Yamanaka Factors - The Secret To Living Forever?
In a Nutshell
Yamanaka factors—four proteins discovered by Shinya Yamanaka—reset epigenetic markers on DNA, reversing cellular aging by turning mature cells youthful without full stem cell conversion, as shown in mice (equivalent to 250+ human years) with reversed wrinkles, blindness, and systemic rejuvenation. David Sinclair's company and Altos Labs ($10B funded) are in clinical trials for molecular cocktails targeting diseases like glaucoma and heart failure, aiming for systemic treatments to maintain youth indefinitely. Timeline: 10-20 years to longevity escape velocity; exercise and fasting currently improve epigenomes, with trials underway on human cells.
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Speaking of prospering, how far off are we from age reversal? That's one I'm most excited about. Have you looked at Yamanaka factors? David Sinclair's been on and is tangentially associated with it.
Every cell in our body has the same DNA, copied via mitosis from the womb to today. What makes an eye cell different from a skin cell, brain cell, tongue, or feet? Cells differ because genes in the DNA are on or off. These are molecular switches (epigenetic markers) that sit on DNA, blocking genes or allowing them to produce RNA copies turned into proteins.
Zeros and ones.
Each gene makes a unique protein; proteins are molecular machines constantly working in the cell, making cells different based on which genes are on or off.
Cell complexity: Imagine a cell the size of Manhattan with 500-story tall buildings; every person is a protein—10 billion people living there, going between buildings, up and down all day, building, breaking, working non-stop, having coffee, collaborating. That's one second in one cell, running for 80 years.
As we age, DNA gets damaged from radiation, sunlight, bad eating, alcohol. Cells fix DNA with repair proteins, but each fix risks moving epigenetic markers (ones and zeros). Over time, wrong genes turn on, right genes turn off, causing cells to malfunction: eye cells stop working properly, heart cells lose electrical cascade, skin cells wrinkle.
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