A single mutation in a cell can initiate tumor growth, underscoring the pivotal role of DNA and genetics in cancer development. These small errors in the genetic code can prompt cells to grow too quickly. We will explore how these mutations occur and why some individuals inherit a higher risk for developing cancer.
What is cancer at the genetic level?
Cancer is a complex genetic disease characterized by the uncontrolled growth and division of cells. This aberrant behavior occurs when mutations disrupt the normal regulatory mechanisms of cell function. As a result, healthy cells can transform into malignant ones, leading to the formation of tumors and potentially spreading to other parts of the body.
“Genetic changes can lead to cancer if they alter the way your cells grow and spread. Most cancer-causing DNA changes occur in genes, which are sections of DNA that carry the instructions to make proteins or specialized RNA such as microRNA.”
Sourced From: National Cancer Institute. (2024, August 8) The Genetics of Cancer. Retrieved from: https://www.cancer.gov/about-cancer/causes-prevention/genetics#should-i-get-genetic-testing-for-cancer-risk
How mutations occur
Mutations occur when DNA in a cell is altered. These changes can result from errors during cell division, environmental influences like radiation or chemicals, or can be inherited from parents. Each of these factors contributes to the ongoing evolution of genetic material.
Genetic testing: What it looks like
Genetic testing looks for abnormalities or changes in the DNA. Once a cell has mutated, it will continue to mutate into a cancer cell. This is what genetic testing also looks for. Genetic testing isn’t only used to figure out family history with cancer, but also to catch cell mutations at the earliest stages, in most cases.
Why are some individuals at a higher risk of developing cancer?
There are several reasons why someone may be at a higher risk of developing cancer. Parents might have genetic changes that increase the likelihood of cancer mutations in their children. Additionally, an individual may engage in activities that raise their risk of cancer, or they may inherit a rare condition known as family cancer syndrome.
“A family cancer syndrome, also called a hereditary cancer syndrome, is a rare disorder in which family members have a higher-than-average risk of developing a certain type or types of cancer. Family cancer syndromes are caused by inherited genetic variants in certain cancer-related genes.”
–National Cancer Institute. (2024, August 8) The Genetics of Cancer. Retrieved from: https://www.cancer.gov/about-cancer/causes-prevention/genetics#should-i-get-genetic-testing-for-cancer-risk
Key Takeaways
Consider your family history when dealing with a cancer diagnosis. This might involve genetic testing, checking for the possibility of family cancer syndrome, or researching genetic changes to stay informed.
Sources Used:
National Cancer Institute. (2024, August 8) The Genetics of Cancer. Retrieved from: https://www.cancer.gov/about-cancer/causes-prevention/genetics#should-i-get-genetic-testing-for-cancer-risk
Cancer Research UK. (2023, October 10) Genes, DNA and Cancer. Retrieved from: https://www.cancerresearchuk.org/about-cancer/what-is-cancer/genes-dna-and-cancer
