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A new 3D culture system to identify disease-relevant genes in colorectal cancer

ABSTRACT: A new 3D culture system to identify disease-relevant genes in colorectal cancer

PROVIDER: PRJNA307082 | ENA |

REPOSITORIES: ENA

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A new 3D culture system to identify disease-relevant genes in colorectal cancer [Exome-Seq]

Project description:It is increasingly appreciated that properties of cultured epithelial cells differ dramatically in 2D compared to 3D, and the latter more faithfully recapitulates in vivo behavior. By studying a battery of human colorectal cancer (CRC) cell lines in type-1 collagen, we have found that HCA-7 cells form colonies with two distinctive and persistent morphological and functional properties. We observed predominantly single-layered polarized cysts (cystic colonies, CC) and a smaller fraction displaying disorganized solid masses (spiky colonies, SC) that were highly invasive in vivo. Despite overall genomic similarity, CC and SC exhibited distinct and dynamic patterns of gene expression in 3D.

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A new 3D culture system to identify disease-relevant genes in colorectal cancer

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

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Establishment and characterization of a 3D model culture system of primary human ovarian cells: Silk-Ovarioids

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Three-dimensional culture system identifies a new mode of cetuximab resistance and disease-relevant genes in colorectal cancer.

Project description:We previously reported that single cells from a human colorectal cancer (CRC) cell line (HCA-7) formed either hollow single-layered polarized cysts or solid spiky masses when plated in 3D in type-I collagen. To begin in-depth analyses into whether clonal cysts and spiky masses possessed divergent properties, individual colonies of each morphology were isolated and expanded. The lines thus derived faithfully retained their parental cystic and spiky morphologies and were termed CC (cystic) and SC (spiky), respectively. Although both CC and SC expressed EGF receptor (EGFR), the EGFR-neutralizing monoclonal antibody, cetuximab, strongly inhibited growth of CC, whereas SC was resistant to growth inhibition, and this was coupled to increased tyrosine phosphorylation of MET and RON. Addition of the dual MET/RON tyrosine kinase inhibitor, crizotinib, restored cetuximab sensitivity in SC. To further characterize these two lines, we performed comprehensive genomic and transcriptomic analysis of CC and SC in 3D. One of the most up-regulated genes in CC was the tumor suppressor 15-PGDH/HPGD, and the most up-regulated gene in SC was versican (VCAN) in 3D and xenografts. Analysis of a CRC tissue microarray showed that epithelial, but not stromal, VCAN staining strongly correlated with reduced survival, and combined epithelial VCAN and absent HPGD staining portended a poorer prognosis. Thus, with this 3D system, we have identified a mode of cetuximab resistance and a potential prognostic marker in CRC. As such, this represents a potentially powerful system to identify additional therapeutic strategies and disease-relevant genes in CRC and possibly other solid tumors.

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Project description:3D + LY vs. 3D culture of HUASMC

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Project description:Integrated Genomics Approach to Identify Biologically Relevant Alterations in Fewer Samples.

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