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Science News Archive September 2015 - Page 15


Page 15 of 35

DNA sequencing improved by slowing down

EPFL scientists have developed a method that improves the accuracy of DNA sequencing up to a thousand times by slowing down the process using nanopores and viscous liquids. This breakthrough paves the way for better and cheaper DNA sequencing, enabling scientists to detect mutations and identify different organisms with greater precision.

SourceEcole Polytechnique Fédérale de Lausanne·JournalNature Nanotechnology·DateSep 21, 2015

Risk of stroke at time of carotid occlusion

A study published in JAMA Neurology found that patients with asymptomatic carotid stenosis are not significantly harmed by medical therapy and may even benefit from more intensive treatment. The study's findings suggest that preventing carotid occlusion may not be a valid indication for stenting or endarterectomy.

SourceJAMA Network·JournalJAMA Neurology·DateSep 21, 2015

Mice exposed to environmental chemicals may show decreased physical activity in offspring

A University of Missouri study found that female mice exposed to endocrine disruptors like BPA and EE showed decreased physical activity in their daughters, which can predispose them to obesity and other metabolic disorders. The chemicals can affect metabolism, energy expenditure, and voluntary exercise patterns.

SourceUniversity of Missouri-Columbia·JournalJournal of Developmental Origins of Health and Disease·DateSep 21, 2015

Targeting DNA

A modular system of proteins can detect a specific DNA sequence in a cell and trigger a response, such as cell death. The system can be customized to detect any DNA sequence and trigger a desired response, including killing cancer cells or cells infected with a virus.

SourceMassachusetts Institute of Technology·JournalNature Methods·DateSep 21, 2015

Stem cell-derived 'organoids' help predict neural toxicity

A team of scientists developed a new system using stem cells to model features of the developing human brain that could be targeted by toxic chemicals or drugs. The approach, described in PNAS, uses machine learning to build a predictive model from RNA sequencing data collected from neural tissue constructs exposed to different chemicals.

SourceMorgridge Institute for Research·JournalProceedings of the National Academy of Sciences·DateSep 21, 2015

Maternal protein deficiency during pregnancy 'memorized' by fetal muscle cells

A study found that inadequate protein intake during pregnancy activates a genetic pathway leading to muscle atrophy and autophagy in the fetus. This can result in low birth weight and stunted growth in male offspring, increasing the risk of chronic health problems such as cardiovascular disease and Type 2 diabetes.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalBritish Journal Of Nutrition·DateSep 18, 2015

Captain Trevor Greene partners with SFU to walk again

Trevor Greene, a former Canadian soldier who survived a debilitating brain injury in Afghanistan, has recovered his ability to walk again with the help of a customized exoskeleton. Dr. Ryan D'Arcy's research team discovered that physical functions can be recovered through rehabilitation even six years after an injury.

SourceSimon Fraser University·JournalJournal of Head Trauma Rehabilitation·DateSep 18, 2015

Repairing the brain

Research led by Duke-NUS scientists has linked abnormal behavior of BDNF and DTNBP1 genes to the underlying cause of schizophrenia. By understanding how these genes interact, researchers have identified potential treatments that could rescue signalling balance in the brain, offering new hope for schizophrenia patients.

SourceDuke-NUS Medical School·JournalBiological Psychiatry·DateSep 18, 2015

Western University hopes to use artificial intelligence to improve breast cancer patient outcomes

Western University researchers have developed an artificial intelligence-powered tool that can predict a patient's response to paclitaxel and gemcitabine chemotherapy medications. The tool uses genetic analysis of tumours to identify the genetic signatures most important for determining resistance and remission for each medication. Wit...

SourceUniversity of Western Ontario·JournalMolecular Oncology·DateSep 18, 2015

Southern Ocean: Reconstructing environmental conditions over the past 30,000 years

Researchers reconstruct environmental conditions in the Southern Ocean over the past 30,000 years, showing that seasonal sea-ice zones had significant influences on ecosystems and carbon cycling. The study reveals that nutrient-rich waters allowed phytoplankton to store CO2, contributing to global cooling during ice ages.

AFL, NRL, and cricket promoting alcohol to children

New research from Monash University finds that Australian children and adolescents receive millions of exposures to alcohol advertising during daytime TV viewing of AFL, NRL, and Cricket. The study suggests removing a clause allowing alcohol advertising during daytime in sport could halve children's exposure.

SourceMonash University·JournalDrug and Alcohol Review·DateSep 18, 2015

58,046 fruit flies shed light on 100-year old evolutionary question

Researchers found that artificial breeding created extreme wing shape and size relationships in fruit flies, but natural selection corrected these changes within just 15 generations. This study suggests that evolution is constrained by fundamental biological processes, such as developmental links between traits.

SourceNorwegian University of Science and Technology·JournalProceedings of the National Academy of Sciences·DateSep 18, 2015