Project description:This Hi-C experiment was a part of a research which analyzed chromosomal structural aberrations in hematological malignancies. First, the author conducted comprehensive detection of fusion transcripts in RNA-seq data of DSMZ’s 99 cell lines, and then picked up cell lines with characteristic complex karyotype. NB-4 cell line is one of them, which shows characteristic fusion cluster in 8q24 region in the fusion detection step. This Hi-C experiment revealed amplifications of MYC, PVT1, and CCDC26 in 8q24 region. Additionally, several structural aberrations were found by scanning the whole genome.
Project description:Neurotrophin receptors play a pivotal role in the biology and prognosis of neuroblastoma (NB). While expression of TrkA/NTRK1 confers a good prognosis to NB patients, expression of TrkB/NTRK2 is associated with unfavorable outcome. We have transfected the neurotrophin-receptor null cell line SY5Y with either full-length TrkA or TrkB and performed transcriptional profiling to analyse the effects of Trk-expression without activation and in a time course after activation.
Project description:A neuroblasoma cell line, NB-1, was treated with a DNA demethylating agents (5-aza-2'-deoxycytidine: 5-aza-dC). Genome-wide DNA methylation was analyzed using the Infinium HumanMethylation450 BeadChip.
Project description:We cultured adherent primary cell lines from NB tumor samples. Adherent primary cell lines from NB tumor samples have a subpopulation of neural crest progenitors that grow as spheres when cultured in low-binding conditions.
Project description:This Hi-C experiment was a part of a research which analyzed chromosomal structural aberrations in hematological malignancies. First, the author conducted comprehensive detection of fusion transcripts in RNA-seq data of DSMZ’s 99 cell lines, and then picked up cell lines with characteristic complex karyotype. U-937 cell line is one of them, which shows several characteristic “high-intensity bands” in contact maps. This Hi-C experiment revealed ectopic gene amplifications of cancer-associated genes.
Project description:We cultured adherent primary cell lines from NB tumor samples. Adherent primary cell lines from NB tumor samples have a subpopulation of neural crest progenitors that grow as spheres when cultured in low-binding conditions. We tested the changes in gene expression induced by endothelin-1 (ET1), a cytokine that regulates proliferation, migration, differentiation and survival of NC cells .
Project description:Metastases in the bone marrow (BM) are grim prognostic factors in patients with neuroblastoma (NB). In spite of extensive analysis of primary tumor cells from high- and low-risk NB patients, a characterization of freshly isolated BM-infiltrating metastatic NB cells is still lacking. Our aim was to identify proteins specifically expressed by metastatic NB cells, that may be relevant for prognostic and therapeutic purposes. Metastatic NB cells were freshly isolated from patients’ BM by positive immunomagnetic bead manipulation using anti-GD2 monoclonal antibody. Unselected BM samples from patients with metastatic NB were also included. Gene expression profiles were compared with those obtained from archived NB primary tumors from patients with 5y-follow-up. After validation by RT-qPCR, expression/secretion of the proteins encoded by the up-regulated genes in the BM-infiltrating NB cells was evaluated by flow cytometry and ELISA. Compared to primary tumor cells, BM-infiltrating NB cells down-modulated the expression of CX3CL1, AGT, ATP1A2 mRNAs, whereas they up-regulated several genes commonly expressed by various lineages of BM resident cells. BM-infiltrating NB cells expressed indeed the proteins encoded by the top-ranked genes, S100A8 and A9 (calprotectin), CD177 and CD3, and secreted the CXCL7 chemokine. BM-infiltrating NB cells also expressed CD271 and HLA-G. We have identified proteins specifically expressed by BM-infiltrating NB cells. Among them, calprotectin, a potent inflammatory protein, and HLA-G, endowed with tolerogenic properties facilitating tumor escape from host immune response, may represent novel biomarkers and/or targets for therapeutic intervention in high-risk NB patients.
Project description:A neuroblastoma cell line, NB-1, was treated with mock, a DNA demethylating agent (5-aza-2'-deoxycytidine: 5-aza-dC), a synthetic retinoic acid (tamibarotene: TBT), and the combination of 5-aza-dC and TBT. A genome-wide gene expression analysis was performed using SurePrint G3 Human Gene Expression 8 x 60K v2 Microarray.