Fight Aging! Newsletter, April 25th 2016
This study offers one useful data point, as the authors describe a genetic alteration that can boost the supply of new immune cells in old mice. The decline in that supply with age is one of the factors leading to poor immune function - and that means more than just vulnerability to infections, as the immune system is also responsible for destroying potentially cancerous and senescent cells, as well as clearing out forms of damaged proteins and unwanted metabolic waste. Various possibilities for increasing the number of new immune cells already exist in principle, such as regenerating the thymus, or cell therapies in which a patient's immune cells are grown outside the body and regularly infused, but this genetic approach is a new discovery.
There's no other age group suffering more from infectious diseases than seniors. With growing age, the risk of chronic and cute infections increases. This is due to the diminishing potential of hematopoietic stem cells (HSC) to build blood and immune cells in an appropriate number. In particular, HSC's capability to build lymphocytes is strongly declining, which leads to imbalances in blood cell composition and, thus, to immune defects limiting overall fitness and organismal survival during aging. There is experimental evidence that the accumulation of DNA damage contributes to these aging-induced immune impairments. Researchers identified gene Per2 as a genetic switch for a better immune system in mice: Per2 gene deletion amelio...
Source: Fight Aging! - Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
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