الثلاثاء، 24 يوليو 2012

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News


Two out of three very obese kids already have heart disease risk factors: High blood pressure, cholesterol, blood glucose evident even in under-12s

Posted: 23 Jul 2012 04:32 PM PDT

Two out of three severely obese kids already have at least one risk factor for heart disease, suggests new research.

High dietary antioxidant intake might cut pancreatic cancer risk

Posted: 23 Jul 2012 04:32 PM PDT

Increasing dietary intake of the antioxidant vitamins C, E, and selenium could help cut the risk of developing pancreatic cancer by up to two thirds, suggests new research.

Boosting new memories with wakeful resting

Posted: 23 Jul 2012 02:18 PM PDT

Too often our memory starts acting like a particularly porous sieve: All the important fragments that should be caught and preserved somehow just disappear. So armed with pencils and bolstered by caffeine, legions of adults, especially older adults, tackle crossword puzzles, acrostics, Sudoku and a host of other activities designed to strengthen their flagging memory muscles.

Trial signals major milestone in hunt for new TB drugs

Posted: 23 Jul 2012 02:18 PM PDT

A novel approach to discover the first new tuberculosis (TB) combination drug regimen cleared a major hurdle when Phase II clinical trial results found it could kill more than 99 percent of patients' TB bacteria within two weeks and could be more effective than existing treatments, according to a new study. These results add to a growing body of evidence that the new regimen could reduce treatment by more than a year for some patients.

Aging heart cells rejuvenated by modified stem cells

Posted: 23 Jul 2012 02:18 PM PDT

Damaged and aged heart tissue of older heart failure patients was rejuvenated by stem cells modified by scientists, according to new research.

First study of heart 'maps' for kids could help correct rapid rhythms

Posted: 23 Jul 2012 02:18 PM PDT

Creating a 3-D map of the heart's electrical signals could help treat kids with rapid heartbeat. The new technique provides a more accurate guide for pediatric ablation.

Bloodstream scavenger inhibits clotting without increased bleeding

Posted: 23 Jul 2012 01:27 PM PDT

A compound that mops up debris of damaged cells from the bloodstream may be the first in a new class of drugs designed to address one of medicine's most difficult challenges -- stopping the formation of blood clots without triggering equally threatening bleeding.

Mice have distinct subsystem to handle smell associated with fear

Posted: 23 Jul 2012 01:27 PM PDT

Mice appear to have a specialized system for detecting and at least initially processing instinctually important smells such as those that denote predators. The finding raises a question about whether their response to those smells is hardwired.

Cognitive changes may be only sign of fetal alcohol exposure

Posted: 23 Jul 2012 01:26 PM PDT

Most children exposed to high levels of alcohol in the womb do not develop the distinct facial features seen in fetal alcohol syndrome, but instead show signs of abnormal intellectual or behavioral development, according to a new study.

Social deprivation has a measurable effect on brain growth

Posted: 23 Jul 2012 01:26 PM PDT

Social deprivation has a measurable effect on a child's brain growth. MRI scans show decreased grey and white matter among children in institutional care. At least eight million children worldwide live in institutional settings, according to UNICEF, exposing them to severe psychological and physical neglect.

Medical rarity: Two double lung transplants in same family

Posted: 23 Jul 2012 12:10 PM PDT

Sarah Ridder and her brother John Grosvenor each have received double lung transplants. The transplants were necessary because the siblings had a progressive lung disease called pulmonary fibrosis that runs in their family.

Synthetic stimulants called 'bath salts' act in the brain like cocaine

Posted: 23 Jul 2012 12:10 PM PDT

Results of a new study offer compelling evidence for the first time that mephedrone, like cocaine, does have potential for abuse and addiction.

Why do anti-hunger and anti-obesity initiatives always fall short?

Posted: 23 Jul 2012 12:10 PM PDT

Researchers argue that while hunger and obesity are caused by a perfect storm of multiple factors acting in concert, the efforts to counter them have been narrowly focused and isolated. Overcoming the many barriers to achieving healthy nutrition worldwide, the researchers argue, will instead require an unprecedented level of joint planning and action between academia, government, civil society and industry.

