75 Results for 'Tissue Engineering'
Regenerating heart valves
The human heart beats approximately 35 million times every year, pumping blood into the circulation via four different heart valves. In more than four million people each year, heart valves fail for different reasons, including birth defects, age-related deteriorations and infections. At present, clinicians use either artificial prostheses or fixed animal and cadaver-sourced tissue to...
Ultra-Strong Flexible Biomaterials
Hydrogels are already being developed for use as scaffolds for tissue engineering, vehicles for drug delivery, actuators for optics and fluidics, and models for biological studies of tissue-supporting material called the extracellular matrix. But these water-rich polymer gels are weak; they rupture if stretched just a little, and they break easily compared with resilient biological...
Clinical studies take years to complete and testing a single compound can cost more than $2 billion. Meanwhile, innumerable animal lives are lost, and the process often fails to predict human responses because traditional animal models often do not accurately mimic human pathophysiology. For these reasons, there is a broad need for alternative ways to...
4D Printing of Shapeshifting Devices
Organisms, such as flowers and plants, have tissue compositions and microstructures creating dynamic morphologies that can shapeshift in response to changes in their environments. Researchers at the Wyss Institute have mimicked a variety of such dynamic shape changes like those performed by tendrils, leaves, and flowers in response to changes in humidity or temperature with...
3D Bioprinting of Living Tissues
Progress in drug testing and regenerative medicine could greatly benefit from laboratory-engineered human tissues built of a variety of cell types with precise 3D architecture. But production of greater than millimeter sized human tissues has been limited by a lack of methods for building tissues with embedded life-sustaining vascular networks. In this video, the Wyss...