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Science News Archive February 2007 - Page 4


Page 4 of 16

Scientists produce neurons from human skin

Researchers successfully produced neurons in vitro using stem cells from adult human skin, a breakthrough that could lead to revolutionary advances in treating neurodegenerative diseases like Parkinson's. The method used involves extracting neuron precursor cells from skin samples and cultivating them in an appropriate environment.

SourceUniversité Laval·JournalJournal of Cellular Physiology·DateFeb 22, 2007

Drug blocks lethal motor-neuron disease in mice

A study shows that trichostatin A, a hydroxamic acid HDAC inhibitor, increases SMN2 production in both neural tissues and muscles of mice with spinal muscular atrophy, improving survival chances. The treatment attenuates disease symptoms in affected mice.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateFeb 22, 2007

Pigs arrived in biosecure facility

Spring Point Project's biosecure animal facility has successfully bred high-health, pathogen-free pigs, paving the way for potential human islet cell transplantation. The goal is to provide an FDA-approved standard treatment soon after clinical trials within three years.

Killing the messenger RNA -- But which one?

Researchers at The Wistar Institute discovered that microRNAs can undergo molecular editing, redirecting them to target and silence entirely different sets of genes. This process has significant physiological consequences, such as altering the production of essential enzymes involved in synthesizing uric acid.

SourceThe Wistar Institute·JournalScience·DateFeb 22, 2007

Peanut-shaped nanostructures

Japanese scientists produce peanut-shaped nanoparticles comprising two different sulfur-containing substances, palladium sulfide and cobalt sulfide. The unique structure gives rise to different physical and chemical properties.

SourceWiley·DateFeb 22, 2007

Why are African American women more likely than whites to die from breast cancer?

Researchers found that African American women are diagnosed with breast cancer at an average age of 46, compared to 57 for white women. The study proposes that the excess mortality occurs partly because black women are more likely to develop breast cancer before menopause, when surgery may pose a higher risk of stimulating cancer growth.

SourceBoston Children's Hospital·JournalInternational Journal of Surgery·DateFeb 21, 2007

Anti-herpes treatment reduces HIV levels in women infected with both viruses

A trial published in the New England Journal of Medicine found that treating women co-infected with HSV-2 and HIV with anti-herpes treatment significantly reduced HIV levels in genital secretions and plasma. The results suggest a new approach to reducing sexual transmission of HIV from already infected individuals.

SourceLondon School of Hygiene & Tropical Medicine·JournalNew England Journal of Medicine·DateFeb 21, 2007

Older adults may be unreliable eyewitnesses, study shows

A University of Virginia study suggests that older adults are more likely to commit suggestibility errors, where they believe an event occurred when it was suggested, and have high confidence in their recollections even if wrong. This has significant implications for the reliability of older persons' eyewitness testimonies in courtrooms.

SourceUniversity of Virginia·JournalPsychonomic Bulletin & Review·DateFeb 21, 2007

Experimental vaccine given during pregnancy reduces stillbirths from common virus

Researchers developed an experimental vaccine that reduces stillbirths among rodents born to mothers infected with cytomegalovirus, a common virus causing mental retardation and hearing loss. The vaccine was found to greatly reduce the total amount of virus in mothers' blood and mortality rates among offspring.

Honeydew honeys are better antioxidants than nectar honeys

Researchers found that honeydew honeys have greater antioxidant properties than nectar honeys due to their high polyphenol content and other chemical characteristics. The study suggests that honeydew honeys could be a valuable source of natural antioxidants for health benefits.

SourceWiley·JournalJournal of the Science of Food and Agriculture·DateFeb 21, 2007

Biologically inspired sensors can augment sonar, vision system in submarines

Researchers have developed an artificial lateral line that mimics the functions of the biological system found in fish, enabling submarines to detect and track moving targets and avoid collisions. The device uses micro fabricated flow sensors integrated with metal-oxide-superconductor circuitry for on-chip signal processing.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalProceedings of the National Academy of Sciences·DateFeb 21, 2007

A black and white look at breast cancer mortality

New research suggests that surgery-induced angiogenesis may contribute to the racial disparity in breast cancer mortality. In pre-menopausal women, this process can encourage tumor growth, leading to poorer outcomes. The study found a mean age of 43 for diagnosis in Nigerian women compared to 64 in the UK.

SourceUniversity of East Anglia·JournalInternational Journal of Surgery·DateFeb 21, 2007

Birds plan for future meals

Researchers at the University of Cambridge discovered that western scrub-jays store food items they believe will be scarce in the future, planning accordingly. This complex behavior suggests advanced thought processes, including a sophisticated concept of past, present, and future.

SourceUniversity of Cambridge·JournalNature·DateFeb 21, 2007

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

Scientists at UC Irvine found that ozone-emitting air purifiers can create additional microscopic particles when used with household cleaning products, increasing harmful particulate matter levels. The researchers developed a mathematical model to predict whether an air purifier will make the air dirtier in a given indoor environment.

SourceUniversity of California - Irvine·JournalEnvironmental Science & Technology·DateFeb 21, 2007

Photo software creates 3-D world

Researchers developed Photo Tourism software that maps multiple photos into a 3D virtual world, solving the problem of navigating large photo collections. The technology has potential for real estate, museums, hotels, archaeologists, biologists, military, and sports enthusiasts to create interactive visual representations.

A chemotherapy drug packs a one-two punch

New research by Rockefeller University shows that bortezomib can kill multiple myeloma cells in a way that elicits an immune response, potentially enhancing patients' immunity to tumors. The treatment works by exposing heat shock proteins on dying cells, which then activate dendritic cells to present antigens to memory and killer T cells.

SourceRockefeller University·JournalBlood·DateFeb 20, 2007