This is a photo of LAKI 4F mice with Yamanaka factors with and without doxycycline, and long-lived WT mice with doxycycline (antibiotic) and Yamanaka factors. Look at the curve of the bend of the spine.
LAKI are fast-growing mice with a mutation in lamin A (LMNA). Long-living mice are given the same experience, but they are now only 12 months old, therefore, with an average life of 3 years and a maximum of 5 years now, the results can be expected in 2018-2019.
The article itself in Cell. For those who do not have access – use sci-hub.io – pirated scientific articles.
The experiment was conducted at the Salk Institute in La Jolla, Southern California by the Spaniard Balmont.
It all started in 2006, when the Japanese Yamanaki discovered 24 factors (now the main only 4 OSKM, with the help of which the experience was conducted) of de-differentiation or pluripotency of cells by the conversion of cells, for example skin, back into stem cells
] Then, in 2013, the German Horvaths found 353 epigenetic markers of human aging, according to which the chronological age of a person was determined with an accuracy of 1.5 years. For stem cells, this age was 0.
For those who are interested in: recently a scientist of Harvard and Moscow University Vadim Gladyshev, who received a megagrant, determined the same epigenetic biomarkers of the mouse’s biological age – popularly stated in the fightaging blog. This is very important for the accelerated development of new therapies or geroprotectors in mice.
And a little insider for dessert. Now the company Calico conducts an experiment on 1000 mice in the Stanford Jackson Lab divided into two groups – ordinary long-lived mice and the same mouse but on a starving diet prolonging the life of mice by a record 50% (and Only 5% according to the latest data on primates). When the experience is completed, Google’s spinoff hopes to establish biomarkers of the biological age of the mouse that are needed to speed up the development of therapies or geroprotectors.
A little insider from the article New Yorker Silicon Valley Quest For immortality translated into vc.ru – Ned David 49 from Unity Biotechnology, which received an investment of $ 116 million, mainly to fight cell-related cells last year, already went to Balmont in December two times and one in March – they plan new ones Experiments (with the budget of the entire Salk Institute only 117 million, so the startup for a radical extension of life here is very handy).
So it turned out that the process of zeroing is not binary (either stem, or not), but quite a gradual . And if the cage does not shy with horse doses of the Yamanaki cocktail, and give it only a sip, the epigenetic markers are not reset, but only roll back. The cell does not change its phenotype with the skin cell or heart, and remains (that is, unlike the pluripotent one, does not yet express the Nanog marker – this is for the nerds).
Thus, Balmont rolled back the epigenetic clock of mice in which In the genome were Yamanaka cassettes that were activated by doxycycline and prolonged the life of mice by 33% and median by 50%.
If laboratory mice were drinking water with doxycycline – but only two days a week – they lived more , Than thirty percent longer. In wild mice (only 12 months old) subjected to the same therapy, the muscles and pancreas were renewed.
Slides of Yuri Deygin’s speech at the Scientific Environment in the Library named after I. Brothers Grimm. Novovagankovsky Lane 22.
This is the survival schedule for LAKI 4F mice without Yamanaka factors and with Yamanaka factors, without doxycycline, with doxycycline.
Critical markers of aging decreased:
– markers of the senescent cells p16Ink4a and beta galactoidiasis
– a marker of double-stranded DNA breaks of gamma-H2AX
– marker of anti-cancer protein p53
– Mettaloprotease
– interleukin-6
– mitochondrial active oxygen species
Telomeres were extended (according to the experience of M. Blasko delivered in Barcelona on the same LAKI)
Let me remind you that Balmont conducted the experiment not in the most optimal way (but experience is the son of difficult mistakes) – he derived a transgenic line of mice with Yamanaka OSKM genes, Which included transcription of these genes with the use of doxycycline (antibiotic) twice a week in a row after which they rested for 5 days.
As seen from the graph below, if doxycycline is given not 2 but 3 days, then the mice are already starting To die, with what on the 5th day of therapy the half is dying:
Now it remains to find the optimal proportions and timings for these factors, as well as the delivery method and dosage regimen that can prolong the life of mice much longer.
A simple overview of the discovery of Balmont in the journal Science.
This experience on the person needs AAB viral carrier with the factors of Yamanaki. As suggested by Yuri Deigin, one can simplify the experience and make the AAB confined exclusively to the hypothalamus (well, or the pineal body) and other modifiers of brain development and aging. It is also promising not to allow the body to carry out an epigenetic shift at all, but the experience that proves such an opportunity is still unknown.
Meanwhile, the Open Longevity patient’s site of the Science Foundation for Life Extension was opened
A clinical trial of geroprotectors is coming, while specialists offer a combination of sartans + statins, but the site is indifferent to any therapies, including the intake of such future geroprotectors as magnesium, NAC-N-acetyl-L-cysteine, glycine, ginkgo biloba (GinkGo Leaf)
It is possible to download blood tests for biomarkers of aging by selected specialists.
This data will then indicate your biological age, and there will also be open data with the possibility of cross-comparison and any research on these biomarkers of people from 20 to 70 years old.
Below 7 hour video lectures from the meeting on November 26 in the TechnoHab Klyuch. Moscow. Three-year-old manufacture.
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→ The most complete database of geroprotectors for model organisms.
→ You can independently pass the epigenetic markers and calculate the age according to the epigenetic clock of Horvath.
The cocktail of Yamanaki prolonged life to mice by 50% / Geektimes
