). METHODS: HMECs were transfected by an adenoviral system for transient overexpression of EpCAM. Thereafter, changes in cell proliferation and migration were studied using a real time measurement system. Target gene expression was evaluated by transcriptome analysis in proliferating and polarized HMEC cultures. A Chicken Chorioallantoic Membrane (CAM) xenograft model was used to study effects on in vivo growth of HMECs. RESULTS: EpCAM overexpression in HMECs did not significantly alter gene expression profile of proliferating or growth arrested cells. Proliferating HMECs displayed predominantly glycosylated EpCAM isoforms and were inhibited in cell proliferation and migration by upregulation of p27KIP1 and p53. HMECs with overexpression of EpCAM showed a down regulation of E-cadherin. Moreover, cells were more resistant to TGF-beta1 induced growth arrest and maintained longer capacities to proliferate in vitro. EpCAM overexpressing HMECs xenografts in chicken embryos showed hyperplastic growth, lack of lumen formation and increased infiltrates of the chicken leukocytes. CONCLUSIONS: EpCAM revealed oncogenic features in normal human breast cells by, inducing resistance to TGF-beta1-mediated growth arrest and supporting a cell phenotype with longer proliferative capacities in vitro. EpCAM overexpression resulted in hyperplastic growth in vivo. Thus, we suggest that EpCAM acts as a prosurvival factor counteracting terminal differentiation processes in normal mammary glands.
2013-06-20 | GSE37172 | GEO
Project description:Introduction: The Epithelial Cell Adhesion Molecule (EpCAM) has been shown to be strongly expressed in human breast cancer and cancer stem cells and its overexpression has been supposed to support tumor progression and metastasis. However, effects of EpCAM overexpression on normal breast epithelial cells have never been studied before. Therefore, we analyzed effects of transient adenoviral overexpression of EpCAM on proliferation, migration and differentiation of primary human mammary epithelial cells (HMECs). METHODS: HMECs were transfected by an adenoviral system for transient overexpression of EpCAM. Thereafter, changes in cell proliferation and migration were studied using a real time measurement system. Target gene expression was evaluated by transcriptome analysis in proliferating and polarized HMEC cultures. A Chicken Chorioallantoic Membrane (CAM) xenograft model was used to study effects on in vivo growth of HMECs. RESULTS: EpCAM overexpression in HMECs did not significantly alter gene expression profile of proliferating or growth arrested cells. Proliferating HMECs displayed predominantly glycosylated EpCAM isoforms and were inhibited in cell proliferation and migration by upregulation of p27KIP1 and p53. HMECs with overexpression of EpCAM showed a down regulation of E-cadherin. Moreover, cells were more resistant to TGF-beta1 induced growth arrest and maintained longer capacities to proliferate in vitro. EpCAM overexpressing HMECs xenografts in chicken embryos showed hyperplastic growth, lack of lumen formation and increased infiltrates of the chicken leukocytes. CONCLUSIONS: EpCAM revealed oncogenic features in normal human breast cells by, inducing resistance to TGF-beta1-mediated growth arrest and supporting a cell phenotype with longer proliferative capacities in vitro. EpCAM overexpression resulted in hyperplastic growth in vivo. Thus, we suggest that EpCAM acts as a prosurvival factor counteracting terminal differentiation processes in normal mammary glands. Differential expression was assessed with the moderated t-test (Bioconductor's limma package) with pairing of the samples by the donor. Raw p-values were adjusted for multiple hypothesis testing using the method from Benjamini and Hochberg for a strong control of the false discovery rate. EPCAM and GFP over-expression in proliferating mammary epithelial cells from two donors (6 and 8). Expression levels between EPCAM and control samples were compared to determine whether, and to which extent EPCAM over-expression alters the gene expression profile of the cells.
