Back Cover: Tissue scaffolds allowing the behavior of the cells that reside within them to be controlled are of particular interest for tissue engineering. Herein, the preparation of conductive nanofiber-based bone tissue scaffolds are described, made from nonwoven mats of electrospun polycaprolactone with an interpenetrating network of polypyrrole and polystyrenesulfonate. These scaffolds enable the electrical stimulation of human mesenchymal stem cells to enhance their differentiation toward osteogenic outcomes. Further details can be found in the article by J. G. Hardy,* M. K. Villancio-Wolter, R. C. Sukhavasi, D. J. Mouser, D. Aguilar Jr., S. A. Geissler, D. L. Kaplan,* and C. E. Schmidt* on page 1884.
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