Unknown,Transcriptomics,Genomics,Proteomics

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Transcriptomic comparison of chemosensitive and chemoresistant cells


ABSTRACT: First, in a model of xenografts induced with HT-29 human colon cancer cells, we demonstrated that the transcription factor NF-kB was involved in the resistance to CPT-11. Then, from one tumor treated with CPT-11 plus a NF-kB inhibitor, we established a resistant cell line to CPT-11. The aim of this study was to compare the expression of genes involved in the signaling pathway of NF-kB between the sensitive and the resistant cell lines and to identify other genes (target or not of NF-kB) which the expression was modified when the resistant phenotype was acquired. Human colon cancer cells chemosensitive (HT-29) versus human colon cancer cells chemoresistant (RIV) in a dye-swap experiment.

ORGANISM(S): Homo sapiens

SUBMITTER: Kevin Lebrigand 

PROVIDER: E-GEOD-23433 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Calpain 2-dependent IκBα degradation mediates CPT-11 secondary resistance in colorectal cancer xenografts.

Fenouille Nina N   Grosso Sebastien S   Yunchao Su S   Mary Didier D   Pontier-Bres Rodolphe R   Imbert Véronique V   Czerucka Dorota D   Caroli-Bosc François-Xavier FX   Peyron Jean-François JF   Lagadec Patricia P  

The Journal of pathology 20120209 1


CPT-11 (irinotecan), the first-line chemotherapy for advanced stage colorectal cancer, remains inactive in about half of patients (primary chemoresistance) and almost all initial responders develop secondary resistance after several courses of treatment (8 months on average). Nude mice bearing HT-29 colon cancer xenografts were treated with CPT-11 and/or an NF-κB inhibitor for two courses. We confirm that NF-κB inhibition potentiated CPT-11 anti-tumoural effect after the first course of treatmen  ...[more]

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