2013-06-13 | E-GEOD-39071 | biostudies-arrayexpress
Project description:Background: The Epithelial Cell Adhesion Molecule (EpCAM) has been shown to be strongly expressed in human breast cancer and cancer stem cells and its overexpression has been supposed to support tumor progression and metastasis. However, effects of EpCAM overexpression on normal breast epithelial cells have never been studied before. Therefore, we analyzed effects of transient adenoviral overexpression of EpCAM on proliferation, migration and differentiation of primary human mammary epithelial cells (HMECs). METHODS: HMECs were transfected by an adenoviral system for transient overexpression of EpCAM. Thereafter, changes in cell proliferation and migration were studied using a real time measurement system. Target gene expression was evaluated by transcriptome analysis in proliferating and polarized HMEC cultures. A Chicken Chorioallantoic Membrane (CAM) xenograft model was used to study effects on in vivo growth of HMECs. RESULTS: EpCAM overexpression in HMECs did not significantly alter gene expression profile of proliferating or growth arrested cells. Proliferating HMECs displayed predominantly glycosylated EpCAM isoforms and were inhibited in cell proliferation and migration by upregulation of p27KIP1 and p53. HMECs with overexpression of EpCAM showed a down regulation of E-cadherin. Moreover, cells were more resistant to TGF-beta1 induced growth arrest and maintained longer capacities to proliferate in vitro. EpCAM overexpressing HMECs xenografts in chicken embryos showed hyperplastic growth, lack of lumen formation and increased infiltrates of the chicken leukocytes. CONCLUSIONS: EpCAM revealed oncogenic features in normal human breast cells by, inducing resistance to TGF-beta1-mediated growth arrest and supporting a cell phenotype with longer proliferative capacities in vitro. EpCAM overexpression resulted in hyperplastic growth in vivo. Thus, we suggest that EpCAM acts as a prosurvival factor counteracting terminal differentiation processes in normal mammary glands. For each gene a representative transcript probe set was selected based on a score that combines average expression and variation of expression across all samples. Transcript probe sets with more than 4 probes were preferred. Differential expression analysis between EPCAM over-expressing and control cells (expressing GFP) was performed using a paired moderated t-test employing functions provided by Bioconductor's limma package. p-values were subsequently adjusted for multiple hypothesis testing using the method from Benjamini and Hochberg for a strong control of the false discovery rate.
2013-06-20 | E-GEOD-37172 | biostudies-arrayexpress
Project description:MIXL1-GFP reporter lines (HESC3MIXL1-GFP/w and MEL1MIXL1-GFP/w, referred to as HES3 and MEL1 in this submission) were differentiated as spin embryonic bodies (Ebs) supplemented with mesodermal inducing growth factors (BMP4,SCF, VEGF based). Methylcellulose hematopoietic colony forming assays were performed by culturing dissociated day 4 EBs in the presence of hematopoietic growth factors (VEGF, SCF, IL3, IL6, TPO, EPO and FLT3L) for 7-9 days. Addition of WNT3a to the methylcellulose lead to the formation of compact, mesodermal colonies, which we term 'mesosphere' (Meso-balls). We demonstrated that the inclusion of WNT3a in the methylcellulose could be replaced with BIO, a GSK3 inhibitor, acting as a canonical WNT signaling agonist. Mesospheres formed in the culture supplemented with BIO molecules were termed 'BIO-balls'. Expression profiling between 'meso-balls' and 'BIO-balls' were compared and analyzed for markers assisiting in defining their phenotypes.
2012-12-01 | E-MEXP-3738 | biostudies-arrayexpress
Project description:Epithelial cell adhesion molecule EpCAM is a single transmembrane protein, which is involved in numerous cellular processes including cell adhesion, proliferation, maintenance of stemness of embryonic cells and progenitors, migration, and invasion. Activation of signal transduction by EpCAM is warranted by regulated intramembrane proteolysis and nuclear translocation of the intracellular domain EpICD. Here, we describe matrix metalloproteinase 7 (MMP-7) as a target gene of EpCAM signalling via EpICD nuclear translocation. EpCAM and MMP-7 expression pattern and levels positively correlated in vitro and in vivo, and were strongly elevated in primary carcinomas of the head and neck area. Hence, MMP-7 is a novel target of EpCAM signalling. FaDu hypopharynx carcinoma cells were transiently transfected with a control siRNA or an EpCAM-specific siRNA. After two days, expression of EpCAM was assessed upon flow cytometry with antibodies, which specifically bind within the EGF-repeat in the extracellular domain of EpCAM (Balzar, et al., 1999). Compared to control siRNA, EpCAM siRNA induced a mean 43% reduction of EpCAM expression at the cell surface. Reduction of EpCAM expression upon siRNA treatment was confirmed