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Science News Archive September 2018 - Page 13


Page 13 of 37

'Gut sense' is hardwired, not hormonal

Scientists have discovered a neural superhighway that enables rapid communication between the gut and brain, contradicting decades of research on hormonal transmission. This breakthrough has profound implications for our understanding of appetite and other gut-related disorders.

SourceDuke University·JournalScience·DateSep 20, 2018

Smartphone, M.D.

A new cell phone app and lab kit enable a smartphone to identify bacteria from patients anywhere in the world, leading to faster recovery and lower treatment costs for patients. The test uses a smartphone's camera to measure a chemical reaction and determines a diagnosis in about an hour.

Full, but still feasting: Mouse study reveals how urge to eat overpowers a signal to stop

A new study explores why people keep eating despite feeling full, showing that two tiny clusters of cells battle for control and the opioid system gets involved. Researchers found that stimulating POMC neurons decreases appetite, while AgRP neurons drive eating when both are activated.

SourceMichigan Medicine - University of Michigan·JournalProceedings of the National Academy of Sciences·DateSep 20, 2018

Researchers identify human skeletal stem cells

Human skeletal stem cells have been isolated from fetal and adult bones, providing a breakthrough in understanding the molecular diagnosis and treatment of skeletal diseases. The discovery enables researchers to create a detailed lineage map of stem-cell-mediated formation of skeletal tissues in humans.

SourceCell Press·JournalCell·DateSep 20, 2018

Affordable Care Act: Study finds surprising gaps in HIV care providers' knowledge

A new study found that over a quarter of HIV medical providers surveyed couldn't say whether their state had expanded Medicaid under the Affordable Care Act. Providers in states that expanded Medicaid were more likely to believe the law would improve HIV outcomes, but all providers agreed it would improve overall healthcare outcomes.

SourceUniversity of Virginia Health System·JournalClinical Infectious Diseases·DateSep 20, 2018

Gut branches of vagus nerve essential components of brain's reward and motivation system

Researchers have identified a novel gut-brain neural circuit establishing the vagus nerve as essential for regulating reward and motivation. The study reveals that stimulating the right branch of the vagus nerve can excite reward neurons in the brain, offering potential targets for therapy for eating and emotional disorders.

Decoding the structure of an RNA-based CRISPR system

Researchers at the Salk Institute have discovered the molecular structure of CRISPR-Cas13d, a promising enzyme for emerging RNA-editing technology. This breakthrough enables scientists to visualize how the enzyme guides and targets RNA, paving the way for new strategies to treat RNA-based diseases.

SourceSalk Institute·JournalCell·DateSep 20, 2018

A one-way street for salt

Researchers have discovered the molecular mechanism behind quinoa's ability to store salt in its bladder cells, allowing it to thrive in saline soils. This unique adaptation enables quinoa to transfer excess salt to final storage sites without harming the plant.

SourceUniversity of Würzburg·JournalCurrent Biology·DateSep 20, 2018

Breaking down backbones

Researchers found that mammal backbones gained distinct regions during evolution, enabling adaptation to various lifestyles such as running, flying, and digging. The study analyzed fossil records and living animals' vertebrae, challenging the notion of specialization in early land animals.

SourceHarvard University·JournalScience·DateSep 20, 2018

The extirpation of species outside protected areas

A study found up to 13 galliform species populations have been extirpated outside protected areas in Sundaland, a region with high biodiversity but biologically degraded landscapes. The researchers argue that effective management of protected areas and connectivity between habitats are crucial for long-term conservation.

SourceUniversity College London·JournalConservation Letters·DateSep 20, 2018

Nerve cells in the human brain can 'count'

Researchers at Universities of Bonn and Tübingen demonstrate that human neurons fire mainly for specific quantities, such as three or four points. The study also shows how we learn to handle number symbols in comparison to quantities, with digit neurons responding differently from quantity neurons.

SourceUniversity of Bonn·JournalNeuron·DateSep 20, 2018

Discomfort or death? New study maps hot spots of child mortality from diarrhea in Africa

A new study has mapped areas across Africa with high concentrations of child deaths from diarrhea, revealing uneven progress over 15 years. The research highlights the need for targeted interventions in local communities to mitigate the problem, as national strategies may be less effective due to regional inequalities.

SourceInstitute for Health Metrics and Evaluation·JournalNew England Journal of Medicine·DateSep 19, 2018

Gaia detects a shake in the Milky Way

The Gaia satellite has detected substructures in the Milky Way's star disk, indicating a 300-million-year-old gravitational disturbance caused by the Sagittarius Dwarf galaxy. Researchers used precise data to analyze shapes and twisting patterns, leading to new findings on galactic archaeology

SourceUniversity of Barcelona·JournalNature·DateSep 19, 2018

Viral RNA sensing

Scientists have created a nanosized sensing probe for RNA molecules using DNA origami and gold nanorods. The probe can detect concentrations as low as 100 picomolar of the target RNA, making it a promising diagnostic tool for viral infections.

SourceWiley·JournalAngewandte Chemie International Edition·DateSep 19, 2018