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Gene signature predictive of response to chemotherapy in mCRC [RT-PCR]

ABSTRACT: The objective is to generate a robust and validated predictor profile for chemotherapy response in patients with mCRC using microarray gene expression profiles of primary colorectal cancer tissue.

ORGANISM(S): Homo sapiens

PROVIDER: GSE52513 | GEO | 2013/11/20

SECONDARY ACCESSION(S): PRJNA229147

REPOSITORIES: GEO

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Gene signature predictive of response to chemotherapy in mCRC [RT-PCR]

Project description:The objective is to generate a robust and validated predictor profile for chemotherapy response in patients with mCRC using microarray gene expression profiles of primary colorectal cancer tissue. To define a gene signature of response to chemotherapy in metastatic colorectal cancer, samples were obtained from 40 patients from Marques de Valdecilla Hospital who underwent primary surgery. Gene expression was detected and quantified using the Human Whole Genome U133 Plus 2.0 array (Affymetrix), containing 54675 human gene probes. The validation set consisted of 119 samples from Hospital Virgen del Rocio, Seville, Spain; Hospital Virgen de la Victoria, Malaga, Spain; Hospital de la Merced, Osuna, Spain and Hospital MarquM-CM-)s de Valdecilla, Santander, Spain, and included 86 tumor samples (40 coming from the training set and 46 from newly treated CRC patients) and 33 normal tissue samples of CRC patients used as controls. Custom-designed TaqManM-BM-. Low Density Arrays (TLDA) 7900 HT Micro Fluidic Cards including the 161 genes selected for validation were run and analyzed by the ABI PRISMM-BM-. 7900HT Sequence Detection System (SDS 2.2, Applied Biosystems) according to manufacturer's protocol (Applied Biosystems). Expression of target miRNAs was normalized in relation to the expression of GAPDH. Cycle threshold (Ct) values were calculated using the SDS software v.4.2 using automatic baseline settings and a threshold of 0.2. Relative quantification of gene expression was calculated by the 2M-bM-^HM-^RM-NM-^TCt method (Applied Biosystems user bulletin no. 2 (P/N 4303859)). This submission represents the RT-PCR component of the study only

2013-11-20 | E-GEOD-52513 | biostudies-arrayexpress

Gene signature predictive of response to chemotherapy in mCRC [array]

2013-12-01 | GSE52735 | GEO

Gene signature predictive of response to chemotherapy in mCRC [array]

2013-12-01 | E-GEOD-52735 | biostudies-arrayexpress

Gene signature predictive of response to chemotherapy in mCRC

Project description:This SuperSeries is composed of the SubSeries listed below.

2013-12-01 | GSE52847 | GEO

Gene signature predictive of response to chemotherapy in mCRC

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

2013-12-01 | E-GEOD-52847 | biostudies-arrayexpress

Whole genome copy number profiles of FFPE samples from patients with metasatic colorectal cancer (mCRC)

Project description:Metastatic colorectal cancer (mCRC) is associated with multiple somatic copy number alterations (SCNAs). We analyzed SCNAs to estimate overall survival (OS) and progression free suvival (PFS) for mCRC patients treated with bevacizumab in combination with oxaliplatin or irinotecan.

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T-cell receptor repertoire in metastatic colorectal cancer during chemotherapy

Project description:In this study, we aimed to determine the characteristics and clinical significance of the TCR repertoire in patients with unresectable metastatic colorectal cancer (mCRC).

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MicroRNA signature predict chemotherapy response in patients with advanced colorectal cancer

Project description:The aim of our study was to evaluate the ability of miRNA expression patterns to predict chemotherapy response in a cohort of 39 patients with metastatic colorectal carcinoma

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Genomic predictor of response and survival following neoadjuvant taxane-anthracycline chemotherapy in breast cancer

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First-line durvalumab and tremelimumab with chemotherapy in RAS-mutated metastatic colorectal cancer: a phase 1b/2 trial [RNA-Seq]

Project description:While patients with microsatellite instable, metastatic colorectal cancer (CRC) benefit from immune checkpoint blockade, chemotherapy with targeted therapies remains the only therapeutic option for microsatellite stable (MSS) tumors. The single arm, phase IB/II MEDITREME trial evaluates safety and efficacy of durvalumab plus tremelimumab in combination with mFOLFOX6 chemotherapy in first line, in 57 patients with RAS-mutant unresectable mCRC. Safety was primary objective of phase IB and no safety issue was observed. The primary objective of phase II was efficacy in terms of 3-month PFS in MSS patients, which was met with a 3 month PFS of 90.7% [95% CI: 79.2-96%]. For secondary objective, response rate was 64.5%, median PFS was 8.2 months [95% CI: 5.9–8.6] and overall survival was not reached in MSS patients. Higher tumor mutational burden and a lower degree of genomic instability in responder patients. Integrated transcriptomic analysis underlined that high immune signature, and low epithelio-mesenchymal transition were associated with better outcome. Immunomonitoring showed induction of neoantigen and NY-ESO1 and TERT blood tumor specific T cell response associated with better PFS. The combination of durvalumab-tremelimumab with mFOLFOX6 was tolerable with promising clinical activity in MSS mCRC.

2023-07-05 | GSE235919 | GEO

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