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Effect of Seprase/FAP alpha on the metastasis of human melanoma LOX cell

ABSTRACT: In order to detect the molecular mechanism of seprase involved in tumor metastasis, a comparison of gene expression pattern was made between two groups of human melanoma LOX cell sublines, one is transfected with mock vector expressing GFP only (GUS-1, GUS-2 and GUS-3) and the other with pGUS expressing GFP and siRNA targeting mRNA of seprase/FAP alpha (sep-1, sep-2 and sep-3). Keywords: other

ORGANISM(S): Homo sapiens

PROVIDER: GSE1773 | GEO | 2008/09/01

SECONDARY ACCESSION(S): PRJNA90321

REPOSITORIES: GEO

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Transcription profiling of human melanoma LOX cells to investigate the effect of Seprase/FAP alpha on metastatis

Project description:In order to detect the molecular mechanism of seprase involved in tumor metastasis, a comparison of gene expression pattern was made between two groups of human melanoma LOX cell sublines, one is transfected with mock vector expressing GFP only (GUS-1<GSM30738>, GUS-2<GSM30729> and GUS-3<GSM30730>) and the other with pGUS expressing GFP and siRNA targeting mRNA of seprase/FAP alpha (sep-1<GSM30731>, sep-2<GSM30732> and sep-3<GSM30740>).

2008-10-25 | E-GEOD-1773 | biostudies-arrayexpress

LOX-1-dependent transcriptional regulation after oxidized LDL (OxLDL) treatment of human aortic endothelial cells.

Project description:LOX-1 is the primary endothelial receptor for oxidized LDL in endothelial cells and plays a role in the development of atherosclerosis. Expression profiling was carried out on samples from HAECT cells over-expressing either LOX-1 or GFP control and treated with or without OxLDL over a time course of 2, 6, 12 and 24 Hours. The goal of the study was to identify genes expression changes activated by OxLDL binding to LOX-1 at several different time points.

2009-10-07 | GSE13139 | GEO

Transcriptomic profiling of FAP+ fibroblasts

Project description:FAP+ cells had been reported to be present only in healing wounds and at sites of tissue remodelling. We have found FAP+ cells in many normal tissues and aimed to investigate whether these cells were related or whether FAP is upregulated in response to an external stimulus on a variety of cells. Furthermore we wanted to investigate whether FAP+ cells are simply fibroblasts and so compared their transcriptomic profiles to that of a typical fibroblastic population, the murine embryonic fibroblast. FAP+ cells were sorted from two mesenchymal tissues, visceral adipose and skeletal muscle, and from an epithelial organ, the pancreas. These were compared to MEFs. Cells were isolated in duplicate experiments and these were analysed separately. These were compared to previously published publically available CD4+ T-cell subset data.

2013-07-15 | E-GEOD-39438 | biostudies-arrayexpress

Molecular Targeting of 15-Lipoxygenase-1 (15-LOX-1) for Apoptosis Induction in Human Colorectal Cancers

Project description:Primary Objective: * To determine whether celecoxib downregulates GATA-6 expression to upregulate 15-LOX-1 expression and induce apoptosis in human rectal tumors, researchers will measure GATA-6 and 15-LOX-1 expression, 13-S-HODE levels, and apoptosis rates in normal and colorectal polyp epithelial tissues before and after 6 months of celecoxib treatment of patients with familial adenomatous polyposis (FAP).

| 2042215 | ecrin-mdr-crc

Effect of LOX-PP on the gene expression profile of the A673 cell line (Ewing sarcoma)

Project description:In this study we show that lysyl oxidase (LOX), an enzyme involved in maintaining structural integrity of the extracellular matrix, is expressed at low levels in Ewing sarcoma cells and primary tumors and is downregulated by the EWS/FLI1 oncoprotein characteristic of these tumors. Using a doxycycline inducible system to restore LOX expression in an Ewing sarcoma derived cell line, we show that LOX displays tumor suppressor activities. Interestingly, we show that the tumor suppressor activity resides in the propeptide domain of LOX (LOX-PP), an N-terminal domain produced by proteolytic cleavage during the physiological processing of LOX. Finally, we show that LOX-PP inhibits ERK/MAPK signalling pathway, and that many pathways involved in cell cycle progression were significant deregulated by LOX-PP, providing a mechanistic explanation to the cell proliferation inhibition observed upon LOX-PP expression. In summary, our observations indicate that deregulation of the LOX gene participates in Ewing sarcoma development and identify LOX-PP as a new therapeutic target for one of the most aggressive paediatric malignancies. These findings suggest that therapeutic strategies based in the administration of LOX propeptide or functional analogues could be useful in the treatment of this devastating paediatric cancer. A673 cells derived from Ewing sarcoma were genetically enginereed to express LOX-PP upon doxycycline stimulation (72 hours). Three independent experiments from control cells and three independent experiments from A673 cells expressing LOX-PP were done. Gene expression profile in A673 cells expressing LOX-PP vs control cells were compared.

