[Genetics and cancer: advances and perspectives]

Area of Science:

• Oncology
• Molecular Biology
• Genetics

Background:

• Cancer development involves oncogenes (stimulating cell division), antioncogenes (inhibiting cell division), and anti-apoptotic genes (blocking programmed cell death).
• Tumor progression often arises from the interplay of genetic alterations across these gene families.
• Familial cancer predispositions are frequently linked to mutations in antioncogenes or DNA repair genes, leading to accumulated somatic mutations.

Framework:

• Identifies key gene families involved in cancer: oncogenes, antioncogenes, and anti-apoptotic genes.
• Highlights the cooperative role of gene modifications in tumor progression.
• Explains how mutations in repair genes can lead to accumulated somatic mutations, increasing cancer risk.

Implementation:

• Focuses on the identification of recently discovered genes predisposing to familial breast and colon cancers.
• Discusses the implications of knowing these predisposition genes for disease prediction.
• Acknowledges current limitations in preventive strategies, primarily surgical intervention.

Implications:

• Genetic knowledge enables presymptomatic cancer prediction.
• Current preventive options for familial cancer are limited, often involving surgical procedures.
• Future research elucidating cancer predisposition mechanisms could lead to less aggressive preventive and curative treatments.