DNA mutation is not always harmful; it is essential for a healthy immune system. A process called somatic hypermutation allows immune cells to reshuffle their DNA to create effective antibodies. Vaccines work by stimulating this mutation process, training the body to fight specific pathogens.
DNA is not static; it mutates throughout life. A common mutation in men is the loss of the Y chromosome in some cells. This phenomenon rises from affecting 3% of men at age 40 to 44% at age 70 and is linked to a higher risk for cancer and Alzheimer's disease.
Medical treatments can have intergenerational consequences. Researchers found that fathers treated with the chemotherapy drug cisplatin passed associated DNA mutations to their children through sperm. This raises concerns about the children's future cancer risk and highlights the importance of sperm banking before treatment.
A condition called Clonal Hematopoiesis of Indeterminate Potential (CHIP), where mutant blood cells accumulate, affects up to one in five people in their 70s. These cells trigger inflammation, which can double the risk of coronary heart disease and stroke, even in individuals with healthy lifestyles.
Dr. Florence Comette, a precision medicine doctor, used an Apple Watch and a continuous glucose monitor to discover her own health problem. She found that her inadequate deep sleep was triggering wild swings in blood glucose, causing unhealthy cravings and putting her at risk for diabetes.