A daily dose of caffeine blocks the disruptive effects of high cholesterol that scientists have linked to Alzheimer's disease. A study in the Journal of Neuroinflammation revealed that caffeine equivalent to just one cup of coffee a day could protect the blood-brain barrier (BBB) from damage that occurred with a high-fat diet.
The BBB protects the central nervous system from the rest of the body's circulation, providing the brain with its own regulated microenvironment. Previous studies have shown that high levels of cholesterol break down the BBB which can then no longer protect the central nervous system from the damage caused by blood borne contamination. BBB leakage occurs in a variety of neurological disorders such as Alzheimer's disease.
DNA repair capacity is an important factor in cancer, inflammation, aging, and other human conditions. Radiation is something we can never avoid and it's responsible for a lot of medical problems.
Bdelloid rotifers have been able to give up sex and escape the usual drawback of asexuality – extinction - and still survive because they have evolved an extraordinary efficient mechanism for repairing harmful mutations to their DNA, say the Marine Biological Laboratory’s David Mark Welch, Matthew Meselson, and their colleagues.
What’s more, they have done so over millions of years of evolution, resulting in at least 370 species.
We all know people who can seemingly eat whatever they want and not gain weight. Recent research from Tel Aviv University says a woman’s waistline may have less to do with rigorous exercise and abstaining from sweets than it does with the genes of her parents.
A new study by Prof. Gregory Livshits from the Sackler Faculty of Medicine at Tel Aviv University and colleagues from King’s College in London found a scientific link between the lean body mass of a woman and her genes. They’ve determined that thinness – like your smile or the color of your eyes – is an inheritable trait.
Of the almost 25,000 human genes science that have been identified, half are believed to be silent at any particular time and activated only when needed.
Perhaps not, says Andre Ptitsyn, of the Center for Bioinfomatics at Colorado State University. He says he has discovered that current tools cannot measure extraordinarily low levels of gene expression signals so genes may not be turned off, but instead have undetected functioning.
"Genes that we have believed to be silent are actually whispering," said Ptitsyn, who a applied a common physics principle to find oscillating patterns of gene expression in genes previously thought to be shut off.
Healthy men who report lower levels of the nutrient folate in their diets have higher rates of chromosomal abnormalities in their sperm, according to a new study by researchers at the University of California, Berkeley, and the Lawrence Berkeley National Laboratory.
Women of child-bearing age are encouraged to maintain adequate levels of folate in their diet, but the new findings, to be published Thursday, March 20, in the journal Human Reproduction, provide evidence that what men eat may also affect reproductive health.
Obesity is associated with clear changes in gene-networks and the dysfunction of mitochondria, say researchers at the University of Helsinki and the National Public Health Institute - worse, the impacts of these cellular changes may aggravate and work to maintain the obese state in humans
Surprisingly, the genes most drastically affected by obesity were ones involved in the breakdown of a class of amino acids known as branched-chain amino acids. These changes in the obese twins were clearly associated with pre-diabetic changes in sugar metabolism and the action of the hormone insulin.
The researchers say that, while healthy eating habits and exercise are important, genes play some role in the development of obesity, so they studied rare cases of young (25 year old) identical twins with large differences in bodyweight and saw clear changes in the function of the cellular mitochondria.
A brain network linked to introspective tasks -- such as forming the self-image or understanding the motivations of others -- is less intricate and well-connected in children, say researchers. They also showed that the network establishes firmer connections between various brain regions as an individual matures.
The scientists are working to establish a picture of how these connections and other brain networks normally develop and interact.
Numerous studies have shown the the benefits of coffee
. Science studies go back and forth on foods so use some judgment but generally today it is considered one of the best sources of the antioxidants that protect us against pesky free radicals that can cause premature aging and certain diseases.
Taking the supplement ginkgo biloba had no clear-cut benefit on the risk of developing memory problems, according to a study published in Neurology®.
The three-year study involved 118 people age 85 and older with no memory problems. Half of the participants took ginkgo biloba extract three times a day and half took a placebo. During the study, 21 people developed mild memory problems, or questionable dementia: 14 of those took the placebo and seven took the ginkgo extract. Although there was a trend favoring ginkgo, the difference between those who took gingko versus the placebo was not statistically significant.
In people affected by acquired immuno-deficiency syndrome it may often be observed a rise of cutaneous emergencies, whose impact spans from 25% in asyntomatic subjects to 100% in the case of very evident AIDS.
The frequency and the atypic nature of these emergencies gives a highlighted role to the dermatologist, characterizing the early diagnosis of cutaneous pathologies as the qualifying moment in the analysis of AIDS affected patient.
As the starting moment in the HIV-positive subject examination, search for injuries referable to Kaposi's sarcoma, especially at the mucous level (pharinx wounds are evident in 10 to 50% of total cases).