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Science News for October 16, 2013


When neurons have less to say, they speak up

In a breakthrough study, researchers found that brain neurons can regulate their own activity to maintain a constant level of activity even after significant changes, such as sensory organ loss. This allows for regeneration and adaptation, essential for healthy brain function and recovery from injury.

SourceMax-Planck-Gesellschaft·JournalNeuron·DateOct 16, 2013

The brain's neural thermostat

Researchers at Brandeis University observed a neural firing-rate set point in neocortical neurons, which remains stable even during sensory deprivation or sleep. This homeostatic mechanism could lead to new approaches for neurological disorders.

SourceBrandeis University·JournalNeuron·DateOct 16, 2013

Farm and germ education go hand in hand

A study published in PLOS ONE found that interactive farm hygiene lessons improved students' knowledge of germ spread and prevention, especially among girls. The lesson increased post-lesson scores by 21% for girls and 14% for boys, with a total increase of 13% in hand-to-mouth behavior awareness.

SourcePLOS·JournalPLOS ONE·DateOct 16, 2013

Women, STEM and stereotypes

Researcher Chad Forbes aims to understand how stereotype threat impacts women in STEM fields, leading to job dissatisfaction and decreased performance. He's using a combination of neuroscience and social psychology to develop strategies to reverse this trend.

For celebrated frog hops, scientists look to Calaveras pros

Researchers from Brown University traveled to Calaveras County to study the Guinness Book of World Records' top frog jumper, Rosie the Ribeter. They found that bullfrogs at the Jubilee surpassed the old research-grade mark of 1.3 meters a striking 58 percent of the time, with jumps reaching up to 2.2 meters.

SourceBrown University·JournalJournal of Experimental Biology·DateOct 16, 2013

Defining the graphene family tree

A recommended nomenclature for 2D carbon materials has been published by the Editorial Board of Journal Carbon, aiming to standardize definitions and promote precise ideas. The new guidelines suggest using 'graphene materials' as an overarching term, including morphological descriptors for shape and size.

SourceElsevier·JournalCarbon·DateOct 16, 2013

Chimpanzees: Alarm calls with intent?

A study by University of York scientists has found that wild chimpanzees produce alarm calls intentionally to warn others of danger, similar to human language. The research suggests that language may have originated from a multimodal vocal-gestural communication system.

SourceUniversity of York·JournalPLOS ONE·DateOct 16, 2013

Pancreatic cancer patient survival 'significantly higher' with nab-paclitaxel, says TGen-led study

The study found that nab-paclitaxel plus gemcitabine led to significantly improved overall survival and progression-free survival compared to gemcitabine alone. Participants who received nab-paclitaxel also experienced a delay in tumor growth and higher survival rates, with 35% surviving over 1 year.

SourceThe Translational Genomics Research Institute·JournalNew England Journal of Medicine·DateOct 16, 2013

A bad break for fake pearls

A team of Swiss researchers has developed a method to extract DNA from cultured pearls, allowing for the identification of species and authentication of luxury jewelry. This technique, which is non-destructive and non-invasive, uses genetic fingerprinting to differentiate between pearls from various oyster species.

SourceETH Zurich·JournalPLOS ONE·DateOct 16, 2013

Light triggers death switch in cancer cells

Researchers at Cardiff University have created a peptide linked to a light-responsive dye that triggers cell death in cancerous cells. The new pathway activation technology, called transient photoactivation, enables scientists to precisely define the area where peptides should act, leading to more effective treatment strategies.

SourceCardiff University·JournalMolecular BioSystems·DateOct 16, 2013

Study suggests: Blood test can differentiate between benign lung nodules and early stage lung cancer

A study suggests that Indi's blood test can accurately distinguish between benign lung nodules and early-stage lung cancer by detecting a specific combination of proteins in the blood. The test, powered by advanced protein detection technology, has a 90% accuracy rate and could complement current clinical risk factors.

SourceIndi (Integrated Diagnostics)·JournalScience Translational Medicine·DateOct 16, 2013

Health Affairs looks at economic trends & quality trade-offs

A new study published in Health Affairs examines the pursuit of improved physical and mental health through various initiatives, including expanding home-delivered meal programs for seniors. The study also explores the economic benefits of biosimilars and how delaying aging could increase life expectancy by an additional 2.2 years.

SourceHealth Affairs·JournalHealth Affairs·DateOct 16, 2013

Mice modeling schizophrenia show key brain network in overdrive

Researchers at RIKEN-MIT Center for Neural Circuit Genetics have uncovered a faulty brain mechanism underlying schizophrenia and other psychiatric disorders in humans. Mice genetically engineered to display symptoms of schizophrenia exhibit abnormal neural activity in the default mode network, which processes memories and recall.

