While acknowledging that all the data we have is observational, and therefore "speculative," he maintained that "while it doesn't appear that overdoing exercise shortens longevity, it does appear to blunt the otherwise unrivaled improvements in life expectancy conferred by less extreme amounts of exercise".
While sleep problems left untreated may shorten longevity, improving sleep can have powerful positive health benefits.
Nonetheless, dLRCH deficient flies are female sterile, display shortened longevity and reduced resistance to extreme conditions.
Accelerated aging-like symptoms and shortened longevity were also observed in zebrafish expressing progerin/lamin A-Δ37 or even prelamin A. Our genetic model using zebrafish may thus facilitate a high-throughput approach to the search for novel therapeutics for human progeroid syndromes and laminopathies associated with nuclear-envelope abnormalities.
The first hints were obtained from genetically engineered mouse models that exhibited accelerated aging phenotypes and shortened longevity [ 5, 6].
Early life growth hormone treatment shortens longevity [ 200, 201] and instead antagonists of these hormones may extend life span, treat cancer and some age-related diseases [ 202- 206].
This enhanced p53 response may inhibit functionality of stem and progenitor cell compartments, leading to some of the tissue atrophies and dysfunctions that accompanied the premature aging and shortened longevity phenotypes.
Other vital processes such as decrease in ATP synthesis, increasing the chance to disease susceptibility (DS), proteostasis (PS), and protein misfolding (PM), in animals can lead to additional ROS production, thereby disturbing heir physiology and shortening their longevity.
Crucially, reintroduction of telomerase is able to rescue telomere shortening and longevity in the zebrafish model.
The growth arrest of cellular senescence is actually a tumor suppressor mechanism to resist tumorigenesis via shortening the longevity of cells and preventing cell proliferation.
