What is a 'cancer gene'? How genetic mutations lead to cancer

Medical Xpress

March 1, 2026

AI-Generated Deep Dive Summary

Cancer is a disease that affects millions globally, with an estimated 170,000 Australians diagnosed in 2025. While many know cancer has genetic roots, understanding how these changes occur is crucial to grasping its development. Genetic mutations can alter the function of genes, leading to uncontrolled cell growth and potentially forming cancerous tumors. These mutations can either be inherited or arise spontaneously, highlighting the complex interplay between genetics and disease. Cancer genes, such as oncogenes, are typically altered versions of normal genes that promote cell division. When functioning correctly, these genes help regulate cell growth and repair DNA damage. However, mutations can turn them into oncogenes, causing cells to grow uncontrollably. Conversely, tumor suppressor genes, which normally inhibit cancer development, can become nonfunctional due to mutations, allowing cancer progression. The role of inherited genetic mutations in cancer cannot be overlooked. For instance, mutations in BRCA1 and BRCA2 genes significantly increase the risk of breast and ovarian cancers, while mutations in TP53 are linked to Li-Fraumeni syndrome, a condition associated with various cancers. Identifying these genetic predispositions is vital for early detection and personalized treatment plans. Understanding cancer's genetic basis matters deeply to individuals concerned about their health. Knowing one’s family medical history can help identify potential risks, enabling proactive measures like regular screenings or preventive treatments. This knowledge also underscores the importance of genetic counseling and testing, empowering people to make informed decisions about their healthcare. Research into cancer genes not only advances treatment options but also offers hope for prevention. Targeted therapies that specifically address genetic mutations are increasingly effective in managing cancer. As science continues to unravel the complexities of cancer genetics, the potential for personalized medicine grows, offering tailored treatments based on an individual’s unique genetic profile.

Verticals

healthmedical

Originally published on Medical Xpress on 3/1/2026