A Small Molecule NNMT Inhibitor Puts Aged Stem Cells Back to Work to Improve Muscle Regeneration in Old Mice

In old tissues, stem cell activity is much reduced relative to youthful activity. This is thought to be the most important contribution to loss of muscle mass and strength with age, leading to the condition known as sarcopenia. It also diminished the ability to regenerate after muscle injury. Numerous studies in the regenerative medicine community have demonstrated that while this loss of stem cell function may be a defense against cancer, reducing the activity of cells that may bear potentially dangerous molecular damage, there appears to be a fair amount of room to push the balance towards greater activity without large increases in cancer risk. In mice, anyway. Researchers here demonstrate a novel way of increasing muscle stem cell activity, to add to a number of others that have been shown to work to some degree in animal studies. The mechanism is arguably somewhat related to work on ways to increase levels of NAD+ so as to enhance mitochondrial activity in old tissues. Here the effect size on muscle regeneration in mice is certainly large enough to be interesting. We'll no doubt see what it does in humans fairly soon, even ahead of human trials, as the self-experimentation community decides to try this out. One would hope they would go about it more carefully than is usually the case in body building circles. Aging is accompanied by progressive declines in skeletal muscle mass and strength and impaired regenerative capacity, predisposing older adults to d...
Source: Fight Aging! - Category: Research Authors: Tags: Daily News Source Type: blogs