Tag: "aging" at biology news
Health care rationing in Germany
...ity. It has generally been assumed that population aging
leads to increasing health expenditures. Data usually exhibit a linear increase in health care expenditures with age. But studies from scientists in the U.S.A question this assumption. For example, Lubitz and colleagues from the American Health Care ...
Mole-rat Methuselahs push evolutionary theory of aging
...anation for the difference: "Most people attribute aging
solely to wear-and-tear on individuals' bodies. We... organism, which means there is no single gene for aging
or for youth. "Senescence theory," says Sherman, "tells us why the fountain of youth still eludes us...
Estrogen linked to more efficient regulation of a woman's heartbeat
...r activity differs between women and men. Because aging
may be a major determinate of heart rate dynamics,...the researchers systemically studied the effect of aging
on nonlinear properties and on gender-related differences. The results were then compared with stand...
Even in middle age, cutting calories slows aging of the heart
...s like caloric restriction just retarded the whole aging
process in the heart," said Prolla whose group emp...he first global analysis of gene expression in the aging
heart. Results from the PNAS study, conducted by Prolla and Weindruch with colleagues Cheol-Koo Lee...
Experimental 'gene switch' increases lifespan with no ill effects
... without the drawbacks." A decade of research on aging
and related processes has shown that daf-2 gene ac...n a strategy -- still unproven -- to stave off the aging
effects of oxidative damage....
Rutgers and Albert Einstein College of Medicine researchers seek fountain of youth among the worms
...lity that decline of one tissue type may drive the aging
of the entire organism. Sarcopenia, Driscoll and Hall point out, is also characteristic of aging
in humans and the researchers were somewhat surprised to see its effects in the worms. Their observ...
Disease-causing genetic mutations in sperm increase with men's age
...nd represents a fundamental difference between how aging
egg and sperm can impact the health of a child. "In the men we studied, these mutations had not been inherited, but rather collected over time in the reservoir of primitive cells that become sperm," says first author Rivka Glaser, a graduate student ...
The role of obesity and calories in cancer prevention
...tant role in regulating aspects of development and aging
such as bone density). "These observations suggest that efforts to use CR or to target IGF-1 for cancer prevention could result in adverse effects on bone density," according to David Berrigan, Ph.D., cancer prevention and control fellow, NCI, and ...
Study backs theory that accumulating mutations of 'quiet' genes foster aging
CHAMPAIGN, Ill. -- A theory that suggests the aging
process might be safely slowed by targeting genes ...ction, of the two leading evolutionary theories of aging
on the reproductive success of 100 different genotypes of fruit flies (Drosophila melanogaster) acro...
Nutrition and exercise boost effectiveness of flu shot in older people
...ngen University in The Netherlands noted that with aging
the immune system functions less effectively. Because of this, the influenza vaccination does not always result in adequate protective serum antibody in older adults. However, in healthy, well-nourished elderly people, there is only a small decline i...
University of Pittsburgh scientist discusses blood cell damage from biomedical devices
...d also shared other important characteristics with aging
cells, such as an increased ability to aggregate -- form stacks of cells which increases blood viscosity, Dr. Kameneva said. There also is evidence that biomechanical devices decrease the number of white blood cells and platelets to below normal lev...
Jackson researchers identify a gene implicated in oxidative stress and neurodegeneration
...een cell cycle re-entry and oxidative stress in an aging
central nervous system. To date, ALS is the one neurodegenerative disorder known to be caused by oxidative damage to neurons. However, oxidative stress has been identified as a possible cause of several later-onset neurodegenerative diseases, and the...
No one's laughing now
...re System, a program that has fostered research on aging
since the mid-1970s. The university also has geared up to do more breakthrough genetic studies. It collaborated with several other institutions in Arkansas to obtain $6 million from the NIH to create a network of high-powered research laboratories in...
Research may take the 'anti' out of antioxidants
...ucial in combating ailments ranging from cancer to aging
antioxidant has been the Holy Grail. But findings published this week in Nature suggest oxidation isn't always the enemy.Scientists at Michigan State University, along with colleagues in England, have uncloaked a mechanism that uses oxygen to repair...
Upside-down flies may offer clues to aging in humans
... eventually will help scientists better understand aging
and degenerative diseases in humans. A team of res... to death, and morbidity is a natural stage of the aging
process," said Nikos Papadopoulos, a post-graduate researcher and lead author on the study. "If it t...
Biomarkers of aging news advisory
...ontologists have long sought to find biomarkers of aging
and longevity in humans that would help distinguish physiological age from chronological age....
Caloric restriction research: moving from lab animals to humans
... of animals can extend life span and slow down the aging
process. The prevalence of obesity in America has ...feasible? Caloric restriction retards diseases and aging
among lab rodents, and is now being tested in nonhuman primates with the goal to eventually identify...
Researchers identify genes associated with aging of the retina
...Kellogg Eye Center researchers have found that the aging
of the human retina is accompanied by distinct cha...ave established the first-ever gene profile of the aging
human retina, an important step in understanding the mechanisms of aging
and its impact on vision di...
Estrogen combined with calcium and vitamin D may prevent tooth loss
...l Medicine. "Tooth loss is fairly prevalent in the aging
population, particularly in people over 65, about 40 percent of whom have lost all their teeth," says Roberto Civitelli, M.D., professor of medicine and of cell biology and physiology. "The risk is higher for women aged 65 or older, and continues to ...
Evidence that adults stem cells differentiate like embryonic stem cells published in Nature
... mouse and rat bone marrow can be cultured without aging
and with active telomerase, an enzyme found in embryonic stem cells that prevents aging. In subsequent studies, Verfaillie's lab showed that single MAPCs can contribute to most, if not all, tissues of mice after they have been injected into the blast...
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