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HaCaT +GLI1/2 24/72h

ABSTRACT: hybridisation of mRNA from HaCaT keratinocytes expressing GLI1 or GLI2 in an tet-inducible manner for 24h or 72h on Incyte clone set Detailed information about the protocols we used for array production, hybridisation and analysation and the biological background of our experiments can be found in our publications: PMID: 15140221, 14691458, 12165851 Keywords = GLI1/2 target genes Keywords: time-course

ORGANISM(S): Homo sapiens

PROVIDER: GSE1434 | GEO | 2005/05/25

SECONDARY ACCESSION(S): PRJNA89971

REPOSITORIES: GEO

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Homo sapiens

Project description:HaCaT +GLI1/2 24/72h

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ChIP-seq for Gli1 and Gli2 in chondrosarcoma

Project description:Excessive Hedgehog signaling in chondrocytes is sufficient to cause formation of enchondroma-like lesions in mice which can progress to chondrosarcoma. To elucidate potential mechanisms through which activation of Hedgehog signaling contributes to cartilage tumor formation, we used chromatin immunoprecipitation and next generation sequencing to identify Gli1 and Gli2 target genes in primary human chondrosarcoma. In silico analyses were conducted to identify and characterize Gli1 and Gli2 binding regions, including de novo motif analysis, co-localization with additional transcription factors, distance to transcriptional start site, conservation between human and mouse, and supervised and unsupervised analyses of biological pathways and processes. Our results profile putative unique and overlapping target genes of Gli1 and Gli2 in chondrosarcoma.

2019-12-12 | GSE100936 | GEO

GLI1 knock-down in Panc1 cells

Project description:Panc1 (human pancreatic adenocarcinoma cells) cells were transfected with control siRNA (targeting firefly luciferase, siLuc) or siRNA targeting GLI1 (siGLI1, Pool of four siRNAs). 72h following transfection, RNA was prepared for array analysis.

2012-03-31 | E-MEXP-3379 | biostudies-arrayexpress

Gene expression profiling of cidofovir treatment and resistance inHeLa, HaCaT, and PHK cells

Project description:Cidofovir is an acyclic nucleoside phosphonate with strong antiviral activity against a broad spectrum of DNA viruses. Although it has previously been shown that cidofovir exerts an antiproliferative effect on HPV positive cells by the induction of apoptosis, the exact mechanism of action remains to be unraveled. In order to study the activity of cidofovir against HPV, gene expression profiling was performed in cidofovir-treated and cidofovir-resistant HeLa, HaCaT, and PHK cells by means of microarrays (HG-U133 Plus 2, Affymetrix). Controls (untreated HeLa, HaCaT, and PHK wild-type cells): 72h of growth. Cidofovir treated (50 M-BM-5g/ml) HeLa, HaCaT, and PHK cells: 72h of growth. Cidofovir resistant cells (HeLa #52 and HaCaT #51): 72h of growth. All samples were performed in triplicates.

2013-07-03 | E-GEOD-39293 | biostudies-arrayexpress

HaCaT keratinocytes day3 vs HaCaT keratinocytes day10

Project description:The keratinocyte cell line HaCaT was cultured for three days (proliferation) or for ten days (differentiation). RNA from cells at day3 was compared to RNA from cells at day10. The microarray hybridizations were performed in dye-swap procedure : RNA from cells at day3 was labeled with Cy3 (GSM4674, GSM4675, GSM4682, GSM4683) and then with cy5 (GSM4680, GSM4681). Keywords = cell density differentiation program in human keratinocytes

2003-03-10 | E-GEOD-336 | biostudies-arrayexpress

RNA-seq and ChIP-seq identification of unique and overlapping targets of GLI transcription factors in melanoma cell lines

Project description:Despite significant progress in therapy, melanoma is still the most lethal form of skin cancer, with a rising incidence worldwide. Little is known about the impact of deregulated Hedgehog-GLI (HH-GLI) signalling pathway in the progression of this disease. Based on previous research, we hypothesized that in melanoma activation of HH-GLI signaling pathway is non- canonical due to its crosstalk with MAPK signaling pathway, which is the most deregulated pathway in melanoma. In order to investigate the link between the two pathways and to find novel GLI transcriptional targets that could be considered for potential combination therapy, we performed RNA sequencing on three melanoma cell lines with overexpressed GLI1, GLI2 and GLI3 and combined them with results of ChIP sequencing on endogenous GLI1, GLI2 and GLI3 proteins on the same cell lines. RNA-seq revealed a total of 808 DEGs for GLI1, 941 DEGs for GLI2 and 58 DEGs for GLI3. ChIP-seq identified 527 genes that contained GLI1 binding sites in their promoters, 1103 for GLI2 and 553 for GLI3. After combining these results, 21 targets were selected for validation by qPCR. Fifteen of these targets were validated in the tested cell lines, 6 of which were detected by both RNA-seq and ChIP-seq.

2023-01-01 | E-MTAB-11936 | biostudies-arrayexpress

HaCaT keratinocytes day3 vs HaCaT keratinocytes day10

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Chromatin accessibility in response to knockdown of GLI1 and SMARCA2 in GLI1-mediated gene expression.

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Project description:Increased expression of GLI1 is associated with poor prognosis for some breast cancer subtypes. A conditional transgenic GLI1 expressing mouse model, with or without heterozygous deletion of Trp53, was used to generate and study GLI1 induced mammary gland tumours. Tumour tissue was serially orthotopically transplanted for at least 10 generations in NSG mice.

2019-06-30 | E-MTAB-7531 | biostudies-arrayexpress

Hedgehog/GLI signalling and hormone independence in prostate cancer (PCa) cell lines

Project description:High levels of GLI (GLI1 and GLI2) mRNA and GLI luciferase reporter activity were detected in the androgen independent prostate cancer cell lines DU145 and PC-3 compared to the androgen-dependent LNCaP prostate cancer cell line. Subsequently, we observed that ectopic GLI1 promoted hormone independence in LNCaP cells (LNCaP-GLI1). We compared the gene expression profile of LNCaP-pBP (empty vector), LNCaP-GLI1, DU145, and PC-3 cells globally as well as to identify GLI1-regulated genes that may contribute to hormone independence. RNA was harvested and analysed from LNCap-pBP (control/reference sample), LNCaP-GLI1, DU145 and PC-3 cells

2011-02-13 | E-GEOD-27231 | biostudies-arrayexpress

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