by RT-PCR and qPCR. EpCAM down-regulation resulted in diminished cell proliferation assessed upon cell counting. The observed 43% decrease in cell surface expression of EpCAM translated in cell numbers diminished by 35%. This is a confirmation of earlier findings on the reduced proliferation of breast and colon cancer cell lines following siRNA-mediated knock-down of EpCAM (Maetzel, et al., 2009, Munz, et al., 2004, Osta, et al., 2004). Equal amounts of total RNA (RIN score = 10) from control- and EpCAM-siRNA-treated FaDu cells were next subjected to a single, explorative cDNA microarray analysis with the aim to identify potential target genes of the signal transduction cascade of EpCAM. All genes, which were up- or down-regulated by at least two-fold (>2-fold; 716 genes up-regulated, 552 genes down-regulated), were then subjected to a Panther classification software analysis (http://www.pantherdb.org/). Special emphasis was put on the regulation of genes associated with signalling pathways. Angiogenesis, Alzheimer's disease-presenilin pathway, Wnt signalling pathway, inflammation and cadherin signalling pathways were most strongly affected by EpCAM knock-down. mRNA levels of selected genes differently regulated following partial knock-down of EpCAM included the co-regulated genes for secreted frizzled-related protein 5, protocadherin 10, dickkopf homolog 2, MMP24, SPARC, Myst3, ErbB4, MMP12, WISP2, MMP7, Nanos1, WNT9A, and the counter-regulated genes for MMP11, fibronectin 1, DACT3, WNT2B, WNT5A, APC2, Spondin 1, and cateninα2. All genes except for protocadherin 10, Myst3, ErbB4, and WNT2B were validated in RT-PCR assays. Since several matrix metalloproteases were regulated after EpCAM knock-down and EpCAM is known to correlate with invasion, we chose this protein family for in-depth analysis. Matrix metalloprotease 7 (MMP-7) is a soluble factor, which, unlike other family members, is preferentially expressed in epithelial cells (Wilson, et al., 1995). Since EpCAM also displays highest expression in epithelia, we chose to proceed with the analysis of MMP7. SiRNA-mediated knock-down of EpCAM resulted in a comparable 50% down-regulation of MMP7 mRNA levels in RT-PCR and qPCR.
2012-04-14 | GSE37257 | GEO
Project description:Introduction: The Epithelial Cell Adhesion Molecule (EpCAM) has been shown to be strongly expressed in human breast cancer and cancer stem cells and its overexpression has been supposed to support tumor progression and metastasis. However, effects of EpCAM overexpression on normal breast epithelial cells have never been studied before. Therefore, we analyzed effects of transient adenoviral overexpression of EpCAM on proliferation, migration and differentiation of primary human mammary epithelial cells (HMECs). METHODS: HMECs were transfected by an adenoviral system for transient overexpression of EpCAM. Thereafter, changes in cell proliferation and migration were studied using a real time measurement system. Target gene expression was evaluated by transcriptome analysis in proliferating and polarized HMEC cultures. A Chicken Chorioallantoic Membrane (CAM) xenograft model was used to study effects on in vivo growth of HMECs. RESULTS: EpCAM overexpression in HMECs did not significantly alter gene expression profile of proliferating or growth arrested cells. Proliferating HMECs displayed predominantly glycosylated EpCAM isoforms and were inhibited in cell proliferation and migration by upregulation of p27KIP1 and p53. HMECs with overexpression of EpCAM showed a down regulation of E-cadherin. Moreover, cells were more resistant to TGF-beta1 induced growth arrest and maintained longer capacities to proliferate in vitro. EpCAM overexpressing HMECs xenografts in chicken embryos showed hyperplastic growth, lack of lumen formation and increased infiltrates of the chicken leukocytes. CONCLUSIONS: EpCAM revealed oncogenic features in normal human breast cells by, inducing resistance to TGF-beta1-mediated growth arrest and supporting a cell phenotype with longer proliferative capacities in vitro. EpCAM overexpression resulted in hyperplastic growth in vivo. Thus, we suggest that EpCAM acts as a prosurvival factor counteracting terminal differentiation processes in normal mammary glands. Differential expression was assessed with the moderated t-test (Bioconductor's limma package) with pairing of the samples by the donor. Raw p-values were adjusted for multiple hypothesis testing using the method from Benjamini and Hochberg for a strong control of the false discovery rate.
2013-06-13 | GSE39071 | GEO
Project description:Human keratinocytes isolated from foreskin were cultured and treated with a GSK-3beta inhibitor, BIO. The effect of BIO was evaluated by the cell growth, clony formation and differentiating markers. We used microarrays to detail the global program of gene expression underlying cellularisation and identified distinct classes of up-regulated genes during this process.
2011-02-24 | GSE27509 | GEO