Robert T. Tranquillo

Robert T. Tranquillo serves as a Distinguished McKnight University Professor in the Department of Biomedical Engineering at the University of Minnesota's College of Science and Engineering. His research focuses on developing biologically-engineered vascular grafts, heart valves, and vein valves using tissue engineering approaches. Notably, his lab has demonstrated that their engineered material, produced by skin cells (fibroblasts), has the capacity to grow, which may transform the treatment of pediatric congenital heart defects.

Tranquillo's research interests center on cardiovascular tissue engineering, particularly the development of "off-the-shelf" vascular grafts and heart valves. His lab fabricates tissue-equivalents by entrapping fibroblasts in fibrin gel and constraining cell-mediated gel compaction to create aligned fibrin structures. Using bioreactors, they stimulate cells to replace aligned fibrin with collagenous matrix, creating tubes suitable for surgical implantation. Upon decellularization, these become non-immunogenic replacements that support host recellularization and growth. His current work focuses on transcatheter heart valves and vein valves, combining engineered matrix tubes with stent technology, and conferring hemocompatibility using stem cell and small molecule strategies. A key aspect of his research investigates contact guidance—the ability of cells to sense and align with fibers—which is crucial for creating tissues with prescribed alignment.

His publication record shows consistent output in top journals including Nature Communications, Science Translational Medicine, and PNAS, with recent work focusing on contact guidance mechanisms, pediatric valve conduits, and transcatheter valve development. His research demonstrates a clear trajectory from fundamental biomechanics to translational applications in cardiovascular medicine.

• Distinguished McKnight University Professor (prestigious University of Minnesota honor)

Tranquillo has mentored over 40 PhD students and postdocs who have gone on to prominent positions in academia (professors at UCLA, Rutgers, Penn State), industry (Medtronic, Abbott, Boston Scientific), and government (NSF, NRO). His lab has received substantial research funding supporting their work on tissue-engineered cardiovascular replacements. The Tranquillo Research Group maintains an active website detailing their current projects and methodologies.

The Tranquillo Research Group operates within the Department of Biomedical Engineering at the University of Minnesota, with laboratory facilities focused on tissue engineering, biomechanics, and cardiovascular device development. Their work bridges fundamental cell-matrix interactions with translational applications for cardiovascular disease treatment.