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Science News for October 10, 2011


Secret of safe sprout production is very clean seeds, expert says

A University of Illinois study found that cleanliness of seeds is crucial in preventing foodborne pathogens in radish, broccoli, and alfalfa sprouts. The study suggests that industry attention to seed cleanliness can help eliminate E. coli and other microorganisms during germination and sprouting.

JCI online early table of contents: Oct. 10, 2011

Studies reveal the role of Sirt1 in improving insulin sensitivity through caloric restriction. Researchers also identify a potential treatment approach for KRAS mutant colorectal cancers by combining receptor tyrosine kinase inhibitors with MEK inhibitors. Additionally, new insights into the cellular defects of Huntington disease are p...

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 10, 2011

Seeking superior stem cells

Researchers developed a new method for reprogramming human cells into stem cells, increasing efficiency by 100-fold and producing high-quality cells faster. This breakthrough has potential applications in medicine, such as organ replacement, bone replacement, and treatment of neurodegenerative diseases.

SourceWellcome Trust Sanger Institute·JournalProceedings of the National Academy of Sciences·DateOct 10, 2011

Light can detect pre-cancerous colon cells

Researchers at Duke University have developed a technology that uses angle-resolved low coherence interferometry to detect pre-cancerous cells in the colon. The device shines short bursts of light into tissue samples and analyzes scattered light for signs of dysplasia, with an accuracy rate of 85%.

SourceDuke University·JournalJournal of Biomedical Optics·DateOct 10, 2011

The next stage of heart function testing

A new technique measures myocardial perfusion reserve and volume reserve to predict severe stenosis in coronary arteries. This method detects 50% or greater narrowing with excellent sensitivity, enabling timely intervention for high-risk patients.

SourceSpringer·JournalEuropean Radiology·DateOct 10, 2011

2 seemingly unrelated phenomena share surprising link

Researchers at University of Chicago and Tel Aviv University found a connection between coupled pendulums and compressed elastic films, which concentrate energy into discrete packets called solitons. Solitons are also found in other realms, such as telecommunications, where they travel through optical fibers.

SourceUniversity of Chicago·JournalPhysical Review Letters·DateOct 10, 2011

Gene signature predicts oral cancer recurrence

Researchers have identified a four-gene signature that accurately predicts which patients are at higher risk of oral cancer recurrence. The signature contains genes related to cell invasion and is indicative of an increased risk of recurrence even in patients with no visible signs of cancer.

SourceBMC (BioMed Central)·JournalBMC Cancer·DateOct 10, 2011

Drug prevents bone loss side effects of breast cancer medication

A new study has found that zoledronic acid can prevent and treat bone loss in postmenopausal breast cancer patients taking aromatase inhibitors. The five-year study showed significant increases in bone density when the drug was administered upfront, but also found that initiating treatment even after bone loss developed was beneficial.

SourceWiley·JournalCancer·DateOct 10, 2011

Peanut allergy turned off by tricking immune system

Researchers have developed a method to create tolerance in the immune system by attaching peanut proteins onto blood cells and reintroducing them. This approach has shown promise in preventing life-threatening allergic reactions. By tricking the immune system, researchers hope to target multiple food allergies at once.

SourceNorthwestern University·JournalThe Journal of Immunology·DateOct 10, 2011

Giant kraken lair discovered

Researchers have discovered a remarkable fossil site in Nevada where the remains of nine 45-foot-long ichthyosaurs suggest an even larger and more cunning sea monster existed: a Triassic kraken. The evidence implies that this ancient cephalopod was capable of intelligent manipulation of bones and preyed on these massive reptiles.

New technique unlocks secrets of ancient ocean

Researchers from Arizona State University developed a new geochemical technique to study the Earth's largest mass extinction event. The study found that the period of oceanic anoxia was much shorter than previously estimated, occurring at most tens of thousands of years before the extinction event.

SourceArizona State University·JournalProceedings of the National Academy of Sciences·DateOct 10, 2011

'SIRT(ain)' benefit of reducing calories

A team of researchers has identified Sirt1 as a crucial protein linking caloric restriction to improved insulin action in skeletal muscle. This finding provides new targets for therapeutics to reduce insulin resistance and lower the risk of developing type 2 diabetes.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 10, 2011

Mayo Clinic study identifies earliest stages of Alzheimer's disease

A Mayo Clinic study recommends adding categories to more effectively identify and treat people with preclinical Alzheimer's disease, a long latent stage of the disease. The researchers suggest two additional sub-groups: Stage 0 (normal biomarkers and no cognitive impairment) and SNAP patients (with suspected non-AD pathophysiology).

SourceMayo Clinic·JournalAnnals of Neurology·DateOct 10, 2011

Researchers study aging's effect on the brain

Research by biologists at the University of York has revealed that under stressful conditions, synapses can grow excessively, potentially contributing to dysfunction. This finding has strong implications for neuronal function as brains age and adds significantly to our understanding of neurodegenerative diseases.

SourceUniversity of York·JournalProceedings of the National Academy of Sciences·DateOct 10, 2011

Combination therapies for drug-resistant cancers

Researchers identified a potential combination therapy to effectively use receptor tyrosine kinases inhibitors for KRAS mutant colorectal cancers by combining with MEK/ERK signaling pathway inhibitors. This approach could offer new treatment options for individuals with KRAS mutant cancers.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateOct 10, 2011