الأربعاء، 4 يوليو 2012

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News


Study sheds light on pregnancy complications and overturns common belief

Posted: 03 Jul 2012 05:05 PM PDT

Women who have a specific type of antibody that interferes with blood vessel function are at risk for adverse pregnancy outcomes and that other antibodies in the same family thought to cause pregnancy complications do not put women at risk, new research shows.

Natural plant protein converted into drug-delivery vehicles

Posted: 03 Jul 2012 05:05 PM PDT

Finding biocompatible carriers that can get drugs to their targets in the body involves significant challenges. Researchers have now shown a new approach for making vesicles and fine-tuning their shapes. By starting with a protein that is found in sunflower seeds, they used genetic engineering to make a variety of protein molecules that assemble into vesicles and other useful structures.

New animal model may lead to treatments for common liver disease

Posted: 03 Jul 2012 04:01 PM PDT

Scientists have developed the laboratory opossum as a new animal model to study the most common liver disease in the nation -- afflicting up to 15 million Americans -- and for which there is no cure.

Following the genomic pathways to stop the spread of cancer

Posted: 03 Jul 2012 03:58 PM PDT

Researchers say the new way to treat cancers in the post-genomic era will involve drug discoveries based on specific pathways.

Epigenetics alters genes in rheumatoid arthritis

Posted: 03 Jul 2012 02:25 PM PDT

Researchers have investigated a mechanism usually implicated in cancer and in fetal development, called DNA methylation, in the progression of rheumatoid arthritis. They found that epigenetic changes due to methylation play a key role in altering genes that could potentially contribute to inflammation and joint damage.

Bees can 'turn back time,' reverse brain aging

Posted: 03 Jul 2012 02:25 PM PDT

Scientists have discovered that older honey bees effectively reverse brain aging when they take on nest responsibilities typically handled by much younger bees. While current research on human age-related dementia focuses on potential new drug treatments, researchers say these findings suggest that social interventions may be used to slow or treat age-related dementia.

Researchers moving towards ending threat of West Nile virus

Posted: 03 Jul 2012 02:25 PM PDT

Mosquitoes are buzzing once again, and with that comes the threat of West Nile virus. Scientists are making every effort to put an end to this potentially serious infection.

Why current strategies for fighting obesity are not working

Posted: 03 Jul 2012 01:27 PM PDT

As the United States confronts the growing epidemic of obesity among children and adults, a team of obesity researchers concludes that what the nation needs is a new battle plan -- one that replaces the emphasis on widespread food restriction and weight loss with an emphasis on helping people achieve "energy balance" at a healthy body weight.

Feel-good glass for windows

Posted: 03 Jul 2012 01:26 PM PDT

Daylight acts on our body clock and stimulates the brain. Researchers have made use of this knowledge and developed a coating for panes of glass that lets through more light. Above all, it promotes the passage through the glass of those wavelengths of light that govern our hormonal balance.

Exposure to violence has long-term stress effects among adolescents

Posted: 03 Jul 2012 01:26 PM PDT

Children who are exposed to community violence continue to exhibit a physical stress response up to a year after the exposure, suggesting that exposure to violence may have long-term negative health consequences, according to new research.

Adult stem cells from bone marrow: Cell replacement/tissue repair potential in adult bone marrow stem cells in animal model

Posted: 03 Jul 2012 01:26 PM PDT

Researchers report promising results from using adult stem cells from bone marrow in mice to help create tissue cells of other organs, such as the heart, brain and pancreas -- a scientific step they hope may lead to potential new ways to replace cells lost in diseases such as diabetes, Parkinson's or Alzheimer's.

Increase in track-related injuries found among youth in the United States

Posted: 03 Jul 2012 01:26 PM PDT

With the 2012 summer Olympic games about to take place in London, children everywhere are looking forward to watching their sports idols and role models take center stage. While the Olympics may inspire some to try a new sport, such as track, parents should be aware that this participation does not come without risk of injury.

Bugs inspire better X-rays: Nanostructures modeled like moth eyes may boost medical imaging

Posted: 03 Jul 2012 01:26 PM PDT

Using the compound eyes of the humble moth as their inspiration, physicists have developed new nanoscale materials that could someday reduce the radiation dosages received by patients getting X-rayed, while improving the resolution of the resulting images.

How cellular pathways converge to regulate food intake and body weight

Posted: 03 Jul 2012 01:17 PM PDT

In the complex chain of molecular events that underlie eating behaviors and body weight, the AMPK enzyme has proven to be a critical link. New research further elucidates AMPK's role, and could yield new treatment strategies for both metabolic diseases and cancers.

Genetic 911: Cells' emergency systems revealed

Posted: 03 Jul 2012 01:17 PM PDT

Toxic chemicals wreak havoc on cells, damaging DNA and other critical molecules. A new study reveals how a molecular emergency-response system shifts the cell into damage-control mode and helps it survive such attacks by rapidly producing proteins that counteract the harm.

Some diabetes drugs may increase risk of bladder cancer

Posted: 03 Jul 2012 01:17 PM PDT

An increased risk of bladder cancer is linked to the use of pioglitazone, a medication commonly used to treat Type 2 diabetes, according to a new study.