Microwave heating improves artificial bone

Posted: 23 Jul 2012 12:00 PM PDT

An artificial bone scaffold could enhance the treatment of bone damage and defects through bone grafts.

New compounds inhibit prion infection

Posted: 23 Jul 2012 10:48 AM PDT

Researchers have identified a new class of compounds that inhibit the spread of prions, misfolded proteins in the brain that trigger lethal neurodegenerative diseases in humans and animals. Scientists have now developed compounds that clear prions from infected cells derived from the brain.

Neural precursor cells induce cell death in certain brain tumors

Posted: 23 Jul 2012 10:48 AM PDT

Neural precursor cells in the young brain suppress certain brain tumors such as high-grade gliomas, especially glioblastoma, which are among the most common and most aggressive tumors. Now researchers have deciphered the underlying mechanism of action with which neural precursor cells protect the young brain against these tumors.

New model of disease contagion ranks US airports in terms of their spreading influence

Posted: 23 Jul 2012 10:47 AM PDT

A new model of disease contagion ranks US airports in terms of their spreading influence. Unlike existing models, the new model incorporates variations in travel patterns among individuals, the geographic locations of airports, the disparity in interactions among airports, and waiting times at individual airports. Airports in New York, Los Angeles and Honolulu are judged likeliest to play a significant role in the growth of a pandemic.

Powerful class of antioxidants may be potent Parkinson's treatment

Posted: 23 Jul 2012 10:47 AM PDT

A new and powerful class of antioxidants could one day be a potent treatment for Parkinson's disease, researchers report.

New findings break tanning misconceptions: There is no such thing as a safe tan

Posted: 23 Jul 2012 10:47 AM PDT

UV-induced melanin formation (tanning), traditionally thought to protect against skin cancer, has now been shown to be directly involved in melanoma formation in mammals, according to researchers. Dermatologists have been warning for years there is no such thing as a safe tan and this new data appears to confirm this, experts say.

Why does a vivid memory 'feel so real?'

Posted: 23 Jul 2012 10:47 AM PDT

Neuroscientists have found strong evidence that vivid memory and directly experiencing the real moment can trigger similar brain activation patterns.

Aspirin protects against Barrett's esophagus, study suggests

Posted: 23 Jul 2012 10:46 AM PDT

Aspirin use appears to reduce the risk of Barrett's esophagus, the largest known risk factor for esophageal cancer.

Childhood obesity linked to cancer risk

Posted: 23 Jul 2012 10:46 AM PDT

Researchers have found that obesity in adolescence, defined as a Body Mass Index in the 85th percentile and above, has a direct link to the incidence of bladder, urinary tract, and colorectal cancers in adulthood.

Loss of tiny liver molecule might lead to liver cancer

Posted: 23 Jul 2012 10:46 AM PDT

A new study shows that loss of a molecule called microRNA-122 in liver cells might lead to liver cancer. Cancer scientists found that when the molecule is missing, the liver develops fat deposits, inflammation and tumors that resemble hepatocellular carcinoma, the most common form of liver cancer. Artificially restoring the molecule dramatically reduced the size and number of tumors and might offer a new way to treat the disease.

Why some types of multitasking are more dangerous

Posted: 23 Jul 2012 10:44 AM PDT

In a new study that has implications for distracted drivers, researchers found that people are better at juggling some types of multitasking than they are at others.

Laser technology developed to fight cancer

Posted: 23 Jul 2012 10:44 AM PDT

Researchers have developed a technology that goes on a "seek and destroy" mission for cancerous tumors. They have harnessed the power of lasers to find, map and non-invasively destruct cancerous tumors.

Survival rates for premature babies in high-level NICUs are better than previously reported

Posted: 23 Jul 2012 10:44 AM PDT

Premature babies are more likely to survive when they are born in high-level neonatal intensive care units (NICUs) than in hospitals without such facilities, and this benefit is considerably larger than previously reported.

