Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Transcription profiling of human neuroblastoma cell line SH-SY5Y transfected to produce phenotypes with low, medium or high levels of beta-amyloid peptides with 40 or 42 amino acids

ABSTRACT: Alzheimer's disease (AD) is characterized by massive neurodegeneration and multiple changes in cellular processes, including neurogenesis. Proteolytic processing of the amyloid precursor protein (APP) plays a central role in AD. Due to varying APP processing, several beta-amyloid peptides are generated. In contrast to the form with 40 amino acids, the variant with 42 amino acids is thought to be the pathogenic form triggering the pathophysiological cascade in AD. Here, we studied the transcriptomic response to increased or decreased Abeta42 levels generated in human neuroblastoma cells. Genome-wide expression profiles (Affymetrix)were used to analyze the cellular response to the changed Abeta42 and Abeta40-levels.

Human neuroblastoma cell line SH-SY5Y is a thrice cloned (SK-N-SH -> SH-SY -> SH-SY5 -> SH-SY5Y) subline of the neuroblastoma cell line SK-N-SH which was isolated and established in 1970. This cell line has 47 chromosomes. The cells possess a unique marker comprised of a chromosome 1 with a complex insertion of an additional copy of a 1q segment into the long arm, resulting in trisomy of 1q. The cell lines used in this study are SHSY5Y transfected with the constructs pCEP-C99I45F, pCEP-C99V50F, pCEP-C99 wildtype or mock transfected with an empty vector. Independent cell clones of each transfected line were used to provide biological replicates.
Overexpressed C99 I45F is intracellularly cleaved resulting in high Abeta42, but low Abeta40 levels.
Overexpressed C99V50F is intracellularly cleaved resulting in low Abeta42, but high Abeta40 levels.
Overexpressed C99 wildtype is intracellularly cleaved resulting in medium Abeta42 and Abeta40 levels
Mock is the SHSY5Y cell line transfected with the empty vector pCEP (Invitrogen) as a negative control

ORGANISM(S): Homo sapiens

SUBMITTER: Markus Uhrig

PROVIDER: E-MEXP-1913 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

New Alzheimer amyloid beta responsive genes identified in human neuroblastoma cells by hierarchical clustering.

Uhrig Markus M Ittrich Carina C Wiedmann Verena V Knyazev Yuri Y Weninger Annette A Riemenschneider Matthias M Hartmann Tobias T

PloS one 20090826 8

Alzheimer's disease (AD) is characterized by neuronal degeneration and cell loss. Abeta(42), in contrast to Abeta(40), is thought to be the pathogenic form triggering the pathological cascade in AD. In order to unravel overall gene regulation we monitored the transcriptomic responses to increased or decreased Abeta(40) and Abeta(42) levels, generated and derived from its precursor C99 (C-terminal fragment of APP comprising 99 amino acids) in human neuroblastoma cells. We identified fourteen diff ...[more]

PMID: 19707560

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Project description:MYCN is an oncogene amplified in approximately 20% of all neuroblastomas and 50% of high risk neuroblastoma. It is a transcription factor regulating the expression of genes involved in proliferation and apoptosis.We would like to identify genes potentially regulated by MYCN in a conditional MYCN expression system. The SHEP Tet21N system is a conditional, tetracycline-regulated MYCN expression system established in the MYCN non-amplified SHEP neuroblastoma cell line (Lutz et al., 1996). Expression of MYCN is switched off by the addition of tetracycline to the growth medium. Levels of MYCN protein and RNA in the absence of tetracycline are comparable with those present in MYCN amplified cell lines (Bell et al., 2006). By performing microarray analyses on the Tet21n cell lines in the presence and absence of MYCN we hope to identify genes whose expression had been altered by MYCN either upregulated or downregulated and may be potential MYCN targets. The altered expression of some of these genes will then be validated using quantitative RTPCR and a selection will be further investigated to determine if they are MYCN transcriptional targets and may be potential candidates for anti-MYCN therapies for neuroblastoma Specific objectives 1) To investigate genes which are altered by 2 fold or more in the presence of or absence of MYCN in Tet21N cells. Refs: Bell, E., Premkumar, R., Carr, J., Lu, X., Lovat, P.E., Kees, U.R., Lunec, J. & Tweddle, D.A. (2006). The role of MYCN in the failure of MYCN amplified neuroblastoma cell lines to G1 arrest after DNA damage. Cell Cycle, 5, 2639-47. Lutz, W., Stohr, M., Schurmann, J., Wenzel, A., Lohr, A. & Schwab, M. (1996). Conditional expression of N-myc in human neuroblastoma cells increases expression of alpha-prothymosin and ornithine decarboxylase and accelerates progression into S-phase early after mitogenic stimulation of quiescent cells. Oncogene, 13, 803-12.

Dataset Information

Transcription profiling of human neuroblastoma cell line SH-SY5Y transfected to produce phenotypes with low, medium or high levels of beta-amyloid peptides with 40 or 42 amino acids

Publications

New Alzheimer amyloid beta responsive genes identified in human neuroblastoma cells by hierarchical clustering.

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