Some presume the brain to be a static bundle of electric cables. They’re wrong! The brain is a power grid with myriad switches. Because of that distinction, genetic destiny becomes just a suggestion. The outcome is alterable by a master molecule called REST (Restrictive Element 1-Silencing Transcription Factor). While DNA acts as the factory-installed wiring schematic hidden behind the drywall of each cellular house (neuron), the brilliance of human nature lies in how the current is routed. The chief electrician of epigenetics, REST, doesn’t rewrite your DNA; instead, it dynamically controls the grid, deciding exactly which switches get thrown and which of the genes you already have get turned on or off. In a healthy brain, REST keeps things stable. It’s the foreman, ensuring the juice flows properly. But when a switch gets jammed open or fused shut, the entire electrical system can go haywire.
Consider one type of catastrophic meltdown: epilepsy. After a stroke or head injury, REST may glitch and switch off the genes that would otherwise calm an electrical storm. The result is a hyperexcitable brain where “seizures beget seizures.” But… 2024 research shows that if we use a blocker to stop REST from latching onto DNA right after an injury, we can prevent a one-time trauma from becoming lifelong epilepsy. Transiently blocking REST delays the first spontaneous seizure and reduces both the number and overall impact of later seizures. Epigenetic switch throwing can alter gene expression and dissipate the storm before the first cloud forms.
Then there’s the frigid fog of Alzheimer’s. In healthy brain aging, REST is a hero, switching off stress-related genes that exacerbate neural wear and tear. In an Alzheimer’s brain, on the other hand, the gatekeeper stumbles. REST slips out of the control room (cell nucleus), and harmful proteins are made by suddenly unbridled genes. Recent studies link this to a paucity of a REST helper enzyme called SIRT6. Without SIRT6, REST loses its oomph. When REST stays on duty, where it belongs, it can halt the cognitive slide without touching the underlying genetic code.
What does this mean for you? It means you aren’t a finished product. When doctors tell you to sleep, exercise, and manage stress, we aren’t giving feel-good advice. These are biological signals that help REST keep your grid humming along. REST simply helps you use the DNA you have more wisely. The fuse-box inside your skull has more potential than you know. Let’s keep it online.
Want to learn more? The Kindle version of my new book
THE BRAIN ETERNAL
Your Path to Lifelong Mental Resilience
is available for pre-order now.
Paperback and Hardcover out September 22
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