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Abstract:
Current concepts on oncogenes, "antioncogenes" and their role in tumorigenesis are presented. Normal functions of proto-oncogenes, mechanisms of their conversion to oncogenes and inactivation of "antioncogenes", effects of oncogenes in model systems in vitro and in vivo are considered. Special attention is paid to the nonrandom proto-oncogene and "antioncogene" alterations in human tumours and the possibilities of their use as diagnostic or prognostic criteria.
Insights
This study reviews oncogenes and antioncogenes, explaining their roles in cancer development. It highlights how alterations in these genes in human tumors may serve as diagnostic and prognostic markers.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Proto-oncogenes normally regulate cell growth and differentiation.
- Oncogenes result from mutations that lead to uncontrolled cell proliferation.
- Antioncogenes (tumor suppressor genes) normally inhibit cell growth; their inactivation contributes to tumorigenesis.
Purpose of the Study:
- To present current concepts on oncogenes and antioncogenes in tumorigenesis.
- To discuss the mechanisms of oncogene activation and antioncogene inactivation.
- To explore the diagnostic and prognostic potential of gene alterations in human tumors.
Main Methods:
- Review of current scientific literature on oncogenes and antioncogenes.
- Analysis of experimental data from in vitro and in vivo model systems.
- Examination of genetic alterations in human tumor samples.
Main Results:
- Proto-oncogenes can transform into oncogenes through various genetic alterations.
- Inactivation of antioncogenes is a critical step in tumor development.
- Specific proto-oncogene and antioncogene alterations are frequently observed in human cancers.
Conclusions:
- Proto-oncogene activation and antioncogene inactivation are fundamental mechanisms in cancer.
- Nonrandom alterations in these genes offer potential as biomarkers for cancer diagnosis and prognosis.