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Science 2 April 1993: Vol. 260. no. 5104, pp. 85 - 88 DOI: 10.1126/science.8465203
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Articles
Science, Vol 260, Issue 5104, 85-88
Copyright © 1993 by American Association for the Advancement of Science
Altered growth of human colon cancer cell lines disrupted at activated Ki-ras
S Shirasawa,
M Furuse,
N Yokoyama,
and
T Sasazuki
Department of Genetics, Kyushu University, Fukuoka, Japan.
Point mutations that activate the Ki-ras proto-oncogene are presented in about 50 percent of human colorectal tumors. To study the functional significance of these mutations, the activated Ki-ras genes in two human colon carcinoma cell lines, DLD-1 and HCT 116, were disrupted by homologous recombination. Compared with parental cells, cells disrupted at the activated Ki-ras gene were morphologically altered, lost the capacity for anchorage-independent growth, grew more slowly both in vitro and in nude mice, and showed reduced expression of c-myc. Thus, the activated Ki-ras gene plays a key role in colorectal tumorigenesis through altered cell differentiation and cell growth.
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- E. J. Bernhard, E. J. Stanbridge, S. Gupta, A. K. Gupta, D. Soto, V. J. Bakanauskas, G. J. Cerniglia, R. J. Muschel, and W. G. McKenna (2000)
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- Involvement of Deregulated Epiregulin Expression in Tumorigenesis in Vivo through Activated Ki-Ras Signaling Pathway in Human Colon Cancer Cells.
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- Influence of K-ras Activation on the Survival Responses of Caco-2 Cells to the Chemopreventive Agents Sulindac and Difluoromethylornithine.
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Cancer Epidemiol. Biomarkers Prev.
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- Targeting the Ras signaling pathway: a rational, mechanism-based treatment for hematologic malignancies?.
- C. W. M. Reuter, M. A. Morgan, and L. Bergmann (2000)
Blood
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- Regrowth of 5-Fluorouracil-treated Human Colon Cancer Cells Is Prevented by the Combination of Interferon {{gamma}}, Indomethacin, and Phenylbutyrate.
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- Suppression of cyclooxygenase-2 promoter-dependent transcriptional activity in colon cancer cells by chemopreventive agents with a resorcin-type structure.
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Carcinogenesis
21, 959-963
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- Mouse Mammary Tumor Virus-Ki-rasB Transgenic Mice Develop Mammary Carcinomas That Can Be Growth-inhibited by a Farnesyl:Protein Transferase Inhibitor.
- C. A. Omer, Z. Chen, R. E. Diehl, M. W. Conner, H. Y. Chen, M. E. Trumbauer, S. Gopal-Truter, G. Seeburger, H. Bhimnathwala, M. T. Abrams, et al. (2000)
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- Activated ras Prevents Downregulation of Bcl-XL Triggered by Detachment from the Extracellular Matrix: A Mechanism of ras-Induced Resistance to Anoikis in Intestinal Epithelial Cells.
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- Oncogenes and Tumor Angiogenesis: Differential Modes of Vascular Endothelial Growth Factor Up-Regulation in ras-transformed Epithelial Cells and Fibroblasts.
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- Combination Therapy with the Farnesyl Protein Transferase Inhibitor SCH66336 and SCH58500 (p53 Adenovirus) in Preclinical Cancer Models.
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- Ras Protein Farnesyltransferase: A Strategic Target for Anticancer Therapeutic Development.
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- Requirement of the MAP kinase cascade for cell cycle progression and differentiation of human intestinal cells.
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Am J Physiol Gastrointest Liver Physiol
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- Activated Ki-Ras Suppresses 12-O-Tetradecanoylphorbol-13-acetate-induced Activation of the c-Jun NH2-Terminal Kinase Pathway in Human Colon Cancer Cells.
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- T cell factor-activated transcription is not sufficient to induce anchorage-independent growth of epithelial cells expressing mutant beta -catenin.
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PNAS
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- p21WAF1/CIP1 Is Upregulated by the Geranylgeranyltransferase I Inhibitor GGTI-298 through a Transforming Growth Factor beta - and Sp1-Responsive Element: Involvement of the Small GTPase RhoA.
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- Elevated Expression of Ets2 or Distinct Portions of Ets2 Can Reverse Ras-mediated Cellular Transformation.
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- Impact of oncogenes in tumor angiogenesis: Mutant K-ras up-regulation of vascular endothelial growth factor/vascular permeability factor is necessary, but not sufficient for tumorigenicity of human colorectal carcinoma cells.
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PNAS
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- K- and N-Ras Are Geranylgeranylated in Cells Treated with Farnesyl Protein Transferase Inhibitors.
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- Ras Uses the Novel Tumor Suppressor RASSF1 as an Effector to Mediate Apoptosis.
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- Dual Growth Arrest Pathways in Astrocytes and Astrocytic Tumors in Response to Raf-1 Activation.
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- Bile Acid-induced Activation of Activator Protein-1 Requires Both Extracellular Signal-regulated Kinase and Protein Kinase C Signaling.
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