The researchers, from Wageningen University, were prompted to conduct the study by earlier reports that noted a decline in the immune systems of aging people and theorized that it could be linked to nutritional deficiencies or decreased physical activity.
Additional supporting information may be found in the online version of this article: Fig. S1 Characteristization of the analyzed model systems of aging.
However, many recent insights into genetic determinants of aging have been gained from studies with short-lived eukaryotic model systems of aging [for recent review, see (Partridge, 2009)], which, unlike human beings, are amenable to molecular genetic analysis in the laboratory.
Notably, admissions to the ICU due to severe CAP are rising, which is a multifactorial phenomenon, related not only to the compromised immune systems of aging populations but also to a trend toward recommending that such patients be treated in critical care settings.
The Nuer had no system of age grades apart from the original transition from boyhood to manhood, and there were no clearly defined activities assigned to each age set; a particular set advanced slowly to a position of acknowledged seniority as older sets died out.
Traditionally, Dinka cattle raiders were strictly organized under a system of age sets.
Chinese Internet giant Tencent has announced it's bringing in a new system of age checks to its video games which will be linked to a national public security database — in an effort to reliably identify minors so it can limit how long children can play its games.
This might also have im-plications for HSC transplantation: A child that receives an allogeneic transplant from an elderly donor will eventually have a hematopoietic system of age that exceeds the expected maximal age of humans.
The group includes people over 65, people with chronic diseases like diabetes and people with compromised immune systems, regardless of age.
