PHILADELPHIA -– A team of scientists led by University of Pennsylvania veterinary researchers have identified a gene, TEX11, located on the X chromosome, which when disrupted in mice renders the males sterile and reduces female fecundity. This is the first study of the genetic causes of infertility that links a particular sex chromosome meiosis-specific gene to sterility.
PHILADELPHIA – University of Pennsylvania scientists studying macrophages, the biological cells that spring from white blood cells to eat and destroy foreign or dying cells, have discovered how these “policemen” differentiate between friend and foe.
The paper appears as the cover article in the March 10 edition of the Journal of Cell Biology.
PHILADELPHIA -- Biologists at the University of Pennsylvania and Harvard University have examined the complete genomes of viruses that infect the bacteria E. coli, P. aeruginosa and L. lactis and have found that many of these viral genomes exhibit codon bias, the tendency to preferentially encode a protein with a particular spelling.
Researchers analyzed patterns of codon usage across 74 bacteriophages using the concept of a "genome landscape," a method of visualizing long-range patterns in a genome sequence.
PHILADELPHIA -– A new study from the University of Pennsylvania points to increased health risks for women owing to their higher level of discomfort about being weighed in public.
The study showed that college-age females, more than their male counterparts, experience high degrees of discomfort at the prospect of being weighed in the presence of others.
The study’s authors believe that some women may avoid necessary tests and treatments when a doctor visit includes a step on a public scale.
Media Contact:Julie McWilliams | email@example.com | 215-898-1422February 26, 2008
PHILADELPHIA -- The University of Pennsylvania has selected the architectural design firm Weiss/Manfredi along with M+W Zander, an engineering and construction firm that specializes in projects with a scientific focus, to design the Krishna P. Singh Center for Nanotechnology.
PHILADELPHIA -– Sarah Tishkoff, a leading global expert in human genetics, has been named the sixth Penn Integrates Knowledge University Professor at the University of Pennsylvania.
The announcement was made today by Penn President Amy Gutmann and Provost Ronald Daniels.
PHILADELPHIA –- University of Pennsylvania engineers and physicians have developed a carbon nanopipette thousands of times thinner than a human hair that measures electric current and delivers fluids into cells. Researchers developed this tiny carbon-based tool to probe cells with minimal intrusion and inject fluids without damaging or inhibiting cell growth.
PHILADELPHIA— Researchers with the University of Pennsylvania School of Veterinary Medicine have demonstrated the process by which the cancer-causing chemical dioxin attacks the cellular machinery, disrupts normal cellular function and ultimately promotes tumor progression.