Project description:This SuperSeries is composed of the following subset Series: GSE17349: Expression data for melanoma short-term cultures and cell lines GSE17359: Affymetrix SNP array data for 3 melanoma short-term cultures and cell lines GSE20156: RNA-Seq of melanoma short-term cultures and cell lines Refer to individual Series
Project description:We profiled the gene expression levels from 8 melanoma short-term cultures and 1 melanoma cell line in order to compare to expression level estimates obtained by RNA-seq.
Project description:Investigation of expression differences induced by expression of the histone methyltransferase SETDB1 in human melanoma short-term culture WM451-Lu. A six-chip study using total RNA prepared from WM451-Lu melanoma short-term cultures infected with either a lentivirus encoding GFP (control) or SETDB1. Cells were allowed to grow for 2 days post-infection.
Project description:In our lab we detected focal genomic amplification of PDE1C in 90% of short term GBM cultures. Knocking down of PDE1C was associated with compromised capacity opf these cultures to proliferate, migrate and invade. Therefore we carried out affymetric whole genome expression analysis to identify the down stream gene effectors of this function effects. IN1472 and IN1760 - 2 GBM short term cultures were transfected with siRNA either for PDE1C (siPD) or non-targeting (siNT) and its down gene effectors were studied.
Project description:In our lab we detected focal genomic amplification of PDE1C in 90% of short term GBM cultures. Knocking down of PDE1C was associated with compromised capacity opf these cultures to proliferate, migrate and invade. Therefore we carried out affymetric whole genome expression analysis to identify the down stream gene effectors of this function effects.
Project description:Identification of RNA-based alterations in melanoma by RNA-Seq, including gene fusions, sequence mutations, and aberrant gene expression levels (to compare to expression level estimates obtained by microarray).
Project description:Uveal melanoma cell lines and short-term cultures of human uveal melanoma cells from biopsy samples were treated with 100 nM FR900359 or vehicle. RNA-seq was performed.
Project description:Background To identify the spectrum of malignant attributes maintained outside the host environment, we have compared global gene expression in primary breast tumors and matched short-term epithelial cultures. Results In contrast to immortal cell lines, a characteristic 'limited proliferation' phenotype was observed, which included over expressed genes associated with the TGFbeta signal transduction pathway, such as SPARC, LOXL1, RUNX1, and DAPK1. Underlying this profile was the conspicuous absence of hTERT expression and telomerase activity, a significant increase in TGFbeta receptor2, its cognate ligand, and the CDK inhibitor, p21CIP1/WAF1. Concurrently, tumor tissue and primary cultures displayed low transcript levels of proliferation-related genes, such as, TOP2A, ANKT, RAD51, UBE2C, CENPA, RRM2, and PLK. Conclusions Our data demonstrate that commonly used immortal cell lines do not reflect some aspects of tumor biology as closely as primary tumor cell cultures. The gene expression profile of malignant tissue, which is uniquely retained by cells cultured on solid substrates, could facilitate the development and testing of novel molecular targets for breast cancer.
Project description:Promoter hypermethylation and transcriptional silencing is a common epigenetic mechanism of tumour suppressor inactivation in cancer, including malignant brain tumours. To identify targets of epigenetic silencing mediated by CpG island methylation in paediatric ependymoma, we used a pharmacological unmasking approach through treatment with the demethylating agent 5-Aza-2M-bM-^@M-^Y-deoxycytidine followed by global expression microarray analysis. Three short-term ependymoma cell cultures were used for whole genome expression analysis following treatment with the demethylating agent 5-Aza-dC (5 M-BM-5mol/L) or mock-treated with DMSO (M-bM-^IM-$0.1% v/v) for 96-hrs.
Project description:Investigation of expression differences induced by expression of the histone methyltransferase SETDB1 in human melanoma short-term culture WM451-Lu.