Snacking and BMI linked to double effect of brain activity and self-control

Posted: 23 Jul 2012 07:54 AM PDT

Snack consumption and BMI are linked to both brain activity and self-control. New research discovered that an individual's brain 'reward center' response to pictures of food predicted how much they subsequently ate. This had a greater effect on the amount they ate than their conscious feelings of hunger or how much they wanted the food.

Judging DNA by its cover: Explaining the link between stem cells and cancer

Posted: 23 Jul 2012 07:54 AM PDT

A newly-discovered molecular mechanism might explain the link between stem cells and cancer.

Improving cognitive function with ginseng-fortified milk?

Posted: 23 Jul 2012 07:53 AM PDT

American ginseng is reported to have neurocognitive effects, and research has shown benefits in aging, central nervous system disorders, and neurodegenerative diseases. The challenges of incorporating ginseng into food are twofold: it has a bitter taste, and food processing can eliminate its healthful benefits. Dairy scientists have now formulated low-lactose functional milk that maintained beneficial levels of American ginseng after processing.

New understanding of diabetes and kidney disease: Findings may lead to effective new treatments

Posted: 23 Jul 2012 07:50 AM PDT

Scientists have identified biological mechanisms by which glucagon-like peptide-1 (GLP-1), a gut hormone, protects against kidney disease, and also mechanisms that inhibit its actions in diabetes.

New clue on how brain processes visual information

Posted: 23 Jul 2012 06:52 AM PDT

Ever wonder how the human brain, which is constantly bombarded with millions of pieces of visual information, can filter out what's unimportant and focus on what's most useful?

Pre-season fitness makes no difference to risk of injury, but type of sport and gender does, study suggests

Posted: 23 Jul 2012 06:51 AM PDT

A new study into varsity athletics found that women had a shorter time to injury than men and that certain sports, such as volleyball, also had a significantly shorter time to injury than others, such as hockey or basketball.

New epilepsy gene identified; possible new treatment option

Posted: 23 Jul 2012 06:51 AM PDT

Neuroscientists have identified a new gene involved in epilepsy and could potentially provide a new treatment option for patients with epilepsy. 

Mechanisms underlying blood disorders identified

Posted: 23 Jul 2012 06:50 AM PDT

Scientists have uncovered a protein structure that regulates cell signalling and the formation of blood cells. The findings shed light on the mechanisms at play in hematological disorders and provide new opportunities for the design of disease-specific treatment.

Shades of grey and prostate cancer

Posted: 23 Jul 2012 06:50 AM PDT

Scientists in France have developed a computer program that can analyse in detail different shades of grey in medical images. They explain how the program based on the Grey Level Difference Method can improve accuracy in the diagnosis of prostate cancer.

Type 2 diabetes drug, DPP-4 inhibitor linagliptin, is clinically effective for long-term use, thirty-two country trial suggests

Posted: 23 Jul 2012 06:50 AM PDT

An extended trial of a drug for people with type 2 diabetes has confirmed that the oral DPP-4 inhibitor linagliptin is a safe and effective means of lowering glucose levels for up to 102 weeks, either on its own or in combination with other selected oral anti-diabetic medication.

Microneedles target therapeutics to back of the eye

Posted: 23 Jul 2012 06:48 AM PDT

Thanks to tiny microneedles, eye doctors may soon have a better way to treat diseases such as macular degeneration that affect tissues in the back of the eye.

Children with trisomy 13 and 18 and their families appear happy

Posted: 23 Jul 2012 06:48 AM PDT

Children with trisomy 13 or 18, who are for the most part severely disabled and have a very short life expectancy, and their families lead a life that is happy and rewarding overall, contrary to the usually gloomy predictions made by the medical community at the time of diagnosis, according to a study of parents who are members of support groups.

New lipid screening guidelines for children overly aggressive, experts say

Posted: 23 Jul 2012 06:48 AM PDT

Recent guidelines recommending cholesterol tests for children fail to weigh health benefits against potential harms and costs, according to a new commentary.

Sport sciences looks at demands of competitive surfing

Posted: 23 Jul 2012 06:48 AM PDT

Want to train to become a competitive surfer? You'll need high endurance for paddling with bursts of high-intensity activity and short recovery times, according to a new study.

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