- Develop and leverage novel technologies to investigate heart valve, left ventricular outflow tract, and intestinal biology, pathology, and therapies
- Establish new paradigms to characterize the extracellular matrix basis for soft tissue mechanics
- Translate our findings to prevent valve disease, develop new therapies, and improve the survival and quality of life of affected patients
- Provide comprehensive education, training, and career development experiences for science and engineering students of all ages
Work in our laboratory uses the engineering analysis of tissue composition and behavior to investigate tissue and cellular responses to disease. Historically we have used the cardiac valves as a paradigm for other soft tissues. We have now expanded into models of small and large intestine and the left ventricular outflow tract of the heart These projects are interdisciplinary, innovative, medically and biologically applicable, and clinically relevant.
The overall focus of our research is to characterize and eventually to manipulate the structure-function-environment relationship of soft tissues in an integrative fashion (cellular, tissue, organ, and clinical). For example, the matrix composition and material properties of heart valves are believed to be determined by the load patterns imposed during valve function. Consequently, alterations to the normal tissue loading patterns will affect the cellular phenotypic production of extracellular matrix and transform the valve morphology, mechanics, and function. To relate tissue composition and mechanics in normal and diseased tissues, our laboratory performs mechanical testing, biochemical measurements, and microstructural analysis of the extracellular matrix (especially glycosaminoglycans (GAGs) and proteoglycans) of these tissues. These techniques have allowed us to gain understanding about the extracellular matrix (ECM) that underlies the mechanical behavior of valves, and how the ECM varies across the tissue microstructure. We then correlate these data with echocardiographically assessed cardiac functional parameters and clinical demographics when applicable. We are also using cells, organ cultures, and tissue engineering approaches to investigate valve and cardiac disease from a more mechanistic angle. The main diseases that we study are myxomatous (“floppy”) mitral valve disease, calcific aortic valve disease, secondary remodeling of the heart valves in patients with heart failure, and discrete subaortic stenosis, a narrowing of the left ventricular outflow tract, but this research may have implications and applications for other soft tissues. Our goal in characterizing the normal and pathological mechanisms of remodeling is to derive novel surgical and medical therapies that can be used to treat patients earlier in the disease process, as well as identify which patients are likely to have a recurrence of discrete subaortic stenosis.
Our lab members can be found building mechanical devices to investigate potential disease mechanisms, comprehensively characterizing tissues, performing studies of mechanobiology, or developing novel materials and therapies for treating heart valve disease. We have developed novel biomaterials and tissue engineered materials for heart valves and other tissues by fusing technologies from genetic engineering, 3D tissue culture, and more recently micro/nanofabrication approaches.