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GSE38749
Homo sapiens
15 Downloadable Samples
Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Anatomical staging is a critical, although imperfect, instrument to assess gastric cancer prognosis and define indication for surgery and adjuvant therapy. Despite recent advances, treatment results, as a whole, remain less than satisfactory. Thus, biomarkers are sorely needed to improve risk categorization and define new molecular targets for therapy.
Publication Title
No associated publication
Sample Metadata Fields
Sex, Specimen part
View Samples- Homo sapiens
- 58 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
HER-2 positive breast cancers frequently sustain elevated AKT/mammalian target rapamycin (mTOR) signaling which has been associated with resistance to doxorubicin treatment in the clinic. In our study we investigated if the mTOR inhibitor rapamycin increased the sensitivity to doxorubicin therapy in HB4a, a luminal normal mammary cell line; C5.2, a transformed cell derived from HB4a transfected with HER-2 and SKBR3 that exhibits HER-2 amplification. Flow cytometry analysis showed that the combination treatment for 24 hours with rapamycin 20nM and doxorubicin caused accumulation of HB4a and C5.2 cells in S-G2/M. Otherwise in SKBR3 cells, we observed a relative depletion of cells in S-G2/M and concomitant accumulation in G0/G1 of 10% of the cells. The analysis of IC50 of doxorubicin alone and in combination with rapamycin indicated that the sensitivity was increased 2.37 fold in HB4a, 2.46 in C5.2 and 1.87 in SKBR3, suggesting that rapamycin might have enhanced the effects of doxorubicin. Changes in gene expression resulting from co-treatment demonstrated that functional groups of genes with roles in cell cycle, proliferation, apoptosis regulation were represented in the 3 cells analysed. Other biological functions were exclusively associated with each cell suggesting that the inhibition of mTOR activation induced by HER-2 is complex and depends on the cellular context.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part, Cell line
View Samples- Homo sapiens
- 2 Downloadable Samples
- Affymetrix Human Gene 2.0 ST Array (hugene20st)
Description
Zika virus (ZIKV) is largely known for causing brain abnormalities due to its ability to infect neural progenitor stem cells (NPC) during early development. Here we show that ZIKV is also capable of infecting and destroying stem-like cancer cells from aggressive human embryonal tumors of the central nervous system (CNS). When evaluating the oncolytic properties of Brazilian Zika virus strain (ZIKVBR) against human breast, prostate, colorectal and embryonal CNS tumor cell lines, a selective infection of CNS tumor cells, followed by a massive necrotic tumor cell death, was verified. Notably, ZIKVBR was more efficient in destroying CNS tumorspheres than normal stem cell neurospheres. A single intracerebroventricular injection of ZIKVBR in BALB/c nude mice bearing orthotopic human embryonal CNS tumor xenografts resulted in a significantly longer survival, reduced tumor burden, fewer metastasis and complete remission in some animals. Tumor cells closely resembling neural stem cells at the molecular level were more susceptible to ZIKVBR oncolytic effects. Altogether, these preclinical findings indicate that ZIKV could be an efficient oncolytic agent to treat aggressive forms of embryonal CNS tumors. Considering the poor effectiveness and severe side effects of available treatments for these tumors and that most ZIKV infections are asymptomatic, our findings open new avenues for novel therapies.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part, Cell line
View Samples- Homo sapiens
- 39 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Stroke is a brain attack cutting off vital blood, and consequently the nutrients and oxygen vital to the brain cells that control everything we do. Stroke is a complex disease with unclear pathogenesis resulting from environmental and genetic factors.
Publication Title
TTC7B emerges as a novel risk factor for ischemic stroke through the convergence of several genome-wide approaches.
Sample Metadata Fields
Sex
View Samples- Homo sapiens
- 26 Downloadable Samples
- Affymetrix Human Genome U133 Plus 2.0 Array (hgu133plus2)
Description
Behets disease (BD) is a multisystemic immuno-inflammatory disorder characterized by a generalized vasculitis, particularly at the orogenital mucosa and eye. It is a complex disease with unclear pathogenesis.
Publication Title
No associated publication
Sample Metadata Fields
Sex
View Samples- Danio rerio
- 11 Downloadable Samples
- Affymetrix Genechip Zebrafish ST Genome Array 1.1 (zebgene11st)
Description
We used the Dmrt2a inducible transgenic line Tg(hsp70:HA-dmrt2a) to do a brief dmrt2a overexpression at bud-stage in order to identify Dmrt2a immediate targets and understand its mechanism of action. Both wildtype and transgenic embryos received the same treatment.
Publication Title
No associated publication
Sample Metadata Fields
Specimen part
View Samples- Mus musculus
- 9 Downloadable Samples
- Affymetrix Mouse Gene 2.0 ST Array (mogene20st)
Description
Both, sleep deprivation and ketamine treatments are efficient and fast-acting antidepressants acting within the first 12-24 hr. post-treatment. This experiment was designed to identify if common transcriptional responses are elicited by both treatments
Publication Title
No associated publication
Sample Metadata Fields
Specimen part
View Samples- Homo sapiens
- 9 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
Inorganic arsenic, a major environmental contaminant, has risen as an important health problem worldwide. More detailed identification of the molecular mechanisms associated with iAs exposure would help to establish better strategies for prevention and treatment. Although chronic iAs exposures have been previously studied there is little to no information regarding the early events of exposure to iAs. To better characterize the early mechanisms of iAs exposure we conducted gene expression studies using sublethal doses of iAs at two different time-points. The major transcripts differentially regulated at 2 hrs of iAs exposure included antioxidants, detoxificants and chaperones. Moreover, after 12 hrs of exposure many of the down-regulated genes were associated with DNA replication and S phase cell cycle progression. Interestingly, the most affected biological pathway by both 2 or 12 hrs of iAs exposure were the Nrf2-Keap1 pathway, represented by the highly up-regulated HMOX1 transcript, which is transcriptionally regulated by the transcription factor Nrf2. Additional Nrf2 targets included SQSTM1 and ABCB6, which were not previously associated with acute iAs exposure.
Publication Title
No associated publication
Sample Metadata Fields
Cell line
View Samples- Homo sapiens
- 6 Downloadable Samples
- Affymetrix Human Gene 1.0 ST Array (hugene10st)
Description
TIMP-4 overexpression increases tumor burden in mice, promotes progenitor cell phenotype and sensitizes cells to apoptosis, by relying on NFkB signaling
Publication Title
Tissue inhibitor of metalloproteinases-4 (TIMP-4) regulates stemness in cervical cancer cells.
Sample Metadata Fields
Specimen part, Cell line
View Samples- Drosophila melanogaster
- 21 Downloadable Samples
- Affymetrix Drosophila Genome Array (drosgenome1)
Description
Larvae-Pupae transition flies (Drosophila) were recovered and transport for 3 days at 12-14ºC to arrest development until the launch site, then exposed to RT (18-20ºC) for some hours including the launch and trip to the International Space Station, then pupae were exposed to microgravity in the ISS for 4 days and a half at 22ºC. Finally pupae were fixed on acetone and frozen until recovery on Earth.<br></br><br></br><br></br><br></br>Four groups of samples: 1 ISS (+ground control) as described, 2 RPM (microgravity simulator on Earth) as described, 3 RPM without constrains (No MAMBA container and only 5 days exposure without cold transport) and 4 centrifuge 10g without constrains control..
Publication Title
No associated publication
Sample Metadata Fields
Treatment
View Samples