Thumbs down on fireworks, warns trauma expert

Posted: 03 Jul 2012 01:15 PM PDT

Thumb and finger loss account for 32 percent of all reported injuries due to fireworks - imagining not being able to text for life is more potent than personal safety to today's generation, says a trauma surgeon.

US Healthcare: ACA young adult mandate had big impact on extending health-care coverage, experts say

Posted: 03 Jul 2012 01:15 PM PDT

The number of young adults age 19 to 25 who are covered by their parents' employer-provided health insurance policies increased dramatically with the implementation of the Affordable Care Act, according to a new study.

Obesity, larger waist size associated with better outcomes in heart failure patients

Posted: 03 Jul 2012 01:14 PM PDT

A slim waist and normal weight are usually associated with better health outcomes, but that's not always the case with heart failure patients, according to a new study. Researchers found that in both men and women with advanced heart failure, obesity — as indicated by a high body mass index (BMI) — and a higher waist circumference were factors that put them at significantly less risk for adverse outcomes.

Parents less likely to develop colds

Posted: 03 Jul 2012 11:28 AM PDT

There is no question that being a parent is, at times, challenging both physically and mentally. However knowledge of the actual affect parenthood has on health has been inconsistent at best, until now. New research led shows that being a parent influences health in a positive way. The research provides the first evidence that, when exposed to a common cold virus, parents are 52 percent less likely to develop a cold than non-parents.

Researchers closer to understanding how proteins regulate immune system

Posted: 03 Jul 2012 11:28 AM PDT

Researchers have revealed how white blood cells move to infection or inflammation in the body; findings which could help lead to developing drug therapies for immune system disorders.

Global warming favors proliferation of toxic cyanobacteria

Posted: 03 Jul 2012 11:26 AM PDT

Cyanobacterial populations, primitive aquatic microorganisms, are frequently-encountered in water bodies especially in summer. Their numbers have increased in recent decades and scientists suspect that global warming may be behind the phenomenon, and are particularly concerned by the increase in toxic cyanobacteria, which affect human and animal health.

Ibuprofen improves bone repair after surgery or a fracture, study suggests

Posted: 03 Jul 2012 10:41 AM PDT

An in vitro study has demonstrated that a therapeutic dose of the non-steroidal anti-inflammatory drug ibuprofen improves bone repair.

Amniotic fluid yields alternatives to embryonic stem cells

Posted: 03 Jul 2012 10:37 AM PDT

Stem cells found in amniotic fluid can be transformed into a more versatile state similar to embryonic stem cells, according to a new study. Scientists have succeeded in reprogramming amniotic fluid cells without having to introduce extra genes. The findings raise the possibility that stem cells derived from donated amniotic fluid could be stored in banks and used for therapies and in research, providing a viable alternative to the limited embryonic stem cells currently available.

Molecular clues to link between childhood maltreatment and later suicide

Posted: 03 Jul 2012 10:37 AM PDT

Exposure to childhood maltreatment increases the risk for most psychiatric disorders as well as many negative consequences of these conditions. A new study provides important insight into one of the most extreme outcomes, suicide.

Childhood adversity increases risk for depression and chronic inflammation

Posted: 03 Jul 2012 10:37 AM PDT

When a person injures their knee, it becomes inflamed. When a person has a cold, their throat becomes inflamed. This type of inflammation is the body's natural and protective response to injury. Interestingly, there is growing evidence that a similar process happens when a person experiences psychological trauma. Unfortunately, this type of inflammation can be destructive.

Five or more cups of coffee a day reduce the chance of IVF success by around 50 percent

Posted: 03 Jul 2012 09:06 AM PDT

Women who drink five or more cups of coffee a day severely reduce their chance of success from IVF treatment. Indeed, Danish investigators who followed up almost 4000 IVF and ICSI patients described the adverse impact as "comparable to the detrimental effect of smoking."

Why smoking is 'BAD' for the Fallopian tube, and increases the risk of ectopic pregnancy

Posted: 03 Jul 2012 09:06 AM PDT

Cigarette smoke reduces the production of a Fallopian tube gene known as "BAD", which helps explain the link between smoking and ectopic pregnancy.

A high intake of certain dietary fats associated with lower live birth rates in IVF

Posted: 03 Jul 2012 09:06 AM PDT

Women with a higher intake of dietary saturated fats have fewer mature oocytes available for collection in IVF, according to results of a new study. The study investigated the effect of dietary fat (classified as total, saturated, monounsaturated, polyunsaturated, omega 6, omega 3 and trans) on a range of preclinical and clinical outcomes in women having IVF.

Organic tomatoes contain higher levels of antioxidants than conventional tomatoes, study suggests

Posted: 03 Jul 2012 09:06 AM PDT

Organic tomatoes contain higher levels of phenolic compounds than conventional tomatoes, according to new research. Phenolic compounds are organic molecules found in many vegetables with demonstrated human health benefits.

Searching for an ancient syphilis DNA in newborns

Posted: 03 Jul 2012 09:06 AM PDT

The ancient bones of newborns are very useful to recover the ancient DNA of the bacteria causing syphilis, the Treponema pallidum pallidum. Scientists were able to obtain the genetic material from the bacteria in more than one individual, in what is considered to be the oldest case known to date. Several previous attempts had only achieved to yield this material in one occasion and from only one individual.

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