Women who do not have enough vitamin D before menopause may have an elevated risk of developing high blood pressure years later, new research suggests.
Month: September 2009
Modeling Diabetes with Stem Cells
Reprogrammed adult cells could be used to reconstruct diabetes in the laboratory.
New Drug Shrinks Skin Cancer Tumors
An experimental drug appears to dramatically and rapidly shrink deadly skin cancer tumors, researchers report.
Lack of Sleep Increases the Risk of Catching a Cold
Studies have demonstrated that poor sleep and susceptibility to colds go hand in hand, and scientists think it could be a reflection of the role sleep plays in maintaining the body’s defenses.
Really? – The Claim – Lack of Sleep Increases the Risk of Catching a Cold. – Question – NYTimes.com.
In One Study, a Heart Benefit for Chocolate
In a study that will provide comfort to chocoholics everywhere, researchers in Sweden have found evidence that people who eat chocolate have increased survival rates after a heart attack — and it may be that the more they eat, the better.
Mediterranean Diet Helps Control Diabetes
ating a Mediterranean-style diet may help people with type 2 diabetes keep their disease under control without drugs better than following a typical low-fat diet.
American Heart Association Recommends Limiting Added Sugars
The American Heart Association today released new recommendations on limiting intake of added dietary sugars.
American Heart Association Recommends Limiting Added Sugars.
New biosensor can detect bacteria instantaneously
A research group from the Rovira i Virgili University (URV) in Tarragona has developed a biosensor that can immediately detect very low levels of Salmonella typhi, the bacteria that causes typhoid fever. The technique uses carbon nanotubes and synthetic DNA fragments that activate an electric signal when they link up with the pathogen.
Continue reading “New biosensor can detect bacteria instantaneously”
Too-Thin Thighs Unhealthy?
Thighs Less Than 23 Inches Around May Be Risky, Maybe Because of Too Little Muscle
Human fat is easily converted to pluripotent stem cells
Globs of human fat removed during liposuction conceal versatile cells that are more quickly and easily coaxed to become induced pluripotent stem cells, or iPS cells, than are the skin cells most often used by researchers, according to a new study from Stanford’s School of Medicine. Continue reading “Human fat is easily converted to pluripotent stem cells”
Study of huge numbers of genetic mutations point to oxidative stress as underlying cause
A study that tracked genetic mutations through the human equivalent of about 5,000 years has demonstrated for the first time that oxidative DNA damage is a primary cause of the process of mutation – the fuel for evolution but also a leading cause of aging, cancer and other diseases.
The research, just published in Proceedings of the National Academy of Sciences, also indicated that natural selection is affecting the parts of the genome that don’t contain genes – supposedly “junk” DNA that increasingly appears to have important roles in life processes that are very poorly understood. Continue reading “Study of huge numbers of genetic mutations point to oxidative stress as underlying cause”
Eat Late, Put on Weight?
Excessive late-night eating has long had a bad reputation, with studies showing it leads to weight gain.
Now, in a new study, researchers from Northwestern University have found that eating at the “wrong” time leads to more than twice as much weight gain, even when the overall calories consumed are the same as those eaten at appropriate times.
Researchers identify critical gene for brain development, mental retardation
In laying down the neural circuitry of the developing brain, billions of neurons must first migrate to their correct destinations and then form complex synaptic connections with their new neighbors.
When the process goes awry, neurodevelopmental disorders such as mental retardation, dyslexia or autism may result. Researchers at the University of North Carolina at Chapel Hill School of Medicine have now discovered that establishing the neural wiring necessary to function normally depends on the ability of neurons to make finger-like projections of their membrane called filopodia.
|Continue reading “Researchers identify critical gene for brain development, mental retardation”|
Molecular ‘GPS’ helps researchers probe processes important in aging and disease
With all the hype about beneficial antioxidants in everything from face cream to cereal bars, you’d think their targets—oxygen radicals—must be up to no good. It’s true, the buildup of oxygen radicals and other reactive oxygen species (ROS) in cells contributes to aging and possibly to diseases such as cancer and Alzheimer’s.
