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Science News for April 9, 2007


Pitt alumnus and professor put a face on Internet communication with personalized icon software

Researchers from the University of Pittsburgh have developed a new approach to online communication called FaceAlive Icons, which uses personalized images to convey emotions. The program allows users to alter their facial expressions and improve personal communication in emails, text messages, and online forums.

SourceUniversity of Pittsburgh·JournalJournal of Visual Languages & Computing·DateApr 9, 2007

Cocoa, but not tea, may lower blood pressure

A meta-analysis of 10 previous studies found that consuming cocoa products reduces systolic and diastolic blood pressure, comparable to the effects of blood pressure-lowering medications. However, drinking tea was not associated with a reduction in blood pressure in any of the trials.

SourceJAMA Network·JournalArchives of Internal Medicine·DateApr 9, 2007

Study examines calorie restriction and glycemic load

A new study has found that calorie-restricted diets with low or high glycemic loads result in comparable long-term weight loss. Participants lost an average of 8% of their original body weight, regardless of diet type, after one year on a 30% calorie-restricted diet.

SourceTufts University·JournalAmerican Journal of Clinical Nutrition·DateApr 9, 2007

Learning from both ends of the stethoscope

A systematic review of studies published over four decades confirms that good doctor-patient communication significantly impacts patient outcomes, including resolution of chronic headaches and improved blood pressure readings. The review highlights the importance of clarifying instructions and checking for understanding to ensure effec...

SourceIndiana University·JournalMedical Care·DateApr 9, 2007

Progress against sarcoma

Researchers at the University of Utah Health have made a significant breakthrough in understanding the origins of synovial sarcoma, a deadly cancer that affects young adults. By engineering mice to develop this cancer, scientists discovered that it originates from muscle cell precursors known as myoblasts.

SourceUniversity of Utah Health·JournalCancer Cell·DateApr 9, 2007

PSA doubling predicts prostate cancer recurrence

A detectable PSA level is first indicator of recurrent prostate cancer after radical prostatectomy, with a doubling time of less than three months indicating imminent death from prostate cancer. Patients with longer doubling times are at significant risk for disease recurrence and cancer-specific death.

SourceMayo Clinic·JournalMayo Clinic Proceedings·DateApr 9, 2007

1 donor cornea may treat 3 patients

Researchers successfully transplanted a single donor cornea into three patients with different eye conditions, demonstrating the feasibility of customized component corneal transplantation. The procedure allows for optimal use of available donor tissue, particularly in countries with limited quality and quantity of donor corneas.

SourceJAMA Network·JournalArchives of Ophthalmology·DateApr 9, 2007

The sturdier sex? -- Study by Pittsburgh scientists finds female stem cells work better

A study by Pittsburgh scientists found that female stem cells have a greater ability to regenerate skeletal muscle tissue than male cells. The researchers isolated female and male muscle-derived stem cells and tested their regenerative capabilities in dystrophic mice. Female stem cells were more efficient at regenerating skeletal muscl...

SourceChildren's Hospital of Pittsburgh·JournalJournal of Cell Biology·DateApr 9, 2007

New study sheds light on long-term effects of logging after wildfire

A new study published in Forest Ecology and Management found that logging after a wildfire can lead to high fuel accumulation, regardless of whether the site is logged or unlogged. The research showed that logging residue contributed to four times more fine fuels on the ground, while logging caused fewer snags and large woody debris.

SourceUSDA Forest Service - Pacific Northwest Research Station·JournalForest Ecology and Management·DateApr 9, 2007

Many women undertreated for ovarian cancer

A recent study found that one-third of ovarian cancer patients in the US fail to receive recommended comprehensive surgical treatment. Factors associated with undertreatment include age, race, and insurance status. The study highlights the need for increased access to specialized care from gynecologic oncologists.

SourceWiley·JournalCancer·DateApr 9, 2007

Evolution of symbiosis

Researchers discovered that a single adenine deletion in a bacterial promoter can lead to reduced heat-shock gene expression in aphids, affecting their tolerance to high temperatures. This mutation appears to confer a selective advantage under cooler conditions, allowing it to be maintained in populations.

SourcePLOS·JournalPLOS Biology·DateApr 9, 2007

Eating with our eyes: Why people eat less at unbused tables

A Cornell University study found that graduate students ate 27% less chicken wings when they could see leftover bones accumulating on their table, compared to tables where food was cleared. The study suggests using environmental cues like empty glasses or bottles to curb overeating and overdrinking at social gatherings.

SourceCornell University·JournalPerceptual and Motor Skills·DateApr 9, 2007

Trees to offset the carbon footprint?

A new study suggests that tropical rainforests are crucial in slowing down global warming, while planting trees in mid- and high-latitude locations could exacerbate climate change. The research confirms that forests in these regions would not only fail to mitigate the effects of global warming but also potentially increase temperatures.

SourceDOE/Lawrence Livermore National Laboratory·JournalProceedings of the National Academy of Sciences·DateApr 9, 2007

Pitt study notes decline in male births in the US and Japan

A study published in Environmental Health Perspectives reports a significant decline in the number of male births in the US and Japan over the past three decades. The researchers found that the decline is equivalent to 135,000 fewer white males in the US and 127,000 fewer males in Japan, with environmental factors such as prenatal expo...

SourceUniversity of Pittsburgh Schools of the Health Sciences·JournalEnvironmental Health Perspectives·DateApr 9, 2007

Mouse FH knockout resembles human renal cell cancer

A mouse model has been developed to study the relationship between hypoxia and cancer progression in renal cell cancer. The researchers observed that Fh1-deficient mice developed clonal and proliferative renal cysts with characteristic overexpression of HIF, leading to renal failure.

SourceCell Press·JournalCancer Cell·DateApr 9, 2007

Tropical forests -- Earth's air conditioner

New study suggests tropical forests are efficient at cooling the planet due to their ability to store large amounts of carbon and produce reflective clouds. In contrast, forests in snowy areas can warm the Earth by absorbing sunlight that would otherwise be reflected back into space.

SourceCarnegie Institution for Science·JournalProceedings of the National Academy of Sciences·DateApr 9, 2007

Mouse model advances understanding of synovial sarcoma

Scientists have developed a mouse model for synovial sarcoma, revealing that the tumor arises from skeletal muscle precursor cells called myoblasts. The study also showed that expression of a chimeric fusion protein called SYT-SSX in these cells is sufficient to induce synovial sarcoma with 100% penetrance.

SourceCell Press·JournalCancer Cell·DateApr 9, 2007