السبت، 17 أكتوبر 2015

ScienceDaily: Health & Medicine News

ScienceDaily: Health & Medicine News


Investigators create complex kidney structures from human stem cells derived from adults

Posted: 16 Oct 2015 11:26 AM PDT

A highly efficient method has been developed for making kidney structures from stem cells that are derived from skin taken from patients. The kidney structures formed could be used to study abnormalities of kidney development, chronic kidney disease, the effects of toxic drugs, and be incorporated into bioengineered devices to treat patients with acute and chronic kidney injury, say scientists.

Scientists make advancements that may lead to new treatments for Parkinson's

Posted: 16 Oct 2015 11:04 AM PDT

A research team has made breakthrough advancements on a new molecular mechanism that may provide a means to "melt" pathological clumps known as Lewy clumps. These clumps are a hallmark sign of Parkinson's disease.

A nap to recap: How reward, daytime sleep boost learning

Posted: 16 Oct 2015 10:53 AM PDT

Rewarding learning selectively enhances the consolidation of learned information during sleep, report scientists. This human study builds on what we know from Drosophila by showing how sleep and reward combine to boost memory.

Huntington's disease protein controls movement of precious cargo inside cells, study finds

Posted: 16 Oct 2015 08:58 AM PDT

A new study marks a step toward understanding the Huntingtin protein (Htt) is responsible for Huntington's disease. The research shows that Htt controls the movement of precious cargo traveling up and down neurons, the cells that form the core of the nervous system in animals.

College students say prescription stimulants easy to find on campus

Posted: 16 Oct 2015 08:56 AM PDT

Seven out of 10 college students say it is somewhat or very easy to obtain controlled stimulants without a prescription, according to a new survey conducted on eight US campuses.

App facilitates early detection, treatment of COPD exacerbation symptoms

Posted: 16 Oct 2015 08:55 AM PDT

A digital health application for reporting symptoms of chronic obstructive pulmonary disease (COPD) facilitated early detection and treatment of COPD exacerbation symptoms, according to an analysis.

Nicotine gives brain more codeine relief, risk of addiction

Posted: 16 Oct 2015 08:55 AM PDT

Nicotine use over time increases the speed that codeine is converted into morphine within the brain, by increasing the amount of a specific enzyme, according to new research in rat models. It appears smokers' brains are being primed for a bigger buzz from this common pain killer -- which could put them at a higher risk for addiction, and possibly even overdose. These findings are part a new way of seeing the brain's role when it comes to drugs and toxins.

Anti-clumping strategy for nanoparticles

Posted: 16 Oct 2015 08:54 AM PDT

Nanoparticles are ubiquitous in industrial applications ranging from drug delivery and biomedical diagnostics to developing hydrophobic surfaces, lubricant additives and enhanced oil recovery solutions in petroleum fields. For such nanoparticles to be effective, they need to remain well dispersed into the fluid surrounding them. Physicists have now identified the conditions that lead to instability of nanoparticles and producing aggregates.

Link discovered between rare form of anemia, cancer

Posted: 16 Oct 2015 08:54 AM PDT

More than 20 percent of people affected by Diamond-Blackfan anemia, a rare disease, develop various types of tumors throughout their lives. Now researchers have created the first animal model with this type of anemia that also recapitulates the predisposition to cancer. The finding could potentially improve current treatments for this type of anemia, which, to date, are only effective in resolving the hematological disorders.

Scientists find evidence of how incurable cancer develops

Posted: 16 Oct 2015 08:54 AM PDT

Researchers have made a breakthrough in explaining how an incurable type of blood cancer develops from an often symptomless prior blood disorder. The findings could lead to more effective treatments and ways to identify those most at risk of developing the cancer.

Researchers' cure of metastatic skin cancer revealed

Posted: 16 Oct 2015 06:42 AM PDT

Metastatic Merkel-cell carcinoma is often fatal and there is no effective treatment. Now a researcher is reporting some positive results from treating this illness with a drug called idelalisib.

Zebrafish study sheds new light on human heart defects

Posted: 16 Oct 2015 06:41 AM PDT

Researchers working with zebrafish have published a study providing new insights into the causes of the congenital heart defects associated with a rare developmental disorder. The disorder, Cornelia de Lange Syndrome (CdLS), is estimated to occur in up to one in 10,000 births worldwide. CdLS causes a range of developmental anomalies, both physical and cognitive, and up to 70 percent of people with CdLS have congenital heart defects.

Brief interventions in primary care clinics could curb patients' drug use

Posted: 16 Oct 2015 06:41 AM PDT

A few minutes of counseling in a primary care setting could be an effective tool in steering people away from risky drug use, and possibly full-fledged addiction, a new report suggests. The researchers found that this sort of intervention helped patients reduce their risky drug use by one-third.

Genes involved in schizophrenia and obesity highlighted

Posted: 16 Oct 2015 06:41 AM PDT

Genes involved in schizophrenia and obesity have been highlighted in a new study, which could lead to a better understanding of the DNA variants which affect risk of these conditions and aid the development of improved strategies for prevention and treatment.