SourceRIKEN·JournalNeuron·DateOct 16, 2013

Keep your friends close, but...

A new USC study found that the brain activates more strongly to watching hateful people suffer compared to likable individuals. The 'pain matrix' of the brain is thought to be involved in processing complex social situations, and this study suggests it may prioritize monitoring enemies over loved ones.

SourceUniversity of Southern California·JournalFrontiers in Psychology·DateOct 16, 2013

No increase in sexual risk-taking seen in partners who know they are protected from HIV transmission

A new study published in The Lancet Infectious Diseases found that HIV-negative partners who know they are protected from HIV transmission do not engage in significantly more risky sexual behavior. The researchers analyzed data from over 3,000 participants and found no increase in unprotected sex, despite knowledge of protection.

SourceThe Lancet_DELETED·JournalThe Lancet Infectious Diseases·DateOct 16, 2013

Working to the beat

Researchers found that producing music decreases perceived physical strain and increases muscle effectiveness during exercise. This breakthrough insight sheds light on the therapeutic power of music and its role in human society.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateOct 16, 2013

Finding Alzheimer's disease before symptoms start

Researchers measured levels of proteins in cerebrospinal fluid to predict cognitive impairment, identifying biomarkers that signal potential development of Alzheimer's disease up to five years before symptom onset. The study offers a potential tool for guiding earlier use of treatments and testing new drugs.

SourceJohns Hopkins Medicine·JournalNeurology·DateOct 16, 2013

Misinterpretation of study

A study published in the journal Physiology & Behavior found that cats from multi-cat households do not exhibit higher stress levels than those from single-cat households. The researchers discovered that a cat's personality, as classified by its owner, plays a significant role in determining its stress response to stroking.

SourceUniversity of Veterinary Medicine -- Vienna·JournalPhysiology & Behavior·DateOct 16, 2013

Tracking viral DNA in the cell

A new method developed by researchers at the University of Zurich allows them to display viral DNA in host cells at single-molecule resolution, revealing unexpected insights into its distribution and cell response. The technique uses click chemistry to label viral DNA without affecting its biological functions, enabling scientists to s...

SourceUniversity of Zurich·JournalCell Host & Microbe·DateOct 16, 2013

As chimpanzees grow, so does yawn contagion

As chimpanzees grow from infant to juvenile, they develop increased susceptibility to human yawn contagion. Researchers found that yawning but not nose-wiping was contagious for juvenile chimpanzees, while infants found neither contagious. The results suggest a general developmental pattern shared by humans and other animals.

SourcePLOS·JournalPLOS ONE·DateOct 16, 2013

How do ADHD medications work?

Researchers found that methylphenidate and atomoxetine, two FDA-approved ADHD medications, increase brain activation when making fine temporal distinctions. This improvement in brain function is linked to improved behavior in children with ADHD.

SourceElsevier·JournalBiological Psychiatry·DateOct 16, 2013

Genetic mutation linked to Alzheimer's disease doubles rate of brain tissue loss, USC study shows

A new study from the University of Southern California has found that a genetic mutation associated with Alzheimer's disease can double the rate of brain tissue loss. This means that individuals carrying this mutation may experience symptoms earlier than expected, highlighting the need for targeted clinical studies and treatments.

SourceUniversity of Southern California - Health Sciences·JournalNew England Journal of Medicine·DateOct 16, 2013

Just ask the animals!

Researchers used GPS sensors to track fishers' movements and discovered they chose routes that deviated from predicted models, highlighting the importance of considering animal behavior in landscape planning. This approach could lead to more accurate corridor predictions and improved species conservation.

SourceMax-Planck-Gesellschaft·JournalLandscape Ecology·DateOct 16, 2013

Extinct 'mega claw' creature had spider-like brain

Researchers have discovered a 520-million-year-old fossilized nervous system in an extinct marine arthropod, revealing a spider-like brain structure. The ancient creature, Alalcomenaeus, had a central nervous system similar to that of horseshoe crabs and scorpions, linking its ancestors to the modern chelicerates.

SourceUniversity of Arizona·JournalNature·DateOct 16, 2013

Lawsuits increasing over skin-related laser surgery like hair removal performed by non-physicians

A study found that lawsuits related to procedures when non-physicians operate the laser are increasing, particularly outside traditional medical settings. Non-physician operators, including nurse practitioners and medical assistants, were involved in 75.5% of hair removal lawsuits from 2004 to 2012.

Avian influenza virus detection using smell

Scientists at the Monell Chemical Senses Center and USDA have discovered that avian influenza virus can be detected based on odor changes in infected birds. The study identified specific chemical compounds associated with the odor changes, which may also serve as potential biomarkers for diagnosing gastrointestinal diseases in humans.

SourceMonell Chemical Senses Center·JournalPLOS ONE·DateOct 16, 2013