Anti-Aging: University Of California Research Unveils Potential Way To Rejuvenate Tissues In The Old By Using Plasma Diluted With Saline And Albumin
: A new study by anti-aging researchers from the University of California-Berkeley shows that age-reversing effects can be achieved by simply diluting the blood plasma of old mice and transfusing the mixture back to them.
The team found that replacing half of the blood plasma of old mice with a mixture of saline and albumin, where the albumin simply replaces protein that was lost when the original blood plasma was removed has the same or stronger rejuvenation effects on the brain, liver and muscle than pairing with young mice or young blood exchange. Performing the same procedure on young mice had no detrimental effects on their health.
The study findings were published in the journal: Aging. https://www.aging-us.com/article/103418/text
This new discovery shifts the dominant model of rejuvenation away from young blood and toward the benefits of removing age-elevated, and potentially harmful, factors in old blood. (In 2005, the same team made the surprising discovery that making conjoined twins out of young and old mice such that they share blood and organs can rejuvenate tissues and reverse the signs of aging in the old mice. The finding sparked a flurry of research into whether a youngster's blood might contain special proteins or molecules that could serve as a "fountain of youth" for mice and humans alike.)
Dr Irina Conboy, a Professor of Bioengineering at University of California- Berkeley who is the first author of the 2005 mouse-joining paper and senior author of the new study told Thailand Medical News, "There are two main interpretations of our original experiments: The first is that, in the mouse joining experiments, rejuvenation was due to young blood and young proteins or factors that become diminished with aging, but an equally possible alternative is that, with age, you have an elevation of certain proteins in the blood that become detrimental, and these were removed or neutralized by the young partners. As our science shows, the second interpretation turns out to be correct. Young blood or factors are not needed for the rejuvenating effect; dilution of old blood is sufficient."
The composition of human blood plasma can be altered in a clinical procedure called therapeutic plasma exchange, or plasmapheresis, which is currently FDA-approved in the U.S. for treating a variety of autoimmune diseases. The research team is currently finalizing clinical trials to determine if a modified plasma exchange in humans could be used to improve the overall health of older people and to treat age-associated diseases that include muscle wasting, neuro-degeneration, Type 2 diabetes and immune deregulation.
Dr Dobri Kiprov, a medical director of Apheresis Care Group and a co-author of the paper said, "I think it will take some time for individuals to really give up the idea that that young plasma contains rejuvenation molecules, or silver bullets, for aging. I hope our results open the door for further research into using plasma exchange not just for aging, but also for immunomodulation."
Dr Conboy and her husband and research partner Dr Michael Conboy, a senior researcher and lecturer in the Department of Bioengineering at UC Berkeley and co-author o
f the new study, in the early 2000s had a hunch that our body's ability to regenerate damaged tissue remains with us into old age in the form of stem cells, but that somehow these cells get turned off through changes in our biochemistry as we age.
Dr Conboy added, "We had the idea that aging might be really more dynamic than people think. We thought that it could be caused by transient and very reversible declines in regeneration, such that, even if somebody is very old, the capacity to build new tissues in organs could be restored to young levels by basically replacing the broken cells and tissues with healthy ones, and that this capacity is regulated through specific chemicals which change with age in ways that become counterproductive."
Upon publishing their groundbreaking 2005 work, showing that making conjoined twins from the old mouse and a young mouse reversed many signs of aging in the older mouse, many researchers seized on the idea that specific proteins in young blood could be the key to unlocking the body's latent regeneration abilities.
In the original report however and in a more recent study, when blood was exchanged between young and old animals without physically joining them, young animals showed signs of aging. These results indicated that that young blood circulating through young veins could not compete with old blood.
From these observations, the Conboys pursued the idea that a buildup of certain proteins with age is the main inhibitor of tissue maintenance and repair, and that diluting these proteins with blood exchange could also be the mechanism behind the original results. If true, this would suggest an alternative, safer path to successful clinical intervention: Instead of adding proteins from young blood, which could do harm to a patient, the dilution of age-elevated proteins could be therapeutic, while also allowing for the increase of young proteins by removing factors that could suppress them.
In order to test this hypothesis, the Conboys and their colleagues came up with the idea of performing "neutral" blood exchange. Instead of exchanging the blood of a mouse with that of a younger or an older animal, they would simply dilute the blood plasma by swapping out part of the animal's blood plasma with a solution containing plasma's most basic ingredients: saline and a protein called albumin. The albumin included in the solution simply replenished this abundant protein, which is needed for overall biophysical and biochemical blood health and was lost when half the plasma was removed.
Dr Michael Conboy said, "We thought, What if we had some neutral age blood, some blood that was not young or not old? We'll do the exchange with that, and see if it still improves the old animal. That would mean that by diluting the bad stuff in the old blood, it made the animal better. And if the young animal got worse, then that would mean that that diluting the good stuff in the young animal made the young animal worse."
Upon finding that the neutral blood exchange significantly improved the health of old mice, the team conducted a proteomic analysis of the blood plasma of the animals to find out how the proteins in their blood changed following the procedure. The researchers performed a similar analysis on blood plasma from humans who had undergone therapeutic plasma exchange.
The researchers found that the plasma exchange process acts almost like a molecular reset button, lowering the concentrations of a number of pro-inflammatory proteins that become elevated with age, while allowing more beneficial proteins, like those that promote vascularization, to rebound in large numbers.
Dr Michael Conboy said, "A few of these proteins are of particular interest, and in the future, we may look at them as additional therapeutic and drug candidates. But I would warn against silver bullets. It is very unlikely that aging could be reversed by changes in any one protein. In our experiment, we found that we can do one procedure that is relatively simple and FDA-approved, yet it simultaneously changed levels of numerous proteins in the right direction."
The process of therapeutic plasma exchange in humans lasts about two to three hours and comes with no or mild side effects, said Dr Kiprov, who uses the procedure in his clinical practice. The research team is about to conduct clinical trials to better understand how therapeutic blood exchange might best be applied to treating human ailments of aging.
It is expected that most top and credible Wellness and Anti-Aging Centres will soon be making available this new anti-aging protocol.
For a list of credible anti-aging
centers and also qualified anti-aging doctors worldwide, contact us at Thailand Medical News.