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Analysis of tumour gene expression from fibrosarcoma mouse model following Treg depletion

ABSTRACT: Experiment was designed to look at the differences in gene expression between mice which responded to Treg depletion and began to control tumour growth, mice which could not bring tumour growth under control, untreated mice and a lymp node comparison.

ORGANISM(S): Mus musculus

SUBMITTER: Alex Greenshields-Watson

PROVIDER: E-MTAB-9351 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Gene expression changes during resistance toward vascular endothelial growth factor receptor (VEGFR) tyrosine kinase inhibitor (TKI) therapy in renal cell carcinoma (RCC)

Project description:This study was performed to understand the gene expression changes that accompany treatment of renal cell carcinoma (RCC) with vascular endothelial growth factor receptor (VEGFR) tyrosine kinase inhibitor (TKI) therapy. Human RCC cell lines were implanted into the flanks of nude beige mice, allowed to reach 12mm in long axis, and then treated with TKIs (sunitinib or sorafenib). Tumors were excised at 2 timepoints (prior to any therapy and at the 20mm endpoint of the study) and gene expression analysis was performed. Sunitinb or sorafenib were administered to mice bearing either 786-O or A498 xenografts. Mice were sacrificed and tumors excised for RNA extraction at pretreatment size of 12mm, or at 20mm, the mandated maximum tumor size allowed at our institution.

2015-05-21 | E-GEOD-64052 | biostudies-arrayexpress

Single cell RNAseq of immune and stromal cells in murine lung cancer

Project description:Immune responses against tumor cells depend on T lymphocyte attraction and activity within the tumor microenvironment. Specialized immune-interacting fibroblasts, commonly referred to as fibroblastic reticular cells (FRC), form specialized niches in secondary lymphoid organs, originate from embryonic progenitors and foster T cell activation. FRCs have also been detected in tertiary lymphoid structures (TLS) in tumors, differentiating from cancer associated fibroblasts. However, the identity and differentiation of niche-forming cells that foster intra-tumoral T cell activity have remained elusive. Here, we employed single cell RNA-sequencing of EYFP+ fibroblasts and GP33/34-Tetramer+CD8+ T cells from experimental murine lung cancer and cell fate-mapping analysis, which revealed the ability of FRC subsets in lung tumors to differentiate from progenitors situated in mural and adventitial sites. Ablation of FRC progenitors in Tumor T cell environments (TTEs) of murine lungs led to reduced anti-tumor T cell activity and loss of tumor control during experimental coronavirus vector-based immunotherapy. Collectively, our study defines lung cancer-associated FRC niches and key processes involved in stromal-T cell interaction that could pave the way for improved cancer immunotherapy.

2024-11-19 | E-MTAB-13708 | biostudies-arrayexpress

Transcription profiling of human A549 induced tumours in mice treated with PCI-5002, PCI-5003, or control vehicle

Project description:We have demonstrated that water-soluble zinc ionophores can be administered to mice at relatively high doses and inhibit the growth of A549 lung cancer cells grown in xenograft models. Gene expression profiles of tumor specimens harvested from mice four hours after treatment confirmed that the activation of stress responsive genes occurs in vivo. These findings lead us to propose that the pharmacologic delivery of zinc to tumors using water solubilized ionophores is a potential approach to cancer therapy. Experiment Overall Design: 1.25 million A549 cells were injected subcutaneously/intramuscularly into the right hind flank of 6 week old CD-1 nude mice that had been irradiated with 4 Gy of total body irradiation from a 137Cs radiation source one day prior to tumor implantation. When the average size of tumors reached approximately 100 mm3, mice were randomized by tumor size to treatment groups, typically containing 6-8 mice per group. Tumor and body weight measurements were performed three times per week. Tumor volume was calculated using the equation V (mm3) = a x b2/2, where a is the largest diameter and b is the smallest diameter. No significant body weight loss was observed. To perform gene expression profiling, mice were treated intravenously with one dose (100 Î¼mol/kg) PCI-5002, PCI-5003, or control vehicle (4 mice per group) when the average A549 tumor size reached 500 mm3. After four hours, tumors were harvested and snap frozen immediately on dry ice. Tumor tissue was homogenized, and total RNA was isolated and subjected to analysis using Human Genome U133 Plus 2.0 Arrays as described above.

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The Id-RAP1 axis is essential for glioma maintenance and residency of glioma cells in the perivascular niche

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2013-04-30 | E-MTAB-1303 | biostudies-arrayexpress

Transcription profiling of human samples - synthesis and anticancer properties of water-soluble Zinc ionophore: cell culture and xenograft model (GEO Super Series)

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2008-06-15 | E-GEOD-6972 | biostudies-arrayexpress

Transcription profiling of nude mice tumor biopsies generated by the injection of mesenchymal stem cells (MSC)

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Transcription profiling of human A549 lung cancer cells and their isogenic mitochondrial DNA (mtDNA)-depleted rho zero counterparts grown in cell culture and as tumor xenografts in immune-deficient mice.

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2008-06-11 | E-GEOD-10957 | biostudies-arrayexpress

miR-125b: A Rheostat of Growth versus Stress-Induced MAPKs That Governs Stemness and OncomiR Addiction in Skin

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