Latest University of Pennsylvania School Stories
Otters cavorting in the water is a scene with which weâ€™re all familiar. Yet, unlike many other mammals that spend a considerable amount of time in the waterâ€“polar bears, seals, dolphins, and whalesâ€“river otters do not have a thick layer of body fat to keep warm. They rely, instead, on a few unique adaptations; namely, their fur and the densely packed layer of specially adapted underhairs.
In a commentary piece in the August 10th issue of the Journal of the American Medical Association, Scott D. Halpern, MD, PhD, of the University of Pennsylvania School of Medicine, calls for a revision of existing state laws so that HIV-testing may be carried out when patients are not able to give their direct consent for such testing.
Researchers from the University of Pennsylvania School of Medicine found that a protein called NF-Ya activates several genes known to regulate the development of hematopoietic stem cells (HSC), or blood-producing stem cells, in bone marrow.
Researchers from the University of Pennsylvania School of Medicine have found that inhibitors of an enzyme called cathepsin L prevent the SARS (severe acute respiratory syndrome) virus from entering target cells. SARS is caused by an emergent coronavirus. There is no effective treatment at this time.
Researchers at the University of Pennsylvania School of Medicine have determined how serotonin decreases the body's sensitivity to light and that exposure to constant darkness leads to a decrease in serotonin levels in the brain of fruit flies.
For the first time ever, using \"laser tweezers,\" the mechanical properties of an individual fiber in a blood clot have been determined by researchers at the University of Pennsylvania School of Medicine. Their work provides a basis for understanding how the elasticity of the whole clot arises.
Almost 47 million Americans don't have rapid access to specialized trauma treatment centers should they get hurt in a serious accident, a national survey finds.