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Genome-wide gene expression profiling on pre-chemotherapy biopsies of osteosarcoma patients who developed metastases within 5yrs (n=34) and patients who did not develop metastases within 5yrs (n=19)

ABSTRACT: High-grade osteosarcoma is a malignant primary bone tumor with a peak incidence in puberty. Overall survival of patients with metastatic disease is approximately twenty percent. Mechanisms behind the development of metastases in osteosarcoma are unknown. To identify gene signatures that play a role in metastasis, we performed genome-wide gene expression profiling on pre-chemotherapy biopsies of osteosarcoma patients who developed metastases within 5yrs and patients who did not develop metastases within 5yrs.

ORGANISM(S): Homo sapiens

PROVIDER: GSE21257 | GEO | 2011/02/11

SECONDARY ACCESSION(S): PRJNA126279

REPOSITORIES: GEO

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Genome-wide gene expression profiling on pre-chemotherapy biopsies of osteosarcoma patients who developed metastases within 5yrs (n=34) and patients who did not develop metastases within 5yrs (n=19)

Project description:High-grade osteosarcoma is a malignant primary bone tumor with a peak incidence in puberty. Overall survival of patients with metastatic disease is approximately twenty percent. Mechanisms behind the development of metastases in osteosarcoma are unknown. To identify gene signatures that play a role in metastasis, we performed genome-wide gene expression profiling on pre-chemotherapy biopsies of osteosarcoma patients who developed metastases within 5yrs and patients who did not develop metastases within 5yrs. Pre-chemotherapy biopsies of osteosarcoma patients who developed metastases within 5yrs (n=34) were compared with pre-chemotherapy biopsies of osteosarcoma patients who did not develop metastases within 5yrs (n=19).

2011-02-11 | E-GEOD-21257 | biostudies-arrayexpress

Gene expression-based analysis of extra-cerebral metastases of patients with cerebrotropism (defined here as development of brain metastasis within < 6 months of stage IV disease), compared to patients who did not develop brain metastases for >18 months

Project description:To test the association between gene expression and cerebrotropism the Wilcoxon rank-sum test was utilized and revealed over 400 genes differentially expressed between thw two patient groups Please note that cerebrotropism is defined here as development of brain metastasis within < 6 months of stage IV disease In this study we utilized a well-annotated cohort of metastatic melanoma cases to acquire expression profiles of a total of 9,829 unique genes Cerebrotropism Status (provided in each sample characteristics field): 1 represents early cerebrotropic patients (patients who developed CNS metastases within 6 months of diagnosis of metastatic disease ) 0 represents non-cerebrotropic patients (patients who did not develop brain metastases for over 18 months.

2014-08-18 | E-GEOD-60464 | biostudies-arrayexpress

Canine pimary osteosarcoma tissues vs. matched lung metastases

Project description:Canine pimary osteosarcoma tissues vs. matched lung metastases

| PRJNA484630 | ENA

Genomic characterization of liver metastases from colorectal cancer patients

Project description:Genomic characterization of liver metastases from colorectal cancer patients

| PRJNA322039 | ENA

Liver metastases originating from 4 colorectal cancer patients (CRC-LM).

Project description:Using liver metastases from 4 colorectal cancer patients (CRC-LM), we explored one receptor: EGFR whose signaling triggers cell proliferation and is exacerbated in many tumors.

2023-06-14 | GSE217414 | GEO

Expression data from conventional osteosarcoma compared to primary non-neoplastic osteoblast cells

Project description:In osteosarcoma patients, the development of metastases, often to the lungs, is the most frequent cause of death. To improve this situation, a deeper understanding of the molecular mechanisms governing osteosarcoma development and dissemination and the identification of novel drug targets for an improved treatment are needed. Towards this aim, we characterized osteosarcoma tissue samples compared to primary osteoblast cells using Affymetrix HG U133A microarrays. mRNA from 5 frozen conventional osteosarcoma and 4 osteosarcoma lung metastases tumor samples and mRNA from fresh primary osteoblast cells were extracted and hybridized to HG U133A microarrays.

2010-07-30 | E-GEOD-14359 | biostudies-arrayexpress

Genomic characterization of liver metastases from colorectal cancer patients [PrimeView]

Project description:Metastatic dissemination is the most frequent cause of death sporadic colorectal cancer (sCRC) patients. The genomic abnormalities which are potentially characteristic of such advanced stages of the disease are complex and so far, they have been poorly described and only partially understood. We evaluate the molecular heterogeneity of sCRC tumors based on simultaneous assessment of the overall GEP of both coding mRNA and non-coding RNA genes in primary sCRC tumor samples from 23 consecutive patients and their paired liver metastases. Liver metastases from the sCRC patients analyzed, systematically showed deregulated transcripts of those genes identified as also deregulated in their paired primary colorectal carcinomas. However, some transcripts were found to be specifically deregulated in liver metastases while expressed at normal levels in their primary tumors, suggesting an increased genomic instability of neoplastic cells from metastatic versus primary tumor samples. Of note, once tumoral samples were normalized vs. non-tumoral colorectal tissue, only three mRNAS (i.e.: DEFB1, COL12A and PTGER3) and one miRNA (i.e.: miR-572) emerged as significantly deregulated in the liver metastases vs. the primary tumor. Canonical pathways found to be specifically deregulated in liver metastatic samples included multiple genes related with intercellular adhesion and the metastatic processes (e.g., IGF1R, PIK3CA, PTEN and EGFR), endocytosis (e.g., the PDGFRA, SMAD2, ERBB3, PML and FGFR2), and cell cycle (e.g., SMAD2, CCND2, E2F5 and MYC). Our results also highlight the activation of genes associated with the TGFβ signaling pathway, which thereby emerge as candidate genes to play an important role in CRC tumor metastasis.

2017-06-12 | GSE81558 | GEO

Methylation of osteosarcoma patients

Project description:Methylation of osteosarcoma patients

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Microarray analysis of human bone metastases samples

Project description:We performed microarray analysis with two different chip platforms, Affymetrix and Agilent, on bone metastasis samples from breast cancer patients with only bone metastases and metastases in bone and visceral organs. We collected bone metastases biopsies from breast cancer patients with only bone metastases and metastases in bone and visceral organs. RNA was extracted from these samples and subjected to microarray analysis with the Agilent platform. Data were compared with a signsture obtained with the Affymetrix platform, to obtain a signature of differentially regulated genes between the two groups of patients This Series represents the Agilent data only. The Affymetrix data are provided in GEO Series GSE11078.

2011-12-29 | E-GEOD-34485 | biostudies-arrayexpress

Genomic characterization of liver metastases from colorectal cancer patients [miRNA-3]

2017-06-12 | GSE81581 | GEO

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