http://medicalxpress.com/ en-us Medical Xpress internet news portal provides the latest news on Health and Medicine. Sirtuins, proteins believed to significantly increase lifespan in a number of organisms – and the claimed target of some anti-ageing creams – do not, in fact, affect animal longevity, according to new research funded by the Wellcome Trust and the European Union. http://medicalxpress.com/news/2011-09-longevity-gene-nearing-life.html Medical research Wed, 21 Sep 2011 13:55:53 EST news235832033 In an age of spiraling inactivity levels and escalating obesity rates across the planet, a new collection of research articles focused on participation in sport and physical activity across the lifespan has just been released. http://medicalxpress.com/news/2011-08-physical-sport-traverses-lifespan.html Health Fri, 19 Aug 2011 12:39:55 EST news232976377 Constant bitterness can make a person ill, according to Concordia University researchers who have examined the relationship between failure, bitterness and quality of life. http://medicalxpress.com/news/2011-08-blaming-people-sick.html Psychology & Psychiatry Tue, 09 Aug 2011 10:50:01 EST news232105067 (Medical Xpress) -- Science may soon be able to more accurately predict how long a woman will remain fertile during her lifetime, thanks to research carried out at the University of St Andrews. http://medicalxpress.com/news/2011-08-chances-pregnancy-accurate.html Medical research Tue, 09 Aug 2011 04:00:01 EST news232080169 Where children live could determine their weight, chances of becoming crime victims and even lifespan, according to recent findings in the emerging field of “neighborhood effects.” http://medicalxpress.com/news/2011-08-psychologist-google-technology-neighborhood-effects.html Health Tue, 02 Aug 2011 10:10:01 EST news231498037 Whether we choose to accept or fight it, the fact is that we will all age, but will we do so successfully? Aging successfully has been linked with the "positivity effect", a biased tendency towards and preference for positive, emotionally gratifying experiences. New research published in Biological Psychiatry now explains how and when this effect works in the brain. http://medicalxpress.com/news/2011-07-secret-successful-aging.html Psychology & Psychiatry Thu, 14 Jul 2011 10:00:48 EST news229856357 (Medical Xpress) -- In a new study, Yale University researchers have identified a pathway by which reactive oxygen species (ROS) molecules, which are usually implicated in the aging process due to their damage to DNA, can also act as cellular signaling molecules that extend lifespan. The study, which provides insights into the underlying mechanisms of the ROS signaling process, is published in the June issue of Cell Metabolism. http://medicalxpress.com/news/2011-06-blamed-aging-ros-molecules-life.html Medical research Wed, 08 Jun 2011 05:16:41 EST news226728970 There is no longer any doubt that dietary restriction (DR) extends lifespan. Many studies have shown that limiting nutrient intake extends lifespan in yeast, worms, flies and as well as postponing age-related diseases in mice. However, scientists are still puzzling over the exact mechanism of DR, convinced its secrets are the key to new therapies for diseases such as Alzheimer's, Parkinson's and even cancer. Research involving the nematode C. elegans at the Buck Institute for Research on Aging sheds new light on a possible mechanism of DR – revealing that a group of lipid signaling molecules called N-acylethanolamines (NAEs) informs the animal of limited or ample nutrients and helps regulate the worm's aging response to changes in its diet. Some of these worm (NAE's) are similar to endocannabinoids in humans, where they regulate many different physiological processes including nutrient intake and energy balance. Thus the link between endocannabinoids, DR and aging could be conserved among species. The study appears in the May 12th edition of Nature. http://medicalxpress.com/news/2011-05-endocannabinoid-dietary-restriction-lifespan-extension.html Medical research Wed, 11 May 2011 13:00:16 EST news224337390