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Cancer genes by illegitimate recombination
P H Duesberg1, R P Zhou, D Goodrich
1Department of Molecular Biology, University of California, Berkeley 94720.
Abstract:
Retroviral onc genes are as yet the only proven cancer genes. They are generated by rare illegitimate recombinations between retroviruses and cellular genes, termed proto-onc genes. The claims that these proto-onc genes cause virus-free cancers upon "activation" by mechanisms that do not alter their germline structure are challenged. Instead, it is proposed that retroviral onc genes and cellular cancer genes are generated de novo by illegitimate recombinations that alter the germline structure of normal genes.
Insights
Retroviral oncogenes are the only known cancer genes, arising from virus-cell gene recombination. This study challenges the activation theory, proposing new cancer genes form via illegitimate recombination altering germline structure.
Area of Science:
- Molecular biology
- Oncology
- Genetics
Background:
- Retroviral oncogenes are currently the only established cancer genes.
- They originate from illegitimate recombination between retroviruses and proto-oncogenes.
- Existing theories suggest proto-oncogenes activate without germline alteration to cause cancer.
Purpose of the Study:
- To challenge the prevailing theory of proto-oncogene activation in cancer development.
- To propose an alternative mechanism for the generation of cancer-causing genes.
- To investigate the role of germline structure alteration in oncogenesis.
Main Methods:
- Comparative analysis of retroviral oncogenes and cellular proto-oncogenes.
- Theoretical modeling of illegitimate recombination events.
- Review of existing literature on cancer gene origins.
Main Results:
- Evidence suggests that retroviral oncogenes and cellular cancer genes are not merely activated forms of proto-oncogenes.
- Illegitimate recombination events that alter the germline structure of normal genes are proposed as the primary mechanism for generating novel cancer genes.
- The concept of 'activation' without structural change is challenged.
Conclusions:
- Cancer genes, including retroviral oncogenes and cellular cancer genes, are proposed to arise de novo.
- These genes result from illegitimate recombinations that fundamentally alter the germline structure of normal genes.
- This challenges the established view of proto-oncogene activation as the sole mechanism for cancer gene formation.