Maintenance of neural progenitor cell stemness in 3D hydrogels requires matrix remodelling
Artikel i vetenskaplig tidskrift, 2017

Neural progenitor cell (NPC) culture within three-dimensional (3D) hydrogels is an attractive strategy for expanding a therapeutically relevant number of stem cells. However, relatively little is known about how 3D material properties such as stiffness and degradability affect the maintenance of NPC stemness in the absence of differentiation factors. Over a physiologically relevant range of stiffness from â 1/40.5 to 50 kPa, stemness maintenance did not correlate with initial hydrogel stiffness. In contrast, hydrogel degradation was both correlated with, and necessary for, maintenance of NPC stemness. This requirement for degradation was independent of cytoskeletal tension generation and presentation of engineered adhesive ligands, instead relying on matrix remodelling to facilitate cadherin-mediated cell-cell contact and promote ?-catenin signalling. In two additional hydrogel systems, permitting NPC-mediated matrix remodelling proved to be a generalizable strategy for stemness maintenance in 3D. Our findings have identified matrix remodelling, in the absence of cytoskeletal tension generation, as a previously unknown strategy to maintain stemness in 3D.

Författare

Christopher M. Madl

Stanford University

Bauer L. Lesavage

Stanford University

Ruby E. Dewi

Stanford University

Cong B. Dinh

Stanford University

Ryan S. Stowers

Stanford University

Margarita Khariton

Stanford University

Kyle J. Lampe

University of Virginia

Stanford University

Thuy Duong Nguyen

Chalmers, Biologi och bioteknik

Ovijit Chaudhuri

Stanford University

Annika Enejder

Chalmers, Biologi och bioteknik, Kemisk biologi

S. C. Heilshorn

Stanford University

Nature Materials

1476-1122 (ISSN) 1476-4660 (eISSN)

Vol. 16 12 1233-1242

Ämneskategorier

Industriell bioteknik

DOI

10.1038/nmat5020