Engineering Human Tissues For Medical Impact

Abstract: Tissue engineering has progressed in response to the growing clinical demand for biological substitutes capable of restoring or replacing tissues compromised by trauma or disease, with the ultimate goal of improving patient survival and quality of life. For more than three decades, regenerative medicine strategies have combined human cells with biomaterial scaffolds—providing structural and organizational templates for tissue formation, and bioreactors, providing molecular and physical cues that regulate cell differentiation and tissue assembly, together with real-time monitoring of cellular and tissue responses [1]. Over the past decade, an additional approach has emerged in the form of microphysiological systems, also known as “organs-on-chip,” which are designed to recapitulate organ-level functions within physiologically optimized microenvironments [2]. These platforms can support individual tissue types or integrate multicellular, perfused networks that model systemic human physiology [3]. Engineered human skeletal tissues—including bone, osteochondral grafts, bone marrow, and neuromuscular junctions—have shown increasing value for patient-specific modeling of injury, regeneration, and disease [4]. Recognizing their significant translational potential, the U.S. Food and Drug Administration has prioritized the use of human tissue models in preclinical studies of regenerative medicine, disease progression, and therapeutic development. This lecture will discuss engineering human tissues for medical impact, and highlight some of the opportunities and challenges currently facing the field.

Learning Objectives:
1). Understand the principles of tissue engineering by examining the integration of human cells, biomaterial scaffolds, and bioreactors to support tissue regeneration and function.
2). Explore the role of organ-on-chip systems in replicating organ-level functions, enabling physiologically relevant modeling of injury, regeneration, and disease progression.
3). Evaluate applications of engineered tissues in bone-related contexts (e.g., bone regeneration, marrow injury, cancer remodeling, and metastasis) and their impact on therapeutic discovery and preclinical studies.