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Science News Archive February 2004 - Page 4


Page 4 of 11

The future of drug development

Researchers Hubbard and Love propose a new system for funding drug development, separating R&D and product markets. This could lead to greater openness in drug research, reduced prices, and expanded access to new medicines.

SourcePLOS·JournalPLOS Biology·DateFeb 17, 2004

American Thoracic Society Journal news tips for February 2004 (second issue)

A study of influenza vaccination in children with asthma found no significant reduction in asthma exacerbations caused by the flu. In contrast, a separate study showed that maternal and personal smoking synergize to increase airflow limitation in offspring, increasing the risk of Chronic Obstruction Pulmonary Disease (COPD).

SourceAmerican Thoracic Society·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateFeb 17, 2004

DHEA boosts growth rate of human neural stem cells

Researchers at the University of Wisconsin-Madison have found that DHEA significantly increases the division of human neural stem cells, leading to increased neurogenesis. The study's findings provide direct evidence of DHEA's effects on critical human cells, shedding light on the hormone's potential benefits and risks.

SourceUniversity of Wisconsin-Madison·JournalProceedings of the National Academy of Sciences·DateFeb 17, 2004

Point well taken

Researchers found that referential gesturing improves identification of targets and reduces verbal cues when participants can see each other. The study published in Psychological Science shows that pointing facilitates the use of verbal descriptions by focusing the audience's gaze on a specific subregion of shared visual space.

SourceAssociation for Psychological Science·JournalPsychological Science·DateFeb 17, 2004

AGU Journal Highlights - 17 February 2004

Scientists found a possible link between increasing greenhouse gases and European heat waves, while also studying the transfer of energy from earthquakes through Earth's formations. Additionally, research revealed the Amazon River's strong impact on tropical Atlantic carbon levels and new insights into Martian drainage basins that may ...

SourceAmerican Geophysical Union·JournalGeophysical Research Letters·DateFeb 17, 2004

Hormone found to protect bones

A Baylor College of Medicine study reveals that the hormone amylin inhibits bone loss and resorption. Mice without amylin have less bone mass due to increased bone destruction, suggesting a potential therapeutic avenue for preventing osteoporosis in Type 1 diabetes patients.

SourceBaylor College of Medicine·JournalJournal of Cell Biology·DateFeb 16, 2004

How much is too much VEGF?

Researchers at Stanford University found that microenvironmental VEGF concentration determines the threshold between normal and aberrant blood vessel growth. Long-term continuous delivery of VEGF maintains below this threshold promotes normal angiogenesis, guiding therapeutic strategies.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 16, 2004

Models help estimate children's exposure to toxins

Stanford University researchers use video cameras to capture daily activities of healthy children in various environments. By analyzing these recordings, they create detailed models of how children ingest or become exposed to substances like lead and pesticides. This approach allows for the collection of tens of thousands of data point...

Hair dye use increases risk of non-Hodgkin's lymphoma

A Yale University study found an increased risk of non-Hodgkin's lymphoma among women who began using hair-coloring products before 1980, particularly those using darker permanent products for over 25 years. The study suggests that recent changes in hair dye formula contents may have reduced the risk for newer users.

SourceYale University·JournalAmerican Journal of Epidemiology·DateFeb 16, 2004

Flies offer clues to anesthesia-resistant memory

Researchers discovered that the radish gene encodes a phospholipase-A2 enzyme, which plays a crucial role in anesthesia-resistant memory. The study found this enzyme is also involved in memory formation in chickens and rodents, suggesting a conserved mechanism across animal phyla.

SourceCell Press·JournalCurrent Biology·DateFeb 16, 2004

JCI table of contents, 16 February 2004

The calcium-sensing receptor plays a crucial role in regulating mammary gland function, influencing milk production and composition. This study demonstrates that the receptor helps match milk production with available calcium levels in the mother's body.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 16, 2004

Possible mechanism for link between diabetes and Alzheimer's disease discovered

Research at Joslin Diabetes Center reveals that insulin resistance in the brain may contribute to the development of Alzheimer's disease. Studies using genetically altered mice found a marked reduction in insulin signaling proteins, leading to excessive phosphorylation of tau protein, a hallmark of brain lesions in Alzheimer's.

SourceJoslin Diabetes Center·JournalProceedings of the National Academy of Sciences·DateFeb 16, 2004

Exercise sharpens focus, decision-making among aging adults

A six-month aerobic exercise program improved cognitive performance on a decision-making task in older adults by reducing behavioral conflict. The study used functional magnetic resonance imaging to measure changes in brain activity in middle-frontal and superior parietal regions, which were associated with improved performance.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateFeb 16, 2004

Relearning to hear

Researchers found that gradual exposure to frequency-shifted sounds improved subject's ability to comprehend speech in cochlear implants. Brain scans revealed systematic changes in cortical responses after several hours of exposure.

Neurons so excited that they just can't hide it

A study found that mice with silenced small-conductance calcium-activated potassium (SK) channels in the DCN had increased firing rates and ataxia. Despite this, Purkinje cell input into the DCN remained intact, indicating a direct relationship between SK channel regulation and proper muscle coordination.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 16, 2004