Senolytics in Aging Muscle: Could the Cure Be Worse than the Disease?

Skeletal muscles are organized into long fibers, and when a fiber breaks the entire fiber is often lost. This made a supporter worry that senolytic therapies might break a muscle fiber and eliminate precious fibers in aging muscles. It appears that the injury at the heart of the questioner’s worry does not happen in practice.

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More Studies on Metformin and Survival

In this update, we review two recent papers that address the question of people with type 2 diabetes who take metformin living longer than people without the disease who don’t, but without the flaw in the 2014 study. We find that, as expected, metformin is a good diabetes drug but shows no sign of being a longevity therapeutic.

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Kneecapped by Aging: New and Scrutinized Science Suggests Why the UNITY Osteoarthritis Trial Failed

UNITY Biotechnology was the first senolytic startup out of the gate, and the failure of its Phase II trial in osteoarthritis was a crushing disappointment. A careful look back at the underlying science and three new scientific papers give us a good idea why and suggest ways to move forward.

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A TAME Attempt to Slow Aging Part 5: Winning the Game with a Weak Hand

Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In the final installment of this 5-part series, we look at TAME itself: how it’s structured, how it’s justified, and how the results could impact the push for longevity therapeutics.

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A TAME Attempt to Slow Aging Part 4: Mixed Messages on Metformin and the Mind

Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In Part 4 of this 5-part series, we look at human data on metformin and neurodegenerative aging diseases.

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A TAME Attempt to Slow Aging Part 3: Metastasizing Errors: Human Trials of Metformin to Prevent and Treat Cancer

Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In Part 3 of this 5-part series, we look at human trials of metformin in prevention and treatment of cancer.

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A TAME Attempt to Slow Aging Part 2: Human Studies on Survival and Risk of Diabetes

Metformin has been proposed as an “anti-aging drug,” and scientists are organizing TAME, a major clinical trial to test the idea. In Part 2 of this 5-part series, we look at some of the human studies on metformin, including a flawed observational study that created the illusion that diabetics on metformin actually live longer than people without diabetes.

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Parabiosis: the Dilution Solution?

In heterochronic parabiosis, joining the circulatory systems of young and old mice causes the older animal to recover some features of youth. The effect has been widely assumed to be driven by pro-youth factors in younger blood, but an alternative hypothesis is possible: that the procedure is instead diluting pro-aging factors in the older partner.

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