Oncogene Amplification
Oncogene Amplification - Related Videos
03:07
Immortalizing Endothelial Cells via Retroviral Transduction of Viral Oncogenes
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2026
Source: McAllister, S. C., Hanson, R. S., et al. An In Vitro Model for Studying Cellular Transformation by Kaposi Sarcoma Herpesvirus. J. Vis. Exp.(2017)This video demonstrates retroviral transduction of primary endothelial cells with HPV16 E6/E7 oncogenes. The integrated oncogenes inactivate p53 and Rb tumor suppressors, extending cell lifespan. G418 selection enriches for transduced cells, yielding immortalized endothelial cultures suitable for transformation...
09:44
Rapid Amplification of cDNA Ends
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2023
Source: Pablo Sanchez Bosch2, Sean Corcoran2 and Katja Brückner1,2,3 1Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research 2Department of Cell and Tissue Biology, 3Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA, USA Rapid Amplification of cDNA Ends (RACE) is a technique that allows amplification of full-length cDNA from mRNA by extending to the 3’ or 5’ end, even without prior knowledge of the sequence (Frohman et al.,...
10:12
Protein Misfolding Cyclic Amplification of Prions
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Cited by 7 •
2012
Protein misfolding cyclic amplification (PMCA) is an in vitro assay for the study of prion conversion and strain and species barriers. It can also be used as a prion detection assay.
01:33
Cancer-Critical Genes I: Proto-oncogenes
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2023
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype. When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors. Such genes that act...
08:18
Focus Formation: A Cell-based Assay to Determine the Oncogenic Potential of a Gene
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Cited by 23 •
2014
The Focus Formation Assay provides a straightforward method to assess the transforming potential of a candidate oncogene.
FAQs
Several genomic routes can create oncogene amplification, including repeated DNA replication, rearrangements, and formation of extrachromosomal DNA elements. These routes increase the number of oncogene copies within tumor cells. The resulting amplification may be recognized as double minutes or homogeneously staining regions, linking the molecular change to visible chromosome-level patterns.
Increased copy number can intensify oncogene output because amplified genes often produce more RNA and protein. That excess gene activity can strengthen signaling pathways that support cell proliferation and survival, and in some contexts division. The important biological consequence is not only extra DNA, but also higher growth-promoting signaling that may contribute to cancer development and progression.
Double minutes and homogeneously staining regions are visible cellular patterns associated with amplified genomic regions. Their value is that they connect a molecular copy-number abnormality with a chromosome-level appearance in tumor cells. Recognizing these patterns can support characterization of the alteration and help relate genomic structure to the biology of the cancer.
Testing for oncogene amplification can help classify tumors and estimate prognosis. It also identifies a genomic feature that may support treatment selection, particularly when targeted therapy is being considered. In this way, laboratory detection connects a molecular alteration with clinical interpretation, rather than treating copy number as an isolated genetic observation.
Amplification can matter during targeted treatment decisions because increased oncogene activity may identify tumors in which a growth-promoting pathway is especially relevant. Measuring the alteration gives clinicians and researchers information about the tumor’s molecular features. That information can help guide therapies directed toward the cancer biology associated with the amplified oncogene.
Amplification may help explain resistance when cancer cells carrying the amplified alteration continue to expand. Continued growth connects the increased gene copy number with persistence of a tumor cell population during treatment. Examining this relationship can clarify how amplified cancer cells contribute to progression despite therapy and why resistance may emerge or be maintained.