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Science News for July 30, 2009


A crystal ball for brain cancer?

UCLA researchers developed a new way to scan brain tumors and predict which ones will respond to the drug Avastin before treatment. By linking high water movement in tumors to positive drug response, they predicted with 70 percent accuracy which patients' tumors were the least likely to grow six months after therapy.

New hope for fisheries

A two-year study by international researchers shows that steps taken to curb overfishing are beginning to succeed in five large marine ecosystems, providing new hope for rebuilding troubled fisheries. However, significant work remains to be done, with sixty-three percent of fish stocks still needing to be rebuilt.

Unique immunization method provides insights about protective anti-malaria immune response

Scientists developed a novel immunization method that induces complete protection against the life-threatening malaria parasite in humans. The method allowed the human immune system to target the parasite at an earlier stage of its life cycle, resulting in significant improvement over other experimental malaria vaccines.

SourceAgency for Science, Technology and Research (A*STAR), Singapore·JournalNew England Journal of Medicine·DateJul 30, 2009

Algebra adds value to mathematical biology education

Researchers highlight algebraic models as a crucial tool for undergraduate biologists, allowing them to integrate mathematical modeling into their coursework. These models focus on the logic of network connections, making them accessible to students with limited mathematical background.

SourceVirginia Tech·JournalScience·DateJul 30, 2009

Reducing risk of hospitalization in the elderly

A new study suggests that exercise programs focusing on muscle density can significantly reduce the risk of hospitalization among older adults. By measuring muscle strength and performance rather than size or mass, researchers found a 50% higher relative risk for hospitalizations in those with poor walking abilities.

SourceWiley·JournalJournal of the American Geriatrics Society·DateJul 30, 2009

Drug-proof zebrafish reveal secrets of addiction

Researchers discovered a set of genes that respond inappropriately to amphetamine in 'drug-proof' zebrafish mutants, which do not experience the drug's pleasurable effects. This finding suggests a link between adult neurogenesis and addiction, with potential implications for understanding susceptibility.

SourceBMC (BioMed Central)·JournalGenome Biology·DateJul 30, 2009

Protein level may serve as predictor of severe osteoarthritis

A new study identifies vascular cell adhesion molecule 1 (VCAM-1) as a strong predictor of hip and knee joint replacement due to severe osteoarthritis. Elevated VCAM-1 levels were found in individuals who underwent joint replacement, mirroring active cartilage damage or an inflammatory component in OA.

SourceWiley·JournalArthritis & Rheumatism·DateJul 30, 2009

Evidence of liquid water in comets reveals possible origin of life

A new study published in the International Journal of Astrobiology claims that comets contained vast oceans of liquid water during their formation, providing ideal conditions for primitive bacteria to grow and multiply. The study's findings support the theory of cometary panspermia, which suggests that life was introduced to Earth by c...

SourceCardiff University·JournalInternational Journal of Astrobiology·DateJul 30, 2009

Immune responses to flu vaccine are diminished in lupus patients

Patients with systemic lupus erythematosus (SLE) exhibit diminished immune responses to the flu vaccine, including lower antibody and cell-mediated responses. The study found that vaccination did not induce disease activity, but may increase morbidity and mortality due to influenza infection in these patients.

SourceWiley·JournalArthritis & Rheumatism·DateJul 30, 2009

New test for safer biomedical research results

Researchers developed a 'Multiplex cell Contamination Test' to identify 37 different cell contaminations in a single run, detecting viruses and mycoplasmas with high sensitivity and specificity. The test has been tested in over 700 samples and found frequent contamination rates in some laboratories.

SourceHelmholtz Association·JournalNucleic Acids Research·DateJul 30, 2009

Little lifesavers -- kids capable of CPR

A study published in Critical Care found that 86% of nine-year-old students performed CPR correctly four months after receiving basic life support training. The researchers concluded that children's performance would improve over time with periodic retraining, and that CPR education can be effectively implemented in primary schools.

SourceBMC (BioMed Central)·JournalCritical Care·DateJul 30, 2009