Proto Oncogenes
Proto Oncogenes - Related Videos
01:33
Cancer-Critical Genes I: Proto-oncogenes
0 Views •
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...
01:33
Cancer-Critical Genes I: Proto-oncogenes
0 Views •
2021
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...
03:07
Immortalizing Endothelial Cells via Retroviral Transduction of Viral Oncogenes
0 Views •
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...
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.
09:58
Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
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Cited by 30 •
2020
Intrinsically disordered domains are important for oncogenic fusion transcription factor function. To therapeutically target these proteins, a more detailed understanding of the regulatory mechanisms employed by these domains is required. Here, we use transcriptomics to map important structural features of the intrinsically disordered EWS domain in Ewing sarcoma.
FAQs
These changes can abnormally activate a proto-oncogene rather than simply preserving its normal growth-regulating role. Mutations may alter the gene’s activity, amplification can increase its contribution to signaling, and chromosomal rearrangements can change how it functions or is controlled. The resulting abnormal signal may promote excessive cell division and contribute to tumor initiation.
Proto-oncogenes can encode growth factors, cell-surface receptors, intracellular signaling proteins, or transcription factors. These components act at different points in the communication pathway that links external growth signals to gene expression and cell-cycle control. Their positions help explain how abnormal activation can influence several stages of cellular regulation and produce effects on proliferation, differentiation, or survival.
In healthy tissue, activity from these genes supports regulated growth, division, differentiation, and survival. After abnormal activation, the same growth-related signaling capacity can become a driver of uncontrolled proliferation. This distinction is important because the gene itself is not inherently cancer-causing in its normal state; its altered activity connects the regulatory system to tumor development.
Analysis of these genes can help researchers investigate how tumors begin and how they progress. Because proto-oncogene products participate in growth-signaling pathways, abnormal activation provides a molecular link between altered regulation and cancer-associated cell behavior. This perspective supports efforts to identify changes that are relevant to tumor biology rather than viewing cancer only as a disorder of tissue growth.
Changes involving mutation, amplification, or chromosomal rearrangement can provide molecular information about abnormal growth signaling in a tumor. Researchers can study these alterations as potential biomarkers, meaning measurable molecular features that help characterize disease biology. Such markers may connect a tumor’s observed behavior with the signaling pathways involved in its initiation or progression.
Their products occupy key positions in pathways that regulate cell growth and survival, so abnormal activation can create specific signaling points for therapeutic intervention. Researchers use this knowledge to develop targeted therapies designed to interrupt relevant growth-signaling pathways. The goal is to address the molecular drivers associated with a tumor rather than focusing only on its visible cellular effects.