A short-term colorectal cancer sphere culture as a relevant tool for human cancer biology investigation

Background: Ex vivo colospheres have been previously characterised as a colorectal cancer (CRC) well-rounded multicellular model, exclusively formed by carcinoma cells, and derived from fresh CRC tissue after mechanical dissociation. The ability to form colospheres was correlated with tumour aggress...

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Veröffentlicht in:British journal of cancer 2013-04, Vol.108 (8), p.1720-1731
Hauptverfasser: Weiswald, L-B, Richon, S, Massonnet, G, Guinebretière, J-M, Vacher, S, Laurendeau, I, Cottu, P, Marangoni, E, Nemati, F, Validire, P, Bellet, D, Bièche, I, Dangles-Marie, V
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container_end_page 1731
container_issue 8
container_start_page 1720
container_title British journal of cancer
container_volume 108
creator Weiswald, L-B
Richon, S
Massonnet, G
Guinebretière, J-M
Vacher, S
Laurendeau, I
Cottu, P
Marangoni, E
Nemati, F
Validire, P
Bellet, D
Bièche, I
Dangles-Marie, V
description Background: Ex vivo colospheres have been previously characterised as a colorectal cancer (CRC) well-rounded multicellular model, exclusively formed by carcinoma cells, and derived from fresh CRC tissue after mechanical dissociation. The ability to form colospheres was correlated with tumour aggressiveness. Their three-dimensional conformation prompted us to further investigate their potential interest as a preclinical cancer tool. Methods: Patient-derived CRC xenografts were used to produce numerous colospheres. Mechanism of formation was elucidated by confocal microscopy. Expression analysis of a panel of 64 selected cancer-related genes by real-time qRT–PCR and hierarchical clustering allowed comparison of colospheres with parent xenografts. In vitro and in vivo assays were performed for migration and chemosensitivity studies. Results: Colospheres, formed by tissue remodelling and compaction, remained viable several weeks in floating conditions, escaping anoikis through their strong cell–cell interactions. Colospheres matched the gene expression profile of the parent xenograft tissue. Colosphere-forming cells migrated in collagen I matrix and metastasised when subrenally implanted in nude mice. Besides, the colosphere responses to 5-fluorouracil and irinotecan, two standard drugs in CRC, reproduced those of the in vivo original xenografts. Conclusion: Colospheres closely mimic biological characteristics of in vivo CRC tumours. Consequently, they would be relevant ex vivo CRC models.
doi_str_mv 10.1038/bjc.2013.132
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The ability to form colospheres was correlated with tumour aggressiveness. Their three-dimensional conformation prompted us to further investigate their potential interest as a preclinical cancer tool. Methods: Patient-derived CRC xenografts were used to produce numerous colospheres. Mechanism of formation was elucidated by confocal microscopy. Expression analysis of a panel of 64 selected cancer-related genes by real-time qRT–PCR and hierarchical clustering allowed comparison of colospheres with parent xenografts. In vitro and in vivo assays were performed for migration and chemosensitivity studies. Results: Colospheres, formed by tissue remodelling and compaction, remained viable several weeks in floating conditions, escaping anoikis through their strong cell–cell interactions. Colospheres matched the gene expression profile of the parent xenograft tissue. Colosphere-forming cells migrated in collagen I matrix and metastasised when subrenally implanted in nude mice. Besides, the colosphere responses to 5-fluorouracil and irinotecan, two standard drugs in CRC, reproduced those of the in vivo original xenografts. Conclusion: Colospheres closely mimic biological characteristics of in vivo CRC tumours. 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Abdomen ; Gene expression ; Humans ; Medical sciences ; Metastasis ; Mice ; Mice, Nude ; Mice, SCID ; Microscopy, Confocal ; Molecular Diagnostics ; Molecular Medicine ; Multiple tumors. Solid tumors. Tumors in childhood (general aspects) ; Neoplasm Transplantation ; Oncology ; Random Allocation ; Real-Time Polymerase Chain Reaction ; Spheroids, Cellular - pathology ; Stomach. Duodenum. Small intestine. Colon. Rectum. 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The ability to form colospheres was correlated with tumour aggressiveness. Their three-dimensional conformation prompted us to further investigate their potential interest as a preclinical cancer tool. Methods: Patient-derived CRC xenografts were used to produce numerous colospheres. Mechanism of formation was elucidated by confocal microscopy. Expression analysis of a panel of 64 selected cancer-related genes by real-time qRT–PCR and hierarchical clustering allowed comparison of colospheres with parent xenografts. In vitro and in vivo assays were performed for migration and chemosensitivity studies. Results: Colospheres, formed by tissue remodelling and compaction, remained viable several weeks in floating conditions, escaping anoikis through their strong cell–cell interactions. Colospheres matched the gene expression profile of the parent xenograft tissue. Colosphere-forming cells migrated in collagen I matrix and metastasised when subrenally implanted in nude mice. 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subjects 631/67/70
692/308
692/699/67/1504/1885
Animals
Biological and medical sciences
Biomedical and Life Sciences
Biomedicine
Camptothecin - analogs & derivatives
Camptothecin - pharmacology
Cancer Research
Cancer therapies
Cell Line, Tumor
Cell Movement - physiology
Cell Survival - physiology
Colorectal cancer
Colorectal Neoplasms - drug therapy
Colorectal Neoplasms - genetics
Colorectal Neoplasms - pathology
Drug Resistance
Drug Screening Assays, Antitumor
Epidemiology
Female
Fluorouracil - pharmacology
Gastroenterology. Liver. Pancreas. Abdomen
Gene expression
Humans
Medical sciences
Metastasis
Mice
Mice, Nude
Mice, SCID
Microscopy, Confocal
Molecular Diagnostics
Molecular Medicine
Multiple tumors. Solid tumors. Tumors in childhood (general aspects)
Neoplasm Transplantation
Oncology
Random Allocation
Real-Time Polymerase Chain Reaction
Spheroids, Cellular - pathology
Stomach. Duodenum. Small intestine. Colon. Rectum. Anus
Transplantation, Heterologous
Tumors
Xenograft Model Antitumor Assays
title A short-term colorectal cancer sphere culture as a relevant tool for human cancer biology investigation
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