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Science News for January 8, 2018


'Hide or get eaten,' urine chemicals tell mud crabs

Researchers at Georgia Institute of Technology have identified two urinary chemicals, trigonelline and homarine, that trigger a warning response in mud crabs when exposed to blue crab urine. This finding has implications for understanding ecological balances in marine ecosystems and informing better management of fisheries.

SourceGeorgia Institute of Technology·JournalProceedings of the National Academy of Sciences·DateJan 8, 2018

Camelina oil improves blood lipid profile

A new study from the University of Eastern Finland found that camelina oil reduces overall and LDL cholesterol levels in individuals with impaired glucose metabolism. Camelina oil, rich in alpha-linolenic acid, showed a positive effect on blood cholesterol levels but had no similar effects for fatty or lean fish.

SourceUniversity of Eastern Finland·JournalMolecular Nutrition & Food Research·DateJan 8, 2018

ACA Medicaid expansion resulted in fewer hospital closures, especially in rural areas

The ACA Medicaid expansion was positively associated with improved hospital performance and a reduced likelihood of hospital closure, particularly in rural markets. This is due to increased access to healthcare for previously uninsured adults, resulting in better health outcomes and less need for emergency care from hospitals.

Air pollution alerts without enforceable actions may be inadequate in protecting public health

A study published in The Lancet Planetary Health found that air quality alert programs, like Toronto's, had limited effects on protecting public health. However, the authors suggest that collective and enforceable actions, such as improved urban planning and emission control, may be more effective in reducing health risks from air poll...

SourceThe Lancet·JournalThe Lancet Planetary Health·DateJan 8, 2018

Recreational marijuana legalization: Do more youth use or do youth use more?

A recent Oregon Research Institute study found that recreational marijuana legalization had no significant effect on the number of youth who used marijuana, but increased the frequency of use among those already using it. The study suggests that community sales policies may not reduce teenage marijuana use and highlights the need for p...

SourceOregon Research Institute·JournalPsychology of Addictive Behaviors·DateJan 8, 2018

One-step production of aromatic polyesters by E. coli strains

Researchers developed a novel strategy to produce aromatic polyesters from Escherichia coli strains using microbial fermentation and synthetic biology. The engineered E. coli strain can produce various high-valued aromatic polyesters from renewable biomass, offering a sustainable alternative for the bio-plastic industry.

How prevalent is severe obesity among young children enrolled in WIC?

A recent study found modest declines in severe obesity prevalence among young children enrolled in the Special Supplemental Nutrition Program for Women, Infants and Children (WIC), suggesting progress in addressing this public health concern. The study analyzed data from 22.6 million children aged 2-4 and reported an increase in obesit...

SourceJAMA Network·JournalJAMA Pediatrics·DateJan 8, 2018

Self-defense for plants

Researchers found that SOBER1, a plant protein, removes acetyl groups added by bacterial proteins, preventing the plant's immune response. This discovery could lead to strategies to boost plants' natural immunity or contain infections threatening agricultural crops.

SourceSalk Institute·JournalNature Communications·DateJan 8, 2018

Interactions between simple molecular mechanisms give rise to complex infection dynamics

A team of scientists discovered that beneficial viruses can integrate into bacteria carrying restriction-modification systems, which protect them from lethal infections. The study showed that these systems offer a temporary respite, allowing bacterial populations to grow and increasing the chances of acquiring beneficial viruses.

SourceInstitute of Science and Technology Austria·JournalNature Ecology & Evolution·DateJan 8, 2018

Nutrition Today publishes expert commentary on high-quality carbohydrates and physical performance

A report on high-quality carbohydrates and physical performance suggests that balanced diets rich in natural, carbohydrate-rich foods like potatoes may be optimal for improving athletic performance. The report aligns with decades of studies showing the primary importance of carbohydrates in sustaining and improving athletic performance.

SourceFleishman-Hillard, Inc.·JournalNutrition Today·DateJan 8, 2018

A biological solution to carbon capture and recycling?

Scientists at the University of Dundee developed a process that enables E. coli bacterium to act as an efficient carbon capture device, converting CO2 into formic acid with high efficiency and speed. This breakthrough could lead to a new way to store or recycle carbon dioxide, a key solution to global warming.

SourceUniversity of Dundee·JournalCurrent Biology·DateJan 8, 2018

How bacteria turbocharged their motors

Researchers at Imperial College London have discovered how bacteria evolved molecular motors to optimize their swimming. By building a 'family tree' of bacterial motors using 3D imaging and DNA analysis, the team found that sophisticated species had more stators than primitive species, with some having as many as 17 stators.

SourceImperial College London·JournalScientific Reports·DateJan 8, 2018

Climate warming and host-parasite dynamics

Researchers developed an epidemiological model to study the effect of climate warming on host-parasite dynamics in Eurypanopeus depressus and its parasitic barnacle Loxothylacus panopaei. Infection prevalence declined at a 1°C temperature increase, with localized extinction occurring at 2°C warming in the southeastern United States.

SourceProceedings of the National Academy of Sciences·JournalProceedings of the National Academy of Sciences·DateJan 8, 2018

Gene test to predict breast cancer recurrence less cost effective in real world practice

A new study by Georgetown University Medical Center researchers found that a widely used gene expression profile test to predict breast cancer recurrence is less cost-effective in real-world practice. The test, Oncotype DX, was initially considered cost-effective but its accuracy and implementation in community settings make it less so.

SourceGeorgetown University Medical Center·JournalJournal of Clinical Oncology·DateJan 8, 2018

Feel anxious? Have trouble sleeping? You may be traveling for business too often

A study by Columbia University's Mailman School of Public Health found that frequent business travelers experience more symptoms of anxiety and depression. The study also showed a link between extensive business travel and unhealthy behaviors like smoking, sedentary behavior, and substance abuse.

SourceColumbia University's Mailman School of Public Health·JournalJournal of Occupational and Environmental Medicine·DateJan 8, 2018

Improved blood stabilization should expand use of circulating tumor cell profiling

A new blood stabilization method developed at Massachusetts General Hospital significantly prolongs the lifespan of circulating tumor cells (CTCs) in whole blood samples. This approach allows for the preservation of high-quality RNA suitable for demanding molecular assays, opening up potential for personalized drug testing and expandin...

SourceMassachusetts General Hospital·JournalNature Communications·DateJan 8, 2018

Swallowable sensors reveal mysteries of human gut health

The ingestible capsule detects and measures gut gases, revealing a potentially new immune system and mechanisms in the human body that have never been seen before. The technology offers a game-changer for gastrointestinal disorders and could lead to fewer invasive procedures like colonoscopies.

SourceRMIT University·JournalNature Electronics·DateJan 8, 2018

Ibuprofen and testicular health

Researchers found that ibuprofen modified hormonal profiles through selective transcriptional repression of testicular endocrine cells, leading to a state of compensated hypogonadism. The study used testis explants and human steroidogenic cell lines to investigate the effects of ibuprofen on testicular health.

SourceProceedings of the National Academy of Sciences·JournalProceedings of the National Academy of Sciences·DateJan 8, 2018

Uncovering the power of glial cells

Researchers have found that brain implants can function with the help of glial cells, which are often overlooked as a potential target for treatment. The study suggests that glial cells play a critical role in maintaining optimal brain activity and suggest targeting them may improve current treatments for neurological diseases.

SourceUniversity of Pittsburgh·JournalNature Biomedical Engineering·DateJan 8, 2018