Inflammation in the brain is linked to risk of schizophrenia, study finds

Posted: 16 Oct 2015 05:49 AM PDT

A new study is the first to find that immune cells are more active in the brains of people at risk of schizophrenia as well as those already diagnosed with the disease.

3D scans spot earliest signs of heart disease

Posted: 16 Oct 2015 05:49 AM PDT

People with high blood pressure develop changes in their hearts even before symptoms appear, new research shows. These changes are known to put people at risk of dying early, and the new work suggests it is possible for doctors to recognize such signs of heart disease earlier than they can today -- by examining detailed images of the heart.

The end is in sight for reading glasses

Posted: 16 Oct 2015 05:49 AM PDT

A researcher is developing a new eye lens, made from the same material found in smartphone and TV screens, which could restore long-sightedness in older people.

DNA sun protection

Posted: 16 Oct 2015 05:48 AM PDT

UV radiation often damages our DNA. Researchers have now seen for the first time what happens in DNA building blocks when they are stimulated by ultraviolet light, and what they do to prevent themselves from being destroyed. The results show the molecules use the absorbed energy to set off a completely harmless reaction which prevents the genes being altered.

Excessive alcohol use continues to be drain on American economy

Posted: 16 Oct 2015 05:48 AM PDT

Excessive alcohol use continues to be a drain on the American economy, according to a study. Excessive drinking cost the U.S. $249 billion in 2010, or $2.05 per drink, a significant increase from $223.5 billion, or $1.90 per drink, in 2006. Most of these costs were due to reduced workplace productivity, crime, and the cost of treating people for health problems caused by excessive drinking.

Study quantifies threat of rising antibiotic resistance on surgery, chemotherapy

Posted: 15 Oct 2015 06:18 PM PDT

Researchers report the strongest evidence yet that rising antibiotic resistance could have disastrous consequences for patients undergoing surgery or cancer chemotherapy. New estimates suggest that up to half of infections after surgery and over a quarter of infections after chemotherapy are caused by organisms already resistant to standard prophylactic antibiotics in the USA.

High cholesterol linked to heightened risk of tendon abnormalities and pain

Posted: 15 Oct 2015 06:18 PM PDT

High levels of total cholesterol are linked to a heightened risk of tendon abnormalities and pain, reveals a pooled analysis of the available evidence.

Catalyst combining reactivity, selectivity could speed drug development

Posted: 15 Oct 2015 03:34 PM PDT

Chemists have long believed that inserting nitrogen -- a beneficial ingredient for making many pharmaceuticals and other biologically active molecules -- into a carbon-hydrogen bond requires a trade-off between catalyst reactivity and selectivity. But a new manganese-based catalyst has given researchers both in one efficient, lower-cost package.

Young Latinos experience discrimination when obtaining health care, research shows

Posted: 15 Oct 2015 02:07 PM PDT

Young Latinos living in rural areas say they face discrimination when they obtain health care services -- a factor that could contribute to disparities in their rates for obtaining medical care and in their health outcomes, a new study has found

COMPASS method points researchers to protein structures

Posted: 15 Oct 2015 02:07 PM PDT

Searching for the precise, complexly folded three-dimensional structure of a protein can be like hacking through a jungle without a map: a long, intensive process with uncertain direction. Researchers developed a new approach, dubbed COMPASS, that points directly to a protein's likely structure using a combination of advanced molecular spectroscopy techniques, predictive protein-folding algorithms and image recognition software.

Green public housing may reduce health risks from environmental pollutants

Posted: 15 Oct 2015 02:07 PM PDT

Low-income housing residents who live in 'green' buildings that are built with eco-friendly materials and energy-efficient features appear to have fewer 'sick building' symptoms than residents of traditionally constructed low-income housing, according to a new study. Asthma outcomes -- hospitalizations, attacks, and missed school days due to asthma -- were also significantly lower for children living in the green buildings.

Doctors call on hospitals to oppose the overuse of antibiotics in animal agriculture

Posted: 15 Oct 2015 02:07 PM PDT

To help stop the spread of antibiotic resistance, scientists are urging hospitals around the country to stop buying meat from animals that were given antibiotics for growth promotion.

Introducing the mighty panoramix: Defender of genomes

Posted: 15 Oct 2015 11:47 AM PDT

To protect future generations against genomic havoc, defects in innate defense systems usually result in sterility. In animals, the main defense against troublemaking transposons is the Piwi-interacting RNA pathway. A team has identified a protein the Piwi system uses to guide a cell's gene-silencing machinery to the right spots in the genome, allowing it to keep transposons in check. They call the protein Panoramix, after a comic book character who endows others with great power.

Self-esteem among young women undergoing facial plastic surgery in China

Posted: 15 Oct 2015 08:47 AM PDT

A study of young women in China undergoing cosmetic surgery on their eyelids and noses suggests feelings of self-esteem and self-efficacy (confidence in one's abilities) were lower before surgery but increased in the months after surgery, according to an article.

Patients with lower income less likely to participate in clinical trials

Posted: 15 Oct 2015 08:47 AM PDT

Patients newly diagnosed with cancer were less likely to participate in clinical trials if their annual household income was below $50,000, according to an article.

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