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Science News for December 12, 2007


Walking tall to protect the species

Researchers propose that carrying heavy infants safely on two legs may have driven the emergence of bipedalism. The study found a relationship between infant weight, hair friction and body angle that prevents safe carrying.

SourceSpringer·JournalZeitschrift für Didaktik der Naturwissenschaften·DateDec 12, 2007

Immune compound blocks virus' ability to hijack antibodies

Researchers at Washington University School of Medicine have identified a blood-borne immune system compound that suppresses antibody-dependent enhancement (ADE) of infection, a phenomenon linked to some viral disease outbreaks. C1q, a key immune compound, blocks ADE by blocking the virus' ability to hijack antibodies.

SourceWashU Medicine·JournalCell Host & Microbe·DateDec 12, 2007

Chronic knee pain: Is surgery the only solution?

A new study published in BMC Medicine suggests that patients with chronic patellofemoral syndrome may not benefit from arthroscopic surgery, instead finding relief through therapeutic exercise. The randomized controlled trial compared the efficacy of arthroscopy and exercise in reducing knee pain and improving mobility.

SourceBMC (BioMed Central)·JournalBMC Medicine·DateDec 12, 2007

How size matters

Researchers at Norwich BioScience Institutes discover that cells at the margins of leaves and petals secrete a mobile growth signal controlling size. This signal is distinct from classical plant hormones, influencing leaf division until a certain threshold is reached.

SourceNorwich BioScience Institutes·JournalDevelopmental Cell·DateDec 12, 2007

Why the switch stays on

Researchers found that a specific protein-protein interaction, involving the rogue Ras protein and its binding partner Raf, blocks the switch from being turned off, leading to uncontrolled cell proliferation. The study resolves a paradox in the behavior of Ras mutants in cells versus solution.

SourceNorth Carolina State University·JournalStructure·DateDec 12, 2007

Zebrafish study shows key enzyme in gut is a peacemaker

Researchers at the University of Oregon have discovered that an enzyme called intestinal alkaline phosphatase plays a crucial role in maintaining balance between gut bacteria and cells, preventing excessive inflammation. This finding has implications for understanding and treating inflammatory bowel diseases such as Crohn's disease and...

SourceUniversity of Oregon·JournalCell Host & Microbe·DateDec 12, 2007

Predicting growth hormone treatment success

Researchers developed a mathematical model predicting optimal growth hormone dose for children with abnormal growth, showing improved predictive accuracy. The model uses data on birth weight, height before and during treatment, and blood hormone levels to determine individual response.

SourceBMC (BioMed Central)·JournalBMC Medical Informatics and Decision Making·DateDec 12, 2007

Too much fructose could leave dieters sugar shocked

University of Florida researchers propose using a fructose index to gauge how healthy foods are; starch-based foods like potatoes and rice may be relatively safe compared to sugar-based foods. Dieters should limit fructose intake, as excessive consumption can cause obesity and metabolic syndrome.

SourceUniversity of Florida·JournalEuropean Journal of Nutrition·DateDec 12, 2007

Mayo Clinic article offers data about shingles virus

New research from the Mayo Clinic suggests that shingles and its complications may have a greater impact on healthy adults than previously thought. The study found that shingles affects at least 1 in every 278 adults each year, with post-herpetic neuralgia being the most common complication, especially among older adults.

SourceMayo Clinic·JournalMayo Clinic Proceedings·DateDec 12, 2007

'Retrospective rubber' remembers its old identities

Researchers at the University of Rochester developed a new class of transparent, rubbery shape-memory polymers that can be controlled to change shape in response to temperature. This material has potential applications as diverse as biomedical implants, conformal face-masks, self-sealing sutures, and smart labels.

SourceUniversity of Rochester·JournalAdvanced Materials·DateDec 12, 2007

New technique could dramatically lower costs of DNA sequencing

Researchers at the University of Illinois have developed a method for sequencing DNA using nanopores, which could lead to a device that reads human genomes quickly and affordably. The technique produces an electrostatic fingerprint that can be used to read the genetic sequence, enabling precise diagnosis and tailored treatment procedures.

Making gas out of crude oil

A team of scientists has identified a biological process that breaks down crude oil into methane, offering a more energy-efficient and environmentally friendly way to produce natural gas. This breakthrough could increase oil sands production by recovering clean-burning methane directly from deeply buried deposits.

SourceUniversity of Calgary·JournalNature·DateDec 12, 2007

Pioglitazone lowers cardiovascular risk in diabetic patients with kidney disease

Chronic kidney disease significantly increases the risk of cardiovascular events in diabetic patients. Pioglitazone has been shown to lower this risk, particularly among those with moderate to severe renal disease. The study found that pioglitazone reduced all-cause death, myocardial infarction, and stroke by one-third.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateDec 12, 2007

Turkish health workers condone wife beating

A survey of medical staff in Turkey found that a majority condoned physical violence against wives, with inadequate training and knowledge gaps in reporting domestic violence. Healthcare workers reported being aware of clinical signs but lacked detailed understanding of legal procedures and proper interventions.

SourceBMC (BioMed Central)·JournalBMC Public Health·DateDec 12, 2007

Wind power explored off California's coast

A Stanford University study examines California's coast for offshore wind energy potential, estimating that a Northern California site could supply 5% of the state's electricity. However, high water depths and varying wind speeds make it challenging to harness wind power off the coast.