Scientists believe they have an explanation for the axiom that stress, emotional shock, or overexertion may trigger heart attacks in vulnerable people. Hormones released during these events appear to cause bacterial biofilms on arterial walls to disperse, allowing plaque deposits to rupture into the bloodstream.
A key molecule developed at Hybrid Plastics now forms a main component in an effort to develop synthetic human organs for medical treatment. Such organs include tear ducts, blood vessels and windpipes.
When stem cells are used to regenerate bone tissue, many wind up migrating away from the repair site, which disrupts the healing process. But a research team makes use of hydrogel polymers in keeping the stem cells in place, resulting in faster and better tissue regeneration.
Strong cell-to-cell bonds are important to heart health and fighting cancer. The bonds connecting heart cells have to withstand constant forces caused by continuous pumping. And, in some cancers, bonds no longer resist forces, allowing cancer cells to detach and spread.
A team of researchers studying a flowering plant has zeroed in on the way cells manage external signals about prevailing conditions, a capability that is essential for cells to survive in a fluctuating environment.
In laboratory tests, researchers have used electrical stimulation of retinal cells to produce the same patterns of activity that occur when the retina sees a moving object. Although more work remains, this is a step toward restoring natural, high-fidelity vision to blind people.
The transport routes of nutrients and messenger cargos can be compared to the traffic system of a city: A worldwide unique quantitative study of cell biologists shows that cells regulate the main routes, side routes and intersections by an intricate traffic control system, which guides the spatial and temporal distribution of substances within the cell.
The reason why many people are allergic to birch pollen has not been fully clarified yet. It is known that a specific birch pollen protein causes the immune system to overreact. What makes it an allergen has now been discovered by scientists at the Vetmeduni Vienna. The pollen protein can bind iron. Without iron load the protein becomes an allergen. Environmental factors are possibly the reason for low iron loads in plants.