But in moderate amounts, ROS also help keep cells healthy by controlling cell division, movement and other normal biological processes. Continue reading “Molecular ‘GPS’ helps researchers probe processes important in aging and disease”
Researchers find that protein believed to protect against cancer has a Mr. Hyde side
In a biological rendition of fiction’s Strange Case of Dr. Jekyll and Mr. Hyde, researchers from the Mayo Clinic campus in Florida and Harvard Medical School have found that a protein thought to protect against cancer development can actually spur the spread of tumors.
The scientists, reporting in the Sept. 3 issue of Molecular and Cellular Biology, found that FOXO3a, a transcription factor that regulates gene expression, becomes active when growing cancer cells begin to starve. Their research suggests that this protein then turns on molecular switches that allow the cancer cells to invade surrounding tissues. Continue reading “Researchers find that protein believed to protect against cancer has a Mr. Hyde side”
Scientists identify genetic cause for type of deafness
A team led by scientists from The Scripps Research Institute has discovered a genetic cause of progressive hearing loss. The findings will help scientists better understand the nature of age-related decline in hearing and may lead to new therapies to prevent or treat the condition. Continue reading “Scientists identify genetic cause for type of deafness”
Mice Can Eat ‘Junk’ And Not Get Fat: Researchers Find Gene That Protects High-fat-diet Mice From Obesity
University of Michigan researchers have identified a gene that acts as a master switch to control obesity in mice. When the switch is turned off, even high-fat-diet mice remain thin. Continue reading “Mice Can Eat ‘Junk’ And Not Get Fat: Researchers Find Gene That Protects High-fat-diet Mice From Obesity”
THE FIRST DNA BARCODES OF COMMONLY TRADED BUSHMEAT ARE PUBLISHED
Leather handbags and chunks of red meat: when wildlife specialists find these items in shipping containers, luggage, or local markets, they can now use newly published genetic sequences known as “DNA barcodes” to pinpoint the species of origin. Experts hope that this simple technique will track the harvesting of bushmeat (or wildlife hunted largely in Asia, South and Central America, and Africa) and will ultimately crack down on the widespread and growing international trade in bushmeat, a market estimated to be worth as much as $15 billion in 2008. According to a paper published in the early online edition of Conservation Genetics, barcodes can ably and quickly distinguish among a large number of commercially traded species, so that a handbag is identified as caiman or Nile crocodile, and the meat as duiker or mangabey. Continue reading “THE FIRST DNA BARCODES OF COMMONLY TRADED BUSHMEAT ARE PUBLISHED”
Moderate Drinking Over 60 May Lower Dementia Risk
People over 60 who consume moderate amounts of alcohol have a reduced risk for Alzheimer’s disease and other dementias, according to a large review of studies.
Vital Signs – Moderate Drinking Over 60 May Lower Dementia Risk – NYTimes.com.
Hedgehog Drug Helps Late-Stage Cancers
Advanced Skin, Brain Cancers Improve With Experimental Hedgehog Drug
Alcohol a Motivator for Exercise?
Study: Drinkers Appear to Get More Exercise Than Non-Drinkers, but Longer Workouts Don’t Outweigh Health Woes of Heavy Drinking
Scientists identify gene that predicts post-surgical survival from brain metastasis of breast cancer patients
Researchers at the National Cancer Institute have identified a gene that may play a role in breast cancer metastasis to the brain, according to a report in Molecular Cancer Research, a journal of the American Association for Cancer Research. Continue reading “Scientists identify gene that predicts post-surgical survival from brain metastasis of breast cancer patients”
Central gears of the mammalian circadian clock exposed
The circadian clock, a 24-hour metabolic rhythm governing sleep cycles and other physiological processes, has long been known to play a central role in regulating the daily activities of living organisms. Its detailed biochemical mechanisms, however, have largely remained a mystery.
Continue reading “Central gears of the mammalian circadian clock exposed”