A recent theory of aging says that caloric restriction
may do the trick but the research is inconsistent; the mice in the most promising studies were weaned that way, something unlikely to happen in human children. New research says even those studies may not be entirely accurate and that for lean mice – and therefore lean humans, if prior mouse studies were to be taken at face value – caloric restrictions as an anti-aging strategy may be a pointless, frustrating and even dangerous exercise.
But for fat mice, dieting makes sense and will extend life, the researchers say. That goes for people as well.
Women appear to suffer more from rheumatoid arthritis (RA) than men, according to research published in Arthritis Research and Therapy.
John Hawks reviews an article by Roni Caryn Rabin on the connection with glucose metabolism and age related cognitive decline.
The original authors made clear that we remember:
Previous observational studies have shown that physical activity reduces the risk of cognitive decline, and studies have also found that diabetes increases the risk of dementia. Earlier studies had also found a link between Type 2 diabetes and dysfunction in the dentate gyrus.
The Centers for Disease Control and Prevention and the American College of Sports Medicine recommends at least 30 minutes of moderate-intensity physical activity on most days of the week in order to maintain and improve optimal health. This recommendation is especially important for older Americans, who can be less likely to fulfill this requirement, yet are more at risk for chronic diseases associated with aging.
London's Daily Telegraph features a great article
that reads like a country music song - old couple, still in love after all these years, old guy still wants to express his love, old lady gets scared and calls the cops, family gets involved.
Here's the headline: "Wife calls police to restrain 82-year-old on Viagra."
Here's the subhead: "A woman had to call police to fend off the attentions of her amorous 82-year-old husband after he took Viagra, fearing that he might die of 'passion.'"
Researchers have discovered that DNA damage decreases a cell's ability to regulate which genes are turned on and off in particular settings. This mechanism, which applies both to fungus and to us, might represent a universal culprit for aging.
"This is the first potentially fundamental, root cause of aging that we've found," says Harvard Medical School professor of pathology David Sinclair. "There may very well be others, but our finding that aging in a simple yeast cell is directly relevant to aging in mammals comes as a surprise."
Their findings appear in the November 28 issue of the journal Cell.
Older people who spent at least 14 hours a week taking care of a disabled spouse lived longer than others. That is the unexpected finding of a University of Michigan study forthcoming in Psychological Science, a journal of the Association for Psychological Science.
The study supports earlier research showing that in terms of health and longevity, it really is better to give than to receive.
Determining chronological age is easy - count forward from birth. Establishing physiological age, especially in humans, is purely subjective because it's based on how someone looks or functions. Research in nematode worms could lead to the development of human biomarkers for aging, allowing us to track how we're withstanding the tests of time.
Scientists at the Buck Institute for Age Research say they have identified for the first time these biomarkers of aging which are highly predictive of both chronological and physiological age. Biomarkers are biochemical features that can be used to measure the progress of disease or the effects of treatment.
In the November 15th issue of Genes&Development, Dr. Kenneth Dorshkind and colleagues at the David Geffen School of Medicine (UCLA) have identified two genes – p16(Ink4a) and Arf – that sensitize lymphoid progenitor cells to the effects of aging, and confer resistance to leukemogenesis.
Hematopoiesis (the development of blood cells) entails two main pathways: myelopoiesis (the formation of the red and white myeloid cells) and lymphopoiesis (the formation of B- and T-cells). While myelopoiesis remains constant throughout life, lymphopoiesis declines with age.
Maybe you have an 85-year-old grandfather who still whips through the newspaper crossword puzzle every morning or a 94-year-old aunt who never forgets a name or a face. They don't seem to suffer the ravages of memory that beset most people as they age. Researchers at Northwestern University's Feinberg School of Medicine wondered if the brains of the elderly with still laser sharp memory -- called "super aged" -- were somehow different than everyone else's.
So instead of the usual approach in which scientists explore what goes wrong in a brain when older people lose their memory they investigated what goes right in an aging brain that stays nimble.
Here's the preliminary answer: