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Science News Archive October 2011


Page 1 of 28

DNA origami

Duke University researchers have developed a reusable DNA chip that can synthesize multiple batches of DNA building blocks and fold them into unique nanostructures. They successfully reused the chip tens of times without significant degradation, paving the way for applications in synthetic biology, drug delivery, and nanotechnology.

Fast new method for mapping blood vessels may aid cancer research

Researchers have developed a fast new method for mapping blood vessels that could aid cancer research by analyzing the vascular network of organs in less than two days. The technique uses knife-edge scanning microscopy to create detailed 3D maps of blood vessels, from arteries and veins to smallest capillaries.

SourceOptica·JournalBiomedical Optics Express·DateOct 31, 2011

No higher risk of breast cancer for women who don't have BRCA mutation but have relatives who do

Researchers found that women related to a patient with a hereditary breast cancer mutation but without the mutation themselves have no increased risk. The study settles a controversy and supports current practice guidelines advising non-carriers on no additional risk attributable to their family-specific BRCA1 or BRCA2 mutation.

SourceStanford Medicine·JournalJournal of Clinical Oncology·DateOct 31, 2011

ACP recommends new approach to prevent venous thromboembolism in hospitalized patients

The American College of Physicians recommends that doctors assess the risk of venous thromboembolism and bleeding in patients hospitalized for medical illnesses, such as stroke, before initiating therapy to prevent VTE. Heparin or related blood thinners are prescribed unless the assessed risk of bleeding outweighs likely benefits.

SourceAmerican College of Physicians·JournalAnnals of Internal Medicine·DateOct 31, 2011

Forests not keeping pace with climate change

A new Duke University-led study reveals that more than half of eastern US tree species are not adapting to climate change as quickly or consistently as predicted. The research found that nearly 59% of the species examined showed signs of range contraction, while only 21% appeared to be shifting northward.

SourceDuke University·JournalGlobal Change Biology·DateOct 31, 2011

Moffitt Cancer Center researchers find regulatory T-cell clue to help prevent GVHD

Researchers at Moffitt Cancer Center have found a way to 'expand' regulatory T-cell (Treg) cells to prevent graft-versus-host disease (GVHD), a serious risk in many cell transplants. The new method uses dendritic cells to activate Tregs, offering a potential breakthrough in preventing GVHD while sparing beneficial immune responses.

Shared genes with Neanderthal relatives not unusual

A recent study published in PNAS reveals that people in East Asia carry genetic material from Denisovans, a previously unknown archaic human relative. This finding suggests that gene flow between humans and Denisovans occurred on the Asian mainland, contradicting previous theories about hybridization events.

SourceUppsala University·JournalProceedings of the National Academy of Sciences·DateOct 31, 2011

Yoga aids chronic back pain sufferers

A study led by the University of York found that a specially-designed 12-week yoga programme improved back function and confidence in people with chronic lower back pain. After nine months, participants continued to experience benefits, including increased ability to perform daily activities.

SourceUniversity of York·JournalAnnals of Internal Medicine·DateOct 31, 2011

Targeting leg fatigue in heart failure

Researchers at the University of Leeds have discovered that leg muscle dysfunction is related to the severity of symptoms in heart failure patients. Daily activity in these patients can be limited by impaired leg muscles, not just a failing heart.

SourceUniversity of Leeds·JournalJournal of Applied Physiology·DateOct 31, 2011

Don't worry, be happy – understanding mindfulness meditation

Research suggests that mindfulness meditation can have wide-ranging effects on well-being, including improved immune function and reduced blood pressure. A new framework approach explains the mechanisms of mindfulness by identifying four key components: attention regulation, body awareness, emotion regulation, and sense of self.

SourceAssociation for Psychological Science·JournalPerspectives on Psychological Science·DateOct 31, 2011

New findings could lower risk of suicide in men with prostate cancer

A study by Thordis Thorsteinsdottir found that men with prostate cancer are twice as likely to commit suicide, but a method called expressive writing can reduce this risk. Expressive writing involves getting the men affected to spend 20 minutes writing down their feelings on at least three occasions after getting their cancer diagnosis.

SourceUniversity of Gothenburg·JournalScandinavian Journal of Urology and Nephrology·DateOct 31, 2011

Lawson proves real people drive research

The HealtheSteps program is designed to provide tailored exercise prescriptions and support to residents of Huron County, where rates of cardiovascular disease are higher than average. By engaging with the local community through evidence-based research and community consultations, Dr. Robert Petrella and his team aim to reduce health ...

Antibiotics may not be only cause of community-acquired clostridium difficile infection

Researchers found that antibiotics are not the sole risk factor for community-acquired Clostridium difficile infection and that nursing home residence is a strong predictor of disease severity. The study identified increasing age, higher Charlson Comorbidity index, and lack of antibiotic exposure as predictors of hospitalization.

SourceAmerican College of Gastroenterology·JournalThe American Journal of Gastroenterology·DateOct 31, 2011

Cold chemistry

Researchers find that icy dust specks on interstellar clouds can speed up chemical reactions, forming complex organic molecules. This discovery sheds light on the origins of life in the Universe, suggesting that these dust grains may play a crucial role in seeding galaxies with chemical potential for life.

Not all women in breast cancer families share high risk

A new international study found that women without genetic mutations but closely related to those who do have them are at an average risk of developing breast cancer. This contradicts previous claims that all women in such families share a high risk, according to Professor John Hopper from the University of Melbourne.

SourceUniversity of Melbourne·JournalJournal of Clinical Oncology·DateOct 31, 2011

Live longer with fewer calories

Researchers at the University of Gothenburg have identified an enzyme required for caloric restriction to work effectively, which can slow down ageing and delay the development of age-related diseases. Increasing the production of another enzyme, Srx1, repairs damaged Prx1, potentially counteracting genetic defects and cancer.

SourceUniversity of Gothenburg·JournalMolecular Cell·DateOct 31, 2011

Not your mother's birth control, same troubles

A new Indiana University study found that hormonal birth control can still hamper women's sexual satisfaction, including arousal, lubrication, and orgasm. The research involved over 1,100 women using different forms of contraception and suggests that non-hormonal options like lubricants may help alleviate negative effects.