“…The logic of replacing several decades we have gained an increasingly sophistilost populations of cells is inherently appealing: animal cated knowledge of the biological and molecular mechastudies and recent clinical studies have clearly demonnisms of numerous degenerative diseases. At the same strated that transplanted cells can survive and promote time, advances in combinatorial chemistry, genetic enfunctional recovery (29,54,58,92,103,110,113,114). Degineering, genomics, and proteomics are increasing the spite this promise, the limited tissue availability and the number of proteins, peptides, and other compounds with need for chronic systemic immunosuppression are major treatment potential.…”