2013-12-31 | E-GEOD-46407 | biostudies-arrayexpress

Pouch transcriptional differences between UC and FAP indicate altered immune response.

Project description:A total proctocolectomy with ileal pouch-anal anastomosis (IPAA) is considered the surgery of choice for definitive management of familial adenomatous polyposis (FAP) and selected patients with ulcerative colitis (UC). However, this surgical treatment often associates with a long-term complication, pouchitis, which occurs mostly in UC patients. To better define the molecular background of pouchitis, the microarray-based survey was performed using pouch mucosal samples collected from 28 and 8 patients operated for UC and FAP, respectively. A number of 4771 genes was significantly differentiating uninflamed from inflamed mucosal samples, and their functional features were represented mostly by alerted metabolic and cell proliferation pathways. In contrast, functional analyses of aberrantly expressed probe sets between UC and FAP samples, irrespectively of mucosal inflammation status, revealed multiple pathways and terms which were linked to changes in immune response. Noteworthy, the comparison of uninflamed UC and FAP samples distinguished a set of 26 altered mRNAs including inflammation-related transcript encoding a Charcot-Leyden crystal (CLC) protein. The most discrete changes in gene expression profiles differentiating uninflamed UC and FAP mucosal samples were attributed to a Gene Ontology category innate immune response. Our study confirmed alterations of the immune responses as dominant in UC pouchitis which were earlier found in the studies using analyses of singular molecular elements. This observation may be important when managing IPAA patients. Each sample represents three biopsies taken from single patient, from the same areas of the lower part of the pouch mucosa (above the rectal cuff) during endoscopic examination. 28 patients underwent surgery for UC and 8 patients for FAP.

2014-05-01 | E-GEOD-50788 | biostudies-arrayexpress

Expression data from E11.5 mouse branchial arch 1 (BA1) - comparison between Ezh2lox/lox and Wnt1Cre Ezh2lox/lox embryos

Project description:Conditional ablation of Ezh2 in the neural crest lineage results in loss of the neural crest-derived mesenchymal derivatives. In this data sheet we determine gene expression analysis in Ezh2lox/lox and Wnt1Cre Ezh2lox/lox in E11.5 mouse BA1 cells. Conditional ablation of Ezh2 in the neural crest lineage was achieved by crossing Wnt1creEzh2lox/wt mice with Ezh2lox/lox mouse lines. We analyzed a total of 6 samples including 3 biological replicates from Ezh2lox/lox embryos and 3 biological replicates from Wnt1cre Ezh2lox/lox embryos.

2013-11-09 | E-GEOD-52220 | biostudies-arrayexpress

SNP data of Familial adenomatous polyposis (FAP) organoids

Project description:FAP is an autosomal-dominant inherited disease caused by germline mutations in the APC gene 1. Two major FAP phenotypes, CFAP and AFAP, can be distinguished based on polyp numbers and age of onset. CFAP is characterized by the presence of hundreds to thousands of polyps. About half of these patients develop adenomas by age 15, and 95% develop adenomas by age 35. AFAP patients exhibit a milder phenotype than CFAP patients; AFAP is characterized by fewer polyps, later adenoma onset, and lower CRC risk. We used microarrays to analyze chromosome abberation of organids established from FAP patients.

2019-12-31 | GSE109813 | GEO

Mucosa samples from patients with Familial Adenomatous Polyposis (FAP)

Project description:The genetic alterations of intestinal carcinogensis have been observed in multiple comparative studies. However, transcriptomic characteristics of at-risk muocsa and adenomas from patients with FAP are still lacking. Therefore, our aim was to characterize the transcriptomic profile of at-risk mucosa of FAP patients.

2021-08-19 | GSE136044 | GEO

Expression data from E11.5 mouse branchial arch 1 (BA1) - comparison between Ezh2lox/lox and Wnt1Cre Ezh2lox/lox embryos

2013-11-09 | GSE52220 | GEO

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