Nanotopographical Control of Stem Cell Differentiation

TLDR

Stem cells can differentiate into multiple lineages, and nanotopography offers a durable, tunable surface that can guide this fate determination. The paper examines nanotopography as a means to guide differentiation, focusing on skeletal (mesenchymal) stem cells and describing its application across various stem cell subsets. The authors explore the mechanistic basis of topography‑induced differentiation by discussing indirect biochemical signaling and direct force‑mediated mechanotransduction, and by outlining proteomic data that reveals global molecular changes associated with fate determination.

Abstract

Stem cells have the capacity to differentiate into various lineages, and the ability to reliably direct stem cell fate determination would have tremendous potential for basic research and clinical therapy. Nanotopography provides a useful tool for guiding differentiation, as the features are more durable than surface chemistry and can be modified in size and shape to suit the desired application. In this paper, nanotopography is examined as a means to guide differentiation, and its application is described in the context of different subsets of stem cells, with a particular focus on skeletal (mesenchymal) stem cells. To address the mechanistic basis underlying the topographical effects on stem cells, the likely contributions of indirect (biochemical signal-mediated) and direct (force-mediated) mechanotransduction are discussed. Data from proteomic research is also outlined in relation to topography-mediated fate determination, as this approach provides insight into the global molecular changes at the level of the functional effectors.