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Science News for February 5, 2013


Tourists face health risks from contact with captive sea turtles

Contact with captive sea turtles poses a risk of exposure to toxic contaminants and zoonotic pathogens, including bacteria, viruses, fungi, and parasites. The study highlights the importance of awareness among health-care professionals and the public to prevent and control the spreading of sea turtle-related disease.

SourceSAGE·JournalJRSM Short Reports·DateFeb 5, 2013

Purification on the cheap

A new process developed by MIT engineers can produce clean water at relatively low cost, making it a crucial step towards U.S. energy independence and addressing the issue of produced water from natural gas wells. The technology has been patented and is expected to be commercially available within two years.

Researchers use new molecular inhibitors to successfully hit difficult cancer target

Researchers developed a small-molecule inhibitor Y16 that blocks a hard-to-target part of a protein complex linked to several types of invasive cancer. The compound, combined with Rhosin/G04, suppresses RhoA cell signaling and downstream molecular events fueling cancer growth in breast cancer cells.

SourceCincinnati Children's Hospital Medical Center·JournalProceedings of the National Academy of Sciences·DateFeb 5, 2013

Mammogram every 2 years has same benefit as yearly mammogram for older women, UCSF study finds

A UCSF study of over 140,000 women aged 66-89 found that biennial screening led to fewer false positives and no increased risk of late-stage breast cancer. The study suggests life expectancy and co-existing illnesses should be considered when making cancer screening recommendations for older women.

SourceUniversity of California - San Francisco·JournalJNCI Journal of the National Cancer Institute·DateFeb 5, 2013

Giving transplanted cells a nanotech checkup

Scientists at Johns Hopkins Medicine have created a way to monitor the survival of transplanted cells using nanoscale pH sensors and MRI machines. This innovation has the potential to revolutionize cell replacement therapies for conditions like liver failure and type 1 diabetes by providing reliable means of detecting dead cells.

SourceJohns Hopkins Medicine·JournalNature Materials·DateFeb 5, 2013

Tendency to fear is strong political influence

Research by Rose McDermott and colleagues found that people with a genetic liability to experience higher levels of social fear tend to support anti-immigration and pro-segregation policies. Education also plays a significant role in shaping out-group attitudes.

SourceBrown University·JournalAmerican Journal of Political Science·DateFeb 5, 2013

Pest uses plant hairs for protection

A tiny insect that eats plants has developed a unique strategy to evade its beetle predator: using the plant's trichomes for physical protection. This clever tactic allows the pest to crawl between the plant hairs and feed on cycad sap, while the larger beetle cannot follow suit.

SourceUniversity of Guam·JournalPlant Signaling & Behavior·DateFeb 5, 2013

Insect drives robot to track down smells

A small robot was driven by a male silkmoth to track down its sex pheromone, demonstrating the potential for insect-inspired odor tracking. The researchers hope to apply this technology to autonomous robots that can detect environmental spills and leaks.

SourceIOP Publishing·JournalBioinspiration & Biomimetics·DateFeb 5, 2013

MicroRNA molecule may serve as biomarker, target for brain metastases in breast cancer patients

Researchers identified miR-7 as a metastasis suppressor that suppressed cancer stem-like cells' ability to metastasize to the brain. The miR-7/KLF4 axis played a critical role in cancer stem-like cell brain metastasis, suggesting its potential as a diagnostic or therapeutic target for predicting or treating brain metastases.

SourceAmerican Association for Cancer Research·JournalCancer Research·DateFeb 5, 2013

Growth arrest in prostate cancer

A previously poorly investigated signalling pathway is crucial for prostate cancer cell proliferation, involving the production of cAMP at multiple locations in the cell. Inhibiting the soluble adenylyl cyclase enzyme suppresses cancer cell growth, suggesting a promising new therapeutic approach.

SourceRuhr-University Bochum·JournalJournal of Biological Chemistry·DateFeb 5, 2013

Mitochondrial mutations: When the cell's 2 genomes collide

Scientists at Brown University and Indiana University have traced mitochondrial-nuclear incompatibility in fruit flies to individual nucleotide mutations, revealing how the genetic double whammy makes flies sick. The study highlights the importance of considering both genomes in understanding metabolic diseases.

SourceBrown University·JournalPLOS Genetics·DateFeb 5, 2013

Lower proportion of Medicare patients dying in hospitals

A study analyzing Medicare claims data found a decrease in hospital deaths, but increased ICU stays and healthcare transitions in the last months of life. Hospice use increased from 21.6% to 42.2%, while short hospice stays grew, suggesting that increasing hospice use may not lead to reduced resource utilization.

SourceJAMA Network·JournalJAMA·DateFeb 5, 2013

Evidence that at least 1 mammal can smell in stereo

A study by Kenneth Catania at Vanderbilt University has found that common moles rely on stereo sniffing to detect odor gradients, a skill previously thought to be limited to visual and auditory perception. This discovery opens new avenues for research into the capabilities of other mammals that heavily rely on their sense of smell.

SourceVanderbilt University·JournalNature Communications·DateFeb 5, 2013

21 minutes to marital satisfaction

A brief writing intervention helped couples sustain marital satisfaction by reducing distress from conflicts and improving passion and intimacy. The intervention, which involved just three seven-minute writing exercises, was effective regardless of relationship duration.

SourceNorthwestern University·JournalPsychological Science·DateFeb 5, 2013

Samoan obesity epidemic starts at birth

A new study by Brown University found that Samoan babies experience rapid weight gain in early infancy, which may foreshadow a future trend of obesity in developed nations. The researchers tracked the growth and weight gain of nearly 800 American Samoan babies born between 2001 and 2008.

SourceBrown University·JournalPediatric Obesity·DateFeb 5, 2013

RNA promotes metastasis in lung cancer

Researchers discovered that long non-coding RNA MALAT1 regulates genes involved in metastasis, leading to impaired mobility and tumor growth. By silencing MALAT1, the team found reduced metastasis formation in mice, opening a promising approach for lung cancer treatment.

SourceHelmholtz Association·JournalCancer Research·DateFeb 5, 2013

JSCM publishes issue on NIDRR-funded project on practice-based evidence in SCI rehabilitation

The Journal of Spinal Cord Medicine published the final phase of the SCIRehab Project, which investigated inpatient rehabilitation practices for acute spinal cord injury. The study found associations between interventions and patient outcomes, informing clinical decision-making and guiding clinicians in selecting interventions.

SourceKessler Foundation·JournalJournal of Spinal Cord Medicine·DateFeb 5, 2013

Flexible classroom design saves money, improves flexibility, accessibility of instruction

Researchers at North Carolina State University developed a flexible classroom design that slashes administrative costs while improving engagement and accessibility for students. The design allows instructors to adjust the layout according to student needs, making it easier for students with special needs to participate.

SourceNorth Carolina State University·JournalComputers and Composition·DateFeb 5, 2013

Hospice use rises; So does aggressive care

A recent study found that while more seniors are dying with hospice care than a decade ago, they are increasingly doing so for very few days right after being in intensive care. This suggests that palliative care often happens as an afterthought, and patients may not receive the full measure of comfort and psychological support they need.

SourceBrown University·JournalJAMA·DateFeb 5, 2013

Obesity leads to vitamin D deficiency

A recent study published in PLOS Medicine found a strong association between obesity and vitamin D deficiency. The research, led by Dr Elina Hypponen, used genetic markers to explore the link between body mass index (BMI) and genes associated with vitamin D synthesis and metabolism.

SourceUniversity College London·JournalPLOS Medicine·DateFeb 5, 2013