Study: Two-thirds of Americans have some physical or mental illness

The total package of good physical and mental health is elusive for most American adults, according to new research. Two-thirds of U.S. adults participating in a 1995 survey reported some degree of physical or mental infirmity that kept them from being completely healthy. The remaining third of the survey group was split into nearly equal percentages of completely healthy and completely unhealthy individuals, say the study’s authors.

Feeling stressed can lower vaccine’s effectiveness

A person’s state of mind may influence the body’s response to a vaccine against meningitis C, suggests new research. The findings support previous research showing a link between psychological factors and antibody response to vaccines. The results of a broad survey revealed that a high level of perceived life stress, but not actual stress, was associated with low antibody levels. A low level of psychological well being – feeling anxious or under strain, for example – was also linked to low antibody levels.

Blood Proteins Put Dialysis Patients at Higher Risk of Heart Disease

A new study shows that two proteins are accurate predictors of heart attack or stroke in kidney dialysis patients. The research team found that high levels of C-reactive protein, a marker of inflammation, and low levels of albumin, a sign of malnutrition, had strong ties to heart disease in these patients, who are many times more likely to develop heart problems than the general population. “Both inflammation and malnutrition play an important role in the high risk of cardiovascular disease among dialysis patients,” says Josef Coresh, M.D., Ph.D., lead author of the study and associate professor of epidemiology, medicine and biostatistics at Hopkins. “Testing for these proteins will allow us to sooner identify patients at high risk, and to manage heart disease risk factors more effectively.”

Statistics Help Infants Build Knowledge of Visual World

A baby’s first look at the world is likely a dizzying array of shapes and motion that are meaningless to a newborn, but researchers at the University of Rochester say they have now shown that babies use relationships between objects to build an understanding of the world. By noting how often objects appear together, infants can efficiently take in more knowledge than if they were to simply see the same shapes individually, says the paper published in the current issue of Proceedings of the National Academy of Sciences.

Preparation high, confidence low against bioterrorism

A survey has found that while 80 percent of attendees at a recent international biosecurity conference say their organizations — including first responder, medical, military and industrial outfits — have plans in place to counter bioterrorism, two-thirds doubt they would be safe in the event of a biological or chemical attack.

Chinese company claims cancer test advance

A Chinese medical equipment manufacturer says it will begin marketing a test kit that can detect the presence of tumour abnormal protein (TAP), from a single drop of blood. That, the company says, can provide cell diagnostics up to three years before terminal cancer is formed, and before any clinical symptoms appear.

Mother’s marital status, not age, linked to later depression

The age a mother first gives birth may be less relevant to her chance of later-life depression than her marital status, according to new research showing that unmarried teenage mothers and unmarried adult mothers have similar levels of depressive symptoms in their late 20s. The study also found that living in a female-headed family at age 14, living with a stepfather at age 14, having low self-esteem in mid-adolescence and having poor verbal and math skills predicted depressive symptoms in young adulthood.

NASA uses ‘extremophile’ microbes to grow nanostructures

NASA scientists have invented a biological method to make ultra-small structures that could be used to produce electronics 10 to 100 times smaller than today’s components. As part of their new method, scientists use modified proteins from ‘extremophile’ microbes that live in near-boiling, acidic hot springs to grow mesh-like structures so small that an electron microscope is needed to see them.
“Our innovation takes advantage of the innate ability of proteins to form into ordered structures and for us to use genetic engineering to change nature’s plans, transforming these structures into something useful,” said one of the project’s lead researchers.

Researchers Identify Cause of Aggressive Childhood Cancer

Researchers have generated a mouse model of a new type of tumor suppressor gene that triggers a rapidly advancing cancer that affects children. The discovery of the fast-onset cancers that result from inactivation of the gene and the technique used to generate the model will likely prove useful in studying genes involved in other forms of cancer.

Discovery May Dramatically Reduce Liver Transplants in Children

A discovery published in the current issue of The Lancet may lead to new treatments for a deadly liver disease of infancy — dramatically reducing the number of liver transplants in children. A team of researchers at Cincinnati Children’s Hospital have revealed a genetic underpinning to biliary atresia, the most common reason for liver transplant in children. Biliary atresia occurs in infants and usually becomes evident two to eight weeks after birth. Its cause has been unknown. Symptoms include unexplained jaundice, dark urine, clay-colored stools and weight loss. The disease destroys bile ducts in the liver, trapping bile, rapidly causing damage to liver cells and severe scarring.

Brain’s perception depends upon the source of cues, researchers find

When the human brain is presented with conflicting information about an object from different senses, it finds a remarkably efficient way to sort out the discrepancies, according to new research conducted at the University of California, Berkeley. The researchers found that when sensory cues from the hands and eyes differ from one another, the brain effectively splits the difference to produce a single mental image. The researchers describe the middle ground as a “weighted average” because in any given individual, one sense may have more influence than the other. When the discrepancy is too large, however, the brain reverts to information from a single cue – from the eyes, for instance – to make a judgment about what is true.