Epigenetics

Epigenetics refers to how gene expression is influenced by our environment, e.g., everything we breathe, eat and put on our skin, along with physical and mental trauma. These environmental inputs affect which genes turn on and off, and when they do this. External influences primarily work by triggering a cellular process called methylation that affects genetic function but doesn't change genetic structure.

Epigenetic changes are thought to be a part of numerous diseases, such as cancer, asthma and heart disease.

Gene on/off switch
Dr. Anthony Komaroff briefly discussed Epigenetics on November 10, 2016 on a Solve ME/CFS webinar. A gene can be normal and not mutated but it may not be turned on or off at the right time. Webinar with Dr. Anthony L. Komaroff @42:50

Learn more
Epigenetics - NOVA Science NOW Video 2007